1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* config-loader-libxml.c libxml2 XML loader
4 * Copyright (C) 2003 Red Hat, Inc.
6 * Licensed under the Academic Free License version 2.0
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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>
33 /* About the error handling:
34 * - setup a "structured" error handler that catches structural
35 * errors and some oom errors
36 * - assume that a libxml function returning an error code means
39 #define _DBUS_MAYBE_SET_OOM(e) (dbus_error_is_set(e) ? (void)0 : _DBUS_SET_OOM(e))
43 xml_text_start_element (BusConfigParser *parser,
44 xmlTextReader *reader,
49 const char **attribute_names, **attribute_values;
51 int i, status, is_empty;
53 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
56 attribute_names = NULL;
57 attribute_values = NULL;
59 name = xmlTextReaderConstName (reader);
60 n_attributes = xmlTextReaderAttributeCount (reader);
61 is_empty = xmlTextReaderIsEmptyElement (reader);
63 if (name == NULL || n_attributes < 0 || is_empty == -1)
65 _DBUS_MAYBE_SET_OOM (error);
69 attribute_names = dbus_new0 (const char *, n_attributes + 1);
70 attribute_values = dbus_new0 (const char *, n_attributes + 1);
71 if (attribute_names == NULL || attribute_values == NULL)
73 _DBUS_SET_OOM (error);
77 while ((status = xmlTextReaderMoveToNextAttribute (reader)) == 1)
79 _dbus_assert (i < n_attributes);
80 attribute_names[i] = xmlTextReaderConstName (reader);
81 attribute_values[i] = xmlTextReaderConstValue (reader);
82 if (attribute_names[i] == NULL || attribute_values[i] == NULL)
84 _DBUS_MAYBE_SET_OOM (error);
91 _DBUS_MAYBE_SET_OOM (error);
94 _dbus_assert (i == n_attributes);
96 ret = bus_config_parser_start_element (parser, name,
97 attribute_names, attribute_values,
99 if (ret && is_empty == 1)
100 ret = bus_config_parser_end_element (parser, name, error);
103 dbus_free (attribute_names);
104 dbus_free (attribute_values);
109 static void xml_shut_up (void *ctx, const char *msg, ...)
115 xml_text_reader_error (void *arg, xmlErrorPtr xml_error)
117 DBusError *error = arg;
120 _dbus_verbose ("XML_ERROR level=%d, domain=%d, code=%d, msg=%s\n",
121 xml_error->level, xml_error->domain,
122 xml_error->code, xml_error->message);
125 if (!dbus_error_is_set (error) &&
126 (xml_error->level == XML_ERR_ERROR ||
127 xml_error->level == XML_ERR_FATAL))
129 if (xml_error->code != XML_ERR_NO_MEMORY)
130 _DBUS_SET_OOM (error);
132 dbus_set_error (error, DBUS_ERROR_FAILED,
133 "Error loading config file: '%s'",
140 bus_config_load (const DBusString *file,
141 dbus_bool_t is_toplevel,
142 const BusConfigParser *parent,
146 xmlTextReader *reader;
147 BusConfigParser *parser;
148 DBusString dirname, data;
149 const char *data_str;
153 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
160 /* xmlMemSetup only fails if one of the functions is NULL */
161 xmlMemSetup (dbus_free,
166 xmlSetGenericErrorFunc (NULL, xml_shut_up);
169 if (!_dbus_string_init (&dirname))
171 _DBUS_SET_OOM (error);
175 if (!_dbus_string_init (&data))
177 _DBUS_SET_OOM (error);
178 _dbus_string_free (&dirname);
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 data_str = _dbus_string_get_const_data (&data);
200 reader = xmlReaderForMemory (data_str, _dbus_string_get_length (&data),
204 _DBUS_SET_OOM (error);
208 xmlTextReaderSetParserProp (reader, XML_PARSER_SUBST_ENTITIES, 1);
210 dbus_error_init (&tmp_error);
211 xmlTextReaderSetStructuredErrorHandler (reader, xml_text_reader_error, &tmp_error);
213 while ((ret = xmlTextReaderRead (reader)) == 1)
217 if (dbus_error_is_set (&tmp_error))
220 type = xmlTextReaderNodeType (reader);
223 _DBUS_MAYBE_SET_OOM (&tmp_error);
227 switch ((xmlReaderTypes) type) {
228 case XML_READER_TYPE_ELEMENT:
229 xml_text_start_element (parser, reader, &tmp_error);
232 case XML_READER_TYPE_TEXT:
233 case XML_READER_TYPE_CDATA:
237 value = xmlTextReaderConstValue (reader);
240 _dbus_string_init_const (&content, value);
241 bus_config_parser_content (parser, &content, &tmp_error);
244 _DBUS_MAYBE_SET_OOM (&tmp_error);
248 case XML_READER_TYPE_DOCUMENT_TYPE:
251 name = xmlTextReaderConstName (reader);
253 bus_config_parser_check_doctype (parser, name, &tmp_error);
255 _DBUS_MAYBE_SET_OOM (&tmp_error);
259 case XML_READER_TYPE_END_ELEMENT:
262 name = xmlTextReaderConstName (reader);
264 bus_config_parser_end_element (parser, name, &tmp_error);
266 _DBUS_MAYBE_SET_OOM (&tmp_error);
270 case XML_READER_TYPE_DOCUMENT:
271 case XML_READER_TYPE_DOCUMENT_FRAGMENT:
272 case XML_READER_TYPE_PROCESSING_INSTRUCTION:
273 case XML_READER_TYPE_COMMENT:
274 case XML_READER_TYPE_ENTITY:
275 case XML_READER_TYPE_NOTATION:
276 case XML_READER_TYPE_WHITESPACE:
277 case XML_READER_TYPE_SIGNIFICANT_WHITESPACE:
278 case XML_READER_TYPE_END_ENTITY:
279 case XML_READER_TYPE_XML_DECLARATION:
280 /* nothing to do, just read on */
283 case XML_READER_TYPE_NONE:
284 case XML_READER_TYPE_ATTRIBUTE:
285 case XML_READER_TYPE_ENTITY_REFERENCE:
286 _dbus_assert_not_reached ("unexpected nodes in XML");
289 if (dbus_error_is_set (&tmp_error))
294 _DBUS_MAYBE_SET_OOM (&tmp_error);
297 xmlFreeTextReader (reader);
301 if (dbus_error_is_set (&tmp_error))
303 dbus_move_error (&tmp_error, error);
307 if (!bus_config_parser_finished (parser, error))
309 _dbus_string_free (&dirname);
310 _dbus_string_free (&data);
311 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
315 _DBUS_ASSERT_ERROR_IS_SET (error);
316 _dbus_string_free (&dirname);
317 _dbus_string_free (&data);
319 bus_config_parser_unref (parser);
320 _dbus_assert (reader == NULL); /* must go to reader_out first */