2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2009, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * dispatch.c: Actually execute the command given
30 * Known contributors to this file:
33 * Markus Armbruster, 2007
48 #include "prototypes.h"
52 * Execute command named by player->argp[0].
53 * BUF is the raw UTF-8 command line. It should have been passed to
54 * parse() to set up player->argp.
55 * If REDIR is not null, it's the command's redirection, in UTF-8.
56 * Return -1 if the command is not unique or doesn't exist, else 0.
59 dispatch(char *buf, char *redir)
62 struct cmndstr *command;
65 cmd = comtch(player->argp[0], player_coms, player->nstat);
67 if (cmd == M_NOTUNIQUE)
68 pr("Command \"%s\" is ambiguous -- ", player->argp[0]);
69 else if (cmd == M_IGNORE)
72 pr("\"%s\" is not a legal command\n", player->argp[0]);
75 command = &player_coms[cmd];
76 np = getnatp(player->cnum);
77 if (np->nat_btu < command->c_cost && command->c_cost > 0) {
78 if (player->god || opt_BLITZ)
79 np->nat_btu = max_btus;
81 pr("You don't have the BTU's, bozo\n");
85 if (command->c_addr == 0) {
86 pr("Command not implemented\n");
90 * Rwlocks can hand out read locks while a write lock is wanted.
91 * Unfair to writers, but possible. This lets commands run with
92 * !player->aborted, which can then block on input and thus delay
93 * the update indefinitely. We could avoid that by setting
94 * player->aborted here, but spinning until the update is done is
97 while (play_wrlock_wanted)
99 player->command = command;
100 empth_rwlock_rdlock(play_lock);
106 journal_command(command->c_form);
107 switch (command->c_addr()) {
109 player->btused += command->c_cost;
112 pr("command failed\n");
113 player->btused += command->c_cost;
116 pr("Usage: %s\n", command->c_form);
122 empth_rwlock_unlock(play_lock);
123 player->command = NULL;