michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "unicpriv.h"
michael@0: #include "nsUnicodeEncodeHelper.h"
michael@0: #include "nsDebug.h"
michael@0: 
michael@0: //----------------------------------------------------------------------
michael@0: // Class nsUnicodeEncodeHelper [implementation]
michael@0: nsresult nsUnicodeEncodeHelper::ConvertByTable(
michael@0:                                      const char16_t * aSrc, 
michael@0:                                      int32_t * aSrcLength, 
michael@0:                                      char * aDest, 
michael@0:                                      int32_t * aDestLength, 
michael@0:                                      uScanClassID aScanClass,
michael@0:                                      uShiftOutTable * aShiftOutTable,
michael@0:                                      uMappingTable  * aMappingTable)
michael@0: {
michael@0:   const char16_t * src = aSrc;
michael@0:   const char16_t * srcEnd = aSrc + *aSrcLength;
michael@0:   char * dest = aDest;
michael@0:   int32_t destLen = *aDestLength;
michael@0: 
michael@0:   char16_t med;
michael@0:   int32_t bcw; // byte count for write;
michael@0:   nsresult res = NS_OK;
michael@0: 
michael@0:   while (src < srcEnd) {
michael@0:     if (!uMapCode((uTable*) aMappingTable, static_cast<char16_t>(*(src++)), reinterpret_cast<uint16_t*>(&med))) {
michael@0:       if (aScanClass == u1ByteCharset && *(src - 1) < 0x20) {
michael@0:         // some tables are missing the 0x00 - 0x20 part
michael@0:         med = *(src - 1);
michael@0:       } else {
michael@0:         res = NS_ERROR_UENC_NOMAPPING;
michael@0:         break;
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     bool charFound;
michael@0:     if (aScanClass == uMultibytesCharset) {
michael@0:       NS_ASSERTION(aShiftOutTable, "shift table missing");
michael@0:       charFound = uGenerateShift(aShiftOutTable, 0, med,
michael@0:                                  (uint8_t *)dest, destLen, 
michael@0:                                  (uint32_t *)&bcw);
michael@0:     } else {
michael@0:       charFound = uGenerate(aScanClass, 0, med,
michael@0:                             (uint8_t *)dest, destLen, 
michael@0:                             (uint32_t *)&bcw);
michael@0:     }
michael@0:     if (!charFound) {
michael@0:       src--;
michael@0:       res = NS_OK_UENC_MOREOUTPUT;
michael@0:       break;
michael@0:     }
michael@0: 
michael@0:     dest += bcw;
michael@0:     destLen -= bcw;
michael@0:   }
michael@0: 
michael@0:   *aSrcLength = src - aSrc;
michael@0:   *aDestLength  = dest - aDest;
michael@0:   return res;
michael@0: }
michael@0: 
michael@0: nsresult nsUnicodeEncodeHelper::ConvertByMultiTable(
michael@0:                                      const char16_t * aSrc, 
michael@0:                                      int32_t * aSrcLength, 
michael@0:                                      char * aDest, 
michael@0:                                      int32_t * aDestLength, 
michael@0:                                      int32_t aTableCount, 
michael@0:                                      uScanClassID * aScanClassArray,
michael@0:                                      uShiftOutTable ** aShiftOutTable, 
michael@0:                                      uMappingTable  ** aMappingTable)
michael@0: {
michael@0:   const char16_t * src = aSrc;
michael@0:   const char16_t * srcEnd = aSrc + *aSrcLength;
michael@0:   char * dest = aDest;
michael@0:   int32_t destLen = *aDestLength;
michael@0: 
michael@0:   char16_t med;
michael@0:   int32_t bcw; // byte count for write;
michael@0:   nsresult res = NS_OK;
michael@0:   int32_t i;
michael@0: 
michael@0:   while (src < srcEnd) {
michael@0:     for (i=0; i<aTableCount; i++) 
michael@0:       if (uMapCode((uTable*) aMappingTable[i], static_cast<uint16_t>(*src), reinterpret_cast<uint16_t*>(&med))) break;
michael@0: 
michael@0:     src++;
michael@0:     if (i == aTableCount) {
michael@0:       res = NS_ERROR_UENC_NOMAPPING;
michael@0:       break;
michael@0:     }
michael@0: 
michael@0:     bool charFound;
michael@0:     if (aScanClassArray[i] == uMultibytesCharset) {
michael@0:       NS_ASSERTION(aShiftOutTable[i], "shift table missing");
michael@0:       charFound = uGenerateShift(aShiftOutTable[i], 0, med,
michael@0:                                  (uint8_t *)dest, destLen,
michael@0:                                  (uint32_t *)&bcw);
michael@0:     }
michael@0:     else
michael@0:       charFound = uGenerate(aScanClassArray[i], 0, med,
michael@0:                             (uint8_t *)dest, destLen, 
michael@0:                             (uint32_t *)&bcw);
michael@0:     if (!charFound) { 
michael@0:       src--;
michael@0:       res = NS_OK_UENC_MOREOUTPUT;
michael@0:       break;
michael@0:     }
michael@0: 
michael@0:     dest += bcw;
michael@0:     destLen -= bcw;
michael@0:   }
michael@0: 
michael@0:   *aSrcLength = src - aSrc;
michael@0:   *aDestLength  = dest - aDest;
michael@0:   return res;
michael@0: }