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<div class="title">kfilterdev.cpp</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* This file is part of the KDE libraries</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (C) 2000 David Faure <faure@kde.org></span>
<a name="l00003"></a>00003 <span class="comment"></span>
<a name="l00004"></a>00004 <span class="comment"> This library is free software; you can redistribute it and/or</span>
<a name="l00005"></a>00005 <span class="comment"> modify it under the terms of the GNU Library General Public</span>
<a name="l00006"></a>00006 <span class="comment"> License version 2 as published by the Free Software Foundation.</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> This library is distributed in the hope that it will be useful,</span>
<a name="l00009"></a>00009 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00010"></a>00010 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00011"></a>00011 <span class="comment"> Library General Public License for more details.</span>
<a name="l00012"></a>00012 <span class="comment"></span>
<a name="l00013"></a>00013 <span class="comment"> You should have received a copy of the GNU Library General Public License</span>
<a name="l00014"></a>00014 <span class="comment"> along with this library; see the file COPYING.LIB. If not, write to</span>
<a name="l00015"></a>00015 <span class="comment"> the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,</span>
<a name="l00016"></a>00016 <span class="comment"> Boston, MA 02110-1301, USA.</span>
<a name="l00017"></a>00017 <span class="comment">*/</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include "kfilterdev.h"</span>
<a name="l00020"></a>00020 <span class="preprocessor">#include "kfilterbase.h"</span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <kdebug.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <stdio.h></span> <span class="comment">// for EOF</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <assert.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <qfile.h></span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="preprocessor">#define BUFFER_SIZE 8*1024</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span>
<a name="l00029"></a>00029 <span class="keyword">class </span>KFilterDev::KFilterDevPrivate
<a name="l00030"></a>00030 {
<a name="l00031"></a>00031 <span class="keyword">public</span>:
<a name="l00032"></a>00032 KFilterDevPrivate() : bNeedHeader(true), bSkipHeaders(false),
<a name="l00033"></a>00033 autoDeleteFilterBase(false), bOpenedUnderlyingDevice(false),
<a name="l00034"></a>00034 bIgnoreData(false){}
<a name="l00035"></a>00035 <span class="keywordtype">bool</span> bNeedHeader;
<a name="l00036"></a>00036 <span class="keywordtype">bool</span> bSkipHeaders;
<a name="l00037"></a>00037 <span class="keywordtype">bool</span> autoDeleteFilterBase;
<a name="l00038"></a>00038 <span class="keywordtype">bool</span> bOpenedUnderlyingDevice;
<a name="l00039"></a>00039 <span class="keywordtype">bool</span> bIgnoreData;
<a name="l00040"></a>00040 <a class="codeRef" href="qbytearray.html">QByteArray</a> buffer; <span class="comment">// Used as 'input buffer' when reading, as 'output buffer' when writing</span>
<a name="l00041"></a>00041 <a class="codeRef" href="qcstring.html">QCString</a> ungetchBuffer;
<a name="l00042"></a>00042 <a class="codeRef" href="qcstring.html">QCString</a> origFileName;
<a name="l00043"></a>00043 KFilterBase::Result result;
<a name="l00044"></a>00044 };
<a name="l00045"></a>00045
<a name="l00046"></a><a class="code" href="classKFilterDev.html#aab24827abc4d813c222af3a4fc46fe91">00046</a> <a class="code" href="classKFilterDev.html#aab24827abc4d813c222af3a4fc46fe91" title="Constructs a KFilterDev for a given filter (e.g.">KFilterDev::KFilterDev</a>( <a class="code" href="classKFilterBase.html" title="This is the base class for compression filters such as gzip and bzip2.">KFilterBase</a> * _filter, <span class="keywordtype">bool</span> autoDeleteFilterBase )
<a name="l00047"></a>00047 : filter(_filter)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 assert(filter);
<a name="l00050"></a>00050 d = <span class="keyword">new</span> KFilterDevPrivate;
<a name="l00051"></a>00051 d->autoDeleteFilterBase = autoDeleteFilterBase;
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053
<a name="l00054"></a><a class="code" href="classKFilterDev.html#adae6c39a80f3aad6b8387a8c3c2bedd5">00054</a> <a class="code" href="classKFilterDev.html#adae6c39a80f3aad6b8387a8c3c2bedd5" title="Destructs the KFilterDev.">KFilterDev::~KFilterDev</a>()
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <span class="keywordflow">if</span> ( <a class="codeRef" href="qiodevice.html#isOpen">isOpen</a>() )
<a name="l00057"></a>00057 <a class="code" href="classKFilterDev.html#aa1400ff3a0888e986cd677f5f4f8f59a" title="Close after reading or writing.">close</a>();
<a name="l00058"></a>00058 <span class="keywordflow">if</span> ( d->autoDeleteFilterBase )
<a name="l00059"></a>00059 <span class="keyword">delete</span> filter;
<a name="l00060"></a>00060 <span class="keyword">delete</span> d;
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="preprocessor">#ifndef KDE_NO_COMPAT</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="comment">//this one is static</span>
<a name="l00065"></a>00065 <span class="comment">// Cumbersome API. To be removed in KDE 3.0.</span>
<a name="l00066"></a><a class="code" href="classKFilterDev.html#a47815748f45b3b46c0ced7cc53bfae2e">00066</a> <a class="codeRef" href="qiodevice.html">QIODevice</a>* <a class="code" href="classKFilterDev.html#a47815748f45b3b46c0ced7cc53bfae2e" title="Call this to create the appropriate filter device for base working on file .">KFilterDev::createFilterDevice</a>(<a class="code" href="classKFilterBase.html" title="This is the base class for compression filters such as gzip and bzip2.">KFilterBase</a>* base, <a class="codeRef" href="qfile.html">QFile</a>* file)
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 <span class="keywordflow">if</span> (file==0)
<a name="l00069"></a>00069 <span class="keywordflow">return</span> 0;
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="comment">//we don't need a filter</span>
<a name="l00072"></a>00072 <span class="keywordflow">if</span> (base==0)
<a name="l00073"></a>00073 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="codeRef" href="qfile.html">QFile</a>(file-><a class="codeRef" href="qfile.html#name">name</a>()); <span class="comment">// A bit strange IMHO. We ask for a QFile but we create another one !?! (DF)</span>
<a name="l00074"></a>00074
<a name="l00075"></a>00075 base-><a class="code" href="classKFilterBase.html#ae0b5719aa1ebe3b43507f45828acfb31" title="Sets the device on which the filter will work.">setDevice</a>(file);
<a name="l00076"></a>00076 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classKFilterDev.html#aab24827abc4d813c222af3a4fc46fe91" title="Constructs a KFilterDev for a given filter (e.g.">KFilterDev</a>(base);
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078 <span class="preprocessor">#endif</span>
<a name="l00079"></a>00079 <span class="preprocessor"></span>
<a name="l00080"></a>00080 <span class="comment">//static</span>
<a name="l00081"></a><a class="code" href="classKFilterDev.html#aafd470e4fde55cd53995b7167506fc09">00081</a> <a class="codeRef" href="qiodevice.html">QIODevice</a> * <a class="code" href="classKFilterDev.html#aafd470e4fde55cd53995b7167506fc09" title="Creates an i/o device that is able to read from fileName, whether it's compressed or not...">KFilterDev::deviceForFile</a>( <span class="keyword">const</span> <a class="codeRef" href="qstring.html">QString</a> & fileName, <span class="keyword">const</span> <a class="codeRef" href="qstring.html">QString</a> & mimetype,
<a name="l00082"></a>00082 <span class="keywordtype">bool</span> forceFilter )
<a name="l00083"></a>00083 {
<a name="l00084"></a>00084 <a class="codeRef" href="qfile.html">QFile</a> * f = <span class="keyword">new</span> <a class="codeRef" href="qfile.html">QFile</a>( fileName );
<a name="l00085"></a>00085 <a class="code" href="classKFilterBase.html" title="This is the base class for compression filters such as gzip and bzip2.">KFilterBase</a> * base = mimetype.<a class="codeRef" href="qstring.html#isEmpty">isEmpty</a>() ? <a class="code" href="classKFilterBase.html#a8fca04b12ed998aa9dc76204b55db25a" title="Call this to create the appropriate filter for the file named fileName.">KFilterBase::findFilterByFileName</a>( fileName )
<a name="l00086"></a>00086 : <a class="code" href="classKFilterBase.html#a6f6597b919c0c87339a0312657a64a88" title="Call this to create the appropriate filter for the mimetype mimeType.">KFilterBase::findFilterByMimeType</a>( mimetype );
<a name="l00087"></a>00087 <span class="keywordflow">if</span> ( base )
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 base-><a class="code" href="classKFilterBase.html#ae0b5719aa1ebe3b43507f45828acfb31" title="Sets the device on which the filter will work.">setDevice</a>(f, <span class="keyword">true</span>);
<a name="l00090"></a>00090 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classKFilterDev.html#aab24827abc4d813c222af3a4fc46fe91" title="Constructs a KFilterDev for a given filter (e.g.">KFilterDev</a>(base, <span class="keyword">true</span>);
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092 <span class="keywordflow">if</span>(!forceFilter)
<a name="l00093"></a>00093 <span class="keywordflow">return</span> f;
<a name="l00094"></a>00094 <span class="keywordflow">else</span>
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 <span class="keyword">delete</span> f;
<a name="l00097"></a>00097 <span class="keywordflow">return</span> 0L;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a><a class="code" href="classKFilterDev.html#a68d6bab5c60b94f2b08dabfbd7c17cf8">00101</a> <a class="codeRef" href="qiodevice.html">QIODevice</a> * <a class="code" href="classKFilterDev.html#a68d6bab5c60b94f2b08dabfbd7c17cf8" title="Creates an i/o device that is able to read from the QIODevice inDevice, whether the data is compresse...">KFilterDev::device</a>( <a class="codeRef" href="qiodevice.html">QIODevice</a>* inDevice, <span class="keyword">const</span> <a class="codeRef" href="qstring.html">QString</a> & mimetype)
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 <span class="keywordflow">return</span> <a class="code" href="classKFilterDev.html#a68d6bab5c60b94f2b08dabfbd7c17cf8" title="Creates an i/o device that is able to read from the QIODevice inDevice, whether the data is compresse...">device</a>( inDevice, mimetype, <span class="keyword">true</span> );
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00106"></a><a class="code" href="classKFilterDev.html#aa295958f50deb549674b80104722458e">00106</a> <a class="codeRef" href="qiodevice.html">QIODevice</a> * <a class="code" href="classKFilterDev.html#a68d6bab5c60b94f2b08dabfbd7c17cf8" title="Creates an i/o device that is able to read from the QIODevice inDevice, whether the data is compresse...">KFilterDev::device</a>( <a class="codeRef" href="qiodevice.html">QIODevice</a>* inDevice, <span class="keyword">const</span> <a class="codeRef" href="qstring.html">QString</a> & mimetype, <span class="keywordtype">bool</span> autoDeleteInDevice )
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (inDevice==0)
<a name="l00109"></a>00109 <span class="keywordflow">return</span> 0;
<a name="l00110"></a>00110 <a class="code" href="classKFilterBase.html" title="This is the base class for compression filters such as gzip and bzip2.">KFilterBase</a> * base = <a class="code" href="classKFilterBase.html#a6f6597b919c0c87339a0312657a64a88" title="Call this to create the appropriate filter for the mimetype mimeType.">KFilterBase::findFilterByMimeType</a>(mimetype);
<a name="l00111"></a>00111 <span class="keywordflow">if</span> ( base )
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113 base-><a class="code" href="classKFilterBase.html#ae0b5719aa1ebe3b43507f45828acfb31" title="Sets the device on which the filter will work.">setDevice</a>(inDevice, autoDeleteInDevice);
<a name="l00114"></a>00114 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classKFilterDev.html#aab24827abc4d813c222af3a4fc46fe91" title="Constructs a KFilterDev for a given filter (e.g.">KFilterDev</a>(base, <span class="keyword">true</span> <span class="comment">/* auto-delete "base" */</span>);
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116 <span class="keywordflow">return</span> 0;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118
<a name="l00119"></a><a class="code" href="classKFilterDev.html#a76477d8188e2c503596085563592b268">00119</a> <span class="keywordtype">bool</span> <a class="code" href="classKFilterDev.html#a76477d8188e2c503596085563592b268" title="Open for reading or writing.">KFilterDev::open</a>( <span class="keywordtype">int</span> mode )
<a name="l00120"></a>00120 {
<a name="l00121"></a>00121 <span class="comment">//kdDebug(7005) << "KFilterDev::open " << mode << endl;</span>
<a name="l00122"></a>00122 <span class="keywordflow">if</span> ( mode == IO_ReadOnly )
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 d->buffer.resize(0);
<a name="l00125"></a>00125 d->ungetchBuffer.resize(0);
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 <span class="keywordflow">else</span>
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 d->buffer.resize( BUFFER_SIZE );
<a name="l00130"></a>00130 filter->setOutBuffer( d->buffer.data(), d->buffer.size() );
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132 d->bNeedHeader = !d->bSkipHeaders;
<a name="l00133"></a>00133 filter->init( mode );
<a name="l00134"></a>00134 d->bOpenedUnderlyingDevice = !filter-><a class="code" href="classKFilterBase.html#af1fd3c777945555ec77ec6a74eb1d418" title="Returns the device on which the filter will work.">device</a>()-><a class="codeRef" href="qiodevice.html#isOpen">isOpen</a>();
<a name="l00135"></a>00135 <span class="keywordtype">bool</span> ret = d->bOpenedUnderlyingDevice ? filter-><a class="code" href="classKFilterBase.html#af1fd3c777945555ec77ec6a74eb1d418" title="Returns the device on which the filter will work.">device</a>()-><a class="codeRef" href="qiodevice.html#open">open</a>( mode ) : <span class="keyword">true</span>;
<a name="l00136"></a>00136 d->result = KFilterBase::OK;
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="keywordflow">if</span> ( !ret )
<a name="l00139"></a>00139 kdWarning(7005) << <span class="stringliteral">"KFilterDev::open: Couldn't open underlying device"</span> << endl;
<a name="l00140"></a>00140 <span class="keywordflow">else</span>
<a name="l00141"></a>00141 {
<a name="l00142"></a>00142 <a class="codeRef" href="qiodevice.html#setState">setState</a>( IO_Open );
<a name="l00143"></a>00143 <a class="codeRef" href="qiodevice.html#setMode">setMode</a>( mode );
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145 ioIndex = 0;
<a name="l00146"></a>00146 <span class="keywordflow">return</span> ret;
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148
<a name="l00149"></a><a class="code" href="classKFilterDev.html#aa1400ff3a0888e986cd677f5f4f8f59a">00149</a> <span class="keywordtype">void</span> <a class="code" href="classKFilterDev.html#aa1400ff3a0888e986cd677f5f4f8f59a" title="Close after reading or writing.">KFilterDev::close</a>()
<a name="l00150"></a>00150 {
<a name="l00151"></a>00151 <span class="keywordflow">if</span> ( !<a class="codeRef" href="qiodevice.html#isOpen">isOpen</a>() )
<a name="l00152"></a>00152 <span class="keywordflow">return</span>;
<a name="l00153"></a>00153 <span class="comment">//kdDebug(7005) << "KFilterDev::close" << endl;</span>
<a name="l00154"></a>00154 <span class="keywordflow">if</span> ( filter->mode() == IO_WriteOnly )
<a name="l00155"></a>00155 writeBlock( 0L, 0 ); <span class="comment">// finish writing</span>
<a name="l00156"></a>00156 <span class="comment">//kdDebug(7005) << "KFilterDev::close. Calling terminate()." << endl;</span>
<a name="l00157"></a>00157
<a name="l00158"></a>00158 filter->terminate();
<a name="l00159"></a>00159 <span class="keywordflow">if</span> ( d->bOpenedUnderlyingDevice )
<a name="l00160"></a>00160 filter-><a class="code" href="classKFilterBase.html#af1fd3c777945555ec77ec6a74eb1d418" title="Returns the device on which the filter will work.">device</a>()-><a class="codeRef" href="qiodevice.html#close">close</a>();
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <a class="codeRef" href="qiodevice.html#setState">setState</a>( 0 ); <span class="comment">// not IO_Open</span>
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="keywordtype">void</span> KFilterDev::flush()
<a name="l00166"></a>00166 {
<a name="l00167"></a>00167 <span class="comment">//kdDebug(7005) << "KFilterDev::flush" << endl;</span>
<a name="l00168"></a>00168 filter-><a class="code" href="classKFilterBase.html#af1fd3c777945555ec77ec6a74eb1d418" title="Returns the device on which the filter will work.">device</a>()-><a class="codeRef" href="qiodevice.html#flush">flush</a>();
<a name="l00169"></a>00169 <span class="comment">// Hmm, might not be enough...</span>
<a name="l00170"></a>00170 }
<a name="l00171"></a>00171
<a name="l00172"></a>00172 <a class="codeRef" href="qiodevice.html#Offset">QIODevice::Offset</a> KFilterDev::size()<span class="keyword"> const</span>
<a name="l00173"></a>00173 <span class="keyword"></span>{
<a name="l00174"></a>00174 <span class="comment">// Well, hmm, Houston, we have a problem.</span>
<a name="l00175"></a>00175 <span class="comment">// We can't know the size of the uncompressed data</span>
<a name="l00176"></a>00176 <span class="comment">// before uncompressing it.......</span>
<a name="l00177"></a>00177
<a name="l00178"></a>00178 <span class="comment">// But readAll, which is not virtual, needs the size.........</span>
<a name="l00179"></a>00179
<a name="l00180"></a>00180 kdWarning(7005) << <span class="stringliteral">"KFilterDev::size - can't be implemented !!!!!!!! Returning -1 "</span> << endl;
<a name="l00181"></a>00181 <span class="comment">//abort();</span>
<a name="l00182"></a>00182 <span class="keywordflow">return</span> (uint)-1;
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00185"></a>00185 <a class="codeRef" href="qiodevice.html#Offset">QIODevice::Offset</a> KFilterDev::at()<span class="keyword"> const</span>
<a name="l00186"></a>00186 <span class="keyword"></span>{
<a name="l00187"></a>00187 <span class="keywordflow">return</span> ioIndex;
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189
<a name="l00190"></a><a class="code" href="classKFilterDev.html#ac89bb389d5cdd11cab148e041b4ebcd8">00190</a> <span class="keywordtype">bool</span> KFilterDev::at( <a class="codeRef" href="qiodevice.html#Offset">QIODevice::Offset</a> pos )
<a name="l00191"></a>00191 {
<a name="l00192"></a>00192 <span class="comment">//kdDebug(7005) << "KFilterDev::at " << pos << " currently at " << ioIndex << endl;</span>
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keywordflow">if</span> ( ioIndex == pos )
<a name="l00195"></a>00195 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00196"></a>00196
<a name="l00197"></a>00197 Q_ASSERT ( filter->mode() == IO_ReadOnly );
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <span class="keywordflow">if</span> ( pos == 0 )
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201 ioIndex = 0;
<a name="l00202"></a>00202 <span class="comment">// We can forget about the cached data</span>
<a name="l00203"></a>00203 d->ungetchBuffer.resize(0);
<a name="l00204"></a>00204 d->bNeedHeader = !d->bSkipHeaders;
<a name="l00205"></a>00205 d->result = KFilterBase::OK;
<a name="l00206"></a>00206 filter->setInBuffer(0L,0);
<a name="l00207"></a>00207 filter->reset();
<a name="l00208"></a>00208 <span class="keywordflow">return</span> filter-><a class="code" href="classKFilterBase.html#af1fd3c777945555ec77ec6a74eb1d418" title="Returns the device on which the filter will work.">device</a>()-><a class="codeRef" href="qiodevice.html#reset">reset</a>();
<a name="l00209"></a>00209 }
<a name="l00210"></a>00210
<a name="l00211"></a>00211 <span class="keywordflow">if</span> ( ioIndex < pos ) <span class="comment">// we can start from here</span>
<a name="l00212"></a>00212 pos = pos - ioIndex;
<a name="l00213"></a>00213 <span class="keywordflow">else</span>
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <span class="comment">// we have to start from 0 ! Ugly and slow, but better than the previous</span>
<a name="l00216"></a>00216 <span class="comment">// solution (KTarGz was allocating everything into memory)</span>
<a name="l00217"></a>00217 <span class="keywordflow">if</span> (!at(0)) <span class="comment">// sets ioIndex to 0</span>
<a name="l00218"></a>00218 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00219"></a>00219 }
<a name="l00220"></a>00220
<a name="l00221"></a>00221 <span class="comment">//kdDebug(7005) << "KFilterDev::at : reading " << pos << " dummy bytes" << endl;</span>
<a name="l00222"></a>00222 <a class="codeRef" href="qbytearray.html">QByteArray</a> dummy( QMIN( pos, 3*BUFFER_SIZE ) );
<a name="l00223"></a>00223 d->bIgnoreData = <span class="keyword">true</span>;
<a name="l00224"></a>00224 <span class="keywordtype">bool</span> result = ( (<a class="codeRef" href="qiodevice.html#Offset">QIODevice::Offset</a>)readBlock( dummy.data(), pos ) == pos );
<a name="l00225"></a>00225 d->bIgnoreData = <span class="keyword">false</span>;
<a name="l00226"></a>00226 <span class="keywordflow">return</span> result;
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228
<a name="l00229"></a>00229 <span class="keywordtype">bool</span> KFilterDev::atEnd()<span class="keyword"> const</span>
<a name="l00230"></a>00230 <span class="keyword"></span>{
<a name="l00231"></a>00231 <span class="keywordflow">return</span> filter-><a class="code" href="classKFilterBase.html#af1fd3c777945555ec77ec6a74eb1d418" title="Returns the device on which the filter will work.">device</a>()-><a class="codeRef" href="qiodevice.html#atEnd">atEnd</a>() && (d->result == KFilterBase::END)
<a name="l00232"></a>00232 && d->ungetchBuffer.isEmpty();
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235 Q_LONG KFilterDev::readBlock( <span class="keywordtype">char</span> *data, Q_ULONG maxlen )
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237 Q_ASSERT ( filter->mode() == IO_ReadOnly );
<a name="l00238"></a>00238 <span class="comment">//kdDebug(7005) << "KFilterDev::readBlock maxlen=" << maxlen << endl;</span>
<a name="l00239"></a>00239
<a name="l00240"></a>00240 uint dataReceived = 0;
<a name="l00241"></a>00241 <span class="keywordflow">if</span> ( !d->ungetchBuffer.isEmpty() )
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243 uint len = d->ungetchBuffer.length();
<a name="l00244"></a>00244 <span class="keywordflow">if</span> ( !d->bIgnoreData )
<a name="l00245"></a>00245 {
<a name="l00246"></a>00246 <span class="keywordflow">while</span> ( ( dataReceived < len ) && ( dataReceived < maxlen ) )
<a name="l00247"></a>00247 {
<a name="l00248"></a>00248 *data = d->ungetchBuffer[ len - dataReceived - 1 ];
<a name="l00249"></a>00249 data++;
<a name="l00250"></a>00250 dataReceived++;
<a name="l00251"></a>00251 }
<a name="l00252"></a>00252 }
<a name="l00253"></a>00253 <span class="keywordflow">else</span>
<a name="l00254"></a>00254 {
<a name="l00255"></a>00255 dataReceived = QMIN( len, maxlen );
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257 d->ungetchBuffer.truncate( len - dataReceived );
<a name="l00258"></a>00258 ioIndex += dataReceived;
<a name="l00259"></a>00259 }
<a name="l00260"></a>00260
<a name="l00261"></a>00261 <span class="comment">// If we came to the end of the stream</span>
<a name="l00262"></a>00262 <span class="comment">// return what we got from the ungetchBuffer.</span>
<a name="l00263"></a>00263 <span class="keywordflow">if</span> ( d->result == KFilterBase::END )
<a name="l00264"></a>00264 <span class="keywordflow">return</span> dataReceived;
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="comment">// If we had an error, return -1.</span>
<a name="l00267"></a>00267 <span class="keywordflow">if</span> ( d->result != KFilterBase::OK )
<a name="l00268"></a>00268 <span class="keywordflow">return</span> -1;
<a name="l00269"></a>00269
<a name="l00270"></a>00270
<a name="l00271"></a>00271 Q_ULONG outBufferSize;
<a name="l00272"></a>00272 <span class="keywordflow">if</span> ( d->bIgnoreData )
<a name="l00273"></a>00273 {
<a name="l00274"></a>00274 outBufferSize = QMIN( maxlen, 3*BUFFER_SIZE );
<a name="l00275"></a>00275 }
<a name="l00276"></a>00276 <span class="keywordflow">else</span>
<a name="l00277"></a>00277 {
<a name="l00278"></a>00278 outBufferSize = maxlen;
<a name="l00279"></a>00279 }
<a name="l00280"></a>00280 outBufferSize -= dataReceived;
<a name="l00281"></a>00281 Q_ULONG availOut = outBufferSize;
<a name="l00282"></a>00282 filter->setOutBuffer( data, outBufferSize );
<a name="l00283"></a>00283
<a name="l00284"></a>00284 <span class="keywordtype">bool</span> decompressedAll = <span class="keyword">false</span>;
<a name="l00285"></a>00285 <span class="keywordflow">while</span> ( dataReceived < maxlen )
<a name="l00286"></a>00286 {
<a name="l00287"></a>00287 <span class="keywordflow">if</span> (filter->inBufferEmpty())
<a name="l00288"></a>00288 {
<a name="l00289"></a>00289 <span class="comment">// Not sure about the best size to set there.</span>
<a name="l00290"></a>00290 <span class="comment">// For sure, it should be bigger than the header size (see comment in readHeader)</span>
<a name="l00291"></a>00291 d->buffer.resize( BUFFER_SIZE );
<a name="l00292"></a>00292 <span class="comment">// Request data from underlying device</span>
<a name="l00293"></a>00293 <span class="keywordtype">int</span> size = filter-><a class="code" href="classKFilterBase.html#af1fd3c777945555ec77ec6a74eb1d418" title="Returns the device on which the filter will work.">device</a>()-><a class="codeRef" href="qiodevice.html#readBlock">readBlock</a>( d->buffer.data(),
<a name="l00294"></a>00294 d->buffer.size() );
<a name="l00295"></a>00295 <span class="keywordflow">if</span> ( size )
<a name="l00296"></a>00296 filter->setInBuffer( d->buffer.data(), size );
<a name="l00297"></a>00297 <span class="keywordflow">else</span> {
<a name="l00298"></a>00298 <span class="keywordflow">if</span> ( decompressedAll )
<a name="l00299"></a>00299 {
<a name="l00300"></a>00300 <span class="comment">// We decoded everything there was to decode. So -> done.</span>
<a name="l00301"></a>00301 <span class="comment">//kdDebug(7005) << "Seems we're done. dataReceived=" << dataReceived << endl;</span>
<a name="l00302"></a>00302 d->result = KFilterBase::END;
<a name="l00303"></a>00303 <span class="keywordflow">break</span>;
<a name="l00304"></a>00304 }
<a name="l00305"></a>00305 }
<a name="l00306"></a>00306 <span class="comment">//kdDebug(7005) << "KFilterDev::readBlock got " << size << " bytes from device" << endl;</span>
<a name="l00307"></a>00307 }
<a name="l00308"></a>00308 <span class="keywordflow">if</span> (d->bNeedHeader)
<a name="l00309"></a>00309 {
<a name="l00310"></a>00310 (void) filter->readHeader();
<a name="l00311"></a>00311 d->bNeedHeader = <span class="keyword">false</span>;
<a name="l00312"></a>00312 }
<a name="l00313"></a>00313
<a name="l00314"></a>00314 d->result = filter->uncompress();
<a name="l00315"></a>00315
<a name="l00316"></a>00316 <span class="keywordflow">if</span> (d->result == KFilterBase::ERROR)
<a name="l00317"></a>00317 {
<a name="l00318"></a>00318 kdWarning(7005) << <span class="stringliteral">"KFilterDev: Error when uncompressing data"</span> << endl;
<a name="l00319"></a>00319 <span class="keywordflow">break</span>;
<a name="l00320"></a>00320 }
<a name="l00321"></a>00321
<a name="l00322"></a>00322 <span class="comment">// We got that much data since the last time we went here</span>
<a name="l00323"></a>00323 uint outReceived = availOut - filter->outBufferAvailable();
<a name="l00324"></a>00324 <span class="comment">//kdDebug(7005) << "avail_out = " << filter->outBufferAvailable() << " result=" << d->result << " outReceived=" << outReceived << endl;</span>
<a name="l00325"></a>00325 <span class="keywordflow">if</span>( availOut < (uint)filter->outBufferAvailable() )
<a name="l00326"></a>00326 kdWarning(7005) << <span class="stringliteral">" last availOut "</span> << availOut << <span class="stringliteral">" smaller than new avail_out="</span> << filter->outBufferAvailable() << <span class="stringliteral">" !"</span> << endl;
<a name="l00327"></a>00327
<a name="l00328"></a>00328 dataReceived += outReceived;
<a name="l00329"></a>00329 <span class="keywordflow">if</span> ( !d->bIgnoreData ) <span class="comment">// Move on in the output buffer</span>
<a name="l00330"></a>00330 {
<a name="l00331"></a>00331 data += outReceived;
<a name="l00332"></a>00332 availOut = maxlen - dataReceived;
<a name="l00333"></a>00333 }
<a name="l00334"></a>00334 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( maxlen - dataReceived < outBufferSize )
<a name="l00335"></a>00335 {
<a name="l00336"></a>00336 availOut = maxlen - dataReceived;
<a name="l00337"></a>00337 }
<a name="l00338"></a>00338 ioIndex += outReceived;
<a name="l00339"></a>00339 <span class="keywordflow">if</span> (d->result == KFilterBase::END)
<a name="l00340"></a>00340 {
<a name="l00341"></a>00341 <span class="comment">//kdDebug(7005) << "KFilterDev::readBlock got END. dataReceived=" << dataReceived << endl;</span>
<a name="l00342"></a>00342 <span class="keywordflow">break</span>; <span class="comment">// Finished.</span>
<a name="l00343"></a>00343 }
<a name="l00344"></a>00344 <span class="keywordflow">if</span> (filter->inBufferEmpty() && filter->outBufferAvailable() != 0 )
<a name="l00345"></a>00345 {
<a name="l00346"></a>00346 decompressedAll = <span class="keyword">true</span>;
<a name="l00347"></a>00347 }
<a name="l00348"></a>00348 filter->setOutBuffer( data, availOut );
<a name="l00349"></a>00349 }
<a name="l00350"></a>00350
<a name="l00351"></a>00351 <span class="keywordflow">return</span> dataReceived;
<a name="l00352"></a>00352 }
<a name="l00353"></a>00353
<a name="l00354"></a>00354 Q_LONG KFilterDev::writeBlock( <span class="keyword">const</span> <span class="keywordtype">char</span> *data <span class="comment">/*0 to finish*/</span>, Q_ULONG len )
<a name="l00355"></a>00355 {
<a name="l00356"></a>00356 Q_ASSERT ( filter->mode() == IO_WriteOnly );
<a name="l00357"></a>00357 <span class="comment">// If we had an error, return 0.</span>
<a name="l00358"></a>00358 <span class="keywordflow">if</span> ( d->result != KFilterBase::OK )
<a name="l00359"></a>00359 <span class="keywordflow">return</span> 0;
<a name="l00360"></a>00360
<a name="l00361"></a>00361 <span class="keywordtype">bool</span> finish = (data == 0L);
<a name="l00362"></a>00362 <span class="keywordflow">if</span> (!finish)
<a name="l00363"></a>00363 {
<a name="l00364"></a>00364 filter->setInBuffer( data, len );
<a name="l00365"></a>00365 <span class="keywordflow">if</span> (d->bNeedHeader)
<a name="l00366"></a>00366 {
<a name="l00367"></a>00367 (void)filter->writeHeader( d->origFileName );
<a name="l00368"></a>00368 d->bNeedHeader = <span class="keyword">false</span>;
<a name="l00369"></a>00369 }
<a name="l00370"></a>00370 }
<a name="l00371"></a>00371
<a name="l00372"></a>00372 uint dataWritten = 0;
<a name="l00373"></a>00373 uint availIn = len;
<a name="l00374"></a>00374 <span class="keywordflow">while</span> ( dataWritten < len || finish )
<a name="l00375"></a>00375 {
<a name="l00376"></a>00376
<a name="l00377"></a>00377 d->result = filter->compress( finish );
<a name="l00378"></a>00378
<a name="l00379"></a>00379 <span class="keywordflow">if</span> (d->result == KFilterBase::ERROR)
<a name="l00380"></a>00380 {
<a name="l00381"></a>00381 kdWarning(7005) << <span class="stringliteral">"KFilterDev: Error when compressing data"</span> << endl;
<a name="l00382"></a>00382 <span class="comment">// What to do ?</span>
<a name="l00383"></a>00383 <span class="keywordflow">break</span>;
<a name="l00384"></a>00384 }
<a name="l00385"></a>00385
<a name="l00386"></a>00386 <span class="comment">// Wrote everything ?</span>
<a name="l00387"></a>00387 <span class="keywordflow">if</span> (filter->inBufferEmpty() || (d->result == KFilterBase::END))
<a name="l00388"></a>00388 {
<a name="l00389"></a>00389 <span class="comment">// We got that much data since the last time we went here</span>
<a name="l00390"></a>00390 uint wrote = availIn - filter->inBufferAvailable();
<a name="l00391"></a>00391
<a name="l00392"></a>00392 <span class="comment">//kdDebug(7005) << " Wrote everything for now. avail_in = " << filter->inBufferAvailable() << " result=" << d->result << " wrote=" << wrote << endl;</span>
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="comment">// Move on in the input buffer</span>
<a name="l00395"></a>00395 data += wrote;
<a name="l00396"></a>00396 dataWritten += wrote;
<a name="l00397"></a>00397 ioIndex += wrote;
<a name="l00398"></a>00398
<a name="l00399"></a>00399 availIn = len - dataWritten;
<a name="l00400"></a>00400 <span class="comment">//kdDebug(7005) << " KFilterDev::writeBlock availIn=" << availIn << " dataWritten=" << dataWritten << " ioIndex=" << ioIndex << endl;</span>
<a name="l00401"></a>00401 <span class="keywordflow">if</span> ( availIn > 0 ) <span class="comment">// Not sure this will ever happen</span>
<a name="l00402"></a>00402 filter->setInBuffer( data, availIn );
<a name="l00403"></a>00403 }
<a name="l00404"></a>00404
<a name="l00405"></a>00405 <span class="keywordflow">if</span> (filter->outBufferFull() || (d->result == KFilterBase::END))
<a name="l00406"></a>00406 {
<a name="l00407"></a>00407 <span class="comment">//kdDebug(7005) << " KFilterDev::writeBlock writing to underlying. avail_out=" << filter->outBufferAvailable() << endl;</span>
<a name="l00408"></a>00408 <span class="keywordtype">int</span> towrite = d->buffer.size() - filter->outBufferAvailable();
<a name="l00409"></a>00409 <span class="keywordflow">if</span> ( towrite > 0 )
<a name="l00410"></a>00410 {
<a name="l00411"></a>00411 <span class="comment">// Write compressed data to underlying device</span>
<a name="l00412"></a>00412 <span class="keywordtype">int</span> size = filter-><a class="code" href="classKFilterBase.html#af1fd3c777945555ec77ec6a74eb1d418" title="Returns the device on which the filter will work.">device</a>()-><a class="codeRef" href="qiodevice.html#writeBlock">writeBlock</a>( d->buffer.data(), towrite );
<a name="l00413"></a>00413 <span class="keywordflow">if</span> ( size != towrite ) {
<a name="l00414"></a>00414 kdWarning(7005) << <span class="stringliteral">"KFilterDev::writeBlock. Could only write "</span> << size << <span class="stringliteral">" out of "</span> << towrite << <span class="stringliteral">" bytes"</span> << endl;
<a name="l00415"></a>00415 <span class="keywordflow">return</span> 0; <span class="comment">// indicate an error (happens on disk full)</span>
<a name="l00416"></a>00416 }
<a name="l00417"></a>00417 <span class="comment">//else</span>
<a name="l00418"></a>00418 <span class="comment">//kdDebug(7005) << " KFilterDev::writeBlock wrote " << size << " bytes" << endl;</span>
<a name="l00419"></a>00419 }
<a name="l00420"></a>00420 d->buffer.resize( 8*1024 );
<a name="l00421"></a>00421 filter->setOutBuffer( d->buffer.data(), d->buffer.size() );
<a name="l00422"></a>00422 <span class="keywordflow">if</span> (d->result == KFilterBase::END)
<a name="l00423"></a>00423 {
<a name="l00424"></a>00424 <span class="comment">//kdDebug(7005) << " KFilterDev::writeBlock END" << endl;</span>
<a name="l00425"></a>00425 Q_ASSERT(finish); <span class="comment">// hopefully we don't get end before finishing</span>
<a name="l00426"></a>00426 <span class="keywordflow">break</span>;
<a name="l00427"></a>00427 }
<a name="l00428"></a>00428 }
<a name="l00429"></a>00429 }
<a name="l00430"></a>00430
<a name="l00431"></a>00431 <span class="keywordflow">return</span> dataWritten;
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433
<a name="l00434"></a>00434 <span class="keywordtype">int</span> KFilterDev::getch()
<a name="l00435"></a>00435 {
<a name="l00436"></a>00436 Q_ASSERT ( filter->mode() == IO_ReadOnly );
<a name="l00437"></a>00437 <span class="comment">//kdDebug(7005) << "KFilterDev::getch" << endl;</span>
<a name="l00438"></a>00438 <span class="keywordflow">if</span> ( !d->ungetchBuffer.isEmpty() ) {
<a name="l00439"></a>00439 <span class="keywordtype">int</span> len = d->ungetchBuffer.length();
<a name="l00440"></a>00440 <span class="keywordtype">int</span> ch = d->ungetchBuffer[ len-1 ];
<a name="l00441"></a>00441 d->ungetchBuffer.truncate( len - 1 );
<a name="l00442"></a>00442 ioIndex++;
<a name="l00443"></a>00443 <span class="comment">//kdDebug(7005) << "KFilterDev::getch from ungetch: " << QString(QChar(ch)) << endl;</span>
<a name="l00444"></a>00444 <span class="keywordflow">return</span> ch;
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446 <span class="keywordtype">char</span> buf[1];
<a name="l00447"></a>00447 <span class="keywordtype">int</span> ret = readBlock( buf, 1 ) == 1 ? buf[0] : EOF;
<a name="l00448"></a>00448 <span class="comment">//kdDebug(7005) << "KFilterDev::getch ret=" << QString(QChar(ret)) << endl;</span>
<a name="l00449"></a>00449 <span class="keywordflow">return</span> ret;
<a name="l00450"></a>00450 }
<a name="l00451"></a>00451
<a name="l00452"></a>00452 <span class="keywordtype">int</span> KFilterDev::putch( <span class="keywordtype">int</span> c )
<a name="l00453"></a>00453 {
<a name="l00454"></a>00454 <span class="comment">//kdDebug(7005) << "KFilterDev::putch" << endl;</span>
<a name="l00455"></a>00455 <span class="keywordtype">char</span> buf[1];
<a name="l00456"></a>00456 buf[0] = c;
<a name="l00457"></a>00457 <span class="keywordflow">return</span> writeBlock( buf, 1 ) == 1 ? c : -1;
<a name="l00458"></a>00458 }
<a name="l00459"></a>00459
<a name="l00460"></a>00460 <span class="keywordtype">int</span> KFilterDev::ungetch( <span class="keywordtype">int</span> ch )
<a name="l00461"></a>00461 {
<a name="l00462"></a>00462 <span class="comment">//kdDebug(7005) << "KFilterDev::ungetch " << QString(QChar(ch)) << endl;</span>
<a name="l00463"></a>00463 <span class="keywordflow">if</span> ( ch == EOF ) <span class="comment">// cannot unget EOF</span>
<a name="l00464"></a>00464 <span class="keywordflow">return</span> ch;
<a name="l00465"></a>00465
<a name="l00466"></a>00466 <span class="comment">// pipe or similar => we cannot ungetch, so do it manually</span>
<a name="l00467"></a>00467 d->ungetchBuffer +=ch;
<a name="l00468"></a>00468 ioIndex--;
<a name="l00469"></a>00469 <span class="keywordflow">return</span> ch;
<a name="l00470"></a>00470 }
<a name="l00471"></a>00471
<a name="l00472"></a><a class="code" href="classKFilterDev.html#ac48b10dd86024843e29b1ae263d4a457">00472</a> <span class="keywordtype">void</span> <a class="code" href="classKFilterDev.html#ac48b10dd86024843e29b1ae263d4a457" title="For writing gzip compressed files only: set the name of the original file, to be used in the gzip hea...">KFilterDev::setOrigFileName</a>( <span class="keyword">const</span> <a class="codeRef" href="qcstring.html">QCString</a> & fileName )
<a name="l00473"></a>00473 {
<a name="l00474"></a>00474 d->origFileName = fileName;
<a name="l00475"></a>00475 }
<a name="l00476"></a>00476
<a name="l00477"></a><a class="code" href="classKFilterDev.html#ad4d43dc1c8ceae1159723b624cc4f4f3">00477</a> <span class="keywordtype">void</span> <a class="code" href="classKFilterDev.html#ad4d43dc1c8ceae1159723b624cc4f4f3" title="Call this let this device skip the gzip headers when reading/writing.">KFilterDev::setSkipHeaders</a>()
<a name="l00478"></a>00478 {
<a name="l00479"></a>00479 d->bSkipHeaders = <span class="keyword">true</span>;
<a name="l00480"></a>00480 }
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