Early Roguelike Collection: xrogue/chase.c annotate

annotate xrogue/chase.c @ 162:600873555ec0

Don't swap signal handlers in md_shellescape(). md_shellescape() sets SIGINT and SIGQUIT to be ignored, storing the previous handlers, and restores them after the shell exits. But it mixed up the two handlers. Since the signals were usually handled by the same function, this fix doesn't have much effect, but anything that makes signal code less confusing is a good thing.

author	John "Elwin" Edwards
date	Mon, 08 Jun 2015 10:01:25 -0400
parents	e6179860cb76
children	f54901b9c39b

rev	line source
133 e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	1 /*
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	2 chase.c - Code for one object to chase another
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	3
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	4 XRogue: Expeditions into the Dungeons of Doom
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	5 Copyright (C) 1991 Robert Pietkivitch
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	6 All rights reserved.
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	7
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	8 Based on "Advanced Rogue"
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	9 Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	10 All rights reserved.
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	11
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	12 Based on "Rogue: Exploring the Dungeons of Doom"
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	13 Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	14 All rights reserved.
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	15
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	16 See the file LICENSE.TXT for full copyright and licensing information.
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	17 */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	18
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	19 #include <ctype.h>
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	20 #include <curses.h>
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	21 #include <limits.h>
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	22 #include "rogue.h"
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	23
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	24 /*
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	25 * Canblink checks if the monster can teleport (blink). If so, it will
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	26 * try to blink the monster next to the player.
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	27 */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	28
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	29 bool
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	30 can_blink(tp)
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	31 register struct thing *tp;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	32 {
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	33 register int y, x, index=9;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	34 coord tryp; /* To hold the coordinates for use in diag_ok */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	35 bool spots[9], found_one=FALSE;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	36
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	37 /*
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	38 * First, can the monster even blink? And if so, there is only a 50%
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	39 * chance that it will do so. And it won't blink if it is running or
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	40 * held.
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	41 */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	42 if (off(tp, CANBLINK) \|\| (on(tp, ISHELD)) \|\|
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	43 on(*tp, ISFLEE) \|\|
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	44 tp->t_action == A_FREEZE \|\|
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	45 (rnd(12) < 6)) return(FALSE);
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	46
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	47
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	48 /* Initialize the spots as illegal */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	49 do {
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	50 spots[--index] = FALSE;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	51 } while (index > 0);
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	52
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	53 /* Find a suitable spot next to the player */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	54 for (y=hero.y-1; y<hero.y+2; y++)
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	55 for (x=hero.x-1; x<hero.x+2; x++, index++) {
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	56 /* Make sure x coordinate is in range and that we are
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	57 * not at the player's position
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	58 */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	59 if (x<0 \|\| x >= cols \|\| index == 4) continue;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	60
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	61 /* Is it OK to move there? */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	62 if (step_ok(y, x, NOMONST, tp) &&
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	63 (!isatrap(mvwinch(cw, y, x)) \|\|
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	64 rnd(10) >= tp->t_stats.s_intel \|\|
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	65 on(*tp, ISFLY))) {
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	66 /* OK, we can go here. But don't go there if
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	67 * monster can't get at player from there
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	68 */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	69 tryp.y = y;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	70 tryp.x = x;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	71 if (diag_ok(&tryp, &hero, tp)) {
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	72 spots[index] = TRUE;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	73 found_one = TRUE;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	74 }
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	75 }
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	76 }
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	77
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	78 /* If we found one, go to it */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	79 if (found_one) {
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	80 unsigned char rch; /* What's really where the creatures moves to */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	81
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	82 /* Find a legal spot */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	83 while (spots[index=rnd(9)] == FALSE) continue;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	84
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	85 /* Get the coordinates */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	86 y = hero.y + (index/3) - 1;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	87 x = hero.x + (index % 3) - 1;
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	88
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	89 /* Move the monster from the old space */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	90 mvwaddch(cw, tp->t_pos.y, tp->t_pos.x, tp->t_oldch);
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	91
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff changeset	92 /* Move it to the new space */
e6179860cb76 Import XRogue 8.0 from the Roguelike Restoration Project (r1490) John "Elwin" Edwards parents: diff

Mercurial > hg > early-roguelike

annotate xrogue/chase.c @ 162:600873555ec0