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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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strnicmp.c
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C/C++ Source or Header
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1998-06-17
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/***
*strnicmp.c - compare n chars of strings, ignoring case
*
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _strnicmp() - Compares at most n characters of two strings,
* without regard to case.
*
*******************************************************************************/
#include <cruntime.h>
#include <string.h>
#ifdef _WIN32
#include <mtdll.h>
#include <ctype.h>
#include <setlocal.h>
#include <locale.h>
#endif /* _WIN32 */
/***
*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
* size_t 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 __cdecl _strnicmp (
const char * first,
const char * last,
size_t count
)
{
int f,l;
#ifdef _MT
int local_lock_flag;
#endif /* _MT */
if ( count )
{
#if defined (_WIN32)
if ( __lc_handle[LC_CTYPE] == _CLOCALEHANDLE ) {
#endif /* defined (_WIN32) */
do {
if ( ((f = (unsigned char)(*(first++))) >= 'A') &&
(f <= 'Z') )
f -= 'A' - 'a';
if ( ((l = (unsigned char)(*(last++))) >= 'A') &&
(l <= 'Z') )
l -= 'A' - 'a';
} while ( --count && f && (f == l) );
#if defined (_WIN32)
}
else {
_lock_locale( local_lock_flag )
do {
f = _tolower_lk( (unsigned char)(*(first++)) );
l = _tolower_lk( (unsigned char)(*(last++)) );
} while (--count && f && (f == l) );
_unlock_locale( local_lock_flag )
}
#endif /* defined (_WIN32) */
return( f - l );
}
return( 0 );
}