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Kernel+LibC: Implement 'memmem'

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This commit adds an implementation of memmem, using the Bitap text
search algorithm for needles smaller than 32 bytes, and a naive loop
search for longer needles.
This commit is contained in:
AnotherTest 2020-07-31 16:26:33 +04:30 • committed by Andreas Kling
parent ad35436786
commit 1ad51325ad
5 changed files with 178 additions and 0 deletions
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Kernel/StdLib.h
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@ -54,6 +54,7 @@ char* strdup(const char*);
int memcmp(const void*, const void*, size_t);
char* strrchr(const char* str, int ch);
void* memmove(void* dest, const void* src, size_t n);
const void* memmem(const void* haystack, size_t, const void* needle, size_t);
inline u16 ntohs(u16 w) { return (w & 0xff) << 8 | ((w >> 8) & 0xff); }
inline u16 htons(u16 w) { return (w & 0xff) << 8 | ((w >> 8) & 0xff); }