17 lines
548 B
C
17 lines
548 B
C
#include "byte.h"
|
|
|
|
/* byte_chr returns the smallest integer i between 0 and len-1
|
|
* inclusive such that one[i] equals needle, or len if not found. */
|
|
size_t byte_chr(const void* haystack, size_t len, char needle) {
|
|
register char c=needle;
|
|
register const char* s=haystack;
|
|
register const char* t=s+len;
|
|
for (;;) {
|
|
if (s==t) break; if (*s==c) break; ++s;
|
|
if (s==t) break; if (*s==c) break; ++s;
|
|
if (s==t) break; if (*s==c) break; ++s;
|
|
if (s==t) break; if (*s==c) break; ++s;
|
|
}
|
|
return (size_t)(s-(const char*)haystack);
|
|
}
|