/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2006, Dave Pare, Jeff Bailey, Thomas Ruschak,
- * Ken Stevens, Steve McClure
+ * Copyright (C) 1986-2020, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Ken Stevens, Steve McClure, Markus Armbruster
*
- * This program is free software; you can redistribute it and/or modify
+ * Empire 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 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ---
*
* ---
*
* parse.c: Parse an Empire command line
- *
+ *
* Known contributors to this file:
- *
+ *
*/
#include <config.h>
#include <ctype.h>
-#include "misc.h"
-#include "gen.h"
+#include "prototypes.h"
/*
- * Parse user command in BUF.
- * BUF is UTF-8.
- * Set ARG[0] to point to the command name.
- * Set ARG[1..N] to point to arguments, where N is the number of
- * arguments. Set ARG[N+1..127] to NULL.
- * If *CONDP is not null, recognize conditional argument syntax, and
- * set *CONDP to the conditional argument if present, else NULL.
- * Command name and arguments are copied into SPACE[], whose size must
- * be at least strlen(BUF) + 1.
- * If *REDIR is not null, recognize redirection syntax, and set *REDIR
+ * Parse user command in @buf.
+ * @buf is UTF-8.
+ * Command name and arguments are copied into @space[], whose size must
+ * be at least strlen(@buf) + 1.
+ * Set @arg[0] to the zero-terminated command name.
+ * Set @arg[1..N] to the zero-terminated arguments, where N is the
+ * number of arguments. Set @arg[N+1..127] to NULL.
+ * Set @tail[0..N] to beginning of @arg[0] in @buf[].
+ * If @condp is not null, recognize conditional argument syntax, and
+ * set *@condp to the conditional argument if present, else NULL.
+ * If @redir is not null, recognize redirection syntax, and set *@redir
* to UTF-8 redirection string if present, else NULL.
- * Return number of slots used in ARG[], or -1 on error.
+ * Return number of slots used in @arg[], or -1 on error.
*/
int
-parse(char *buf, char **arg, char **condp, char *space, char **redir)
+parse(char *buf, char *space, char **arg,
+ char **tail, char **condp, char **redir)
{
- char *bp2;
- char *bp1 = space;
- int fs;
- int quoted;
- int argnum;
+ int i, quoted, argnum;
if (redir)
- *redir = 0;
- if (condp != NULL)
+ *redir = NULL;
+ if (condp)
*condp = NULL;
- for (argnum = 0; *buf && argnum < 127;) {
- while (isspace(*buf))
- buf++;
+
+ for (argnum = 0; argnum < 127;) {
+ for (; isspace(*(unsigned char *)buf); buf++) ;
if (!*buf)
break;
+
+ /* recognize redirection syntax */
if (redir && (*buf == '>' || *buf == '|')) {
*redir = buf;
break;
}
+
+ if (condp && *buf == '?') {
+ buf++;
+ *condp = space;
+ } else {
+ if (tail)
+ tail[argnum] = buf;
+ arg[argnum++] = space;
+ }
+
+ /* copy argument */
quoted = 0;
- for (bp2 = bp1; *buf;) {
- if (!quoted && isspace(*buf)) {
- buf++;
- break;
- }
- if (*buf == '"') {
+ for (; *buf && (quoted || !isspace(*(unsigned char *)buf)); buf++) {
+ if (*buf == '"')
quoted = !quoted;
- buf++;
- } else {
- if (*buf >= 0x20 && *buf <= 0x7e)
- *bp1++ = *buf++;
- else
- buf++;
- }
- }
- *bp1++ = 0;
- if (*bp2 == '?' && condp != NULL) {
- *condp = bp2 + 1;
- } else {
- arg[argnum] = bp2;
- argnum++;
+ else if ((*buf >= 0x20 && *buf <= 0x7e) || *buf == '\t')
+ *space++ = *buf;
+ /* else funny character; ignore */
}
+ *space++ = 0;
}
- for (fs = argnum; fs < 128; fs++)
- arg[fs] = NULL;
+
+ for (i = argnum; i < 128; i++) {
+ arg[i] = NULL;
+ if (tail)
+ tail[i] = NULL;
+ }
+
return argnum;
}