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/***
*strnicmp.c - compare n chars of strings, ignoring case
*
* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _strnicmp() - Compares at most n characters of two strings,
* without regard to case.
*
*Revision History:
* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
* copyright.
* 10-02-90 GJF New-style function declarator.
* 01-18-91 GJF ANSI naming.
* 10-11-91 GJF Bug fix! Comparison of final bytes must use unsigned
* chars.
* 09-27-93 CFW Avoid cast bug.
* 06-28-94 SRW Rewrite to use same ANSI specific tolower logic as x86
* assembler version is i386\strnicmp.asm
*
*******************************************************************************/
#include <cruntime.h>
#include <ctype.h>
#include <string.h>
/***
*int _strnicmp(first, last, count) - compares count char of strings, ignore case
*
*Purpose:
* Compare the two strings for lexical order. Stops the comparison
* when the following occurs: (1) strings differ, (2) the end of the
* strings is reached, or (3) count characters have been compared.
* For the purposes of the comparison, upper case characters are
* converted to lower case.
*
*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:
*
*******************************************************************************/
int _CALLTYPE1 _strnicmp (
const char * first,
const char * last,
size_t count
)
{
unsigned char f,l;
if (count) do {
f = *first++;
l = *last++;
if (f != l) {
if (f>='A' && f<='Z') {
f = f - 'A' + 'a';
}
if (l>='A' && l<='Z') {
l = l - 'A' + 'a';
}
if (f!=l) {
return f-l;
}
}
}
while (--count && f);
return(0);
}
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