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/* wrapper/plugin-depend.c -- load a command dependancy tree
system depends: <string.h> <error.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>
#include <error.h>
#include "rvs.h"
#include "plugin-find.h"
#include "plugin-depend.h"
/* translates a string in format `plugin/command' into a pointer to the command
DON'T plan on using the string again, it will be mutilated!
(so we go ahead and free() it and set the pointer to NULL) */
struct plugin_command *
plugin_depend_parse (char **string,
struct plugin *plugins,
struct plugin_command *root)
{
struct plugin_command *command=NULL;
if (*string==NULL)
command=root;
else {
/* *string is in the format `plugin/command' */
/* char *del=delimeter */
char *del=strchr(*string,'/');
del[0]='\0';
/* *string = PLUGIN_NAME */
/* &del[1] = COMMAND_NAME */
struct plugin *plugin;
plugin =plugin_find_plugin(plugins, *string );
if (plugin==NULL)
error(EXIT_FAILURE,0,"cannot find plugin `%s'",*string);
command=plugin_find_plugin_command(plugin->commands, &del[1] );
if (command==NULL)
error(EXIT_FAILURE,0,
"plugin `%s' does not contain command `%s'",
*string,&del[1]);
xfree(*string);
*string=NULL;
}
return command;
}
/* used by plugin_depend_add */
void
_plugin_depend_add (struct plugin_command *prev,
struct plugin_command *next)
{
if (prev->d_next==NULL) {
prev->d_next=next;
} else {
_plugin_depend_add(prev->d_next,next);
}
}
/* plugin_depend_add(depend,depender) */
void
plugin_depend_add (struct plugin_command *depend,
struct plugin_command *depender)
{
if (depend->d_child==NULL) {
depend->d_child=depender;
} else {
_plugin_depend_add(depend->d_child,depender);
}
}
/* take care of depends for `command' */
void
plugin_depend_command (struct plugin_command *command,
struct plugin *plugins,
struct plugin_command *root, int ind)
{
if (command!=NULL) {
if (command->depend == NULL) {
/* the depend still needs to be parsed */
command->depend=plugin_depend_parse(
&(command->depends),plugins,root);
}
plugin_depend_add(command->depend,command);
}
}
/* take care of commands for a `plugin', and those after it (linked list) */
void
plugin_depend_plugin_all (struct plugin *plugin,
struct plugin *plugins,
struct plugin_command *root)
{
plugin_depend_command(plugin->commands,plugins,root,0);
if (plugin->next != NULL) {
plugin_depend_plugin_all(plugin->next,plugins,root);
}
}
/* take care of all depends */
struct plugin_command *
plugin_depend_all (struct plugin *plugins)
{
struct plugin_command *root=plugin_mk_command();
plugin_depend_plugin_all(plugins,plugins,root);
return root;
}
void
_plugin_depend_list (struct plugin_command_list *commands,
struct plugin *plugins,
struct plugin_command *root,int ind)
{
if (commands!=NULL) {
plugin_depend_command(commands->command,plugins,root,ind++);
_plugin_depend_list(commands->next,plugins,root,ind++);
}
}
struct plugin_command *
plugin_depend_list (struct plugin_command_list *commands,
struct plugin *plugins)
{
struct plugin_command *root=plugin_mk_command();
_plugin_depend_list(commands,plugins,root,0);
return root;
}
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