/* wrapper/plugin-find.h -- search functions for rvs plugins
   system depends: <string.h>
   Copyright (C) 2009 Luke Shumaker
   
   This file is part of rvs.
   
   rvs is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your
   option) any later version.
   
   rvs 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 General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with rvs; see the file COPYING.
   If not, write to the Free Software Foundation,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include <string.h> /* only uses `strcmp' */

#include "rvs.h"
#include "plugins.h"

#include "plugin-find.h"

/* returns first plugin with `name' (duplicates are... unwise) */
struct plugin *
plugin_find_plugin(struct plugin *node, char *name)
{
	
	if (node==NULL)
		return node;
	else {
		if (strcmp(node->name,name) == 0)
			return node;
		else
			return plugin_find_plugin(node->next,name);
	}
}

/* returns plugin `name within plugin `node' */ 
struct plugin_command *
plugin_find_plugin_command(struct plugin_command *node, char *name)
{
	if (node==NULL)
		return node;
	else {
		if (strcmp(node->name,name) == 0)
			return node;
		else
			return plugin_find_plugin_command(node->next,name);
	}
}

/* returns the first command with `name' it finds */
struct plugin_command *
plugin_find_command(struct plugin *plugin, char *name)
{
	if (plugin==NULL)
		return NULL;
	else {
		struct plugin_command *ret;
		ret=plugin_find_plugin_command(plugin->commands,name);
		if (ret == NULL)
			ret=plugin_find_command(plugin->next,name);
		return ret;
	}
}

/* returns a linked list of all commands with `name' it finds */
struct plugin_command_list *
plugin_find_commands(struct plugin *plugin, char *name)
{
	if (plugin==NULL)
		return NULL;
	else {
		struct plugin_command *command;
		command=plugin_find_command(plugin,name);
		struct plugin_command_list *node;
		if (command==NULL)
			node=plugin_find_commands(plugin->next,name);
		else {
			node=xmalloc( sizeof *node );
			node->command=command;
			node->next=plugin_find_commands(plugin->next,name);
		}
		return node;
	}
}

void
plugin_free_list(struct plugin_command_list *node)
{
	if (node!=NULL) {
		plugin_free_list(node->next);
		xfree(node);
	}
}