From ecc9c5fcfa4831b290cc1a63c0346cbb0c1fcf42 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 14 Jul 2011 00:51:45 -0400 Subject: new restartable integer parsing framework. this fixes a number of bugs in integer parsing due to lazy haphazard wrapping, as well as some misinterpretations of the standard. the new parser is able to work character-at-a-time or on whole strings, making it easy to support the wide functions without unbounded space for conversion. it will also be possible to update scanf to use the new parser. --- src/stdlib/wcstoimax.c | 36 +++++++++++++++++++++++++----------- 1 file changed, 25 insertions(+), 11 deletions(-) (limited to 'src/stdlib/wcstoimax.c') diff --git a/src/stdlib/wcstoimax.c b/src/stdlib/wcstoimax.c index 59894f60..b83206b7 100644 --- a/src/stdlib/wcstoimax.c +++ b/src/stdlib/wcstoimax.c @@ -2,24 +2,38 @@ #include #include #include +#include "intparse.h" intmax_t wcstoimax(const wchar_t *s, wchar_t **p, int base) { - int sign = 0; - uintmax_t x; + struct intparse ip = {0}; + unsigned char tmp; + + if (p) *p = (wchar_t *)s; + + if (base && base-2U > 34) { + errno = EINVAL; + return 0; + } - /* Initial whitespace */ for (; iswspace(*s); s++); - /* Optional sign */ - if (*s == '-') sign = *s++; - else if (*s == '+') s++; + ip.base = base; + for (; *s<256 && (tmp=*s, __intparse(&ip, &tmp, 1)); s++); + + if (p && ip.err != EINVAL) + *p = (wchar_t *)s; + + if (ip.err) { + errno = ip.err; + if (ip.err = EINVAL) return 0; + return ip.neg ? INTMAX_MIN : INTMAX_MAX; + } - x = wcstoumax(s, p, base); - if (x > INTMAX_MAX) { - if (!sign || -x != INTMAX_MIN) + if (ip.val > INTMAX_MAX) { + if (!ip.neg || -ip.val != INTMAX_MIN) errno = ERANGE; - return sign ? INTMAX_MIN : INTMAX_MAX; + return ip.neg ? INTMAX_MIN : INTMAX_MAX; } - return sign ? -x : x; + return ip.neg ? -ip.val : ip.val; } -- cgit 1.4.1