Dogcows Code - chaz/yoink/blob - src/stringtools.cc

   1
   2 /*******************************************************************************
   3
   4  Copyright (c) 2009, Charles McGarvey
   5  All rights reserved.
   6
   7  Redistribution   and   use  in  source  and  binary  forms,  with  or  without
   8  modification, are permitted provided that the following conditions are met:
   9
  10    * Redistributions  of  source  code  must retain the above copyright notice,
  11      this list of conditions and the following disclaimer.
  12    * Redistributions  in binary form must reproduce the above copyright notice,
  13      this  list of conditions and the following disclaimer in the documentation
  14      and/or other materials provided with the distribution.
  15
  16  THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  20  FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23  CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24  OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27 *******************************************************************************/
  28
  29 #include <stdexcept>
  30
  31 #include "ConvertUTF.h"
  32
  33 #include "stringtools.hh"
  34
  35
  36 namespace dc {
  37
  38
  39 std::wstring multiToWide(const std::string& multiStr)
  40 {
  41         size_t length = multiStr.length();
  42
  43         if (sizeof(wchar_t) == 2)
  44         {
  45                 wchar_t* wideStr = new wchar_t[length + 1];
  46
  47                 const UTF8* srcStart = reinterpret_cast<const UTF8*>(multiStr.c_str());
  48                 const UTF8* srcEnd = srcStart + length;
  49                 UTF16* targetStart = reinterpret_cast<UTF16*>(wideStr);
  50                 UTF16* targetEnd = targetStart + length+1;
  51
  52                 ConversionResult res = ConvertUTF8toUTF16(&srcStart, srcEnd,
  53                                 &targetStart, targetEnd, lenientConversion);
  54                 if (res != conversionOK)
  55                 {
  56                         delete[] wideStr;
  57                         throw std::runtime_error("bad conversion from multi to wide characters");
  58                 }
  59
  60                 *targetStart = 0;
  61                 std::wstring convertedStr(wideStr);
  62                 delete[] wideStr;
  63                 return convertedStr;
  64         }
  65         else if (sizeof(wchar_t) == 4)
  66         {
  67                 wchar_t* wideStr = new wchar_t[length];
  68
  69                 const UTF8* srcStart = reinterpret_cast<const UTF8*>(multiStr.c_str());
  70                 const UTF8* srcEnd = srcStart + length;
  71                 UTF32* targetStart = reinterpret_cast<UTF32*>(wideStr);
  72                 UTF32* targetEnd = targetStart + length;
  73
  74                 ConversionResult res = ConvertUTF8toUTF32(&srcStart, srcEnd,
  75                                 &targetStart, targetEnd, lenientConversion);
  76                 if (res != conversionOK)
  77                 {
  78                         delete[] wideStr;
  79                         throw std::runtime_error("bad conversion from multi to wide characters");
  80                 }
  81
  82                 *targetStart = 0;
  83                 std::wstring convertedStr(wideStr);
  84                 delete[] wideStr;
  85                 return convertedStr;
  86         }
  87         else
  88         {
  89                 throw std::runtime_error("unknown size of wide characters");
  90         }
  91         return L"";
  92 }
  93
  94 std::string wideToMulti(const std::wstring& wideStr)
  95 {
  96         size_t length = wideStr.length();
  97
  98         if (sizeof(wchar_t) == 2)
  99         {
 100                 size_t multiLength = 3 * length + 1;
 101                 char* multiStr = new char[multiLength];
 102
 103                 const UTF16* srcStart = reinterpret_cast<const UTF16*>(wideStr.c_str());
 104                 const UTF16* srcEnd = srcStart + length;
 105                 UTF8* targetStart = reinterpret_cast<UTF8*>(multiStr);
 106                 UTF8* targetEnd = targetStart + multiLength;
 107
 108                 ConversionResult res = ConvertUTF16toUTF8(&srcStart, srcEnd,
 109                                 &targetStart, targetEnd, lenientConversion);
 110                 if (res != conversionOK)
 111                 {
 112                         delete[] multiStr;
 113                         throw std::runtime_error("bad conversion from wide to multi-characters");
 114                 }
 115
 116                 *targetStart = 0;
 117                 std::string convertedStr(multiStr);
 118                 delete[] multiStr;
 119                 return convertedStr;
 120         }
 121         else if (sizeof(wchar_t) == 4)
 122         {
 123                 size_t multiLength = 4 * length + 1;
 124                 char* multiStr = new char[multiLength];
 125
 126                 const UTF32* srcStart = reinterpret_cast<const UTF32*>(wideStr.c_str());
 127                 const UTF32* srcEnd = srcStart + length;
 128                 UTF8* targetStart = reinterpret_cast<UTF8*>(multiStr);
 129                 UTF8* targetEnd = targetStart + multiLength;
 130
 131                 ConversionResult res = ConvertUTF32toUTF8(&srcStart, srcEnd,
 132                                 &targetStart, targetEnd, lenientConversion);
 133                 if (res != conversionOK)
 134                 {
 135                         delete[] multiStr;
 136                         throw std::runtime_error("bad conversion from wide to multi-characters");
 137                 }
 138
 139                 *targetStart = 0;
 140                 std::string convertedStr(multiStr);
 141                 delete[] multiStr;
 142                 return convertedStr;
 143         }
 144         else
 145         {
 146                 throw std::runtime_error("unknown size of wide characters");
 147         }
 148         return "";
 149 }
 150
 151
 152 } // namespace dc
 153
 154 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 155