empserver/src/lib/subs/whatitem.c
Markus Armbruster 6ae4eca045 Don't use 0 as null pointer constant, part 3
This part replaces E == 0 by !E, where E has pointer type.
2009-03-24 21:46:01 +01:00

73 lines
2 KiB
C

/*
* Empire - A multi-player, client/server Internet based war game.
* Copyright (C) 1986-2009, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program 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
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* 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
*
* ---
*
* See files README, COPYING and CREDITS in the root of the source
* tree for related information and legal notices. It is expected
* that future projects/authors will amend these files as needed.
*
* ---
*
* whatitem.c: Return pointer to item chr struct given an item name
*
* Known contributors to this file:
*
*/
#include <config.h>
#include "prototypes.h"
/*
* Get item type argument.
* If INPUT is not empty, use it, else prompt for more input using PROMPT.
* Return item characteristics on success, else NULL.
*/
struct ichrstr *
whatitem(char *input, char *prompt)
{
char *p;
struct ichrstr *ip;
char buf[1024];
p = getstarg(input, prompt, buf);
if (!p || !*p)
return NULL;
ip = item_by_name(p);
if (!ip)
pr("Unrecognized item \"%c\"\n", *p);
return ip;
}
/*
* Map item type name STR to item characteristics, NULL if not found.
*/
struct ichrstr *
item_by_name(char *str)
{
struct ichrstr *ip;
for (ip = ichr; ip->i_mnem != 0; ip++) {
/* FIXME check i_name if str[2]? */
if (*str == ip->i_mnem)
return ip;
}
return NULL;
}