LCOV - code coverage report
Current view: directory - intl/uconv/ucvko - nsISO2022KRToUnicode.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 108 60 55.6 %
Date: 2012-06-02 Functions: 1 1 100.0 %

       1                 : /* -*- Mode: C; tab-width: 4; 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.org 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                 :  *   Jungshik Shin <jshin@mailaps.org>
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      27                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : #include "nsISO2022KRToUnicode.h"
      39                 : #include "nsUCSupport.h"
      40                 : #include "nsICharsetConverterManager.h"
      41                 : #include "nsIServiceManager.h"
      42                 : 
      43                 : static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
      44                 : 
      45              11 : NS_IMETHODIMP nsISO2022KRToUnicode::Convert(const char * aSrc, PRInt32 * aSrcLen, PRUnichar * aDest, PRInt32 * aDestLen)
      46                 : {
      47              11 :   const unsigned char* srcEnd = (unsigned char*)aSrc + *aSrcLen;
      48              11 :   const unsigned char* src =(unsigned char*) aSrc;
      49              11 :   PRUnichar* destEnd = aDest + *aDestLen;
      50              11 :   PRUnichar* dest = aDest;
      51             298 :   while((src < srcEnd))
      52                 :   {
      53                 :     // if LF/CR, return to US-ASCII unconditionally.
      54             276 :     if ( *src == 0x0a || *src == 0x0d )
      55               6 :       mState = mState_Init;
      56                 : 
      57             276 :     switch(mState)
      58                 :     {
      59                 :       case mState_Init:
      60              11 :         if(0x1b == *src) {
      61               4 :           mLastLegalState = mState_ASCII;
      62               4 :           mState = mState_ESC;
      63               4 :           break;
      64                 :         }
      65               7 :         mState = mState_ASCII;
      66                 :         // fall through
      67                 : 
      68                 :       case mState_ASCII:
      69              99 :         if(0x0e == *src) { // Shift-Out 
      70              29 :           mState = mState_KSX1001_1992;
      71              29 :           mRunLength = 0;
      72                 :         } 
      73              70 :         else if(*src & 0x80) {
      74               0 :           if (CHECK_OVERRUN(dest, destEnd, 1))
      75               0 :             goto error1;
      76               0 :           *dest++ = 0xFFFD;
      77                 :         } 
      78                 :         else {
      79              70 :           if (CHECK_OVERRUN(dest, destEnd, 1))
      80               0 :             goto error1;
      81              70 :           *dest++ = (PRUnichar) *src;
      82                 :         }
      83              99 :         break;
      84                 :           
      85                 :       case mState_ESC:
      86               4 :         if('$' == *src) {
      87               4 :           mState = mState_ESC_24;
      88                 :         } 
      89                 :         else  {
      90               0 :           if (CHECK_OVERRUN(dest, destEnd, 2))
      91               0 :             goto error1;
      92               0 :           *dest++ = (PRUnichar) 0x1b;
      93               0 :           *dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
      94               0 :           mState =  mLastLegalState;
      95                 :         }
      96               4 :         break;
      97                 : 
      98                 :       case mState_ESC_24: // ESC $
      99               4 :         if(')' == *src) {
     100               4 :           mState = mState_ESC_24_29;
     101                 :         } 
     102                 :         else  {
     103               0 :           if (CHECK_OVERRUN(dest, destEnd, 3))
     104               0 :             goto error1;
     105               0 :           *dest++ = (PRUnichar) 0x1b;
     106               0 :           *dest++ = (PRUnichar) '$';
     107               0 :           *dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
     108               0 :           mState = mLastLegalState;
     109                 :         }
     110               4 :         break;
     111                 : 
     112                 :       case mState_ESC_24_29: // ESC $ )
     113               4 :         mState = mLastLegalState;
     114               4 :         if('C' == *src) {
     115               4 :           mState = mState_ASCII;
     116               4 :           mRunLength = 0;
     117                 :         } 
     118                 :         else  {
     119               0 :           if (CHECK_OVERRUN(dest, destEnd, 4))
     120               0 :             goto error1;
     121               0 :           *dest++ = (PRUnichar) 0x1b;
     122               0 :           *dest++ = (PRUnichar) '$';
     123               0 :           *dest++ = (PRUnichar) ')';
     124               0 :           *dest++ = (0x80 & *src) ? 0xFFFD : (PRUnichar) *src;
     125               0 :           mState = mLastLegalState;
     126                 :         }
     127               4 :         break;
     128                 : 
     129                 :       case mState_KSX1001_1992:
     130              91 :         if (0x20 < (PRUint8) *src  && (PRUint8) *src < 0x7f) {
     131              70 :           mData = (PRUint8) *src;
     132              70 :           mState = mState_KSX1001_1992_2ndbyte;
     133                 :         } 
     134              21 :         else if (0x0f == *src) { // Shift-In (SI)
     135              21 :           mState = mState_ASCII;
     136              21 :           if (mRunLength == 0) {
     137               1 :             if (CHECK_OVERRUN(dest, destEnd, 1))
     138               0 :               goto error1;
     139               1 :             *dest++ = 0xFFFD;
     140                 :           }
     141              21 :           mRunLength = 0;
     142                 :         } 
     143               0 :         else if ((PRUint8) *src == 0x20 || (PRUint8) *src == 0x09) {
     144                 :           // Allow space and tab between SO and SI (i.e. in Hangul segment)
     145               0 :           if (CHECK_OVERRUN(dest, destEnd, 1))
     146               0 :             goto error1;
     147               0 :           mState = mState_KSX1001_1992;
     148               0 :           *dest++ = (PRUnichar) *src;
     149               0 :           ++mRunLength;
     150                 :         } 
     151                 :         else {         // Everything else is invalid.
     152               0 :           if (CHECK_OVERRUN(dest, destEnd, 1))
     153               0 :             goto error1;
     154               0 :           *dest++ = 0xFFFD;
     155                 :         }
     156              91 :         break;
     157                 : 
     158                 :       case mState_KSX1001_1992_2ndbyte:
     159              70 :         if ( 0x20 < (PRUint8) *src && (PRUint8) *src < 0x7f  ) {
     160              70 :           if (!mEUCKRDecoder) {
     161                 :             // creating a delegate converter (EUC-KR)
     162                 :             nsresult rv;
     163                 :             nsCOMPtr<nsICharsetConverterManager> ccm = 
     164               8 :                   do_GetService(kCharsetConverterManagerCID, &rv);
     165               4 :             if (NS_SUCCEEDED(rv)) {
     166               4 :               rv = ccm->GetUnicodeDecoderRaw("EUC-KR", &mEUCKRDecoder);
     167                 :             }
     168                 :           }
     169                 : 
     170              70 :           if (!mEUCKRDecoder) {// failed creating a delegate converter
     171               0 :            *dest++ = 0xFFFD;
     172                 :           } 
     173                 :           else {              
     174              70 :             if (CHECK_OVERRUN(dest, destEnd, 1))
     175               0 :               goto error1;
     176                 :             unsigned char ksx[2];
     177                 :             PRUnichar uni;
     178              70 :             PRInt32 ksxLen = 2, uniLen = 1;
     179                 :             // mData is the original 1st byte.
     180                 :             // *src is the present 2nd byte.
     181                 :             // Put 2 bytes (one character) to ksx[] with EUC-KR encoding.
     182              70 :             ksx[0] = mData | 0x80;
     183              70 :             ksx[1] = *src | 0x80;
     184                 :             // Convert EUC-KR to unicode.
     185              70 :             mEUCKRDecoder->Convert((const char *)ksx, &ksxLen, &uni, &uniLen);
     186              70 :             *dest++ = uni;
     187              70 :             ++mRunLength;
     188                 :           }
     189              70 :           mState = mState_KSX1001_1992;
     190                 :         } 
     191                 :         else {        // Invalid 
     192               0 :           if ( 0x0f == *src ) {   // Shift-In (SI)
     193               0 :             mState = mState_ASCII;
     194                 :           } 
     195                 :           else {
     196               0 :             mState = mState_KSX1001_1992;
     197                 :           }
     198               0 :           if (CHECK_OVERRUN(dest, destEnd, 1))
     199               0 :             goto error1;
     200               0 :           *dest++ = 0xFFFD;
     201                 :         }
     202              70 :         break;
     203                 : 
     204                 :       case mState_ERROR:
     205               0 :         mState = mLastLegalState;
     206               0 :         if (CHECK_OVERRUN(dest, destEnd, 1))
     207               0 :           goto error1;
     208               0 :         *dest++ = 0xFFFD;
     209               0 :         break;
     210                 : 
     211                 :     } // switch
     212             276 :     src++;
     213                 :   }
     214              11 :   *aDestLen = dest - aDest;
     215              11 :   return NS_OK;
     216                 : 
     217                 : error1:
     218               0 :   *aDestLen = dest-aDest;
     219               0 :   *aSrcLen = src-(unsigned char*)aSrc;
     220               0 :   return NS_OK_UDEC_MOREOUTPUT;
     221                 : }
     222                 : 

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