From bc08d5f530b3b4a73b31464ee498d610ecb2ea13 Mon Sep 17 00:00:00 2001
From: Jonathan Beck
Date: Sat, 10 Oct 2009 22:10:52 +0200
Subject: Add dict iteration. Add functions to retrieve index and key from
 node.

---
 include/plist/plist.h | 38 +++++++++++++++++++++++++++++++++++---
 src/plist.c           | 43 ++++++++++++++++++++++++++++++++++++++-----
 2 files changed, 73 insertions(+), 8 deletions(-)

diff --git a/include/plist/plist.h b/include/plist/plist.h
index beb467a..484203b 100644
--- a/include/plist/plist.h
+++ b/include/plist/plist.h
@@ -61,6 +61,11 @@ extern "C" {
  */
 	typedef void *plist_t;
 
+/**
+ * The plist dictionary iterator.
+ */
+	typedef uint32_t *plist_dict_iter;
+
 /**
  * The enumeration of plist node types.
  */
@@ -195,6 +200,14 @@ extern "C" {
  */
 	PLIST_API plist_t plist_array_get_item(plist_t node, uint32_t n);
 
+/**
+ * Get the index of an item. item must be a member of a #PLIST_ARRAY node.
+ *
+ * @param node the node
+ * @return the node index
+ */
+	PLIST_API uint32_t plist_array_get_item_index(plist_t node);
+
 /**
  * Set the nth item in a #PLIST_ARRAY node.
  * The previous item at index n will be freed using #plist_free
@@ -238,12 +251,31 @@ extern "C" {
  ********************************************/
 
 /**
- * Get size of a #PLIST_DICT node.
+ * Create iterator of a #PLIST_DICT node.
+ * The allocated iterator shoult be freed with tandard free function
+ *
+ * @param node the node of type #PLIST_DICT
+ * @param iter iterator of the #PLIST_DICT node
+ */
+	PLIST_API void plist_dict_new_iter(plist_t node, plist_dict_iter *iter);
+
+/**
+ * Increment iterator of a #PLIST_DICT node.
  *
  * @param node the node of type #PLIST_DICT
- * @return size of the #PLIST_DICT node
+ * @param iter iterator of the dictionary
+ * @param key a location to store the key, or NULL.
+ * @param val a location to store the value, or NULL.
+ */
+	PLIST_API void plist_dict_next_item(plist_t node, plist_dict_iter iter, char **key, plist_t *val);
+
+/**
+ * Get key associated to an item. Item must be member of a dictionary
+ *
+ * @param node the node
+ * @param key a location to store the key.
  */
-	PLIST_API uint32_t plist_dict_get_size(plist_t node);
+	PLIST_API void plist_dict_get_item_key(plist_t node, char **key);
 
 /**
  * Get the nth item in a #PLIST_DICT node.
diff --git a/src/plist.c b/src/plist.c
index 95bc43c..a9a6173 100644
--- a/src/plist.c
+++ b/src/plist.c
@@ -212,6 +212,14 @@ plist_t plist_array_get_item(plist_t node, uint32_t n)
 	return ret;
 }
 
+uint32_t plist_array_get_item_index(plist_t node)
+{
+	plist_t father = plist_get_parent(node);
+	if (PLIST_ARRAY == plist_get_node_type(father)) {
+		return g_node_child_position(father, node);
+	}
+}
+
 void plist_array_set_item(plist_t node, plist_t item, uint32_t n)
 {
 	if (node && PLIST_ARRAY == plist_get_node_type(node)) {
@@ -252,13 +260,38 @@ void plist_array_remove_item(plist_t node, uint32_t n)
 	return;
 }
 
-uint32_t plist_dict_get_size(plist_t node)
+void plist_dict_new_iter(plist_t node, plist_dict_iter *iter)
 {
-	uint32_t ret = 0;
-	if (node && PLIST_DICT == plist_get_node_type(node)) {
-		ret = g_node_n_children(node) / 2;
+	if (iter && *iter == NULL) {
+		*iter = malloc(sizeof(uint32_t));
+		**iter = 0;
+	}
+	return;
+}
+
+void plist_dict_next_item(plist_t node, plist_dict_iter iter, char **key, plist_t *val)
+{
+	if (node && PLIST_DICT == plist_get_node_type(node) && *iter < g_node_n_children(node) / 2) {
+
+		if (key) {
+			plist_get_key_val((plist_t)g_node_nth_child(node, 2 * (*iter)), key);
+		}
+
+		if (val) {
+			val = (plist_t) g_node_nth_child(node, 2 * (*iter) + 1);
+		}
+
+		*iter += 2;
+	}
+	return;
+}
+
+void plist_dict_get_item_key(plist_t node, char **key)
+{
+	plist_t father = plist_get_parent(node);
+	if (PLIST_DICT == plist_get_node_type(father)) {
+		plist_get_key_val( (plist_t) g_node_prev_sibling(node), key);
 	}
-	return ret;
 }
 
 plist_t plist_dict_get_item(plist_t node, const char* key)
-- 
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