/***
*strncmp.c - compare first n characters of two strings
*
*	Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
*	defines strncmp() - compare first n characters of two strings
*	for lexical order.
*
*Revision History:
*	05-31-89   JCR	C version created.
*	02-27-90   GJF	Fixed calling type, #include <cruntime.h>, fixed
*			copyright.
*	10-02-90   GJF	New-style function declarator.
*	10-11-91   GJF	Bug fix! Comparison of final bytes must use unsigned
*			chars.
*
*******************************************************************************/

#include <cruntime.h>
#include <string.h>
#include <plstring.h>
#include <stdlib.h>
#include <macos\types.h>

/***
*int strncmp(first, last, count) - compare first count chars of strings
*
*Purpose:
*	Compares two strings for lexical order.  The comparison stops
*	after: (1) a difference between the strings is found, (2) the end
*	of the strings is reached, or (3) count characters have been
*	compared.
*
*Entry:
*	char *first, *last - strings to compare
*	unsigned count - maximum number of characters to compare
*
*Exit:
*	returns <0 if first < last
*	returns  0 if first == last
*	returns >0 if first > last
*
*Exceptions:
*
*******************************************************************************/
short __pascal	PLstrncmp(const unsigned char * str1, const unsigned char * str2, short num)
{
	int ret = 0;
	int len1= StrLength(str1);
	int len2= StrLength(str2);
	int count = min(len1, len2);

	if (num > count)
		{
		ret = memcmp(str1+1, str2+1, count);
		if (ret == 0)
			{
			if (len1 > len2)
				ret = 1;
			else if (len1 < len2)
				ret = -1;
			}	
		}
	else
		{
		ret = memcmp(str1+1, str2+1, num);
		}

	return (ret);
}