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/* memcmp -- compare two memory regions.
This function is in the public domain. */
/*
NAME
memcmp -- compare two memory regions
SYNOPSIS
int memcmp (const void *from, const void *to, size_t count)
DESCRIPTION
Compare two memory regions and return less than,
equal to, or greater than zero, according to lexicographical
ordering of the compared regions.
*/
#include <ansidecl.h>
#ifdef __STDC__
#include <stddef.h>
#else
#define size_t unsigned long
#endif
int
DEFUN(memcmp, (str1, str2, count),
const PTR str1 AND const PTR str2 AND size_t count)
{
register unsigned char *s1 = (unsigned char*)str1;
register unsigned char *s2 = (unsigned char*)str2;
while (count-- > 0)
{
if (*s1++ != *s2++)
return s1[-1] < s2[-1] ? -1 : 1;
}
return 0;
}
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