annotate srogue/io.c @ 111:7f8f43943b1f

Fix some terribly depressing corruption during restore. In rogue5/state.c, rs_read_daemons() zeroes out the argument and delay if the daemon slot is empty. Unfortunately that code ended up on the wrong side of the brace that closes the for loop, so instead of running after each daemon, it got run once after the loop exited, when the index was of course out of bounds. This tended to manifest, when compiled with -O2, by overwriting hw and setting it to NULL. When inventory() next ran, hw would be passed to wgetch(), which returns ERR when it gets a NULL argument. This made md_readchar() think something was wrong and autosave the game. Upon investigation, rogue3 was found to commit the same mistake. rogue4 and srogue don't zero the data. arogue5 already does it properly. Someday I am going to run all this through Valgrind. Someday when I am a kinder person who will not be driven to invoke hordes of trolls and centaurs upon the original authors.
author John "Elwin" Edwards
date Wed, 08 Jan 2014 16:44:16 -0500
parents 8757a0593e6e
children 458df24e973d
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1 /*
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2 * Various input/output functions
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3 *
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4 * @(#)io.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 <stdarg.h>
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18 #include <ctype.h>
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19 #include <string.h>
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20 #include "rogue.h"
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21 #include "rogue.ext"
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22
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23 int md_readchar(WINDOW *win);
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24
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25 /*
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26 * msg:
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27 * Display a message at the top of the screen.
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28 */
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29 static char msgbuf[BUFSIZ];
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30 static int newpos = 0;
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31
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32 msg(char *fmt, ...)
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33 {
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34 va_list ap;
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35 /*
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36 * if the string is "", just clear the line
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37 */
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38 if (*fmt == '\0') {
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39 wmove(cw, 0, 0);
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40 wclrtoeol(cw);
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41 mpos = 0;
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42 return;
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43 }
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44 /*
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45 * otherwise add to the message and flush it out
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46 */
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47 va_start(ap, fmt);
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48 doadd(fmt, ap);
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49 va_end(ap);
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50 endmsg();
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51 }
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52
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53 /*
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54 * addmsg:
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55 * Add things to the current message
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56 */
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57 addmsg(char *fmt, ...)
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58 {
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59 va_list ap;
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60
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61 va_start(ap, fmt);
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62 doadd(fmt, ap);
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63 va_end(ap);
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64 }
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65
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66 /*
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67 * endmsg:
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68 * Display a new msg, giving him a chance to see the
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69 * previous one if it is up there with the --More--
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70 */
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71 endmsg()
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72 {
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73 strcpy(huh, msgbuf);
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74 if (mpos > 0) {
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75 wmove(cw, 0, mpos);
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76 waddstr(cw, morestr);
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77 draw(cw);
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78 wait_for(cw, ' ');
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79 }
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80 mvwaddstr(cw, 0, 0, msgbuf);
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81 wclrtoeol(cw);
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82 mpos = newpos;
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83 newpos = 0;
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84 draw(cw);
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85 }
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86
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87 /*
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88 * doadd:
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89 * Perform a printf into a buffer
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90 */
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91 doadd(char *fmt, va_list ap)
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92 {
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93 vsprintf(&msgbuf[newpos], fmt, ap);
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94 newpos = strlen(msgbuf);
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95 }
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96
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97 /*
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98 * step_ok:
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99 * Returns TRUE if it is ok to step on ch
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100 */
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101 step_ok(ch)
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102 unsigned char ch;
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103 {
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104 if (dead_end(ch))
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105 return FALSE;
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106 else if (ch >= 32 && ch <= 127 && !isalpha(ch))
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107 return TRUE;