File: strncmp.c

package info (click to toggle)
gcc-avr 1%3A5.4.0%2BAtmel3.6.2-1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 589,872 kB
  • sloc: ansic: 2,775,581; ada: 756,757; cpp: 723,977; f90: 117,673; asm: 66,898; makefile: 62,755; xml: 44,466; sh: 29,549; exp: 23,315; objc: 15,216; fortran: 10,901; pascal: 4,185; python: 4,093; perl: 2,969; awk: 2,811; ml: 2,385; cs: 879; yacc: 316; lex: 198; haskell: 112; lisp: 8
file content (34 lines) | stat: -rw-r--r-- 638 bytes parent folder | download | duplicates (76) 
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
34
 
/* 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;
}