120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
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/***
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*aw_com.c - W version of GetCommandLine.
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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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* Use GetCommandLineW if available, otherwise use A version.
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*
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*Revision History:
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* 03-29-94 CFW Module created.
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* 12-27-94 CFW Call direct, all OS's have stubs.
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* 01-10-95 CFW Debug CRT allocs.
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* 08-21-98 GJF Use CP_ACP instead of __lc_codepage.
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* 05-17-00 GB Use ERROR_CALL_NOT_IMPLEMENTED for existance of W API
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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 <setlocal.h>
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#include <awint.h>
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#include <dbgint.h>
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#define USE_W 1
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#define USE_A 2
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/***
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*LPWSTR __cdecl __crtGetCommandLineW - Get wide command line.
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*
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*Purpose:
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* Internal support function. Tries to use NLS API call
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* GetCommandLineW if available and uses GetCommandLineA
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* if it must. If neither are available it fails and returns 0.
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*
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*Entry:
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* VOID
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*
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*Exit:
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* LPWSTR - pointer to environment block
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*
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*Exceptions:
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*
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*******************************************************************************/
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LPWSTR __cdecl __crtGetCommandLineW(
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VOID
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)
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{
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static int f_use = 0;
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/*
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* Look for unstubbed 'preferred' flavor. Otherwise use available flavor.
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* Must actually call the function to ensure it's not a stub.
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*/
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if (0 == f_use)
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{
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if (NULL != GetCommandLineW())
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f_use = USE_W;
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else if (GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
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f_use = USE_A;
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else
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return 0;
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}
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/* Use "W" version */
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if (USE_W == f_use)
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{
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return GetCommandLineW();
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}
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/* Use "A" version */
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if (USE_A == f_use || f_use == 0)
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{
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int buff_size;
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wchar_t *wbuffer;
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LPSTR lpenv;
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/*
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* Convert strings and return the requested information.
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*/
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lpenv = GetCommandLineA();
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/* find out how big a buffer we need */
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if ( 0 == (buff_size = MultiByteToWideChar( CP_ACP,
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MB_PRECOMPOSED,
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lpenv,
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-1,
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NULL,
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0 )) )
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return 0;
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/* allocate enough space for chars */
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if (NULL == (wbuffer = (wchar_t *)
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_malloc_crt(buff_size * sizeof(wchar_t))))
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return 0;
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if ( 0 != MultiByteToWideChar( CP_ACP,
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MB_PRECOMPOSED,
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lpenv,
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-1,
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wbuffer,
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buff_size ) )
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{
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return (LPWSTR)wbuffer;
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} else {
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_free_crt(wbuffer);
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return 0;
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}
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}
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else /* f_use is neither USE_A nor USE_W */
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return 0;
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}
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