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/*
* plist.c
* Builds plist XML structures.
*
* Copyright (c) 2008 Zach C. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <string.h>
#include <assert.h>
#include "plist.h"
const char *plist_base = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\
<!DOCTYPE plist PUBLIC \"-//Apple Computer//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n\
<plist version=\"1.0\">\n\
</plist>\0";
/** Formats a block of text to be a given indentation and width.
*
* The total width of the return string will be depth + cols.
*
* @param buf The string to format.
* @param cols The number of text columns for returned block of text.
* @param depth The number of tabs to indent the returned block of text.
*
* @return The formatted string.
*/
char *format_string(const char *buf, int cols, int depth)
{
int colw = depth + cols + 1;
int len = strlen(buf);
int nlines = len / cols + 1;
char *new_buf = (char *) malloc(nlines * colw + depth + 1);
int i = 0;
int j = 0;
assert(cols >= 0);
assert(depth >= 0);
// Inserts new lines and tabs at appropriate locations
for (i = 0; i < nlines; i++) {
new_buf[i * colw] = '\n';
for (j = 0; j < depth; j++)
new_buf[i * colw + 1 + j] = '\t';
memcpy(new_buf + i * colw + 1 + depth, buf + i * cols, cols);
}
new_buf[len + (1 + depth) * nlines] = '\n';
// Inserts final row of indentation and termination character
for (j = 0; j < depth; j++)
new_buf[len + (1 + depth) * nlines + 1 + j] = '\t';
new_buf[len + (1 + depth) * nlines + depth + 1] = '\0';
return new_buf;
}
/** Creates a new plist XML document.
*
* @return The plist XML document.
*/
xmlDocPtr new_plist()
{
char *plist = strdup(plist_base);
xmlDocPtr plist_xml = xmlReadMemory(plist, strlen(plist), NULL, NULL, 0);
if (!plist_xml)
return NULL;
free(plist);
return plist_xml;
}
/** Destroys a previously created XML document.
*
* @param plist The XML document to destroy.
*/
void free_plist(xmlDocPtr plist)
{
if (!plist)
return;
xmlFreeDoc(plist);
}
/** Adds a new node as a child to a given node.
*
* This is a lower level function so you probably want to use
* add_key_str_dict_element, add_key_dict_node or add_key_data_dict_element
* instead.
*
* @param plist The plist XML document to which the to_node belongs.
* @param name The name of the new node.
* @param content The string containing the text node of the new node.
* @param to_node The node to attach the child node to. If none is given, the
* root node of the given document is used.
* @param depth The number of tabs to indent the new node.
*
* @return The newly created node.
*/
xmlNode *add_child_to_plist(xmlDocPtr plist, const char *name, const char *content, xmlNode * to_node, int depth)
{
int i = 0;
xmlNode *child;
if (!plist)
return NULL;
assert(depth >= 0);
if (!to_node)
to_node = xmlDocGetRootElement(plist);
for (i = 0; i < depth; i++) {
xmlNodeAddContent(to_node, "\t");
}
child = xmlNewChild(to_node, NULL, name, content);
xmlNodeAddContent(to_node, "\n");
return child;
}
/** Adds a string key-pair to a plist XML document.
*
* @param plist The plist XML document to add the new node to.
* @param dict The dictionary node within the plist XML document to add the new node to.
* @param key The string containing the key value.
* @param value The string containing the value.
* @param depth The number of tabs to indent the new node.
*
* @return The newly created key node.
*/
xmlNode *add_key_str_dict_element(xmlDocPtr plist, xmlNode * dict, const char *key, const char *value, int depth)
{
xmlNode *keyPtr;
keyPtr = add_child_to_plist(plist, "key", key, dict, depth);
add_child_to_plist(plist, "string", value, dict, depth);
return keyPtr;
}
/** Adds a new dictionary key-pair to a plist XML document.
*
* @param plist The plist XML document to add the new node to.
* @param dict The dictionary node within the plist XML document to add the new node to.
* @param key The string containing the key value.
* @param value The string containing the value.
* @param depth The number of tabs to indent the new node.
*
* @return The newly created dict node.
*/
xmlNode *add_key_dict_node(xmlDocPtr plist, xmlNode * dict, const char *key, const char *value, int depth)
{
xmlNode *child;
add_child_to_plist(plist, "key", key, dict, depth);
child = add_child_to_plist(plist, "dict", value, dict, depth);
return child;
}
/** Adds a new data dictionary key-pair to a plist XML document.
*
* @param plist The plist XML document to add the new node to.
* @param dict The dictionary node within the plist XML document to add the new node to.
* @param key The string containing the key value.
* @param value The string containing the value.
* @param depth The number of tabs to indent the new node.
*
* @return The newly created key node.
*/
xmlNode *add_key_data_dict_element(xmlDocPtr plist, xmlNode * dict, const char *key, const char *value, int depth)
{
xmlNode *keyPtr;
keyPtr = add_child_to_plist(plist, "key", key, dict, depth);
add_child_to_plist(plist, "data", format_string(value, 60, depth), dict, depth);
return keyPtr;
}
/** Reads a set of keys and strings into an array from a plist XML document.
*
* @param dict The root XMLNode of a plist XML document to be read.
*
* @return An array where each even number is a key and the odd numbers are
* values. If the odd number is \0, that's the end of the list.
*/
char **read_dict_element_strings(xmlNode * dict)
{
char **return_me = NULL, **old = NULL;
int current_length = 0;
int current_pos = 0;
xmlNode *dict_walker;
for (dict_walker = dict->children; dict_walker; dict_walker = dict_walker->next) {
if (!xmlStrcmp(dict_walker->name, "key")) {
current_length += 2;
old = return_me;
return_me = realloc(return_me, sizeof(char *) * current_length);
if (!return_me) {
free(old);
return NULL;
}
return_me[current_pos++] = xmlNodeGetContent(dict_walker);
return_me[current_pos++] = xmlNodeGetContent(dict_walker->next->next);
}
}
old = return_me;
return_me = realloc(return_me, sizeof(char *) * (current_length + 1));
return_me[current_pos] = NULL;
return return_me;
}
/** Destroys a dictionary as returned by read_dict_element_strings
*/
void free_dictionary(char **dictionary)
{
int i = 0;
if (!dictionary)
return;
for (i = 0; dictionary[i]; i++) {
free(dictionary[i]);
}
free(dictionary);
}
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