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/***
*a_str.c - A version of GetStringType.** Copyright (c) 1993-2001, Microsoft Corporation. All rights reserved.**Purpose:* Use either GetStringTypeA or GetStringTypeW depending on which is* unstubbed.**Revision History:* 09-14-93 CFW Module created.* 09-17-93 CFW Use unsigned chars.* 09-23-93 CFW Correct NLS API params and comments about same.* 10-07-93 CFW Optimize WideCharToMultiByte, use NULL default char.* 10-22-93 CFW Remove bad verification test from "A" version.* 10-22-93 CFW Test for invalid MB chars using global preset flag.* 11-09-93 CFW Allow user to pass in code page.* 11-18-93 CFW Test for entry point function stubs.* 02-23-94 CFW Use W flavor whenever possible.* 03-31-94 CFW Include awint.h.* 04-18-94 CFW Use lcid value if passed in.* 04-18-94 CFW Use calloc and don't test the NULL.* 10-24-94 CFW Must verify GetStringType return.* 12-21-94 CFW Remove invalid MB chars NT 3.1 hack.* 12-27-94 CFW Call direct, all OS's have stubs.* 01-10-95 CFW Debug CRT allocs.* 02-15-97 RDK For narrow string type, try W version first so* Windows NT can process nonANSI codepage correctly.* 03-16-97 RDK Added error flag to __crtGetStringTypeA.* 05-12-97 GJF Renamed and moved __crtGetStringTypeW into a separate * file. Revised to use _alloca instead of malloc. Also,* removed some silly code and reformatted.* 08-18-98 GJF Use _malloc_crt if _alloca fails.* 12-10-99 GB Added support for recovery from stack overflow around * _alloca().* 05-17-00 GB Use ERROR_CALL_NOT_IMPLEMENTED for existance of W API* 08-23-00 GB Fixed bug with non Ansi CP on Win9x.********************************************************************************/
#include <cruntime.h>
#include <internal.h>
#include <stdlib.h>
#include <setlocal.h>
#include <locale.h>
#include <awint.h>
#include <dbgint.h>
#include <malloc.h>
#include <awint.h>
#define USE_W 1
#define USE_A 2
/***
*int __cdecl __crtGetStringTypeA - Get type information about an ANSI string.**Purpose:* Internal support function. Assumes info in ANSI string format. Tries* to use NLS API call GetStringTypeA if available and uses GetStringTypeW* if it must. If neither are available it fails and returns FALSE.**Entry:* DWORD dwInfoType - see NT\Chicago docs* LPCSTR lpSrcStr - char (byte) string for which character types * are requested* int cchSrc - char (byte) count of lpSrcStr (including NULL * if any)* LPWORD lpCharType - word array to receive character type information* (must be twice the size of lpSrcStr)* int code_page - for MB/WC conversion. If 0, use __lc_codepage* int lcid - for A call, specify LCID, If 0, use * __lc_handle[LC_CTYPE].* BOOL bError - TRUE if MB_ERR_INVALID_CHARS set on call to* MultiByteToWideChar when GetStringTypeW used.**Exit:* Success: TRUE* Failure: FALSE**Exceptions:********************************************************************************/
BOOL __cdecl __crtGetStringTypeA( DWORD dwInfoType, LPCSTR lpSrcStr, int cchSrc, LPWORD lpCharType, int code_page, int lcid, BOOL bError ){ static int f_use = 0;
/*
* Look for unstubbed 'preferred' flavor. Otherwise use available * flavor. Must actually call the function to ensure it's not a stub. * (Always try wide version first so WinNT can process codepage correctly.) */
if (0 == f_use) { unsigned short dummy;
if (0 != GetStringTypeW(CT_CTYPE1, L"\0", 1, &dummy)) f_use = USE_W;
else if (GetLastError() == ERROR_CALL_NOT_IMPLEMENTED) f_use = USE_A; }
/* Use "A" version */
if (USE_A == f_use || f_use == 0) { char *cbuffer = NULL; int ret; int AnsiCP;
if (0 == lcid) lcid = __lc_handle[LC_CTYPE]; if (0 == code_page) code_page = __lc_codepage;
if ( -1 == (AnsiCP = __ansicp(lcid))) return FALSE; /* If current code-page is not ansi code page, convert it to ansi code page
* as GetStringTypeA uses ansi code page to find the strig type. */ if ( AnsiCP != code_page) { cbuffer = __convertcp(code_page, AnsiCP, lpSrcStr, &cchSrc, NULL, 0); if (cbuffer == NULL) return FALSE; lpSrcStr = cbuffer; }
ret = GetStringTypeA(lcid, dwInfoType, lpSrcStr, cchSrc, lpCharType); if ( cbuffer != NULL) _free_crt(cbuffer); return ret; }
/* Use "W" version */
if (USE_W == f_use) { int retval1; int buff_size; wchar_t *wbuffer; BOOL retval2 = FALSE; int malloc_flag = 0;
/*
* Convert string and return the requested information. Note that * we are converting to a wide character string so there is not a * one-to-one correspondence between number of multibyte chars in the * input string and the number of wide chars in the buffer. However, * there had *better be* a one-to-one correspondence between the * number of multibyte characters and the number of WORDs in the * return buffer. */
/*
* Use __lc_codepage for conversion if code_page not specified */
if (0 == code_page) code_page = __lc_codepage;
/* find out how big a buffer we need */ if ( 0 == (buff_size = MultiByteToWideChar( code_page, bError ? MB_PRECOMPOSED | MB_ERR_INVALID_CHARS : MB_PRECOMPOSED, lpSrcStr, cchSrc, NULL, 0 )) ) return FALSE;
/* allocate enough space for wide chars */ __try { wbuffer = (wchar_t *)_alloca( sizeof(wchar_t) * buff_size ); (void)memset( wbuffer, 0, sizeof(wchar_t) * buff_size ); } __except( EXCEPTION_EXECUTE_HANDLER ) { _resetstkoflw(); wbuffer = NULL; }
if ( wbuffer == NULL ) { if ( (wbuffer = (wchar_t *)_calloc_crt(sizeof(wchar_t), buff_size)) == NULL ) return FALSE; malloc_flag++; }
/* do the conversion */ if ( 0 != (retval1 = MultiByteToWideChar( code_page, MB_PRECOMPOSED, lpSrcStr, cchSrc, wbuffer, buff_size )) ) /* obtain result */ retval2 = GetStringTypeW( dwInfoType, wbuffer, retval1, lpCharType );
if ( malloc_flag ) _free_crt(wbuffer);
return retval2; } else /* f_use is neither USE_A nor USE_W */ return FALSE;}
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