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LibC: Implement mbsnrtowcs

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This commit is contained in:
Tim Schumacher 2021-10-22 01:38:29 +02:00 • committed by Brian Gianforcaro
parent 552ae77f0d
commit 89afd4d063
2 changed files with 63 additions and 5 deletions
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29
Userland/Libraries/LibC/wchar.cpp
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@ -534,7 +534,7 @@ size_t wcsnrtombs(char* dest, const wchar_t** src, size_t nwc, size_t len, mbsta
return written;
}
size_t mbsrtowcs(wchar_t* dst, const char** src, size_t len, mbstate_t* ps)
size_t mbsnrtowcs(wchar_t* dst, const char** src, size_t nms, size_t len, mbstate_t* ps)
{
static mbstate_t _anonymous_state = {};
@ -543,8 +543,21 @@ size_t mbsrtowcs(wchar_t* dst, const char** src, size_t len, mbstate_t* ps)
size_t written = 0;
while (written < len || !dst) {
// End of source buffer, no incomplete character.
// src continues to point to the next byte.
if (nms == 0) {
return written;
}
// Convert next multibyte to wchar.
size_t ret = mbrtowc(dst, *src, MB_LEN_MAX, ps);
size_t ret = mbrtowc(dst, *src, nms, ps);
// Multibyte sequence is incomplete.
if (ret == -2ul) {
// Point just past the last processed byte.
*src += nms;
return written;
}
// Multibyte sequence is invalid.
if (ret == -1ul) {
@ -559,6 +572,7 @@ size_t mbsrtowcs(wchar_t* dst, const char** src, size_t len, mbstate_t* ps)
}
*src += ret;
nms -= ret;
written += 1;
if (dst)
dst += 1;
@ -588,9 +602,14 @@ size_t wcsrtombs(char* dest, const wchar_t** src, size_t len, mbstate_t* ps)
return wcsnrtombs(dest, src, SIZE_MAX, len, ps);
}
size_t mbsnrtowcs(wchar_t*, const char**, size_t, size_t, mbstate_t*)
size_t mbsrtowcs(wchar_t* dst, const char** src, size_t len, mbstate_t* ps)
{
dbgln("FIXME: Implement mbsnrtowcs()");
TODO();
static mbstate_t anonymous_state = {};
if (ps == nullptr)
ps = &anonymous_state;
// SIZE_MAX is as close as we are going to get to "unlimited".
return mbsnrtowcs(dst, src, SIZE_MAX, len, ps);
}
}