/* $OpenBSD: dr_2.c,v 1.4 2003/06/03 03:01:41 millert Exp $ */ /* $NetBSD: dr_2.c,v 1.4 1995/04/24 12:25:12 cgd Exp $ */ /* * Copyright (c) 1983, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint #if 0 static char sccsid[] = "@(#)dr_2.c 8.1 (Berkeley) 5/31/93"; #else static char rcsid[] = "$OpenBSD: dr_2.c,v 1.4 2003/06/03 03:01:41 millert Exp $"; #endif #endif /* not lint */ #include "driver.h" #include <stdlib.h> #define couldwin(f,t) (f->specs->crew2 > t->specs->crew2 * 1.5) void thinkofgrapples() { struct ship *sp, *sq; char friendly; foreachship(sp) { if (sp->file->captain[0] || sp->file->dir == 0) continue; foreachship(sq) { friendly = sp->nationality == capship(sq)->nationality; if (!friendly) { if (sp->file->struck || sp->file->captured != 0) continue; if (range(sp, sq) != 1) continue; if (grappled2(sp, sq)) { if (is_toughmelee(sp, sq, 0, 0)) ungrap(sp, sq); else grap(sp, sq); } else if (couldwin(sp, sq)) { grap(sp, sq); sp->file->loadwith = L_GRAPE; } } else ungrap(sp, sq); } } } void checkup() { struct ship *sp, *sq; char explode, sink; foreachship(sp) { if (sp->file->dir == 0) continue; explode = sp->file->explode; sink = sp->file->sink; if (explode != 1 && sink != 1) continue; if (die() < 5) continue; Write(sink == 1 ? W_SINK : W_EXPLODE, sp, 2, 0, 0, 0); Write(W_DIR, sp, 0, 0, 0, 0); if (snagged(sp)) foreachship(sq) cleansnag(sp, sq, 1); if (sink != 1) { makemsg(sp, "exploding!"); foreachship(sq) { if (sp != sq && sq->file->dir && range(sp, sq) < 4) table(RIGGING, L_EXPLODE, sp->specs->guns/13, sq, sp, 6); } } else makemsg(sp, "sinking!"); } } void prizecheck() { struct ship *sp; foreachship(sp) { if (sp->file->captured == 0) continue; if (sp->file->struck || sp->file->dir == 0) continue; if (sp->specs->crew1 + sp->specs->crew2 + sp->specs->crew3 > sp->file->pcrew * 6) { Writestr(W_SIGNAL, sp, "prize crew overthrown"); Write(W_POINTS, sp->file->captured, sp->file->captured->file->points - 2 * sp->specs->pts, 0, 0, 0); Write(W_CAPTURED, sp, -1, 0, 0, 0); } } } int str_end(str) const char *str; { const char *p; for (p = str; *p; p++) ; return p == str ? 0 : p[-1]; } void closeon(from, to, command, commandl, ta, ma, af) struct ship *from, *to; char command[]; size_t commandl; int ma, ta, af; { int high; char temp[10]; temp[0] = command[0] = '\0'; high = -30000; try(command, commandl, temp, sizeof temp, ma, ta, af, ma, from->file->dir, from, to, &high, 0); } const int dtab[] = {0,1,1,2,3,4,4,5}; /* diagonal distances in x==y */ int score(movement, movementl, ship, to, onlytemp) char movement[]; size_t movementl; struct ship *ship, *to; char onlytemp; { char drift; int row, col, dir, total, ran; struct File *fp = ship->file; if ((dir = fp->dir) == 0) return 0; row = fp->row; col = fp->col; drift = fp->drift; move_ship(movement, ship, &fp->dir, &fp->row, &fp->col, &drift); if (!*movement) (void) strlcpy(movement, "d", movementl); ran = range(ship, to); total = -50 * ran; if (ran < 4 && gunsbear(ship, to)) total += 60; if ((ran = portside(ship, to, 1) - fp->dir) == 4 || ran == -4) total = -30000; if (!onlytemp) { fp->row = row; fp->col = col; fp->dir = dir; } return total; } void move_ship(p, ship, dir, row, col, drift) const char *p; struct ship *ship; unsigned char *dir; short *row, *col; char *drift; { int dist; char moved = 0; for (; *p; p++) { switch (*p) { case 'r': if (++*dir == 9) *dir = 1; break; case 'l': if (--*dir == 0) *dir = 8; break; case '1': case '2': case '3': case '4': case '5': case '6': case '7': moved++; if (*dir % 2 == 0) dist = dtab[*p - '0']; else dist = *p - '0'; *row -= dr[*dir] * dist; *col -= dc[*dir] * dist; break; } } if (!moved) { if (windspeed != 0 && ++*drift > 2) { if ((ship->specs->class >= 3 && !snagged(ship)) || (turn & 1) == 0) { *row -= dr[winddir]; *col -= dc[winddir]; } } } else *drift = 0; } void try(command, commandl, temp, templ, ma, ta, af, vma, dir, f, t, high, rakeme) char command[]; size_t commandl; char temp[]; size_t templ; int ma, ta, af, vma, dir; struct ship *f, *t; int *high, rakeme; { int new, n; char st[4]; #define rakeyou (gunsbear(f, t) && !gunsbear(t, f)) if ((n = str_end(temp)) < '1' || n > '9') for (n = 1; vma - n >= 0; n++) { (void) snprintf(st, sizeof st, "%d", n); (void) strlcat(temp, st, templ); new = score(temp, templ, f, t, rakeme); if (new > *high && (!rakeme || rakeyou)) { *high = new; (void) strlcpy(command, temp, commandl); } try(command, commandl, temp, templ, ma-n, ta, af, vma-n, dir, f, t, high, rakeme); rmend(temp); } if ((ma > 0 && ta > 0 && (n = str_end(temp)) != 'l' && n != 'r') || !strlen(temp)) { (void) strlcat(temp, "r", templ); new = score(temp, templ, f, t, rakeme); if (new > *high && (!rakeme || (gunsbear(f, t) && !gunsbear(t, f)))) { *high = new; (void) strlcpy(command, temp, commandl); } try(command, commandl, temp, templ, ma-1, ta-1, af, min(ma-1, maxmove(f, (dir == 8 ? 1 : dir+1), 0)), (dir == 8 ? 1 : dir+1),f,t,high,rakeme); rmend(temp); } if ((ma > 0 && ta > 0 && (n = str_end(temp)) != 'l' && n != 'r') || !strlen(temp)){ (void) strlcat(temp, "l", templ); new = score(temp, templ, f, t, rakeme); if (new > *high && (!rakeme || (gunsbear(f, t) && !gunsbear(t, f)))){ *high = new; (void) strlcpy(command, temp, commandl); } try(command, commandl, temp, templ, ma-1, ta-1, af, (min(ma-1,maxmove(f, (dir-1 ? dir-1 : 8), 0))), (dir-1 ? dir -1 : 8), f, t, high, rakeme); rmend(temp); } } void rmend(str) char *str; { char *p; for (p = str; *p; p++) ; if (p != str) *--p = 0; }