1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ofdbus/dbus-glib/dbus/dbus-gloader-expat.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,266 @@
1.4 +/* -*- mode: C; c-file-style: "gnu" -*- */
1.5 +/* dbus-gloader-expat.c expat XML loader
1.6 + *
1.7 + * Copyright (C) 2003 Red Hat, Inc.
1.8 + *
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 "dbus-gparser.h"
1.28 +#include <expat.h>
1.29 +#include <string.h>
1.30 +
1.31 +static void*
1.32 +expat_g_malloc (size_t sz)
1.33 +{
1.34 + return g_malloc (sz);
1.35 +}
1.36 +
1.37 +static void*
1.38 +expat_g_realloc (void *mem, size_t sz)
1.39 +{
1.40 + return g_realloc (mem, sz);
1.41 +}
1.42 +
1.43 +static XML_Memory_Handling_Suite memsuite =
1.44 +{
1.45 + expat_g_malloc,
1.46 + expat_g_realloc,
1.47 + g_free
1.48 +};
1.49 +
1.50 +/**
1.51 + * Context for Expat parser for introspection data.
1.52 + */
1.53 +typedef struct
1.54 +{
1.55 + Parser *parser; /**< The parser for the introspection data */
1.56 + const char *filename; /**< The filename being loaded */
1.57 + GString *content; /**< The content of the current element */
1.58 + GError **error; /**< Error return location */
1.59 + gboolean failed; /**< True if parse has failed */
1.60 +} ExpatParseContext;
1.61 +
1.62 +static dbus_bool_t
1.63 +process_content (ExpatParseContext *context)
1.64 +{
1.65 + if (context->failed)
1.66 + return FALSE;
1.67 +
1.68 + if (context->content->len > 0)
1.69 + {
1.70 + if (!parser_content (context->parser,
1.71 + context->content->str,
1.72 + context->content->len,
1.73 + context->error))
1.74 + {
1.75 + context->failed = TRUE;
1.76 + return FALSE;
1.77 + }
1.78 + g_string_set_size (context->content, 0);
1.79 + }
1.80 +
1.81 + return TRUE;
1.82 +}
1.83 +
1.84 +static void
1.85 +expat_StartElementHandler (void *userData,
1.86 + const XML_Char *name,
1.87 + const XML_Char **atts)
1.88 +{
1.89 + ExpatParseContext *context = userData;
1.90 + int i;
1.91 + char **names;
1.92 + char **values;
1.93 +
1.94 + /* Expat seems to suck and can't abort the parse if we
1.95 + * throw an error. Expat 2.0 is supposed to fix this.
1.96 + */
1.97 + if (context->failed)
1.98 + return;
1.99 +
1.100 + if (!process_content (context))
1.101 + return;
1.102 +
1.103 + /* "atts" is key, value, key, value, NULL */
1.104 + for (i = 0; atts[i] != NULL; ++i)
1.105 + ; /* nothing */
1.106 +
1.107 + g_assert (i % 2 == 0);
1.108 + names = g_new0 (char *, i / 2 + 1);
1.109 + values = g_new0 (char *, i / 2 + 1);
1.110 +
1.111 + i = 0;
1.112 + while (atts[i] != NULL)
1.113 + {
1.114 + g_assert (i % 2 == 0);
1.115 + names [i / 2] = (char*) atts[i];
1.116 + values[i / 2] = (char*) atts[i+1];
1.117 +
1.118 + i += 2;
1.119 + }
1.120 +
1.121 + if (!parser_start_element (context->parser,
1.122 + name,
1.123 + (const char **) names,
1.124 + (const char **) values,
1.125 + context->error))
1.126 + {
1.127 + g_free (names);
1.128 + g_free (values);
1.129 + context->failed = TRUE;
1.130 + return;
1.131 + }
1.132 +
1.133 + g_free (names);
1.134 + g_free (values);
1.135 +}
1.136 +
1.137 +static void
1.138 +expat_EndElementHandler (void *userData,
1.139 + const XML_Char *name)
1.140 +{
1.141 + ExpatParseContext *context = userData;
1.142 +
1.143 + if (!process_content (context))
1.144 + return;
1.145 +
1.146 + if (!parser_end_element (context->parser,
1.147 + name,
1.148 + context->error))
1.149 + {
1.150 + context->failed = TRUE;
1.151 + return;
1.152 + }
1.153 +}
1.154 +
1.155 +/* s is not 0 terminated. */
1.156 +static void
1.157 +expat_CharacterDataHandler (void *userData,
1.158 + const XML_Char *s,
1.159 + int len)
1.160 +{
1.161 + ExpatParseContext *context = userData;
1.162 +
1.163 + if (context->failed)
1.164 + return;
1.165 +
1.166 + g_string_append_len (context->content,
1.167 + s, len);
1.168 +}
1.169 +
1.170 +NodeInfo*
1.171 +description_load_from_file (const char *filename,
1.172 + GError **error)
1.173 +{
1.174 + char *contents;
1.175 + gsize len;
1.176 + NodeInfo *nodes;
1.177 +
1.178 + contents = NULL;
1.179 + if (!g_file_get_contents (filename, &contents, &len, error))
1.180 + return NULL;
1.181 +
1.182 + nodes = description_load_from_string (contents, len, error);
1.183 + g_free (contents);
1.184 +
1.185 + return nodes;
1.186 +}
1.187 +
1.188 +NodeInfo*
1.189 +description_load_from_string (const char *str,
1.190 + int len,
1.191 + GError **error)
1.192 +{
1.193 + XML_Parser expat;
1.194 + ExpatParseContext context;
1.195 + NodeInfo *nodes;
1.196 +
1.197 + g_return_val_if_fail (error == NULL || *error == NULL, NULL);
1.198 +
1.199 + if (len < 0)
1.200 + len = strlen (str);
1.201 +
1.202 + expat = NULL;
1.203 + context.parser = NULL;
1.204 + context.error = error;
1.205 + context.failed = FALSE;
1.206 +
1.207 + expat = XML_ParserCreate_MM ("UTF-8", &memsuite, NULL);
1.208 + if (expat == NULL)
1.209 + g_error ("No memory to create XML parser\n");
1.210 +
1.211 + context.parser = parser_new ();
1.212 + context.content = g_string_new (NULL);
1.213 +
1.214 + XML_SetUserData (expat, &context);
1.215 + XML_SetElementHandler (expat,
1.216 + expat_StartElementHandler,
1.217 + expat_EndElementHandler);
1.218 + XML_SetCharacterDataHandler (expat,
1.219 + expat_CharacterDataHandler);
1.220 +
1.221 + if (!XML_Parse (expat, str, len, TRUE))
1.222 + {
1.223 + if (context.error != NULL &&
1.224 + *context.error == NULL)
1.225 + {
1.226 + enum XML_Error e;
1.227 +
1.228 + e = XML_GetErrorCode (expat);
1.229 + if (e == XML_ERROR_NO_MEMORY)
1.230 + g_error ("Not enough memory to parse XML document");
1.231 + else
1.232 + g_set_error (error,
1.233 + G_MARKUP_ERROR,
1.234 + G_MARKUP_ERROR_PARSE,
1.235 + "Error in D-BUS description XML, line %d, column %d: %s\n",
1.236 + XML_GetCurrentLineNumber (expat),
1.237 + XML_GetCurrentColumnNumber (expat),
1.238 + XML_ErrorString (e));
1.239 + }
1.240 +
1.241 + goto failed;
1.242 + }
1.243 +
1.244 + if (context.failed)
1.245 + goto failed;
1.246 +
1.247 + if (!parser_finished (context.parser, error))
1.248 + goto failed;
1.249 +
1.250 + XML_ParserFree (expat);
1.251 + g_string_free (context.content, TRUE);
1.252 +
1.253 + g_return_val_if_fail (error == NULL || *error == NULL, NULL);
1.254 + nodes = parser_get_nodes (context.parser);
1.255 + node_info_ref (nodes);
1.256 + parser_unref (context.parser);
1.257 + return nodes;
1.258 +
1.259 + failed:
1.260 + g_return_val_if_fail (error == NULL || *error != NULL, NULL);
1.261 +
1.262 + g_string_free (context.content, TRUE);
1.263 + if (expat)
1.264 + XML_ParserFree (expat);
1.265 + if (context.parser)
1.266 + parser_unref (context.parser);
1.267 + return NULL;
1.268 +}
1.269 +