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annotate srogue/passages.c @ 162:600873555ec0

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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 2128c7dc8a40
children 7f5f5f1ba09c
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36
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1 /*
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2 * Draw the connecting passages
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3 *
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4 * @(#)passages.c 9.0 (rdk) 7/17/84
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5 *
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6 * Super-Rogue
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7 * Copyright (C) 1984 Robert D. Kindelberger
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8 * All rights reserved.
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9 *
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10 * Based on "Rogue: Exploring the Dungeons of Doom"
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11 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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12 * All rights reserved.
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13 *
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14 * See the file LICENSE.TXT for full copyright and licensing information.
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15 */
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16
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17 #include "rogue.h"
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18 #include "rogue.ext"
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19
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20 /*
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21 * do_passages:
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22 * Draw all the passages on a level.
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23 */
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24
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25 do_passages()
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26 {
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27 reg struct rdes *r1, *r2;
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28 reg int i, j;
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29 reg int roomcount;
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30 static struct rdes {
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31 bool conn[MAXROOMS]; /* possible to connect to room i */
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32 bool isconn[MAXROOMS]; /* connection was made to room i */
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33 bool ingraph; /* this room in graph already? */
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34 } rdes[MAXROOMS] = {
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35 {{ 0, 1, 0, 1, 0, 0, 0, 0, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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36 {{ 1, 0, 1, 0, 1, 0, 0, 0, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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37 {{ 0, 1, 0, 0, 0, 1, 0, 0, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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38 {{ 1, 0, 0, 0, 1, 0, 1, 0, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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39 {{ 0, 1, 0, 1, 0, 1, 0, 1, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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40 {{ 0, 0, 1, 0, 1, 0, 0, 0, 1 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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41 {{ 0, 0, 0, 1, 0, 0, 0, 1, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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42 {{ 0, 0, 0, 0, 1, 0, 1, 0, 1 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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43 {{ 0, 0, 0, 0, 0, 1, 0, 1, 0 },{ 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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44 };
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45
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46 /*
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47 * reinitialize room graph description
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48 */
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49 for (r1 = rdes; r1 < &rdes[MAXROOMS]; r1++) {
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50 for (j = 0; j < MAXROOMS; j++)
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51 r1->isconn[j] = FALSE;
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52 r1->ingraph = FALSE;
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53 }
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54
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55 /*
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56 * starting with one room, connect it to a random adjacent room and
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57 * then pick a new room to start with.
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58 */
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59 roomcount = 1;
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60 r1 = &rdes[rnd(MAXROOMS)];
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61 r1->ingraph = TRUE;
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62 do {
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63 /*
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64 * find a room to connect with
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65 */
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66 j = 0;
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67 for (i = 0; i < MAXROOMS; i++)
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68 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
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69 r2 = &rdes[i];
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70 /*
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71 * if no adjacent rooms are outside the graph, pick a new room
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72 * to look from
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73 */
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74 if (j == 0) {
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75 do {
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76 r1 = &rdes[rnd(MAXROOMS)];
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77 } until (r1->ingraph);
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78 }
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79 /*
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80 * otherwise, connect new room to the graph, and draw a tunnel
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81 * to it
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82 */
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83 else {
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84 r2->ingraph = TRUE;
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85 i = r1 - rdes;
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86 j = r2 - rdes;
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87 conn(i, j);
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88 r1->isconn[j] = TRUE;
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89 r2->isconn[i] = TRUE;
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90 roomcount++;
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91 }
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92 } while (roomcount < MAXROOMS);
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93
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94 /*
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95 * attempt to add passages to the graph a random number of times so
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96 * that there isn't just one unique passage through it.
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97 */
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98 for (roomcount = rnd(5); roomcount > 0; roomcount--) {
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99 r1 = &rdes[rnd(MAXROOMS)]; /* a random room to look from */
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100 /*
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101 * find an adjacent room not already connected
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102 */
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103 j = 0;
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104 for (i = 0; i < MAXROOMS; i++)
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