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/*
* $Id: ctkstack.c,v 1.4 2000/06/27 04:42:30 terpstra Exp $
*
* CTK - Console Toolkit
*
* Copyright (C) 1998-2000 Stormix Technologies Inc.
*
* License: LGPL
*
* Authors: Kevin Lindsay, Wesley Terpstra
*
* 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <glib.h>
#include "ctk.h"
GNode **focus_stack = NULL;
/* Get Number of items in stack */
gint stack_num_items(GNode **stack)
{
gint i;
if (!stack)
return 0;
for (i = 0; stack[i]; i += 1)
{
// noop
}
return i;
}
/* Push an item onto the stack */
gint stack_push(GNode *node)
{
gint num_items;
gint i;
if (!node) {
ctk_close();
g_error("stack_push: GNode *node == NULL!");
}
if (focus_stack == NULL)
{
focus_stack = g_malloc(sizeof(GNode *));
focus_stack[0] = NULL;
}
num_items = stack_num_items(focus_stack);
focus_stack = realloc(focus_stack,
sizeof(GNode *)*(num_items+2));
focus_stack[num_items+1] = NULL;
for (i = num_items; i > 0; i -= 1)
{
focus_stack[i] = focus_stack[i-1];
}
focus_stack[0] = node;
return 1;
}
/* Check if an item exists in the stack */
gint stack_item_exist(GNode *node)
{
gint i;
if (!node)
{
ctk_close();
g_error("stack_item_exist: GNode *node == NULL!");
}
if (!focus_stack)
return 0;
for (i = 0; focus_stack[i]; i += 1)
{
if (focus_stack[i] == node)
return 1;
}
return 0;
}
/* Pop an item from the stack.
* It may not necessarily be from the top either. */
gint stack_pop(GNode *node)
{
gint i;
if (!node)
{
ctk_close();
g_error("stack_pop: GNode *node == NULL!");
}
if (!focus_stack)
return 0;
for (i = 0; focus_stack[i]; i += 1)
{
if (focus_stack[i] == node)
break;
}
if (!focus_stack[i])
return 0;
for (i += 1; focus_stack[i]; i += 1) {
focus_stack[i-1] = focus_stack[i];
}
focus_stack[i-1] = NULL;
return 1;
}
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