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131 lines
3.6 KiB
131 lines
3.6 KiB
/***
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*wcslwr.c - routine to map upper-case characters in a wchar_t string
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* to lower-case
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*
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* Copyright (c) 1985-1995, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Converts all the upper case characters in a wchar_t string
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* to lower case, in place.
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*
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*Revision History:
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* 09-09-91 ETC Created from strlwr.c.
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* 04-06-92 KRS Make work without _INTL also.
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* 08-19-92 KRS Activate NLS support.
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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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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 06-02-93 SRW ignore _INTL if _NTSUBSET_ defined.
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* 09-15-93 CFW Use ANSI conformant "__" names.
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* 09-16-93 GJF Merged NT SDK and Cuda versions.
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* 09-22-93 CFW Use __crtxxx internal NLS API wrapper.
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* 11-09-93 CFW Add code page for __crtxxx().
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* 02-07-94 CFW POSIXify.
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* 09-06-94 CFW Remove _INTL switch.
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* 10-25-94 GJF Sped up C locale.
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* 01-10-95 CFW Debug CRT allocs.
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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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*
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*******************************************************************************/
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#ifndef _POSIX_
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#include <cruntime.h>
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#include <string.h>
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#include <malloc.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 <mtdll.h>
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#include <awint.h>
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#include <dbgint.h>
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/***
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*wchar_t *_wcslwr(string) - map upper-case characters in a string to lower-case
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*
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*Purpose:
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* wcslwr converts upper-case characters in a null-terminated wchar_t
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* string to their lower-case equivalents. The result may be longer or
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* shorter than the original string. Assumes enough space in string
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* to hold the result.
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*
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*Entry:
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* wchar_t *wsrc - wchar_t string to change to lower case
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*
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*Exit:
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* input string address
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*
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*Exceptions:
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* on an error, the original string is unaltered
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*
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*******************************************************************************/
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wchar_t * __cdecl _wcslwr (
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wchar_t * wsrc
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)
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{
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#ifndef _NTSUBSET_
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wchar_t *p; /* traverses string for C locale conversion */
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wchar_t *wdst = NULL; /* wide version of string in alternate case */
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int dstlen; /* len of wdst string, wide chars, with null */
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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 (__lc_handle[LC_CTYPE] == _CLOCALEHANDLE) {
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for (p=wsrc; *p; p++)
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if ( (*p >= (wchar_t)L'A') && (*p <= (wchar_t)L'Z') )
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*p = *p - L'A' + L'a';
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return (wsrc);
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} /* C locale */
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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_CTYPE] == _CLOCALEHANDLE) {
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_unlock_locale( local_lock_flag )
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for (p=wsrc; *p; p++)
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if ( (*p >= (wchar_t)L'A') && (*p <= (wchar_t)L'Z') )
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*p = *p - L'A' + L'a';
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return (wsrc);
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} /* C locale */
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#endif /* _MT */
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/* Inquire size of wdst string */
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if ((dstlen=__crtLCMapStringW(__lc_handle[LC_CTYPE], LCMAP_LOWERCASE,
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wsrc, -1, wdst, 0, 0)) == 0)
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goto error_cleanup;
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/* Allocate space for wdst */
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if ((wdst = (wchar_t *) _malloc_crt(dstlen*sizeof(wchar_t))) == NULL)
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goto error_cleanup;
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/* Map wrc string to wide-character wdst string in alternate case */
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if (__crtLCMapStringW(__lc_handle[LC_CTYPE], LCMAP_LOWERCASE,
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wsrc, -1, wdst, dstlen, 0) == 0)
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goto error_cleanup;
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/* Copy wdst string to user string */
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wcscpy (wsrc, wdst);
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error_cleanup:
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_unlock_locale( local_lock_flag )
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_free_crt (wdst);
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#else
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wchar_t * p;
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for (p=wsrc; *p; ++p)
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{
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if (L'A' <= *p && *p <= L'Z')
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*p += (wchar_t)L'a' - (wchar_t)L'A';
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}
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#endif
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return (wsrc);
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}
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#endif /* _POSIX_ */
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