File: strncmp.c

package info (click to toggle)
gccxml 0.9.0%2Bcvs20080525-1
  • links: PTS
  • area: main
  • in suites: lenny
  • size: 78,840 kB
  • ctags: 72,674
  • sloc: ansic: 749,255; cpp: 33,564; asm: 26,833; sh: 5,161; makefile: 4,695; lex: 589; awk: 566; perl: 334; yacc: 271; pascal: 86; python: 18
file content (33 lines) | stat: -rw-r--r-- 648 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
 
/* strncmp -- compare two strings, stop after n bytes.
   This function is in the public domain.  */

/*

@deftypefn Supplemental int strncmp (const char *@var{s1}, const char *@var{s2}, size_t @var{n})

Compares the first @var{n} bytes of two strings, returning a value as
@code{strcmp}.

@end deftypefn

*/

#include <ansidecl.h>
#include <stddef.h>

int
strncmp(const char *s1, const char *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;
}