92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
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/***
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*wcsicmp.c - contains case-insensitive wide string comp routine _wcsicmp
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*
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* Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* contains _wcsicmp()
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*
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*Revision History:
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* 09-09-91 ETC Created from stricmp.c.
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* 12-09-91 ETC Use C for neutral locale.
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* 04-07-92 KRS Updated and ripped out _INTL switches.
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* 08-19-92 KRS Actived use of CompareStringW.
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* 08-22-92 SRW Allow INTL definition to be conditional for building ntcrt.lib
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* 09-02-92 SRW Get _INTL definition via ..\crt32.def
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* 12-15-92 KRS Added robustness to non-_INTL code. Optimize.
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* 06-02-93 SRW ignore _INTL if _NTSUBSET_ defined.
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*
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*******************************************************************************/
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#include <windows.h>
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#include <cruntime.h>
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#include <string.h>
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#include <locale.h>
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#include <ctype.h>
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#include <setlocal.h>
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#include <os2dll.h>
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/***
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*int _wcsicmp(dst, src) - compare wide-character strings, ignore case
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*
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*Purpose:
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* _wcsicmp perform a case-insensitive wchar_t string comparision.
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* _wcsicmp is independent of locale.
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*
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* *** NOTE: the comparison should be done in a neutral locale,
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* provided by the NLSAPI. ****
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*
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*Entry:
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* wchar_t *dst, *src - strings to compare
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*
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*Return:
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* <0 if dst < src
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* 0 if dst = src
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* >0 if dst > src
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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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*
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*******************************************************************************/
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int _CALLTYPE1 _wcsicmp (
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const wchar_t * dst,
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const wchar_t * src
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)
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{
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wchar_t f,l;
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int ret;
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#if defined(_INTL) && !defined(_NTSUBSET_)
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/* _mlock (_LC_CTYPE_LOCK); */
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if ((_lc_handle[LC_CTYPE] == _CLOCALEHANDLE) &&
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(_lc_codepage == _CLOCALECP))
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{
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#endif /* _INTL */
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do {
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f = ((*dst <= L'Z') && (*dst >= L'A'))
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? *dst + ((wchar_t)(L'a' - L'A'))
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: *dst;
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l = ((*src <= L'Z') && (*src >= L'A'))
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? *src + ((wchar_t)(L'a' - L'A'))
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: *src;
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dst++;
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src++;
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} while ((f) && (f == l));
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ret = (int)((unsigned int)f - (unsigned int)l);
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#if defined(_INTL) && !defined(_NTSUBSET_)
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}
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else
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{
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ret = CompareStringW(LANG_NEUTRAL,NORM_IGNORECASE,dst,-1,src,-1);
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/* map return into normal CMP area (-1,0, 1 or ERROR) */
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ret = (ret) ? (ret-2) : NLSCMPERROR;
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}
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/* _munlock (_LC_CTYPE_LOCK); */
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#endif /* _INTL */
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return ret;
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}
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