mirror of
https://gcc.gnu.org/git/gcc.git
synced 2024-12-28 13:34:59 +08:00
29 lines
494 B
C
29 lines
494 B
C
|
/* strncmp -- compare two strings, stop after n bytes.
|
||
|
|
This function is in the public domain. */
|
||
|
|
|
||
|
|
#include <ansidecl.h>
|
||
|
|
#ifdef __STDC__
|
||
|
|
#include <stddef.h>
|
||
|
|
#else
|
||
|
|
#define size_t unsigned long
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int
|
||
|
|
strncmp(s1, s2, n)
|
||
|
|
const char *s1, *s2;
|
||
|
|
register size_t n;
|
||
|
|
{
|
||
|
|
register unsigned char u1, u2;
|
||
|
|
|
||
|
|
while (n-- > 0)
|
||
|
|
{
|
||
|
|
u1 = (unsigned char) *s1++;
|
||
|
|
u2 = (unsigned char) *s2++;
|
||
|
|
if (u1 != u2)
|
||
|
|
return u1 - u2;
|
||
|
|
if (u1 == '\0')
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|