Initial revision

glib/gslist.c

@@ -0,0 +1,324 @@
+/* GLIB - Library of useful routines for C programming
+ * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include "glib.h"
+
+
+typedef struct _GRealListAllocator GRealListAllocator;
+
+struct _GRealListAllocator
+{
+  GMemChunk *list_mem_chunk;
+  GSList    *free_list;
+};
+
+
+static GRealListAllocator *default_allocator = NULL;
+static GRealListAllocator *current_allocator = NULL;
+
+GListAllocator*
+g_slist_set_allocator (GListAllocator* fallocator)
+{
+  GRealListAllocator* allocator = (GRealListAllocator *) fallocator;
+  GRealListAllocator* old_allocator = current_allocator;
+
+  if (allocator)
+    current_allocator = allocator;
+  else
+    {
+      if (!default_allocator)
+	default_allocator = (GRealListAllocator*) g_list_allocator_new ();
+      current_allocator = default_allocator;
+    }
+
+  if (!current_allocator->list_mem_chunk)
+    current_allocator->list_mem_chunk = g_mem_chunk_new ("slist mem chunk",
+							 sizeof (GSList),
+							 1024,
+							 G_ALLOC_ONLY);
+
+  return (GListAllocator*) (old_allocator == default_allocator ? NULL : old_allocator);
+}
+
+
+GSList*
+g_slist_alloc ()
+{
+  GSList *new_list;
+
+  g_slist_set_allocator (NULL);
+  if (current_allocator->free_list)
+    {
+      new_list = current_allocator->free_list;
+      current_allocator->free_list = current_allocator->free_list->next;
+    }
+  else
+    {
+      new_list = g_chunk_new (GSList, current_allocator->list_mem_chunk);
+    }
+
+  new_list->data = NULL;
+  new_list->next = NULL;
+
+  return new_list;
+}
+
+void
+g_slist_free (GSList *list)
+{
+  GSList *last;
+
+  if (list)
+    {
+      last = g_slist_last (list);
+      last->next = current_allocator->free_list;
+      current_allocator->free_list = list;
+    }
+}
+
+void
+g_slist_free_1 (GSList *list)
+{
+  if (list)
+    {
+      list->next = current_allocator->free_list;
+      current_allocator->free_list = list;
+    }
+}
+
+GSList*
+g_slist_append (GSList   *list,
+		gpointer  data)
+{
+  GSList *new_list;
+  GSList *last;
+
+  new_list = g_slist_alloc ();
+  new_list->data = data;
+
+  if (!list)
+    {
+      list = new_list;
+    }
+  else
+    {
+      last = g_slist_last (list);
+      g_assert (last != NULL);
+      last->next = new_list;
+    }
+
+  return list;
+}
+
+GSList*
+g_slist_prepend (GSList   *list,
+		 gpointer  data)
+{
+  GSList *new_list;
+
+  new_list = g_slist_alloc ();
+  new_list->data = data;
+  new_list->next = list;
+
+  return new_list;
+}
+
+GSList*
+g_slist_insert (GSList   *list,
+		gpointer  data,
+		gint      position)
+{
+  GSList *prev_list;
+  GSList *tmp_list;
+  GSList *new_list;
+
+  prev_list = NULL;
+  tmp_list = list;
+
+  while (tmp_list && (position-- > 0))
+    {
+      prev_list = tmp_list;
+      tmp_list = tmp_list->next;
+    }
+
+  if (!tmp_list && !prev_list)
+    return list;
+
+  new_list = g_slist_alloc ();
+
+  if (!prev_list)
+    {
+      new_list->next = list;
+      list = new_list;
+    }
+  else
+    {
+      new_list->next = prev_list->next;
+      prev_list->next = new_list;
+    }
+
+  return list;
+}
+
+GSList*
+g_slist_remove (GSList   *list,
+		gpointer  data)
+{
+  GSList *tmp;
+  GSList *prev;
+
+  prev = NULL;
+  tmp = list;
+
+  while (tmp)
+    {
+      if (tmp->data == data)
+	{
+	  if (prev)
+	    prev->next = tmp->next;
+	  if (list == tmp)
+	    list = list->next;
+
+	  tmp->next = NULL;
+	  g_slist_free (tmp);
+
+	  break;
+	}
+
+      prev = tmp;
+      tmp = tmp->next;
+    }
+
+  return list;
+}
+
+GSList*
+g_slist_remove_link (GSList *list,
+		     GSList *link)
+{
+  GSList *tmp;
+  GSList *prev;
+
+  prev = NULL;
+  tmp = list;
+
+  while (tmp)
+    {
+      if (tmp == link)
+	{
+	  if (prev)
+	    prev->next = tmp->next;
+	  if (list == tmp)
+	    list = list->next;
+
+	  tmp->next = NULL;
+	  break;
+	}
+
+      prev = tmp;
+      tmp = tmp->next;
+    }
+
+  return list;
+}
+
+GSList*
+g_slist_reverse (GSList *list)
+{
+  GSList *tmp;
+  GSList *prev;
+  GSList *last;
+
+  last = NULL;
+  prev = NULL;
+
+  while (list)
+    {
+      last = list;
+
+      tmp = list->next;
+      list->next = prev;
+
+      prev = list;
+      list = tmp;
+    }
+
+  return last;
+}
+
+GSList*
+g_slist_nth (GSList *list,
+	     gint    n)
+{
+  while ((n-- > 0) && list)
+    list = list->next;
+
+  return list;
+}
+
+GSList*
+g_slist_find (GSList   *list,
+	      gpointer  data)
+{
+  while (list)
+    {
+      if (list->data == data)
+	break;
+      list = list->next;
+    }
+
+  return list;
+}
+
+GSList*
+g_slist_last (GSList *list)
+{
+  if (list)
+    {
+      while (list->next)
+	list = list->next;
+    }
+
+  return list;
+}
+
+gint
+g_slist_length (GSList *list)
+{
+  gint length;
+
+  length = 0;
+  while (list)
+    {
+      length++;
+      list = list->next;
+    }
+
+  return length;
+}
+
+void
+g_slist_foreach (GSList   *list,
+		 GFunc     func,
+		 gpointer  user_data)
+{
+  while (list)
+    {
+      (*func) (list->data, user_data);
+      list = list->next;
+    }
+}