1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* config-loader-libxml.c libxml2 XML loader
4 * Copyright (C) 2003 Red Hat, Inc.
6 * Licensed under the Academic Free License version 2.1
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "config-parser.h"
25 #include <dbus/dbus-internals.h>
26 #include <libxml/xmlreader.h>
27 #include <libxml/parser.h>
28 #include <libxml/globals.h>
29 #include <libxml/xmlmemory.h>
35 /* About the error handling:
36 * - setup a "structured" error handler that catches structural
37 * errors and some oom errors
38 * - assume that a libxml function returning an error code means
41 #define _DBUS_MAYBE_SET_OOM(e) (dbus_error_is_set(e) ? (void)0 : _DBUS_SET_OOM(e))
45 xml_text_start_element (BusConfigParser *parser,
46 xmlTextReader *reader,
51 const char **attribute_names, **attribute_values;
53 int i, status, is_empty;
55 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
58 attribute_names = NULL;
59 attribute_values = NULL;
61 name = xmlTextReaderConstName (reader);
62 n_attributes = xmlTextReaderAttributeCount (reader);
63 is_empty = xmlTextReaderIsEmptyElement (reader);
65 if (name == NULL || n_attributes < 0 || is_empty == -1)
67 _DBUS_MAYBE_SET_OOM (error);
71 attribute_names = dbus_new0 (const char *, n_attributes + 1);
72 attribute_values = dbus_new0 (const char *, n_attributes + 1);
73 if (attribute_names == NULL || attribute_values == NULL)
75 _DBUS_SET_OOM (error);
79 while ((status = xmlTextReaderMoveToNextAttribute (reader)) == 1)
81 _dbus_assert (i < n_attributes);
82 attribute_names[i] = xmlTextReaderConstName (reader);
83 attribute_values[i] = xmlTextReaderConstValue (reader);
84 if (attribute_names[i] == NULL || attribute_values[i] == NULL)
86 _DBUS_MAYBE_SET_OOM (error);
93 _DBUS_MAYBE_SET_OOM (error);
96 _dbus_assert (i == n_attributes);
98 ret = bus_config_parser_start_element (parser, name,
99 attribute_names, attribute_values,
101 if (ret && is_empty == 1)
102 ret = bus_config_parser_end_element (parser, name, error);
105 dbus_free (attribute_names);
106 dbus_free (attribute_values);
111 static void xml_shut_up (void *ctx, const char *msg, ...)
117 xml_text_reader_error (void *arg, xmlErrorPtr xml_error)
119 DBusError *error = arg;
122 _dbus_verbose ("XML_ERROR level=%d, domain=%d, code=%d, msg=%s\n",
123 xml_error->level, xml_error->domain,
124 xml_error->code, xml_error->message);
127 if (!dbus_error_is_set (error))
129 if (xml_error->code == XML_ERR_NO_MEMORY)
130 _DBUS_SET_OOM (error);
131 else if (xml_error->level == XML_ERR_ERROR ||
132 xml_error->level == XML_ERR_FATAL)
133 dbus_set_error (error, DBUS_ERROR_FAILED,
134 "Error loading config file: '%s'",
141 bus_config_load (const DBusString *file,
142 dbus_bool_t is_toplevel,
143 const BusConfigParser *parent,
147 xmlTextReader *reader;
148 BusConfigParser *parser;
149 DBusString dirname, data;
153 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
158 if (!_dbus_string_init (&dirname))
160 _DBUS_SET_OOM (error);
164 if (!_dbus_string_init (&data))
166 _DBUS_SET_OOM (error);
167 _dbus_string_free (&dirname);
173 /* xmlMemSetup only fails if one of the functions is NULL */
174 xmlMemSetup (dbus_free,
179 xmlSetGenericErrorFunc (NULL, xml_shut_up);
182 if (!_dbus_string_get_dirname (file, &dirname))
184 _DBUS_SET_OOM (error);
188 parser = bus_config_parser_new (&dirname, is_toplevel, parent);
191 _DBUS_SET_OOM (error);
195 if (!_dbus_file_get_contents (&data, file, error))
198 reader = xmlReaderForMemory (_dbus_string_get_const_data (&data),
199 _dbus_string_get_length (&data),
203 _DBUS_SET_OOM (error);
207 xmlTextReaderSetParserProp (reader, XML_PARSER_SUBST_ENTITIES, 1);
209 dbus_error_init (&tmp_error);
210 xmlTextReaderSetStructuredErrorHandler (reader, xml_text_reader_error, &tmp_error);
212 while ((ret = xmlTextReaderRead (reader)) == 1)
216 if (dbus_error_is_set (&tmp_error))
219 type = xmlTextReaderNodeType (reader);
222 _DBUS_MAYBE_SET_OOM (&tmp_error);
226 switch ((xmlReaderTypes) type) {
227 case XML_READER_TYPE_ELEMENT:
228 xml_text_start_element (parser, reader, &tmp_error);
231 case XML_READER_TYPE_TEXT:
232 case XML_READER_TYPE_CDATA:
236 value = xmlTextReaderConstValue (reader);
239 _dbus_string_init_const (&content, value);
240 bus_config_parser_content (parser, &content, &tmp_error);
243 _DBUS_MAYBE_SET_OOM (&tmp_error);
247 case XML_READER_TYPE_DOCUMENT_TYPE:
250 name = xmlTextReaderConstName (reader);
252 bus_config_parser_check_doctype (parser, name, &tmp_error);
254 _DBUS_MAYBE_SET_OOM (&tmp_error);
258 case XML_READER_TYPE_END_ELEMENT:
261 name = xmlTextReaderConstName (reader);
263 bus_config_parser_end_element (parser, name, &tmp_error);
265 _DBUS_MAYBE_SET_OOM (&tmp_error);
269 case XML_READER_TYPE_DOCUMENT:
270 case XML_READER_TYPE_DOCUMENT_FRAGMENT:
271 case XML_READER_TYPE_PROCESSING_INSTRUCTION:
272 case XML_READER_TYPE_COMMENT:
273 case XML_READER_TYPE_ENTITY:
274 case XML_READER_TYPE_NOTATION:
275 case XML_READER_TYPE_WHITESPACE:
276 case XML_READER_TYPE_SIGNIFICANT_WHITESPACE:
277 case XML_READER_TYPE_END_ENTITY:
278 case XML_READER_TYPE_XML_DECLARATION:
279 /* nothing to do, just read on */
282 case XML_READER_TYPE_NONE:
283 case XML_READER_TYPE_ATTRIBUTE:
284 case XML_READER_TYPE_ENTITY_REFERENCE:
285 _dbus_assert_not_reached ("unexpected nodes in XML");
288 if (dbus_error_is_set (&tmp_error))
293 _DBUS_MAYBE_SET_OOM (&tmp_error);
296 xmlFreeTextReader (reader);
298 if (dbus_error_is_set (&tmp_error))
300 dbus_move_error (&tmp_error, error);
304 if (!bus_config_parser_finished (parser, error))
306 _dbus_string_free (&dirname);
307 _dbus_string_free (&data);
310 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
314 _DBUS_ASSERT_ERROR_IS_SET (error);
315 _dbus_string_free (&dirname);
316 _dbus_string_free (&data);
320 bus_config_parser_unref (parser);
321 _dbus_assert (reader == NULL); /* must go to reader_out first */