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/***
*w_map.c - W version of LCMapString.** Copyright (c) 1993-2001, Microsoft Corporation. All rights reserved.**Purpose:* Use either LCMapStringA or LCMapStringW depending on which is available**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 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.* 07-26-94 CFW Bug fix #14730, LCMapString goes past NULLs.* 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 mapping, try W version first so Windows NT* can process nonANSI codepage correctly.* 03-16-97 RDK Added error flag to __crtLCMapStringA.* 05-09-97 GJF Split off from aw_map.c. Revised to use _alloca* instead of malloc. Also, reformatted.* 05-27-98 GJF Changed wcsncnt() so that it will never examine the* (cnt + 1)-th byte of the string.* 08-18-98 GJF Use _malloc_crt if _alloca fails.* 04-28-99 GJF Changed dwFlags arg value to 0 in WideCharToMultiByte* calls to avoid problems with codepage 1258 on NT 5.0.* 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>
#define USE_W 1
#define USE_A 2
/***
*int __cdecl wcsncnt - count wide characters in a string, up to n.**Purpose:* Internal local support function. Counts characters in string before* null. If null not found in n chars, then return n.**Entry:* const wchar_t *string - start of string* int n - byte count**Exit:* returns number of wide characaters from start of string to* null (exclusive), up to n.**Exceptions:********************************************************************************/
static int __cdecl wcsncnt ( const wchar_t *string, int cnt ){ int n = cnt; wchar_t *cp = (wchar_t *)string;
while (n-- && *cp) cp++;
return cnt - n - 1;}
/***
*int __cdecl __crtLCMapStringW - Get type information about a wide string.**Purpose:* Internal support function. Assumes info in wide string format. Tries* to use NLS API call LCMapStringW if available and uses LCMapStringA* if it must. If neither are available it fails and returns 0.**Entry:* LCID Locale - locale context for the comparison.* DWORD dwMapFlags - see NT\Chicago docs* LPCWSTR lpSrcStr - pointer to string to be mapped* int cchSrc - wide char (word) count of input string * (including NULL if any)* (-1 if NULL terminated) * LPWSTR lpDestStr - pointer to memory to store mapping* int cchDest - wide char (word) count of buffer (including NULL)* int code_page - for MB/WC conversion. If 0, use __lc_codepage** NOTE: if LCMAP_SORTKEY is specified, then cchDest refers to number * of BYTES, not number of wide chars. The return string will be* a series of bytes with a NULL byte terminator.**Exit:* Success: if LCMAP_SORKEY:* number of bytes written to lpDestStr (including NULL byte * terminator)* else* number of wide characters written to lpDestStr (including * NULL)* Failure: 0**Exceptions:********************************************************************************/
int __cdecl __crtLCMapStringW( LCID Locale, DWORD dwMapFlags, LPCWSTR lpSrcStr, int cchSrc, LPWSTR lpDestStr, int cchDest, int code_page ){ 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. */ if (0 == f_use) { if (0 != LCMapStringW(0, LCMAP_LOWERCASE, L"\0", 1, NULL, 0)) f_use = USE_W; else if (GetLastError() == ERROR_CALL_NOT_IMPLEMENTED) f_use = USE_A; }
/*
* LCMapString will map past NULL. Must find NULL if in string * before cchSrc wide characters. */ if (cchSrc > 0) cchSrc = wcsncnt(lpSrcStr, cchSrc);
/* Use "W" version */
if (USE_W == f_use) { return LCMapStringW( Locale, dwMapFlags, lpSrcStr, cchSrc, lpDestStr, cchDest ); }
/* Use "A" version */
if (USE_A == f_use || f_use == 0) {
int retval = 0; int inbuff_size; int outbuff_size; unsigned char *inbuffer; unsigned char *outbuffer; int malloc_flag1 = 0; int malloc_flag2 = 0; int AnsiCP = 0;
/*
* Convert string and return the requested information. Note that * we are converting to a multibyte string so there is not a * one-to-one correspondence between number of wide chars in the * input string and the number of *bytes* in the buffer. However, * there had *better be* a one-to-one correspondence between the * number of wide characters and the number of multibyte characters * (enforced by WC_SEPCHARS) in the buffer or the resulting mapped * string will be worthless to the user. * */
/*
* Use __lc_codepage for conversion if code_page not specified */
if (0 == Locale) Locale = __lc_handle[LC_CTYPE]; if (0 == code_page) code_page = __lc_codepage;
/*
* Always use Ansi codepage with Ansi WinAPI because they use * Ansi codepage */ if ( code_page != (AnsiCP = __ansicp(Locale))) { if (AnsiCP != -1) code_page = AnsiCP; }
/* find out how big a buffer we need (includes NULL if any) */ if ( 0 == (inbuff_size = WideCharToMultiByte( code_page, 0, lpSrcStr, cchSrc, NULL, 0, NULL, NULL )) ) return 0;
/* allocate enough space for chars */ __try { inbuffer = (unsigned char *)_alloca( inbuff_size * sizeof(char) ); } __except(EXCEPTION_EXECUTE_HANDLER) { _resetstkoflw(); inbuffer = NULL; }
if ( inbuffer == NULL ) { if ( (inbuffer = (unsigned char *)_malloc_crt(inbuff_size * sizeof(char))) == NULL ) return 0; malloc_flag1++; }
/* do the conversion */ if ( 0 == WideCharToMultiByte( code_page, 0, lpSrcStr, cchSrc, inbuffer, inbuff_size, NULL, NULL ) ) goto error_cleanup;
/* get size required for string mapping */ if ( 0 == (outbuff_size = LCMapStringA( Locale, dwMapFlags, inbuffer, inbuff_size, NULL, 0 )) ) goto error_cleanup;
/* allocate enough space for chars and NULL */ __try { outbuffer = (unsigned char *)_alloca( outbuff_size * sizeof(char) ); } __except(EXCEPTION_EXECUTE_HANDLER) { _resetstkoflw(); outbuffer = NULL; }
if ( outbuffer == NULL ) { if ( (outbuffer = (unsigned char *)_malloc_crt(outbuff_size * sizeof(char))) == NULL ) goto error_cleanup; malloc_flag2++; }
/* do string mapping */ if ( 0 == LCMapStringA( Locale, dwMapFlags, inbuffer, inbuff_size, outbuffer, outbuff_size ) ) goto error_cleanup;
if (dwMapFlags & LCMAP_SORTKEY) {
/* outbuff_size > cchDest is allowed */ retval = outbuff_size;
if (0 != cchDest) /* SORTKEY returns BYTES, just copy */ strncpy( (char *)lpDestStr, (char *)outbuffer, cchDest < outbuff_size ? cchDest : outbuff_size ); } else { if (0 == cchDest) { /* get size required */ if ( 0 == (retval = MultiByteToWideChar( code_page, MB_PRECOMPOSED, outbuffer, outbuff_size, NULL, 0 )) ) goto error_cleanup; } else { /* convert mapping */ if ( 0 == (retval = MultiByteToWideChar( code_page, MB_PRECOMPOSED, outbuffer, outbuff_size, lpDestStr, cchDest )) ) goto error_cleanup; } }
error_cleanup: if ( malloc_flag2 ) _free_crt(outbuffer);
if ( malloc_flag1 ) _free_crt(inbuffer);
return retval; } else /* f_use is neither USE_A nor USE_W */ return 0;}
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