diff options
Diffstat (limited to 'include/spdlog/fmt/bundled/format.h')
| -rw-r--r-- | include/spdlog/fmt/bundled/format.h | 7617 |
1 files changed, 3879 insertions, 3738 deletions
diff --git a/include/spdlog/fmt/bundled/format.h b/include/spdlog/fmt/bundled/format.h index 2fa3dc14..b0f59d88 100644 --- a/include/spdlog/fmt/bundled/format.h +++ b/include/spdlog/fmt/bundled/format.h @@ -292,871 +292,887 @@ typedef __int64 intmax_t; #if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) # include <intrin.h> // _BitScanReverse, _BitScanReverse64 -namespace fmt { - namespace internal { +namespace fmt +{ +namespace internal +{ # pragma intrinsic(_BitScanReverse) - inline uint32_t clz(uint32_t x) - { - unsigned long r = 0; - _BitScanReverse(&r, x); - - assert(x != 0); - // Static analysis complains about using uninitialized data - // "r", but the only way that can happen is if "x" is 0, - // which the callers guarantee to not happen. +inline uint32_t clz(uint32_t x) +{ + unsigned long r = 0; + _BitScanReverse(&r, x); + + assert(x != 0); + // Static analysis complains about using uninitialized data + // "r", but the only way that can happen is if "x" is 0, + // which the callers guarantee to not happen. # pragma warning(suppress: 6102) - return 31 - r; - } + return 31 - r; +} # define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n) # ifdef _WIN64 # pragma intrinsic(_BitScanReverse64) # endif - inline uint32_t clzll(uint64_t x) - { - unsigned long r = 0; +inline uint32_t clzll(uint64_t x) +{ + unsigned long r = 0; # ifdef _WIN64 - _BitScanReverse64(&r, x); + _BitScanReverse64(&r, x); # else - // Scan the high 32 bits. - if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) - return 63 - (r + 32); + // Scan the high 32 bits. + if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) + return 63 - (r + 32); - // Scan the low 32 bits. - _BitScanReverse(&r, static_cast<uint32_t>(x)); + // Scan the low 32 bits. + _BitScanReverse(&r, static_cast<uint32_t>(x)); # endif - assert(x != 0); - // Static analysis complains about using uninitialized data - // "r", but the only way that can happen is if "x" is 0, - // which the callers guarantee to not happen. + assert(x != 0); + // Static analysis complains about using uninitialized data + // "r", but the only way that can happen is if "x" is 0, + // which the callers guarantee to not happen. # pragma warning(suppress: 6102) - return 63 - r; - } + return 63 - r; +} # define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n) - } +} } #endif -namespace fmt { - namespace internal { - struct DummyInt - { - int data[2]; - operator int() const - { - return 0; - } - }; - typedef std::numeric_limits<fmt::internal::DummyInt> FPUtil; - - // Dummy implementations of system functions such as signbit and ecvt called - // if the latter are not available. - inline DummyInt signbit(...) - { - return DummyInt(); - } - inline DummyInt _ecvt_s(...) - { - return DummyInt(); - } - inline DummyInt isinf(...) - { - return DummyInt(); - } - inline DummyInt _finite(...) - { - return DummyInt(); - } - inline DummyInt isnan(...) - { - return DummyInt(); - } - inline DummyInt _isnan(...) - { - return DummyInt(); - } - - // A helper function to suppress bogus "conditional expression is constant" - // warnings. - template <typename T> - inline T const_check(T value) - { - return value; - } - } +namespace fmt +{ +namespace internal +{ +struct DummyInt +{ + int data[2]; + operator int() const + { + return 0; + } +}; +typedef std::numeric_limits<fmt::internal::DummyInt> FPUtil; + +// Dummy implementations of system functions such as signbit and ecvt called +// if the latter are not available. +inline DummyInt signbit(...) +{ + return DummyInt(); +} +inline DummyInt _ecvt_s(...) +{ + return DummyInt(); +} +inline DummyInt isinf(...) +{ + return DummyInt(); +} +inline DummyInt _finite(...) +{ + return DummyInt(); +} +inline DummyInt isnan(...) +{ + return DummyInt(); +} +inline DummyInt _isnan(...) +{ + return DummyInt(); +} + +// A helper function to suppress bogus "conditional expression is constant" +// warnings. +template <typename T> +inline T const_check(T value) +{ + return value; +} +} } // namespace fmt -namespace std { - // Standard permits specialization of std::numeric_limits. This specialization - // is used to resolve ambiguity between isinf and std::isinf in glibc: - // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891 - // and the same for isnan and signbit. - template <> - class numeric_limits<fmt::internal::DummyInt>: - public std::numeric_limits<int> - { - public: - // Portable version of isinf. - template <typename T> - static bool isinfinity(T x) - { - using namespace fmt::internal; - // The resolution "priority" is: - // isinf macro > std::isinf > ::isinf > fmt::internal::isinf - if (const_check(sizeof(isinf(x)) == sizeof(bool) || - sizeof(isinf(x)) == sizeof(int))) { - return isinf(x) != 0; - } - return !_finite(static_cast<double>(x)); - } - - // Portable version of isnan. - template <typename T> - static bool isnotanumber(T x) - { - using namespace fmt::internal; - if (const_check(sizeof(isnan(x)) == sizeof(bool) || - sizeof(isnan(x)) == sizeof(int))) { - return isnan(x) != 0; - } - return _isnan(static_cast<double>(x)) != 0; - } - - // Portable version of signbit. - static bool isnegative(double x) - { - using namespace fmt::internal; - if (const_check(sizeof(signbit(x)) == sizeof(bool) || - sizeof(signbit(x)) == sizeof(int))) { - return signbit(x) != 0; - } - if (x < 0) return true; - if (!isnotanumber(x)) return false; - int dec = 0, sign = 0; - char buffer[2]; // The buffer size must be >= 2 or _ecvt_s will fail. - _ecvt_s(buffer, sizeof(buffer), x, 0, &dec, &sign); - return sign != 0; - } - }; +namespace std +{ +// Standard permits specialization of std::numeric_limits. This specialization +// is used to resolve ambiguity between isinf and std::isinf in glibc: +// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891 +// and the same for isnan and signbit. +template <> +class numeric_limits<fmt::internal::DummyInt>: + public std::numeric_limits<int> +{ +public: + // Portable version of isinf. + template <typename T> + static bool isinfinity(T x) + { + using namespace fmt::internal; + // The resolution "priority" is: + // isinf macro > std::isinf > ::isinf > fmt::internal::isinf + if (const_check(sizeof(isinf(x)) == sizeof(bool) || + sizeof(isinf(x)) == sizeof(int))) + { + return isinf(x) != 0; + } + return !_finite(static_cast<double>(x)); + } + + // Portable version of isnan. + template <typename T> + static bool isnotanumber(T x) + { + using namespace fmt::internal; + if (const_check(sizeof(isnan(x)) == sizeof(bool) || + sizeof(isnan(x)) == sizeof(int))) + { + return isnan(x) != 0; + } + return _isnan(static_cast<double>(x)) != 0; + } + + // Portable version of signbit. + static bool isnegative(double x) + { + using namespace fmt::internal; + if (const_check(sizeof(signbit(x)) == sizeof(bool) || + sizeof(signbit(x)) == sizeof(int))) + { + return signbit(x) != 0; + } + if (x < 0) return true; + if (!isnotanumber(x)) return false; + int dec = 0, sign = 0; + char buffer[2]; // The buffer size must be >= 2 or _ecvt_s will fail. + _ecvt_s(buffer, sizeof(buffer), x, 0, &dec, &sign); + return sign != 0; + } +}; } // namespace std -namespace fmt { +namespace fmt +{ - // Fix the warning about long long on older versions of GCC - // that don't support the diagnostic pragma. - FMT_GCC_EXTENSION typedef long long LongLong; - FMT_GCC_EXTENSION typedef unsigned long long ULongLong; +// Fix the warning about long long on older versions of GCC +// that don't support the diagnostic pragma. +FMT_GCC_EXTENSION typedef long long LongLong; +FMT_GCC_EXTENSION typedef unsigned long long ULongLong; #if FMT_USE_RVALUE_REFERENCES - using std::move; +using std::move; #endif - template <typename Char> - class BasicWriter; - - typedef BasicWriter<char> Writer; - typedef BasicWriter<wchar_t> WWriter; - - template <typename Char> - class ArgFormatter; - - template <typename Impl, typename Char> - class BasicPrintfArgFormatter; - - template <typename CharType, - typename ArgFormatter = fmt::ArgFormatter<CharType> > - class BasicFormatter; - - /** - \rst - A string reference. It can be constructed from a C string or ``std::string``. - - You can use one of the following typedefs for common character types: - - +------------+-------------------------+ - | Type | Definition | - +============+=========================+ - | StringRef | BasicStringRef<char> | - +------------+-------------------------+ - | WStringRef | BasicStringRef<wchar_t> | - +------------+-------------------------+ - - This class is most useful as a parameter type to allow passing - different types of strings to a function, for example:: - - template <typename... Args> - std::string format(StringRef format_str, const Args & ... args); - - format("{}", 42); - format(std::string("{}"), 42); - \endrst - */ - template <typename Char> - class BasicStringRef - { - private: - const Char *data_; - std::size_t size_; - - public: - /** Constructs a string reference object from a C string and a size. */ - BasicStringRef(const Char *s, std::size_t size): data_(s), size_(size) - {} - - /** - \rst - Constructs a string reference object from a C string computing - the size with ``std::char_traits<Char>::length``. - \endrst - */ - BasicStringRef(const Char *s) - : data_(s), size_(std::char_traits<Char>::length(s)) - {} - - /** - \rst - Constructs a string reference from an ``std::string`` object. - \endrst - */ - BasicStringRef(const std::basic_string<Char> &s) - : data_(s.c_str()), size_(s.size()) - {} - - /** - \rst - Converts a string reference to an ``std::string`` object. - \endrst - */ - std::basic_string<Char> to_string() const - { - return std::basic_string<Char>(data_, size_); - } - - /** Returns a pointer to the string data. */ - const Char *data() const - { - return data_; - } - - /** Returns the string size. */ - std::size_t size() const - { - return size_; - } - - // Lexicographically compare this string reference to other. - int compare(BasicStringRef other) const - { - std::size_t size = size_ < other.size_ ? size_ : other.size_; - int result = std::char_traits<Char>::compare(data_, other.data_, size); - if (result == 0) - result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1); - return result; - } - - friend bool operator==(BasicStringRef lhs, BasicStringRef rhs) - { - return lhs.compare(rhs) == 0; - } - friend bool operator!=(BasicStringRef lhs, BasicStringRef rhs) - { - return lhs.compare(rhs) != 0; - } - friend bool operator<(BasicStringRef lhs, BasicStringRef rhs) - { - return lhs.compare(rhs) < 0; - } - friend bool operator<=(BasicStringRef lhs, BasicStringRef rhs) - { - return lhs.compare(rhs) <= 0; - } - friend bool operator>(BasicStringRef lhs, BasicStringRef rhs) - { - return lhs.compare(rhs) > 0; - } - friend bool operator>=(BasicStringRef lhs, BasicStringRef rhs) - { - return lhs.compare(rhs) >= 0; - } - }; - - typedef BasicStringRef<char> StringRef; - typedef BasicStringRef<wchar_t> WStringRef; - - /** - \rst - A reference to a null terminated string. It can be constructed from a C - string or ``std::string``. - - You can use one of the following typedefs for common character types: - - +-------------+--------------------------+ - | Type | Definition | - +=============+==========================+ - | CStringRef | BasicCStringRef<char> | - +-------------+--------------------------+ - | WCStringRef | BasicCStringRef<wchar_t> | - +-------------+--------------------------+ - - This class is most useful as a parameter type to allow passing - different types of strings to a function, for example:: - - template <typename... Args> - std::string format(CStringRef format_str, const Args & ... args); - - format("{}", 42); - format(std::string("{}"), 42); - \endrst - */ - template <typename Char> - class BasicCStringRef - { - private: - const Char *data_; - - public: - /** Constructs a string reference object from a C string. */ - BasicCStringRef(const Char *s): data_(s) - {} - - /** - \rst - Constructs a string reference from an ``std::string`` object. - \endrst - */ - BasicCStringRef(const std::basic_string<Char> &s): data_(s.c_str()) - {} - - /** Returns the pointer to a C string. */ - const Char *c_str() const - { - return data_; - } - }; - - typedef BasicCStringRef<char> CStringRef; - typedef BasicCStringRef<wchar_t> WCStringRef; - - /** A formatting error such as invalid format string. */ - class FormatError: public std::runtime_error - { - public: - explicit FormatError(CStringRef message) - : std::runtime_error(message.c_str()) - {} - FormatError(const FormatError &ferr): std::runtime_error(ferr) - {} - ~FormatError() FMT_DTOR_NOEXCEPT; - }; - - namespace internal { - - // MakeUnsigned<T>::Type gives an unsigned type corresponding to integer type T. - template <typename T> - struct MakeUnsigned - { - typedef T Type; - }; +template <typename Char> +class BasicWriter; + +typedef BasicWriter<char> Writer; +typedef BasicWriter<wchar_t> WWriter; + +template <typename Char> +class ArgFormatter; + +template <typename Impl, typename Char> +class BasicPrintfArgFormatter; + +template <typename CharType, + typename ArgFormatter = fmt::ArgFormatter<CharType> > +class BasicFormatter; + +/** +\rst +A string reference. It can be constructed from a C string or ``std::string``. + +You can use one of the following typedefs for common character types: + ++------------+-------------------------+ +| Type | Definition | ++============+=========================+ +| StringRef | BasicStringRef<char> | ++------------+-------------------------+ +| WStringRef | BasicStringRef<wchar_t> | ++------------+-------------------------+ + +This class is most useful as a parameter type to allow passing +different types of strings to a function, for example:: + +template <typename... Args> +std::string format(StringRef format_str, const Args & ... args); + +format("{}", 42); +format(std::string("{}"), 42); +\endrst +*/ +template <typename Char> +class BasicStringRef +{ +private: + const Char *data_; + std::size_t size_; + +public: + /** Constructs a string reference object from a C string and a size. */ + BasicStringRef(const Char *s, std::size_t size): data_(s), size_(size) + {} + + /** + \rst + Constructs a string reference object from a C string computing + the size with ``std::char_traits<Char>::length``. + \endrst + */ + BasicStringRef(const Char *s) + : data_(s), size_(std::char_traits<Char>::length(s)) + {} + + /** + \rst + Constructs a string reference from an ``std::string`` object. + \endrst + */ + BasicStringRef(const std::basic_string<Char> &s) + : data_(s.c_str()), size_(s.size()) + {} + + /** + \rst + Converts a string reference to an ``std::string`` object. + \endrst + */ + std::basic_string<Char> to_string() const + { + return std::basic_string<Char>(data_, size_); + } + + /** Returns a pointer to the string data. */ + const Char *data() const + { + return data_; + } + + /** Returns the string size. */ + std::size_t size() const + { + return size_; + } + + // Lexicographically compare this string reference to other. + int compare(BasicStringRef other) const + { + std::size_t size = size_ < other.size_ ? size_ : other.size_; + int result = std::char_traits<Char>::compare(data_, other.data_, size); + if (result == 0) + result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1); + return result; + } + + friend bool operator==(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) == 0; + } + friend bool operator!=(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) != 0; + } + friend bool operator<(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) < 0; + } + friend bool operator<=(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) <= 0; + } + friend bool operator>(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) > 0; + } + friend bool operator>=(BasicStringRef lhs, BasicStringRef rhs) + { + return lhs.compare(rhs) >= 0; + } +}; + +typedef BasicStringRef<char> StringRef; +typedef BasicStringRef<wchar_t> WStringRef; + +/** +\rst +A reference to a null terminated string. It can be constructed from a C +string or ``std::string``. + +You can use one of the following typedefs for common character types: + ++-------------+--------------------------+ +| Type | Definition | ++=============+==========================+ +| CStringRef | BasicCStringRef<char> | ++-------------+--------------------------+ +| WCStringRef | BasicCStringRef<wchar_t> | ++-------------+--------------------------+ + +This class is most useful as a parameter type to allow passing +different types of strings to a function, for example:: + +template <typename... Args> +std::string format(CStringRef format_str, const Args & ... args); + +format("{}", 42); +format(std::string("{}"), 42); +\endrst +*/ +template <typename Char> +class BasicCStringRef +{ +private: + const Char *data_; + +public: + /** Constructs a string reference object from a C string. */ + BasicCStringRef(const Char *s): data_(s) + {} + + /** + \rst + Constructs a string reference from an ``std::string`` object. + \endrst + */ + BasicCStringRef(const std::basic_string<Char> &s): data_(s.c_str()) + {} + + /** Returns the pointer to a C string. */ + const Char *c_str() const + { + return data_; + } +}; + +typedef BasicCStringRef<char> CStringRef; +typedef BasicCStringRef<wchar_t> WCStringRef; + +/** A formatting error such as invalid format string. */ +class FormatError: public std::runtime_error +{ +public: + explicit FormatError(CStringRef message) + : std::runtime_error(message.c_str()) + {} + FormatError(const FormatError &ferr): std::runtime_error(ferr) + {} + ~FormatError() FMT_DTOR_NOEXCEPT; +}; + +namespace internal +{ + +// MakeUnsigned<T>::Type gives an unsigned type corresponding to integer type T. +template <typename T> +struct MakeUnsigned +{ + typedef T Type; +}; #define FMT_SPECIALIZE_MAKE_UNSIGNED(T, U) \ template <> \ struct MakeUnsigned<T> { typedef U Type; } - FMT_SPECIALIZE_MAKE_UNSIGNED(char, unsigned char); - FMT_SPECIALIZE_MAKE_UNSIGNED(signed char, unsigned char); - FMT_SPECIALIZE_MAKE_UNSIGNED(short, unsigned short); - FMT_SPECIALIZE_MAKE_UNSIGNED(int, unsigned); - FMT_SPECIALIZE_MAKE_UNSIGNED(long, unsigned long); - FMT_SPECIALIZE_MAKE_UNSIGNED(LongLong, ULongLong); - - // Casts nonnegative integer to unsigned. - template <typename Int> - inline typename MakeUnsigned<Int>::Type to_unsigned(Int value) - { - FMT_ASSERT(value >= 0, "negative value"); - return static_cast<typename MakeUnsigned<Int>::Type>(value); - } - - // The number of characters to store in the MemoryBuffer object itself - // to avoid dynamic memory allocation. - enum - { - INLINE_BUFFER_SIZE = 500 - }; +FMT_SPECIALIZE_MAKE_UNSIGNED(char, unsigned char); +FMT_SPECIALIZE_MAKE_UNSIGNED(signed char, unsigned char); +FMT_SPECIALIZE_MAKE_UNSIGNED(short, unsigned short); +FMT_SPECIALIZE_MAKE_UNSIGNED(int, unsigned); +FMT_SPECIALIZE_MAKE_UNSIGNED(long, unsigned long); +FMT_SPECIALIZE_MAKE_UNSIGNED(LongLong, ULongLong); + +// Casts nonnegative integer to unsigned. +template <typename Int> +inline typename MakeUnsigned<Int>::Type to_unsigned(Int value) +{ + FMT_ASSERT(value >= 0, "negative value"); + return static_cast<typename MakeUnsigned<Int>::Type>(value); +} + +// The number of characters to store in the MemoryBuffer object itself +// to avoid dynamic memory allocation. +enum +{ + INLINE_BUFFER_SIZE = 500 +}; #if FMT_SECURE_SCL - // Use checked iterator to avoid warnings on MSVC. - template <typename T> - inline stdext::checked_array_iterator<T*> make_ptr(T *ptr, std::size_t size) - { - return stdext::checked_array_iterator<T*>(ptr, size); - } +// Use checked iterator to avoid warnings on MSVC. +template <typename T> +inline stdext::checked_array_iterator<T*> make_ptr(T *ptr, std::size_t size) +{ + return stdext::checked_array_iterator<T*>(ptr, size); +} #else - template <typename T> - inline T *make_ptr(T *ptr, std::size_t) - { - return ptr; - } +template <typename T> +inline T *make_ptr(T *ptr, std::size_t) +{ + return ptr; +} #endif - } // namespace internal - - /** - \rst - A buffer supporting a subset of ``std::vector``'s operations. - \endrst - */ - template <typename T> - class Buffer - { - private: - FMT_DISALLOW_COPY_AND_ASSIGN(Buffer); - - protected: - T *ptr_; - std::size_t size_; - std::size_t capacity_; - - Buffer(T *ptr = FMT_NULL, std::size_t capacity = 0) - : ptr_(ptr), size_(0), capacity_(capacity) - {} - - /** - \rst - Increases the buffer capacity to hold at least *size* elements updating - ``ptr_`` and ``capacity_``. - \endrst - */ - virtual void grow(std::size_t size) = 0; - - public: - virtual ~Buffer() - {} - - /** Returns the size of this buffer. */ - std::size_t size() const - { - return size_; - } - - /** Returns the capacity of this buffer. */ - std::size_t capacity() const - { - return capacity_; - } - - /** - Resizes the buffer. If T is a POD type new elements may not be initialized. - */ - void resize(std::size_t new_size) - { - if (new_size > capacity_) - grow(new_size); - size_ = new_size; - } - - /** - \rst - Reserves space to store at least *capacity* elements. - \endrst - */ - void reserve(std::size_t capacity) - { - if (capacity > capacity_) - grow(capacity); - } - - void clear() FMT_NOEXCEPT - { - size_ = 0; - } - - void push_back(const T &value) - { - if (size_ == capacity_) - grow(size_ + 1); - ptr_[size_++] = value; - } - - /** Appends data to the end of the buffer. */ - template <typename U> - void append(const U *begin, const U *end); - - T &operator[](std::size_t index) - { - return ptr_[index]; - } - const T &operator[](std::size_t index) const - { - return ptr_[index]; - } - }; - - template <typename T> - template <typename U> - void Buffer<T>::append(const U *begin, const U *end) - { - std::size_t new_size = size_ + internal::to_unsigned(end - begin); - if (new_size > capacity_) - grow(new_size); - std::uninitialized_copy(begin, end, - internal::make_ptr(ptr_, capacity_) + size_); - size_ = new_size; - } - - namespace internal { - - // A memory buffer for trivially copyable/constructible types with the first - // SIZE elements stored in the object itself. - template <typename T, std::size_t SIZE, typename Allocator = std::allocator<T> > - class MemoryBuffer: private Allocator, public Buffer<T> - { - private: - T data_[SIZE]; - - // Deallocate memory allocated by the buffer. - void deallocate() - { - if (this->ptr_ != data_) Allocator::deallocate(this->ptr_, this->capacity_); - } - - protected: - void grow(std::size_t size) FMT_OVERRIDE; - - public: - explicit MemoryBuffer(const Allocator &alloc = Allocator()) - : Allocator(alloc), Buffer<T>(data_, SIZE) - {} - ~MemoryBuffer() - { - deallocate(); - } +} // namespace internal + +/** +\rst +A buffer supporting a subset of ``std::vector``'s operations. +\endrst +*/ +template <typename T> +class Buffer +{ +private: + FMT_DISALLOW_COPY_AND_ASSIGN(Buffer); + +protected: + T *ptr_; + std::size_t size_; + std::size_t capacity_; + + Buffer(T *ptr = FMT_NULL, std::size_t capacity = 0) + : ptr_(ptr), size_(0), capacity_(capacity) + {} + + /** + \rst + Increases the buffer capacity to hold at least *size* elements updating + ``ptr_`` and ``capacity_``. + \endrst + */ + virtual void grow(std::size_t size) = 0; + +public: + virtual ~Buffer() + {} + + /** Returns the size of this buffer. */ + std::size_t size() const + { + return size_; + } + + /** Returns the capacity of this buffer. */ + std::size_t capacity() const + { + return capacity_; + } + + /** + Resizes the buffer. If T is a POD type new elements may not be initialized. + */ + void resize(std::size_t new_size) + { + if (new_size > capacity_) + grow(new_size); + size_ = new_size; + } + + /** + \rst + Reserves space to store at least *capacity* elements. + \endrst + */ + void reserve(std::size_t capacity) + { + if (capacity > capacity_) + grow(capacity); + } + + void clear() FMT_NOEXCEPT + { + size_ = 0; + } + + void push_back(const T &value) + { + if (size_ == capacity_) + grow(size_ + 1); + ptr_[size_++] = value; + } + + /** Appends data to the end of the buffer. */ + template <typename U> + void append(const U *begin, const U *end); + + T &operator[](std::size_t index) + { + return ptr_[index]; + } + const T &operator[](std::size_t index) const + { + return ptr_[index]; + } +}; + +template <typename T> +template <typename U> +void Buffer<T>::append(const U *begin, const U *end) +{ + std::size_t new_size = size_ + internal::to_unsigned(end - begin); + if (new_size > capacity_) + grow(new_size); + std::uninitialized_copy(begin, end, + internal::make_ptr(ptr_, capacity_) + size_); + size_ = new_size; +} + +namespace internal +{ + +// A memory buffer for trivially copyable/constructible types with the first +// SIZE elements stored in the object itself. +template <typename T, std::size_t SIZE, typename Allocator = std::allocator<T> > +class MemoryBuffer: private Allocator, public Buffer<T> +{ +private: + T data_[SIZE]; + + // Deallocate memory allocated by the buffer. + void deallocate() + { + if (this->ptr_ != data_) Allocator::deallocate(this->ptr_, this->capacity_); + } + +protected: + void grow(std::size_t size) FMT_OVERRIDE; + +public: + explicit MemoryBuffer(const Allocator &alloc = Allocator()) + : Allocator(alloc), Buffer<T>(data_, SIZE) + {} + ~MemoryBuffer() + { + deallocate(); + } #if FMT_USE_RVALUE_REFERENCES - private: - // Move data from other to this buffer. - void move(MemoryBuffer &other) - { - Allocator &this_alloc = *this, &other_alloc = other; - this_alloc = std::move(other_alloc); - this->size_ = other.size_; - this->capacity_ = other.capacity_; - if (other.ptr_ == other.data_) { - this->ptr_ = data_; - std::uninitialized_copy(other.data_, other.data_ + this->size_, - make_ptr(data_, this->capacity_)); - } - else { - this->ptr_ = other.ptr_; - // Set pointer to the inline array so that delete is not called - // when deallocating. - other.ptr_ = other.data_; - } - } - - public: - MemoryBuffer(MemoryBuffer &&other) - { - move(other); - } - - MemoryBuffer &operator=(MemoryBuffer &&other) - { - assert(this != &other); - deallocate(); - move(other); - return *this; - } +private: + // Move data from other to this buffer. + void move(MemoryBuffer &other) + { + Allocator &this_alloc = *this, &other_alloc = other; + this_alloc = std::move(other_alloc); + this->size_ = other.size_; + this->capacity_ = other.capacity_; + if (other.ptr_ == other.data_) + { + this->ptr_ = data_; + std::uninitialized_copy(other.data_, other.data_ + this->size_, + make_ptr(data_, this->capacity_)); + } + else + { + this->ptr_ = other.ptr_; + // Set pointer to the inline array so that delete is not called + // when deallocating. + other.ptr_ = other.data_; + } + } + +public: + MemoryBuffer(MemoryBuffer &&other) + { + move(other); + } + + MemoryBuffer &operator=(MemoryBuffer &&other) + { + assert(this != &other); + deallocate(); + move(other); + return *this; + } #endif - // Returns a copy of the allocator associated with this buffer. - Allocator get_allocator() const - { - return *this; - } - }; - - template <typename T, std::size_t SIZE, typename Allocator> - void MemoryBuffer<T, SIZE, Allocator>::grow(std::size_t size) - { - std::size_t new_capacity = this->capacity_ + this->capacity_ / 2; - if (size > new_capacity) - new_capacity = size; - T *new_ptr = this->allocate(new_capacity, FMT_NULL); - // The following code doesn't throw, so the raw pointer above doesn't leak. - std::uninitialized_copy(this->ptr_, this->ptr_ + this->size_, - make_ptr(new_ptr, new_capacity)); - std::size_t old_capacity = this->capacity_; - T *old_ptr = this->ptr_; - this->capacity_ = new_capacity; - this->ptr_ = new_ptr; - // deallocate may throw (at least in principle), but it doesn't matter since - // the buffer already uses the new storage and will deallocate it in case - // of exception. - if (old_ptr != data_) - Allocator::deallocate(old_ptr, old_capacity); - } - - // A fixed-size buffer. - template <typename Char> - class FixedBuffer: public fmt::Buffer<Char> - { - public: - FixedBuffer(Char *array, std::size_t size): fmt::Buffer<Char>(array, size) - {} - - protected: - FMT_API void grow(std::size_t size) FMT_OVERRIDE; - }; - - template <typename Char> - class BasicCharTraits - { - public: + // Returns a copy of the allocator associated with this buffer. + Allocator get_allocator() const + { + return *this; + } +}; + +template <typename T, std::size_t SIZE, typename Allocator> +void MemoryBuffer<T, SIZE, Allocator>::grow(std::size_t size) +{ + std::size_t new_capacity = this->capacity_ + this->capacity_ / 2; + if (size > new_capacity) + new_capacity = size; + T *new_ptr = this->allocate(new_capacity, FMT_NULL); + // The following code doesn't throw, so the raw pointer above doesn't leak. + std::uninitialized_copy(this->ptr_, this->ptr_ + this->size_, + make_ptr(new_ptr, new_capacity)); + std::size_t old_capacity = this->capacity_; + T *old_ptr = this->ptr_; + this->capacity_ = new_capacity; + this->ptr_ = new_ptr; + // deallocate may throw (at least in principle), but it doesn't matter since + // the buffer already uses the new storage and will deallocate it in case + // of exception. + if (old_ptr != data_) + Allocator::deallocate(old_ptr, old_capacity); +} + +// A fixed-size buffer. +template <typename Char> +class FixedBuffer: public fmt::Buffer<Char> +{ +public: + FixedBuffer(Char *array, std::size_t size): fmt::Buffer<Char>(array, size) + {} + +protected: + FMT_API void grow(std::size_t size) FMT_OVERRIDE; +}; + +template <typename Char> +class BasicCharTraits +{ +public: #if FMT_SECURE_SCL - typedef stdext::checked_array_iterator<Char*> CharPtr; + typedef stdext::checked_array_iterator<Char*> CharPtr; #else - typedef Char *CharPtr; + typedef Char *CharPtr; #endif - static Char cast(int value) - { - return static_cast<Char>(value); - } - }; - - template <typename Char> - class CharTraits; - - template <> - class CharTraits<char>: public BasicCharTraits<char> - { - private: - // Conversion from wchar_t to char is not allowed. - static char convert(wchar_t); - - public: - static char convert(char value) - { - return value; - } - - // Formats a floating-point number. - template <typename T> - FMT_API static int format_float(char *buffer, std::size_t size, - const char *format, unsigned width, int precision, T value); - }; + static Char cast(int value) + { + return static_cast<Char>(value); + } +}; + +template <typename Char> +class CharTraits; + +template <> +class CharTraits<char>: public BasicCharTraits<char> +{ +private: + // Conversion from wchar_t to char is not allowed. + static char convert(wchar_t); + +public: + static char convert(char value) + { + return value; + } + + // Formats a floating-point number. + template <typename T> + FMT_API static int format_float(char *buffer, std::size_t size, + const char *format, unsigned width, int precision, T value); +}; #if FMT_USE_EXTERN_TEMPLATES - extern template int CharTraits<char>::format_float<double> - (char *buffer, std::size_t size, - const char* format, unsigned width, int precision, double value); - extern template int CharTraits<char>::format_float<long double> - (char *buffer, std::size_t size, - const char* format, unsigned width, int precision, long double value); +extern template int CharTraits<char>::format_float<double> +(char *buffer, std::size_t size, + const char* format, unsigned width, int precision, double value); +extern template int CharTraits<char>::format_float<long double> +(char *buffer, std::size_t size, + const char* format, unsigned width, int precision, long double value); #endif - template <> - class CharTraits<wchar_t>: public BasicCharTraits<wchar_t> - { - public: - static wchar_t convert(char value) - { - return value; - } - static wchar_t convert(wchar_t value) - { - return value; - } - - template <typename T> - FMT_API static int format_float(wchar_t *buffer, std::size_t size, - const wchar_t *format, unsigned width, int precision, T value); - }; +template <> +class CharTraits<wchar_t>: public BasicCharTraits<wchar_t> +{ +public: + static wchar_t convert(char value) + { + return value; + } + static wchar_t convert(wchar_t value) + { + return value; + } + + template <typename T> + FMT_API static int format_float(wchar_t *buffer, std::size_t size, + const wchar_t *format, unsigned width, int precision, T value); +}; #if FMT_USE_EXTERN_TEMPLATES - extern template int CharTraits<wchar_t>::format_float<double> - (wchar_t *buffer, std::size_t size, - const wchar_t* format, unsigned width, int precision, double value); - extern template int CharTraits<wchar_t>::format_float<long double> - (wchar_t *buffer, std::size_t size, - const wchar_t* format, unsigned width, int precision, long double value); +extern template int CharTraits<wchar_t>::format_float<double> +(wchar_t *buffer, std::size_t size, + const wchar_t* format, unsigned width, int precision, double value); +extern template int CharTraits<wchar_t>::format_float<long double> +(wchar_t *buffer, std::size_t size, + const wchar_t* format, unsigned width, int precision, long double value); #endif - // Checks if a number is negative - used to avoid warnings. - template <bool IsSigned> - struct SignChecker - { - template <typename T> - static bool is_negative(T value) - { - return value < 0; - } - }; - - template <> - struct SignChecker<false> - { - template <typename T> - static bool is_negative(T) - { - return false; - } - }; - - // Returns true if value is negative, false otherwise. - // Same as (value < 0) but doesn't produce warnings if T is an unsigned type. - template <typename T> - inline bool is_negative(T value) - { - return SignChecker<std::numeric_limits<T>::is_signed>::is_negative(value); - } - - // Selects uint32_t if FitsIn32Bits is true, uint64_t otherwise. - template <bool FitsIn32Bits> - struct TypeSelector - { - typedef uint32_t Type; - }; - - template <> - struct TypeSelector<false> - { - typedef uint64_t Type; - }; - - template <typename T> - struct IntTraits - { - // Smallest of uint32_t and uint64_t that is large enough to represent - // all values of T. - typedef typename - TypeSelector<std::numeric_limits<T>::digits <= 32>::Type MainType; - }; - - FMT_API void report_unknown_type(char code, const char *type); - - // Static data is placed in this class template to allow header-only - // configuration. - template <typename T = void> - struct FMT_API BasicData - { - static const uint32_t POWERS_OF_10_32[]; - static const uint64_t POWERS_OF_10_64[]; - static const char DIGITS[]; - }; +// Checks if a number is negative - used to avoid warnings. +template <bool IsSigned> +struct SignChecker +{ + template <typename T> + static bool is_negative(T value) + { + return value < 0; + } +}; + +template <> +struct SignChecker<false> +{ + template <typename T> + static bool is_negative(T) + { + return false; + } +}; + +// Returns true if value is negative, false otherwise. +// Same as (value < 0) but doesn't produce warnings if T is an unsigned type. +template <typename T> +inline bool is_negative(T value) +{ + return SignChecker<std::numeric_limits<T>::is_signed>::is_negative(value); +} + +// Selects uint32_t if FitsIn32Bits is true, uint64_t otherwise. +template <bool FitsIn32Bits> +struct TypeSelector +{ + typedef uint32_t Type; +}; + +template <> +struct TypeSelector<false> +{ + typedef uint64_t Type; +}; + +template <typename T> +struct IntTraits +{ + // Smallest of uint32_t and uint64_t that is large enough to represent + // all values of T. + typedef typename + TypeSelector<std::numeric_limits<T>::digits <= 32>::Type MainType; +}; + +FMT_API void report_unknown_type(char code, const char *type); + +// Static data is placed in this class template to allow header-only +// configuration. +template <typename T = void> +struct FMT_API BasicData +{ + static const uint32_t POWERS_OF_10_32[]; + static const uint64_t POWERS_OF_10_64[]; + static const char DIGITS[]; +}; #if FMT_USE_EXTERN_TEMPLATES - extern template struct BasicData<void>; +extern template struct BasicData<void>; #endif - typedef BasicData<> Data; +typedef BasicData<> Data; #ifdef FMT_BUILTIN_CLZLL - // Returns the number of decimal digits in n. Leading zeros are not counted - // except for n == 0 in which case count_digits returns 1. - inline unsigned count_digits(uint64_t n) - { - // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10 - // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits. - int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12; - return to_unsigned(t) - (n < Data::POWERS_OF_10_64[t]) + 1; - } +// Returns the number of decimal digits in n. Leading zeros are not counted +// except for n == 0 in which case count_digits returns 1. +inline unsigned count_digits(uint64_t n) +{ + // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10 + // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits. + int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12; + return to_unsigned(t) - (n < Data::POWERS_OF_10_64[t]) + 1; +} #else - // Fallback version of count_digits used when __builtin_clz is not available. - inline unsigned count_digits(uint64_t n) - { - unsigned count = 1; - for (;;) { - // Integer division is slow so do it for a group of four digits instead - // of for every digit. The idea comes from the talk by Alexandrescu - // "Three Optimization Tips for C++". See speed-test for a comparison. - if (n < 10) return count; - if (n < 100) return count + 1; - if (n < 1000) return count + 2; - if (n < 10000) return count + 3; - n /= 10000u; - count += 4; - } - } +// Fallback version of count_digits used when __builtin_clz is not available. +inline unsigned count_digits(uint64_t n) +{ + unsigned count = 1; + for (;;) + { + // Integer division is slow so do it for a group of four digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + if (n < 10) return count; + if (n < 100) return count + 1; + if (n < 1000) return count + 2; + if (n < 10000) return count + 3; + n /= 10000u; + count += 4; + } +} #endif #ifdef FMT_BUILTIN_CLZ - // Optional version of count_digits for better performance on 32-bit platforms. - inline unsigned count_digits(uint32_t n) - { - int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12; - return to_unsigned(t) - (n < Data::POWERS_OF_10_32[t]) + 1; - } +// Optional version of count_digits for better performance on 32-bit platforms. +inline unsigned count_digits(uint32_t n) +{ + int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12; + return to_unsigned(t) - (n < Data::POWERS_OF_10_32[t]) + 1; +} #endif - // A functor that doesn't add a thousands separator. - struct NoThousandsSep - { - template <typename Char> - void operator()(Char *) - {} - }; - - // A functor that adds a thousands separator. - class ThousandsSep - { - private: - fmt::StringRef sep_; - - // Index of a decimal digit with the least significant digit having index 0. - unsigned digit_index_; - - public: - explicit ThousandsSep(fmt::StringRef sep): sep_(sep), digit_index_(0) - {} - - template <typename Char> - void operator()(Char *&buffer) - { - if (++digit_index_ % 3 != 0) - return; - buffer -= sep_.size(); - std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(), - internal::make_ptr(buffer, sep_.size())); - } - }; - - // Formats a decimal unsigned integer value writing into buffer. - // thousands_sep is a functor that is called after writing each char to - // add a thousands separator if necessary. - template <typename UInt, typename Char, typename ThousandsSep> - inline void format_decimal(Char *buffer, UInt value, unsigned num_digits, - ThousandsSep thousands_sep) - { - buffer += num_digits; - while (value >= 100) { - // Integer division is slow so do it for a group of two digits instead - // of for every digit. The idea comes from the talk by Alexandrescu - // "Three Optimization Tips for C++". See speed-test for a comparison. - unsigned index = static_cast<unsigned>((value % 100) * 2); - value /= 100; - *--buffer = Data::DIGITS[index + 1]; - thousands_sep(buffer); - *--buffer = Data::DIGITS[index]; - thousands_sep(buffer); - } - if (value < 10) { - *--buffer = static_cast<char>('0' + value); - return; - } - unsigned index = static_cast<unsigned>(value * 2); - *--buffer = Data::DIGITS[index + 1]; - thousands_sep(buffer); - *--buffer = Data::DIGITS[index]; - } - - template <typename UInt, typename Char> - inline void format_decimal(Char *buffer, UInt value, unsigned num_digits) - { - format_decimal(buffer, value, num_digits, NoThousandsSep()); - return; - } +// A functor that doesn't add a thousands separator. +struct NoThousandsSep +{ + template <typename Char> + void operator()(Char *) + {} +}; + +// A functor that adds a thousands separator. +class ThousandsSep +{ +private: + fmt::StringRef sep_; + + // Index of a decimal digit with the least significant digit having index 0. + unsigned digit_index_; + +public: + explicit ThousandsSep(fmt::StringRef sep): sep_(sep), digit_index_(0) + {} + + template <typename Char> + void operator()(Char *&buffer) + { + if (++digit_index_ % 3 != 0) + return; + buffer -= sep_.size(); + std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(), + internal::make_ptr(buffer, sep_.size())); + } +}; + +// Formats a decimal unsigned integer value writing into buffer. +// thousands_sep is a functor that is called after writing each char to +// add a thousands separator if necessary. +template <typename UInt, typename Char, typename ThousandsSep> +inline void format_decimal(Char *buffer, UInt value, unsigned num_digits, + ThousandsSep thousands_sep) +{ + buffer += num_digits; + while (value >= 100) + { + // Integer division is slow so do it for a group of two digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + unsigned index = static_cast<unsigned>((value % 100) * 2); + value /= 100; + *--buffer = Data::DIGITS[index + 1]; + thousands_sep(buffer); + *--buffer = Data::DIGITS[index]; + thousands_sep(buffer); + } + if (value < 10) + { + *--buffer = static_cast<char>('0' + value); + return; + } + unsigned index = static_cast<unsigned>(value * 2); + *--buffer = Data::DIGITS[index + 1]; + thousands_sep(buffer); + *--buffer = Data::DIGITS[index]; +} + +template <typename UInt, typename Char> +inline void format_decimal(Char *buffer, UInt value, unsigned num_digits) +{ + format_decimal(buffer, value, num_digits, NoThousandsSep()); + return; +} #ifndef _WIN32 # define FMT_USE_WINDOWS_H 0 @@ -1164,282 +1180,282 @@ namespace fmt { # define FMT_USE_WINDOWS_H 1 #endif - // Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h. - // All the functionality that relies on it will be disabled too. +// Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h. +// All the functionality that relies on it will be disabled too. #if FMT_USE_WINDOWS_H - // A converter from UTF-8 to UTF-16. - // It is only provided for Windows since other systems support UTF-8 natively. - class UTF8ToUTF16 - { - private: - MemoryBuffer<wchar_t, INLINE_BUFFER_SIZE> buffer_; - - public: - FMT_API explicit UTF8ToUTF16(StringRef s); - operator WStringRef() const - { - return WStringRef(&buffer_[0], size()); - } - size_t size() const - { - return buffer_.size() - 1; - } - const wchar_t *c_str() const - { - return &buffer_[0]; - } - std::wstring str() const - { - return std::wstring(&buffer_[0], size()); - } - }; - - // A converter from UTF-16 to UTF-8. - // It is only provided for Windows since other systems support UTF-8 natively. - class UTF16ToUTF8 - { - private: - MemoryBuffer<char, INLINE_BUFFER_SIZE> buffer_; - - public: - UTF16ToUTF8() - {} - FMT_API explicit UTF16ToUTF8(WStringRef s); - operator StringRef() const - { - return StringRef(&buffer_[0], size()); - } - size_t size() const - { - return buffer_.size() - 1; - } - const char *c_str() const - { - return &buffer_[0]; - } - std::string str() const - { - return std::string(&buffer_[0], size()); - } - - // Performs conversion returning a system error code instead of - // throwing exception on conversion error. This method may still throw - // in case of memory allocation error. - FMT_API int convert(WStringRef s); - }; - - FMT_API void format_windows_error(fmt::Writer &out, int error_code, - fmt::StringRef message) FMT_NOEXCEPT; +// A converter from UTF-8 to UTF-16. +// It is only provided for Windows since other systems support UTF-8 natively. +class UTF8ToUTF16 +{ +private: + MemoryBuffer<wchar_t, INLINE_BUFFER_SIZE> buffer_; + +public: + FMT_API explicit UTF8ToUTF16(StringRef s); + operator WStringRef() const + { + return WStringRef(&buffer_[0], size()); + } + size_t size() const + { + return buffer_.size() - 1; + } + const wchar_t *c_str() const + { + return &buffer_[0]; + } + std::wstring str() const + { + return std::wstring(&buffer_[0], size()); + } +}; + +// A converter from UTF-16 to UTF-8. +// It is only provided for Windows since other systems support UTF-8 natively. +class UTF16ToUTF8 +{ +private: + MemoryBuffer<char, INLINE_BUFFER_SIZE> buffer_; + +public: + UTF16ToUTF8() + {} + FMT_API explicit UTF16ToUTF8(WStringRef s); + operator StringRef() const + { + return StringRef(&buffer_[0], size()); + } + size_t size() const + { + return buffer_.size() - 1; + } + const char *c_str() const + { + return &buffer_[0]; + } + std::string str() const + { + return std::string(&buffer_[0], size()); + } + + // Performs conversion returning a system error code instead of + // throwing exception on conversion error. This method may still throw + // in case of memory allocation error. + FMT_API int convert(WStringRef s); +}; + +FMT_API void format_windows_error(fmt::Writer &out, int error_code, + fmt::StringRef message) FMT_NOEXCEPT; #endif - // A formatting argument value. - struct Value - { - template <typename Char> - struct StringValue - { - const Char *value; - std::size_t size; - }; - - typedef void(*FormatFunc)( - void *formatter, const void *arg, void *format_str_ptr); - - struct CustomValue - { - const void *value; - FormatFunc format; - }; - - union - { - int int_value; - unsigned uint_value; - LongLong long_long_value; - ULongLong ulong_long_value; - double double_value; - long double long_double_value; - const void *pointer; - StringValue<char> string; - StringValue<signed char> sstring; - StringValue<unsigned char> ustring; - StringValue<wchar_t> wstring; - CustomValue custom; - }; - - enum Type - { - NONE, NAMED_ARG, - // Integer types should go first, - INT, UINT, LONG_LONG, ULONG_LONG, BOOL, CHAR, LAST_INTEGER_TYPE = CHAR, - // followed by floating-point types. - DOUBLE, LONG_DOUBLE, LAST_NUMERIC_TYPE = LONG_DOUBLE, - CSTRING, STRING, WSTRING, POINTER, CUSTOM - }; - }; - - // A formatting argument. It is a trivially copyable/constructible type to - // allow storage in internal::MemoryBuffer. - struct Arg: Value - { - Type type; - }; - - template <typename Char> - struct NamedArg; - template <typename Char, typename T> - struct NamedArgWithType; - - template <typename T = void> - struct Null - {}; - - // A helper class template to enable or disable overloads taking wide - // characters and strings in MakeValue. - template <typename T, typename Char> - struct WCharHelper - { - typedef Null<T> Supported; - typedef T Unsupported; - }; - - template <typename T> - struct WCharHelper<T, wchar_t> - { - typedef T Supported; - typedef Null<T> Unsupported; - }; - - typedef char Yes[1]; - typedef char No[2]; - - template <typename T> - T &get(); - - // These are non-members to workaround an overload resolution bug in bcc32. - Yes &convert(fmt::ULongLong); - No &convert(...); - - template<typename T, bool ENABLE_CONVERSION> - struct ConvertToIntImpl - { - enum - { - value = ENABLE_CONVERSION - }; - }; - - template<typename T, bool ENABLE_CONVERSION> - struct ConvertToIntImpl2 - { - enum - { - value = false - }; - }; - - template<typename T> - struct ConvertToIntImpl2<T, true> - { - enum - { - // Don't convert numeric types. - value = ConvertToIntImpl<T, !std::numeric_limits<T>::is_specialized>::value - }; - }; - - template<typename T> - struct ConvertToInt - { - enum - { - enable_conversion = sizeof(convert(get<T>())) == sizeof(Yes) - }; - enum - { - value = ConvertToIntImpl2<T, enable_conversion>::value - }; - }; +// A formatting argument value. +struct Value +{ + template <typename Char> + struct StringValue + { + const Char *value; + std::size_t size; + }; + + typedef void(*FormatFunc)( + void *formatter, const void *arg, void *format_str_ptr); + + struct CustomValue + { + const void *value; + FormatFunc format; + }; + + union + { + int int_value; + unsigned uint_value; + LongLong long_long_value; + ULongLong ulong_long_value; + double double_value; + long double long_double_value; + const void *pointer; + StringValue<char> string; + StringValue<signed char> sstring; + StringValue<unsigned char> ustring; + StringValue<wchar_t> wstring; + CustomValue custom; + }; + + enum Type + { + NONE, NAMED_ARG, + // Integer types should go first, + INT, UINT, LONG_LONG, ULONG_LONG, BOOL, CHAR, LAST_INTEGER_TYPE = CHAR, + // followed by floating-point types. + DOUBLE, LONG_DOUBLE, LAST_NUMERIC_TYPE = LONG_DOUBLE, + CSTRING, STRING, WSTRING, POINTER, CUSTOM + }; +}; + +// A formatting argument. It is a trivially copyable/constructible type to +// allow storage in internal::MemoryBuffer. +struct Arg: Value +{ + Type type; +}; + +template <typename Char> +struct NamedArg; +template <typename Char, typename T> +struct NamedArgWithType; + +template <typename T = void> +struct Null +{}; + +// A helper class template to enable or disable overloads taking wide +// characters and strings in MakeValue. +template <typename T, typename Char> +struct WCharHelper +{ + typedef Null<T> Supported; + typedef T Unsupported; +}; + +template <typename T> +struct WCharHelper<T, wchar_t> +{ + typedef T Supported; + typedef Null<T> Unsupported; +}; + +typedef char Yes[1]; +typedef char No[2]; + +template <typename T> +T &get(); + +// These are non-members to workaround an overload resolution bug in bcc32. +Yes &convert(fmt::ULongLong); +No &convert(...); + +template<typename T, bool ENABLE_CONVERSION> +struct ConvertToIntImpl +{ + enum + { + value = ENABLE_CONVERSION + }; +}; + +template<typename T, bool ENABLE_CONVERSION> +struct ConvertToIntImpl2 +{ + enum + { + value = false + }; +}; + +template<typename T> +struct ConvertToIntImpl2<T, true> +{ + enum + { + // Don't convert numeric types. + value = ConvertToIntImpl<T, !std::numeric_limits<T>::is_specialized>::value + }; +}; + +template<typename T> +struct ConvertToInt +{ + enum + { + enable_conversion = sizeof(convert(get<T>())) == sizeof(Yes) + }; + enum + { + value = ConvertToIntImpl2<T, enable_conversion>::value + }; +}; #define FMT_DISABLE_CONVERSION_TO_INT(Type) \ template <> \ struct ConvertToInt<Type> { enum { value = 0 }; } - // Silence warnings about convering float to int. - FMT_DISABLE_CONVERSION_TO_INT(float); - FMT_DISABLE_CONVERSION_TO_INT(double); - FMT_DISABLE_CONVERSION_TO_INT(long double); - - template<bool B, class T = void> - struct EnableIf - {}; - - template<class T> - struct EnableIf<true, T> - { - typedef T type; - }; - - template<bool B, class T, class F> - struct Conditional - { - typedef T type; - }; - - template<class T, class F> - struct Conditional<false, T, F> - { - typedef F type; - }; - - // For bcc32 which doesn't understand ! in template arguments. - template <bool> - struct Not - { - enum - { - value = 0 - }; - }; - - template <> - struct Not<false> - { - enum - { - value = 1 - }; - }; - - template <typename T> - struct False - { - enum - { - value = 0 - }; - }; - - template <typename T, T> struct LConvCheck - { - LConvCheck(int) - {} - }; - - // Returns the thousands separator for the current locale. - // We check if ``lconv`` contains ``thousands_sep`` because on Android - // ``lconv`` is stubbed as an empty struct. - template <typename LConv> - inline StringRef thousands_sep( - LConv *lc, LConvCheck<char *LConv::*, &LConv::thousands_sep> = 0) - { - return lc->thousands_sep; - } - - inline fmt::StringRef thousands_sep(...) - { - return ""; - } +// Silence warnings about convering float to int. +FMT_DISABLE_CONVERSION_TO_INT(float); +FMT_DISABLE_CONVERSION_TO_INT(double); +FMT_DISABLE_CONVERSION_TO_INT(long double); + +template<bool B, class T = void> +struct EnableIf +{}; + +template<class T> +struct EnableIf<true, T> +{ + typedef T type; +}; + +template<bool B, class T, class F> +struct Conditional +{ + typedef T type; +}; + +template<class T, class F> +struct Conditional<false, T, F> +{ + typedef F type; +}; + +// For bcc32 which doesn't understand ! in template arguments. +template <bool> +struct Not +{ + enum + { + value = 0 + }; +}; + +template <> +struct Not<false> +{ + enum + { + value = 1 + }; +}; + +template <typename T> +struct False +{ + enum + { + value = 0 + }; +}; + +template <typename T, T> struct LConvCheck +{ + LConvCheck(int) + {} +}; + +// Returns the thousands separator for the current locale. +// We check if ``lconv`` contains ``thousands_sep`` because on Android +// ``lconv`` is stubbed as an empty struct. +template <typename LConv> +inline StringRef thousands_sep( + LConv *lc, LConvCheck<char *LConv::*, &LConv::thousands_sep> = 0) +{ + return lc->thousands_sep; +} + +inline fmt::StringRef thousands_sep(...) +{ + return ""; +} #define FMT_CONCAT(a, b) a##b @@ -1462,70 +1478,70 @@ namespace fmt { typedef int FMT_CONCAT_(Assert, __LINE__)[(cond) ? 1 : -1] FMT_UNUSED #endif - template <typename Formatter, typename Char, typename T> - void format_arg(Formatter &, const Char *, const T &) - { - FMT_STATIC_ASSERT(False<T>::value, - "Cannot format argument. To enable the use of ostream " - "operator<< include fmt/ostream.h. Otherwise provide " - "an overload of format_arg."); - } - - // Makes an Arg object from any type. - template <typename Formatter> - class MakeValue: public Arg - { - public: - typedef typename Formatter::Char Char; - - private: - // The following two methods are private to disallow formatting of - // arbitrary pointers. If you want to output a pointer cast it to - // "void *" or "const void *". In particular, this forbids formatting - // of "[const] volatile char *" which is printed as bool by iostreams. - // Do not implement! - template <typename T> - MakeValue(const T *value); - template <typename T> - MakeValue(T *value); - - // The following methods are private to disallow formatting of wide - // characters and strings into narrow strings as in - // fmt::format("{}", L"test"); - // To fix this, use a wide format string: fmt::format(L"{}", L"test"). +template <typename Formatter, typename Char, typename T> +void format_arg(Formatter &, const Char *, const T &) +{ + FMT_STATIC_ASSERT(False<T>::value, + "Cannot format argument. To enable the use of ostream " + "operator<< include fmt/ostream.h. Otherwise provide " + "an overload of format_arg."); +} + +// Makes an Arg object from any type. +template <typename Formatter> +class MakeValue: public Arg +{ +public: + typedef typename Formatter::Char Char; + +private: + // The following two methods are private to disallow formatting of + // arbitrary pointers. If you want to output a pointer cast it to + // "void *" or "const void *". In particular, this forbids formatting + // of "[const] volatile char *" which is printed as bool by iostreams. + // Do not implement! + template <typename T> + MakeValue(const T *value); + template <typename T> + MakeValue(T *value); + + // The following methods are private to disallow formatting of wide + // characters and strings into narrow strings as in + // fmt::format("{}", L"test"); + // To fix this, use a wide format string: fmt::format(L"{}", L"test"). #if !FMT_MSC_VER || defined(_NATIVE_WCHAR_T_DEFINED) - MakeValue(typename WCharHelper<wchar_t, Char>::Unsupported); + MakeValue(typename WCharHelper<wchar_t, Char>::Unsupported); #endif - MakeValue(typename WCharHelper<wchar_t *, Char>::Unsupported); - MakeValue(typename WCharHelper<const wchar_t *, Char>::Unsupported); - MakeValue(typename WCharHelper<const std::wstring &, Char>::Unsupported); - MakeValue(typename WCharHelper<WStringRef, Char>::Unsupported); - - void set_string(StringRef str) - { - string.value = str.data(); - string.size = str.size(); - } - - void set_string(WStringRef str) - { - wstring.value = str.data(); - wstring.size = str.size(); - } - - // Formats an argument of a custom type, such as a user-defined class. - template <typename T> - static void format_custom_arg( - void *formatter, const void *arg, void *format_str_ptr) - { - format_arg(*static_cast<Formatter*>(formatter), - *static_cast<const Char**>(format_str_ptr), - *static_cast<const T*>(arg)); - } - - public: - MakeValue() - {} + MakeValue(typename WCharHelper<wchar_t *, Char>::Unsupported); + MakeValue(typename WCharHelper<const wchar_t *, Char>::Unsupported); + MakeValue(typename WCharHelper<const std::wstring &, Char>::Unsupported); + MakeValue(typename WCharHelper<WStringRef, Char>::Unsupported); + + void set_string(StringRef str) + { + string.value = str.data(); + string.size = str.size(); + } + + void set_string(WStringRef str) + { + wstring.value = str.data(); + wstring.size = str.size(); + } + + // Formats an argument of a custom type, such as a user-defined class. + template <typename T> + static void format_custom_arg( + void *formatter, const void *arg, void *format_str_ptr) + { + format_arg(*static_cast<Formatter*>(formatter), + *static_cast<const Char**>(format_str_ptr), + *static_cast<const T*>(arg)); + } + +public: + MakeValue() + {} #define FMT_MAKE_VALUE_(Type, field, TYPE, rhs) \ MakeValue(Type value) { field = rhs; } \ @@ -1534,72 +1550,72 @@ namespace fmt { #define FMT_MAKE_VALUE(Type, field, TYPE) \ FMT_MAKE_VALUE_(Type, field, TYPE, value) - FMT_MAKE_VALUE(bool, int_value, BOOL) - FMT_MAKE_VALUE(short, int_value, INT) - FMT_MAKE_VALUE(unsigned short, uint_value, UINT) - FMT_MAKE_VALUE(int, int_value, INT) - FMT_MAKE_VALUE(unsigned, uint_value, UINT) - - MakeValue(long value) - { - // To minimize the number of types we need to deal with, long is - // translated either to int or to long long depending on its size. - if (const_check(sizeof(long) == sizeof(int))) - int_value = static_cast<int>(value); - else - long_long_value = value; - } - static uint64_t type(long) - { - return sizeof(long) == sizeof(int) ? Arg::INT : Arg::LONG_LONG; - } - - MakeValue(unsigned long value) - { - if (const_check(sizeof(unsigned long) == sizeof(unsigned))) - uint_value = static_cast<unsigned>(value); - else - ulong_long_value = value; - } - static uint64_t type(unsigned long) - { - return sizeof(unsigned long) == sizeof(unsigned) ? - Arg::UINT : Arg::ULONG_LONG; - } - - FMT_MAKE_VALUE(LongLong, long_long_value, LONG_LONG) - FMT_MAKE_VALUE(ULongLong, ulong_long_value, ULONG_LONG) - FMT_MAKE_VALUE(float, double_value, DOUBLE) - FMT_MAKE_VALUE(double, double_value, DOUBLE) - FMT_MAKE_VALUE(long double, long_double_value, LONG_DOUBLE) - FMT_MAKE_VALUE(signed char, int_value, INT) - FMT_MAKE_VALUE(unsigned char, uint_value, UINT) - FMT_MAKE_VALUE(char, int_value, CHAR) + FMT_MAKE_VALUE(bool, int_value, BOOL) + FMT_MAKE_VALUE(short, int_value, INT) + FMT_MAKE_VALUE(unsigned short, uint_value, UINT) + FMT_MAKE_VALUE(int, int_value, INT) + FMT_MAKE_VALUE(unsigned, uint_value, UINT) + + MakeValue(long value) + { + // To minimize the number of types we need to deal with, long is + // translated either to int or to long long depending on its size. + if (const_check(sizeof(long) == sizeof(int))) + int_value = static_cast<int>(value); + else + long_long_value = value; + } + static uint64_t type(long) + { + return sizeof(long) == sizeof(int) ? Arg::INT : Arg::LONG_LONG; + } + + MakeValue(unsigned long value) + { + if (const_check(sizeof(unsigned long) == sizeof(unsigned))) + uint_value = static_cast<unsigned>(value); + else + ulong_long_value = value; + } + static uint64_t type(unsigned long) + { + return sizeof(unsigned long) == sizeof(unsigned) ? + Arg::UINT : Arg::ULONG_LONG; + } + + FMT_MAKE_VALUE(LongLong, long_long_value, LONG_LONG) + FMT_MAKE_VALUE(ULongLong, ulong_long_value, ULONG_LONG) + FMT_MAKE_VALUE(float, double_value, DOUBLE) + FMT_MAKE_VALUE(double, double_value, DOUBLE) + FMT_MAKE_VALUE(long double, long_double_value, LONG_DOUBLE) + FMT_MAKE_VALUE(signed char, int_value, INT) + FMT_MAKE_VALUE(unsigned char, uint_value, UINT) + FMT_MAKE_VALUE(char, int_value, CHAR) #if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED) - MakeValue(typename WCharHelper<wchar_t, Char>::Supported value) - { - int_value = value; - } - static uint64_t type(wchar_t) - { - return Arg::CHAR; - } + MakeValue(typename WCharHelper<wchar_t, Char>::Supported value) + { + int_value = value; + } + static uint64_t type(wchar_t) + { + return Arg::CHAR; + } #endif #define FMT_MAKE_STR_VALUE(Type, TYPE) \ MakeValue(Type value) { set_string(value); } \ static uint64_t type(Type) { return Arg::TYPE; } - FMT_MAKE_VALUE(char *, string.value, CSTRING) - FMT_MAKE_VALUE(const char *, string.value, CSTRING) - FMT_MAKE_VALUE(signed char *, sstring.value, CSTRING) - FMT_MAKE_VALUE(const signed char *, sstring.value, CSTRING) - FMT_MAKE_VALUE(unsigned char *, ustring.value, CSTRING) - FMT_MAKE_VALUE(const unsigned char *, ustring.value, CSTRING) - FMT_MAKE_STR_VALUE(const std::string &, STRING) - FMT_MAKE_STR_VALUE(StringRef, STRING) - FMT_MAKE_VALUE_(CStringRef, string.value, CSTRING, value.c_str()) + FMT_MAKE_VALUE(char *, string.value, CSTRING) + FMT_MAKE_VALUE(const char *, string.value, CSTRING) + FMT_MAKE_VALUE(signed char *, sstring.value, CSTRING) + FMT_MAKE_VALUE(const signed char *, sstring.value, CSTRING) + FMT_MAKE_VALUE(unsigned char *, ustring.value, CSTRING) + FMT_MAKE_VALUE(const unsigned char *, ustring.value, CSTRING) + FMT_MAKE_STR_VALUE(const std::string &, STRING) + FMT_MAKE_STR_VALUE(StringRef, STRING) + FMT_MAKE_VALUE_(CStringRef, string.value, CSTRING, value.c_str()) #define FMT_MAKE_WSTR_VALUE(Type, TYPE) \ MakeValue(typename WCharHelper<Type, Char>::Supported value) { \ @@ -1607,583 +1623,587 @@ namespace fmt { } \ static uint64_t type(Type) { return Arg::TYPE; } - FMT_MAKE_WSTR_VALUE(wchar_t *, WSTRING) - FMT_MAKE_WSTR_VALUE(const wchar_t *, WSTRING) - FMT_MAKE_WSTR_VALUE(const std::wstring &, WSTRING) - FMT_MAKE_WSTR_VALUE(WStringRef, WSTRING) - - FMT_MAKE_VALUE(void *, pointer, POINTER) - FMT_MAKE_VALUE(const void *, pointer, POINTER) - - template <typename T> - MakeValue(const T &value, - typename EnableIf<Not< - ConvertToInt<T>::value>::value, int>::type = 0) - { - custom.value = &value; - custom.format = &format_custom_arg<T>; - } - - template <typename T> - MakeValue(const T &value, - typename EnableIf<ConvertToInt<T>::value, int>::type = 0) - { - int_value = value; - } - - template <typename T> - static uint64_t type(const T &) - { - return ConvertToInt<T>::value ? Arg::INT : Arg::CUSTOM; - } - - // Additional template param `Char_` is needed here because make_type always - // uses char. - template <typename Char_> - MakeValue(const NamedArg<Char_> &value) - { - pointer = &value; - } - template <typename Char_, typename T> - MakeValue(const NamedArgWithType<Char_, T> &value) - { - pointer = &value; - } - - template <typename Char_> - static uint64_t type(const NamedArg<Char_> &) - { - return Arg::NAMED_ARG; - } - template <typename Char_, typename T> - static uint64_t type(const NamedArgWithType<Char_, T> &) - { - return Arg::NAMED_ARG; - } - }; - - template <typename Formatter> - class MakeArg: public Arg - { - public: - MakeArg() - { - type = Arg::NONE; - } - - template <typename T> - MakeArg(const T &value) - : Arg(MakeValue<Formatter>(value)) - { - type = static_cast<Arg::Type>(MakeValue<Formatter>::type(value)); - } - }; - - template <typename Char> - struct NamedArg: Arg - { - BasicStringRef<Char> name; - - template <typename T> - NamedArg(BasicStringRef<Char> argname, const T &value) - : Arg(MakeArg< BasicFormatter<Char> >(value)), name(argname) - {} - }; - - template <typename Char, typename T> - struct NamedArgWithType: NamedArg<Char> - { - NamedArgWithType(BasicStringRef<Char> argname, const T &value) - : NamedArg<Char>(argname, value) - {} - }; - - class RuntimeError: public std::runtime_error - { - protected: - RuntimeError(): std::runtime_error("") - {} - RuntimeError(const RuntimeError &rerr): std::runtime_error(rerr) - {} - ~RuntimeError() FMT_DTOR_NOEXCEPT; - }; - - template <typename Char> - class ArgMap; - } // namespace internal - - /** An argument list. */ - class ArgList - { - private: - // To reduce compiled code size per formatting function call, types of first - // MAX_PACKED_ARGS arguments are passed in the types_ field. - uint64_t types_; - union - { - // If the number of arguments is less than MAX_PACKED_ARGS, the argument - // values are stored in values_, otherwise they are stored in args_. - // This is done to reduce compiled code size as storing larger objects - // may require more code (at least on x86-64) even if the same amount of - // data is actually copied to stack. It saves ~10% on the bloat test. - const internal::Value *values_; - const internal::Arg *args_; - }; - - internal::Arg::Type type(unsigned index) const - { - return type(types_, index); - } - - template <typename Char> - friend class internal::ArgMap; - - public: - // Maximum number of arguments with packed types. - enum - { - MAX_PACKED_ARGS = 16 - }; - - ArgList(): types_(0) - {} - - ArgList(ULongLong types, const internal::Value *values) - : types_(types), values_(values) - {} - ArgList(ULongLong types, const internal::Arg *args) - : types_(types), args_(args) - {} - - uint64_t types() const - { - return types_; - } - - /** Returns the argument at specified index. */ - internal::Arg operator[](unsigned index) const - { - using internal::Arg; - Arg arg; - bool use_values = type(MAX_PACKED_ARGS - 1) == Arg::NONE; - if (index < MAX_PACKED_ARGS) { - Arg::Type arg_type = type(index); - internal::Value &val = arg; - if (arg_type != Arg::NONE) - val = use_values ? values_[index] : args_[index]; - arg.type = arg_type; - return arg; - } - if (use_values) { - // The index is greater than the number of arguments that can be stored - // in values, so return a "none" argument. - arg.type = Arg::NONE; - return arg; - } - for (unsigned i = MAX_PACKED_ARGS; i <= index; ++i) { - if (args_[i].type == Arg::NONE) - return args_[i]; - } - return args_[index]; - } - - static internal::Arg::Type type(uint64_t types, unsigned index) - { - unsigned shift = index * 4; - uint64_t mask = 0xf; - return static_cast<internal::Arg::Type>( - (types & (mask << shift)) >> shift); - } - }; + FMT_MAKE_WSTR_VALUE(wchar_t *, WSTRING) + FMT_MAKE_WSTR_VALUE(const wchar_t *, WSTRING) + FMT_MAKE_WSTR_VALUE(const std::wstring &, WSTRING) + FMT_MAKE_WSTR_VALUE(WStringRef, WSTRING) + + FMT_MAKE_VALUE(void *, pointer, POINTER) + FMT_MAKE_VALUE(const void *, pointer, POINTER) + + template <typename T> + MakeValue(const T &value, + typename EnableIf<Not< + ConvertToInt<T>::value>::value, int>::type = 0) + { + custom.value = &value; + custom.format = &format_custom_arg<T>; + } + + template <typename T> + MakeValue(const T &value, + typename EnableIf<ConvertToInt<T>::value, int>::type = 0) + { + int_value = value; + } + + template <typename T> + static uint64_t type(const T &) + { + return ConvertToInt<T>::value ? Arg::INT : Arg::CUSTOM; + } + + // Additional template param `Char_` is needed here because make_type always + // uses char. + template <typename Char_> + MakeValue(const NamedArg<Char_> &value) + { + pointer = &value; + } + template <typename Char_, typename T> + MakeValue(const NamedArgWithType<Char_, T> &value) + { + pointer = &value; + } + + template <typename Char_> + static uint64_t type(const NamedArg<Char_> &) + { + return Arg::NAMED_ARG; + } + template <typename Char_, typename T> + static uint64_t type(const NamedArgWithType<Char_, T> &) + { + return Arg::NAMED_ARG; + } +}; + +template <typename Formatter> +class MakeArg: public Arg +{ +public: + MakeArg() + { + type = Arg::NONE; + } + + template <typename T> + MakeArg(const T &value) + : Arg(MakeValue<Formatter>(value)) + { + type = static_cast<Arg::Type>(MakeValue<Formatter>::type(value)); + } +}; + +template <typename Char> +struct NamedArg: Arg +{ + BasicStringRef<Char> name; + + template <typename T> + NamedArg(BasicStringRef<Char> argname, const T &value) + : Arg(MakeArg< BasicFormatter<Char> >(value)), name(argname) + {} +}; + +template <typename Char, typename T> +struct NamedArgWithType: NamedArg<Char> +{ + NamedArgWithType(BasicStringRef<Char> argname, const T &value) + : NamedArg<Char>(argname, value) + {} +}; + +class RuntimeError: public std::runtime_error +{ +protected: + RuntimeError(): std::runtime_error("") + {} + RuntimeError(const RuntimeError &rerr): std::runtime_error(rerr) + {} + ~RuntimeError() FMT_DTOR_NOEXCEPT; +}; + +template <typename Char> +class ArgMap; +} // namespace internal + +/** An argument list. */ +class ArgList +{ +private: + // To reduce compiled code size per formatting function call, types of first + // MAX_PACKED_ARGS arguments are passed in the types_ field. + uint64_t types_; + union + { + // If the number of arguments is less than MAX_PACKED_ARGS, the argument + // values are stored in values_, otherwise they are stored in args_. + // This is done to reduce compiled code size as storing larger objects + // may require more code (at least on x86-64) even if the same amount of + // data is actually copied to stack. It saves ~10% on the bloat test. + const internal::Value *values_; + const internal::Arg *args_; + }; + + internal::Arg::Type type(unsigned index) const + { + return type(types_, index); + } + + template <typename Char> + friend class internal::ArgMap; + +public: + // Maximum number of arguments with packed types. + enum + { + MAX_PACKED_ARGS = 16 + }; + + ArgList(): types_(0) + {} + + ArgList(ULongLong types, const internal::Value *values) + : types_(types), values_(values) + {} + ArgList(ULongLong types, const internal::Arg *args) + : types_(types), args_(args) + {} + + uint64_t types() const + { + return types_; + } + + /** Returns the argument at specified index. */ + internal::Arg operator[](unsigned index) const + { + using internal::Arg; + Arg arg; + bool use_values = type(MAX_PACKED_ARGS - 1) == Arg::NONE; + if (index < MAX_PACKED_ARGS) + { + Arg::Type arg_type = type(index); + internal::Value &val = arg; + if (arg_type != Arg::NONE) + val = use_values ? values_[index] : args_[index]; + arg.type = arg_type; + return arg; + } + if (use_values) + { + // The index is greater than the number of arguments that can be stored + // in values, so return a "none" argument. + arg.type = Arg::NONE; + return arg; + } + for (unsigned i = MAX_PACKED_ARGS; i <= index; ++i) + { + if (args_[i].type == Arg::NONE) + return args_[i]; + } + return args_[index]; + } + + static internal::Arg::Type type(uint64_t types, unsigned index) + { + unsigned shift = index * 4; + uint64_t mask = 0xf; + return static_cast<internal::Arg::Type>( + (types & (mask << shift)) >> shift); + } +}; #define FMT_DISPATCH(call) static_cast<Impl*>(this)->call - /** - \rst - An argument visitor based on the `curiously recurring template pattern - <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_. - - To use `~fmt::ArgVisitor` define a subclass that implements some or all of the - visit methods with the same signatures as the methods in `~fmt::ArgVisitor`, - for example, `~fmt::ArgVisitor::visit_int()`. - Pass the subclass as the *Impl* template parameter. Then calling - `~fmt::ArgVisitor::visit` for some argument will dispatch to a visit method - specific to the argument type. For example, if the argument type is - ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass - will be called. If the subclass doesn't contain a method with this signature, - then a corresponding method of `~fmt::ArgVisitor` will be called. - - **Example**:: - - class MyArgVisitor : public fmt::ArgVisitor<MyArgVisitor, void> { - public: - void visit_int(int value) { fmt::print("{}", value); } - void visit_double(double value) { fmt::print("{}", value ); } - }; - \endrst - */ - template <typename Impl, typename Result> - class ArgVisitor - { - private: - typedef internal::Arg Arg; - - public: - void report_unhandled_arg() - {} - - Result visit_unhandled_arg() - { - FMT_DISPATCH(report_unhandled_arg()); - return Result(); - } - - /** Visits an ``int`` argument. **/ - Result visit_int(int value) - { - return FMT_DISPATCH(visit_any_int(value)); - } - - /** Visits a ``long long`` argument. **/ - Result visit_long_long(LongLong value) - { - return FMT_DISPATCH(visit_any_int(value)); - } - - /** Visits an ``unsigned`` argument. **/ - Result visit_uint(unsigned value) - { - return FMT_DISPATCH(visit_any_int(value)); - } - - /** Visits an ``unsigned long long`` argument. **/ - Result visit_ulong_long(ULongLong value) - { - return FMT_DISPATCH(visit_any_int(value)); - } - - /** Visits a ``bool`` argument. **/ - Result visit_bool(bool value) - { - return FMT_DISPATCH(visit_any_int(value)); - } - - /** Visits a ``char`` or ``wchar_t`` argument. **/ - Result visit_char(int value) - { - return FMT_DISPATCH(visit_any_int(value)); - } - - /** Visits an argument of any integral type. **/ - template <typename T> - Result visit_any_int(T) - { - return FMT_DISPATCH(visit_unhandled_arg()); - } - - /** Visits a ``double`` argument. **/ - Result visit_double(double value) - { - return FMT_DISPATCH(visit_any_double(value)); - } - - /** Visits a ``long double`` argument. **/ - Result visit_long_double(long double value) - { - return FMT_DISPATCH(visit_any_double(value)); - } - - /** Visits a ``double`` or ``long double`` argument. **/ - template <typename T> - Result visit_any_double(T) - { - return FMT_DISPATCH(visit_unhandled_arg()); - } - - /** Visits a null-terminated C string (``const char *``) argument. **/ - Result visit_cstring(const char *) - { - return FMT_DISPATCH(visit_unhandled_arg()); - } - - /** Visits a string argument. **/ - Result visit_string(Arg::StringValue<char>) - { - return FMT_DISPATCH(visit_unhandled_arg()); - } - - /** Visits a wide string argument. **/ - Result visit_wstring(Arg::StringValue<wchar_t>) - { - return FMT_DISPATCH(visit_unhandled_arg()); - } - - /** Visits a pointer argument. **/ - Result visit_pointer(const void *) - { - return FMT_DISPATCH(visit_unhandled_arg()); - } - - /** Visits an argument of a custom (user-defined) type. **/ - Result visit_custom(Arg::CustomValue) - { - return FMT_DISPATCH(visit_unhandled_arg()); - } - - /** - \rst - Visits an argument dispatching to the appropriate visit method based on - the argument type. For example, if the argument type is ``double`` then - the `~fmt::ArgVisitor::visit_double()` method of the *Impl* class will be - called. - \endrst - */ - Result visit(const Arg &arg) - { - switch (arg.type) { - case Arg::NONE: - case Arg::NAMED_ARG: - FMT_ASSERT(false, "invalid argument type"); - break; - case Arg::INT: - return FMT_DISPATCH(visit_int(arg.int_value)); - case Arg::UINT: - return FMT_DISPATCH(visit_uint(arg.uint_value)); - case Arg::LONG_LONG: - return FMT_DISPATCH(visit_long_long(arg.long_long_value)); - case Arg::ULONG_LONG: - return FMT_DISPATCH(visit_ulong_long(arg.ulong_long_value)); - case Arg::BOOL: - return FMT_DISPATCH(visit_bool(arg.int_value != 0)); - case Arg::CHAR: - return FMT_DISPATCH(visit_char(arg.int_value)); - case Arg::DOUBLE: - return FMT_DISPATCH(visit_double(arg.double_value)); - case Arg::LONG_DOUBLE: - return FMT_DISPATCH(visit_long_double(arg.long_double_value)); - case Arg::CSTRING: - return FMT_DISPATCH(visit_cstring(arg.string.value)); - case Arg::STRING: - return FMT_DISPATCH(visit_string(arg.string)); - case Arg::WSTRING: - return FMT_DISPATCH(visit_wstring(arg.wstring)); - case Arg::POINTER: - return FMT_DISPATCH(visit_pointer(arg.pointer)); - case Arg::CUSTOM: - return FMT_DISPATCH(visit_custom(arg.custom)); - } - return Result(); - } - }; - - enum Alignment - { - ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC - }; - - // Flags. - enum - { - SIGN_FLAG = 1, PLUS_FLAG = 2, MINUS_FLAG = 4, HASH_FLAG = 8, - CHAR_FLAG = 0x10 // Argument has char type - used in error reporting. - }; - - // An empty format specifier. - struct EmptySpec - {}; - - // A type specifier. - template <char TYPE> - struct TypeSpec: EmptySpec - { - Alignment align() const - { - return ALIGN_DEFAULT; - } - unsigned width() const - { - return 0; - } - int precision() const - { - return -1; - } - bool flag(unsigned) const - { - return false; - } - char type() const - { - return TYPE; - } - char fill() const - { - return ' '; - } - }; - - // A width specifier. - struct WidthSpec - { - unsigned width_; - // Fill is always wchar_t and cast to char if necessary to avoid having - // two specialization of WidthSpec and its subclasses. - wchar_t fill_; - - WidthSpec(unsigned width, wchar_t fill): width_(width), fill_(fill) - {} - - unsigned width() const - { - return width_; - } - wchar_t fill() const - { - return fill_; - } - }; - - // An alignment specifier. - struct AlignSpec: WidthSpec - { - Alignment align_; - - AlignSpec(unsigned width, wchar_t fill, Alignment align = ALIGN_DEFAULT) - : WidthSpec(width, fill), align_(align) - {} - - Alignment align() const - { - return align_; - } - - int precision() const - { - return -1; - } - }; - - // An alignment and type specifier. - template <char TYPE> - struct AlignTypeSpec: AlignSpec - { - AlignTypeSpec(unsigned width, wchar_t fill): AlignSpec(width, fill) - {} - - bool flag(unsigned) const - { - return false; - } - char type() const - { - return TYPE; - } - }; - - // A full format specifier. - struct FormatSpec: AlignSpec - { - unsigned flags_; - int precision_; - char type_; - - FormatSpec( - unsigned width = 0, char type = 0, wchar_t fill = ' ') - : AlignSpec(width, fill), flags_(0), precision_(-1), type_(type) - {} - - bool flag(unsigned f) const - { - return (flags_ & f) != 0; - } - int precision() const - { - return precision_; - } - char type() const - { - return type_; - } - }; - - // An integer format specifier. - template <typename T, typename SpecT = TypeSpec<0>, typename Char = char> - class IntFormatSpec: public SpecT - { - private: - T value_; - - public: - IntFormatSpec(T val, const SpecT &spec = SpecT()) - : SpecT(spec), value_(val) - {} - - T value() const - { - return value_; - } - }; - - // A string format specifier. - template <typename Char> - class StrFormatSpec: public AlignSpec - { - private: - const Char *str_; - - public: - template <typename FillChar> - StrFormatSpec(const Char *str, unsigned width, FillChar fill) - : AlignSpec(width, fill), str_(str) - { - internal::CharTraits<Char>::convert(FillChar()); - } - - const Char *str() const - { - return str_; - } - }; - - /** - Returns an integer format specifier to format the value in base 2. - */ - IntFormatSpec<int, TypeSpec<'b'> > bin(int value); - - /** - Returns an integer format specifier to format the value in base 8. - */ - IntFormatSpec<int, TypeSpec<'o'> > oct(int value); - - /** - Returns an integer format specifier to format the value in base 16 using - lower-case letters for the digits above 9. - */ - IntFormatSpec<int, TypeSpec<'x'> > hex(int value); - - /** - Returns an integer formatter format specifier to format in base 16 using - upper-case letters for the digits above 9. - */ - IntFormatSpec<int, TypeSpec<'X'> > hexu(int value); - - /** - \rst - Returns an integer format specifier to pad the formatted argument with the - fill character to the specified width using the default (right) numeric - alignment. - - **Example**:: - - MemoryWriter out; - out << pad(hex(0xcafe), 8, '0'); - // out.str() == "0000cafe" - - \endrst - */ - template <char TYPE_CODE, typename Char> - IntFormatSpec<int, AlignTypeSpec<TYPE_CODE>, Char> pad( - int value, unsigned width, Char fill = ' '); +/** +\rst +An argument visitor based on the `curiously recurring template pattern +<http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_. + +To use `~fmt::ArgVisitor` define a subclass that implements some or all of the +visit methods with the same signatures as the methods in `~fmt::ArgVisitor`, +for example, `~fmt::ArgVisitor::visit_int()`. +Pass the subclass as the *Impl* template parameter. Then calling +`~fmt::ArgVisitor::visit` for some argument will dispatch to a visit method +specific to the argument type. For example, if the argument type is +``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass +will be called. If the subclass doesn't contain a method with this signature, +then a corresponding method of `~fmt::ArgVisitor` will be called. + +**Example**:: + +class MyArgVisitor : public fmt::ArgVisitor<MyArgVisitor, void> { +public: +void visit_int(int value) { fmt::print("{}", value); } +void visit_double(double value) { fmt::print("{}", value ); } +}; +\endrst +*/ +template <typename Impl, typename Result> +class ArgVisitor +{ +private: + typedef internal::Arg Arg; + +public: + void report_unhandled_arg() + {} + + Result visit_unhandled_arg() + { + FMT_DISPATCH(report_unhandled_arg()); + return Result(); + } + + /** Visits an ``int`` argument. **/ + Result visit_int(int value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits a ``long long`` argument. **/ + Result visit_long_long(LongLong value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits an ``unsigned`` argument. **/ + Result visit_uint(unsigned value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits an ``unsigned long long`` argument. **/ + Result visit_ulong_long(ULongLong value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits a ``bool`` argument. **/ + Result visit_bool(bool value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits a ``char`` or ``wchar_t`` argument. **/ + Result visit_char(int value) + { + return FMT_DISPATCH(visit_any_int(value)); + } + + /** Visits an argument of any integral type. **/ + template <typename T> + Result visit_any_int(T) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a ``double`` argument. **/ + Result visit_double(double value) + { + return FMT_DISPATCH(visit_any_double(value)); + } + + /** Visits a ``long double`` argument. **/ + Result visit_long_double(long double value) + { + return FMT_DISPATCH(visit_any_double(value)); + } + + /** Visits a ``double`` or ``long double`` argument. **/ + template <typename T> + Result visit_any_double(T) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a null-terminated C string (``const char *``) argument. **/ + Result visit_cstring(const char *) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a string argument. **/ + Result visit_string(Arg::StringValue<char>) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a wide string argument. **/ + Result visit_wstring(Arg::StringValue<wchar_t>) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits a pointer argument. **/ + Result visit_pointer(const void *) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** Visits an argument of a custom (user-defined) type. **/ + Result visit_custom(Arg::CustomValue) + { + return FMT_DISPATCH(visit_unhandled_arg()); + } + + /** + \rst + Visits an argument dispatching to the appropriate visit method based on + the argument type. For example, if the argument type is ``double`` then + the `~fmt::ArgVisitor::visit_double()` method of the *Impl* class will be + called. + \endrst + */ + Result visit(const Arg &arg) + { + switch (arg.type) + { + case Arg::NONE: + case Arg::NAMED_ARG: + FMT_ASSERT(false, "invalid argument type"); + break; + case Arg::INT: + return FMT_DISPATCH(visit_int(arg.int_value)); + case Arg::UINT: + return FMT_DISPATCH(visit_uint(arg.uint_value)); + case Arg::LONG_LONG: + return FMT_DISPATCH(visit_long_long(arg.long_long_value)); + case Arg::ULONG_LONG: + return FMT_DISPATCH(visit_ulong_long(arg.ulong_long_value)); + case Arg::BOOL: + return FMT_DISPATCH(visit_bool(arg.int_value != 0)); + case Arg::CHAR: + return FMT_DISPATCH(visit_char(arg.int_value)); + case Arg::DOUBLE: + return FMT_DISPATCH(visit_double(arg.double_value)); + case Arg::LONG_DOUBLE: + return FMT_DISPATCH(visit_long_double(arg.long_double_value)); + case Arg::CSTRING: + return FMT_DISPATCH(visit_cstring(arg.string.value)); + case Arg::STRING: + return FMT_DISPATCH(visit_string(arg.string)); + case Arg::WSTRING: + return FMT_DISPATCH(visit_wstring(arg.wstring)); + case Arg::POINTER: + return FMT_DISPATCH(visit_pointer(arg.pointer)); + case Arg::CUSTOM: + return FMT_DISPATCH(visit_custom(arg.custom)); + } + return Result(); + } +}; + +enum Alignment +{ + ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC +}; + +// Flags. +enum +{ + SIGN_FLAG = 1, PLUS_FLAG = 2, MINUS_FLAG = 4, HASH_FLAG = 8, + CHAR_FLAG = 0x10 // Argument has char type - used in error reporting. +}; + +// An empty format specifier. +struct EmptySpec +{}; + +// A type specifier. +template <char TYPE> +struct TypeSpec: EmptySpec +{ + Alignment align() const + { + return ALIGN_DEFAULT; + } + unsigned width() const + { + return 0; + } + int precision() const + { + return -1; + } + bool flag(unsigned) const + { + return false; + } + char type() const + { + return TYPE; + } + char fill() const + { + return ' '; + } +}; + +// A width specifier. +struct WidthSpec +{ + unsigned width_; + // Fill is always wchar_t and cast to char if necessary to avoid having + // two specialization of WidthSpec and its subclasses. + wchar_t fill_; + + WidthSpec(unsigned width, wchar_t fill): width_(width), fill_(fill) + {} + + unsigned width() const + { + return width_; + } + wchar_t fill() const + { + return fill_; + } +}; + +// An alignment specifier. +struct AlignSpec: WidthSpec +{ + Alignment align_; + + AlignSpec(unsigned width, wchar_t fill, Alignment align = ALIGN_DEFAULT) + : WidthSpec(width, fill), align_(align) + {} + + Alignment align() const + { + return align_; + } + + int precision() const + { + return -1; + } +}; + +// An alignment and type specifier. +template <char TYPE> +struct AlignTypeSpec: AlignSpec +{ + AlignTypeSpec(unsigned width, wchar_t fill): AlignSpec(width, fill) + {} + + bool flag(unsigned) const + { + return false; + } + char type() const + { + return TYPE; + } +}; + +// A full format specifier. +struct FormatSpec: AlignSpec +{ + unsigned flags_; + int precision_; + char type_; + + FormatSpec( + unsigned width = 0, char type = 0, wchar_t fill = ' ') + : AlignSpec(width, fill), flags_(0), precision_(-1), type_(type) + {} + + bool flag(unsigned f) const + { + return (flags_ & f) != 0; + } + int precision() const + { + return precision_; + } + char type() const + { + return type_; + } +}; + +// An integer format specifier. +template <typename T, typename SpecT = TypeSpec<0>, typename Char = char> +class IntFormatSpec: public SpecT +{ +private: + T value_; + +public: + IntFormatSpec(T val, const SpecT &spec = SpecT()) + : SpecT(spec), value_(val) + {} + + T value() const + { + return value_; + } +}; + +// A string format specifier. +template <typename Char> +class StrFormatSpec: public AlignSpec +{ +private: + const Char *str_; + +public: + template <typename FillChar> + StrFormatSpec(const Char *str, unsigned width, FillChar fill) + : AlignSpec(width, fill), str_(str) + { + internal::CharTraits<Char>::convert(FillChar()); + } + + const Char *str() const + { + return str_; + } +}; + +/** +Returns an integer format specifier to format the value in base 2. +*/ +IntFormatSpec<int, TypeSpec<'b'> > bin(int value); + +/** +Returns an integer format specifier to format the value in base 8. +*/ +IntFormatSpec<int, TypeSpec<'o'> > oct(int value); + +/** +Returns an integer format specifier to format the value in base 16 using +lower-case letters for the digits above 9. +*/ +IntFormatSpec<int, TypeSpec<'x'> > hex(int value); + +/** +Returns an integer formatter format specifier to format in base 16 using +upper-case letters for the digits above 9. +*/ +IntFormatSpec<int, TypeSpec<'X'> > hexu(int value); + +/** +\rst +Returns an integer format specifier to pad the formatted argument with the +fill character to the specified width using the default (right) numeric +alignment. + +**Example**:: + +MemoryWriter out; +out << pad(hex(0xcafe), 8, '0'); +// out.str() == "0000cafe" + +\endrst +*/ +template <char TYPE_CODE, typename Char> +IntFormatSpec<int, AlignTypeSpec<TYPE_CODE>, Char> pad( + int value, unsigned width, Char fill = ' '); #define FMT_DEFINE_INT_FORMATTERS(TYPE) \ inline IntFormatSpec<TYPE, TypeSpec<'b'> > bin(TYPE value) { \ @@ -2234,358 +2254,368 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ value, AlignTypeSpec<0>(width, fill)); \ } - FMT_DEFINE_INT_FORMATTERS(int) - FMT_DEFINE_INT_FORMATTERS(long) - FMT_DEFINE_INT_FORMATTERS(unsigned) - FMT_DEFINE_INT_FORMATTERS(unsigned long) - FMT_DEFINE_INT_FORMATTERS(LongLong) - FMT_DEFINE_INT_FORMATTERS(ULongLong) - - /** - \rst - Returns a string formatter that pads the formatted argument with the fill - character to the specified width using the default (left) string alignment. - - **Example**:: - - std::string s = str(MemoryWriter() << pad("abc", 8)); - // s == "abc " - - \endrst - */ - template <typename Char> - inline StrFormatSpec<Char> pad( - const Char *str, unsigned width, Char fill = ' ') - { - return StrFormatSpec<Char>(str, width, fill); - } - - inline StrFormatSpec<wchar_t> pad( - const wchar_t *str, unsigned width, char fill = ' ') - { - return StrFormatSpec<wchar_t>(str, width, fill); - } - - namespace internal { - - template <typename Char> - class ArgMap - { - private: - typedef std::vector< - std::pair<fmt::BasicStringRef<Char>, internal::Arg> > MapType; - typedef typename MapType::value_type Pair; - - MapType map_; - - public: - FMT_API void init(const ArgList &args); - - const internal::Arg *find(const fmt::BasicStringRef<Char> &name) const - { - // The list is unsorted, so just return the first matching name. - for (typename MapType::const_iterator it = map_.begin(), end = map_.end(); - it != end; ++it) { - if (it->first == name) - return &it->second; - } - return FMT_NULL; - } - }; - - template <typename Impl, typename Char> - class ArgFormatterBase: public ArgVisitor<Impl, void> - { - private: - BasicWriter<Char> &writer_; - FormatSpec &spec_; - - FMT_DISALLOW_COPY_AND_ASSIGN(ArgFormatterBase); - - void write_pointer(const void *p) - { - spec_.flags_ = HASH_FLAG; - spec_.type_ = 'x'; - writer_.write_int(reinterpret_cast<uintptr_t>(p), spec_); - } - - protected: - BasicWriter<Char> &writer() - { - return writer_; - } - FormatSpec &spec() - { - return spec_; - } - - void write(bool value) - { - const char *str_value = value ? "true" : "false"; - Arg::StringValue<char> str = { str_value, std::strlen(str_value) }; - writer_.write_str(str, spec_); - } - - void write(const char *value) - { - Arg::StringValue<char> str = { value, value ? std::strlen(value) : 0 }; - writer_.write_str(str, spec_); - } - - public: - ArgFormatterBase(BasicWriter<Char> &w, FormatSpec &s) - : writer_(w), spec_(s) - {} - - template <typename T> - void visit_any_int(T value) - { - writer_.write_int(value, spec_); - } - - template <typename T> - void visit_any_double(T value) - { - writer_.write_double(value, spec_); - } - - void visit_bool(bool value) - { - if (spec_.type_) { - visit_any_int(value); - return; - } - write(value); - } - - void visit_char(int value) - { - if (spec_.type_ && spec_.type_ != 'c') { - spec_.flags_ |= CHAR_FLAG; - writer_.write_int(value, spec_); - return; - } - if (spec_.align_ == ALIGN_NUMERIC || spec_.flags_ != 0) - FMT_THROW(FormatError("invalid format specifier for char")); - typedef typename BasicWriter<Char>::CharPtr CharPtr; - Char fill = internal::CharTraits<Char>::cast(spec_.fill()); - CharPtr out = CharPtr(); - const unsigned CHAR_SIZE = 1; - if (spec_.width_ > CHAR_SIZE) { - out = writer_.grow_buffer(spec_.width_); - if (spec_.align_ == ALIGN_RIGHT) { - std::uninitialized_fill_n(out, spec_.width_ - CHAR_SIZE, fill); - out += spec_.width_ - CHAR_SIZE; - } - else if (spec_.align_ == ALIGN_CENTER) { - out = writer_.fill_padding(out, spec_.width_, - internal::const_check(CHAR_SIZE), fill); - } - else { - std::uninitialized_fill_n(out + CHAR_SIZE, - spec_.width_ - CHAR_SIZE, fill); - } - } - else { - out = writer_.grow_buffer(CHAR_SIZE); - } - *out = internal::CharTraits<Char>::cast(value); - } - - void visit_cstring(const char *value) - { - if (spec_.type_ == 'p') - return write_pointer(value); - write(value); - } - - void visit_string(Arg::StringValue<char> value) - { - writer_.write_str(value, spec_); - } - - using ArgVisitor<Impl, void>::visit_wstring; - - void visit_wstring(Arg::StringValue<Char> value) - { - writer_.write_str(value, spec_); - } - - void visit_pointer(const void *value) - { - if (spec_.type_ && spec_.type_ != 'p') - report_unknown_type(spec_.type_, "pointer"); - write_pointer(value); - } - }; - - class FormatterBase - { - private: - ArgList args_; - int next_arg_index_; - - // Returns the argument with specified index. - FMT_API Arg do_get_arg(unsigned arg_index, const char *&error); - - protected: - const ArgList &args() const - { - return args_; - } - - explicit FormatterBase(const ArgList &args) - { - args_ = args; - next_arg_index_ = 0; - } - - // Returns the next argument. - Arg next_arg(const char *&error) - { - if (next_arg_index_ >= 0) - return do_get_arg(internal::to_unsigned(next_arg_index_++), error); - error = "cannot switch from manual to automatic argument indexing"; - return Arg(); - } - - // Checks if manual indexing is used and returns the argument with - // specified index. - Arg get_arg(unsigned arg_index, const char *&error) - { - return check_no_auto_index(error) ? do_get_arg(arg_index, error) : Arg(); - } - - bool check_no_auto_index(const char *&error) - { - if (next_arg_index_ > 0) { - error = "cannot switch from automatic to manual argument indexing"; - return false; - } - next_arg_index_ = -1; - return true; - } - - template <typename Char> - void write(BasicWriter<Char> &w, const Char *start, const Char *end) - { - if (start != end) - w << BasicStringRef<Char>(start, internal::to_unsigned(end - start)); - } - }; - } // namespace internal - - /** - \rst - An argument formatter based on the `curiously recurring template pattern - <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_. - - To use `~fmt::BasicArgFormatter` define a subclass that implements some or - all of the visit methods with the same signatures as the methods in - `~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`. - Pass the subclass as the *Impl* template parameter. When a formatting - function processes an argument, it will dispatch to a visit method - specific to the argument type. For example, if the argument type is - ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass - will be called. If the subclass doesn't contain a method with this signature, - then a corresponding method of `~fmt::BasicArgFormatter` or its superclass - will be called. - \endrst - */ - template <typename Impl, typename Char> - class BasicArgFormatter: public internal::ArgFormatterBase<Impl, Char> - { - private: - BasicFormatter<Char, Impl> &formatter_; - const Char *format_; - - public: - /** - \rst - Constructs an argument formatter object. - *formatter* is a reference to the main formatter object, *spec* contains - format specifier information for standard argument types, and *fmt* points - to the part of the format string being parsed for custom argument types. - \endrst - */ - BasicArgFormatter(BasicFormatter<Char, Impl> &formatter, - FormatSpec &spec, const Char *fmt) - : internal::ArgFormatterBase<Impl, Char>(formatter.writer(), spec), - formatter_(formatter), format_(fmt) - {} - - /** Formats an argument of a custom (user-defined) type. */ - void visit_custom(internal::Arg::CustomValue c) - { - c.format(&formatter_, c.value, &format_); - } - }; - - /** The default argument formatter. */ - template <typename Char> - class ArgFormatter: public BasicArgFormatter<ArgFormatter<Char>, Char> - { - public: - /** Constructs an argument formatter object. */ - ArgFormatter(BasicFormatter<Char> &formatter, - FormatSpec &spec, const Char *fmt) - : BasicArgFormatter<ArgFormatter<Char>, Char>(formatter, spec, fmt) - {} - }; - - /** This template formats data and writes the output to a writer. */ - template <typename CharType, typename ArgFormatter> - class BasicFormatter: private internal::FormatterBase - { - public: - /** The character type for the output. */ - typedef CharType Char; - - private: - BasicWriter<Char> &writer_; - internal::ArgMap<Char> map_; - - FMT_DISALLOW_COPY_AND_ASSIGN(BasicFormatter); - - using internal::FormatterBase::get_arg; - - // Checks if manual indexing is used and returns the argument with - // specified name. - internal::Arg get_arg(BasicStringRef<Char> arg_name, const char *&error); - - // Parses argument index and returns corresponding argument. - internal::Arg parse_arg_index(const Char *&s); - - // Parses argument name and returns corresponding argument. - internal::Arg parse_arg_name(const Char *&s); - - public: - /** - \rst - Constructs a ``BasicFormatter`` object. References to the arguments and - the writer are stored in the formatter object so make sure they have - appropriate lifetimes. - \endrst - */ - BasicFormatter(const ArgList &args, BasicWriter<Char> &w) - : internal::FormatterBase(args), writer_(w) - {} - - /** Returns a reference to the writer associated with this formatter. */ - BasicWriter<Char> &writer() - { - return writer_; - } - - /** Formats stored arguments and writes the output to the writer. */ - void format(BasicCStringRef<Char> format_str); - - // Formats a single argument and advances format_str, a format string pointer. - const Char *format(const Char *&format_str, const internal::Arg &arg); - }; - - // Generates a comma-separated list with results of applying f to - // numbers 0..n-1. +FMT_DEFINE_INT_FORMATTERS(int) +FMT_DEFINE_INT_FORMATTERS(long) +FMT_DEFINE_INT_FORMATTERS(unsigned) +FMT_DEFINE_INT_FORMATTERS(unsigned long) +FMT_DEFINE_INT_FORMATTERS(LongLong) +FMT_DEFINE_INT_FORMATTERS(ULongLong) + +/** +\rst +Returns a string formatter that pads the formatted argument with the fill +character to the specified width using the default (left) string alignment. + +**Example**:: + +std::string s = str(MemoryWriter() << pad("abc", 8)); +// s == "abc " + +\endrst +*/ +template <typename Char> +inline StrFormatSpec<Char> pad( + const Char *str, unsigned width, Char fill = ' ') +{ + return StrFormatSpec<Char>(str, width, fill); +} + +inline StrFormatSpec<wchar_t> pad( + const wchar_t *str, unsigned width, char fill = ' ') +{ + return StrFormatSpec<wchar_t>(str, width, fill); +} + +namespace internal +{ + +template <typename Char> +class ArgMap +{ +private: + typedef std::vector< + std::pair<fmt::BasicStringRef<Char>, internal::Arg> > MapType; + typedef typename MapType::value_type Pair; + + MapType map_; + +public: + FMT_API void init(const ArgList &args); + + const internal::Arg *find(const fmt::BasicStringRef<Char> &name) const + { + // The list is unsorted, so just return the first matching name. + for (typename MapType::const_iterator it = map_.begin(), end = map_.end(); + it != end; ++it) + { + if (it->first == name) + return &it->second; + } + return FMT_NULL; + } +}; + +template <typename Impl, typename Char> +class ArgFormatterBase: public ArgVisitor<Impl, void> +{ +private: + BasicWriter<Char> &writer_; + FormatSpec &spec_; + + FMT_DISALLOW_COPY_AND_ASSIGN(ArgFormatterBase); + + void write_pointer(const void *p) + { + spec_.flags_ = HASH_FLAG; + spec_.type_ = 'x'; + writer_.write_int(reinterpret_cast<uintptr_t>(p), spec_); + } + +protected: + BasicWriter<Char> &writer() + { + return writer_; + } + FormatSpec &spec() + { + return spec_; + } + + void write(bool value) + { + const char *str_value = value ? "true" : "false"; + Arg::StringValue<char> str = { str_value, std::strlen(str_value) }; + writer_.write_str(str, spec_); + } + + void write(const char *value) + { + Arg::StringValue<char> str = { value, value ? std::strlen(value) : 0 }; + writer_.write_str(str, spec_); + } + +public: + ArgFormatterBase(BasicWriter<Char> &w, FormatSpec &s) + : writer_(w), spec_(s) + {} + + template <typename T> + void visit_any_int(T value) + { + writer_.write_int(value, spec_); + } + + template <typename T> + void visit_any_double(T value) + { + writer_.write_double(value, spec_); + } + + void visit_bool(bool value) + { + if (spec_.type_) + { + visit_any_int(value); + return; + } + write(value); + } + + void visit_char(int value) + { + if (spec_.type_ && spec_.type_ != 'c') + { + spec_.flags_ |= CHAR_FLAG; + writer_.write_int(value, spec_); + return; + } + if (spec_.align_ == ALIGN_NUMERIC || spec_.flags_ != 0) + FMT_THROW(FormatError("invalid format specifier for char")); + typedef typename BasicWriter<Char>::CharPtr CharPtr; + Char fill = internal::CharTraits<Char>::cast(spec_.fill()); + CharPtr out = CharPtr(); + const unsigned CHAR_SIZE = 1; + if (spec_.width_ > CHAR_SIZE) + { + out = writer_.grow_buffer(spec_.width_); + if (spec_.align_ == ALIGN_RIGHT) + { + std::uninitialized_fill_n(out, spec_.width_ - CHAR_SIZE, fill); + out += spec_.width_ - CHAR_SIZE; + } + else if (spec_.align_ == ALIGN_CENTER) + { + out = writer_.fill_padding(out, spec_.width_, + internal::const_check(CHAR_SIZE), fill); + } + else + { + std::uninitialized_fill_n(out + CHAR_SIZE, + spec_.width_ - CHAR_SIZE, fill); + } + } + else + { + out = writer_.grow_buffer(CHAR_SIZE); + } + *out = internal::CharTraits<Char>::cast(value); + } + + void visit_cstring(const char *value) + { + if (spec_.type_ == 'p') + return write_pointer(value); + write(value); + } + + void visit_string(Arg::StringValue<char> value) + { + writer_.write_str(value, spec_); + } + + using ArgVisitor<Impl, void>::visit_wstring; + + void visit_wstring(Arg::StringValue<Char> value) + { + writer_.write_str(value, spec_); + } + + void visit_pointer(const void *value) + { + if (spec_.type_ && spec_.type_ != 'p') + report_unknown_type(spec_.type_, "pointer"); + write_pointer(value); + } +}; + +class FormatterBase +{ +private: + ArgList args_; + int next_arg_index_; + + // Returns the argument with specified index. + FMT_API Arg do_get_arg(unsigned arg_index, const char *&error); + +protected: + const ArgList &args() const + { + return args_; + } + + explicit FormatterBase(const ArgList &args) + { + args_ = args; + next_arg_index_ = 0; + } + + // Returns the next argument. + Arg next_arg(const char *&error) + { + if (next_arg_index_ >= 0) + return do_get_arg(internal::to_unsigned(next_arg_index_++), error); + error = "cannot switch from manual to automatic argument indexing"; + return Arg(); + } + + // Checks if manual indexing is used and returns the argument with + // specified index. + Arg get_arg(unsigned arg_index, const char *&error) + { + return check_no_auto_index(error) ? do_get_arg(arg_index, error) : Arg(); + } + + bool check_no_auto_index(const char *&error) + { + if (next_arg_index_ > 0) + { + error = "cannot switch from automatic to manual argument indexing"; + return false; + } + next_arg_index_ = -1; + return true; + } + + template <typename Char> + void write(BasicWriter<Char> &w, const Char *start, const Char *end) + { + if (start != end) + w << BasicStringRef<Char>(start, internal::to_unsigned(end - start)); + } +}; +} // namespace internal + +/** +\rst +An argument formatter based on the `curiously recurring template pattern +<http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_. + +To use `~fmt::BasicArgFormatter` define a subclass that implements some or +all of the visit methods with the same signatures as the methods in +`~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`. +Pass the subclass as the *Impl* template parameter. When a formatting +function processes an argument, it will dispatch to a visit method +specific to the argument type. For example, if the argument type is +``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass +will be called. If the subclass doesn't contain a method with this signature, +then a corresponding method of `~fmt::BasicArgFormatter` or its superclass +will be called. +\endrst +*/ +template <typename Impl, typename Char> +class BasicArgFormatter: public internal::ArgFormatterBase<Impl, Char> +{ +private: + BasicFormatter<Char, Impl> &formatter_; + const Char *format_; + +public: + /** + \rst + Constructs an argument formatter object. + *formatter* is a reference to the main formatter object, *spec* contains + format specifier information for standard argument types, and *fmt* points + to the part of the format string being parsed for custom argument types. + \endrst + */ + BasicArgFormatter(BasicFormatter<Char, Impl> &formatter, + FormatSpec &spec, const Char *fmt) + : internal::ArgFormatterBase<Impl, Char>(formatter.writer(), spec), + formatter_(formatter), format_(fmt) + {} + + /** Formats an argument of a custom (user-defined) type. */ + void visit_custom(internal::Arg::CustomValue c) + { + c.format(&formatter_, c.value, &format_); + } +}; + +/** The default argument formatter. */ +template <typename Char> +class ArgFormatter: public BasicArgFormatter<ArgFormatter<Char>, Char> +{ +public: + /** Constructs an argument formatter object. */ + ArgFormatter(BasicFormatter<Char> &formatter, + FormatSpec &spec, const Char *fmt) + : BasicArgFormatter<ArgFormatter<Char>, Char>(formatter, spec, fmt) + {} +}; + +/** This template formats data and writes the output to a writer. */ +template <typename CharType, typename ArgFormatter> +class BasicFormatter: private internal::FormatterBase +{ +public: + /** The character type for the output. */ + typedef CharType Char; + +private: + BasicWriter<Char> &writer_; + internal::ArgMap<Char> map_; + + FMT_DISALLOW_COPY_AND_ASSIGN(BasicFormatter); + + using internal::FormatterBase::get_arg; + + // Checks if manual indexing is used and returns the argument with + // specified name. + internal::Arg get_arg(BasicStringRef<Char> arg_name, const char *&error); + + // Parses argument index and returns corresponding argument. + internal::Arg parse_arg_index(const Char *&s); + + // Parses argument name and returns corresponding argument. + internal::Arg parse_arg_name(const Char *&s); + +public: + /** + \rst + Constructs a ``BasicFormatter`` object. References to the arguments and + the writer are stored in the formatter object so make sure they have + appropriate lifetimes. + \endrst + */ + BasicFormatter(const ArgList &args, BasicWriter<Char> &w) + : internal::FormatterBase(args), writer_(w) + {} + + /** Returns a reference to the writer associated with this formatter. */ + BasicWriter<Char> &writer() + { + return writer_; + } + + /** Formats stored arguments and writes the output to the writer. */ + void format(BasicCStringRef<Char> format_str); + + // Formats a single argument and advances format_str, a format string pointer. + const Char *format(const Char *&format_str, const internal::Arg &arg); +}; + +// Generates a comma-separated list with results of applying f to +// numbers 0..n-1. # define FMT_GEN(n, f) FMT_GEN##n(f) # define FMT_GEN1(f) f(0) # define FMT_GEN2(f) FMT_GEN1(f), f(1) @@ -2603,85 +2633,86 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ # define FMT_GEN14(f) FMT_GEN13(f), f(13) # define FMT_GEN15(f) FMT_GEN14(f), f(14) - namespace internal { - inline uint64_t make_type() - { - return 0; - } - - template <typename T> - inline uint64_t make_type(const T &arg) - { - return MakeValue< BasicFormatter<char> >::type(arg); - } - - template <unsigned N, bool/*IsPacked*/ = (N < ArgList::MAX_PACKED_ARGS)> - struct ArgArray; - - template <unsigned N> - struct ArgArray<N, true/*IsPacked*/> - { - typedef Value Type[N > 0 ? N : 1]; - - template <typename Formatter, typename T> - static Value make(const T &value) - { +namespace internal +{ +inline uint64_t make_type() +{ + return 0; +} + +template <typename T> +inline uint64_t make_type(const T &arg) +{ + return MakeValue< BasicFormatter<char> >::type(arg); +} + +template <unsigned N, bool/*IsPacked*/ = (N < ArgList::MAX_PACKED_ARGS)> + struct ArgArray; + +template <unsigned N> +struct ArgArray<N, true/*IsPacked*/> +{ + typedef Value Type[N > 0 ? N : 1]; + +template <typename Formatter, typename T> +static Value make(const T &value) +{ #ifdef __clang__ - Value result = MakeValue<Formatter>(value); - // Workaround a bug in Apple LLVM version 4.2 (clang-425.0.28) of clang: - // https://github.com/fmtlib/fmt/issues/276 - (void)result.custom.format; - return result; + Value result = MakeValue<Formatter>(value); + // Workaround a bug in Apple LLVM version 4.2 (clang-425.0.28) of clang: + // https://github.com/fmtlib/fmt/issues/276 + (void)result.custom.format; + return result; #else - return MakeValue<Formatter>(value); + return MakeValue<Formatter>(value); #endif - } - }; +} + }; - template <unsigned N> - struct ArgArray<N, false/*IsPacked*/> - { - typedef Arg Type[N + 1]; // +1 for the list end Arg::NONE +template <unsigned N> +struct ArgArray<N, false/*IsPacked*/> +{ + typedef Arg Type[N + 1]; // +1 for the list end Arg::NONE - template <typename Formatter, typename T> - static Arg make(const T &value) - { - return MakeArg<Formatter>(value); - } - }; + template <typename Formatter, typename T> + static Arg make(const T &value) + { + return MakeArg<Formatter>(value); + } +}; #if FMT_USE_VARIADIC_TEMPLATES - template <typename Arg, typename... Args> - inline uint64_t make_type(const Arg &first, const Args & ... tail) - { - return make_type(first) | (make_type(tail...) << 4); - } +template <typename Arg, typename... Args> +inline uint64_t make_type(const Arg &first, const Args & ... tail) +{ + return make_type(first) | (make_type(tail...) << 4); +} #else - struct ArgType - { - uint64_t type; +struct ArgType +{ + uint64_t type; - ArgType(): type(0) - {} + ArgType(): type(0) + {} - template <typename T> - ArgType(const T &arg) : type(make_type(arg)) - {} - }; + template <typename T> + ArgType(const T &arg) : type(make_type(arg)) + {} +}; # define FMT_ARG_TYPE_DEFAULT(n) ArgType t##n = ArgType() - inline uint64_t make_type(FMT_GEN15(FMT_ARG_TYPE_DEFAULT)) - { - return t0.type | (t1.type << 4) | (t2.type << 8) | (t3.type << 12) | - (t4.type << 16) | (t5.type << 20) | (t6.type << 24) | (t7.type << 28) | - (t8.type << 32) | (t9.type << 36) | (t10.type << 40) | (t11.type << 44) | - (t12.type << 48) | (t13.type << 52) | (t14.type << 56); - } +inline uint64_t make_type(FMT_GEN15(FMT_ARG_TYPE_DEFAULT)) +{ + return t0.type | (t1.type << 4) | (t2.type << 8) | (t3.type << 12) | + (t4.type << 16) | (t5.type << 20) | (t6.type << 24) | (t7.type << 28) | + (t8.type << 32) | (t9.type << 36) | (t10.type << 40) | (t11.type << 44) | + (t12.type << 48) | (t13.type << 52) | (t14.type << 56); +} #endif - } // namespace internal +} // namespace internal # define FMT_MAKE_TEMPLATE_ARG(n) typename T##n # define FMT_MAKE_ARG_TYPE(n) T##n @@ -2692,7 +2723,7 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ arr[n] = fmt::internal::MakeValue< fmt::BasicFormatter<wchar_t> >(v##n) #if FMT_USE_VARIADIC_TEMPLATES - // Defines a variadic function returning void. +// Defines a variadic function returning void. # define FMT_VARIADIC_VOID(func, arg_type) \ template <typename... Args> \ void func(arg_type arg0, const Args & ... args) { \ @@ -2702,7 +2733,7 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ func(arg0, fmt::ArgList(fmt::internal::make_type(args...), array)); \ } - // Defines a variadic constructor. +// Defines a variadic constructor. # define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \ template <typename... Args> \ ctor(arg0_type arg0, arg1_type arg1, const Args & ... args) { \ @@ -2718,8 +2749,8 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ fmt::internal::MakeValue< fmt::BasicFormatter<Char> >(v##n) # define FMT_MAKE_REF2(n) v##n - // Defines a wrapper for a function taking one argument of type arg_type - // and n additional arguments of arbitrary types. +// Defines a wrapper for a function taking one argument of type arg_type +// and n additional arguments of arbitrary types. # define FMT_WRAP1(func, arg_type, n) \ template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \ inline void func(arg_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) { \ @@ -2728,7 +2759,7 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), array)); \ } - // Emulates a variadic function returning void on a pre-C++11 compiler. +// Emulates a variadic function returning void on a pre-C++11 compiler. # define FMT_VARIADIC_VOID(func, arg_type) \ inline void func(arg_type arg) { func(arg, fmt::ArgList()); } \ FMT_WRAP1(func, arg_type, 1) FMT_WRAP1(func, arg_type, 2) \ @@ -2745,7 +2776,7 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), array)); \ } - // Emulates a variadic constructor on a pre-C++11 compiler. +// Emulates a variadic constructor on a pre-C++11 compiler. # define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \ FMT_CTOR(ctor, func, arg0_type, arg1_type, 1) \ FMT_CTOR(ctor, func, arg0_type, arg1_type, 2) \ @@ -2759,8 +2790,8 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ FMT_CTOR(ctor, func, arg0_type, arg1_type, 10) #endif - // Generates a comma-separated list with results of applying f to pairs - // (argument, index). +// Generates a comma-separated list with results of applying f to pairs +// (argument, index). #define FMT_FOR_EACH1(f, x0) f(x0, 0) #define FMT_FOR_EACH2(f, x0, x1) \ FMT_FOR_EACH1(f, x0), f(x1, 1) @@ -2781,1202 +2812,1276 @@ inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \ #define FMT_FOR_EACH10(f, x0, x1, x2, x3, x4, x5, x6, x7, x8, x9) \ FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8), f(x9, 9) - /** - An error returned by an operating system or a language runtime, - for example a file opening error. - */ - class SystemError: public internal::RuntimeError - { - private: - void init(int err_code, CStringRef format_str, ArgList args); - - protected: - int error_code_; - - typedef char Char; // For FMT_VARIADIC_CTOR. - - SystemError() - {} - - public: - /** - \rst - Constructs a :class:`fmt::SystemError` object with a description - formatted with `fmt::format_system_error`. *message* and additional - arguments passed into the constructor are formatted similarly to - `fmt::format`. - - **Example**:: - - // This throws a SystemError with the description - // cannot open file 'madeup': No such file or directory - // or similar (system message may vary). - const char *filename = "madeup"; - std::FILE *file = std::fopen(filename, "r"); - if (!file) - throw fmt::SystemError(errno, "cannot open file '{}'", filename); - \endrst - */ - SystemError(int error_code, CStringRef message) - { - init(error_code, message, ArgList()); - } - FMT_VARIADIC_CTOR(SystemError, init, int, CStringRef) - - ~SystemError() FMT_DTOR_NOEXCEPT; - - int error_code() const - { - return error_code_; - } - }; - - /** - \rst - Formats an error returned by an operating system or a language runtime, - for example a file opening error, and writes it to *out* in the following - form: - - .. parsed-literal:: - *<message>*: *<system-message>* - - where *<message>* is the passed message and *<system-message>* is - the system message corresponding to the error code. - *error_code* is a system error code as given by ``errno``. - If *error_code* is not a valid error code such as -1, the system message - may look like "Unknown error -1" and is platform-dependent. - \endrst - */ - FMT_API void format_system_error(fmt::Writer &out, int error_code, - fmt::StringRef message) FMT_NOEXCEPT; - - /** - \rst - This template provides operations for formatting and writing data into - a character stream. The output is stored in a buffer provided by a subclass - such as :class:`fmt::BasicMemoryWriter`. - - You can use one of the following typedefs for common character types: - - +---------+----------------------+ - | Type | Definition | - +=========+======================+ - | Writer | BasicWriter<char> | - +---------+----------------------+ - | WWriter | BasicWriter<wchar_t> | - +---------+----------------------+ - - \endrst - */ - template <typename Char> - class BasicWriter - { - private: - // Output buffer. - Buffer<Char> &buffer_; - - FMT_DISALLOW_COPY_AND_ASSIGN(BasicWriter); - - typedef typename internal::CharTraits<Char>::CharPtr CharPtr; +/** +An error returned by an operating system or a language runtime, +for example a file opening error. +*/ +class SystemError: public internal::RuntimeError +{ +private: + void init(int err_code, CStringRef format_str, ArgList args); + +protected: + int error_code_; + + typedef char Char; // For FMT_VARIADIC_CTOR. + + SystemError() + {} + +public: + /** + \rst + Constructs a :class:`fmt::SystemError` object with a description + formatted with `fmt::format_system_error`. *message* and additional + arguments passed into the constructor are formatted similarly to + `fmt::format`. + + **Example**:: + + // This throws a SystemError with the description + // cannot open file 'madeup': No such file or directory + // or similar (system message may vary). + const char *filename = "madeup"; + std::FILE *file = std::fopen(filename, "r"); + if (!file) + throw fmt::SystemError(errno, "cannot open file '{}'", filename); + \endrst + */ + SystemError(int error_code, CStringRef message) + { + init(error_code, message, ArgList()); + } + FMT_VARIADIC_CTOR(SystemError, init, int, CStringRef) + + ~SystemError() FMT_DTOR_NOEXCEPT; + + int error_code() const + { + return error_code_; + } +}; + +/** +\rst +Formats an error returned by an operating system or a language runtime, +for example a file opening error, and writes it to *out* in the following +form: + +.. parsed-literal:: +*<message>*: *<system-message>* + +where *<message>* is the passed message and *<system-message>* is +the system message corresponding to the error code. +*error_code* is a system error code as given by ``errno``. +If *error_code* is not a valid error code such as -1, the system message +may look like "Unknown error -1" and is platform-dependent. +\endrst +*/ +FMT_API void format_system_error(fmt::Writer &out, int error_code, + fmt::StringRef message) FMT_NOEXCEPT; + +/** +\rst +This template provides operations for formatting and writing data into +a character stream. The output is stored in a buffer provided by a subclass +such as :class:`fmt::BasicMemoryWriter`. + +You can use one of the following typedefs for common character types: + ++---------+----------------------+ +| Type | Definition | ++=========+======================+ +| Writer | BasicWriter<char> | ++---------+----------------------+ +| WWriter | BasicWriter<wchar_t> | ++---------+----------------------+ + +\endrst +*/ +template <typename Char> +class BasicWriter +{ +private: + // Output buffer. + Buffer<Char> &buffer_; + + FMT_DISALLOW_COPY_AND_ASSIGN(BasicWriter); + + typedef typename internal::CharTraits<Char>::CharPtr CharPtr; #if FMT_SECURE_SCL - // Returns pointer value. - static Char *get(CharPtr p) - { - return p.base(); - } + // Returns pointer value. + static Char *get(CharPtr p) + { + return p.base(); + } #else - static Char *get(Char *p) - { - return p; - } + static Char *get(Char *p) + { + return p; + } #endif - // Fills the padding around the content and returns the pointer to the - // content area. - static CharPtr fill_padding(CharPtr buffer, - unsigned total_size, std::size_t content_size, wchar_t fill); - - // Grows the buffer by n characters and returns a pointer to the newly - // allocated area. - CharPtr grow_buffer(std::size_t n) - { - std::size_t size = buffer_.size(); - buffer_.resize(size + n); - return internal::make_ptr(&buffer_[size], n); - } - - // Writes an unsigned decimal integer. - template <typename UInt> - Char *write_unsigned_decimal(UInt value, unsigned prefix_size = 0) - { - unsigned num_digits = internal::count_digits(value); - Char *ptr = get(grow_buffer(prefix_size + num_digits)); - internal::format_decimal(ptr + prefix_size, value, num_digits); - return ptr; - } - - // Writes a decimal integer. - template <typename Int> - void write_decimal(Int value) - { - typedef typename internal::IntTraits<Int>::MainType MainType; - MainType abs_value = static_cast<MainType>(value); - if (internal::is_negative(value)) { - abs_value = 0 - abs_value; - *write_unsigned_decimal(abs_value, 1) = '-'; - } - else { - write_unsigned_decimal(abs_value, 0); - } - } - - // Prepare a buffer for integer formatting. - CharPtr prepare_int_buffer(unsigned num_digits, - const EmptySpec &, const char *prefix, unsigned prefix_size) - { - unsigned size = prefix_size + num_digits; - CharPtr p = grow_buffer(size); - std::uninitialized_copy(prefix, prefix + prefix_size, p); - return p + size - 1; - } - - template <typename Spec> - CharPtr prepare_int_buffer(unsigned num_digits, - const Spec &spec, const char *prefix, unsigned prefix_size); - - // Formats an integer. - template <typename T, typename Spec> - void write_int(T value, Spec spec); - - // Formats a floating-point number (double or long double). - template <typename T> - void write_double(T value, const FormatSpec &spec); - - // Writes a formatted string. - template <typename StrChar> - CharPtr write_str(const StrChar *s, std::size_t size, const AlignSpec &spec); - - template <typename StrChar> - void write_str(const internal::Arg::StringValue<StrChar> &str, - const FormatSpec &spec); - - // This following methods are private to disallow writing wide characters - // and strings to a char stream. If you want to print a wide string as a - // pointer as std::ostream does, cast it to const void*. - // Do not implement! - void operator<<(typename internal::WCharHelper<wchar_t, Char>::Unsupported); - void operator<<( - typename internal::WCharHelper<const wchar_t *, Char>::Unsupported); - - // Appends floating-point length specifier to the format string. - // The second argument is only used for overload resolution. - void append_float_length(Char *&format_ptr, long double) - { - *format_ptr++ = 'L'; - } - - template<typename T> - void append_float_length(Char *&, T) - {} - - template <typename Impl, typename Char_> - friend class internal::ArgFormatterBase; - - template <typename Impl, typename Char_> - friend class BasicPrintfArgFormatter; - - protected: - /** - Constructs a ``BasicWriter`` object. - */ - explicit BasicWriter(Buffer<Char> &b): buffer_(b) - {} - - public: - /** - \rst - Destroys a ``BasicWriter`` object. - \endrst - */ - virtual ~BasicWriter() - {} - - /** - Returns the total number of characters written. - */ - std::size_t size() const - { - return buffer_.size(); - } - - /** - Returns a pointer to the output buffer content. No terminating null - character is appended. - */ - const Char *data() const FMT_NOEXCEPT - { - return &buffer_[0]; - } - - /** - Returns a pointer to the output buffer content with terminating null - character appended. - */ - const Char *c_str() const - { - std::size_t size = buffer_.size(); - buffer_.reserve(size + 1); - buffer_[size] = '\0'; - return &buffer_[0]; - } - - /** - \rst - Returns the content of the output buffer as an `std::string`. - \endrst - */ - std::basic_string<Char> str() const - { - return std::basic_string<Char>(&buffer_[0], buffer_.size()); - } - - /** - \rst - Writes formatted data. - - *args* is an argument list representing arbitrary arguments. - - **Example**:: - - MemoryWriter out; - out.write("Current point:\n"); - out.write("({:+f}, {:+f})", -3.14, 3.14); - - This will write the following output to the ``out`` object: - - .. code-block:: none - - Current point: - (-3.140000, +3.140000) - - The output can be accessed using :func:`data()`, :func:`c_str` or - :func:`str` methods. - - See also :ref:`syntax`. - \endrst - */ - void write(BasicCStringRef<Char> format, ArgList args) - { - BasicFormatter<Char>(args, *this).format(format); - } - FMT_VARIADIC_VOID(write, BasicCStringRef<Char>) - - BasicWriter &operator<<(int value) - { - write_decimal(value); - return *this; - } - BasicWriter &operator<<(unsigned value) - { - return *this << IntFormatSpec<unsigned>(value); - } - BasicWriter &operator<<(long value) - { - write_decimal(value); - return *this; - } - BasicWriter &operator<<(unsigned long value) - { - return *this << IntFormatSpec<unsigned long>(value); - } - BasicWriter &operator<<(LongLong value) - { - write_decimal(value); - return *this; - } - - /** - \rst - Formats *value* and writes it to the stream. - \endrst - */ - BasicWriter &operator<<(ULongLong value) - { - return *this << IntFormatSpec<ULongLong>(value); - } - - BasicWriter &operator<<(double value) - { - write_double(value, FormatSpec()); - return *this; - } - - /** - \rst - Formats *value* using the general format for floating-point numbers - (``'g'``) and writes it to the stream. - \endrst - */ - BasicWriter &operator<<(long double value) - { - write_double(value, FormatSpec()); - return *this; - } - - /** - Writes a character to the stream. - */ - BasicWriter &operator<<(char value) - { - buffer_.push_back(value); - return *this; - } - - BasicWriter &operator<<( - typename internal::WCharHelper<wchar_t, Char>::Supported value) - { - buffer_.push_back(value); - return *this; - } - - /** - \rst - Writes *value* to the stream. - \endrst - */ - BasicWriter &operator<<(fmt::BasicStringRef<Char> value) - { - const Char *str = value.data(); - buffer_.append(str, str + value.size()); - return *this; - } - - BasicWriter &operator<<( - typename internal::WCharHelper<StringRef, Char>::Supported value) - { - const char *str = value.data(); - buffer_.append(str, str + value.size()); - return *this; - } - - template <typename T, typename Spec, typename FillChar> - BasicWriter &operator<<(IntFormatSpec<T, Spec, FillChar> spec) - { - internal::CharTraits<Char>::convert(FillChar()); - write_int(spec.value(), spec); - return *this; - } - - template <typename StrChar> - BasicWriter &operator<<(const StrFormatSpec<StrChar> &spec) - { - const StrChar *s = spec.str(); - write_str(s, std::char_traits<Char>::length(s), spec); - return *this; - } - - void clear() FMT_NOEXCEPT - { - buffer_.clear(); - } - - Buffer<Char> &buffer() FMT_NOEXCEPT - { - return buffer_; - } - }; - - template <typename Char> - template <typename StrChar> - typename BasicWriter<Char>::CharPtr BasicWriter<Char>::write_str( - const StrChar *s, std::size_t size, const AlignSpec &spec) - { - CharPtr out = CharPtr(); - if (spec.width() > size) { - out = grow_buffer(spec.width()); - Char fill = internal::CharTraits<Char>::cast(spec.fill()); - if (spec.align() == ALIGN_RIGHT) { - std::uninitialized_fill_n(out, spec.width() - size, fill); - out += spec.width() - size; - } - else if (spec.align() == ALIGN_CENTER) { - out = fill_padding(out, spec.width(), size, fill); - } - else { - std::uninitialized_fill_n(out + size, spec.width() - size, fill); - } - } - else { - out = grow_buffer(size); - } - std::uninitialized_copy(s, s + size, out); - return out; - } - - template <typename Char> - template <typename StrChar> - void BasicWriter<Char>::write_str( - const internal::Arg::StringValue<StrChar> &s, const FormatSpec &spec) - { - // Check if StrChar is convertible to Char. - internal::CharTraits<Char>::convert(StrChar()); - if (spec.type_ && spec.type_ != 's') - internal::report_unknown_type(spec.type_, "string"); - const StrChar *str_value = s.value; - std::size_t str_size = s.size; - if (str_size == 0) { - if (!str_value) { - FMT_THROW(FormatError("string pointer is null")); - } - } - std::size_t precision = static_cast<std::size_t>(spec.precision_); - if (spec.precision_ >= 0 && precision < str_size) - str_size = precision; - write_str(str_value, str_size, spec); - } - - template <typename Char> - typename BasicWriter<Char>::CharPtr - BasicWriter<Char>::fill_padding( - CharPtr buffer, unsigned total_size, - std::size_t content_size, wchar_t fill) - { - std::size_t padding = total_size - content_size; - std::size_t left_padding = padding / 2; - Char fill_char = internal::CharTraits<Char>::cast(fill); - std::uninitialized_fill_n(buffer, left_padding, fill_char); - buffer += left_padding; - CharPtr content = buffer; - std::uninitialized_fill_n(buffer + content_size, - padding - left_padding, fill_char); - return content; - } - - template <typename Char> - template <typename Spec> - typename BasicWriter<Char>::CharPtr - BasicWriter<Char>::prepare_int_buffer( - unsigned num_digits, const Spec &spec, - const char *prefix, unsigned prefix_size) - { - unsigned width = spec.width(); - Alignment align = spec.align(); - Char fill = internal::CharTraits<Char>::cast(spec.fill()); - if (spec.precision() > static_cast<int>(num_digits)) { - // Octal prefix '0' is counted as a digit, so ignore it if precision - // is specified. - if (prefix_size > 0 && prefix[prefix_size - 1] == '0') - --prefix_size; - unsigned number_size = - prefix_size + internal::to_unsigned(spec.precision()); - AlignSpec subspec(number_size, '0', ALIGN_NUMERIC); - if (number_size >= width) - return prepare_int_buffer(num_digits, subspec, prefix, prefix_size); - buffer_.reserve(width); - unsigned fill_size = width - number_size; - if (align != ALIGN_LEFT) { - CharPtr p = grow_buffer(fill_size); - std::uninitialized_fill(p, p + fill_size, fill); - } - CharPtr result = prepare_int_buffer( - num_digits, subspec, prefix, prefix_size); - if (align == ALIGN_LEFT) { - CharPtr p = grow_buffer(fill_size); - std::uninitialized_fill(p, p + fill_size, fill); - } - return result; - } - unsigned size = prefix_size + num_digits; - if (width <= size) { - CharPtr p = grow_buffer(size); - std::uninitialized_copy(prefix, prefix + prefix_size, p); - return p + size - 1; - } - CharPtr p = grow_buffer(width); - CharPtr end = p + width; - if (align == ALIGN_LEFT) { - std::uninitialized_copy(prefix, prefix + prefix_size, p); - p += size; - std::uninitialized_fill(p, end, fill); - } - else if (align == ALIGN_CENTER) { - p = fill_padding(p, width, size, fill); - std::uninitialized_copy(prefix, prefix + prefix_size, p); - p += size; - } - else { - if (align == ALIGN_NUMERIC) { - if (prefix_size != 0) { - p = std::uninitialized_copy(prefix, prefix + prefix_size, p); - size -= prefix_size; - } - } - else { - std::uninitialized_copy(prefix, prefix + prefix_size, end - size); - } - std::uninitialized_fill(p, end - size, fill); - p = end; - } - return p - 1; - } - - template <typename Char> - template <typename T, typename Spec> - void BasicWriter<Char>::write_int(T value, Spec spec) - { - unsigned prefix_size = 0; - typedef typename internal::IntTraits<T>::MainType UnsignedType; - UnsignedType abs_value = static_cast<UnsignedType>(value); - char prefix[4] = ""; - if (internal::is_negative(value)) { - prefix[0] = '-'; - ++prefix_size; - abs_value = 0 - abs_value; - } - else if (spec.flag(SIGN_FLAG)) { - prefix[0] = spec.flag(PLUS_FLAG) ? '+' : ' '; - ++prefix_size; - } - switch (spec.type()) { - case 0: case 'd': { - unsigned num_digits = internal::count_digits(abs_value); - CharPtr p = prepare_int_buffer(num_digits, spec, prefix, prefix_size) + 1; - internal::format_decimal(get(p), abs_value, 0); - break; - } - case 'x': case 'X': { - UnsignedType n = abs_value; - if (spec.flag(HASH_FLAG)) { - prefix[prefix_size++] = '0'; - prefix[prefix_size++] = spec.type(); - } - unsigned num_digits = 0; - do { - ++num_digits; - } while ((n >>= 4) != 0); - Char *p = get(prepare_int_buffer( - num_digits, spec, prefix, prefix_size)); - n = abs_value; - const char *digits = spec.type() == 'x' ? - "0123456789abcdef" : "0123456789ABCDEF"; - do { - *p-- = digits[n & 0xf]; - } while ((n >>= 4) != 0); - break; - } - case 'b': case 'B': { - UnsignedType n = abs_value; - if (spec.flag(HASH_FLAG)) { - prefix[prefix_size++] = '0'; - prefix[prefix_size++] = spec.type(); - } - unsigned num_digits = 0; - do { - ++num_digits; - } while ((n >>= 1) != 0); - Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size)); - n = abs_value; - do { - *p-- = static_cast<Char>('0' + (n & 1)); - } while ((n >>= 1) != 0); - break; - } - case 'o': { - UnsignedType n = abs_value; - if (spec.flag(HASH_FLAG)) - prefix[prefix_size++] = '0'; - unsigned num_digits = 0; - do { - ++num_digits; - } while ((n >>= 3) != 0); - Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size)); - n = abs_value; - do { - *p-- = static_cast<Char>('0' + (n & 7)); - } while ((n >>= 3) != 0); - break; - } - case 'n': { - unsigned num_digits = internal::count_digits(abs_value); - fmt::StringRef sep = ""; + // Fills the padding around the content and returns the pointer to the + // content area. + static CharPtr fill_padding(CharPtr buffer, + unsigned total_size, std::size_t content_size, wchar_t fill); + + // Grows the buffer by n characters and returns a pointer to the newly + // allocated area. + CharPtr grow_buffer(std::size_t n) + { + std::size_t size = buffer_.size(); + buffer_.resize(size + n); + return internal::make_ptr(&buffer_[size], n); + } + + // Writes an unsigned decimal integer. + template <typename UInt> + Char *write_unsigned_decimal(UInt value, unsigned prefix_size = 0) + { + unsigned num_digits = internal::count_digits(value); + Char *ptr = get(grow_buffer(prefix_size + num_digits)); + internal::format_decimal(ptr + prefix_size, value, num_digits); + return ptr; + } + + // Writes a decimal integer. + template <typename Int> + void write_decimal(Int value) + { + typedef typename internal::IntTraits<Int>::MainType MainType; + MainType abs_value = static_cast<MainType>(value); + if (internal::is_negative(value)) + { + abs_value = 0 - abs_value; + *write_unsigned_decimal(abs_value, 1) = '-'; + } + else + { + write_unsigned_decimal(abs_value, 0); + } + } + + // Prepare a buffer for integer formatting. + CharPtr prepare_int_buffer(unsigned num_digits, + const EmptySpec &, const char *prefix, unsigned prefix_size) + { + unsigned size = prefix_size + num_digits; + CharPtr p = grow_buffer(size); + std::uninitialized_copy(prefix, prefix + prefix_size, p); + return p + size - 1; + } + + template <typename Spec> + CharPtr prepare_int_buffer(unsigned num_digits, + const Spec &spec, const char *prefix, unsigned prefix_size); + + // Formats an integer. + template <typename T, typename Spec> + void write_int(T value, Spec spec); + + // Formats a floating-point number (double or long double). + template <typename T> + void write_double(T value, const FormatSpec &spec); + + // Writes a formatted string. + template <typename StrChar> + CharPtr write_str(const StrChar *s, std::size_t size, const AlignSpec &spec); + + template <typename StrChar> + void write_str(const internal::Arg::StringValue<StrChar> &str, + const FormatSpec &spec); + + // This following methods are private to disallow writing wide characters + // and strings to a char stream. If you want to print a wide string as a + // pointer as std::ostream does, cast it to const void*. + // Do not implement! + void operator<<(typename internal::WCharHelper<wchar_t, Char>::Unsupported); + void operator<<( + typename internal::WCharHelper<const wchar_t *, Char>::Unsupported); + + // Appends floating-point length specifier to the format string. + // The second argument is only used for overload resolution. + void append_float_length(Char *&format_ptr, long double) + { + *format_ptr++ = 'L'; + } + + template<typename T> + void append_float_length(Char *&, T) + {} + + template <typename Impl, typename Char_> + friend class internal::ArgFormatterBase; + + template <typename Impl, typename Char_> + friend class BasicPrintfArgFormatter; + +protected: + /** + Constructs a ``BasicWriter`` object. + */ + explicit BasicWriter(Buffer<Char> &b): buffer_(b) + {} + +public: + /** + \rst + Destroys a ``BasicWriter`` object. + \endrst + */ + virtual ~BasicWriter() + {} + + /** + Returns the total number of characters written. + */ + std::size_t size() const + { + return buffer_.size(); + } + + /** + Returns a pointer to the output buffer content. No terminating null + character is appended. + */ + const Char *data() const FMT_NOEXCEPT + { + return &buffer_[0]; + } + + /** + Returns a pointer to the output buffer content with terminating null + character appended. + */ + const Char *c_str() const + { + std::size_t size = buffer_.size(); + buffer_.reserve(size + 1); + buffer_[size] = '\0'; + return &buffer_[0]; + } + + /** + \rst + Returns the content of the output buffer as an `std::string`. + \endrst + */ + std::basic_string<Char> str() const + { + return std::basic_string<Char>(&buffer_[0], buffer_.size()); + } + + /** + \rst + Writes formatted data. + + *args* is an argument list representing arbitrary arguments. + + **Example**:: + + MemoryWriter out; + out.write("Current point:\n"); + out.write("({:+f}, {:+f})", -3.14, 3.14); + + This will write the following output to the ``out`` object: + + .. code-block:: none + + Current point: + (-3.140000, +3.140000) + + The output can be accessed using :func:`data()`, :func:`c_str` or + :func:`str` methods. + + See also :ref:`syntax`. + \endrst + */ + void write(BasicCStringRef<Char> format, ArgList args) + { + BasicFormatter<Char>(args, *this).format(format); + } + FMT_VARIADIC_VOID(write, BasicCStringRef<Char>) + + BasicWriter &operator<<(int value) + { + write_decimal(value); + return *this; + } + BasicWriter &operator<<(unsigned value) + { + return *this << IntFormatSpec<unsigned>(value); + } + BasicWriter &operator<<(long value) + { + write_decimal(value); + return *this; + } + BasicWriter &operator<<(unsigned long value) + { + return *this << IntFormatSpec<unsigned long>(value); + } + BasicWriter &operator<<(LongLong value) + { + write_decimal(value); + return *this; + } + + /** + \rst + Formats *value* and writes it to the stream. + \endrst + */ + BasicWriter &operator<<(ULongLong value) + { + return *this << IntFormatSpec<ULongLong>(value); + } + + BasicWriter &operator<<(double value) + { + write_double(value, FormatSpec()); + return *this; + } + + /** + \rst + Formats *value* using the general format for floating-point numbers + (``'g'``) and writes it to the stream. + \endrst + */ + BasicWriter &operator<<(long double value) + { + write_double(value, FormatSpec()); + return *this; + } + + /** + Writes a character to the stream. + */ + BasicWriter &operator<<(char value) + { + buffer_.push_back(value); + return *this; + } + + BasicWriter &operator<<( + typename internal::WCharHelper<wchar_t, Char>::Supported value) + { + buffer_.push_back(value); + return *this; + } + + /** + \rst + Writes *value* to the stream. + \endrst + */ + BasicWriter &operator<<(fmt::BasicStringRef<Char> value) + { + const Char *str = value.data(); + buffer_.append(str, str + value.size()); + return *this; + } + + BasicWriter &operator<<( + typename internal::WCharHelper<StringRef, Char>::Supported value) + { + const char *str = value.data(); + buffer_.append(str, str + value.size()); + return *this; + } + + template <typename T, typename Spec, typename FillChar> + BasicWriter &operator<<(IntFormatSpec<T, Spec, FillChar> spec) + { + internal::CharTraits<Char>::convert(FillChar()); + write_int(spec.value(), spec); + return *this; + } + + template <typename StrChar> + BasicWriter &operator<<(const StrFormatSpec<StrChar> &spec) + { + const StrChar *s = spec.str(); + write_str(s, std::char_traits<Char>::length(s), spec); + return *this; + } + + void clear() FMT_NOEXCEPT + { + buffer_.clear(); + } + + Buffer<Char> &buffer() FMT_NOEXCEPT + { + return buffer_; + } +}; + +template <typename Char> +template <typename StrChar> +typename BasicWriter<Char>::CharPtr BasicWriter<Char>::write_str( + const StrChar *s, std::size_t size, const AlignSpec &spec) +{ + CharPtr out = CharPtr(); + if (spec.width() > size) + { + out = grow_buffer(spec.width()); + Char fill = internal::CharTraits<Char>::cast(spec.fill()); + if (spec.align() == ALIGN_RIGHT) + { + std::uninitialized_fill_n(out, spec.width() - size, fill); + out += spec.width() - size; + } + else if (spec.align() == ALIGN_CENTER) + { + out = fill_padding(out, spec.width(), size, fill); + } + else + { + std::uninitialized_fill_n(out + size, spec.width() - size, fill); + } + } + else + { + out = grow_buffer(size); + } + std::uninitialized_copy(s, s + size, out); + return out; +} + +template <typename Char> +template <typename StrChar> +void BasicWriter<Char>::write_str( + const internal::Arg::StringValue<StrChar> &s, const FormatSpec &spec) +{ + // Check if StrChar is convertible to Char. + internal::CharTraits<Char>::convert(StrChar()); + if (spec.type_ && spec.type_ != 's') + internal::report_unknown_type(spec.type_, "string"); + const StrChar *str_value = s.value; + std::size_t str_size = s.size; + if (str_size == 0) + { + if (!str_value) + { + FMT_THROW(FormatError("string pointer is null")); + } + } + std::size_t precision = static_cast<std::size_t>(spec.precision_); + if (spec.precision_ >= 0 && precision < str_size) + str_size = precision; + write_str(str_value, str_size, spec); +} + +template <typename Char> +typename BasicWriter<Char>::CharPtr +BasicWriter<Char>::fill_padding( + CharPtr buffer, unsigned total_size, + std::size_t content_size, wchar_t fill) +{ + std::size_t padding = total_size - content_size; + std::size_t left_padding = padding / 2; + Char fill_char = internal::CharTraits<Char>::cast(fill); + std::uninitialized_fill_n(buffer, left_padding, fill_char); + buffer += left_padding; + CharPtr content = buffer; + std::uninitialized_fill_n(buffer + content_size, + padding - left_padding, fill_char); + return content; +} + +template <typename Char> +template <typename Spec> +typename BasicWriter<Char>::CharPtr +BasicWriter<Char>::prepare_int_buffer( + unsigned num_digits, const Spec &spec, + const char *prefix, unsigned prefix_size) +{ + unsigned width = spec.width(); + Alignment align = spec.align(); + Char fill = internal::CharTraits<Char>::cast(spec.fill()); + if (spec.precision() > static_cast<int>(num_digits)) + { + // Octal prefix '0' is counted as a digit, so ignore it if precision + // is specified. + if (prefix_size > 0 && prefix[prefix_size - 1] == '0') + --prefix_size; + unsigned number_size = + prefix_size + internal::to_unsigned(spec.precision()); + AlignSpec subspec(number_size, '0', ALIGN_NUMERIC); + if (number_size >= width) + return prepare_int_buffer(num_digits, subspec, prefix, prefix_size); + buffer_.reserve(width); + unsigned fill_size = width - number_size; + if (align != ALIGN_LEFT) + { + CharPtr p = grow_buffer(fill_size); + std::uninitialized_fill(p, p + fill_size, fill); + } + CharPtr result = prepare_int_buffer( + num_digits, subspec, prefix, prefix_size); + if (align == ALIGN_LEFT) + { + CharPtr p = grow_buffer(fill_size); + std::uninitialized_fill(p, p + fill_size, fill); + } + return result; + } + unsigned size = prefix_size + num_digits; + if (width <= size) + { + CharPtr p = grow_buffer(size); + std::uninitialized_copy(prefix, prefix + prefix_size, p); + return p + size - 1; + } + CharPtr p = grow_buffer(width); + CharPtr end = p + width; + if (align == ALIGN_LEFT) + { + std::uninitialized_copy(prefix, prefix + prefix_size, p); + p += size; + std::uninitialized_fill(p, end, fill); + } + else if (align == ALIGN_CENTER) + { + p = fill_padding(p, width, size, fill); + std::uninitialized_copy(prefix, prefix + prefix_size, p); + p += size; + } + else + { + if (align == ALIGN_NUMERIC) + { + if (prefix_size != 0) + { + p = std::uninitialized_copy(prefix, prefix + prefix_size, p); + size -= prefix_size; + } + } + else + { + std::uninitialized_copy(prefix, prefix + prefix_size, end - size); + } + std::uninitialized_fill(p, end - size, fill); + p = end; + } + return p - 1; +} + +template <typename Char> +template <typename T, typename Spec> +void BasicWriter<Char>::write_int(T value, Spec spec) +{ + unsigned prefix_size = 0; + typedef typename internal::IntTraits<T>::MainType UnsignedType; + UnsignedType abs_value = static_cast<UnsignedType>(value); + char prefix[4] = ""; + if (internal::is_negative(value)) + { + prefix[0] = '-'; + ++prefix_size; + abs_value = 0 - abs_value; + } + else if (spec.flag(SIGN_FLAG)) + { + prefix[0] = spec.flag(PLUS_FLAG) ? '+' : ' '; + ++prefix_size; + } + switch (spec.type()) + { + case 0: + case 'd': + { + unsigned num_digits = internal::count_digits(abs_value); + CharPtr p = prepare_int_buffer(num_digits, spec, prefix, prefix_size) + 1; + internal::format_decimal(get(p), abs_value, 0); + break; + } + case 'x': + case 'X': + { + UnsignedType n = abs_value; + if (spec.flag(HASH_FLAG)) + { + prefix[prefix_size++] = '0'; + prefix[prefix_size++] = spec.type(); + } + unsigned num_digits = 0; + do + { + ++num_digits; + } + while ((n >>= 4) != 0); + Char *p = get(prepare_int_buffer( + num_digits, spec, prefix, prefix_size)); + n = abs_value; + const char *digits = spec.type() == 'x' ? + "0123456789abcdef" : "0123456789ABCDEF"; + do + { + *p-- = digits[n & 0xf]; + } + while ((n >>= 4) != 0); + break; + } + case 'b': + case 'B': + { + UnsignedType n = abs_value; + if (spec.flag(HASH_FLAG)) + { + prefix[prefix_size++] = '0'; + prefix[prefix_size++] = spec.type(); + } + unsigned num_digits = 0; + do + { + ++num_digits; + } + while ((n >>= 1) != 0); + Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size)); + n = abs_value; + do + { + *p-- = static_cast<Char>('0' + (n & 1)); + } + while ((n >>= 1) != 0); + break; + } + case 'o': + { + UnsignedType n = abs_value; + if (spec.flag(HASH_FLAG)) + prefix[prefix_size++] = '0'; + unsigned num_digits = 0; + do + { + ++num_digits; + } + while ((n >>= 3) != 0); + Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size)); + n = abs_value; + do + { + *p-- = static_cast<Char>('0' + (n & 7)); + } + while ((n >>= 3) != 0); + break; + } + case 'n': + { + unsigned num_digits = internal::count_digits(abs_value); + fmt::StringRef sep = ""; #ifndef ANDROID - sep = internal::thousands_sep(std::localeconv()); + sep = internal::thousands_sep(std::localeconv()); #endif - unsigned size = static_cast<unsigned>( - num_digits + sep.size() * ((num_digits - 1) / 3)); - CharPtr p = prepare_int_buffer(size, spec, prefix, prefix_size) + 1; - internal::format_decimal(get(p), abs_value, 0, internal::ThousandsSep(sep)); - break; - } - default: - internal::report_unknown_type( - spec.type(), spec.flag(CHAR_FLAG) ? "char" : "integer"); - break; - } - } - - template <typename Char> - template <typename T> - void BasicWriter<Char>::write_double(T value, const FormatSpec &spec) - { - // Check type. - char type = spec.type(); - bool upper = false; - switch (type) { - case 0: - type = 'g'; - break; - case 'e': case 'f': case 'g': case 'a': - break; - case 'F': + unsigned size = static_cast<unsigned>( + num_digits + sep.size() * ((num_digits - 1) / 3)); + CharPtr p = prepare_int_buffer(size, spec, prefix, prefix_size) + 1; + internal::format_decimal(get(p), abs_value, 0, internal::ThousandsSep(sep)); + break; + } + default: + internal::report_unknown_type( + spec.type(), spec.flag(CHAR_FLAG) ? "char" : "integer"); + break; + } +} + +template <typename Char> +template <typename T> +void BasicWriter<Char>::write_double(T value, const FormatSpec &spec) +{ + // Check type. + char type = spec.type(); + bool upper = false; + switch (type) + { + case 0: + type = 'g'; + break; + case 'e': + case 'f': + case 'g': + case 'a': + break; + case 'F': #if FMT_MSC_VER - // MSVC's printf doesn't support 'F'. - type = 'f'; + // MSVC's printf doesn't support 'F'. + type = 'f'; #endif - // Fall through. - case 'E': case 'G': case 'A': - upper = true; - break; - default: - internal::report_unknown_type(type, "double"); - break; - } - - char sign = 0; - // Use isnegative instead of value < 0 because the latter is always - // false for NaN. - if (internal::FPUtil::isnegative(static_cast<double>(value))) { - sign = '-'; - value = -value; - } - else if (spec.flag(SIGN_FLAG)) { - sign = spec.flag(PLUS_FLAG) ? '+' : ' '; - } - - if (internal::FPUtil::isnotanumber(value)) { - // Format NaN ourselves because sprintf's output is not consistent - // across platforms. - std::size_t nan_size = 4; - const char *nan = upper ? " NAN" : " nan"; - if (!sign) { - --nan_size; - ++nan; - } - CharPtr out = write_str(nan, nan_size, spec); - if (sign) - *out = sign; - return; - } - - if (internal::FPUtil::isinfinity(value)) { - // Format infinity ourselves because sprintf's output is not consistent - // across platforms. - std::size_t inf_size = 4; - const char *inf = upper ? " INF" : " inf"; - if (!sign) { - --inf_size; - ++inf; - } - CharPtr out = write_str(inf, inf_size, spec); - if (sign) - *out = sign; - return; - } - - std::size_t offset = buffer_.size(); - unsigned width = spec.width(); - if (sign) { - buffer_.reserve(buffer_.size() + (width > 1u ? width : 1u)); - if (width > 0) - --width; - ++offset; - } - - // Build format string. - enum - { - MAX_FORMAT_SIZE = 10 - }; // longest format: %#-*.*Lg - Char format[MAX_FORMAT_SIZE]; - Char *format_ptr = format; - *format_ptr++ = '%'; - unsigned width_for_sprintf = width; - if (spec.flag(HASH_FLAG)) - *format_ptr++ = '#'; - if (spec.align() == ALIGN_CENTER) { - width_for_sprintf = 0; - } - else { - if (spec.align() == ALIGN_LEFT) - *format_ptr++ = '-'; - if (width != 0) - *format_ptr++ = '*'; - } - if (spec.precision() >= 0) { - *format_ptr++ = '.'; - *format_ptr++ = '*'; - } - - append_float_length(format_ptr, value); - *format_ptr++ = type; - *format_ptr = '\0'; - - // Format using snprintf. - Char fill = internal::CharTraits<Char>::cast(spec.fill()); - unsigned n = 0; - Char *start = FMT_NULL; - for (;;) { - std::size_t buffer_size = buffer_.capacity() - offset; + // Fall through. + case 'E': + case 'G': + case 'A': + upper = true; + break; + default: + internal::report_unknown_type(type, "double"); + break; + } + + char sign = 0; + // Use isnegative instead of value < 0 because the latter is always + // false for NaN. + if (internal::FPUtil::isnegative(static_cast<double>(value))) + { + sign = '-'; + value = -value; + } + else if (spec.flag(SIGN_FLAG)) + { + sign = spec.flag(PLUS_FLAG) ? '+' : ' '; + } + + if (internal::FPUtil::isnotanumber(value)) + { + // Format NaN ourselves because sprintf's output is not consistent + // across platforms. + std::size_t nan_size = 4; + const char *nan = upper ? " NAN" : " nan"; + if (!sign) + { + --nan_size; + ++nan; + } + CharPtr out = write_str(nan, nan_size, spec); + if (sign) + *out = sign; + return; + } + + if (internal::FPUtil::isinfinity(value)) + { + // Format infinity ourselves because sprintf's output is not consistent + // across platforms. + std::size_t inf_size = 4; + const char *inf = upper ? " INF" : " inf"; + if (!sign) + { + --inf_size; + ++inf; + } + CharPtr out = write_str(inf, inf_size, spec); + if (sign) + *out = sign; + return; + } + + std::size_t offset = buffer_.size(); + unsigned width = spec.width(); + if (sign) + { + buffer_.reserve(buffer_.size() + (width > 1u ? width : 1u)); + if (width > 0) + --width; + ++offset; + } + + // Build format string. + enum + { + MAX_FORMAT_SIZE = 10 + }; // longest format: %#-*.*Lg + Char format[MAX_FORMAT_SIZE]; + Char *format_ptr = format; + *format_ptr++ = '%'; + unsigned width_for_sprintf = width; + if (spec.flag(HASH_FLAG)) + *format_ptr++ = '#'; + if (spec.align() == ALIGN_CENTER) + { + width_for_sprintf = 0; + } + else + { + if (spec.align() == ALIGN_LEFT) + *format_ptr++ = '-'; + if (width != 0) + *format_ptr++ = '*'; + } + if (spec.precision() >= 0) + { + *format_ptr++ = '.'; + *format_ptr++ = '*'; + } + + append_float_length(format_ptr, value); + *format_ptr++ = type; + *format_ptr = '\0'; + + // Format using snprintf. + Char fill = internal::CharTraits<Char>::cast(spec.fill()); + unsigned n = 0; + Char *start = FMT_NULL; + for (;;) + { + std::size_t buffer_size = buffer_.capacity() - offset; #if FMT_MSC_VER - // MSVC's vsnprintf_s doesn't work with zero size, so reserve - // space for at least one extra character to make the size non-zero. - // Note that the buffer's capacity will increase by more than 1. - if (buffer_size == 0) { - buffer_.reserve(offset + 1); - buffer_size = buffer_.capacity() - offset; - } + // MSVC's vsnprintf_s doesn't work with zero size, so reserve + // space for at least one extra character to make the size non-zero. + // Note that the buffer's capacity will increase by more than 1. + if (buffer_size == 0) + { + buffer_.reserve(offset + 1); + buffer_size = buffer_.capacity() - offset; + } #endif - start = &buffer_[offset]; - int result = internal::CharTraits<Char>::format_float( - start, buffer_size, format, width_for_sprintf, spec.precision(), value); - if (result >= 0) { - n = internal::to_unsigned(result); - if (offset + n < buffer_.capacity()) - break; // The buffer is large enough - continue with formatting. - buffer_.reserve(offset + n + 1); - } - else { - // If result is negative we ask to increase the capacity by at least 1, - // but as std::vector, the buffer grows exponentially. - buffer_.reserve(buffer_.capacity() + 1); - } - } - if (sign) { - if ((spec.align() != ALIGN_RIGHT && spec.align() != ALIGN_DEFAULT) || - *start != ' ') { - *(start - 1) = sign; - sign = 0; - } - else { - *(start - 1) = fill; - } - ++n; - } - if (spec.align() == ALIGN_CENTER && spec.width() > n) { - width = spec.width(); - CharPtr p = grow_buffer(width); - std::memmove(get(p) + (width - n) / 2, get(p), n * sizeof(Char)); - fill_padding(p, spec.width(), n, fill); - return; - } - if (spec.fill() != ' ' || sign) { - while (*start == ' ') - *start++ = fill; - if (sign) - *(start - 1) = sign; - } - grow_buffer(n); - } - - /** - \rst - This class template provides operations for formatting and writing data - into a character stream. The output is stored in a memory buffer that grows - dynamically. - - You can use one of the following typedefs for common character types - and the standard allocator: - - +---------------+-----------------------------------------------------+ - | Type | Definition | - +===============+=====================================================+ - | MemoryWriter | BasicMemoryWriter<char, std::allocator<char>> | - +---------------+-----------------------------------------------------+ - | WMemoryWriter | BasicMemoryWriter<wchar_t, std::allocator<wchar_t>> | - +---------------+-----------------------------------------------------+ - - **Example**:: - - MemoryWriter out; - out << "The answer is " << 42 << "\n"; - out.write("({:+f}, {:+f})", -3.14, 3.14); - - This will write the following output to the ``out`` object: - - .. code-block:: none - - The answer is 42 - (-3.140000, +3.140000) - - The output can be converted to an ``std::string`` with ``out.str()`` or - accessed as a C string with ``out.c_str()``. - \endrst - */ - template <typename Char, typename Allocator = std::allocator<Char> > - class BasicMemoryWriter: public BasicWriter<Char> - { - private: - internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE, Allocator> buffer_; - - public: - explicit BasicMemoryWriter(const Allocator& alloc = Allocator()) - : BasicWriter<Char>(buffer_), buffer_(alloc) - {} + start = &buffer_[offset]; + int result = internal::CharTraits<Char>::format_float( + start, buffer_size, format, width_for_sprintf, spec.precision(), value); + if (result >= 0) + { + n = internal::to_unsigned(result); + if (offset + n < buffer_.capacity()) + break; // The buffer is large enough - continue with formatting. + buffer_.reserve(offset + n + 1); + } + else + { + // If result is negative we ask to increase the capacity by at least 1, + // but as std::vector, the buffer grows exponentially. + buffer_.reserve(buffer_.capacity() + 1); + } + } + if (sign) + { + if ((spec.align() != ALIGN_RIGHT && spec.align() != ALIGN_DEFAULT) || + *start != ' ') + { + *(start - 1) = sign; + sign = 0; + } + else + { + *(start - 1) = fill; + } + ++n; + } + if (spec.align() == ALIGN_CENTER && spec.width() > n) + { + width = spec.width(); + CharPtr p = grow_buffer(width); + std::memmove(get(p) + (width - n) / 2, get(p), n * sizeof(Char)); + fill_padding(p, spec.width(), n, fill); + return; + } + if (spec.fill() != ' ' || sign) + { + while (*start == ' ') + *start++ = fill; + if (sign) + *(start - 1) = sign; + } + grow_buffer(n); +} + +/** +\rst +This class template provides operations for formatting and writing data +into a character stream. The output is stored in a memory buffer that grows +dynamically. + +You can use one of the following typedefs for common character types +and the standard allocator: + ++---------------+-----------------------------------------------------+ +| Type | Definition | ++===============+=====================================================+ +| MemoryWriter | BasicMemoryWriter<char, std::allocator<char>> | ++---------------+-----------------------------------------------------+ +| WMemoryWriter | BasicMemoryWriter<wchar_t, std::allocator<wchar_t>> | ++---------------+-----------------------------------------------------+ + +**Example**:: + +MemoryWriter out; +out << "The answer is " << 42 << "\n"; +out.write("({:+f}, {:+f})", -3.14, 3.14); + +This will write the following output to the ``out`` object: + +.. code-block:: none + +The answer is 42 +(-3.140000, +3.140000) + +The output can be converted to an ``std::string`` with ``out.str()`` or +accessed as a C string with ``out.c_str()``. +\endrst +*/ +template <typename Char, typename Allocator = std::allocator<Char> > +class BasicMemoryWriter: public BasicWriter<Char> +{ +private: + internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE, Allocator> buffer_; + +public: + explicit BasicMemoryWriter(const Allocator& alloc = Allocator()) + : BasicWriter<Char>(buffer_), buffer_(alloc) + {} #if FMT_USE_RVALUE_REFERENCES - /** - \rst - Constructs a :class:`fmt::BasicMemoryWriter` object moving the content - of the other object to it. - \endrst - */ - BasicMemoryWriter(BasicMemoryWriter &&other) - : BasicWriter<Char>(buffer_), buffer_(std::move(other.buffer_)) - {} - - /** - \rst - Moves the content of the other ``BasicMemoryWriter`` object to this one. - \endrst - */ - BasicMemoryWriter &operator=(BasicMemoryWriter &&other) - { - buffer_ = std::move(other.buffer_); - return *this; - } + /** + \rst + Constructs a :class:`fmt::BasicMemoryWriter` object moving the content + of the other object to it. + \endrst + */ + BasicMemoryWriter(BasicMemoryWriter &&other) + : BasicWriter<Char>(buffer_), buffer_(std::move(other.buffer_)) + {} + + /** + \rst + Moves the content of the other ``BasicMemoryWriter`` object to this one. + \endrst + */ + BasicMemoryWriter &operator=(BasicMemoryWriter &&other) + { + buffer_ = std::move(other.buffer_); + return *this; + } #endif - }; - - typedef BasicMemoryWriter<char> MemoryWriter; - typedef BasicMemoryWriter<wchar_t> WMemoryWriter; - - /** - \rst - This class template provides operations for formatting and writing data - into a fixed-size array. For writing into a dynamically growing buffer - use :class:`fmt::BasicMemoryWriter`. - - Any write method will throw ``std::runtime_error`` if the output doesn't fit - into the array. - - You can use one of the following typedefs for common character types: - - +--------------+---------------------------+ - | Type | Definition | - +==============+===========================+ - | ArrayWriter | BasicArrayWriter<char> | - +--------------+---------------------------+ - | WArrayWriter | BasicArrayWriter<wchar_t> | - +--------------+---------------------------+ - \endrst - */ - template <typename Char> - class BasicArrayWriter: public BasicWriter<Char> - { - private: - internal::FixedBuffer<Char> buffer_; - - public: - /** - \rst - Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the - given size. - \endrst - */ - BasicArrayWriter(Char *array, std::size_t size) - : BasicWriter<Char>(buffer_), buffer_(array, size) - {} - - /** - \rst - Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the - size known at compile time. - \endrst - */ - template <std::size_t SIZE> - explicit BasicArrayWriter(Char(&array)[SIZE]) - : BasicWriter<Char>(buffer_), buffer_(array, SIZE) - {} - }; - - typedef BasicArrayWriter<char> ArrayWriter; - typedef BasicArrayWriter<wchar_t> WArrayWriter; - - // Reports a system error without throwing an exception. - // Can be used to report errors from destructors. - FMT_API void report_system_error(int error_code, - StringRef message) FMT_NOEXCEPT; +}; + +typedef BasicMemoryWriter<char> MemoryWriter; +typedef BasicMemoryWriter<wchar_t> WMemoryWriter; + +/** +\rst +This class template provides operations for formatting and writing data +into a fixed-size array. For writing into a dynamically growing buffer +use :class:`fmt::BasicMemoryWriter`. + +Any write method will throw ``std::runtime_error`` if the output doesn't fit +into the array. + +You can use one of the following typedefs for common character types: + ++--------------+---------------------------+ +| Type | Definition | ++==============+===========================+ +| ArrayWriter | BasicArrayWriter<char> | ++--------------+---------------------------+ +| WArrayWriter | BasicArrayWriter<wchar_t> | ++--------------+---------------------------+ +\endrst +*/ +template <typename Char> +class BasicArrayWriter: public BasicWriter<Char> +{ +private: + internal::FixedBuffer<Char> buffer_; + +public: + /** + \rst + Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the + given size. + \endrst + */ + BasicArrayWriter(Char *array, std::size_t size) + : BasicWriter<Char>(buffer_), buffer_(array, size) + {} + + /** + \rst + Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the + size known at compile time. + \endrst + */ + template <std::size_t SIZE> + explicit BasicArrayWriter(Char(&array)[SIZE]) + : BasicWriter<Char>(buffer_), buffer_(array, SIZE) + {} +}; + +typedef BasicArrayWriter<char> ArrayWriter; +typedef BasicArrayWriter<wchar_t> WArrayWriter; + +// Reports a system error without throwing an exception. +// Can be used to report errors from destructors. +FMT_API void report_system_error(int error_code, + StringRef message) FMT_NOEXCEPT; #if FMT_USE_WINDOWS_H - /** A Windows error. */ - class WindowsError: public SystemError - { - private: - FMT_API void init(int error_code, CStringRef format_str, ArgList args); - - public: - /** - \rst - Constructs a :class:`fmt::WindowsError` object with the description - of the form - - .. parsed-literal:: - *<message>*: *<system-message>* - - where *<message>* is the formatted message and *<system-message>* is the - system message corresponding to the error code. - *error_code* is a Windows error code as given by ``GetLastError``. - If *error_code* is not a valid error code such as -1, the system message - will look like "error -1". - - **Example**:: - - // This throws a WindowsError with the description - // cannot open file 'madeup': The system cannot find the file specified. - // or similar (system message may vary). - const char *filename = "madeup"; - LPOFSTRUCT of = LPOFSTRUCT(); - HFILE file = OpenFile(filename, &of, OF_READ); - if (file == HFILE_ERROR) { - throw fmt::WindowsError(GetLastError(), - "cannot open file '{}'", filename); - } - \endrst - */ - WindowsError(int error_code, CStringRef message) - { - init(error_code, message, ArgList()); - } - FMT_VARIADIC_CTOR(WindowsError, init, int, CStringRef) - }; - - // Reports a Windows error without throwing an exception. - // Can be used to report errors from destructors. - FMT_API void report_windows_error(int error_code, - StringRef message) FMT_NOEXCEPT; +/** A Windows error. */ +class WindowsError: public SystemError +{ +private: + FMT_API void init(int error_code, CStringRef format_str, ArgList args); + +public: + /** + \rst + Constructs a :class:`fmt::WindowsError` object with the description + of the form + + .. parsed-literal:: + *<message>*: *<system-message>* + + where *<message>* is the formatted message and *<system-message>* is the + system message corresponding to the error code. + *error_code* is a Windows error code as given by ``GetLastError``. + If *error_code* is not a valid error code such as -1, the system message + will look like "error -1". + + **Example**:: + + // This throws a WindowsError with the description + // cannot open file 'madeup': The system cannot find the file specified. + // or similar (system message may vary). + const char *filename = "madeup"; + LPOFSTRUCT of = LPOFSTRUCT(); + HFILE file = OpenFile(filename, &of, OF_READ); + if (file == HFILE_ERROR) { + throw fmt::WindowsError(GetLastError(), + "cannot open file '{}'", filename); + } + \endrst + */ + WindowsError(int error_code, CStringRef message) + { + init(error_code, message, ArgList()); + } + FMT_VARIADIC_CTOR(WindowsError, init, int, CStringRef) +}; + +// Reports a Windows error without throwing an exception. +// Can be used to report errors from destructors. +FMT_API void report_windows_error(int error_code, + StringRef message) FMT_NOEXCEPT; #endif - enum Color - { - BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE - }; - - /** - Formats a string and prints it to stdout using ANSI escape sequences - to specify color (experimental). - Example: - print_colored(fmt::RED, "Elapsed time: {0:.2f} seconds", 1.23); - */ - FMT_API void print_colored(Color c, CStringRef format, ArgList args); - - /** - \rst - Formats arguments and returns the result as a string. - - **Example**:: - - std::string message = format("The answer is {}", 42); - \endrst - */ - inline std::string format(CStringRef format_str, ArgList args) - { - MemoryWriter w; - w.write(format_str, args); - return w.str(); - } - - inline std::wstring format(WCStringRef format_str, ArgList args) - { - WMemoryWriter w; - w.write(format_str, args); - return w.str(); - } - - /** - \rst - Prints formatted data to the file *f*. - - **Example**:: - - print(stderr, "Don't {}!", "panic"); - \endrst - */ - FMT_API void print(std::FILE *f, CStringRef format_str, ArgList args); - - /** - \rst - Prints formatted data to ``stdout``. - - **Example**:: - - print("Elapsed time: {0:.2f} seconds", 1.23); - \endrst - */ - FMT_API void print(CStringRef format_str, ArgList args); - - /** - Fast integer formatter. - */ - class FormatInt - { - private: - // Buffer should be large enough to hold all digits (digits10 + 1), - // a sign and a null character. - enum - { - BUFFER_SIZE = std::numeric_limits<ULongLong>::digits10 + 3 - }; - mutable char buffer_[BUFFER_SIZE]; - char *str_; - - // Formats value in reverse and returns the number of digits. - char *format_decimal(ULongLong value) - { - char *buffer_end = buffer_ + BUFFER_SIZE - 1; - while (value >= 100) { - // Integer division is slow so do it for a group of two digits instead - // of for every digit. The idea comes from the talk by Alexandrescu - // "Three Optimization Tips for C++". See speed-test for a comparison. - unsigned index = static_cast<unsigned>((value % 100) * 2); - value /= 100; - *--buffer_end = internal::Data::DIGITS[index + 1]; - *--buffer_end = internal::Data::DIGITS[index]; - } - if (value < 10) { - *--buffer_end = static_cast<char>('0' + value); - return buffer_end; - } - unsigned index = static_cast<unsigned>(value * 2); - *--buffer_end = internal::Data::DIGITS[index + 1]; - *--buffer_end = internal::Data::DIGITS[index]; - return buffer_end; - } - - void FormatSigned(LongLong value) - { - ULongLong abs_value = static_cast<ULongLong>(value); - bool negative = value < 0; - if (negative) - abs_value = 0 - abs_value; - str_ = format_decimal(abs_value); - if (negative) - *--str_ = '-'; - } - - public: - explicit FormatInt(int value) - { - FormatSigned(value); - } - explicit FormatInt(long value) - { - FormatSigned(value); - } - explicit FormatInt(LongLong value) - { - FormatSigned(value); - } - explicit FormatInt(unsigned value): str_(format_decimal(value)) - {} - explicit FormatInt(unsigned long value): str_(format_decimal(value)) - {} - explicit FormatInt(ULongLong value): str_(format_decimal(value)) - {} - - /** Returns the number of characters written to the output buffer. */ - std::size_t size() const - { - return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1); - } - - /** - Returns a pointer to the output buffer content. No terminating null - character is appended. - */ - const char *data() const - { - return str_; - } - - /** - Returns a pointer to the output buffer content with terminating null - character appended. - */ - const char *c_str() const - { - buffer_[BUFFER_SIZE - 1] = '\0'; - return str_; - } - - /** - \rst - Returns the content of the output buffer as an ``std::string``. - \endrst - */ - std::string str() const - { - return std::string(str_, size()); - } - }; - - // Formats a decimal integer value writing into buffer and returns - // a pointer to the end of the formatted string. This function doesn't - // write a terminating null character. - template <typename T> - inline void format_decimal(char *&buffer, T value) - { - typedef typename internal::IntTraits<T>::MainType MainType; - MainType abs_value = static_cast<MainType>(value); - if (internal::is_negative(value)) { - *buffer++ = '-'; - abs_value = 0 - abs_value; - } - if (abs_value < 100) { - if (abs_value < 10) { - *buffer++ = static_cast<char>('0' + abs_value); - return; - } - unsigned index = static_cast<unsigned>(abs_value * 2); - *buffer++ = internal::Data::DIGITS[index]; - *buffer++ = internal::Data::DIGITS[index + 1]; - return; - } - unsigned num_digits = internal::count_digits(abs_value); - internal::format_decimal(buffer, abs_value, num_digits); - buffer += num_digits; - } - - /** - \rst - Returns a named argument for formatting functions. - - **Example**:: - - print("Elapsed time: {s:.2f} seconds", arg("s", 1.23)); - - \endrst - */ - template <typename T> - inline internal::NamedArgWithType<char, T> arg(StringRef name, const T &arg) - { - return internal::NamedArgWithType<char, T>(name, arg); - } - - template <typename T> - inline internal::NamedArgWithType<wchar_t, T> arg(WStringRef name, const T &arg) - { - return internal::NamedArgWithType<wchar_t, T>(name, arg); - } - - // The following two functions are deleted intentionally to disable - // nested named arguments as in ``format("{}", arg("a", arg("b", 42)))``. - template <typename Char> - void arg(StringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED; - template <typename Char> - void arg(WStringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED; +enum Color +{ + BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE +}; + +/** +Formats a string and prints it to stdout using ANSI escape sequences +to specify color (experimental). +Example: +print_colored(fmt::RED, "Elapsed time: {0:.2f} seconds", 1.23); +*/ +FMT_API void print_colored(Color c, CStringRef format, ArgList args); + +/** +\rst +Formats arguments and returns the result as a string. + +**Example**:: + +std::string message = format("The answer is {}", 42); +\endrst +*/ +inline std::string format(CStringRef format_str, ArgList args) +{ + MemoryWriter w; + w.write(format_str, args); + return w.str(); +} + +inline std::wstring format(WCStringRef format_str, ArgList args) +{ + WMemoryWriter w; + w.write(format_str, args); + return w.str(); +} + +/** +\rst +Prints formatted data to the file *f*. + +**Example**:: + +print(stderr, "Don't {}!", "panic"); +\endrst +*/ +FMT_API void print(std::FILE *f, CStringRef format_str, ArgList args); + +/** +\rst +Prints formatted data to ``stdout``. + +**Example**:: + +print("Elapsed time: {0:.2f} seconds", 1.23); +\endrst +*/ +FMT_API void print(CStringRef format_str, ArgList args); + +/** +Fast integer formatter. +*/ +class FormatInt +{ +private: + // Buffer should be large enough to hold all digits (digits10 + 1), + // a sign and a null character. + enum + { + BUFFER_SIZE = std::numeric_limits<ULongLong>::digits10 + 3 + }; + mutable char buffer_[BUFFER_SIZE]; + char *str_; + + // Formats value in reverse and returns the number of digits. + char *format_decimal(ULongLong value) + { + char *buffer_end = buffer_ + BUFFER_SIZE - 1; + while (value >= 100) + { + // Integer division is slow so do it for a group of two digits instead + // of for every digit. The idea comes from the talk by Alexandrescu + // "Three Optimization Tips for C++". See speed-test for a comparison. + unsigned index = static_cast<unsigned>((value % 100) * 2); + value /= 100; + *--buffer_end = internal::Data::DIGITS[index + 1]; + *--buffer_end = internal::Data::DIGITS[index]; + } + if (value < 10) + { + *--buffer_end = static_cast<char>('0' + value); + return buffer_end; + } + unsigned index = static_cast<unsigned>(value * 2); + *--buffer_end = internal::Data::DIGITS[index + 1]; + *--buffer_end = internal::Data::DIGITS[index]; + return buffer_end; + } + + void FormatSigned(LongLong value) + { + ULongLong abs_value = static_cast<ULongLong>(value); + bool negative = value < 0; + if (negative) + abs_value = 0 - abs_value; + str_ = format_decimal(abs_value); + if (negative) + *--str_ = '-'; + } + +public: + explicit FormatInt(int value) + { + FormatSigned(value); + } + explicit FormatInt(long value) + { + FormatSigned(value); + } + explicit FormatInt(LongLong value) + { + FormatSigned(value); + } + explicit FormatInt(unsigned value): str_(format_decimal(value)) + {} + explicit FormatInt(unsigned long value): str_(format_decimal(value)) + {} + explicit FormatInt(ULongLong value): str_(format_decimal(value)) + {} + + /** Returns the number of characters written to the output buffer. */ + std::size_t size() const + { + return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1); + } + + /** + Returns a pointer to the output buffer content. No terminating null + character is appended. + */ + const char *data() const + { + return str_; + } + + /** + Returns a pointer to the output buffer content with terminating null + character appended. + */ + const char *c_str() const + { + buffer_[BUFFER_SIZE - 1] = '\0'; + return str_; + } + + /** + \rst + Returns the content of the output buffer as an ``std::string``. + \endrst + */ + std::string str() const + { + return std::string(str_, size()); + } +}; + +// Formats a decimal integer value writing into buffer and returns +// a pointer to the end of the formatted string. This function doesn't +// write a terminating null character. +template <typename T> +inline void format_decimal(char *&buffer, T value) +{ + typedef typename internal::IntTraits<T>::MainType MainType; + MainType abs_value = static_cast<MainType>(value); + if (internal::is_negative(value)) + { + *buffer++ = '-'; + abs_value = 0 - abs_value; + } + if (abs_value < 100) + { + if (abs_value < 10) + { + *buffer++ = static_cast<char>('0' + abs_value); + return; + } + unsigned index = static_cast<unsigned>(abs_value * 2); + *buffer++ = internal::Data::DIGITS[index]; + *buffer++ = internal::Data::DIGITS[index + 1]; + return; + } + unsigned num_digits = internal::count_digits(abs_value); + internal::format_decimal(buffer, abs_value, num_digits); + buffer += num_digits; +} + +/** +\rst +Returns a named argument for formatting functions. + +**Example**:: + +print("Elapsed time: {s:.2f} seconds", arg("s", 1.23)); + +\endrst +*/ +template <typename T> +inline internal::NamedArgWithType<char, T> arg(StringRef name, const T &arg) +{ + return internal::NamedArgWithType<char, T>(name, arg); +} + +template <typename T> +inline internal::NamedArgWithType<wchar_t, T> arg(WStringRef name, const T &arg) +{ + return internal::NamedArgWithType<wchar_t, T>(name, arg); +} + +// The following two functions are deleted intentionally to disable +// nested named arguments as in ``format("{}", arg("a", arg("b", 42)))``. +template <typename Char> +void arg(StringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED; +template <typename Char> +void arg(WStringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED; } #if FMT_GCC_VERSION @@ -4105,387 +4210,423 @@ print("point: ({x}, {y})", FMT_CAPTURE(x, y)); #define FMT_CAPTURE_W(...) FMT_FOR_EACH(FMT_CAPTURE_ARG_W_, __VA_ARGS__) -namespace fmt { - FMT_VARIADIC(std::string, format, CStringRef) - FMT_VARIADIC_W(std::wstring, format, WCStringRef) - FMT_VARIADIC(void, print, CStringRef) - FMT_VARIADIC(void, print, std::FILE *, CStringRef) - FMT_VARIADIC(void, print_colored, Color, CStringRef) - - namespace internal { - template <typename Char> - inline bool is_name_start(Char c) - { - return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c; - } - - // Parses an unsigned integer advancing s to the end of the parsed input. - // This function assumes that the first character of s is a digit. - template <typename Char> - unsigned parse_nonnegative_int(const Char *&s) - { - assert('0' <= *s && *s <= '9'); - unsigned value = 0; - do { - unsigned new_value = value * 10 + (*s++ - '0'); - // Check if value wrapped around. - if (new_value < value) { - value = (std::numeric_limits<unsigned>::max)(); - break; - } - value = new_value; - } while ('0' <= *s && *s <= '9'); - // Convert to unsigned to prevent a warning. - unsigned max_int = (std::numeric_limits<int>::max)(); - if (value > max_int) - FMT_THROW(FormatError("number is too big")); - return value; - } - - inline void require_numeric_argument(const Arg &arg, char spec) - { - if (arg.type > Arg::LAST_NUMERIC_TYPE) { - std::string message = - fmt::format("format specifier '{}' requires numeric argument", spec); - FMT_THROW(fmt::FormatError(message)); - } - } - - template <typename Char> - void check_sign(const Char *&s, const Arg &arg) - { - char sign = static_cast<char>(*s); - require_numeric_argument(arg, sign); - if (arg.type == Arg::UINT || arg.type == Arg::ULONG_LONG) { - FMT_THROW(FormatError(fmt::format( - "format specifier '{}' requires signed argument", sign))); - } - ++s; - } - } // namespace internal - - template <typename Char, typename AF> - inline internal::Arg BasicFormatter<Char, AF>::get_arg( - BasicStringRef<Char> arg_name, const char *&error) - { - if (check_no_auto_index(error)) { - map_.init(args()); - const internal::Arg *arg = map_.find(arg_name); - if (arg) - return *arg; - error = "argument not found"; - } - return internal::Arg(); - } - - template <typename Char, typename AF> - inline internal::Arg BasicFormatter<Char, AF>::parse_arg_index(const Char *&s) - { - const char *error = FMT_NULL; - internal::Arg arg = *s < '0' || *s > '9' ? - next_arg(error) : get_arg(internal::parse_nonnegative_int(s), error); - if (error) { - FMT_THROW(FormatError( - *s != '}' && *s != ':' ? "invalid format string" : error)); - } - return arg; - } - - template <typename Char, typename AF> - inline internal::Arg BasicFormatter<Char, AF>::parse_arg_name(const Char *&s) - { - assert(internal::is_name_start(*s)); - const Char *start = s; - Char c; - do { - c = *++s; - } while (internal::is_name_start(c) || ('0' <= c && c <= '9')); - const char *error = FMT_NULL; - internal::Arg arg = get_arg(BasicStringRef<Char>(start, s - start), error); - if (error) - FMT_THROW(FormatError(error)); - return arg; - } - - template <typename Char, typename ArgFormatter> - const Char *BasicFormatter<Char, ArgFormatter>::format( - const Char *&format_str, const internal::Arg &arg) - { - using internal::Arg; - const Char *s = format_str; - FormatSpec spec; - if (*s == ':') { - if (arg.type == Arg::CUSTOM) { - arg.custom.format(this, arg.custom.value, &s); - return s; - } - ++s; - // Parse fill and alignment. - if (Char c = *s) { - const Char *p = s + 1; - spec.align_ = ALIGN_DEFAULT; - do { - switch (*p) { - case '<': - spec.align_ = ALIGN_LEFT; - break; - case '>': - spec.align_ = ALIGN_RIGHT; - break; - case '=': - spec.align_ = ALIGN_NUMERIC; - break; - case '^': - spec.align_ = ALIGN_CENTER; - break; - } - if (spec.align_ != ALIGN_DEFAULT) { - if (p != s) { - if (c == '}') break; - if (c == '{') - FMT_THROW(FormatError("invalid fill character '{'")); - s += 2; - spec.fill_ = c; - } - else ++s; - if (spec.align_ == ALIGN_NUMERIC) - require_numeric_argument(arg, '='); - break; - } - } while (--p >= s); - } - - // Parse sign. - switch (*s) { - case '+': - check_sign(s, arg); - spec.flags_ |= SIGN_FLAG | PLUS_FLAG; - break; - case '-': - check_sign(s, arg); - spec.flags_ |= MINUS_FLAG; - break; - case ' ': - check_sign(s, arg); - spec.flags_ |= SIGN_FLAG; - break; - } - - if (*s == '#') { - require_numeric_argument(arg, '#'); - spec.flags_ |= HASH_FLAG; - ++s; - } - - // Parse zero flag. - if (*s == '0') { - require_numeric_argument(arg, '0'); - spec.align_ = ALIGN_NUMERIC; - spec.fill_ = '0'; - ++s; - } - - // Parse width. - if ('0' <= *s && *s <= '9') { - spec.width_ = internal::parse_nonnegative_int(s); - } - else if (*s == '{') { - ++s; - Arg width_arg = internal::is_name_start(*s) ? - parse_arg_name(s) : parse_arg_index(s); - if (*s++ != '}') - FMT_THROW(FormatError("invalid format string")); - ULongLong value = 0; - switch (width_arg.type) { - case Arg::INT: - if (width_arg.int_value < 0) - FMT_THROW(FormatError("negative width")); - value = width_arg.int_value; - break; - case Arg::UINT: - value = width_arg.uint_value; - break; - case Arg::LONG_LONG: - if (width_arg.long_long_value < 0) - FMT_THROW(FormatError("negative width")); - value = width_arg.long_long_value; - break; - case Arg::ULONG_LONG: - value = width_arg.ulong_long_value; - break; - default: - FMT_THROW(FormatError("width is not integer")); - } - if (value >(std::numeric_limits<int>::max)()) - FMT_THROW(FormatError("number is too big")); - spec.width_ = static_cast<int>(value); - } - - // Parse precision. - if (*s == '.') { - ++s; - spec.precision_ = 0; - if ('0' <= *s && *s <= '9') { - spec.precision_ = internal::parse_nonnegative_int(s); - } - else if (*s == '{') { - ++s; - Arg precision_arg = internal::is_name_start(*s) ? - parse_arg_name(s) : parse_arg_index(s); - if (*s++ != '}') - FMT_THROW(FormatError("invalid format string")); - ULongLong value = 0; - switch (precision_arg.type) { - case Arg::INT: - if (precision_arg.int_value < 0) - FMT_THROW(FormatError("negative precision")); - value = precision_arg.int_value; - break; - case Arg::UINT: - value = precision_arg.uint_value; - break; - case Arg::LONG_LONG: - if (precision_arg.long_long_value < 0) - FMT_THROW(FormatError("negative precision")); - value = precision_arg.long_long_value; - break; - case Arg::ULONG_LONG: - value = precision_arg.ulong_long_value; - break; - default: - FMT_THROW(FormatError("precision is not integer")); - } - if (value >(std::numeric_limits<int>::max)()) - FMT_THROW(FormatError("number is too big")); - spec.precision_ = static_cast<int>(value); - } - else { - FMT_THROW(FormatError("missing precision specifier")); - } - if (arg.type <= Arg::LAST_INTEGER_TYPE || arg.type == Arg::POINTER) { - FMT_THROW(FormatError( - fmt::format("precision not allowed in {} format specifier", - arg.type == Arg::POINTER ? "pointer" : "integer"))); - } - } - - // Parse type. - if (*s != '}' && *s) - spec.type_ = static_cast<char>(*s++); - } - - if (*s++ != '}') - FMT_THROW(FormatError("missing '}' in format string")); - - // Format argument. - ArgFormatter(*this, spec, s - 1).visit(arg); - return s; - } - - template <typename Char, typename AF> - void BasicFormatter<Char, AF>::format(BasicCStringRef<Char> format_str) - { - const Char *s = format_str.c_str(); - const Char *start = s; - while (*s) { - Char c = *s++; - if (c != '{' && c != '}') continue; - if (*s == c) { - write(writer_, start, s); - start = ++s; - continue; - } - if (c == '}') - FMT_THROW(FormatError("unmatched '}' in format string")); - write(writer_, start, s - 1); - internal::Arg arg = internal::is_name_start(*s) ? - parse_arg_name(s) : parse_arg_index(s); - start = s = format(s, arg); - } - write(writer_, start, s); - } +namespace fmt +{ +FMT_VARIADIC(std::string, format, CStringRef) +FMT_VARIADIC_W(std::wstring, format, WCStringRef) +FMT_VARIADIC(void, print, CStringRef) +FMT_VARIADIC(void, print, std::FILE *, CStringRef) +FMT_VARIADIC(void, print_colored, Color, CStringRef) + +namespace internal +{ +template <typename Char> +inline bool is_name_start(Char c) +{ + return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c; +} + +// Parses an unsigned integer advancing s to the end of the parsed input. +// This function assumes that the first character of s is a digit. +template <typename Char> +unsigned parse_nonnegative_int(const Char *&s) +{ + assert('0' <= *s && *s <= '9'); + unsigned value = 0; + do + { + unsigned new_value = value * 10 + (*s++ - '0'); + // Check if value wrapped around. + if (new_value < value) + { + value = (std::numeric_limits<unsigned>::max)(); + break; + } + value = new_value; + } + while ('0' <= *s && *s <= '9'); + // Convert to unsigned to prevent a warning. + unsigned max_int = (std::numeric_limits<int>::max)(); + if (value > max_int) + FMT_THROW(FormatError("number is too big")); + return value; +} + +inline void require_numeric_argument(const Arg &arg, char spec) +{ + if (arg.type > Arg::LAST_NUMERIC_TYPE) + { + std::string message = + fmt::format("format specifier '{}' requires numeric argument", spec); + FMT_THROW(fmt::FormatError(message)); + } +} + +template <typename Char> +void check_sign(const Char *&s, const Arg &arg) +{ + char sign = static_cast<char>(*s); + require_numeric_argument(arg, sign); + if (arg.type == Arg::UINT || arg.type == Arg::ULONG_LONG) + { + FMT_THROW(FormatError(fmt::format( + "format specifier '{}' requires signed argument", sign))); + } + ++s; +} +} // namespace internal + +template <typename Char, typename AF> +inline internal::Arg BasicFormatter<Char, AF>::get_arg( + BasicStringRef<Char> arg_name, const char *&error) +{ + if (check_no_auto_index(error)) + { + map_.init(args()); + const internal::Arg *arg = map_.find(arg_name); + if (arg) + return *arg; + error = "argument not found"; + } + return internal::Arg(); +} + +template <typename Char, typename AF> +inline internal::Arg BasicFormatter<Char, AF>::parse_arg_index(const Char *&s) +{ + const char *error = FMT_NULL; + internal::Arg arg = *s < '0' || *s > '9' ? + next_arg(error) : get_arg(internal::parse_nonnegative_int(s), error); + if (error) + { + FMT_THROW(FormatError( + *s != '}' && *s != ':' ? "invalid format string" : error)); + } + return arg; +} + +template <typename Char, typename AF> +inline internal::Arg BasicFormatter<Char, AF>::parse_arg_name(const Char *&s) +{ + assert(internal::is_name_start(*s)); + const Char *start = s; + Char c; + do + { + c = *++s; + } + while (internal::is_name_start(c) || ('0' <= c && c <= '9')); + const char *error = FMT_NULL; + internal::Arg arg = get_arg(BasicStringRef<Char>(start, s - start), error); + if (error) + FMT_THROW(FormatError(error)); + return arg; +} + +template <typename Char, typename ArgFormatter> +const Char *BasicFormatter<Char, ArgFormatter>::format( + const Char *&format_str, const internal::Arg &arg) +{ + using internal::Arg; + const Char *s = format_str; + FormatSpec spec; + if (*s == ':') + { + if (arg.type == Arg::CUSTOM) + { + arg.custom.format(this, arg.custom.value, &s); + return s; + } + ++s; + // Parse fill and alignment. + if (Char c = *s) + { + const Char *p = s + 1; + spec.align_ = ALIGN_DEFAULT; + do + { + switch (*p) + { + case '<': + spec.align_ = ALIGN_LEFT; + break; + case '>': + spec.align_ = ALIGN_RIGHT; + break; + case '=': + spec.align_ = ALIGN_NUMERIC; + break; + case '^': + spec.align_ = ALIGN_CENTER; + break; + } + if (spec.align_ != ALIGN_DEFAULT) + { + if (p != s) + { + if (c == '}') break; + if (c == '{') + FMT_THROW(FormatError("invalid fill character '{'")); + s += 2; + spec.fill_ = c; + } + else ++s; + if (spec.align_ == ALIGN_NUMERIC) + require_numeric_argument(arg, '='); + break; + } + } + while (--p >= s); + } + + // Parse sign. + switch (*s) + { + case '+': + check_sign(s, arg); + spec.flags_ |= SIGN_FLAG | PLUS_FLAG; + break; + case '-': + check_sign(s, arg); + spec.flags_ |= MINUS_FLAG; + break; + case ' ': + check_sign(s, arg); + spec.flags_ |= SIGN_FLAG; + break; + } + + if (*s == '#') + { + require_numeric_argument(arg, '#'); + spec.flags_ |= HASH_FLAG; + ++s; + } + + // Parse zero flag. + if (*s == '0') + { + require_numeric_argument(arg, '0'); + spec.align_ = ALIGN_NUMERIC; + spec.fill_ = '0'; + ++s; + } + + // Parse width. + if ('0' <= *s && *s <= '9') + { + spec.width_ = internal::parse_nonnegative_int(s); + } + else if (*s == '{') + { + ++s; + Arg width_arg = internal::is_name_start(*s) ? + parse_arg_name(s) : parse_arg_index(s); + if (*s++ != '}') + FMT_THROW(FormatError("invalid format string")); + ULongLong value = 0; + switch (width_arg.type) + { + case Arg::INT: + if (width_arg.int_value < 0) + FMT_THROW(FormatError("negative width")); + value = width_arg.int_value; + break; + case Arg::UINT: + value = width_arg.uint_value; + break; + case Arg::LONG_LONG: + if (width_arg.long_long_value < 0) + FMT_THROW(FormatError("negative width")); + value = width_arg.long_long_value; + break; + case Arg::ULONG_LONG: + value = width_arg.ulong_long_value; + break; + default: + FMT_THROW(FormatError("width is not integer")); + } + if (value >(std::numeric_limits<int>::max)()) + FMT_THROW(FormatError("number is too big")); + spec.width_ = static_cast<int>(value); + } + + // Parse precision. + if (*s == '.') + { + ++s; + spec.precision_ = 0; + if ('0' <= *s && *s <= '9') + { + spec.precision_ = internal::parse_nonnegative_int(s); + } + else if (*s == '{') + { + ++s; + Arg precision_arg = internal::is_name_start(*s) ? + parse_arg_name(s) : parse_arg_index(s); + if (*s++ != '}') + FMT_THROW(FormatError("invalid format string")); + ULongLong value = 0; + switch (precision_arg.type) + { + case Arg::INT: + if (precision_arg.int_value < 0) + FMT_THROW(FormatError("negative precision")); + value = precision_arg.int_value; + break; + case Arg::UINT: + value = precision_arg.uint_value; + break; + case Arg::LONG_LONG: + if (precision_arg.long_long_value < 0) + FMT_THROW(FormatError("negative precision")); + value = precision_arg.long_long_value; + break; + case Arg::ULONG_LONG: + value = precision_arg.ulong_long_value; + break; + default: + FMT_THROW(FormatError("precision is not integer")); + } + if (value >(std::numeric_limits<int>::max)()) + FMT_THROW(FormatError("number is too big")); + spec.precision_ = static_cast<int>(value); + } + else + { + FMT_THROW(FormatError("missing precision specifier")); + } + if (arg.type <= Arg::LAST_INTEGER_TYPE || arg.type == Arg::POINTER) + { + FMT_THROW(FormatError( + fmt::format("precision not allowed in {} format specifier", + arg.type == Arg::POINTER ? "pointer" : "integer"))); + } + } + + // Parse type. + if (*s != '}' && *s) + spec.type_ = static_cast<char>(*s++); + } + + if (*s++ != '}') + FMT_THROW(FormatError("missing '}' in format string")); + + // Format argument. + ArgFormatter(*this, spec, s - 1).visit(arg); + return s; +} + +template <typename Char, typename AF> +void BasicFormatter<Char, AF>::format(BasicCStringRef<Char> format_str) +{ + const Char *s = format_str.c_str(); + const Char *start = s; + while (*s) + { + Char c = *s++; + if (c != '{' && c != '}') continue; + if (*s == c) + { + write(writer_, start, s); + start = ++s; + continue; + } + if (c == '}') + FMT_THROW(FormatError("unmatched '}' in format string")); + write(writer_, start, s - 1); + internal::Arg arg = internal::is_name_start(*s) ? + parse_arg_name(s) : parse_arg_index(s); + start = s = format(s, arg); + } + write(writer_, start, s); +} } // namespace fmt #if FMT_USE_USER_DEFINED_LITERALS -namespace fmt { - namespace internal { - - template <typename Char> - struct UdlFormat - { - const Char *str; - - template <typename... Args> - auto operator()(Args && ... args) const - -> decltype(format(str, std::forward<Args>(args)...)) - { - return format(str, std::forward<Args>(args)...); - } - }; - - template <typename Char> - struct UdlArg - { - const Char *str; - - template <typename T> - NamedArgWithType<Char, T> operator=(T &&value) const - { - return{ str, std::forward<T>(value) }; - } - }; - - } // namespace internal - - inline namespace literals { - - /** - \rst - C++11 literal equivalent of :func:`fmt::format`. - - **Example**:: - - using namespace fmt::literals; - std::string message = "The answer is {}"_format(42); - \endrst - */ - inline internal::UdlFormat<char> - operator"" _format(const char *s, std::size_t) - { - return{ s }; - } - inline internal::UdlFormat<wchar_t> - operator"" _format(const wchar_t *s, std::size_t) - { - return{ s }; - } - - /** - \rst - C++11 literal equivalent of :func:`fmt::arg`. - - **Example**:: - - using namespace fmt::literals; - print("Elapsed time: {s:.2f} seconds", "s"_a=1.23); - \endrst - */ - inline internal::UdlArg<char> - operator"" _a(const char *s, std::size_t) - { - return{ s }; - } - inline internal::UdlArg<wchar_t> - operator"" _a(const wchar_t *s, std::size_t) - { - return{ s }; - } - - } // inline namespace literals +namespace fmt +{ +namespace internal +{ + +template <typename Char> +struct UdlFormat +{ + const Char *str; + + template <typename... Args> + auto operator()(Args && ... args) const + -> decltype(format(str, std::forward<Args>(args)...)) + { + return format(str, std::forward<Args>(args)...); + } +}; + +template <typename Char> +struct UdlArg +{ + const Char *str; + + template <typename T> + NamedArgWithType<Char, T> operator=(T &&value) const + { + return{ str, std::forward<T>(value) }; + } +}; + +} // namespace internal + +inline namespace literals +{ + +/** +\rst +C++11 literal equivalent of :func:`fmt::format`. + +**Example**:: + +using namespace fmt::literals; +std::string message = "The answer is {}"_format(42); +\endrst +*/ +inline internal::UdlFormat<char> +operator"" _format(const char *s, std::size_t) +{ + return{ s }; +} +inline internal::UdlFormat<wchar_t> +operator"" _format(const wchar_t *s, std::size_t) +{ + return{ s }; +} + +/** +\rst +C++11 literal equivalent of :func:`fmt::arg`. + +**Example**:: + +using namespace fmt::literals; +print("Elapsed time: {s:.2f} seconds", "s"_a=1.23); +\endrst +*/ +inline internal::UdlArg<char> +operator"" _a(const char *s, std::size_t) +{ + return{ s }; +} +inline internal::UdlArg<wchar_t> +operator"" _a(const wchar_t *s, std::size_t) +{ + return{ s }; +} + +} // inline namespace literals } // namespace fmt #endif // FMT_USE_USER_DEFINED_LITERALS - // Restore warnings. +// Restore warnings. #if FMT_GCC_VERSION >= 406 # pragma GCC diagnostic pop #endif |