2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2007, 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 * parse.c: Parse an Empire command line
30 * Known contributors to this file:
37 #include "prototypes.h"
40 * Parse user command in BUF.
42 * Command name and arguments are copied into SPACE[], whose size must
43 * be at least strlen(BUF) + 1.
44 * Set ARG[0] to the zero-terminated command name.
45 * Set ARG[1..N] to the zero-terminated arguments, where N is the
46 * number of arguments. Set ARG[N+1..127] to NULL.
47 * Set TAIL[0..N] to beginning of ARG[0] in BUF[].
48 * If CONDP is not null, recognize conditional argument syntax, and
49 * set *CONDP to the conditional argument if present, else NULL.
50 * If REDIR is not null, recognize redirection syntax, and set *REDIR
51 * to UTF-8 redirection string if present, else NULL.
52 * Return number of slots used in ARG[], or -1 on error.
55 parse(char *buf, char *space, char **arg,
56 char **tail, char **condp, char **redir)
58 int i, quoted, argnum;
65 for (argnum = 0; argnum < 127;) {
66 for (; isspace(*(unsigned char *)buf); buf++) ;
70 /* recognize redirection syntax */
71 if (redir && (*buf == '>' || *buf == '|')) {
76 if (condp && *buf == '?') {
82 arg[argnum++] = space;
87 for (; *buf && (quoted || !isspace(*(unsigned char *)buf)); buf++) {
90 else if (*buf >= 0x20 && *buf <= 0x7e)
92 /* else funny character; ignore */
97 for (i = argnum; i < 128; i++) {