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LibC: Implement wcsstr

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This commit is contained in:
Tim Schumacher 2021-09-22 08:54:23 +00:00 • committed by Brian Gianforcaro
parent 1b078f87b7
commit 5ac2e84264
3 changed files with 51 additions and 0 deletions
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20
Userland/Libraries/LibC/wchar.cpp
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@ -355,4 +355,24 @@ wchar_t* wcspbrk(const wchar_t* wcs, const wchar_t* accept)
return nullptr;
}
wchar_t* wcsstr(const wchar_t* haystack, const wchar_t* needle)
{
size_t nlen = wcslen(needle);
if (nlen == 0)
return const_cast<wchar_t*>(haystack);
size_t hlen = wcslen(haystack);
while (hlen >= nlen) {
if (wcsncmp(haystack, needle, nlen) == 0)
return const_cast<wchar_t*>(haystack);
haystack++;
hlen--;
}
return nullptr;
}
}