windows-server-2003/base/crts/crtw32/string/wcsupr.c

/***
*wcsupr.c - routine to map lower-case characters in a wchar_t string
*       to upper-case
*
*       Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       Converts all the lower case characters in a wchar_t string
*       to upper case, in place.
*
*Revision History:
*       09-09-91  ETC   Created from strupr.c and wcslwr.c
*       04-06-92  KRS   Make work without _INTL also.
*       08-19-92  KRS   Activate NLS support.
*       08-22-92  SRW   Allow INTL definition to be conditional for building ntcrt.lib
*       09-02-92  SRW   Get _INTL definition via ..\crt32.def
*       02-16-93  CFW   Optimize test for lowercase in "C" locale.
*       04-06-93  SKS   Replace _CRTAPI* with __cdecl
*       06-02-93  SRW   ignore _INTL if _NTSUBSET_ defined.
*       09-15-93  CFW   Use ANSI conformant "__" names.
*       09-16-93  GJF   Merged NT SDK and Cuda versions.
*       09-22-93  CFW   Use __crtxxx internal NLS API wrapper.
*       11-09-93  CFW   Add code page for __crtxxx().
*       02-07-94  CFW   POSIXify.
*       09-06-94  CFW   Remove _INTL switch.
*       10-25-94  GJF   Sped up C locale, multi-thread case.
*       01-10-95  CFW   Debug CRT allocs.
*       09-26-95  GJF   New locking macro, and scheme, for functions which
*                       reference the locale.
*       08-17-98  GJF   Revised multithread support based on threadlocinfo
*                       struct. Also, use _alloca instead of _malloc_crt if
*                       possible.
*       10-19-98  GJF   Major typo, = should have been ==
*       12-10-99  GB    Added support for recovery from stack overflow around 
*                       _alloca().
*       08-08-02  BWT   Don't use alloca - just use local buf for short strings,
*                       and heap for long ones.
*
*******************************************************************************/

#ifndef _POSIX_

#include <cruntime.h>
#include <string.h>
#include <malloc.h>
#include <locale.h>
#include <ctype.h>
#include <setlocal.h>
#include <mtdll.h>
#include <awint.h>
#include <dbgint.h>

/***
*wchar_t *_wcsupr(string) - map lower-case characters in a string to upper-case
*
*Purpose:
*       wcsupr converts lower-case characters in a null-terminated wchar_t 
*       string to their upper-case equivalents.  The result may be longer or
*       shorter than the original string.  Assumes enough space in string
*       to hold the result.
*
*Entry:
*       wchar_t *wsrc - wchar_t string to change to upper case
*
*Exit:
*       input string address
*
*Exceptions:
*       on an error, the original string is unaltered
*
*******************************************************************************/

wchar_t * __cdecl _wcsupr (
        wchar_t * wsrc
        )
{
#ifndef _NTSUBSET_

        wchar_t *p;             /* traverses string for C locale conversion */
        wchar_t *wdst;          /* wide version of string in alternate case */
        wchar_t wslocal[128];   /* Local buffer to use for conversion of short strings */
        int dstlen;             /* len of wdst string, wide chars, with null */
        int malloc_flag = 0;
#ifdef  _MT
        pthreadlocinfo ptloci = _getptd()->ptlocinfo;

        if ( ptloci != __ptlocinfo )
            ptloci = __updatetlocinfo();

        if ( ptloci->lc_handle[LC_CTYPE] == _CLOCALEHANDLE ) {
#else
        if ( __lc_handle[LC_CTYPE] == _CLOCALEHANDLE ) {
#endif
            for ( p = wsrc ; *p ; p++ )
            {
                if ( (*p >= (wchar_t)L'a') && (*p <= (wchar_t)L'z') )
                    *p = *p - (L'a' - L'A');
            }
            return(wsrc);
        }   /* C locale */


        /* Inquire size of wdst string */
#ifdef  _MT
        if ( (dstlen = __crtLCMapStringW( ptloci->lc_handle[LC_CTYPE],
#else
        if ( (dstlen = __crtLCMapStringW( __lc_handle[LC_CTYPE],
#endif
                                          LCMAP_UPPERCASE,
                                          wsrc,
                                          -1,
                                          NULL,
                                          0,
#ifdef  _MT
                                          ptloci->lc_codepage )) == 0 )
#else
                                          __lc_codepage )) == 0 )
#endif
            return(wsrc);

        if (dstlen*sizeof(wchar_t) < sizeof(wslocal)) {
            wdst = wslocal;
        } else {
            wdst = (wchar_t *)_malloc_crt(dstlen * sizeof(wchar_t));
            malloc_flag++;
        }

        /* Map wrc string to wide-character wdst string in alternate case */
        if ( (wdst != NULL) &&
#ifdef  _MT
             (__crtLCMapStringW( ptloci->lc_handle[LC_CTYPE],
#else
             (__crtLCMapStringW( __lc_handle[LC_CTYPE],
#endif
                                 LCMAP_UPPERCASE,
                                 wsrc,
                                 -1,
                                 wdst,
                                 dstlen,
#ifdef  _MT
                                 ptloci->lc_codepage ) != 0) )
#else
                                 __lc_codepage ) != 0) )
#endif
            /* Copy wdst string to user string */
            wcscpy (wsrc, wdst);

        if ( malloc_flag )
            _free_crt(wdst);

#else   /* NTSUBSET */

        wchar_t * p;

        for (p=wsrc; *p; ++p)
        {
                if (L'a' <= *p && *p <= L'z')
                        *p += (wchar_t)(L'A' - L'a');
        }
#endif
        return(wsrc);
}

#endif /* _POSIX_ */