127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/***
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*strncoll.c - Collate locale strings
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*
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* Copyright (c) 1994-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Compare two 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 strnicol.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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* 10-24-94 GJF Sped up C locale, multi-thread case.
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* 12-29-94 CFW Merge non-Win32.
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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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* 08-11-98 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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* 05-17-99 PML Remove all Macintosh support.
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <string.h>
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#include <windows.h>
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#include <stdlib.h>
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#include <malloc.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 _strncoll() - Collate locale strings
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*
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*Purpose:
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* Compare two 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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*Entry:
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* const char *s1 = pointer to the first string
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* const char *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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* Less than 0 = first string less than second string
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* 0 = strings are equal
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* Greater than 0 = first string greater than second string
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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 _strncoll (
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const char *_string1,
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const char *_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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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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return strncmp(_string1, _string2, count);
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#ifdef _MT
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if ( 0 == (ret = __crtCompareStringA( ptloci->lc_handle[LC_COLLATE],
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#else
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if ( 0 == (ret = __crtCompareStringA( __lc_handle[LC_COLLATE],
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#endif
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SORT_STRINGSORT,
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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 strncmp(_string1, _string2, count);
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#endif
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}
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