libowfat/case/case_starts.c
2002-09-16 23:49:15 +00:00

20 lines
464 B
C

#include "case.h"
/* str_start returns 1 if the b is a prefix of a, 0 otherwise */
int case_starts(const char* a, const char* b) {
register const char* s=a;
register const char* t=b;
for (;;) {
register unsigned char x,y;
if (!*t) return 1;
x = *s - 'A';
if (x <= 'Z' - 'A') x += 'a'; else x += 'A';
y = *t - 'A';
if (y <= 'Z' - 'A') y += 'a'; else y += 'A';
if (x != y) break;
if (!x) break;
++s; ++t;
}
return 0;
}