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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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wcscoll.c
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1998-06-17
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/***
*wcscoll.c - Collate wide-character locale strings
*
* Copyright (c) 1988-1998, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Compare two wchar_t strings using the locale LC_COLLATE information.
*
*******************************************************************************/
#include <cruntime.h>
#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <setlocal.h>
#include <mtdll.h>
#include <errno.h>
#include <awint.h>
/***
*int wcscoll() - Collate wide-character locale strings
*
*Purpose:
* Compare two wchar_t strings using the locale LC_COLLATE information.
* In the C locale, wcscmp() is used to make the comparison.
*
*Entry:
* const wchar_t *s1 = pointer to the first string
* const wchar_t *s2 = pointer to the second string
*
*Exit:
* -1 = first string less than second string
* 0 = strings are equal
* 1 = first string greater than second string
* This range of return values may differ from other *cmp/*coll functions.
*
*Exceptions:
* _NLSCMPERROR = error
* errno = EINVAL
*
*******************************************************************************/
int __cdecl wcscoll (
const wchar_t *_string1,
const wchar_t *_string2
)
{
int ret;
#if defined (_MT)
int local_lock_flag;
#endif /* defined (_MT) */
if (__lc_handle[LC_COLLATE] == _CLOCALEHANDLE) {
return (wcscmp(_string1, _string2));
}
_lock_locale( local_lock_flag )
#if defined (_MT)
if (__lc_handle[LC_COLLATE] == _CLOCALEHANDLE) {
_unlock_locale( local_lock_flag )
return (wcscmp(_string1, _string2));
}
#endif /* defined (_MT) */
if ( 0 == (ret = __crtCompareStringW( __lc_handle[LC_COLLATE],
SORT_STRINGSORT,
_string1,
-1,
_string2,
-1,
__lc_collate_cp)) )
{
_unlock_locale( local_lock_flag )
errno = EINVAL;
return _NLSCMPERROR;
}
_unlock_locale( local_lock_flag )
return (ret - 2);
}