ucb/source/ucp/webdav/LockEntrySequence.cxx

   1 /*************************************************************************
   2  *
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * Copyright 2008 by Sun Microsystems, Inc.
   6  *
   7  * OpenOffice.org - a multi-platform office productivity suite
   8  *
   9  * $RCSfile: LockEntrySequence.cxx,v $
  10  * $Revision: 1.16 $
  11  *
  12  * This file is part of OpenOffice.org.
  13  *
  14  * OpenOffice.org is free software: you can redistribute it and/or modify
  15  * it under the terms of the GNU Lesser General Public License version 3
  16  * only, as published by the Free Software Foundation.
  17  *
  18  * OpenOffice.org is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU Lesser General Public License version 3 for more details
  22  * (a copy is included in the LICENSE file that accompanied this code).
  23  *
  24  * You should have received a copy of the GNU Lesser General Public License
  25  * version 3 along with OpenOffice.org.  If not, see
  26  * <http://www.openoffice.org/license.html>
  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_ucb.hxx"
  33
  34 #include <string.h>
  35 #include <ne_xml.h>
  36 #include "LockEntrySequence.hxx"
  37
  38 using namespace webdav_ucp;
  39 using namespace com::sun::star;
  40
  41 //////////////////////////////////////////////////////////////////////////
  42
  43 struct LockEntrySequenceParseContext
  44 {
  45     ucb::LockEntry * pEntry;
  46     bool hasScope;
  47     bool hasType;
  48
  49     LockEntrySequenceParseContext()
  50     : pEntry( 0 ), hasScope( false ), hasType( false ) {}
  51     ~LockEntrySequenceParseContext() { delete pEntry; }
  52 };
  53
  54 #define STATE_TOP (1)
  55
  56 #define STATE_LOCKENTRY (STATE_TOP)
  57 #define STATE_LOCKSCOPE (STATE_TOP + 1)
  58 #define STATE_EXCLUSIVE (STATE_TOP + 2)
  59 #define STATE_SHARED    (STATE_TOP + 3)
  60 #define STATE_LOCKTYPE  (STATE_TOP + 4)
  61 #define STATE_WRITE     (STATE_TOP + 5)
  62
  63 //////////////////////////////////////////////////////////////////////////
  64 extern "C" int LockEntrySequence_startelement_callback(
  65     void *,
  66     int parent,
  67     const char *nspace,
  68     const char *name,
  69     const char ** )
  70 {
  71     if ( ( name != 0 ) &&
  72          ( ( nspace == 0 ) || ( strcmp( nspace, "" ) == 0 ) ) )
  73     {
  74         switch ( parent )
  75         {
  76             case NE_XML_STATEROOT:
  77                 if ( strcmp( name, "lockentry" ) == 0 )
  78                     return STATE_LOCKENTRY;
  79                 break;
  80
  81             case STATE_LOCKENTRY:
  82                 if ( strcmp( name, "lockscope" ) == 0 )
  83                     return STATE_LOCKSCOPE;
  84                 else if ( strcmp( name, "locktype" ) == 0 )
  85                     return STATE_LOCKTYPE;
  86                 break;
  87
  88             case STATE_LOCKSCOPE:
  89                 if ( strcmp( name, "exclusive" ) == 0 )
  90                     return STATE_EXCLUSIVE;
  91                 else if ( strcmp( name, "shared" ) == 0 )
  92                     return STATE_SHARED;
  93                 break;
  94
  95             case STATE_LOCKTYPE:
  96                 if ( strcmp( name, "write" ) == 0 )
  97                     return STATE_WRITE;
  98                 break;
  99         }
 100     }
 101     return NE_XML_DECLINE;
 102 }
 103
 104 //////////////////////////////////////////////////////////////////////////
 105 extern "C" int LockEntrySequence_chardata_callback(
 106     void *,
 107     int,
 108     const char *,
 109     size_t )
 110 {
 111     return 0; // zero to continue, non-zero to abort parsing
 112 }
 113
 114 //////////////////////////////////////////////////////////////////////////
 115 extern "C" int LockEntrySequence_endelement_callback(
 116     void *userdata,
 117     int state,
 118     const char *,
 119     const char * )
 120 {
 121     LockEntrySequenceParseContext * pCtx
 122                 = static_cast< LockEntrySequenceParseContext * >( userdata );
 123     if ( !pCtx->pEntry )
 124         pCtx->pEntry = new ucb::LockEntry;
 125
 126     switch ( state )
 127     {
 128         case STATE_EXCLUSIVE:
 129             pCtx->pEntry->Scope = ucb::LockScope_EXCLUSIVE;
 130             pCtx->hasScope = true;
 131             break;
 132
 133         case STATE_SHARED:
 134             pCtx->pEntry->Scope = ucb::LockScope_SHARED;
 135             pCtx->hasScope = true;
 136             break;
 137
 138         case STATE_WRITE:
 139             pCtx->pEntry->Type = ucb::LockType_WRITE;
 140             pCtx->hasType = true;
 141             break;
 142
 143         case STATE_LOCKSCOPE:
 144             if ( !pCtx->hasScope )
 145                 return 1; // abort
 146             break;
 147
 148         case STATE_LOCKTYPE:
 149             if ( !pCtx->hasType )
 150                 return 1; // abort
 151             break;
 152
 153         case STATE_LOCKENTRY:
 154             if ( !pCtx->hasType || !pCtx->hasType )
 155                 return 1; // abort
 156             break;
 157
 158         default:
 159             break;
 160     }
 161     return 0; // zero to continue, non-zero to abort parsing
 162 }
 163
 164 //////////////////////////////////////////////////////////////////////////
 165 // static
 166 bool LockEntrySequence::createFromXML( const rtl::OString & rInData,
 167                                        uno::Sequence<
 168                                                ucb::LockEntry > & rOutData )
 169 {
 170     const sal_Int32 TOKEN_LENGTH = 12; // </lockentry>
 171     bool success = true;
 172
 173     // rInData may contain multiple <lockentry>...</lockentry> tags.
 174     sal_Int32 nCount = 0;
 175     sal_Int32 nStart = 0;
 176     sal_Int32 nEnd   = rInData.indexOf( "</lockentry>" );
 177     while ( nEnd > -1 )
 178     {
 179         ne_xml_parser * parser = ne_xml_create();
 180         if ( !parser )
 181         {
 182             success = false;
 183             break;
 184         }
 185
 186         LockEntrySequenceParseContext aCtx;
 187         ne_xml_push_handler( parser,
 188                              LockEntrySequence_startelement_callback,
 189                              LockEntrySequence_chardata_callback,
 190                              LockEntrySequence_endelement_callback,
 191                              &aCtx );
 192
 193         ne_xml_parse( parser,
 194                        rInData.getStr() + nStart,
 195                        nEnd - nStart + TOKEN_LENGTH );
 196
 197 #if NEON_VERSION >= 0x0250
 198         success = !ne_xml_failed( parser );
 199 #else
 200         success = !!ne_xml_valid( parser );
 201 #endif
 202
 203         ne_xml_destroy( parser );
 204
 205         if ( !success )
 206             break;
 207
 208         if ( aCtx.pEntry )
 209         {
 210             nCount++;
 211             if ( nCount > rOutData.getLength() )
 212                 rOutData.realloc( rOutData.getLength() + 2 );
 213
 214             rOutData[ nCount - 1 ] = *aCtx.pEntry;
 215         }
 216
 217         nStart = nEnd + TOKEN_LENGTH + 1;
 218         nEnd   = rInData.indexOf( "</lockentry>", nStart );
 219     }
 220
 221     rOutData.realloc( nCount );
 222     return success;
 223 }