widget/os2/nsOS2Uni.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "nsOS2Uni.h"
   6 #include "nsIServiceManager.h"
   7 #include "nsIPlatformCharset.h"
   8 #include <stdlib.h>
   9
  10
  11 /**********************************************************
  12     OS2Uni
  13  **********************************************************/
  14 nsICharsetConverterManager* OS2Uni::gCharsetManager = nullptr;
  15
  16 struct ConverterInfo
  17 {
  18   uint16_t            mCodePage;
  19   const char*         mConvName;
  20   nsIUnicodeEncoder*  mEncoder;
  21   nsIUnicodeDecoder*  mDecoder;
  22 };
  23
  24 #define eCONVERTER_COUNT  17
  25 ConverterInfo gConverterInfo[eCONVERTER_COUNT] =
  26 {
  27   { 0,    "",              nullptr,  nullptr },
  28   { 1252, "windows-1252",  nullptr,  nullptr },
  29   { 1208, "UTF-8",         nullptr,  nullptr },
  30   { 1250, "windows-1250",  nullptr,  nullptr },
  31   { 1251, "windows-1251",  nullptr,  nullptr },
  32   { 813,  "ISO-8859-7",    nullptr,  nullptr },
  33   { 1254, "windows-1254",  nullptr,  nullptr },
  34   { 864,  "IBM864",        nullptr,  nullptr },
  35   { 1257, "windows-1257",  nullptr,  nullptr },
  36   { 874,  "windows-874",   nullptr,  nullptr },
  37   { 932,  "Shift_JIS",     nullptr,  nullptr },
  38   { 943,  "Shift_JIS",     nullptr,  nullptr },
  39   { 1381, "GB2312",        nullptr,  nullptr },
  40   { 1386, "GB2312",        nullptr,  nullptr },
  41   { 949,  "EUC-KR",        nullptr,  nullptr },
  42   { 950,  "Big5",          nullptr,  nullptr },
  43   { 1361, "x-johab",       nullptr,  nullptr }
  44 };
  45
  46 nsISupports*
  47 OS2Uni::GetUconvObject(int aCodePage, ConverterRequest aReq)
  48 {
  49   if (gCharsetManager == nullptr) {
  50     CallGetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &gCharsetManager);
  51   }
  52
  53   nsresult rv;
  54   nsISupports* uco = nullptr;
  55   for (int i = 0; i < eCONVERTER_COUNT; i++) {
  56     if (aCodePage == gConverterInfo[i].mCodePage) {
  57       if (gConverterInfo[i].mEncoder == nullptr) {
  58         const char* convname;
  59         nsAutoCString charset;
  60         if (aCodePage == 0) {
  61           nsCOMPtr<nsIPlatformCharset>
  62                       plat(do_GetService(NS_PLATFORMCHARSET_CONTRACTID, &rv));
  63           if (NS_SUCCEEDED(rv)) {
  64             plat->GetCharset(kPlatformCharsetSel_FileName, charset);
  65           } else {
  66             // default to IBM850 if this should fail
  67             charset = "IBM850";
  68           }
  69           convname = charset.get();
  70         } else {
  71           convname = gConverterInfo[i].mConvName;
  72         }
  73         rv = gCharsetManager->GetUnicodeEncoderRaw(convname,
  74                                                    &gConverterInfo[i].mEncoder);
  75         gConverterInfo[i].mEncoder->
  76                     SetOutputErrorBehavior(nsIUnicodeEncoder::kOnError_Replace,
  77                                            nullptr, '?');
  78         gCharsetManager->GetUnicodeDecoderRaw(convname,
  79                                               &gConverterInfo[i].mDecoder);
  80         NS_ASSERTION(NS_SUCCEEDED(rv), "Failed to get converter");
  81       }
  82       if (aReq == eConv_Encoder) {
  83         uco = gConverterInfo[i].mEncoder;
  84       } else {
  85         uco = gConverterInfo[i].mDecoder;
  86       }
  87       break;
  88     }
  89   }
  90
  91   return uco;
  92 }
  93
  94 void OS2Uni::FreeUconvObjects()
  95 {
  96   for (int i = 0; i < eCONVERTER_COUNT; i++) {
  97     NS_IF_RELEASE(gConverterInfo[i].mEncoder);
  98     NS_IF_RELEASE(gConverterInfo[i].mDecoder);
  99   }
 100   NS_IF_RELEASE(gCharsetManager);
 101 }
 102
 103 /**********************************************************
 104     WideCharToMultiByte
 105  **********************************************************/
 106 nsresult
 107 WideCharToMultiByte(int aCodePage, const PRUnichar* aSrc,
 108                     int32_t aSrcLength, nsAutoCharBuffer& aResult,
 109                     int32_t& aResultLength)
 110 {
 111   nsresult rv;
 112   nsISupports* sup = OS2Uni::GetUconvObject(aCodePage, eConv_Encoder);
 113   nsCOMPtr<nsIUnicodeEncoder> uco = do_QueryInterface(sup);
 114
 115   if (NS_FAILED(uco->GetMaxLength(aSrc, aSrcLength, &aResultLength))) {
 116     return NS_ERROR_UNEXPECTED;
 117   }
 118   if (!aResult.SetLength(aResultLength + 1))
 119     return NS_ERROR_OUT_OF_MEMORY;
 120   char* str = aResult.Elements();
 121
 122   rv = uco->Convert(aSrc, &aSrcLength, str, &aResultLength);
 123   aResult[aResultLength] = '\0';
 124   return rv;
 125 }
 126
 127 /**********************************************************
 128     MultiByteToWideChar
 129  **********************************************************/
 130 nsresult
 131 MultiByteToWideChar(int aCodePage, const char* aSrc,
 132                     int32_t aSrcLength, nsAutoChar16Buffer& aResult,
 133                     int32_t& aResultLength)
 134 {
 135   nsresult rv;
 136   nsISupports* sup = OS2Uni::GetUconvObject(aCodePage, eConv_Decoder);
 137   nsCOMPtr<nsIUnicodeDecoder> uco = do_QueryInterface(sup);
 138
 139   if (NS_FAILED(uco->GetMaxLength(aSrc, aSrcLength, &aResultLength))) {
 140     return NS_ERROR_UNEXPECTED;
 141   }
 142   if (!aResult.SetLength(aResultLength + 1))
 143     return NS_ERROR_OUT_OF_MEMORY;
 144   PRUnichar* str = aResult.Elements();
 145
 146   rv = uco->Convert(aSrc, &aSrcLength, str, &aResultLength);
 147   aResult[aResultLength] = '\0';
 148   return rv;
 149 }