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mbrtowc: Fix wrong return value when n > UINT_MAX

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mbrtowc truncates n to unsigned int when storing its copy.
If n > UINT_MAX and the locale is not POSIX, the function will
return a wrong value greater than UINT_MAX on the success path.
This commit is contained in:
Alexey Izbyshev 2023-05-26 19:34:14 +03:00 • committed by Rich Felker
parent b90841e258
commit 4653b98711
1 changed files with 1 additions and 1 deletions
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2
src/multibyte/mbrtowc.c
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@ -8,7 +8,7 @@ size_t mbrtowc(wchar_t *restrict wc, const char *restrict src, size_t n, mbstate
static unsigned internal_state;
unsigned c;
const unsigned char *s = (const void *)src;
const unsigned N = n;
const size_t N = n;
wchar_t dummy;
if (!st) st = (void *)&internal_state;