101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
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* Empire - A multi-player, client/server Internet based war game.
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* Copyright (C) 1986-2005, Dave Pare, Jeff Bailey, Thomas Ruschak,
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* Ken Stevens, Steve McClure
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ---
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*
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* See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
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* related information and legal notices. It is expected that any future
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* projects/authors will amend these files as needed.
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*
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* ---
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*
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* parse.c: Parse an Empire command line
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*
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* Known contributors to this file:
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*
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*/
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#include <ctype.h>
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#include "misc.h"
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#include "gen.h"
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/*
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* Parse user command in BUF.
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* BUF is UTF-8.
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* Set ARG[0] to point to the command name.
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* Set ARG[1..N] to point to arguments, where N is the number of
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* arguments. Set ARG[N+1..127] to NULL.
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* If *CONDP is not null, recognize conditional argument syntax, and
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* set *CONDP to the conditional argument if present, else NULL.
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* Command name and arguments are copied into SPACE[], whose size must
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* be at least strlen(BUF) + 1.
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* If *REDIR is not null, recognize redirection syntax, and set *REDIR
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* to UTF-8 redirection string if present, else NULL.
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* Return number of slots used in ARG[], or -1 on error.
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*/
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int
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parse(char *buf, char **arg, char **condp, char *space, char **redir)
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{
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char *bp2;
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char *bp1 = space;
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int fs;
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int quoted;
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int argnum;
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if (redir)
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*redir = 0;
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if (condp != NULL)
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*condp = NULL;
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for (argnum = 0; *buf && argnum < 127;) {
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while (isspace(*buf))
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buf++;
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if (!*buf)
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break;
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if (redir && (*buf == '>' || *buf == '|')) {
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*redir = buf;
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break;
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}
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quoted = 0;
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for (bp2 = bp1; *buf;) {
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if (!quoted && isspace(*buf)) {
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buf++;
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break;
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}
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if (*buf == '"') {
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quoted = !quoted;
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buf++;
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} else {
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if (*buf >= 0x20 && *buf <= 0x7e)
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*bp1++ = *buf++;
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else
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buf++;
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}
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}
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*bp1++ = 0;
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if (*bp2 == '?' && condp != NULL) {
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*condp = bp2 + 1;
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} else {
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arg[argnum] = bp2;
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argnum++;
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}
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}
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for (fs = argnum; fs < 128; fs++)
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arg[fs] = NULL;
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return argnum;
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}
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