jehanne/sys/src/lib/jehanne/port/cistrcmp.c

36 lines
759 B
C

/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <libc.h>
int
jehanne_cistrcmp(const char *s1, const char *s2)
{
int c1, c2;
while(*s1){
c1 = *(uint8_t*)s1++;
c2 = *(uint8_t*)s2++;
if(c1 == c2)
continue;
if(c1 >= 'A' && c1 <= 'Z')
c1 -= 'A' - 'a';
if(c2 >= 'A' && c2 <= 'Z')
c2 -= 'A' - 'a';
if(c1 != c2)
return c1 - c2;
}
return -*s2;
}