src/Utils/UnicodeUtils.cpp

   1 // TortoiseSVN - a Windows shell extension for easy version control
   2
   3 // Copyright (C) 2003-2006, 2008 - TortoiseSVN
   4
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License
   7 // as published by the Free Software Foundation; either version 2
   8 // of the License, or (at your option) any later version.
   9
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software Foundation,
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 //
  19 #include "StdAfx.h"
  20 #include "unicodeutils.h"
  21
  22 CUnicodeUtils::CUnicodeUtils(void)
  23 {
  24 }
  25
  26 CUnicodeUtils::~CUnicodeUtils(void)
  27 {
  28 }
  29
  30 #if defined(_MFC_VER) || defined(CSTRING_AVAILABLE)
  31
  32 struct CodeMap
  33 {
  34         int m_Code;
  35         TCHAR * m_CodeName;
  36 };
  37 int CUnicodeUtils::GetCPCode(CString &codename)
  38 {
  39         static CodeMap map[]=
  40         {
  41                 {037, _T("IBM037")},// IBM EBCDIC US-Canada
  42                 {437, _T("IBM437")},// OEM United States
  43                 {500, _T("IBM500")},// IBM EBCDIC International
  44                 {708, _T("ASMO-708")},// Arabic (ASMO 708)
  45                 {709, _T("Arabic")},// (ASMO-449+, BCON V4)
  46                 {710, _T("Arabic")},// - Transparent Arabic
  47                 {720, _T("DOS-720")},// Arabic (Transparent ASMO); Arabic (DOS)
  48                 {737, _T("ibm737")},// OEM Greek (formerly 437G); Greek (DOS)
  49                 {775, _T("ibm775")},// OEM Baltic; Baltic (DOS)
  50                 {850, _T("ibm850")},// OEM Multilingual Latin 1; Western European (DOS)
  51                 {852, _T("ibm852")},// OEM Latin 2; Central European (DOS)
  52                 {855, _T("IBM855")},// OEM Cyrillic (primarily Russian)
  53                 {857, _T("ibm857")},// OEM Turkish; Turkish (DOS)
  54                 {858, _T("IBM00858")},// OEM Multilingual Latin 1 + Euro symbol
  55                 {860, _T("IBM860")},// OEM Portuguese; Portuguese (DOS)
  56                 {861, _T("ibm861")},// OEM Icelandic; Icelandic (DOS)
  57                 {862, _T("DOS-862")},// OEM Hebrew; Hebrew (DOS)
  58                 {863, _T("IBM863")},// OEM French Canadian; French Canadian (DOS)
  59                 {864, _T("IBM864")},// OEM Arabic; Arabic (864)
  60                 {865, _T("IBM865")},// OEM Nordic; Nordic (DOS)
  61                 {866, _T("cp866")},// OEM Russian; Cyrillic (DOS)
  62                 {869, _T("ibm869")},// OEM Modern Greek; Greek, Modern (DOS)
  63                 {870, _T("IBM870")},// IBM EBCDIC Multilingual/ROECE (Latin 2); IBM EBCDIC Multilingual Latin 2
  64                 {874, _T("windows-874")},// ANSI/OEM Thai (same as 28605, ISO 8859-15); Thai (Windows)
  65                 {875, _T("cp875")},// IBM EBCDIC Greek Modern
  66                 {932, _T("shift_jis")},// ANSI/OEM Japanese; Japanese (Shift-JIS)
  67                 {936, _T("gb2312")},// ANSI/OEM Simplified Chinese (PRC, Singapore); Chinese Simplified (GB2312)
  68                 {949, _T("ks_c_5601-1987")},// ANSI/OEM Korean (Unified Hangul Code)
  69                 {950, _T("big5")},// ANSI/OEM Traditional Chinese (Taiwan; Hong Kong SAR, PRC); Chinese Traditional (Big5)
  70                 {1026,_T("IBM1026")},// IBM EBCDIC Turkish (Latin 5)
  71                 {1047,_T("IBM01047")},// IBM EBCDIC Latin 1/Open System
  72                 {1140,_T("IBM01140")},// IBM EBCDIC US-Canada (037 + Euro symbol); IBM EBCDIC (US-Canada-Euro)
  73                 {1141, _T("IBM01141")},// IBM EBCDIC Germany (20273 + Euro symbol); IBM EBCDIC (Germany-Euro)
  74                 {1142, _T("IBM01142")},// IBM EBCDIC Denmark-Norway (20277 + Euro symbol); IBM EBCDIC (Denmark-Norway-Euro)
  75                 {1143, _T("IBM01143")},// IBM EBCDIC Finland-Sweden (20278 + Euro symbol); IBM EBCDIC (Finland-Sweden-Euro)
  76                 {1144, _T("IBM01144")},// IBM EBCDIC Italy (20280 + Euro symbol); IBM EBCDIC (Italy-Euro)
  77                 {1145, _T("IBM01145")},// IBM EBCDIC Latin America-Spain (20284 + Euro symbol); IBM EBCDIC (Spain-Euro)
  78                 {1146, _T("IBM01146")},// IBM EBCDIC United Kingdom (20285 + Euro symbol); IBM EBCDIC (UK-Euro)
  79                 {1147, _T("IBM01147")},// IBM EBCDIC France (20297 + Euro symbol); IBM EBCDIC (France-Euro)
  80                 {1148, _T("IBM01148")},// IBM EBCDIC International (500 + Euro symbol); IBM EBCDIC (International-Euro)
  81                 {1149, _T("IBM01149")},// IBM EBCDIC Icelandic (20871 + Euro symbol); IBM EBCDIC (Icelandic-Euro)
  82                 {1200, _T("utf-16")},// Unicode UTF-16, little endian byte order (BMP of ISO 10646); available only to managed applications
  83                 {1201, _T("unicodeFFFE")},// Unicode UTF-16, big endian byte order; available only to managed applications
  84                 {1250, _T("windows-1250")},// ANSI Central European; Central European (Windows)
  85                 {1251, _T("windows-1251")},// ANSI Cyrillic; Cyrillic (Windows)
  86                 {1252, _T("windows-1252")},// ANSI Latin 1; Western European (Windows)
  87                 {1253, _T("windows-1253")},// ANSI Greek; Greek (Windows)
  88                 {1254, _T("windows-1254")},// ANSI Turkish; Turkish (Windows)
  89                 {1255, _T("windows-1255")},// ANSI Hebrew; Hebrew (Windows)
  90                 {1256, _T("windows-1256")},// ANSI Arabic; Arabic (Windows)
  91                 {1257, _T("windows-1257")},// ANSI Baltic; Baltic (Windows)
  92                 {1258, _T("windows-1258")},// ANSI/OEM Vietnamese; Vietnamese (Windows)
  93                 {1361, _T("Johab")},// Korean (Johab)
  94                 {10000,_T("macintosh")},// MAC Roman; Western European (Mac)
  95                 {10001, _T("x-mac-japanese")},// Japanese (Mac)
  96                 {10002, _T("x-mac-chinesetrad")},// MAC Traditional Chinese (Big5); Chinese Traditional (Mac)
  97                 {10003, _T("x-mac-korean")},// Korean (Mac)
  98                 {10004, _T("x-mac-arabic")},// Arabic (Mac)
  99                 {10005, _T("x-mac-hebrew")},// Hebrew (Mac)
 100                 {10006, _T("x-mac-greek")},// Greek (Mac)
 101                 {10007, _T("x-mac-cyrillic")},// Cyrillic (Mac)
 102                 {10008, _T("x-mac-chinesesimp")},// MAC Simplified Chinese (GB 2312); Chinese Simplified (Mac)
 103                 {10010, _T("x-mac-romanian")},// Romanian (Mac)
 104                 {10017, _T("x-mac-ukrainian")},// Ukrainian (Mac)
 105                 {10021, _T("x-mac-thai")},// Thai (Mac)
 106                 {10029, _T("x-mac-ce")},// MAC Latin 2; Central European (Mac)
 107                 {10079, _T("x-mac-icelandic")},// Icelandic (Mac)
 108                 {10081, _T("x-mac-turkish")},// Turkish (Mac)
 109                 {10082, _T("x-mac-croatian")},// Croatian (Mac)
 110                 {12000, _T("utf-32")},// Unicode UTF-32, little endian byte order; available only to managed applications
 111                 {12001, _T("utf-32BE")},// Unicode UTF-32, big endian byte order; available only to managed applications
 112                 {20000, _T("x-Chinese_CNS")},// CNS Taiwan; Chinese Traditional (CNS)
 113                 {20001, _T("x-cp20001")},// TCA Taiwan
 114                 {20002, _T("x_Chinese-Eten")},// Eten Taiwan; Chinese Traditional (Eten)
 115                 {20003, _T("x-cp20003")},// IBM5550 Taiwan
 116                 {20004, _T("x-cp20004")},// TeleText Taiwan
 117                 {20005, _T("x-cp20005")},// Wang Taiwan
 118                 {20105, _T("x-IA5")},// IA5 (IRV International Alphabet No. 5, 7-bit); Western European (IA5)
 119                 {20106, _T("x-IA5-German")},// IA5 German (7-bit)
 120                 {20107, _T("x-IA5-Swedish")},// IA5 Swedish (7-bit)
 121                 {20108, _T("x-IA5-Norwegian")},// IA5 Norwegian (7-bit)
 122                 {20127, _T("us-ascii")},// US-ASCII (7-bit)
 123                 {20261, _T("x-cp20261")},// T.61
 124                 {20269, _T("x-cp20269")},// ISO 6937 Non-Spacing Accent
 125                 {20273, _T("IBM273")},// IBM EBCDIC Germany
 126                 {20277, _T("IBM277")},//IBM EBCDIC Denmark-Norway
 127                 {20278, _T("IBM278")},// IBM EBCDIC Finland-Sweden
 128                 {20280, _T("IBM280")},// IBM EBCDIC Italy
 129                 {20284, _T("IBM284")},// IBM EBCDIC Latin America-Spain
 130                 {20285, _T("IBM285")},// IBM EBCDIC United Kingdom
 131                 {20290, _T("IBM290")},// IBM EBCDIC Japanese Katakana Extended
 132                 {20297, _T("IBM297")},// IBM EBCDIC France
 133                 {20420, _T("IBM420")},// IBM EBCDIC Arabic
 134                 {20423, _T("IBM423")},// IBM EBCDIC Greek
 135                 {20424, _T("IBM424")},// IBM EBCDIC Hebrew
 136                 {20833, _T("x-EBCDIC-KoreanExtended")},// IBM EBCDIC Korean Extended
 137                 {20838, _T("IBM-Thai")},// IBM EBCDIC Thai
 138                 {20866, _T("koi8-r")},// Russian (KOI8-R); Cyrillic (KOI8-R)
 139                 {20871, _T("IBM871")},// IBM EBCDIC Icelandic
 140                 {20880, _T("IBM880")},// IBM EBCDIC Cyrillic Russian
 141                 {20905, _T("IBM905")},// IBM EBCDIC Turkish
 142                 {20924, _T("IBM00924")},// IBM EBCDIC Latin 1/Open System (1047 + Euro symbol)
 143                 {20932, _T("EUC-JP")},// Japanese (JIS 0208-1990 and 0121-1990)
 144                 {20936, _T("x-cp20936")},// Simplified Chinese (GB2312); Chinese Simplified (GB2312-80)
 145                 {20949, _T("x-cp20949")},// Korean Wansung
 146                 {21025, _T("cp1025")},// IBM EBCDIC Cyrillic Serbian-Bulgarian
 147                 {21027, _T("21027")},// (deprecated)
 148                 {21866, _T("koi8-u")},// Ukrainian (KOI8-U); Cyrillic (KOI8-U)
 149                 {28591, _T("iso-8859-1")},// ISO 8859-1 Latin 1; Western European (ISO)
 150                 {28592, _T("iso-8859-2")},// ISO 8859-2 Central European; Central European (ISO)
 151                 {28593, _T("iso-8859-3")},// ISO 8859-3 Latin 3
 152                 {28594, _T("iso-8859-4")},// ISO 8859-4 Baltic
 153                 {28595, _T("iso-8859-5")},// ISO 8859-5 Cyrillic
 154                 {28596, _T("iso-8859-6")},// ISO 8859-6 Arabic
 155                 {28597, _T("iso-8859-7")},// ISO 8859-7 Greek
 156                 {28598, _T("iso-8859-8")},// ISO 8859-8 Hebrew; Hebrew (ISO-Visual)
 157                 {28599, _T("iso-8859-9")},// ISO 8859-9 Turkish
 158                 {28603, _T("iso-8859-13")},// ISO 8859-13 Estonian
 159                 {28605, _T("iso-8859-15")},// ISO 8859-15 Latin 9
 160                 {29001, _T("x-Europa")},// Europa 3
 161                 {38598, _T("iso-8859-8-i")},// ISO 8859-8 Hebrew; Hebrew (ISO-Logical)
 162                 {50220, _T("iso-2022-jp")},// ISO 2022 Japanese with no halfwidth Katakana; Japanese (JIS)
 163                 {50221, _T("csISO2022JP")},// ISO 2022 Japanese with halfwidth Katakana; Japanese (JIS-Allow 1 byte Kana)
 164                 {50222, _T("iso-2022-jp")},// ISO 2022 Japanese JIS X 0201-1989; Japanese (JIS-Allow 1 byte Kana - SO/SI)
 165                 {50225, _T("iso-2022-kr")},// ISO 2022 Korean
 166                 {50227, _T("x-cp50227")},// ISO 2022 Simplified Chinese; Chinese Simplified (ISO 2022)
 167                 {50229, _T("ISO")},// 2022 Traditional Chinese
 168                 {50930, _T("EBCDIC")},// Japanese (Katakana) Extended
 169                 {50931, _T("EBCDIC")},// US-Canada and Japanese
 170                 {50933, _T("EBCDIC")},// Korean Extended and Korean
 171                 {50935, _T("EBCDIC")},// Simplified Chinese Extended and Simplified Chinese
 172                 {50936, _T("EBCDIC")},// Simplified Chinese
 173                 {50937, _T("EBCDIC")},// US-Canada and Traditional Chinese
 174                 {50939, _T("EBCDIC")},// Japanese (Latin) Extended and Japanese
 175                 {51932, _T("euc-jp")},// EUC Japanese
 176                 {51936, _T("EUC-CN")},// EUC Simplified Chinese; Chinese Simplified (EUC)
 177                 {51949, _T("euc-kr")},// EUC Korean
 178                 {51950, _T("EUC")},// Traditional Chinese
 179                 {52936, _T("hz-gb-2312")},// HZ-GB2312 Simplified Chinese; Chinese Simplified (HZ)
 180                 {54936, _T("GB18030")},// Windows XP and later: GB18030 Simplified Chinese (4 byte); Chinese Simplified (GB18030)
 181                 {57002, _T("x-iscii-de")},// ISCII Devanagari
 182                 {57003, _T("x-iscii-be")},// ISCII Bengali
 183                 {57004, _T("x-iscii-ta")},// ISCII Tamil
 184                 {57005, _T("x-iscii-te")},// ISCII Telugu
 185                 {57006, _T("x-iscii-as")},// ISCII Assamese
 186                 {57007, _T("x-iscii-or")},// ISCII Oriya
 187                 {57008, _T("x-iscii-ka")},// ISCII Kannada
 188                 {57009, _T("x-iscii-ma")},// ISCII Malayalam
 189                 {57010, _T("x-iscii-gu")},// ISCII Gujarati
 190                 {57011, _T("x-iscii-pa")},// ISCII Punjabi
 191                 {65000, _T("utf-7")},// Unicode (UTF-7)
 192                 {65001, _T("utf-8")},// Unicode (UTF-8)
 193                 {0,NULL}
 194
 195         };
 196         static CodeMap *p=map;
 197         codename=codename.MakeLower();
 198         while(p->m_CodeName != NULL)
 199         {
 200                 CString str = p->m_CodeName;
 201                 str=str.MakeLower();
 202
 203                 if( str == codename)
 204                         return p->m_Code;
 205                 p++;
 206         }
 207
 208         return CP_UTF8;
 209 }
 210 CStringA CUnicodeUtils::GetUTF8(const CStringW& string)
 211 {
 212         char * buf;
 213         CStringA retVal;
 214         int len = string.GetLength();
 215         if (len==0)
 216                 return retVal;
 217         buf = retVal.GetBuffer(len*4 + 1);
 218 //      SecureZeroMemory(buf, (string.GetLength()*4 + 1)*sizeof(char));
 219         int lengthIncTerminator = WideCharToMultiByte(CP_UTF8, 0, string, -1, buf, len*4, NULL, NULL);
 220         retVal.ReleaseBuffer(lengthIncTerminator-1);
 221         return retVal;
 222 }
 223
 224 CStringA CUnicodeUtils::GetUTF8(const CStringA& string)
 225 {
 226         WCHAR * buf;
 227         int len = string.GetLength();
 228         if (len==0)
 229                 return CStringA();
 230         buf = new WCHAR[len*4 + 1];
 231         SecureZeroMemory(buf, (len*4 + 1)*sizeof(WCHAR));
 232         MultiByteToWideChar(CP_ACP, 0, string, -1, buf, len*4);
 233         CStringW temp = CStringW(buf);
 234         delete [] buf;
 235         return (CUnicodeUtils::GetUTF8(temp));
 236 }
 237
 238 CString CUnicodeUtils::GetUnicode(const CStringA& string)
 239 {
 240         WCHAR * buf;
 241         int len = string.GetLength();
 242         if (len==0)
 243                 return CString();
 244         buf = new WCHAR[len*4 + 1];
 245         SecureZeroMemory(buf, (len*4 + 1)*sizeof(WCHAR));
 246         MultiByteToWideChar(CP_UTF8, 0, string, -1, buf, len*4);
 247         CString ret = CString(buf);
 248         delete [] buf;
 249         return ret;
 250 }
 251
 252 CStringA CUnicodeUtils::ConvertWCHARStringToUTF8(const CString& string)
 253 {
 254         CStringA sRet;
 255         char * buf;
 256         buf = new char[string.GetLength()+1];
 257         if (buf)
 258         {
 259                 int i=0;
 260                 for ( ; i<string.GetLength(); ++i)
 261                 {
 262                         buf[i] = (char)string.GetAt(i);
 263                 }
 264                 buf[i] = 0;
 265                 sRet = CStringA(buf);
 266                 delete [] buf;
 267         }
 268         return sRet;
 269 }
 270
 271 #endif //_MFC_VER
 272
 273 #ifdef UNICODE
 274 std::string CUnicodeUtils::StdGetUTF8(const wide_string& wide)
 275 {
 276         int len = (int)wide.size();
 277         if (len==0)
 278                 return std::string();
 279         int size = len*4;
 280         char * narrow = new char[size];
 281         int ret = WideCharToMultiByte(CP_UTF8, 0, wide.c_str(), len, narrow, size-1, NULL, NULL);
 282         narrow[ret] = 0;
 283         std::string sRet = std::string(narrow);
 284         delete [] narrow;
 285         return sRet;
 286 }
 287
 288 wide_string CUnicodeUtils::StdGetUnicode(const std::string& multibyte)
 289 {
 290         int len = (int)multibyte.size();
 291         if (len==0)
 292                 return wide_string();
 293         int size = len*4;
 294         wchar_t * wide = new wchar_t[size];
 295         int ret = MultiByteToWideChar(CP_UTF8, 0, multibyte.c_str(), len, wide, size - 1);
 296         wide[ret] = 0;
 297         wide_string sRet = wide_string(wide);
 298         delete [] wide;
 299         return sRet;
 300 }
 301 #endif
 302
 303 std::string WideToMultibyte(const wide_string& wide)
 304 {
 305         char * narrow = new char[wide.length()*3+2];
 306         BOOL defaultCharUsed;
 307         int ret = (int)WideCharToMultiByte(CP_ACP, 0, wide.c_str(), (int)wide.size(), narrow, (int)wide.length()*3 - 1, ".", &defaultCharUsed);
 308         narrow[ret] = 0;
 309         std::string str = narrow;
 310         delete[] narrow;
 311         return str;
 312 }
 313
 314 std::string WideToUTF8(const wide_string& wide)
 315 {
 316         char * narrow = new char[wide.length()*3+2];
 317         int ret = (int)WideCharToMultiByte(CP_UTF8, 0, wide.c_str(), (int)wide.size(), narrow, (int)wide.length()*3 - 1, NULL, NULL);
 318         narrow[ret] = 0;
 319         std::string str = narrow;
 320         delete[] narrow;
 321         return str;
 322 }
 323
 324 wide_string MultibyteToWide(const std::string& multibyte)
 325 {
 326         size_t length = multibyte.length();
 327         if (length == 0)
 328                 return wide_string();
 329
 330         wchar_t * wide = new wchar_t[multibyte.length()*2+2];
 331         if (wide == NULL)
 332                 return wide_string();
 333         int ret = (int)MultiByteToWideChar(CP_ACP, 0, multibyte.c_str(), (int)multibyte.size(), wide, (int)length*2 - 1);
 334         wide[ret] = 0;
 335         wide_string str = wide;
 336         delete[] wide;
 337         return str;
 338 }
 339
 340 wide_string UTF8ToWide(const std::string& multibyte)
 341 {
 342         size_t length = multibyte.length();
 343         if (length == 0)
 344                 return wide_string();
 345
 346         wchar_t * wide = new wchar_t[length*2+2];
 347         if (wide == NULL)
 348                 return wide_string();
 349         int ret = (int)MultiByteToWideChar(CP_UTF8, 0, multibyte.c_str(), (int)multibyte.size(), wide, (int)length*2 - 1);
 350         wide[ret] = 0;
 351         wide_string str = wide;
 352         delete[] wide;
 353         return str;
 354 }
 355 #ifdef UNICODE
 356 stdstring UTF8ToString(const std::string& string) {return UTF8ToWide(string);}
 357 std::string StringToUTF8(const stdstring& string) {return WideToUTF8(string);}
 358 #else
 359 stdstring UTF8ToString(const std::string& string) {return WideToMultibyte(UTF8ToWide(string));}
 360 std::string StringToUTF8(const stdstring& string) {return WideToUTF8(MultibyteToWide(string));}
 361 #endif
 362
 363
 364 #pragma warning(push)
 365 #pragma warning(disable: 4200)
 366 struct STRINGRESOURCEIMAGE
 367 {
 368         WORD nLength;
 369         WCHAR achString[];
 370 };
 371 #pragma warning(pop)    // C4200
 372
 373 int LoadStringEx(HINSTANCE hInstance, UINT uID, LPTSTR lpBuffer, int nBufferMax, WORD wLanguage)
 374 {
 375         const STRINGRESOURCEIMAGE* pImage;
 376         const STRINGRESOURCEIMAGE* pImageEnd;
 377         ULONG nResourceSize;
 378         HGLOBAL hGlobal;
 379         UINT iIndex;
 380 #ifndef UNICODE
 381         BOOL defaultCharUsed;
 382 #endif
 383         int ret;
 384
 385         if (lpBuffer == NULL)
 386                 return 0;
 387         lpBuffer[0] = 0;
 388         HRSRC hResource =  FindResourceEx(hInstance, RT_STRING, MAKEINTRESOURCE(((uID>>4)+1)), wLanguage);
 389         if (!hResource)
 390         {
 391                 //try the default language before giving up!
 392                 hResource = FindResource(hInstance, MAKEINTRESOURCE(((uID>>4)+1)), RT_STRING);
 393                 if (!hResource)
 394                         return 0;
 395         }
 396         hGlobal = LoadResource(hInstance, hResource);
 397         if (!hGlobal)
 398                 return 0;
 399         pImage = (const STRINGRESOURCEIMAGE*)::LockResource(hGlobal);
 400         if(!pImage)
 401                 return 0;
 402
 403         nResourceSize = ::SizeofResource(hInstance, hResource);
 404         pImageEnd = (const STRINGRESOURCEIMAGE*)(LPBYTE(pImage)+nResourceSize);
 405         iIndex = uID&0x000f;
 406
 407         while ((iIndex > 0) && (pImage < pImageEnd))
 408         {
 409                 pImage = (const STRINGRESOURCEIMAGE*)(LPBYTE(pImage)+(sizeof(STRINGRESOURCEIMAGE)+(pImage->nLength*sizeof(WCHAR))));
 410                 iIndex--;
 411         }
 412         if (pImage >= pImageEnd)
 413                 return 0;
 414         if (pImage->nLength == 0)
 415                 return 0;
 416 #ifdef UNICODE
 417         ret = pImage->nLength;
 418         if (ret > nBufferMax)
 419                 ret = nBufferMax;
 420         wcsncpy_s((wchar_t *)lpBuffer, nBufferMax, pImage->achString, ret);
 421         lpBuffer[ret] = 0;
 422 #else
 423         ret = WideCharToMultiByte(CP_ACP, 0, pImage->achString, pImage->nLength, (LPSTR)lpBuffer, nBufferMax-1, ".", &defaultCharUsed);
 424         lpBuffer[ret] = 0;
 425 #endif
 426         return ret;
 427 }
 428