usr/klibc/strcasecmp.c

/*
 * strcasecmp.c
 */

#include <string.h>
#include <ctype.h>

int strcasecmp(const char *s1, const char *s2)
{
	const unsigned char *c1 = (const unsigned char *)s1;
	const unsigned char *c2 = (const unsigned char *)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;
}
1	/*
2	* strcasecmp.c
3	*/
4
5	#include <string.h>
6	#include <ctype.h>
7
8	int strcasecmp(const char s1, const char s2)
9	{
10	const unsigned char c1 = (const unsigned char )s1;
11	const unsigned char c2 = (const unsigned char )s2;
12	unsigned char ch;
13	int d = 0;
14
15	while (1) {
16	/* toupper() expects an unsigned char (implicitly cast to int)
17	as input, and returns an int, which is exactly what we want. */
18	d = toupper(ch = c1++) - toupper(c2++);
19	if (d \|\| !ch)
20	break;
21	}
22
23	return d;
24	}