147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
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/***
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*wcsnicoll.c - Collate wide-character locale strings without regard to case
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*
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* Copyright (c) 1988-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Compare two wchar_t strings using the locale LC_COLLATE information
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* without regard to case.
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* Compares at most n characters of two strings.
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*
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*Revision History:
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* 01-13-94 CFW Created from wcsicoll.c.
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* 02-07-94 CFW POSIXify.
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* 04-11-93 CFW Change NLSCMPERROR to _NLCMPERROR.
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* 05-09-94 CFW Fix !_INTL case.
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* 05-26-94 CFW If count is zero, return EQUAL.
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* 09-06-94 CFW Remove _INTL switch.
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* 10-25-94 GJF Sped up C locale, multi-thread case.
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* 09-26-95 GJF New locking macro, and scheme, for functions which
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* reference the locale.
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* 10-30-95 GJF Specify SORT_STRINGSORT to CompareString.
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* 07-16-96 SKS Added missing call to _unlock_locale()
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* 11-24-97 GJF Removed bogus codepage determination.
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* 01-12-98 GJF Use _lc_collate_cp codepage.
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* 08-27-98 GJF Revised multithread support based on threadlocinfo
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* struct.
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* 01-04-99 GJF Changes for 64-bit size_t.
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* 04-30-99 PML Minor cleanup as part of 64-bit merge.
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*
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*******************************************************************************/
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#ifndef _POSIX_
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#include <cruntime.h>
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#include <windows.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <locale.h>
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#include <setlocal.h>
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#include <mtdll.h>
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#include <errno.h>
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#include <awint.h>
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/***
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*int _wcsnicoll() - Collate wide-character locale strings without regard to case
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*
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*Purpose:
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* Compare two wchar_t strings using the locale LC_COLLATE information
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* without regard to case.
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* Compares at most n characters of two strings.
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* In the C locale, _wcsicmp() is used to make the comparison.
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*
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*Entry:
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* const wchar_t *s1 = pointer to the first string
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* const wchar_t *s2 = pointer to the second string
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* size_t count - maximum number of characters to compare
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*
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*Exit:
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* -1 = first string less than second string
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* 0 = strings are equal
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* 1 = first string greater than second string
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* This range of return values may differ from other *cmp/*coll functions.
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*
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*Exceptions:
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* _NLSCMPERROR = error
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* errno = EINVAL
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*
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*******************************************************************************/
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int __cdecl _wcsnicoll (
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const wchar_t *_string1,
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const wchar_t *_string2,
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size_t count
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)
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{
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#if !defined(_NTSUBSET_)
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int ret;
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#ifdef _MT
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pthreadlocinfo ptloci;
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#endif
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if (!count)
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return 0;
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if ( count > INT_MAX ) {
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errno = EINVAL;
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return _NLSCMPERROR;
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}
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#ifdef _MT
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ptloci = _getptd()->ptlocinfo;
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if ( ptloci != __ptlocinfo )
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ptloci = __updatetlocinfo();
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#endif
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#ifdef _MT
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if ( ptloci->lc_handle[LC_COLLATE] == _CLOCALEHANDLE )
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#else
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if ( __lc_handle[LC_COLLATE] == _CLOCALEHANDLE )
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#endif
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{
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wchar_t f, l;
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do {
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f = __ascii_towlower(*_string1);
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l = __ascii_towlower(*_string2);
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_string1++;
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_string2++;
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} while ( (--count) && f && (f == l) );
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return (int)(f - l);
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}
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#ifdef _MT
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if ( 0 == (ret = __crtCompareStringW( ptloci->lc_handle[LC_COLLATE],
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#else
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if ( 0 == (ret = __crtCompareStringW( __lc_handle[LC_COLLATE],
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#endif
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SORT_STRINGSORT | NORM_IGNORECASE,
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_string1,
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(int)count,
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_string2,
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(int)count,
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#ifdef _MT
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ptloci->lc_collate_cp )) )
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#else
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__lc_collate_cp )) )
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#endif
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{
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errno = EINVAL;
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return _NLSCMPERROR;
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}
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return (ret - 2);
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#else
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return _wcsnicmp(_string1, _string2, count);
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#endif
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}
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#endif /* _POSIX_ */
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