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Diffstat (limited to 'e-util/e-xml-hash-utils.c')
| -rw-r--r-- | e-util/e-xml-hash-utils.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/e-util/e-xml-hash-utils.c b/e-util/e-xml-hash-utils.c new file mode 100644 index 0000000000..efb29f5fb6 --- /dev/null +++ b/e-util/e-xml-hash-utils.c @@ -0,0 +1,235 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ +/* + * Copyright (C) 2001-2003 Ximian, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "e-xml-hash-utils.h" + +#include <stdlib.h> +#include <string.h> +#include <libxml/xmlmemory.h> + +GHashTable * +e_xml_to_hash (xmlDoc *doc, EXmlHashType type) +{ + xmlNode *root, *node; + const char *key, *value; + GHashTable *hash; + + hash = g_hash_table_new (g_str_hash, g_str_equal); + + root = xmlDocGetRootElement (doc); + for (node = root->xmlChildrenNode; node; node = node->next) { + if (node->name == NULL) + continue; + + if (type == E_XML_HASH_TYPE_OBJECT_UID && + !strcmp (node->name, "object")) + key = xmlGetProp (node, "uid"); + else + key = node->name; + + value = xmlNodeListGetString (doc, node->xmlChildrenNode, 1); + if (!key || !value) { + g_warning ("Found an entry with missing properties!!"); + continue; + } + + g_hash_table_insert (hash, g_strdup (key), g_strdup (value)); + } + + return hash; +} + + +struct save_data { + EXmlHashType type; + xmlNode *root; +}; + +static void +foreach_save_func (gpointer key, gpointer value, gpointer user_data) +{ + struct save_data *sd = user_data; + xmlNodePtr new_node; + + if (sd->type == E_XML_HASH_TYPE_OBJECT_UID) { + new_node = xmlNewNode (NULL, "object"); + xmlNewProp (new_node, "uid", (const char *) key); + } else + new_node = xmlNewNode (NULL, (const char *) key); + xmlNodeSetContent (new_node, (const char *) value); + + xmlAddChild (sd->root, new_node); +} + +xmlDoc * +e_xml_from_hash (GHashTable *hash, EXmlHashType type, const char *root_name) +{ + xmlDoc *doc; + struct save_data sd; + + doc = xmlNewDoc ("1.0"); + sd.type = type; + sd.root = xmlNewDocNode (doc, NULL, root_name, NULL); + xmlDocSetRootElement (doc, sd.root); + + g_hash_table_foreach (hash, foreach_save_func, &sd); + return doc; +} + +static void +free_values (gpointer key, gpointer value, gpointer data) +{ + g_free (key); + g_free (value); +} + +void +e_xml_destroy_hash (GHashTable *hash) +{ + g_hash_table_foreach (hash, free_values, NULL); + g_hash_table_destroy (hash); +} + + + +struct EXmlHash { + char *filename; + GHashTable *objects; +}; + +EXmlHash * +e_xmlhash_new (const char *filename) +{ + EXmlHash *hash; + xmlDoc *doc; + + g_return_val_if_fail (filename != NULL, NULL); + + doc = xmlParseFile (filename); + if (!doc) + return NULL; + + hash = g_new0 (EXmlHash, 1); + hash->filename = g_strdup (filename); + hash->objects = e_xml_to_hash (doc, E_XML_HASH_TYPE_OBJECT_UID); + xmlFreeDoc (doc); + + return hash; +} + +void +e_xmlhash_add (EXmlHash *hash, const char *key, const char *data) +{ + g_return_if_fail (hash != NULL); + g_return_if_fail (key != NULL); + g_return_if_fail (data != NULL); + + e_xmlhash_remove (hash, key); + g_hash_table_insert (hash->objects, g_strdup (key), g_strdup (data)); +} + +void +e_xmlhash_remove (EXmlHash *hash, const char *key) +{ + gpointer orig_key; + gpointer orig_value; + + g_return_if_fail (hash != NULL); + g_return_if_fail (key != NULL); + + if (g_hash_table_lookup_extended (hash->objects, key, &orig_key, &orig_value)) { + g_hash_table_remove (hash->objects, key); + g_free (orig_key); + g_free (orig_value); + } +} + +EXmlHashStatus +e_xmlhash_compare (EXmlHash *hash, const char *key, const char *compare_data) +{ + char *data; + int rc; + + g_return_val_if_fail (hash != NULL, E_XMLHASH_STATUS_NOT_FOUND); + g_return_val_if_fail (key != NULL, E_XMLHASH_STATUS_NOT_FOUND); + g_return_val_if_fail (compare_data != NULL, E_XMLHASH_STATUS_NOT_FOUND); + + data = g_hash_table_lookup (hash->objects, key); + if (!data) + return E_XMLHASH_STATUS_NOT_FOUND; + + rc = strcmp (data, compare_data); + if (rc == 0) + return E_XMLHASH_STATUS_SAME; + + return E_XMLHASH_STATUS_DIFFERENT; +} + +typedef struct { + EXmlHashFunc func; + gpointer user_data; +} foreach_data_t; + +static void +foreach_hash_func (gpointer key, gpointer value, gpointer user_data) +{ + foreach_data_t *data = (foreach_data_t *) user_data; + + data->func (key, data->user_data); +} + +void +e_xmlhash_foreach_key (EXmlHash *hash, EXmlHashFunc func, gpointer user_data) +{ + foreach_data_t data; + + g_return_if_fail (hash != NULL); + g_return_if_fail (func != NULL); + + data.func = func; + data.user_data = user_data; + g_hash_table_foreach (hash->objects, foreach_hash_func, &data); +} + +void +e_xmlhash_write (EXmlHash *hash) +{ + xmlDoc *doc; + + g_return_if_fail (hash != NULL); + + doc = e_xml_from_hash (hash->objects, E_XML_HASH_TYPE_OBJECT_UID, "xmlhash"); + xmlSaveFile (hash->filename, doc); + xmlFreeDoc (doc); +} + +void +e_xmlhash_destroy (EXmlHash *hash) +{ + g_return_if_fail (hash != NULL); + + g_free (hash->filename); + e_xml_destroy_hash (hash->objects); + + g_free (hash); +} |