142 lines
4.6 KiB
C
142 lines
4.6 KiB
C
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/***
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*a_str.c - A version of GetStringType.
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Use either GetStringTypeA or GetStringTypeW depending on which is
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* unstubbed.
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <internal.h>
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#include <stdlib.h>
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#include <locale.h>
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#include <awint.h>
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#include <dbgint.h>
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#include <malloc.h>
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#include <awint.h>
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#include <mtdll.h>
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#include <setlocal.h>
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/***
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*int __cdecl __crtGetStringTypeA - Get type information about an ANSI string.
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*
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*Purpose:
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* Internal support function. Assumes info in ANSI string format. Tries
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* to use NLS API call GetStringTypeA if available and uses GetStringTypeW
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* if it must. If neither are available it fails and returns FALSE.
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*
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*Entry:
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* DWORD dwInfoType - see NT\Chicago docs
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* LPCSTR lpSrcStr - char (byte) string for which character types
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* are requested
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* int cchSrc - char (byte) count of lpSrcStr (including NULL
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* if any)
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* LPWORD lpCharType - word array to receive character type information
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* (must be twice the size of lpSrcStr)
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* int code_page - for MB/WC conversion. If 0, use __lc_codepage
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* BOOL bError - TRUE if MB_ERR_INVALID_CHARS set on call to
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* MultiByteToWideChar when GetStringTypeW used.
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*
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*Exit:
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* Success: TRUE
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* Failure: FALSE
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*
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*Exceptions:
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*
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*******************************************************************************/
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static BOOL __cdecl __crtGetStringTypeA_stat(
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_locale_t plocinfo,
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DWORD dwInfoType,
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LPCSTR lpSrcStr,
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int cchSrc,
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LPWORD lpCharType,
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int code_page,
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BOOL bError
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)
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{
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int retval1;
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int buff_size;
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wchar_t *wbuffer;
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BOOL retval2 = FALSE;
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/*
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* Convert string and return the requested information. Note that
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* we are converting to a wide character string so there is not a
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* one-to-one correspondence between number of multibyte chars in the
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* input string and the number of wide chars in the buffer. However,
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* there had *better be* a one-to-one correspondence between the
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* number of multibyte characters and the number of WORDs in the
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* return buffer.
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*/
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/*
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* Use __lc_codepage for conversion if code_page not specified
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*/
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if (0 == code_page)
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code_page = plocinfo->locinfo->lc_codepage;
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/* find out how big a buffer we need */
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if ( 0 == (buff_size = MultiByteToWideChar( code_page,
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bError ?
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MB_PRECOMPOSED |
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MB_ERR_INVALID_CHARS
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: MB_PRECOMPOSED,
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lpSrcStr,
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cchSrc,
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NULL,
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0 )) )
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return FALSE;
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/* allocate enough space for wide chars */
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wbuffer = (wchar_t *)_calloca( sizeof(wchar_t), buff_size );
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if ( wbuffer == NULL ) {
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return FALSE;
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}
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(void)memset( wbuffer, 0, sizeof(wchar_t) * buff_size );
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/* do the conversion */
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if ( 0 != (retval1 = MultiByteToWideChar( code_page,
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MB_PRECOMPOSED,
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lpSrcStr,
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cchSrc,
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wbuffer,
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buff_size )) )
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/* obtain result */
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retval2 = GetStringTypeW( dwInfoType,
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wbuffer,
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retval1,
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lpCharType );
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_freea(wbuffer);
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return retval2;
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}
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extern "C" BOOL __cdecl __crtGetStringTypeA(
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_locale_t plocinfo,
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DWORD dwInfoType,
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LPCSTR lpSrcStr,
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int cchSrc,
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LPWORD lpCharType,
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int code_page,
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BOOL bError
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)
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{
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_LocaleUpdate _loc_update(plocinfo);
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return __crtGetStringTypeA_stat(
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_loc_update.GetLocaleT(),
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dwInfoType,
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lpSrcStr,
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cchSrc,
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lpCharType,
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code_page,
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bError
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);
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}
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