1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
/*
* strncasecmp.c
*/
#include <string.h>
#include <ctype.h>
int strncasecmp(const char *s1, const char *s2, size_t n)
{
const unsigned char *c1 = (const unsigned char *)s1;
const unsigned char *c2 = (const unsigned char *)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;
}
|
