File: strncmp.c

package info (click to toggle)
binutils-avr 2.26.20160125%2BAtmel3.6.2-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 365,552 kB
  • sloc: ansic: 2,480,046; asm: 892,808; exp: 188,218; cpp: 133,829; makefile: 63,886; sh: 32,212; yacc: 26,783; lisp: 16,709; xml: 7,490; perl: 6,449; python: 4,555; ada: 4,318; pascal: 3,174; lex: 2,250; cs: 879; sed: 334; f90: 298; awk: 168; objc: 134; java: 73; fortran: 43
file content (34 lines) | stat: -rw-r--r-- 638 bytes parent folder | download | duplicates (83) 
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;
}