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annotate arogue5/passages.c @ 233:0990adf580ee

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Declare some function arguments as const. Some functions, mostly in fight.c, declared variables as pointers to const char but passed them to functions that took pointers to ordinary char. The strings did not actually get modified, so adding 'const' to the function definitions removed the warnings.
author John "Elwin" Edwards
date Sun, 06 Mar 2016 19:32:47 -0500
parents 56e748983fa8
children e52a8a7ad4c5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 3.4 (Berkeley) 6/15/81
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5 *
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6 * Advanced Rogue
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7 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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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 <stdlib.h>
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18 #include "curses.h"
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19 #include "rogue.h"
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20
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21 void conn(int r1, int r2);
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22 void door(struct room *rm, coord *cp);
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23
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24 /*
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25 * do_passages:
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26 * Draw all the passages on a level.
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27 */
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28
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29 void
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30 do_passages(void)
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31 {
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32 register struct rdes *r1, *r2 = NULL;
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33 register int i, j;
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34 register int roomcount;
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35 static struct rdes
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36 {
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37 bool conn[MAXROOMS]; /* possible to connect to room i? */
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38 bool isconn[MAXROOMS]; /* connection been made to room i? */
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39 bool ingraph; /* this room in graph already? */
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40 } rdes[MAXROOMS] = {
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41 { { 0, 1, 0, 1, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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42 { { 1, 0, 1, 0, 1, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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43 { { 0, 1, 0, 0, 0, 1, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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44 { { 1, 0, 0, 0, 1, 0, 1, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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45 { { 0, 1, 0, 1, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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46 { { 0, 0, 1, 0, 1, 0, 0, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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47 { { 0, 0, 0, 1, 0, 0, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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48 { { 0, 0, 0, 0, 1, 0, 1, 0, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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49 { { 0, 0, 0, 0, 0, 1, 0, 1, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0 }, 0 },
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50 };
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51
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52 /*
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53 * reinitialize room graph description
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54 */
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55 for (r1 = rdes; r1 <= &rdes[MAXROOMS-1]; r1++)
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56 {
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57 for (j = 0; j < MAXROOMS; j++)
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58 r1->isconn[j] = FALSE;
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59 r1->ingraph = FALSE;
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60 }
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61
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62 /*
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63 * starting with one room, connect it to a random adjacent room and
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64 * then pick a new room to start with.
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65 */
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66 roomcount = 1;
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67 r1 = &rdes[rnd(MAXROOMS)];
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68 r1->ingraph = TRUE;
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69 do
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70 {
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71 /*
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72 * find a room to connect with
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73 */
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74 j = 0;
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75 for (i = 0; i < MAXROOMS; i++)
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76 if (r1->conn[i] && !rdes[i].ingraph && rnd(++j) == 0)
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77 r2 = &rdes[i];
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78 /*
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79 * if no adjacent rooms are outside the graph, pick a new room
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80 * to look from
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81 */
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82 if (j == 0)
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83 {
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84 do
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85 r1 = &rdes[rnd(MAXROOMS)];
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86 until (r1->ingraph);
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87 }
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88 /*
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89 * otherwise, connect new room to the graph, and draw a tunnel
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90 * to it
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91 */
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92 else
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93 {
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94 r2->ingraph = TRUE;
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95 i = (int)(r1 - rdes);
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96 j = (int)(r2 - rdes);
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97 conn(i, j);
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98 r1->isconn[j] = TRUE;
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99 r2->isconn[i] = TRUE;
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100 roomcount++;
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101 }
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