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annotate srogue/pstats.c @ 83:09db0cf536af

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Properly handle invalid room references in savefiles. In all games, rs_write_room_reference() stored -1 for a nonexistent room, but rs_read_room_reference() did not check for out-of-bounds values, leading to pointers to rooms[-1], which sometimes caused crashes. rs_read_room_reference() has now been modified to use NULL instead. Some of the games required further changes to replace NULL with the pointer to the actual room. Others are capable of handling NULL for objects not in any room.
author John "Elwin" Edwards
date Thu, 08 Aug 2013 12:41:35 -0700
parents 2128c7dc8a40
children 94a0d9dd5ce1
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36
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1 /*
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2 * Players status routines
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3 *
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4 * @(#)pstats.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 * See the file LICENSE.TXT for full copyright and licensing information.
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11 */
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12
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13 #include "rogue.h"
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14 #include "rogue.ext"
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15
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16
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17 /*
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18 * chg_hpt:
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19 * Changes players hit points
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20 */
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21 chg_hpt(howmany, alsomax, what)
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22 int howmany;
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23 bool alsomax;
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24 char what;
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25 {
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26 nochange = FALSE;
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27 if(alsomax)
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28 him->s_maxhp += howmany;
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29 him->s_hpt += howmany;
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30 if (him->s_hpt < 1) {
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31 msg(" ");
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32 death(what);
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33 }
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34 }
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35
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36
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37 /*
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38 * rchg_str:
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39 * Update the players real strength
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40 */
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41 rchg_str(amt)
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42 int amt;
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43 {
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44 chg_abil(STR,amt,TRUE);
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45 }
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46
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47 /*
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48 * chg_abil:
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49 * Used to modify the hero's abilities
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50 */
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51 chg_abil(what,amt,how)
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52 int amt, what, how;
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53 {
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54 if (amt == 0)
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55 return;
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56 if (how == TRUE) { /* real (must be 1st) */
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57 updabil(what,amt,&pstats.s_re,TRUE);
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58 how = FALSE;
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59 }
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60 updabil(what,amt,&pstats.s_ef,how); /* effective */
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61 updpack();
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62 wghtchk(FALSE);
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63 }
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64
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65 /*
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66 * updabil:
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67 * Do the actual abilities updating
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68 */
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69 updabil(what, amt, pst, how)
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70 struct real *pst;
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71 int what, amt, how;
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72 {
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73 register int *wh, *mx, *mr;
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74 struct real *mst, *msr;
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75 bool is_str = FALSE;
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76 int rtype;
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77
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78 msr = &him->s_re;
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79 if (how == TRUE) /* max real abilities */
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80 mst = &max_stats.s_re;
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81 else /* max effective abil */
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82 mst = &max_stats.s_ef;
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83 switch (what) {
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84 case STR:
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85 is_str = TRUE;
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86 wh = &pst->a_str;
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87 mx = &mst->a_str;
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88 mr = &msr->a_str;
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89 rtype = R_ADDSTR;
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90 when DEX:
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91 wh = &pst->a_dex;
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92 mx = &mst->a_dex;
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93 mr = &msr->a_dex;
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94 rtype = R_DEX;
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95 when CON:
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96 wh = &pst->a_con;
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97 mx = &mst->a_con;
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98 mr = &msr->a_con;
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99 rtype = R_CONST;
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100 when WIS:
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101 wh = &pst->a_wis;
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102 mx = &mst->a_wis;
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103 mr = &msr->a_wis;
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104 rtype = R_KNOW;
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105 otherwise:
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106 return;
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