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LibC: Fix up mblen

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Tim Schumacher 2021-10-22 00:35:14 +02:00 • committed by Brian Gianforcaro
parent 8df6955838
commit 79bcfa967b
2 changed files with 50 additions and 3 deletions
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20
Userland/Libraries/LibC/stdlib.cpp
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@ -872,10 +872,24 @@ lldiv_t lldiv(long long numerator, long long denominator)
int mblen(char const* s, size_t n)
{
// FIXME: Implement locale support
if (!s)
// POSIX: Equivalent to mbtowc(NULL, s, n), but we mustn't change the state of mbtowc.
static mbstate_t internal_state = {};
// Reset the internal state and ask whether we have shift states.
if (s == nullptr) {
internal_state = {};
return 0;
return (MB_CUR_MAX > n) ? n : MB_CUR_MAX;
}
size_t ret = mbrtowc(nullptr, s, n, &internal_state);
// Incomplete characters get returned as illegal sequence.
if (ret == -2ul) {
errno = EILSEQ;
return -1;
}
return ret;
}
size_t mbstowcs(wchar_t* pwcs, const char* s, size_t n)