/*
* Empire - A multi-player, client/server Internet based war game.
- * Copyright (C) 1986-2000, Dave Pare, Jeff Bailey, Thomas Ruschak,
+ * Copyright (C) 1986-2008, Dave Pare, Jeff Bailey, Thomas Ruschak,
* Ken Stevens, Steve McClure
*
* This program is free software; you can redistribute it and/or modify
*
* ---
*
- * See the "LEGAL", "LICENSE", "CREDITS" and "README" files for all the
- * related information and legal notices. It is expected that any future
- * projects/authors will amend these files as needed.
+ * 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.
*
* ---
*
* snxtsct.c: Arrange sector selection using either distance or area
- *
+ *
* Known contributors to this file:
* Dave Pare, 1989
+ * Markus Armbruster, 2006-2008
*/
+#include <config.h>
+
+#include "file.h"
#include "misc.h"
-#include "player.h"
-#include "var.h"
-#include "xy.h"
-#include "sect.h"
+#include "nat.h"
#include "nsc.h"
-#include "file.h"
-#include "com.h"
-#include "prototypes.h"
#include "optlist.h"
+#include "player.h"
+#include "prototypes.h"
+#include "xy.h"
/*
* setup the nstr_sect structure for sector selection.
* can select on either NS_ALL, NS_AREA, or NS_RANGE
* iterate thru the "condarg" string looking
* for arguments to compile into the nstr.
+ * Using this function for anything but command arguments is usually
+ * incorrect, because it respects conditionals. Use the snxtsct_FOO()
+ * instead.
*/
int
-snxtsct(register struct nstr_sect *np, s_char *str)
+snxtsct(struct nstr_sect *np, char *str)
{
- register s_char *cp;
- struct range range;
- coord cx, cy;
- int dist;
- s_char buf[1024];
- struct range wr;
+ struct range range;
+ struct natstr *natp;
+ coord cx, cy;
+ int dist, n;
+ char buf[1024];
- if (str == 0 || *str == 0) {
- if ((str = getstring("(sects)? ", buf)) == 0)
- return 0;
- }
- wr.lx = -WORLD_X/2;
- wr.ly = -WORLD_Y/2;
- wr.hx = WORLD_X/2;
- wr.hy = WORLD_Y/2;
- wr.width = wr.height = 0;
- switch (sarg_type(str)) {
- case NS_AREA:
- if (!sarg_area(str, &range))
- return 0;
- snxtsct_area(np, &range);
- break;
- case NS_DIST:
- if (!sarg_range(str, &cx, &cy, &dist))
- return 0;
- snxtsct_dist(np, cx, cy, dist);
- break;
- case NS_ALL:
- /* fake "all" by doing a world-sized area query */
- snxtsct_area(np, &wr);
- break;
- default:
- return 0;
- }
- if (player->condarg == 0)
- return 1;
- cp = player->condarg;
- while ((cp = nstr_comp(np->cond, &np->ncond, EF_SECTOR, cp)) && *cp)
- ;
- if (cp == 0)
- return 0;
+ if (str == 0 || *str == 0) {
+ if ((str = getstring("(sects)? ", buf)) == 0)
+ return 0;
+ }
+ switch (sarg_type(str)) {
+ case NS_AREA:
+ if (!sarg_area(str, &range))
+ return 0;
+ snxtsct_area(np, &range);
+ break;
+ case NS_DIST:
+ if (!sarg_range(str, &cx, &cy, &dist))
+ return 0;
+ snxtsct_dist(np, cx, cy, dist);
+ break;
+ case NS_ALL:
+ /*
+ * Can't use snxtsct_all(), as it would disclose the real
+ * origin. Use a world-sized area instead.
+ */
+ natp = getnatp(player->cnum);
+ range.lx = xabs(natp, -WORLD_X / 2);
+ range.ly = yabs(natp, -WORLD_Y / 2);
+ range.hx = xnorm(range.lx + WORLD_X - 1);
+ range.hy = ynorm(range.ly + WORLD_Y - 1);
+ xysize_range(&range);
+ snxtsct_area(np, &range);
+ break;
+ default:
+ return 0;
+ }
+ if (player->condarg == 0)
return 1;
+ n = nstr_comp(np->cond, sizeof(np->cond) / sizeof(*np->cond),
+ EF_SECTOR, player->condarg);
+ np->ncond = n >= 0 ? n : 0;
+ return n >= 0;
+}
+
+void
+snxtsct_all(struct nstr_sect *np)
+{
+ struct range worldrange;
+
+ worldrange.lx = 0;
+ worldrange.ly = 0;
+ worldrange.hx = WORLD_X - 1;
+ worldrange.hy = WORLD_Y - 1;
+ xysize_range(&worldrange);
+ snxtsct_area(np, &worldrange);
+}
+
+void
+snxtsct_area(struct nstr_sect *np, struct range *range)
+{
+ memset(np, 0, sizeof(*np));
+ np->range = *range;
+ np->ncond = 0;
+ np->type = NS_AREA;
+ np->x = np->range.lx - 1;
+ np->y = np->range.ly;
+ np->dx = -1;
+ np->dy = 0;
+}
+
+void
+snxtsct_rewind(struct nstr_sect *np)
+{
+ np->x = np->range.lx - 1;
+ np->y = np->range.ly;
+ np->dx = -1;
+ np->dy = 0;
+ np->id = -1;
+}
+
+void
+snxtsct_dist(struct nstr_sect *np, coord cx, coord cy, int dist)
+{
+ memset(np, 0, sizeof(*np));
+ xydist_range(cx, cy, dist, &np->range);
+ np->cx = cx;
+ np->cy = cy;
+ np->ncond = 0;
+ np->dist = dist;
+ np->type = NS_DIST;
+ np->x = np->range.lx - 1;
+ np->y = np->range.ly;
+ np->dx = -1;
+ np->dy = 0;
+}
+
+void
+xysize_range(struct range *rp)
+{
+ if (rp->lx > rp->hx)
+ rp->width = WORLD_X + rp->hx + 1 - rp->lx;
+ else
+ rp->width = rp->hx + 1 - rp->lx;
+ if (CANT_HAPPEN(rp->width > WORLD_X))
+ rp->width = WORLD_X;
+ if (rp->ly > rp->hy)
+ rp->height = WORLD_Y + rp->hy + 1 - rp->ly;
+ else
+ rp->height = rp->hy + 1 - rp->ly;
+ if (CANT_HAPPEN(rp->height > WORLD_Y))
+ rp->height = WORLD_Y;
+}
+
+void
+xydist_range(coord x, coord y, int dist, struct range *rp)
+{
+ if (4 * dist + 1 < WORLD_X) {
+ rp->lx = xnorm(x - 2 * dist);
+ rp->hx = xnorm(x + 2 * dist);
+ rp->width = 4 * dist + 1;
+ } else {
+ rp->lx = xnorm(x - WORLD_X / 2);
+ rp->hx = xnorm(rp->lx + WORLD_X - 1);
+ rp->width = WORLD_X;
+ }
+
+ if (2 * dist + 1 < WORLD_Y) {
+ rp->ly = ynorm(y - dist);
+ rp->hy = ynorm(y + dist);
+ rp->height = 2 * dist + 1;
+ } else {
+ rp->ly = ynorm(y - WORLD_Y / 2);
+ rp->hy = ynorm(rp->ly + WORLD_Y - 1);
+ rp->height = WORLD_Y;
+ }
}
-/*
- * The rest of these (snxtsct_all, snxtsct_area, etc, have been moved
- * into the common lib, since they don't use condargs, and are useful
- * elsewhere (update, chiefly). ---ts
- *
- */
projects / empserver / blobdiff