diff options
Diffstat (limited to 'winsup/cygwin/miscfuncs.cc')
| -rw-r--r-- | winsup/cygwin/miscfuncs.cc | 148 |
1 files changed, 132 insertions, 16 deletions
diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc index c5d46fbf0..a6fec0ddc 100644 --- a/winsup/cygwin/miscfuncs.cc +++ b/winsup/cygwin/miscfuncs.cc @@ -11,8 +11,13 @@ details. */ #include "winsup.h" #include "cygerrno.h" #include <sys/errno.h> +#include <sys/uio.h> +#include <assert.h> +#include <limits.h> +#include <winbase.h> +#include <winnls.h> -/********************** String Helper Functions ************************/ +long tls_ix = -1; const char case_folded_lower[] NO_COPY = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, @@ -116,15 +121,21 @@ strcasestr (const char *searchee, const char *lookfor) } int __stdcall -check_null_empty_str (const char *name) +check_null_str (const char *name) { - if (!name || IsBadStringPtr (name, MAX_PATH)) - return EFAULT; + if (name && !IsBadStringPtr (name, MAX_PATH)) + return 0; + + return EFAULT; +} - if (!*name) - return ENOENT; +int __stdcall +check_null_empty_str (const char *name) +{ + if (name && !IsBadStringPtr (name, MAX_PATH)) + return !*name ? ENOENT : 0; - return 0; + return EFAULT; } int __stdcall @@ -137,19 +148,124 @@ check_null_empty_str_errno (const char *name) } int __stdcall -__check_null_invalid_struct (const void *s, unsigned sz) +check_null_str_errno (const char *name) +{ + int __err; + if ((__err = check_null_str (name))) + set_errno (__err); + return __err; +} + +int __stdcall +__check_null_invalid_struct (void *s, unsigned sz) { - if (!s || IsBadWritePtr ((void *) s, sz)) - return EFAULT; + if (s && !IsBadWritePtr (s, sz)) + return 0; - return 0; + return EFAULT; } int __stdcall -__check_null_invalid_struct_errno (const void *s, unsigned sz) +__check_null_invalid_struct_errno (void *s, unsigned sz) { - int __err; - if ((__err = __check_null_invalid_struct (s, sz))) - set_errno (__err); - return __err; + int err; + if ((err = __check_null_invalid_struct (s, sz))) + set_errno (err); + return err; +} + +int __stdcall +__check_invalid_read_ptr_errno (const void *s, unsigned sz) +{ + if (s && !IsBadReadPtr (s, sz)) + return 0; + return set_errno (EFAULT); +} + +ssize_t +check_iovec_for_read (const struct iovec *iov, int iovcnt) +{ + if (iovcnt <= 0 || iovcnt > IOV_MAX) + { + set_errno (EINVAL); + return -1; + } + + if (__check_invalid_read_ptr_errno (iov, iovcnt * sizeof (*iov))) + return -1; + + size_t tot = 0; + + while (iovcnt != 0) + { + if (iov->iov_len > SSIZE_MAX || (tot += iov->iov_len) > SSIZE_MAX) + { + set_errno (EINVAL); + return -1; + } + + if (iov->iov_len + && __check_null_invalid_struct_errno (iov->iov_base, iov->iov_len)) + return -1; + + iov += 1; + iovcnt -= 1; + } + + assert (tot <= SSIZE_MAX); + + return (ssize_t) tot; +} + +ssize_t +check_iovec_for_write (const struct iovec *iov, int iovcnt) +{ + if (iovcnt <= 0 || iovcnt > IOV_MAX) + { + set_errno (EINVAL); + return -1; + } + + if (__check_invalid_read_ptr_errno (iov, iovcnt * sizeof (*iov))) + return -1; + + size_t tot = 0; + + while (iovcnt != 0) + { + if (iov->iov_len > SSIZE_MAX || (tot += iov->iov_len) > SSIZE_MAX) + { + set_errno (EINVAL); + return -1; + } + + if (iov->iov_len + && __check_invalid_read_ptr_errno (iov->iov_base, iov->iov_len)) + return -1; + + iov += 1; + iovcnt -= 1; + } + + assert (tot <= SSIZE_MAX); + + return (ssize_t) tot; +} + +UINT +get_cp () +{ + return current_codepage == ansi_cp ? GetACP() : GetOEMCP(); +} + +int __stdcall +sys_wcstombs (char *tgt, const WCHAR *src, int len) +{ + return WideCharToMultiByte (get_cp (), 0, src, -1, tgt, len, NULL, NULL); +} + +int __stdcall +sys_mbstowcs (WCHAR *tgt, const char *src, int len) +{ + return MultiByteToWideChar (get_cp (), 0, src, -1, tgt, len); } |