cosmopolitan/libc/str/tinystrstr.h

27 lines
1.0 KiB
C

#ifndef COSMOPOLITAN_LIBC_STR_TINYSTRSTR_H_
#define COSMOPOLITAN_LIBC_STR_TINYSTRSTR_H_
#include "libc/str/str.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
#define tinystrstr(HAYSTACK, NEEDLE) \
({ \
autotype(HAYSTACK) Haystack = (HAYSTACK); \
typeof(Haystack) Needle = (NEEDLE); \
for (;;) { \
size_t i = 0; \
for (;;) { \
if (!Needle[i]) goto Found; \
if (!Haystack[i]) break; \
if (Needle[i] != Haystack[i]) break; \
++i; \
} \
if (!*Haystack++) break; \
} \
Haystack = NULL; \
Found: \
Haystack; \
})
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_STR_TINYSTRSTR_H_ */