1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ofdbus/dbus/bus/config-loader-libxml.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,353 @@
1.4 +/* -*- mode: C; c-file-style: "gnu" -*- */
1.5 +/* config-loader-libxml.c libxml2 XML loader
1.6 + *
1.7 + * Copyright (C) 2003 Red Hat, Inc.
1.8 + * Portion Copyright © 2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
1.9 + * Licensed under the Academic Free License version 2.1
1.10 + *
1.11 + * This program is free software; you can redistribute it and/or modify
1.12 + * it under the terms of the GNU General Public License as published by
1.13 + * the Free Software Foundation; either version 2 of the License, or
1.14 + * (at your option) any later version.
1.15 + *
1.16 + * This program is distributed in the hope that it will be useful,
1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.19 + * GNU General Public License for more details.
1.20 + *
1.21 + * You should have received a copy of the GNU General Public License
1.22 + * along with this program; if not, write to the Free Software
1.23 + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1.24 + *
1.25 + */
1.26 +
1.27 +#include "config-parser.h"
1.28 +#ifndef __SYMBIAN32__
1.29 +#include <dbus/dbus-internals.h>
1.30 +#else
1.31 +#include "dbus-internals.h"
1.32 +#endif //__SYMBIAN32__
1.33 +#ifdef __SYMBIAN32__
1.34 +#include <libxml2_xmlreader.h>
1.35 +
1.36 +#else
1.37 +#include <libxml/xmlreader.h>
1.38 +#include <libxml/parser.h>
1.39 +#include <libxml/globals.h>
1.40 +#include <libxml/xmlmemory.h>
1.41 +#endif
1.42 +#include <errno.h>
1.43 +#include <string.h>
1.44 +
1.45 +/* About the error handling:
1.46 + * - setup a "structured" error handler that catches structural
1.47 + * errors and some oom errors
1.48 + * - assume that a libxml function returning an error code means
1.49 + * out-of-memory
1.50 + */
1.51 +#define _DBUS_MAYBE_SET_OOM(e) (dbus_error_is_set(e) ? (void)0 : _DBUS_SET_OOM(e))
1.52 +
1.53 +
1.54 +static dbus_bool_t
1.55 +xml_text_start_element (BusConfigParser *parser,
1.56 + xmlTextReader *reader,
1.57 + DBusError *error)
1.58 +{
1.59 + const char *name;
1.60 + int n_attributes;
1.61 + const char **attribute_names, **attribute_values;
1.62 + dbus_bool_t ret;
1.63 + int i, status, is_empty;
1.64 +
1.65 + _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1.66 +
1.67 + ret = FALSE;
1.68 + attribute_names = NULL;
1.69 + attribute_values = NULL;
1.70 +
1.71 +#ifdef __SYMBIAN32__
1.72 + name = (const char *) xmlTextReaderConstName (reader);
1.73 +#else
1.74 + name = xmlTextReaderConstName (reader);
1.75 +#endif
1.76 + n_attributes = xmlTextReaderAttributeCount (reader);
1.77 + is_empty = xmlTextReaderIsEmptyElement (reader);
1.78 +
1.79 + if (name == NULL || n_attributes < 0 || is_empty == -1)
1.80 + {
1.81 + _DBUS_MAYBE_SET_OOM (error);
1.82 + goto out;
1.83 + }
1.84 +
1.85 + attribute_names = dbus_new0 (const char *, n_attributes + 1);
1.86 + attribute_values = dbus_new0 (const char *, n_attributes + 1);
1.87 + if (attribute_names == NULL || attribute_values == NULL)
1.88 + {
1.89 + _DBUS_SET_OOM (error);
1.90 + goto out;
1.91 + }
1.92 + i = 0;
1.93 + while ((status = xmlTextReaderMoveToNextAttribute (reader)) == 1)
1.94 + {
1.95 + _dbus_assert (i < n_attributes);
1.96 +#ifdef __SYMBIAN32__
1.97 + attribute_names[i] = (const char *) xmlTextReaderConstName (reader);
1.98 + attribute_values[i] = (const char *) xmlTextReaderConstValue (reader);
1.99 +#else
1.100 + attribute_names[i] = xmlTextReaderConstName (reader);
1.101 + attribute_values[i] = (xmlTextReaderConstValue (reader);
1.102 +#endif
1.103 + if (attribute_names[i] == NULL || attribute_values[i] == NULL)
1.104 + {
1.105 + _DBUS_MAYBE_SET_OOM (error);
1.106 + goto out;
1.107 + }
1.108 + i++;
1.109 + }
1.110 + if (status == -1)
1.111 + {
1.112 + _DBUS_MAYBE_SET_OOM (error);
1.113 + goto out;
1.114 + }
1.115 + _dbus_assert (i == n_attributes);
1.116 +
1.117 + ret = bus_config_parser_start_element (parser, name,
1.118 + attribute_names, attribute_values,
1.119 + error);
1.120 + if (ret && is_empty == 1)
1.121 + ret = bus_config_parser_end_element (parser, name, error);
1.122 +
1.123 + out:
1.124 + dbus_free (attribute_names);
1.125 + dbus_free (attribute_values);
1.126 +
1.127 + return ret;
1.128 +}
1.129 +
1.130 +static void xml_shut_up (void *ctx, const char *msg, ...)
1.131 +{
1.132 + return;
1.133 +}
1.134 +
1.135 +static void
1.136 +xml_text_reader_error (void *arg, xmlErrorPtr xml_error)
1.137 +{
1.138 + DBusError *error = arg;
1.139 +
1.140 +#if 0
1.141 + _dbus_verbose ("XML_ERROR level=%d, domain=%d, code=%d, msg=%s\n",
1.142 + xml_error->level, xml_error->domain,
1.143 + xml_error->code, xml_error->message);
1.144 +#endif
1.145 +
1.146 + if (!dbus_error_is_set (error))
1.147 + {
1.148 + if (xml_error->code == XML_ERR_NO_MEMORY)
1.149 + _DBUS_SET_OOM (error);
1.150 + else if (xml_error->level == XML_ERR_ERROR ||
1.151 + xml_error->level == XML_ERR_FATAL)
1.152 + dbus_set_error (error, DBUS_ERROR_FAILED,
1.153 + "Error loading config file: '%s'",
1.154 + xml_error->message);
1.155 + }
1.156 +}
1.157 +
1.158 +
1.159 +BusConfigParser*
1.160 +bus_config_load (const DBusString *file,
1.161 + dbus_bool_t is_toplevel,
1.162 + const BusConfigParser *parent,
1.163 + DBusError *error)
1.164 +
1.165 +{
1.166 + xmlTextReader *reader;
1.167 + BusConfigParser *parser;
1.168 + DBusString dirname, data;
1.169 + DBusError tmp_error;
1.170 + int ret;
1.171 +
1.172 + _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1.173 +
1.174 + parser = NULL;
1.175 + reader = NULL;
1.176 +
1.177 + if (!_dbus_string_init (&dirname))
1.178 + {
1.179 + _DBUS_SET_OOM (error);
1.180 + return NULL;
1.181 + }
1.182 +
1.183 + if (!_dbus_string_init (&data))
1.184 + {
1.185 + _DBUS_SET_OOM (error);
1.186 + _dbus_string_free (&dirname);
1.187 + return NULL;
1.188 + }
1.189 +
1.190 + if (is_toplevel)
1.191 + {
1.192 + /* xmlMemSetup only fails if one of the functions is NULL */
1.193 + /*
1.194 + xmlMemSetup (dbus_free,
1.195 + dbus_malloc,
1.196 + dbus_realloc,
1.197 + _dbus_strdup);
1.198 + */
1.199 + xmlInitParser ();
1.200 + xmlSetGenericErrorFunc (NULL, xml_shut_up);
1.201 + }
1.202 +
1.203 + if (!_dbus_string_get_dirname (file, &dirname))
1.204 + {
1.205 + _DBUS_SET_OOM (error);
1.206 + goto failed;
1.207 + }
1.208 +
1.209 + parser = bus_config_parser_new (&dirname, is_toplevel, parent);
1.210 + if (parser == NULL)
1.211 + {
1.212 + _DBUS_SET_OOM (error);
1.213 + goto failed;
1.214 + }
1.215 +
1.216 + if (!_dbus_file_get_contents (&data, file, error))
1.217 + goto failed;
1.218 +
1.219 + reader = xmlReaderForMemory (_dbus_string_get_const_data (&data),
1.220 + _dbus_string_get_length (&data),
1.221 + NULL, NULL, 0);
1.222 + if (reader == NULL)
1.223 + {
1.224 + _DBUS_SET_OOM (error);
1.225 + goto failed;
1.226 + }
1.227 +
1.228 + xmlTextReaderSetParserProp (reader, XML_PARSER_SUBST_ENTITIES, 1);
1.229 +
1.230 + dbus_error_init (&tmp_error);
1.231 + xmlTextReaderSetStructuredErrorHandler (reader, xml_text_reader_error, &tmp_error);
1.232 +
1.233 + while ((ret = xmlTextReaderRead (reader)) == 1)
1.234 + {
1.235 + int type;
1.236 +
1.237 + if (dbus_error_is_set (&tmp_error))
1.238 + goto reader_out;
1.239 +
1.240 + type = xmlTextReaderNodeType (reader);
1.241 + if (type == -1)
1.242 + {
1.243 + _DBUS_MAYBE_SET_OOM (&tmp_error);
1.244 + goto reader_out;
1.245 + }
1.246 +
1.247 + switch ((xmlReaderTypes) type) {
1.248 + case XML_READER_TYPE_ELEMENT:
1.249 + xml_text_start_element (parser, reader, &tmp_error);
1.250 + break;
1.251 +
1.252 + case XML_READER_TYPE_TEXT:
1.253 + case XML_READER_TYPE_CDATA:
1.254 + {
1.255 + DBusString content;
1.256 + const char *value;
1.257 +#ifdef __SYMBIAN32__
1.258 + value = (const char *) xmlTextReaderConstValue (reader);
1.259 +#else
1.260 + value = xmlTextReaderConstValue (reader);
1.261 +#endif
1.262 + if (value != NULL)
1.263 + {
1.264 + _dbus_string_init_const (&content, value);
1.265 + bus_config_parser_content (parser, &content, &tmp_error);
1.266 + }
1.267 + else
1.268 + _DBUS_MAYBE_SET_OOM (&tmp_error);
1.269 + break;
1.270 + }
1.271 +
1.272 + case XML_READER_TYPE_DOCUMENT_TYPE:
1.273 + {
1.274 + const char *name;
1.275 +#ifdef __SYMBIAN32__
1.276 + name = (const char *) xmlTextReaderConstName (reader);
1.277 +#else
1.278 + name = xmlTextReaderConstName (reader);
1.279 +#endif
1.280 + if (name != NULL)
1.281 + bus_config_parser_check_doctype (parser, name, &tmp_error);
1.282 + else
1.283 + _DBUS_MAYBE_SET_OOM (&tmp_error);
1.284 + break;
1.285 + }
1.286 +
1.287 + case XML_READER_TYPE_END_ELEMENT:
1.288 + {
1.289 + const char *name;
1.290 +#ifdef __SYMBIAN32__
1.291 + name = (const char *) xmlTextReaderConstName (reader);
1.292 +#else
1.293 + name = xmlTextReaderConstName (reader);
1.294 +#endif
1.295 + if (name != NULL)
1.296 + bus_config_parser_end_element (parser, name, &tmp_error);
1.297 + else
1.298 + _DBUS_MAYBE_SET_OOM (&tmp_error);
1.299 + break;
1.300 + }
1.301 +
1.302 + case XML_READER_TYPE_DOCUMENT:
1.303 + case XML_READER_TYPE_DOCUMENT_FRAGMENT:
1.304 + case XML_READER_TYPE_PROCESSING_INSTRUCTION:
1.305 + case XML_READER_TYPE_COMMENT:
1.306 + case XML_READER_TYPE_ENTITY:
1.307 + case XML_READER_TYPE_NOTATION:
1.308 + case XML_READER_TYPE_WHITESPACE:
1.309 + case XML_READER_TYPE_SIGNIFICANT_WHITESPACE:
1.310 + case XML_READER_TYPE_END_ENTITY:
1.311 + case XML_READER_TYPE_XML_DECLARATION:
1.312 + /* nothing to do, just read on */
1.313 + break;
1.314 +
1.315 + case XML_READER_TYPE_NONE:
1.316 + case XML_READER_TYPE_ATTRIBUTE:
1.317 + case XML_READER_TYPE_ENTITY_REFERENCE:
1.318 + _dbus_assert_not_reached ("unexpected nodes in XML");
1.319 + }
1.320 +
1.321 + if (dbus_error_is_set (&tmp_error))
1.322 + goto reader_out;
1.323 + }
1.324 +
1.325 + if (ret == -1)
1.326 + _DBUS_MAYBE_SET_OOM (&tmp_error);
1.327 +
1.328 + reader_out:
1.329 + xmlFreeTextReader (reader);
1.330 + reader = NULL;
1.331 + if (dbus_error_is_set (&tmp_error))
1.332 + {
1.333 + dbus_move_error (&tmp_error, error);
1.334 + goto failed;
1.335 + }
1.336 +
1.337 + if (!bus_config_parser_finished (parser, error))
1.338 + goto failed;
1.339 + _dbus_string_free (&dirname);
1.340 + _dbus_string_free (&data);
1.341 + if (is_toplevel)
1.342 + xmlCleanupParser();
1.343 + _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1.344 + return parser;
1.345 +
1.346 + failed:
1.347 + _DBUS_ASSERT_ERROR_IS_SET (error);
1.348 + _dbus_string_free (&dirname);
1.349 + _dbus_string_free (&data);
1.350 + if (is_toplevel)
1.351 + xmlCleanupParser();
1.352 + if (parser)
1.353 + bus_config_parser_unref (parser);
1.354 + _dbus_assert (reader == NULL); /* must go to reader_out first */
1.355 + return NULL;
1.356 +}