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Fold LIBC_ALG into LIBC_MEM

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Justine Tunney 2022-08-13 08:32:34 -07:00
parent 7cf66bc161
commit 17aea99bb3
162 changed files with 265 additions and 430 deletions
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33
libc/mem/bisect.internal.h Normal file
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#ifndef COSMOPOLITAN_LIBC_ALG_BISECT_H_
#define COSMOPOLITAN_LIBC_ALG_BISECT_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
forceinline void *bisect(const void *k, const void *data, size_t n, size_t size,
int cmp(const void *a, const void *b, void *arg),
void *arg) {
int c;
const char *p;
ssize_t m, l, r;
if (n) {
l = 0;
r = n - 1;
p = data;
while (l <= r) {
m = (l & r) + ((l ^ r) >> 1);
c = cmp(k, p + m * size, arg);
if (c > 0) {
l = m + 1;
} else if (c < 0) {
r = m - 1;
} else {
return (char *)p + m * size;
}
}
}
return NULL;
}
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_ALG_BISECT_H_ */