gtk/glib/glist.c
Manish Singh 89a5c21c07 The list sort functions compared things backwards. Fixed.
The list iterator macros now check for NULL args

-Yosh
1998-01-29 08:00:28 +00:00

418 lines
7.3 KiB
C

/* 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;
GList *free_list;
};
static GRealListAllocator *default_allocator = NULL;
static GRealListAllocator *current_allocator = NULL;
GListAllocator*
g_list_allocator_new ()
{
GRealListAllocator* allocator = g_new (GRealListAllocator, 1);
allocator->list_mem_chunk = NULL;
allocator->free_list = NULL;
return (GListAllocator*) allocator;
}
void
g_list_allocator_free (GListAllocator* fallocator)
{
GRealListAllocator* allocator = (GRealListAllocator *) fallocator;
if (allocator && allocator->list_mem_chunk)
g_mem_chunk_destroy (allocator->list_mem_chunk);
if (allocator)
g_free (allocator);
}
GListAllocator*
g_list_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 ("list mem chunk",
sizeof (GList),
1024,
G_ALLOC_ONLY);
return (GListAllocator*) (old_allocator == default_allocator ? NULL : old_allocator);
}
GList*
g_list_alloc ()
{
GList *new_list;
g_list_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 (GList, current_allocator->list_mem_chunk);
}
new_list->data = NULL;
new_list->next = NULL;
new_list->prev = NULL;
return new_list;
}
void
g_list_free (GList *list)
{
GList *last;
if (list)
{
last = g_list_last (list);
last->next = current_allocator->free_list;
current_allocator->free_list = list;
}
}
void
g_list_free_1 (GList *list)
{
if (list)
{
list->next = current_allocator->free_list;
current_allocator->free_list = list;
}
}
GList*
g_list_append (GList *list,
gpointer data)
{
GList *new_list;
GList *last;
new_list = g_list_alloc ();
new_list->data = data;
if (list)
{
last = g_list_last (list);
/* g_assert (last != NULL); */
last->next = new_list;
new_list->prev = last;
return list;
}
else
return new_list;
}
GList*
g_list_prepend (GList *list,
gpointer data)
{
GList *new_list;
new_list = g_list_alloc ();
new_list->data = data;
if (list)
{
if (list->prev)
{
list->prev->next = new_list;
new_list->prev = list->prev;
}
list->prev = new_list;
new_list->next = list;
}
return new_list;
}
GList*
g_list_insert (GList *list,
gpointer data,
gint position)
{
GList *new_list;
GList *tmp_list;
if (position < 0)
return g_list_append (list, data);
else if (position == 0)
return g_list_prepend (list, data);
tmp_list = g_list_nth (list, position);
if (!tmp_list)
return g_list_append (list, data);
new_list = g_list_alloc ();
new_list->data = data;
if (tmp_list->prev)
{
tmp_list->prev->next = new_list;
new_list->prev = tmp_list->prev;
}
new_list->next = tmp_list;
tmp_list->prev = new_list;
if (tmp_list == list)
return new_list;
else
return list;
}
GList *
g_list_concat (GList *list1, GList *list2)
{
GList *tmp_list;
if (list2)
{
tmp_list = g_list_last (list1);
if (tmp_list)
tmp_list->next = list2;
else
list1 = list2;
list2->prev = tmp_list;
}
return list1;
}
GList*
g_list_remove (GList *list,
gpointer data)
{
GList *tmp;
tmp = list;
while (tmp)
{
if (tmp->data != data)
tmp = tmp->next;
else
{
if (tmp->prev)
tmp->prev->next = tmp->next;
if (tmp->next)
tmp->next->prev = tmp->prev;
if (list == tmp)
list = list->next;
g_list_free_1 (tmp);
break;
}
}
return list;
}
GList*
g_list_remove_link (GList *list,
GList *link)
{
if (link)
{
if (link->prev)
link->prev->next = link->next;
if (link->next)
link->next->prev = link->prev;
if (link == list)
list = list->next;
link->next = NULL;
link->prev = NULL;
}
return list;
}
GList*
g_list_reverse (GList *list)
{
GList *last;
last = NULL;
while (list)
{
last = list;
list = last->next;
last->next = last->prev;
last->prev = list;
}
return last;
}
GList*
g_list_nth (GList *list,
gint n)
{
while ((n-- > 0) && list)
list = list->next;
return list;
}
GList*
g_list_find (GList *list,
gpointer data)
{
while (list)
{
if (list->data == data)
break;
list = list->next;
}
return list;
}
GList*
g_list_last (GList *list)
{
if (list)
{
while (list->next)
list = list->next;
}
return list;
}
GList*
g_list_first (GList *list)
{
if (list)
{
while (list->prev)
list = list->prev;
}
return list;
}
gint
g_list_length (GList *list)
{
gint length;
length = 0;
while (list)
{
length++;
list = list->next;
}
return length;
}
void
g_list_foreach (GList *list,
GFunc func,
gpointer user_data)
{
while (list)
{
(*func) (list->data, user_data);
list = list->next;
}
}
GList*
g_list_insert_sorted (GList *list,
gpointer data,
GCompareFunc func)
{
GList *tmp_list = list;
GList *new_list;
gint cmp;
if (!list)
{
new_list = g_list_alloc();
new_list->data = data;
return new_list;
}
cmp = (*func) (data, tmp_list->data);
while ((tmp_list->next) && (cmp > 0))
{
tmp_list = tmp_list->next;
cmp = (*func) (data, tmp_list->data);
}
if (cmp == 0)
return list;
new_list = g_list_alloc();
new_list->data = data;
if ((!tmp_list->next) && (cmp > 0))
{
tmp_list->next = new_list;
new_list->prev = tmp_list;
return list;
}
if (tmp_list->prev)
{
tmp_list->prev->next = new_list;
new_list->prev = tmp_list->prev;
}
new_list->next = tmp_list;
tmp_list->prev = new_list;
if (tmp_list == list)
return new_list;
else
return list;
}