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annotate arogue5/move.c @ 132:66b0263af424

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arogue7: prevent segfaults when backstabbing while empty-handed. The calculation of the backstabbing multiplier checked the current weapon's properties without making sure the current weapon pointer was not NULL.
author John "Elwin" Edwards
date Tue, 12 May 2015 18:57:30 -0400
parents 0ed67132cf10
children a0a57cf42810
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63
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1 /*
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2 * Hero movement commands
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3 *
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4 * Advanced Rogue
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5 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * Based on "Super-Rogue"
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9 * Copyright (C) 1984 Robert D. Kindelberger
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10 * All rights reserved.
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11 *
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12 * Based on "Rogue: Exploring the Dungeons of Doom"
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13 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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14 * All rights reserved.
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15 *
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16 * See the file LICENSE.TXT for full copyright and licensing information.
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17 */
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18
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19 #include "curses.h"
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20 #include <ctype.h>
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21 #include "rogue.h"
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22
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23 /*
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24 * Used to hold the new hero position
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25 */
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26
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27 static coord nh;
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28
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29 static const char Moves[3][3] = {
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30 { 'y', 'k', 'u' },
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31 { 'h', '\0', 'l' },
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32 { 'b', 'j', 'n' }
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33 };
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34
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35 /*
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36 * be_trapped:
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37 * The guy stepped on a trap.... Make him pay.
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38 */
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39
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40 be_trapped(th, tc)
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41 register struct thing *th;
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42 register coord *tc;
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43 {
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44 register struct trap *tp;
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45 register char ch;
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46 register const char *mname = NULL;
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47 register bool is_player = (th == &player),
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48 can_see;
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49 register struct linked_list *mitem = NULL;
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50
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51
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52 /* Can the player see the creature? */
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53 can_see = (cansee(tc->y, tc->x) && (is_player || !invisible(th)));
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54
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55 tp = trap_at(tc->y, tc->x);
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56 /*
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57 * if he's wearing boots of elvenkind, he won't set off the trap
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58 * unless its a magic pool (they're not really traps)
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59 */
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60 if (is_player &&
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61 cur_misc[WEAR_BOOTS] != NULL &&
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62 cur_misc[WEAR_BOOTS]->o_which == MM_ELF_BOOTS &&
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63 tp->tr_type != POOL)
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64 return '\0';
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65
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66 /*
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67 * if the creature is flying then it won't set off the trap
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68 */
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69 if (on(*th, ISFLY))
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70 return '\0';
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71
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72 tp->tr_flags |= ISFOUND;
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73
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74 if (!is_player) {
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75 mitem = find_mons(th->t_pos.y, th->t_pos.x);
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76 mname = monsters[th->t_index].m_name;
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77 }
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78 else {
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79 count = running = FALSE;
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80 mvwaddch(cw, tp->tr_pos.y, tp->tr_pos.x, tp->tr_type);
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81 }
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82 switch (ch = tp->tr_type) {
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83 case TRAPDOOR:
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84 if (is_player) {
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85 level++;
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86 pstats.s_hpt -= roll(1, 10);
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87 msg("You fell into a trap!");
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88 if (pstats.s_hpt <= 0) death(D_FALL);
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89 new_level(NORMLEV);
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90 }
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91 else {
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92 if (can_see) msg("The %s fell into a trap!", mname);
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93
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94 /* See if the fall killed the monster */
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95 if ((th->t_stats.s_hpt -= roll(1, 10)) <= 0) {
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96 killed(mitem, FALSE, FALSE);
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97 }
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98 else { /* Just move monster to next level */
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99 check_residue(th);
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100
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101 /* Erase the monster from the old position */
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102 if (isalpha(mvwinch(cw, th->t_pos.y, th->t_pos.x)))
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103 mvwaddch(cw, th->t_pos.y, th->t_pos.x, th->t_oldch);
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104 mvwaddch(mw, th->t_pos.y, th->t_pos.x, ' ');
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105 turn_on(*th, ISELSEWHERE);
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