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71 lines
1.7 KiB
71 lines
1.7 KiB
/***
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*strncmp.c - compare first n characters of two strings
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*
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* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines strncmp() - compare first n characters of two strings
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* for lexical order.
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*
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*Revision History:
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* 05-31-89 JCR C version created.
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* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
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* copyright.
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* 10-02-90 GJF New-style function declarator.
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* 10-11-91 GJF Bug fix! Comparison of final bytes must use unsigned
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* chars.
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <string.h>
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#include <plstring.h>
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#include <stdlib.h>
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#include <macos\types.h>
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/***
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*int strncmp(first, last, count) - compare first count chars of strings
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*
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*Purpose:
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* Compares two strings for lexical order. The comparison stops
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* after: (1) a difference between the strings is found, (2) the end
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* of the strings is reached, or (3) count characters have been
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* compared.
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*
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*Entry:
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* char *first, *last - strings to compare
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* unsigned count - maximum number of characters to compare
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*
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*Exit:
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* returns <0 if first < last
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* returns 0 if first == last
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* returns >0 if first > last
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*
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*Exceptions:
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*
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*******************************************************************************/
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short __pascal PLstrncmp(const unsigned char * str1, const unsigned char * str2, short num)
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{
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int ret = 0;
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int len1= StrLength(str1);
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int len2= StrLength(str2);
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int count = min(len1, len2);
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if (num > count)
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{
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ret = memcmp(str1+1, str2+1, count);
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if (ret == 0)
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{
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if (len1 > len2)
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ret = 1;
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else if (len1 < len2)
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ret = -1;
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}
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}
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else
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{
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ret = memcmp(str1+1, str2+1, num);
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}
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return (ret);
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}
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