LCOV - code coverage report
Current view: directory - intl/uconv/ucvlatin - nsUnicodeToUCS2BE.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 59 43 72.9 %
Date: 2012-06-02 Functions: 8 7 87.5 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Mozilla Communicator client code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : #include "nsUnicodeToUCS2BE.h"
      39                 : #include <string.h>
      40                 : 
      41                 : inline static void SwapBytes(char *aDest, const PRUnichar* aSrc, PRInt32 aLen);
      42                 : 
      43              33 : NS_IMETHODIMP nsUnicodeToUTF16BE::Convert(const PRUnichar * aSrc, PRInt32 * aSrcLength, 
      44                 :       char * aDest, PRInt32 * aDestLength)
      45                 : {
      46              33 :   PRInt32 srcInLen = *aSrcLength;
      47              33 :   PRInt32 destInLen = *aDestLength;
      48              33 :   PRInt32 srcOutLen = 0;
      49              33 :   PRInt32 destOutLen = 0;
      50                 :   PRInt32 copyCharLen;
      51              33 :   PRUnichar *p = (PRUnichar*)aDest;
      52                 :  
      53                 :   // Handle BOM if necessary 
      54              33 :   if(0!=mBOM)
      55                 :   {
      56               7 :      if(destInLen <2)
      57               0 :         goto needmoreoutput;
      58                 :   
      59               7 :      *p++ = mBOM;
      60               7 :      mBOM = 0;
      61               7 :      destOutLen +=2;
      62                 :   }
      63                 :   // find out the length of copy 
      64                 : 
      65              33 :   copyCharLen = srcInLen;
      66              33 :   if(copyCharLen > (destInLen - destOutLen) / 2) {
      67               0 :      copyCharLen = (destInLen - destOutLen) / 2;
      68                 :   }
      69                 : 
      70                 :   // copy the data  by swaping 
      71              33 :   CopyData((char*)p , aSrc, copyCharLen );
      72                 : 
      73              33 :   srcOutLen += copyCharLen;
      74              33 :   destOutLen += copyCharLen * 2;
      75              33 :   if(copyCharLen < srcInLen)
      76               0 :       goto needmoreoutput;
      77                 :   
      78              33 :   *aSrcLength = srcOutLen;
      79              33 :   *aDestLength = destOutLen;
      80              33 :   return NS_OK;
      81                 : 
      82                 : needmoreoutput:
      83               0 :   *aSrcLength = srcOutLen;
      84               0 :   *aDestLength = destOutLen;
      85               0 :   return NS_OK_UENC_MOREOUTPUT;
      86                 : }
      87                 : 
      88              33 : NS_IMETHODIMP nsUnicodeToUTF16BE::GetMaxLength(const PRUnichar * aSrc, PRInt32 aSrcLength, 
      89                 :       PRInt32 * aDestLength)
      90                 : {
      91              33 :   if(0 != mBOM)
      92               7 :     *aDestLength = 2*(aSrcLength+1);
      93                 :   else 
      94              26 :     *aDestLength = 2*aSrcLength;
      95              33 :   return NS_OK_UENC_EXACTLENGTH;
      96                 : }
      97                 : 
      98               6 : NS_IMETHODIMP nsUnicodeToUTF16BE::Finish(char * aDest, PRInt32 * aDestLength)
      99                 : {
     100               6 :   if(0 != mBOM)
     101                 :   {
     102               0 :      if(*aDestLength >= 2)
     103                 :      {
     104               0 :         *((PRUnichar*)aDest)= mBOM;
     105               0 :         mBOM=0;
     106               0 :         *aDestLength = 2;
     107               0 :         return NS_OK;  
     108                 :      } else {
     109               0 :         *aDestLength = 0;
     110               0 :         return NS_OK;  // xxx should be error
     111                 :      }
     112                 :   } else { 
     113               6 :      *aDestLength = 0;
     114               6 :      return NS_OK;
     115                 :   } 
     116                 : }
     117                 : 
     118               0 : NS_IMETHODIMP nsUnicodeToUTF16BE::Reset()
     119                 : {
     120               0 :   mBOM = 0;
     121               0 :   return NS_OK;
     122                 : }
     123                 : 
     124              32 : NS_IMETHODIMP nsUnicodeToUTF16BE::SetOutputErrorBehavior(PRInt32 aBehavior, 
     125                 :       nsIUnicharEncoder * aEncoder, PRUnichar aChar)
     126                 : {
     127              32 :   return NS_OK;
     128                 : }
     129                 : 
     130              13 : NS_IMETHODIMP nsUnicodeToUTF16BE::CopyData(char* aDest, const PRUnichar* aSrc, PRInt32 aLen  )
     131                 : {
     132                 : #ifdef IS_BIG_ENDIAN
     133                 :   //UnicodeToUTF16SameEndian
     134                 :   ::memcpy(aDest, (void*) aSrc, aLen * 2);
     135                 : #elif defined(IS_LITTLE_ENDIAN)
     136                 :   //UnicodeToUTF16DiffEndian
     137              13 :   SwapBytes(aDest, aSrc, aLen);
     138                 : #else
     139                 :   #error "Unknown endianness"
     140                 : #endif
     141              13 :   return NS_OK;
     142                 : }
     143                 : 
     144              20 : NS_IMETHODIMP nsUnicodeToUTF16LE::CopyData(char* aDest, const PRUnichar* aSrc, PRInt32 aLen  )
     145                 : {
     146                 : #ifdef IS_LITTLE_ENDIAN
     147                 :   //UnicodeToUTF16SameEndian
     148              20 :   ::memcpy(aDest, (void*) aSrc, aLen * 2);
     149                 : #elif defined(IS_BIG_ENDIAN)
     150                 :   //UnicodeToUTF16DiffEndian
     151                 :   SwapBytes(aDest, aSrc, aLen);
     152                 : #else
     153                 :   #error "Unknown endianness"
     154                 : #endif
     155              20 :   return NS_OK;
     156                 : }
     157                 : 
     158              13 : inline void SwapBytes(char *aDest, const PRUnichar* aSrc, PRInt32 aLen)
     159                 : {
     160              13 :   PRUnichar *p = (PRUnichar*) aDest;
     161                 :   // copy the data  by swaping 
     162             164 :   for(PRInt32 i = 0; i < aLen; i++)
     163                 :   {
     164             151 :     PRUnichar aChar = *aSrc++;
     165             151 :     *p++ = (0x00FF & (aChar >> 8)) | (0xFF00 & (aChar << 8));
     166                 :   }
     167              13 : }
     168                 : 

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