mirror of
https://github.com/fluencelabs/musl
synced 2025-06-28 22:22:01 +00:00
ecc9c5fcfa
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.
36 lines
611 B
C
36 lines
611 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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struct intparse ip = {0};
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unsigned char tmp;
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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 (; *s<256 && (tmp=*s, __intparse(&ip, &tmp, 1)); s++);
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if (p && ip.err != EINVAL)
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*p = (wchar_t *)s;
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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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