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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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src
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wcsicmp.c
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C/C++ Source or Header
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1998-06-17
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/***
*wcsicmp.c - contains case-insensitive wide string comp routine _wcsicmp
*
* Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* contains _wcsicmp()
*
*******************************************************************************/
#include <cruntime.h>
#include <setlocal.h>
#include <string.h>
#include <locale.h>
#include <ctype.h>
#include <setlocal.h>
#include <mtdll.h>
/***
*int _wcsicmp(dst, src) - compare wide-character strings, ignore case
*
*Purpose:
* _wcsicmp perform a case-insensitive wchar_t string comparision.
* _wcsicmp is independent of locale.
*
*Entry:
* wchar_t *dst, *src - strings to compare
*
*Return:
* <0 if dst < src
* 0 if dst = src
* >0 if dst > src
* This range of return values may differ from other *cmp/*coll functions.
*
*Exceptions:
*
*******************************************************************************/
int __cdecl _wcsicmp (
const wchar_t * dst,
const wchar_t * src
)
{
wchar_t f,l;
#if defined (_MT)
int local_lock_flag;
#endif /* defined (_MT) */
if ( __lc_handle[LC_CTYPE] == _CLOCALEHANDLE ) {
do {
f = ((*dst <= L'Z') && (*dst >= L'A'))
? *dst + L'a' - L'A'
: *dst;
l = ((*src <= L'Z') && (*src >= L'A'))
? *src + L'a' - L'A'
: *src;
dst++;
src++;
} while ( (f) && (f == l) );
}
else {
_lock_locale( local_lock_flag );
do {
f = _towlower_lk( (unsigned short)(*(dst++)) );
l = _towlower_lk( (unsigned short)(*(src++)) );
} while ( (f) && (f == l) );
_unlock_locale( local_lock_flag )
}
return (int)(f - l);
}