Sophie: lib64dbus-1_3-devel-0.92-6mdv2007.0 x86

lib64dbus-1_3-devel-0.92-6mdv2007.0.x86_64.rpm

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<hr><h1>config-loader-expat.c</h1><div class="fragment"><pre>00001 <font class="comment">/* -*- mode: C; c-file-style: "gnu" -*- */</font>
00002 <font class="comment">/* config-loader-expat.c  expat XML loader</font>
00003 <font class="comment"> *</font>
00004 <font class="comment"> * Copyright (C) 2003 Red Hat, Inc.</font>
00005 <font class="comment"> *</font>
00006 <font class="comment"> * Licensed under the Academic Free License version 1.2</font>
00007 <font class="comment"> *</font>
00008 <font class="comment"> * This program is free software; you can redistribute it and/or modify</font>
00009 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00010 <font class="comment"> * the Free Software Foundation; either version 2 of the License, or</font>
00011 <font class="comment"> * (at your option) any later version.</font>
00012 <font class="comment"> *</font>
00013 <font class="comment"> * This program is distributed in the hope that it will be useful,</font>
00014 <font class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00015 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</font>
00016 <font class="comment"> * GNU General Public License for more details.</font>
00017 <font class="comment"> *</font>
00018 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00019 <font class="comment"> * along with this program; if not, write to the Free Software</font>
00020 <font class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA</font>
00021 <font class="comment"> *</font>
00022 <font class="comment"> */</font>
00023 
00024 <font class="preprocessor">#include "config-parser.h"</font>
00025 <font class="preprocessor">#include &lt;dbus/dbus-internals.h&gt;</font>
00026 <font class="preprocessor">#include &lt;expat.h&gt;</font>
00027 
00028 <font class="keyword">static</font> XML_Memory_Handling_Suite memsuite =
00029 {
00030   dbus_malloc,
00031   dbus_realloc,
00032   dbus_free
00033 };
00034 
<a name="l00035"></a><a class="code" href="structExpatParseContext.html">00035</a> <font class="keyword">typedef</font> <font class="keyword">struct</font>
00036 <font class="keyword"></font>{
00037   <a class="code" href="structBusConfigParser.html">BusConfigParser</a> *parser;
00038   <font class="keyword">const</font> <font class="keywordtype">char</font> *filename;
00039   <a class="code" href="structDBusString.html">DBusString</a> content;
00040   <a class="code" href="structDBusError.html">DBusError</a> *error;
00041   dbus_bool_t failed;
00042 } <a class="code" href="structExpatParseContext.html">ExpatParseContext</a>;
00043 
00044 <font class="keyword">static</font> dbus_bool_t
00045 process_content (<a class="code" href="structExpatParseContext.html">ExpatParseContext</a> *context)
00046 {
00047   <font class="keywordflow">if</font> (context-&gt;<a class="code" href="structExpatParseContext.html#m4">failed</a>)
00048     <font class="keywordflow">return</font> FALSE;
00049 
00050   <font class="keywordflow">if</font> (_dbus_string_get_length (&amp;context-&gt;<a class="code" href="structExpatParseContext.html#m2">content</a>) &gt; 0)
00051     {
00052       <font class="keywordflow">if</font> (!bus_config_parser_content (context-&gt;<a class="code" href="structExpatParseContext.html#m0">parser</a>,
00053                                       &amp;context-&gt;<a class="code" href="structExpatParseContext.html#m2">content</a>,
00054                                       context-&gt;<a class="code" href="structExpatParseContext.html#m3">error</a>))
00055         {
00056           context-&gt;<a class="code" href="structExpatParseContext.html#m4">failed</a> = TRUE;
00057           <font class="keywordflow">return</font> FALSE;
00058         }
00059       _dbus_string_set_length (&amp;context-&gt;<a class="code" href="structExpatParseContext.html#m2">content</a>, 0);
00060     }
00061 
00062   <font class="keywordflow">return</font> TRUE;
00063 }
00064 
00065 <font class="keyword">static</font> <font class="keywordtype">void</font>
00066 expat_StartElementHandler (<font class="keywordtype">void</font>            *userData,
00067                            <font class="keyword">const</font> XML_Char  *name,
00068                            <font class="keyword">const</font> XML_Char **atts)
00069 {
00070   <a class="code" href="structExpatParseContext.html">ExpatParseContext</a> *context = userData;
00071   <font class="keywordtype">int</font> i;
00072   <font class="keywordtype">char</font> **names;
00073   <font class="keywordtype">char</font> **values;
00074 
00075   <font class="comment">/* Expat seems to suck and can't abort the parse if we</font>
00076 <font class="comment">   * throw an error. Expat 2.0 is supposed to fix this.</font>
00077 <font class="comment">   */</font>
00078   <font class="keywordflow">if</font> (context-&gt;<a class="code" href="structExpatParseContext.html#m4">failed</a>)
00079     <font class="keywordflow">return</font>;
00080 
00081   <font class="keywordflow">if</font> (!process_content (context))
00082     <font class="keywordflow">return</font>;
00083 
00084   <font class="comment">/* "atts" is key, value, key, value, NULL */</font>
00085   <font class="keywordflow">for</font> (i = 0; atts[i] != NULL; ++i)
00086     ; <font class="comment">/* nothing */</font>
00087 
00088   _dbus_assert (i % 2 == 0);
00089   names = dbus_new0 (<font class="keywordtype">char</font> *, i / 2 + 1);
00090   values = dbus_new0 (<font class="keywordtype">char</font> *, i / 2 + 1);
00091 
00092   <font class="keywordflow">if</font> (names == NULL || values == NULL)
00093     {
00094       dbus_set_error (context-&gt;<a class="code" href="structExpatParseContext.html#m3">error</a>, DBUS_ERROR_NO_MEMORY, NULL);
00095       context-&gt;<a class="code" href="structExpatParseContext.html#m4">failed</a> = TRUE;
00096       dbus_free (names);
00097       dbus_free (values);
00098       <font class="keywordflow">return</font>;
00099     }
00100 
00101   i = 0;
00102   <font class="keywordflow">while</font> (atts[i] != NULL)
00103     {
00104       _dbus_assert (i % 2 == 0);
00105       names [i / 2] = (<font class="keywordtype">char</font>*) atts[i];
00106       values[i / 2] = (<font class="keywordtype">char</font>*) atts[i+1];
00107 
00108       i += 2;
00109     }
00110 
00111   <font class="keywordflow">if</font> (!bus_config_parser_start_element (context-&gt;<a class="code" href="structExpatParseContext.html#m0">parser</a>,
00112                                         name,
00113                                         (<font class="keyword">const</font> <font class="keywordtype">char</font> **) names,
00114                                         (<font class="keyword">const</font> <font class="keywordtype">char</font> **) values,
00115                                         context-&gt;<a class="code" href="structExpatParseContext.html#m3">error</a>))
00116     {
00117       dbus_free (names);
00118       dbus_free (values);
00119       context-&gt;<a class="code" href="structExpatParseContext.html#m4">failed</a> = TRUE;
00120       <font class="keywordflow">return</font>;
00121     }
00122 
00123   dbus_free (names);
00124   dbus_free (values);
00125 }
00126 
00127 <font class="keyword">static</font> <font class="keywordtype">void</font>
00128 expat_EndElementHandler (<font class="keywordtype">void</font>           *userData,
00129                          <font class="keyword">const</font> XML_Char *name)
00130 {
00131   <a class="code" href="structExpatParseContext.html">ExpatParseContext</a> *context = userData;
00132 
00133   <font class="keywordflow">if</font> (!process_content (context))
00134     <font class="keywordflow">return</font>;
00135 
00136   <font class="keywordflow">if</font> (!bus_config_parser_end_element (context-&gt;<a class="code" href="structExpatParseContext.html#m0">parser</a>,
00137                                       name,
00138                                       context-&gt;<a class="code" href="structExpatParseContext.html#m3">error</a>))
00139     {
00140       context-&gt;<a class="code" href="structExpatParseContext.html#m4">failed</a> = TRUE;
00141       <font class="keywordflow">return</font>;
00142     }
00143 }
00144 
00145 <font class="comment">/* s is not 0 terminated. */</font>
00146 <font class="keyword">static</font> <font class="keywordtype">void</font>
00147 expat_CharacterDataHandler (<font class="keywordtype">void</font>           *userData,
00148                             <font class="keyword">const</font> XML_Char *s,
00149                             <font class="keywordtype">int</font>             len)
00150 {
00151   <a class="code" href="structExpatParseContext.html">ExpatParseContext</a> *context = userData;
00152   <font class="keywordflow">if</font> (context-&gt;<a class="code" href="structExpatParseContext.html#m4">failed</a>)
00153     <font class="keywordflow">return</font>;
00154 
00155   <font class="keywordflow">if</font> (!_dbus_string_append_len (&amp;context-&gt;<a class="code" href="structExpatParseContext.html#m2">content</a>,
00156                                 s, len))
00157     {
00158       dbus_set_error (context-&gt;<a class="code" href="structExpatParseContext.html#m3">error</a>, DBUS_ERROR_NO_MEMORY, NULL);
00159       context-&gt;<a class="code" href="structExpatParseContext.html#m4">failed</a> = TRUE;
00160       <font class="keywordflow">return</font>;
00161     }
00162 }
00163 
00164 
00165 <a class="code" href="structBusConfigParser.html">BusConfigParser</a>*
00166 bus_config_load (<font class="keyword">const</font> <a class="code" href="structDBusString.html">DBusString</a> *file,
00167                  dbus_bool_t       is_toplevel,
00168                  <a class="code" href="structDBusError.html">DBusError</a>        *error)
00169 {
00170   XML_Parser expat;
00171   <font class="keyword">const</font> <font class="keywordtype">char</font> *filename;
00172   <a class="code" href="structBusConfigParser.html">BusConfigParser</a> *parser;
00173   <a class="code" href="structExpatParseContext.html">ExpatParseContext</a> context;
00174   <a class="code" href="structDBusString.html">DBusString</a> dirname;
00175   
00176   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
00177 
00178   parser = NULL;
00179   expat = NULL;
00180   context.<a class="code" href="structExpatParseContext.html#m3">error</a> = error;
00181   context.<a class="code" href="structExpatParseContext.html#m4">failed</a> = FALSE;
00182 
00183   filename = _dbus_string_get_const_data (file);
00184 
00185   <font class="keywordflow">if</font> (!_dbus_string_init (&amp;context.<a class="code" href="structExpatParseContext.html#m2">content</a>))
00186     {
00187       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00188       <font class="keywordflow">return</font> NULL;
00189     }
00190 
00191   <font class="keywordflow">if</font> (!_dbus_string_init (&amp;dirname))
00192     {
00193       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00194       _dbus_string_free (&amp;context.<a class="code" href="structExpatParseContext.html#m2">content</a>);
00195       <font class="keywordflow">return</font> NULL;
00196     }
00197   
00198   expat = XML_ParserCreate_MM (<font class="stringliteral">"UTF-8"</font>, &amp;memsuite, NULL);
00199   <font class="keywordflow">if</font> (expat == NULL)
00200     {
00201       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00202       <font class="keywordflow">goto</font> failed;
00203     }
00204 
00205   <font class="keywordflow">if</font> (!_dbus_string_get_dirname (file, &amp;dirname))
00206     {
00207       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00208       <font class="keywordflow">goto</font> failed;
00209     }
00210   
00211   parser = bus_config_parser_new (&amp;dirname, is_toplevel);
00212   <font class="keywordflow">if</font> (parser == NULL)
00213     {
00214       dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00215       <font class="keywordflow">goto</font> failed;
00216     }
00217   context.<a class="code" href="structExpatParseContext.html#m0">parser</a> = parser;
00218 
00219   XML_SetUserData (expat, &amp;context);
00220   XML_SetElementHandler (expat,
00221                          expat_StartElementHandler,
00222                          expat_EndElementHandler);
00223   XML_SetCharacterDataHandler (expat,
00224                                expat_CharacterDataHandler);
00225 
00226   {
00227     <a class="code" href="structDBusString.html">DBusString</a> data;
00228     <font class="keyword">const</font> <font class="keywordtype">char</font> *data_str;
00229 
00230     <font class="keywordflow">if</font> (!_dbus_string_init (&amp;data))
00231       {
00232         dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00233         <font class="keywordflow">goto</font> failed;
00234       }
00235 
00236     <font class="keywordflow">if</font> (!_dbus_file_get_contents (&amp;data, file, error))
00237       {
00238         _dbus_string_free (&amp;data);
00239         <font class="keywordflow">goto</font> failed;
00240       }
00241 
00242     data_str = _dbus_string_get_const_data (&amp;data);
00243 
00244     <font class="keywordflow">if</font> (!XML_Parse (expat, data_str, _dbus_string_get_length (&amp;data), TRUE))
00245       {
00246         <font class="keywordflow">if</font> (context.<a class="code" href="structExpatParseContext.html#m3">error</a> != NULL &amp;&amp;
00247             !dbus_error_is_set (context.<a class="code" href="structExpatParseContext.html#m3">error</a>))
00248           {
00249             <font class="keyword">enum</font> XML_Error e;
00250 
00251             e = XML_GetErrorCode (expat);
00252             <font class="keywordflow">if</font> (e == XML_ERROR_NO_MEMORY)
00253               dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
00254             <font class="keywordflow">else</font>
00255               dbus_set_error (error, DBUS_ERROR_FAILED,
00256                               <font class="stringliteral">"Error in file %s, line %d, column %d: %s\n"</font>,
00257                               filename,
00258                               XML_GetCurrentLineNumber (expat),
00259                               XML_GetCurrentColumnNumber (expat),
00260                               XML_ErrorString (e));
00261           }
00262 
00263         _dbus_string_free (&amp;data);
00264         <font class="keywordflow">goto</font> failed;
00265       }
00266 
00267     _dbus_string_free (&amp;data);
00268 
00269     <font class="keywordflow">if</font> (context.<a class="code" href="structExpatParseContext.html#m4">failed</a>)
00270       <font class="keywordflow">goto</font> failed;
00271   }
00272 
00273   <font class="keywordflow">if</font> (!bus_config_parser_finished (parser, error))
00274     <font class="keywordflow">goto</font> failed;
00275 
00276   _dbus_string_free (&amp;dirname);
00277   _dbus_string_free (&amp;context.<a class="code" href="structExpatParseContext.html#m2">content</a>);
00278   XML_ParserFree (expat);
00279 
00280   _DBUS_ASSERT_ERROR_IS_CLEAR (error);
00281   <font class="keywordflow">return</font> parser;
00282 
00283  failed:
00284   _DBUS_ASSERT_ERROR_IS_SET (error);
00285 
00286   _dbus_string_free (&amp;dirname);
00287   _dbus_string_free (&amp;context.<a class="code" href="structExpatParseContext.html#m2">content</a>);
00288   <font class="keywordflow">if</font> (expat)
00289     XML_ParserFree (expat);
00290   <font class="keywordflow">if</font> (parser)
00291     bus_config_parser_unref (parser);
00292   <font class="keywordflow">return</font> NULL;
00293 }
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