diff options
Diffstat (limited to 'newlib/libc/stdlib/strtoll.c')
| -rw-r--r-- | newlib/libc/stdlib/strtoll.c | 137 |
1 files changed, 128 insertions, 9 deletions
diff --git a/newlib/libc/stdlib/strtoll.c b/newlib/libc/stdlib/strtoll.c index 3ad8199a0..e61a62a7d 100644 --- a/newlib/libc/stdlib/strtoll.c +++ b/newlib/libc/stdlib/strtoll.c @@ -1,18 +1,29 @@ /* FUNCTION - <<strtoll>>---string to long long + <<strtoll>>, <<strtoll_l>>---string to long long INDEX strtoll + +INDEX + strtoll_l + INDEX _strtoll_r ANSI_SYNOPSIS #include <stdlib.h> - long long strtoll(const char *restrict <[s]>, char **restrict <[ptr]>,int <[base]>); + long long strtoll(const char *restrict <[s]>, char **restrict <[ptr]>, + int <[base]>); + + #include <stdlib.h> + long long strtoll_l(const char *restrict <[s]>, + char **restrict <[ptr]>, int <[base]>, + locale_t <[locale]>); long long _strtoll_r(void *<[reent]>, - const char *restrict <[s]>, char **restrict <[ptr]>,int <[base]>); + const char *restrict <[s]>, + char **restrict <[ptr]>, int <[base]>); TRAD_SYNOPSIS #include <stdlib.h> @@ -67,18 +78,24 @@ If the subject string is empty (or not in acceptable form), no conversion is performed and the value of <[s]> is stored in <[ptr]> (if <[ptr]> is not <<NULL>>). +<<strtoll_l>> is like <<strtoll>> but performs the conversion based on the +locale specified by the locale object locale. If <[locale]> is +LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined. + The alternate function <<_strtoll_r>> is a reentrant version. The extra argument <[reent]> is a pointer to a reentrancy structure. RETURNS -<<strtoll>> returns the converted value, if any. If no conversion was -made, 0 is returned. +<<strtoll>>, <<strtoll_l>> return the converted value, if any. If no +conversion was made, 0 is returned. -<<strtoll>> returns <<LONG_LONG_MAX>> or <<LONG_LONG_MIN>> if the magnitude of -the converted value is too large, and sets <<errno>> to <<ERANGE>>. +<<strtoll>>, <<strtoll_l>> return <<LONG_LONG_MAX>> or <<LONG_LONG_MIN>> +if the magnitude of the converted value is too large, and sets <<errno>> +to <<ERANGE>>. PORTABILITY <<strtoll>> is ANSI. +<<strtoll_l>> is a GNU extension. No supporting OS subroutines are required. */ @@ -116,23 +133,125 @@ No supporting OS subroutines are required. * SUCH DAMAGE. */ - +#define _GNU_SOURCE #include <_ansi.h> #include <limits.h> #include <ctype.h> #include <errno.h> #include <stdlib.h> #include <reent.h> +#include "../locale/setlocale.h" + +/* + * Convert a string to a long long integer. + */ +static long long +_strtoll_l (struct _reent *rptr, _CONST char *__restrict nptr, + char **__restrict endptr, int base, locale_t loc) +{ + register const unsigned char *s = (const unsigned char *)nptr; + register unsigned long long acc; + register int c; + register unsigned long long cutoff; + register int neg = 0, any, cutlim; + + /* + * Skip white space and pick up leading +/- sign if any. + * If base is 0, allow 0x for hex and 0 for octal, else + * assume decimal; if base is already 16, allow 0x. + */ + do { + c = *s++; + } while (isspace_l(c, loc)); + if (c == '-') { + neg = 1; + c = *s++; + } else if (c == '+') + c = *s++; + if ((base == 0 || base == 16) && + c == '0' && (*s == 'x' || *s == 'X')) { + c = s[1]; + s += 2; + base = 16; + } + if (base == 0) + base = c == '0' ? 8 : 10; + + /* + * Compute the cutoff value between legal numbers and illegal + * numbers. That is the largest legal value, divided by the + * base. An input number that is greater than this value, if + * followed by a legal input character, is too big. One that + * is equal to this value may be valid or not; the limit + * between valid and invalid numbers is then based on the last + * digit. For instance, if the range for longs is + * [-2147483648..2147483647] and the input base is 10, + * cutoff will be set to 214748364 and cutlim to either + * 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated + * a value > 214748364, or equal but the next digit is > 7 (or 8), + * the number is too big, and we will return a range error. + * + * Set any if any `digits' consumed; make it negative to indicate + * overflow. + */ + cutoff = neg ? -(unsigned long long)LONG_LONG_MIN : LONG_LONG_MAX; + cutlim = cutoff % (unsigned long long)base; + cutoff /= (unsigned long long)base; + for (acc = 0, any = 0;; c = *s++) { + if (c >= '0' && c <= '9') + c -= '0'; + else if (c >= 'A' && c <= 'Z') + c -= 'A' - 10; + else if (c >= 'a' && c <= 'z') + c -= 'a' - 10; + else + break; + if (c >= base) + break; + if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim)) + any = -1; + else { + any = 1; + acc *= base; + acc += c; + } + } + if (any < 0) { + acc = neg ? LONG_LONG_MIN : LONG_LONG_MAX; + rptr->_errno = ERANGE; + } else if (neg) + acc = -acc; + if (endptr != 0) + *endptr = (char *) (any ? (char *)s - 1 : nptr); + return (acc); +} + +long long +_DEFUN (_strtoll_r, (rptr, nptr, endptr, base), + struct _reent *rptr _AND + _CONST char *__restrict nptr _AND + char **__restrict endptr _AND + int base) +{ + return _strtoll_l (rptr, nptr, endptr, base, __get_current_locale ()); +} #ifndef _REENT_ONLY long long +strtoll_l (const char *__restrict s, char **__restrict ptr, int base, + locale_t loc) +{ + return _strtoll_l (_REENT, s, ptr, base, loc); +} + +long long _DEFUN (strtoll, (s, ptr, base), _CONST char *__restrict s _AND char **__restrict ptr _AND int base) { - return _strtoll_r (_REENT, s, ptr, base); + return _strtoll_l (_REENT, s, ptr, base, __get_current_locale ()); } #endif |