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annotate srogue/trader.c @ 81:0e212d46b68f

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rogue4: don't put savefile metadata into the savefile. The save_file() function in save.c stored the savefile's device number, inode number, creation time, and modification time in the file. The restore() function read them back, and apparently used to compare them to protect against cheaters. Unfortunately, the types and sizes of these numbers differ from system to system, which ruins the Roguelike Restoration Project's fine portability work. So they have been removed from the savefile. This BREAKS SAVEFILE COMPATIBILITY, but old files can be converted by excising the chunk starting at offset 0x22 with length sizeof(ino_t) + sizeof(dev_t) + 2 * sizeof(time_t). That's 0x14 on i686 and 0x20 on x86_64, at least with current versions of Linux and glibc.
author John "Elwin" Edwards
date Mon, 05 Aug 2013 20:49:41 -0700
parents 2128c7dc8a40
children 94a0d9dd5ce1
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36
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1 /*
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2 * Anything to do with trading posts & mazes
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3 *
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4 * @(#)trader.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 <stdlib.h>
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14 #include "rogue.h"
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15 #include "rogue.ext"
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16
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17 #define NOTPRICED -1
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18
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19 /*
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20 * do_post:
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21 * Put a trading post room and stuff on the screen
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22 */
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23 do_post()
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24 {
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25 struct coord tp;
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26 reg int i;
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27 reg struct room *rp;
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28 reg struct object *op;
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29 reg struct linked_list *ll;
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30
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31 free_list(lvl_obj); /* throw old items away */
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32
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33 for (rp = rooms; rp < &rooms[MAXROOMS]; rp++) {
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34 rp->r_goldval = 0; /* no gold */
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35 rp->r_nexits = 0; /* no exits */
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36 rp->r_flags = ISGONE; /* kill all rooms */
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37 }
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38 rp = &rooms[0]; /* point to only room */
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39 rp->r_flags = 0; /* this room NOT gone */
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40 rp->r_max.x = 40;
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41 rp->r_max.y = 10; /* 10 * 40 room */
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42 rp->r_pos.x = (COLS - rp->r_max.x) / 2; /* center horizontal */
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43 rp->r_pos.y = 1; /* 2nd line */
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44 draw_room(rp); /* draw the only room */
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45 i = roll(4,10); /* 10 to 40 items */
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46 for (; i > 0 ; i--) { /* place all the items */
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47 ll = new_thing(FALSE, ANYTHING); /* get something */
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48 attach(lvl_obj, ll);
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49 op = OBJPTR(ll);
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50 setoflg(op, ISPOST); /* object in trading post */
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51 tp = *rnd_pos(rp);
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52 op->o_pos = tp;
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53 mvaddch(tp.y,tp.x,op->o_type);
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54 }
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55 trader = 0;
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56 wmove(cw,12,0);
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57 waddstr(cw,"Welcome to Friendly Fiend's Flea Market\n\r");
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58 waddstr(cw,"=======================================\n\r");
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59 waddstr(cw,"$: Prices object that you stand upon.\n\r");
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60 waddstr(cw,"#: Buys the object that you stand upon.\n\r");
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61 waddstr(cw,"%: Trades in something in your pack for gold.\n\r");
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62 trans_line();
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63 }
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64
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65 /*
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66 * price_it:
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67 * Price the object that the hero stands on
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68 */
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69 price_it()
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70 {
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71 static char *bargain[] = {
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72 "great bargain",
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73 "quality product",
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74 "exceptional find",
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75 };
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76 reg struct linked_list *item;
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77 reg struct object *obj;
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78 reg int worth;
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79
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80 if (!open_market()) /* after buying hours */
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81 return FALSE;
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82 if ((item = find_obj(hero.y,hero.x)) == NULL)
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83 return FALSE;
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84 obj = OBJPTR(item);
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85 if (curprice == NOTPRICED) {
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86 worth = get_worth(obj);
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87 worth += 50 - rnd(100);
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88 if (worth < 25)
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89 worth = 25;
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90 worth *= 3; /* slightly expensive */
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91 curprice = worth; /* save price */
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92 strcpy(curpurch, obj->o_typname); /* save item */
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93 }
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94 msg("That %s is a %s for only %d pieces of gold", curpurch,
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95 bargain[rnd(3)], curprice);
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96 return TRUE;
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97 }
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98
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99 /*
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100 * buy_it:
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101 * Buy the item on which the hero stands
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102 */
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103 buy_it()
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104 {
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105 reg int wh;