-/* -*- mode: C; c-file-style: "gnu" -*- */
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* config-loader-libxml.c libxml2 XML loader
*
* Copyright (C) 2003 Red Hat, Inc.
*
- * Licensed under the Academic Free License version 2.0
+ * Licensed under the Academic Free License version 2.1
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
+#include <config.h>
#include "config-parser.h"
#include <dbus/dbus-internals.h>
#include <libxml/xmlreader.h>
#include <libxml/parser.h>
#include <libxml/globals.h>
#include <libxml/xmlmemory.h>
+#ifdef HAVE_ERRNO_H
#include <errno.h>
+#endif
#include <string.h>
-static void*
-libxml_malloc (size_t size)
-{
- return dbus_malloc (size);
-}
+/* About the error handling:
+ * - setup a "structured" error handler that catches structural
+ * errors and some oom errors
+ * - assume that a libxml function returning an error code means
+ * out-of-memory
+ */
+#define _DBUS_MAYBE_SET_OOM(e) (dbus_error_is_set(e) ? (void)0 : _DBUS_SET_OOM(e))
-static void*
-libxml_realloc (void *ptr, size_t size)
-{
- return dbus_realloc (ptr, size);
-}
-static void
-libxml_free (void *ptr)
+static dbus_bool_t
+xml_text_start_element (BusConfigParser *parser,
+ xmlTextReader *reader,
+ DBusError *error)
{
- dbus_free (ptr);
+ const char *name;
+ int n_attributes;
+ const char **attribute_names, **attribute_values;
+ dbus_bool_t ret;
+ int i, status, is_empty;
+
+ _DBUS_ASSERT_ERROR_IS_CLEAR (error);
+
+ ret = FALSE;
+ attribute_names = NULL;
+ attribute_values = NULL;
+
+ name = xmlTextReaderConstName (reader);
+ n_attributes = xmlTextReaderAttributeCount (reader);
+ is_empty = xmlTextReaderIsEmptyElement (reader);
+
+ if (name == NULL || n_attributes < 0 || is_empty == -1)
+ {
+ _DBUS_MAYBE_SET_OOM (error);
+ goto out;
+ }
+
+ attribute_names = dbus_new0 (const char *, n_attributes + 1);
+ attribute_values = dbus_new0 (const char *, n_attributes + 1);
+ if (attribute_names == NULL || attribute_values == NULL)
+ {
+ _DBUS_SET_OOM (error);
+ goto out;
+ }
+ i = 0;
+ while ((status = xmlTextReaderMoveToNextAttribute (reader)) == 1)
+ {
+ _dbus_assert (i < n_attributes);
+ attribute_names[i] = xmlTextReaderConstName (reader);
+ attribute_values[i] = xmlTextReaderConstValue (reader);
+ if (attribute_names[i] == NULL || attribute_values[i] == NULL)
+ {
+ _DBUS_MAYBE_SET_OOM (error);
+ goto out;
+ }
+ i++;
+ }
+ if (status == -1)
+ {
+ _DBUS_MAYBE_SET_OOM (error);
+ goto out;
+ }
+ _dbus_assert (i == n_attributes);
+
+ ret = bus_config_parser_start_element (parser, name,
+ attribute_names, attribute_values,
+ error);
+ if (ret && is_empty == 1)
+ ret = bus_config_parser_end_element (parser, name, error);
+
+ out:
+ dbus_free (attribute_names);
+ dbus_free (attribute_values);
+
+ return ret;
}
-static char*
-libxml_strdup (const char *str)
+static void xml_shut_up (void *ctx, const char *msg, ...)
{
- return _dbus_strdup (str);
+ return;
}
static void
-xml_text_reader_error (void *arg,
- const char *msg,
- xmlParserSeverities severity,
- xmlTextReaderLocatorPtr locator)
+xml_text_reader_error (void *arg, xmlErrorPtr xml_error)
{
DBusError *error = arg;
-
+
+#if 0
+ _dbus_verbose ("XML_ERROR level=%d, domain=%d, code=%d, msg=%s\n",
+ xml_error->level, xml_error->domain,
+ xml_error->code, xml_error->message);
+#endif
+
if (!dbus_error_is_set (error))
{
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "Error loading config file: %s",
- msg);
+ if (xml_error->code == XML_ERR_NO_MEMORY)
+ _DBUS_SET_OOM (error);
+ else if (xml_error->level == XML_ERR_ERROR ||
+ xml_error->level == XML_ERR_FATAL)
+ dbus_set_error (error, DBUS_ERROR_FAILED,
+ "Error loading config file: '%s'",
+ xml_error->message);
}
}
+
BusConfigParser*
bus_config_load (const DBusString *file,
dbus_bool_t is_toplevel,
{
xmlTextReader *reader;
- const char *filename;
BusConfigParser *parser;
- DBusString dirname;
+ DBusString dirname, data;
DBusError tmp_error;
int ret;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
- filename = _dbus_string_get_const_data (file);
parser = NULL;
reader = NULL;
- dbus_error_init (&tmp_error);
- if (xmlMemSetup (libxml_free,
- libxml_malloc,
- libxml_realloc,
- libxml_strdup) != 0)
+ if (!_dbus_string_init (&dirname))
{
- /* Current libxml can't possibly fail here, but just being
- * paranoid; don't really know why xmlMemSetup() returns an
- * error code, assuming some version of libxml had a reason.
- */
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "xmlMemSetup() didn't work for some reason\n");
+ _DBUS_SET_OOM (error);
return NULL;
}
- if (!_dbus_string_init (&dirname))
+ if (!_dbus_string_init (&data))
{
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ _DBUS_SET_OOM (error);
+ _dbus_string_free (&dirname);
return NULL;
}
+ if (is_toplevel)
+ {
+ /* xmlMemSetup only fails if one of the functions is NULL */
+ xmlMemSetup (dbus_free,
+ dbus_malloc,
+ dbus_realloc,
+ _dbus_strdup);
+ xmlInitParser ();
+ xmlSetGenericErrorFunc (NULL, xml_shut_up);
+ }
+
if (!_dbus_string_get_dirname (file, &dirname))
{
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ _DBUS_SET_OOM (error);
goto failed;
}
parser = bus_config_parser_new (&dirname, is_toplevel, parent);
if (parser == NULL)
{
- dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
+ _DBUS_SET_OOM (error);
goto failed;
}
- errno = 0;
- reader = xmlNewTextReaderFilename (filename);
+ if (!_dbus_file_get_contents (&data, file, error))
+ goto failed;
+ reader = xmlReaderForMemory (_dbus_string_get_const_data (&data),
+ _dbus_string_get_length (&data),
+ NULL, NULL, 0);
if (reader == NULL)
{
- dbus_set_error (error, DBUS_ERROR_FAILED,
- "Failed to load configuration file %s: %s\n",
- filename,
- errno != 0 ? strerror (errno) : "Unknown error");
-
+ _DBUS_SET_OOM (error);
goto failed;
}
- xmlTextReaderSetErrorHandler (reader, xml_text_reader_error, &tmp_error);
+ xmlTextReaderSetParserProp (reader, XML_PARSER_SUBST_ENTITIES, 1);
+
+ dbus_error_init (&tmp_error);
+ xmlTextReaderSetStructuredErrorHandler (reader, xml_text_reader_error, &tmp_error);
while ((ret = xmlTextReaderRead (reader)) == 1)
{
if (dbus_error_is_set (&tmp_error))
goto reader_out;
-
- /* "enum" anyone? http://dotgnu.org/pnetlib-doc/System/Xml/XmlNodeType.html for
- * the magic numbers
- */
+
type = xmlTextReaderNodeType (reader);
+ if (type == -1)
+ {
+ _DBUS_MAYBE_SET_OOM (&tmp_error);
+ goto reader_out;
+ }
+
+ switch ((xmlReaderTypes) type) {
+ case XML_READER_TYPE_ELEMENT:
+ xml_text_start_element (parser, reader, &tmp_error);
+ break;
+
+ case XML_READER_TYPE_TEXT:
+ case XML_READER_TYPE_CDATA:
+ {
+ DBusString content;
+ const char *value;
+ value = xmlTextReaderConstValue (reader);
+ if (value != NULL)
+ {
+ _dbus_string_init_const (&content, value);
+ bus_config_parser_content (parser, &content, &tmp_error);
+ }
+ else
+ _DBUS_MAYBE_SET_OOM (&tmp_error);
+ break;
+ }
+
+ case XML_READER_TYPE_DOCUMENT_TYPE:
+ {
+ const char *name;
+ name = xmlTextReaderConstName (reader);
+ if (name != NULL)
+ bus_config_parser_check_doctype (parser, name, &tmp_error);
+ else
+ _DBUS_MAYBE_SET_OOM (&tmp_error);
+ break;
+ }
+
+ case XML_READER_TYPE_END_ELEMENT:
+ {
+ const char *name;
+ name = xmlTextReaderConstName (reader);
+ if (name != NULL)
+ bus_config_parser_end_element (parser, name, &tmp_error);
+ else
+ _DBUS_MAYBE_SET_OOM (&tmp_error);
+ break;
+ }
+
+ case XML_READER_TYPE_DOCUMENT:
+ case XML_READER_TYPE_DOCUMENT_FRAGMENT:
+ case XML_READER_TYPE_PROCESSING_INSTRUCTION:
+ case XML_READER_TYPE_COMMENT:
+ case XML_READER_TYPE_ENTITY:
+ case XML_READER_TYPE_NOTATION:
+ case XML_READER_TYPE_WHITESPACE:
+ case XML_READER_TYPE_SIGNIFICANT_WHITESPACE:
+ case XML_READER_TYPE_END_ENTITY:
+ case XML_READER_TYPE_XML_DECLARATION:
+ /* nothing to do, just read on */
+ break;
+
+ case XML_READER_TYPE_NONE:
+ case XML_READER_TYPE_ATTRIBUTE:
+ case XML_READER_TYPE_ENTITY_REFERENCE:
+ _dbus_assert_not_reached ("unexpected nodes in XML");
+ }
+
if (dbus_error_is_set (&tmp_error))
goto reader_out;
-
- /* FIXME I don't really know exactly what I need to do to
- * resolve all entities and so on to get the full content of a
- * node or attribute value. I'm worried about whether I need to
- * manually handle stuff like <
- */
}
if (ret == -1)
- {
- if (!dbus_error_is_set (&tmp_error))
- dbus_set_error (&tmp_error,
- DBUS_ERROR_FAILED,
- "Unknown failure loading configuration file");
- }
-
+ _DBUS_MAYBE_SET_OOM (&tmp_error);
+
reader_out:
xmlFreeTextReader (reader);
reader = NULL;
if (!bus_config_parser_finished (parser, error))
goto failed;
_dbus_string_free (&dirname);
+ _dbus_string_free (&data);
+ if (is_toplevel)
+ xmlCleanupParser();
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
return parser;
failed:
_DBUS_ASSERT_ERROR_IS_SET (error);
_dbus_string_free (&dirname);
+ _dbus_string_free (&data);
+ if (is_toplevel)
+ xmlCleanupParser();
if (parser)
bus_config_parser_unref (parser);
_dbus_assert (reader == NULL); /* must go to reader_out first */
projects / platform / upstream / dbus.git / blobdiff