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openbox/obt/xml.c
Mikael Magnusson 122e2a81d3 Some fixes found by coverity for things used before a null check 
In the second case, we actually check the wrong variable.
2014-10-28 05:42:28 +01:00

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/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
obt/xml.c for the Openbox window manager
Copyright (c) 2003-2007 Dana Jansens
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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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.
See the COPYING file for a copy of the GNU General Public License.
*/
#include "obt/xml.h"
#include "obt/paths.h"
#include <libxml/xinclude.h>
#include <glib.h>
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
struct Callback {
gchar *tag;
ObtXmlCallback func;
gpointer data;
};
struct _ObtXmlInst {
gint ref;
ObtPaths *xdg_paths;
GHashTable *callbacks;
xmlDocPtr doc;
xmlNodePtr root;
gchar *path;
gchar *last_error_file;
gint last_error_line;
gchar *last_error_message;
};
static void obt_xml_save_last_error(ObtXmlInst* inst);
static void destfunc(struct Callback *c)
{
g_free(c->tag);
g_slice_free(struct Callback, c);
}
ObtXmlInst* obt_xml_instance_new(void)
{
ObtXmlInst *i = g_slice_new(ObtXmlInst);
i->ref = 1;
i->xdg_paths = obt_paths_new();
i->callbacks = g_hash_table_new_full(g_str_hash, g_str_equal, NULL,
(GDestroyNotify)destfunc);
i->doc = NULL;
i->root = NULL;
i->path = NULL;
i->last_error_file = NULL;
i->last_error_line = -1;
i->last_error_message = NULL;
return i;
}
void obt_xml_instance_ref(ObtXmlInst *i)
{
++i->ref;
}
void obt_xml_instance_unref(ObtXmlInst *i)
{
if (i && --i->ref == 0) {
obt_paths_unref(i->xdg_paths);
g_hash_table_destroy(i->callbacks);
g_free(i->last_error_file);
g_free(i->last_error_message);
g_slice_free(ObtXmlInst, i);
}
}
xmlDocPtr obt_xml_doc(ObtXmlInst *i)
{
g_assert(i->doc); /* a doc is open? */
return i->doc;
}
xmlNodePtr obt_xml_root(ObtXmlInst *i)
{
g_assert(i->doc); /* a doc is open? */
return i->root;
}
void obt_xml_register(ObtXmlInst *i, const gchar *tag,
ObtXmlCallback func, gpointer data)
{
struct Callback *c;
if (g_hash_table_lookup(i->callbacks, tag)) {
g_error("Tag '%s' already registered", tag);
return;
}
c = g_slice_new(struct Callback);
c->tag = g_strdup(tag);
c->func = func;
c->data = data;
g_hash_table_insert(i->callbacks, c->tag, c);
}
void obt_xml_unregister(ObtXmlInst *i, const gchar *tag)
{
g_hash_table_remove(i->callbacks, tag);
}
static gboolean load_file(ObtXmlInst *i,
const gchar *domain,
const gchar *filename,
const gchar *root_node,
GSList *paths)
{
GSList *it;
gboolean r = FALSE;
g_assert(i->doc == NULL); /* another doc isn't open already? */
xmlResetLastError();
for (it = paths; !r && it; it = g_slist_next(it)) {
gchar *path;
struct stat s;
if (!domain && !filename) /* given a full path to the file */
path = g_strdup(it->data);
else
path = g_build_filename(it->data, domain, filename, NULL);
if (stat(path, &s) >= 0) {
/* XML_PARSE_BLANKS is needed apparently, or the tree can end up
with extra nodes in it. */
i->doc = xmlReadFile(path, NULL, (XML_PARSE_NOBLANKS |
XML_PARSE_RECOVER));
xmlXIncludeProcessFlags(i->doc, (XML_PARSE_NOBLANKS |
XML_PARSE_RECOVER));
if (i->doc) {
i->root = xmlDocGetRootElement(i->doc);
if (!i->root) {
xmlFreeDoc(i->doc);
i->doc = NULL;
g_message("%s is an empty XML document", path);
}
else if (xmlStrcmp(i->root->name,
(const xmlChar*)root_node)) {
xmlFreeDoc(i->doc);
i->doc = NULL;
i->root = NULL;
g_message("XML document %s is of wrong type. Root "
"node is not '%s'", path, root_node);
}
else {
i->path = g_strdup(path);
r = TRUE; /* ok! */
}
}
}
g_free(path);
}
obt_xml_save_last_error(i);
return r;
}
gboolean obt_xml_load_file(ObtXmlInst *i,
const gchar *path,
const gchar *root_node)
{
GSList *paths;
gboolean r;
paths = g_slist_append(NULL, g_strdup(path));
r = load_file(i, NULL, NULL, root_node, paths);
while (paths) {
g_free(paths->data);
paths = g_slist_delete_link(paths, paths);
}
return r;
}
gboolean obt_xml_load_config_file(ObtXmlInst *i,
const gchar *domain,
const gchar *filename,
const gchar *root_node)
{
GSList *it, *paths = NULL;
gboolean r;
for (it = obt_paths_config_dirs(i->xdg_paths); it; it = g_slist_next(it))
paths = g_slist_append(paths, g_strdup(it->data));
r = load_file(i, domain, filename, root_node, paths);
while (paths) {
g_free(paths->data);
paths = g_slist_delete_link(paths, paths);
}
return r;
}
gboolean obt_xml_load_data_file(ObtXmlInst *i,
const gchar *domain,
const gchar *filename,
const gchar *root_node)
{
GSList *it, *paths = NULL;
gboolean r;
for (it = obt_paths_data_dirs(i->xdg_paths); it; it = g_slist_next(it))
paths = g_slist_append(paths, g_strdup(it->data));
r = load_file(i, domain, filename, root_node, paths);
while (paths) {
g_free(paths->data);
paths = g_slist_delete_link(paths, paths);
}
return r;
}
gboolean obt_xml_load_theme_file(ObtXmlInst *i,
const gchar *theme,
const gchar *domain,
const gchar *filename,
const gchar *root_node)
{
GSList *it, *paths = NULL;
gboolean r;
/* use ~/.themes for backwards compatibility */
paths = g_slist_append
(paths, g_build_filename(g_get_home_dir(), ".themes", theme, NULL));
for (it = obt_paths_data_dirs(i->xdg_paths); it; it = g_slist_next(it))
paths = g_slist_append
(paths, g_build_filename(it->data, "themes", theme, NULL));
r = load_file(i, domain, filename, root_node, paths);
while (paths) {
g_free(paths->data);
paths = g_slist_delete_link(paths, paths);
}
return r;
}
gboolean obt_xml_load_mem(ObtXmlInst *i,
gpointer data, guint len, const gchar *root_node)
{
gboolean r = FALSE;
g_assert(i->doc == NULL); /* another doc isn't open already? */
xmlResetLastError();
i->doc = xmlParseMemory(data, len);
if (i->doc) {
i->root = xmlDocGetRootElement(i->doc);
if (!i->root) {
xmlFreeDoc(i->doc);
i->doc = NULL;
g_message("Given memory is an empty document");
}
else if (xmlStrcmp(i->root->name, (const xmlChar*)root_node)) {
xmlFreeDoc(i->doc);
i->doc = NULL;
i->root = NULL;
g_message("XML Document in given memory is of wrong "
"type. Root node is not '%s'\n", root_node);
}
else
r = TRUE; /* ok ! */
}
obt_xml_save_last_error(i);
return r;
}
static void obt_xml_save_last_error(ObtXmlInst* inst)
{
xmlErrorPtr error = xmlGetLastError();
if (error) {
inst->last_error_file = g_strdup(error->file);
inst->last_error_line = error->line;
inst->last_error_message = g_strdup(error->message);
xmlResetError(error);
}
}
gboolean obt_xml_last_error(ObtXmlInst *inst)
{
return inst->last_error_file &&
inst->last_error_line >= 0 &&
inst->last_error_message;
}
gchar* obt_xml_last_error_file(ObtXmlInst *inst)
{
if (!obt_xml_last_error(inst))
return NULL;
return inst->last_error_file;
}
gint obt_xml_last_error_line(ObtXmlInst *inst)
{
if (!obt_xml_last_error(inst))
return -1;
return inst->last_error_line;
}
gchar* obt_xml_last_error_message(ObtXmlInst *inst)
{
if (!obt_xml_last_error(inst))
return NULL;
return inst->last_error_message;
}
gboolean obt_xml_save_file(ObtXmlInst *inst,
const gchar *path,
gboolean pretty)
{
return xmlSaveFormatFile(path, inst->doc, pretty) != -1;
}
void obt_xml_close(ObtXmlInst *i)
{
if (i && i->doc) {
xmlFreeDoc(i->doc);
g_free(i->path);
i->doc = NULL;
i->root = NULL;
i->path = NULL;
}
}
void obt_xml_tree(ObtXmlInst *i, xmlNodePtr node)
{
g_assert(i->doc); /* a doc is open? */
while (node) {
if (node->name) {
struct Callback *c = g_hash_table_lookup(i->callbacks, node->name);
if (c) c->func(node, c->data);
}
node = node->next;
}
}
void obt_xml_tree_from_root(ObtXmlInst *i)
{
obt_xml_tree(i, i->root->children);
}
gchar *obt_xml_node_string_unstripped(xmlNodePtr node)
{
xmlChar *c = xmlNodeGetContent(node);
gchar *s;
s = g_strdup(c ? (gchar*)c : "");
xmlFree(c);
return s;
}
gchar *obt_xml_node_string(xmlNodePtr node)
{
gchar* result = obt_xml_node_string_unstripped(node);
g_strstrip(result); /* strip leading/trailing whitespace */
return result;
}
gint obt_xml_node_int(xmlNodePtr node)
{
xmlChar *c = xmlNodeGetContent(node);
gint i;
if (c) g_strstrip((char*)c); /* strip leading/trailing whitespace */
i = c ? atoi((gchar*)c) : 0;
xmlFree(c);
return i;
}
gboolean obt_xml_node_bool(xmlNodePtr node)
{
xmlChar *c = xmlNodeGetContent(node);
gboolean b = FALSE;
if (c) g_strstrip((char*)c); /* strip leading/trailing whitespace */
if (c && !xmlStrcasecmp(c, (const xmlChar*) "true"))
b = TRUE;
else if (c && !xmlStrcasecmp(c, (const xmlChar*) "yes"))
b = TRUE;
else if (c && !xmlStrcasecmp(c, (const xmlChar*) "on"))
b = TRUE;
xmlFree(c);
return b;
}
gboolean obt_xml_node_contains(xmlNodePtr node, const gchar *val)
{
xmlChar *c = xmlNodeGetContent(node);
gboolean r;
if (c) g_strstrip((char*)c); /* strip leading/trailing whitespace */
r = !xmlStrcasecmp(c, (const xmlChar*) val);
xmlFree(c);
return r;
}
xmlNodePtr obt_xml_find_node(xmlNodePtr node, const gchar *tag)
{
while (node) {
if (!xmlStrcmp(node->name, (const xmlChar*) tag))
return node;
node = node->next;
}
return NULL;
}
gboolean obt_xml_attr_bool(xmlNodePtr node, const gchar *name,
gboolean *value)
{
xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
gboolean r = FALSE;
if (c) {
g_strstrip((char*)c); /* strip leading/trailing whitespace */
if (!xmlStrcasecmp(c, (const xmlChar*) "true"))
*value = TRUE, r = TRUE;
else if (!xmlStrcasecmp(c, (const xmlChar*) "yes"))
*value = TRUE, r = TRUE;
else if (!xmlStrcasecmp(c, (const xmlChar*) "on"))
*value = TRUE, r = TRUE;
else if (!xmlStrcasecmp(c, (const xmlChar*) "false"))
*value = FALSE, r = TRUE;
else if (!xmlStrcasecmp(c, (const xmlChar*) "no"))
*value = FALSE, r = TRUE;
else if (!xmlStrcasecmp(c, (const xmlChar*) "off"))
*value = FALSE, r = TRUE;
}
xmlFree(c);
return r;
}
gboolean obt_xml_attr_int(xmlNodePtr node, const gchar *name, gint *value)
{
xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
gboolean r = FALSE;
if (c) {
g_strstrip((char*)c); /* strip leading/trailing whitespace */
*value = atoi((gchar*)c);
r = TRUE;
}
xmlFree(c);
return r;
}
gboolean obt_xml_attr_string_unstripped(xmlNodePtr node, const gchar *name,
gchar **value)
{
xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
gboolean r = FALSE;
if (c) {
*value = g_strdup((gchar*)c);
r = TRUE;
}
xmlFree(c);
return r;
}
gboolean obt_xml_attr_string(xmlNodePtr node, const gchar *name,
gchar **value)
{
gboolean result = obt_xml_attr_string_unstripped(node, name, value);
if (result)
g_strstrip(*value); /* strip leading/trailing whitespace */
return result;
}
gboolean obt_xml_attr_contains(xmlNodePtr node, const gchar *name,
const gchar *val)
{
xmlChar *c = xmlGetProp(node, (const xmlChar*) name);
gboolean r = FALSE;
if (c) {
g_strstrip((char*)c); /* strip leading/trailing whitespace */
r = !xmlStrcasecmp(c, (const xmlChar*) val);
}
xmlFree(c);
return r;
}
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