/* memcmp.c - memory compare file for string *//* Copyright 1992-1993 Wind River Systems, Inc. *//*modification history--------------------01c,25feb93,jdi  documentation cleanup for 5.1.01b,20sep92,smb  documentation additions01a,08jul92,smb  written and documented.*//*DESCRIPTIONINCLUDE FILE: string.hSEE ALSO: American National Standard X3.159-1989NOMANUAL*/#include "vxWorks.h"#include "string.h"/********************************************************************************* memcmp - compare two blocks of memory (ANSI)** This routine compares successive elements from two arrays of `unsigned char',* beginning at the addresses <s1> and <s2> (both of size <n>), until it finds* elements that are not equal.** INCLUDE FILES: string.h** RETURNS:* If all elements are equal, zero.  If elements differ and the differing* element from <s1> is greater than the element from <s2>, the routine* returns a positive number; otherwise, it returns a negative number.*/int memcmp    (    const void * s1,		/* array 1 */    const void * s2,		/* array 2 */    size_t       n		/* size of memory to compare */    )    {    const unsigned char *p1;    const unsigned char *p2;    /* size of memory is zero */    if (n == 0)	return (0);    /* compare array 2 into array 1 */    p1 = s1;    p2 = s2;    while (*p1++ == *p2++)	{	if (--n == 0)	    return (0);        }    return ((*--p1) - (*--p2));    }