From e06df9182cf6b4fa3e4b96758d1e846cf0fd1f07 Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Thu, 17 Feb 2011 07:29:12 +0000
Subject: [PATCH] +eina_list_move* for moving list node data to another list

SVN revision: 57110
---
 legacy/eina/ChangeLog               |  4 ++
 legacy/eina/src/include/eina_list.h |  4 ++
 legacy/eina/src/lib/eina_list.c     | 59 +++++++++++++++++++++++++++++
 3 files changed, 67 insertions(+)

diff --git a/legacy/eina/ChangeLog b/legacy/eina/ChangeLog
index fdd1d0fe0d..c36045ee45 100644
--- a/legacy/eina/ChangeLog
+++ b/legacy/eina/ChangeLog
@@ -18,3 +18,7 @@
 
 	* Added eina_unicode_utf8* functions for utf8 string handling
 	and conversions to and from Eina_Unicode
+
+2011-02-17  Mike Blumenkrantz
+
+        * Added eina_list_move* functions for moving list node data to other lists
diff --git a/legacy/eina/src/include/eina_list.h b/legacy/eina/src/include/eina_list.h
index e19d67d88d..5a750d1e17 100644
--- a/legacy/eina/src/include/eina_list.h
+++ b/legacy/eina/src/include/eina_list.h
@@ -110,6 +110,10 @@ EAPI Eina_List            *eina_list_demote_list(Eina_List *list, Eina_List *mov
 
 EAPI void                 *eina_list_data_find(const Eina_List *list, const void *data) EINA_PURE EINA_ARG_NONNULL(2) EINA_WARN_UNUSED_RESULT;
 EAPI Eina_List            *eina_list_data_find_list(const Eina_List *list, const void *data) EINA_PURE EINA_ARG_NONNULL(2) EINA_WARN_UNUSED_RESULT;
+
+EAPI Eina_Bool             eina_list_move(Eina_List **to, Eina_List **from, void *data);
+EAPI Eina_Bool             eina_list_move_list(Eina_List **to, Eina_List **from, Eina_List *data);
+
 EAPI Eina_List            *eina_list_free(Eina_List *list);
 
 EAPI void                 *eina_list_nth(const Eina_List *list, unsigned int n) EINA_PURE EINA_WARN_UNUSED_RESULT;
diff --git a/legacy/eina/src/lib/eina_list.c b/legacy/eina/src/lib/eina_list.c
index f3a4710543..fb59aae752 100644
--- a/legacy/eina/src/lib/eina_list.c
+++ b/legacy/eina/src/lib/eina_list.c
@@ -1200,6 +1200,65 @@ eina_list_data_find(const Eina_List *list, const void *data)
    return NULL;
 }
 
+/**
+ * @brief Move a data pointer from one list to another
+ *
+ * @param to The list to move the data to
+ * @param from The list to move from
+ * @param data The data to move
+ * @return #EINA_TRUE on success, else #EINA_FALSE
+ *
+ * This function is a shortcut for doing the following:
+ * to = eina_list_append(to, data);
+ * from = eina_list_remove(from, data);
+ */
+EAPI Eina_Bool
+eina_list_move(Eina_List **to, Eina_List **from, void *data)
+{
+   Eina_List *l;
+   
+   EINA_SAFETY_ON_NULL_RETURN_VAL(to, EINA_FALSE);
+   EINA_SAFETY_ON_NULL_RETURN_VAL(from, EINA_FALSE);
+   EINA_SAFETY_ON_NULL_RETURN_VAL(data, EINA_FALSE);
+   
+   EINA_MAGIC_CHECK_LIST(*to, EINA_FALSE);
+   EINA_MAGIC_CHECK_LIST(*from, EINA_FALSE);
+
+   l = eina_list_data_find_list(*from, data);
+   if (!l) return EINA_FALSE; /* should this be SAFETY_ON_NULL for a warning? */
+
+   *to = eina_list_append(*to, data);
+   *from = eina_list_remove_list(*from, l);
+   return EINA_TRUE;
+}
+
+/**
+ * @brief Move a list node from one list to another
+ *
+ * @param to The list to move the data to
+ * @param from The list to move from
+ * @param data The list node containing the data to move
+ * @return #EINA_TRUE on success, else #EINA_FALSE
+ *
+ * This function is a shortcut for doing the following:
+ * to = eina_list_append(to, data->data);
+ * from = eina_list_remove_list(from, data);
+ */
+EAPI Eina_Bool
+eina_list_move_list(Eina_List **to, Eina_List **from, Eina_List *data)
+{
+   EINA_SAFETY_ON_NULL_RETURN_VAL(to, EINA_FALSE);
+   EINA_SAFETY_ON_NULL_RETURN_VAL(from, EINA_FALSE);
+   
+   EINA_MAGIC_CHECK_LIST(*to, EINA_FALSE);
+   EINA_MAGIC_CHECK_LIST(*from, EINA_FALSE);
+   EINA_MAGIC_CHECK_LIST(data, EINA_FALSE);
+
+   *to = eina_list_append(*to, data->data);
+   *from = eina_list_remove_list(*from, data);
+   return EINA_TRUE;
+}
+
 /**
  * @brief Find a member of a list and return the list node containing that member.
  *