LCOV - code coverage report
Current view: directory - intl/uconv/src - nsUTF8ConverterService.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 46 27 58.7 %
Date: 2012-06-02 Functions: 6 5 83.3 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* vim:expandtab:shiftwidth=2:tabstop=4: 
       3                 :  */
       4                 : /* ***** BEGIN LICENSE BLOCK *****
       5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       6                 :  *
       7                 :  * The contents of this file are subject to the Mozilla Public License Version
       8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       9                 :  * the License. You may obtain a copy of the License at
      10                 :  * http://www.mozilla.org/MPL/
      11                 :  *
      12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      14                 :  * for the specific language governing rights and limitations under the
      15                 :  * License.
      16                 :  *
      17                 :  * The Original Code is mozilla.org code.
      18                 :  *
      19                 :  * The Initial Developers of the Original Code are
      20                 :  * Naoki Hotta <nhotta@netscape.com> and Jungshik Shin <jshin@mailaps.org>.
      21                 :  * Portions created by the Initial Developer are Copyright (C) 2002, 2003
      22                 :  * the Initial Developers. All Rights Reserved.
      23                 :  *
      24                 :  * Contributor(s):
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      28                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : #include "nsString.h"
      40                 : #include "nsIUnicodeEncoder.h"
      41                 : #include "nsICharsetConverterManager.h"
      42                 : #include "nsReadableUtils.h"
      43                 : #include "nsIServiceManager.h"
      44                 : #include "prmem.h"
      45                 : #include "nsUTF8ConverterService.h"
      46                 : #include "nsEscape.h"
      47                 : #include "nsAutoPtr.h"
      48                 : 
      49            1205 : NS_IMPL_ISUPPORTS1(nsUTF8ConverterService, nsIUTF8ConverterService)
      50                 : 
      51                 : static nsresult 
      52               2 : ToUTF8(const nsACString &aString, const char *aCharset, nsACString &aResult)
      53                 : {
      54                 :   nsresult rv;
      55               2 :   if (!aCharset || !*aCharset)
      56               0 :     return NS_ERROR_INVALID_ARG;
      57                 : 
      58               4 :   nsCOMPtr<nsICharsetConverterManager> ccm;
      59                 : 
      60               2 :   ccm = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
      61               2 :   NS_ENSURE_SUCCESS(rv, rv);
      62                 : 
      63               4 :   nsCOMPtr<nsIUnicodeDecoder> unicodeDecoder;
      64               2 :   rv = ccm->GetUnicodeDecoder(aCharset,
      65               2 :                               getter_AddRefs(unicodeDecoder));
      66               2 :   NS_ENSURE_SUCCESS(rv, rv);
      67                 : 
      68               2 :   PRInt32 srcLen = aString.Length();
      69                 :   PRInt32 dstLen;
      70               4 :   const nsAFlatCString& inStr = PromiseFlatCString(aString);
      71               2 :   rv = unicodeDecoder->GetMaxLength(inStr.get(), srcLen, &dstLen);
      72               2 :   NS_ENSURE_SUCCESS(rv, rv);
      73                 : 
      74               6 :   nsAutoArrayPtr<PRUnichar> ustr(new PRUnichar[dstLen]);
      75               2 :   NS_ENSURE_TRUE(ustr, NS_ERROR_OUT_OF_MEMORY);
      76                 : 
      77               2 :   rv = unicodeDecoder->Convert(inStr.get(), &srcLen, ustr, &dstLen);
      78               2 :   if (NS_SUCCEEDED(rv)){
      79                 :     // Tru64 Cxx needs an explicit get()
      80               0 :     CopyUTF16toUTF8(Substring(ustr.get(), ustr + dstLen), aResult);
      81                 :   }
      82               2 :   return rv;
      83                 : }
      84                 : 
      85                 : NS_IMETHODIMP  
      86             237 : nsUTF8ConverterService::ConvertStringToUTF8(const nsACString &aString, 
      87                 :                                             const char *aCharset, 
      88                 :                                             bool aSkipCheck, 
      89                 :                                             nsACString &aUTF8String)
      90                 : {
      91                 :   // return if ASCII only or valid UTF-8 providing that the ASCII/UTF-8
      92                 :   // check is requested. It may not be asked for if a caller suspects
      93                 :   // that the input is in non-ASCII 7bit charset (ISO-2022-xx, HZ) or 
      94                 :   // it's in a charset other than UTF-8 that can be mistaken for UTF-8.
      95             237 :   if (!aSkipCheck && (IsASCII(aString) || IsUTF8(aString))) {
      96             235 :     aUTF8String = aString;
      97             235 :     return NS_OK;
      98                 :   }
      99                 : 
     100               2 :   aUTF8String.Truncate();
     101                 : 
     102               2 :   nsresult rv = ToUTF8(aString, aCharset, aUTF8String);
     103                 : 
     104                 :   // additional protection for cases where check is skipped and  the input
     105                 :   // is actually in UTF-8 as opposed to aCharset. (i.e. caller's hunch
     106                 :   // was wrong.) We don't check ASCIIness assuming there's no charset
     107                 :   // incompatible with ASCII (we don't support EBCDIC).
     108               2 :   if (aSkipCheck && NS_FAILED(rv) && IsUTF8(aString)) {
     109               0 :     aUTF8String = aString;
     110               0 :     return NS_OK;
     111                 :   }
     112                 : 
     113               2 :   return rv;
     114                 : }
     115                 : 
     116                 : NS_IMETHODIMP  
     117               0 : nsUTF8ConverterService::ConvertURISpecToUTF8(const nsACString &aSpec, 
     118                 :                                              const char *aCharset, 
     119                 :                                              nsACString &aUTF8Spec)
     120                 : {
     121                 :   // assume UTF-8 if the spec contains unescaped non-ASCII characters.
     122                 :   // No valid spec in Mozilla would break this assumption.
     123               0 :   if (!IsASCII(aSpec)) {
     124               0 :     aUTF8Spec = aSpec;
     125               0 :     return NS_OK;
     126                 :   }
     127                 : 
     128               0 :   aUTF8Spec.Truncate();
     129                 : 
     130               0 :   nsCAutoString unescapedSpec; 
     131                 :   // NS_UnescapeURL does not fill up unescapedSpec unless there's at least 
     132                 :   // one character to unescape.
     133               0 :   bool written = NS_UnescapeURL(PromiseFlatCString(aSpec).get(), aSpec.Length(), 
     134               0 :                                   esc_OnlyNonASCII, unescapedSpec);
     135                 : 
     136               0 :   if (!written) {
     137               0 :     aUTF8Spec = aSpec;
     138               0 :     return NS_OK;
     139                 :   }
     140                 :   // return if ASCII only or escaped UTF-8
     141               0 :   if (IsASCII(unescapedSpec) || IsUTF8(unescapedSpec)) {
     142               0 :     aUTF8Spec = unescapedSpec;
     143               0 :     return NS_OK;
     144                 :   }
     145                 : 
     146               0 :   return ToUTF8(unescapedSpec, aCharset, aUTF8Spec);
     147                 : }
     148                 : 

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