47d027ee1a
1. my interpretation of subject sequence definition was wrong. adjust parser to conform to the standard. 2. some code for handling tail overflow case was missing (forgot to finish writing it). 3. typo (= instead of ==) caused ERANGE to wrongly behave like EINVAL
35 lines
627 B
C
35 lines
627 B
C
#include <wchar.h>
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#include <wctype.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include <errno.h>
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#include "intparse.h"
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uintmax_t wcstoumax(const wchar_t *s, wchar_t **p, int base)
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{
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const wchar_t *s1 = s;
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struct intparse ip = {0};
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if (p) *p = (wchar_t *)s;
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if (base && base-2U > 34) {
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errno = EINVAL;
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return 0;
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}
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for (; iswspace(*s); s++);
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ip.base = base;
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for (; __intparse(&ip, (char[]){(*s&-(*s<128U))}, 1); s++);
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if (p && ip.err != EINVAL)
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*p = (wchar_t *)s1 + ip.cnt;
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if (ip.err) {
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errno = ip.err;
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if (ip.err == EINVAL) return 0;
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return UINTMAX_MAX;
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}
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return ip.neg ? -ip.val : ip.val;
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}
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