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/* 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;
}