int strncasecmp(const char *s1, const char *s2, size_t n)
{
const unsigned char *c1 = s1, *c2 = s2;
unsigned char ch;
int d = 0;
while ( n-- ) {
/* toupper() expects an unsigned char (implicitly cast to int)
as input, and returns an int, which is exactly what we want. */
d = toupper(ch = *c1++) - toupper(*c2++);
if ( d || !ch )
break;
}
return d;
}
int strcasecmp(const char *s1, const char *s2)
{
const unsigned char *c1 = s1, *c2 = s2;
unsigned char ch;
int d = 0;
while ( 1 ) {
/* toupper() expects an unsigned char (implicitly cast to int)
as input, and returns an int, which is exactly what we want. */
d = toupper(ch = *c1++) - toupper(*c2++);
if ( d || !ch )
break;
}
return d;
}
int strcmp(const char *s1, const char *s2)
{
const unsigned char *c1 = s1, *c2 = s2;
unsigned char ch;
int d = 0;
while ( 1 ) {
d = (int)(ch = *c1++) - (int)*c2++;
if ( d || !ch )
break;
}
return d;
}
int strncmp(const char *s1, const char *s2, size_t n)
{
const unsigned char *c1 = s1, *c2 = s2;
unsigned char ch;
int d = 0;
while ( n-- ) {
d = (int)(ch = *c1++) - (int)*c2++;
if ( d || !ch )
break;
}
return d;
}