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<hr><h1>dbus-gloader-expat.c</h1><div class="fragment"><pre>00001 <font class="comment">/* -*- mode: C; c-file-style: "gnu" -*- */</font>
00002 <font class="comment">/* dbus-gloader-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 2.0</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 "dbus-gparser.h"</font>
00025 <font class="preprocessor">#include <expat.h></font>
00026
00027 <font class="keyword">static</font> <font class="keywordtype">void</font>*
00028 expat_g_malloc (size_t sz)
00029 {
00030 <font class="keywordflow">return</font> g_malloc (sz);
00031 }
00032
00033 <font class="keyword">static</font> <font class="keywordtype">void</font>*
00034 expat_g_realloc (<font class="keywordtype">void</font> *mem, size_t sz)
00035 {
00036 <font class="keywordflow">return</font> g_realloc (mem, sz);
00037 }
00038
00039 <font class="keyword">static</font> XML_Memory_Handling_Suite memsuite =
00040 {
00041 expat_g_malloc,
00042 expat_g_realloc,
00043 g_free
00044 };
00045
<a name="l00049"></a><a class="code" href="structExpatParseContext.html">00049</a> <font class="keyword">typedef</font> <font class="keyword">struct</font>
00050 <font class="keyword"></font>{
<a name="l00051"></a><a class="code" href="structExpatParseContext.html#m0">00051</a> Parser *parser;
<a name="l00052"></a><a class="code" href="structExpatParseContext.html#m1">00052</a> <font class="keyword">const</font> <font class="keywordtype">char</font> *filename;
<a name="l00053"></a><a class="code" href="structExpatParseContext.html#m2">00053</a> GString *content;
<a name="l00054"></a><a class="code" href="structExpatParseContext.html#m3">00054</a> GError **error;
<a name="l00055"></a><a class="code" href="structExpatParseContext.html#m4">00055</a> gboolean failed;
00056 } <a class="code" href="structExpatParseContext.html">ExpatParseContext</a>;
00057
00058 <font class="keyword">static</font> dbus_bool_t
00059 process_content (<a class="code" href="structExpatParseContext.html">ExpatParseContext</a> *context)
00060 {
00061 <font class="keywordflow">if</font> (context-><a class="code" href="structExpatParseContext.html#m4">failed</a>)
00062 <font class="keywordflow">return</font> FALSE;
00063
00064 <font class="keywordflow">if</font> (context-><a class="code" href="structExpatParseContext.html#m2">content</a>->len > 0)
00065 {
00066 <font class="keywordflow">if</font> (!parser_content (context-><a class="code" href="structExpatParseContext.html#m0">parser</a>,
00067 context-><a class="code" href="structExpatParseContext.html#m2">content</a>->str,
00068 context-><a class="code" href="structExpatParseContext.html#m2">content</a>->len,
00069 context-><a class="code" href="structExpatParseContext.html#m3">error</a>))
00070 {
00071 context-><a class="code" href="structExpatParseContext.html#m4">failed</a> = TRUE;
00072 <font class="keywordflow">return</font> FALSE;
00073 }
00074 g_string_set_size (context-><a class="code" href="structExpatParseContext.html#m2">content</a>, 0);
00075 }
00076
00077 <font class="keywordflow">return</font> TRUE;
00078 }
00079
00080 <font class="keyword">static</font> <font class="keywordtype">void</font>
00081 expat_StartElementHandler (<font class="keywordtype">void</font> *userData,
00082 <font class="keyword">const</font> XML_Char *name,
00083 <font class="keyword">const</font> XML_Char **atts)
00084 {
00085 <a class="code" href="structExpatParseContext.html">ExpatParseContext</a> *context = userData;
00086 <font class="keywordtype">int</font> i;
00087 <font class="keywordtype">char</font> **names;
00088 <font class="keywordtype">char</font> **values;
00089
00090 <font class="comment">/* Expat seems to suck and can't abort the parse if we</font>
00091 <font class="comment"> * throw an error. Expat 2.0 is supposed to fix this.</font>
00092 <font class="comment"> */</font>
00093 <font class="keywordflow">if</font> (context-><a class="code" href="structExpatParseContext.html#m4">failed</a>)
00094 <font class="keywordflow">return</font>;
00095
00096 <font class="keywordflow">if</font> (!process_content (context))
00097 <font class="keywordflow">return</font>;
00098
00099 <font class="comment">/* "atts" is key, value, key, value, NULL */</font>
00100 <font class="keywordflow">for</font> (i = 0; atts[i] != NULL; ++i)
00101 ; <font class="comment">/* nothing */</font>
00102
00103 g_assert (i % 2 == 0);
00104 names = g_new0 (<font class="keywordtype">char</font> *, i / 2 + 1);
00105 values = g_new0 (<font class="keywordtype">char</font> *, i / 2 + 1);
00106
00107 i = 0;
00108 <font class="keywordflow">while</font> (atts[i] != NULL)
00109 {
00110 g_assert (i % 2 == 0);
00111 names [i / 2] = (<font class="keywordtype">char</font>*) atts[i];
00112 values[i / 2] = (<font class="keywordtype">char</font>*) atts[i+1];
00113
00114 i += 2;
00115 }
00116
00117 <font class="keywordflow">if</font> (!parser_start_element (context-><a class="code" href="structExpatParseContext.html#m0">parser</a>,
00118 name,
00119 (<font class="keyword">const</font> <font class="keywordtype">char</font> **) names,
00120 (<font class="keyword">const</font> <font class="keywordtype">char</font> **) values,
00121 context-><a class="code" href="structExpatParseContext.html#m3">error</a>))
00122 {
00123 g_free (names);
00124 g_free (values);
00125 context-><a class="code" href="structExpatParseContext.html#m4">failed</a> = TRUE;
00126 <font class="keywordflow">return</font>;
00127 }
00128
00129 g_free (names);
00130 g_free (values);
00131 }
00132
00133 <font class="keyword">static</font> <font class="keywordtype">void</font>
00134 expat_EndElementHandler (<font class="keywordtype">void</font> *userData,
00135 <font class="keyword">const</font> XML_Char *name)
00136 {
00137 <a class="code" href="structExpatParseContext.html">ExpatParseContext</a> *context = userData;
00138
00139 <font class="keywordflow">if</font> (!process_content (context))
00140 <font class="keywordflow">return</font>;
00141
00142 <font class="keywordflow">if</font> (!parser_end_element (context-><a class="code" href="structExpatParseContext.html#m0">parser</a>,
00143 name,
00144 context-><a class="code" href="structExpatParseContext.html#m3">error</a>))
00145 {
00146 context-><a class="code" href="structExpatParseContext.html#m4">failed</a> = TRUE;
00147 <font class="keywordflow">return</font>;
00148 }
00149 }
00150
00151 <font class="comment">/* s is not 0 terminated. */</font>
00152 <font class="keyword">static</font> <font class="keywordtype">void</font>
00153 expat_CharacterDataHandler (<font class="keywordtype">void</font> *userData,
00154 <font class="keyword">const</font> XML_Char *s,
00155 <font class="keywordtype">int</font> len)
00156 {
00157 <a class="code" href="structExpatParseContext.html">ExpatParseContext</a> *context = userData;
00158
00159 <font class="keywordflow">if</font> (context-><a class="code" href="structExpatParseContext.html#m4">failed</a>)
00160 <font class="keywordflow">return</font>;
00161
00162 g_string_append_len (context-><a class="code" href="structExpatParseContext.html#m2">content</a>,
00163 s, len);
00164 }
00165
00166 NodeInfo*
00167 description_load_from_file (<font class="keyword">const</font> <font class="keywordtype">char</font> *filename,
00168 GError **error)
00169 {
00170 <font class="keywordtype">char</font> *contents;
00171 gsize len;
00172 NodeInfo *nodes;
00173
00174 contents = NULL;
00175 <font class="keywordflow">if</font> (!g_file_get_contents (filename, &contents, &len, error))
00176 <font class="keywordflow">return</font> NULL;
00177
00178 nodes = description_load_from_string (contents, len, error);
00179 g_free (contents);
00180
00181 <font class="keywordflow">return</font> nodes;
00182 }
00183
00184 NodeInfo*
00185 description_load_from_string (<font class="keyword">const</font> <font class="keywordtype">char</font> *str,
00186 <font class="keywordtype">int</font> len,
00187 GError **error)
00188 {
00189 XML_Parser expat;
00190 <a class="code" href="structExpatParseContext.html">ExpatParseContext</a> context;
00191 NodeInfo *nodes;
00192
00193 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
00194
00195 expat = NULL;
00196 context.<a class="code" href="structExpatParseContext.html#m0">parser</a> = NULL;
00197 context.<a class="code" href="structExpatParseContext.html#m3">error</a> = error;
00198 context.<a class="code" href="structExpatParseContext.html#m4">failed</a> = FALSE;
00199
00200 expat = XML_ParserCreate_MM (<font class="stringliteral">"UTF-8"</font>, &memsuite, NULL);
00201 <font class="keywordflow">if</font> (expat == NULL)
00202 g_error (<font class="stringliteral">"No memory to create XML parser\n"</font>);
00203
00204 context.<a class="code" href="structExpatParseContext.html#m0">parser</a> = parser_new ();
00205 context.<a class="code" href="structExpatParseContext.html#m2">content</a> = g_string_new (NULL);
00206
00207 XML_SetUserData (expat, &context);
00208 XML_SetElementHandler (expat,
00209 expat_StartElementHandler,
00210 expat_EndElementHandler);
00211 XML_SetCharacterDataHandler (expat,
00212 expat_CharacterDataHandler);
00213
00214 <font class="keywordflow">if</font> (!XML_Parse (expat, str, len, TRUE))
00215 {
00216 <font class="keywordflow">if</font> (context.<a class="code" href="structExpatParseContext.html#m3">error</a> != NULL &&
00217 *context.<a class="code" href="structExpatParseContext.html#m3">error</a> == NULL)
00218 {
00219 <font class="keyword">enum</font> XML_Error e;
00220
00221 e = XML_GetErrorCode (expat);
00222 <font class="keywordflow">if</font> (e == XML_ERROR_NO_MEMORY)
00223 g_error (<font class="stringliteral">"Not enough memory to parse XML document"</font>);
00224 <font class="keywordflow">else</font>
00225 g_set_error (error,
00226 G_MARKUP_ERROR,
00227 G_MARKUP_ERROR_PARSE,
00228 <font class="stringliteral">"Error in D-BUS description XML, line %d, column %d: %s\n"</font>,
00229 XML_GetCurrentLineNumber (expat),
00230 XML_GetCurrentColumnNumber (expat),
00231 XML_ErrorString (e));
00232 }
00233
00234 <font class="keywordflow">goto</font> failed;
00235 }
00236
00237 <font class="keywordflow">if</font> (context.<a class="code" href="structExpatParseContext.html#m4">failed</a>)
00238 <font class="keywordflow">goto</font> failed;
00239
00240 <font class="keywordflow">if</font> (!parser_finished (context.<a class="code" href="structExpatParseContext.html#m0">parser</a>, error))
00241 <font class="keywordflow">goto</font> failed;
00242
00243 XML_ParserFree (expat);
00244 g_string_free (context.<a class="code" href="structExpatParseContext.html#m2">content</a>, TRUE);
00245
00246 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
00247 nodes = parser_get_nodes (context.<a class="code" href="structExpatParseContext.html#m0">parser</a>);
00248 node_info_ref (nodes);
00249 parser_unref (context.<a class="code" href="structExpatParseContext.html#m0">parser</a>);
00250 <font class="keywordflow">return</font> nodes;
00251
00252 failed:
00253 g_return_val_if_fail (error == NULL || *error != NULL, NULL);
00254
00255 g_string_free (context.<a class="code" href="structExpatParseContext.html#m2">content</a>, TRUE);
00256 <font class="keywordflow">if</font> (expat)
00257 XML_ParserFree (expat);
00258 <font class="keywordflow">if</font> (context.<a class="code" href="structExpatParseContext.html#m0">parser</a>)
00259 parser_unref (context.<a class="code" href="structExpatParseContext.html#m0">parser</a>);
00260 <font class="keywordflow">return</font> NULL;
00261 }
00262
</pre></div><hr><address align="right"><small>Generated on Wed Jun 9 05:01:25 2004 for D-BUS by
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