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LibC: add strcasestr to string.h

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This commit is contained in:
DcraftBg
2026-04-17 21:04:31 +03:00
committed by Bananymous
parent 5fce3b64cc
commit f527aca9d0
2 changed files with 12 additions and 0 deletions
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1
userspace/libraries/LibC/include/string.h
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@@ -46,6 +46,7 @@ char* strsep(char** __restrict stringp, const char* __restrict delim);
char* strsignal(int signum);
size_t strspn(const char* s1, const char* s2);
char* strstr(const char* s1, const char* s2);
char* strcasestr(const char* haystack, const char* needle);
char* strtok(char* __restrict s, const char* __restrict sep);
char* strtok_r(char* __restrict s, const char* __restrict sep, char** __restrict state);
size_t strxfrm(char* __restrict s1, const char* __restrict s2, size_t n);

11
userspace/libraries/LibC/string.cpp
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@@ -304,6 +304,17 @@ char* strstr(const char* haystack, const char* needle)
return nullptr;
}
char* strcasestr(const char* haystack, const char* needle)
{
const size_t needle_len = strlen(needle);
if (needle_len == 0)
return const_cast<char*>(haystack);
for (size_t i = 0; haystack[i]; i++)
if (strncasecmp(haystack + i, needle, needle_len) == 0)
return const_cast<char*>(haystack + i);
return nullptr;
}
#define CHAR_UCHAR(ch) \
static_cast<unsigned char>(ch)