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118 lines
3.0 KiB
118 lines
3.0 KiB
/***
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*wcsncoll.c - Collate wide-character locale strings
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*
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* Copyright (c) 1994-1995, 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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* Compares at most n characters of two strings.
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*
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*Revision History:
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* 05-09-94 CFW Created from wcsnicoll.c.
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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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*
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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 <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 _wcsncoll() - Collate wide-character locale strings
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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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* Compares at most n characters of two strings.
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* In the C locale, _wcsncmp() 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 _wcsncoll (
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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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int coll_codepage;
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WCHAR wcstmp[MAX_CP_LEN];
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#if defined(_MT) && !defined(DLL_FOR_WIN32S)
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int local_lock_flag;
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#endif
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if (!count)
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return 0;
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if (__lc_handle[LC_COLLATE] == _CLOCALEHANDLE) {
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return wcsncmp(_string1, _string2, count);
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}
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_lock_locale( local_lock_flag )
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#if defined(_MT) && !defined(DLL_FOR_WIN32S)
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if (__lc_handle[LC_COLLATE] == _CLOCALEHANDLE) {
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_unlock_locale( local_lock_flag )
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return wcsncmp(_string1, _string2, count);
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}
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#endif
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/*
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* Must use default code page for the LC_COLLATE category for
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* MB/WC conversion inside __crtxxx().
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*/
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if (__crtGetLocaleInfoW(__lc_handle[LC_COLLATE], LOCALE_IDEFAULTCODEPAGE,
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wcstmp, MAX_CP_LEN, 0) == 0)
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return _NLSCMPERROR;
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coll_codepage = (int)wcstol(wcstmp, NULL, 10);
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if (0 == (ret = __crtCompareStringW(__lc_handle[LC_COLLATE],
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SORT_STRINGSORT, _string1, count, _string2, count, coll_codepage)))
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{
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_unlock_locale( local_lock_flag )
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errno = EINVAL;
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return _NLSCMPERROR;
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}
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_unlock_locale( local_lock_flag )
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return (ret - 2);
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#else
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return wcsncmp(_string1, _string2, count);
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#endif
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}
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#endif /* _POSIX_ */
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