2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2021, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire 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 3 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, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * dispatch.c: Actually execute the command given
29 * Known contributors to this file:
32 * Markus Armbruster, 2007-2014
46 #include "prototypes.h"
50 * Last command's PRNG seed.
51 * Only used when running_test_suite.
53 int test_suite_prng_seed;
56 * Execute command named by player->argp[0].
57 * @buf is the raw UTF-8 command line. It should have been passed to
58 * parse() to set up player->argp.
59 * If @redir is not null, it's the command's redirection, in UTF-8.
60 * Return -1 if the command is not unique or doesn't exist, else 0.
63 dispatch(char *buf, char *redir)
66 struct cmndstr *command;
69 cmd = comtch(player->argp[0], player_coms, player->nstat);
71 if (cmd == M_NOTUNIQUE)
72 pr("Command \"%s\" is ambiguous -- ", player->argp[0]);
73 else if (cmd == M_IGNORE)
76 pr("\"%s\" is not a legal command\n", player->argp[0]);
79 command = &player_coms[cmd];
81 np = getnatp(player->cnum);
82 if (np->nat_btu < command->c_cost && command->c_cost > 0) {
83 if (player->god || opt_BLITZ)
84 np->nat_btu = max_btus;
86 pr("You don't have the BTUs, bozo\n");
90 if (!command->c_addr) {
91 pr("Command not implemented\n");
94 player->may_sleep = command->c_flags & C_MOD
95 ? PLAYER_SLEEP_ON_INPUT : PLAYER_SLEEP_FREELY;
96 player->command = command;
97 empth_rwlock_rdlock(update_lock);
100 * When running the test suite, reseed PRNG for each command with
101 * a counter, to keep results stable even when the number of PRNs
103 * Tests can adjust the counter with "__cmd added ...", to
104 * keep the results stable when commands are inserted or deleted.
106 test_suite_prng_seed += !(command->c_permit & TESTING);
107 if (running_test_suite)
108 seed_prng(test_suite_prng_seed);
115 journal_command(command->c_form);
116 switch (command->c_addr()) {
118 player->btused += command->c_cost;
121 pr("command failed\n");
122 player->btused += command->c_cost;
125 pr("Usage: %s\n", command->c_form);
132 empth_rwlock_unlock(update_lock);
133 player->command = NULL;
134 if (player->may_sleep != PLAYER_SLEEP_NEVER || !io_eof(player->iop))
135 player->may_sleep = PLAYER_SLEEP_FREELY;
136 /* else we're being kicked out */