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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [libiberty/] [strncmp.c] - Rev 866

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/* 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;
}
 

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