Mercurial > hg > early-roguelike
annotate srogue/io.c @ 280:70aa5808c782
Fix potential segfaults at restore related to ctime().
In some games, restore() passes the result of ctime() to mvprintw() or
some other variadic message-formatting function. If ctime() has not
been declared properly, its return type is inferred to be int instead
of char *. This does not cause a warning because the compiler does not
know the correct type of variadic arguments.
On platforms where ints and pointers are not the same size, this can,
probably depending on alignment, result in a segfault that is not easy
to trace.
Including time.h fixes the problem. Some games manually declared
ctime() and avoided the bug. These declarations have also been
replaced with the include.
author | John "Elwin" Edwards |
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date | Fri, 15 Sep 2017 20:51:10 -0400 |
parents | 94a0d9dd5ce1 |
children | e52a8a7ad4c5 |
rev | line source |
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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> |
60 | 19 #include <string.h> |
36
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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 void doadd(char *fmt, va_list ap); |
86 | 24 |
36
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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 void |
36
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33 msg(char *fmt, ...) |
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34 { |
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35 va_list ap; |
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36 /* |
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37 * if the string is "", just clear the line |
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38 */ |
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39 if (*fmt == '\0') { |
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40 wmove(cw, 0, 0); |
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41 wclrtoeol(cw); |
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42 mpos = 0; |
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43 return; |
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44 } |
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45 /* |
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46 * otherwise add to the message and flush it out |
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47 */ |
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48 va_start(ap, fmt); |
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49 doadd(fmt, ap); |
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50 va_end(ap); |
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51 endmsg(); |
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52 } |
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53 |
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54 /* |
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55 * addmsg: |
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56 * Add things to the current message |
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57 */ |
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58 void |
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59 addmsg(char *fmt, ...) |
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60 { |
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61 va_list ap; |
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62 |
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63 va_start(ap, fmt); |
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64 doadd(fmt, ap); |
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65 va_end(ap); |
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66 } |
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67 |
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68 /* |
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69 * endmsg: |
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70 * Display a new msg, giving him a chance to see the |
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71 * previous one if it is up there with the --More-- |
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72 */ |
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73 void |
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74 endmsg(void) |
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75 { |
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76 strcpy(huh, msgbuf); |
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77 if (mpos > 0) { |
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78 wmove(cw, 0, mpos); |
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79 waddstr(cw, morestr); |
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80 draw(cw); |
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81 wait_for(cw, ' '); |
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82 } |
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83 mvwaddstr(cw, 0, 0, msgbuf); |
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84 wclrtoeol(cw); |
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85 mpos = newpos; |
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86 newpos = 0; |
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87 draw(cw); |
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88 } |
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89 |
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90 /* |
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91 * doadd: |
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92 * Perform a printf into a buffer |
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93 */ |
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94 void |
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95 doadd(char *fmt, va_list ap) |
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96 { |
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97 vsprintf(&msgbuf[newpos], fmt, ap); |
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98 newpos = strlen(msgbuf); |
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99 } |
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100 |
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101 /* |
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102 * step_ok: |
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103 * Returns TRUE if it is ok to step on ch |
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104 */ |
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105 bool |
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106 step_ok(unsigned char ch) |
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107 { |
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108 if (dead_end(ch)) |
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109 return FALSE; |
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110 else if (ch >= 32 && ch <= 127 && !isalpha(ch)) |
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111 return TRUE; |
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112 return FALSE; |
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113 } |
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114 |
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115 |
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116 /* |
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117 * dead_end: |
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118 * Returns TRUE if you cant walk through that character |
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119 */ |
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120 bool |
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121 dead_end(char ch) |
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122 { |
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123 if (ch == '-' || ch == '|' || ch == ' ' || ch == SECRETDOOR) |
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124 return TRUE; |
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125 else |
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126 return FALSE; |
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127 } |
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128 |
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129 |
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130 /* |
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131 * readchar: |
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132 * flushes stdout so that screen is up to date and then returns |
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133 * getchar. |
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134 */ |
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135 |
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136 int |
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137 readchar(void) |
36
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138 { |
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139 char c; |
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140 |
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141 fflush(stdout); |
86 | 142 return( md_readchar(cw) ); |
36
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143 } |
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144 |
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145 char *hungstr[] = { |
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146 "", |
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147 " HUNGRY", |
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148 " STARVING", |
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149 " FAINTING", |
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150 }; |
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151 |
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152 /* |
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153 * status: |
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154 * Display the important stats line. Keep the cursor where it was. |
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155 */ |
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156 void |
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157 status(int fromfuse) |
36
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158 { |
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159 reg int totwght, carwght; |
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160 reg struct real *stef, *stre, *stmx; |
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161 reg char *pb; |
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162 int oy, ox, ch; |
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163 static char buf[LINLEN]; |
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164 static char hwidth[] = { "%2d(%2d)" }; |
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165 |
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166 /* |
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167 * If nothing has changed since the last time, then done |
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168 */ |
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169 if (nochange) |
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170 return; |
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171 nochange = TRUE; |
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172 updpack(); /* get all weight info */ |
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173 stef = &player.t_stats.s_ef; |
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174 stre = &player.t_stats.s_re; |
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175 stmx = &max_stats.s_re; |
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176 totwght = him->s_carry / 10; |
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177 carwght = him->s_pack / 10; |
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178 getyx(cw, oy, ox); |
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179 if (him->s_maxhp >= 100) { |
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180 hwidth[1] = '3'; /* if hit point >= 100 */ |
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181 hwidth[5] = '3'; /* change %2d to %3d */ |
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182 } |
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183 if (stre->a_str < stmx->a_str) |
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184 ch = '*'; |
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185 else |
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186 ch = ' '; |
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187 sprintf(buf, "Str: %2d(%c%2d)", stef->a_str, ch, stre->a_str); |
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188 pb = &buf[strlen(buf)]; |
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189 if (stre->a_dex < stmx->a_dex) |
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190 ch = '*'; |
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191 else |
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192 ch = ' '; |
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193 sprintf(pb, " Dex: %2d(%c%2d)", stef->a_dex, ch, stre->a_dex); |
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194 pb = &buf[strlen(buf)]; |
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195 if (stre->a_wis < stmx->a_wis) |
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196 ch = '*'; |
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197 else |
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198 ch = ' '; |
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199 sprintf(pb, " Wis: %2d(%c%2d)", stef->a_wis, ch, stre->a_wis); |
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200 pb = &buf[strlen(buf)]; |
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201 if (stre->a_con < stmx->a_con) |
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202 ch = '*'; |
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203 else |
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204 ch = ' '; |
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205 sprintf(pb, " Con: %2d(%c%2d)", stef->a_con, ch, stre->a_con); |
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206 pb = &buf[strlen(buf)]; |
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207 sprintf(pb, " Carry: %3d(%3d)", carwght, totwght); |
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208 mvwaddstr(cw, LINES - 1, 0, buf); |
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209 sprintf(buf, "Level: %d Gold: %5d Hp: ",level, purse); |
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210 pb = &buf[strlen(buf)]; |
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211 sprintf(pb, hwidth, him->s_hpt, him->s_maxhp); |
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212 pb = &buf[strlen(buf)]; |
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213 sprintf(pb," Ac: %-2d Exp: %d/%ld",cur_armor == NULL ? him->s_arm : |
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214 cur_armor->o_ac, him->s_lvl, him->s_exp); |
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215 carwght = (packvol * 100) / V_PACK; |
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216 pb = &buf[strlen(buf)]; |
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217 sprintf(pb, " Vol: %3d%%", carwght); |
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218 mvwaddstr(cw, LINES - 2, 0, buf); |
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219 waddstr(cw, hungstr[hungry_state]); |
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220 wclrtoeol(cw); |
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221 wmove(cw, oy, ox); |
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222 } |
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223 |
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224 /* |
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225 * dispmax: |
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226 * Display the hero's maximum status |
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227 */ |
217
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228 void |
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229 dispmax(void) |
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230 { |
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231 reg struct real *hmax; |
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232 |
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233 hmax = &max_stats.s_re; |
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234 msg("Maximums: Str = %d Dex = %d Wis = %d Con = %d", |
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235 hmax->a_str, hmax->a_dex, hmax->a_wis, hmax->a_con); |
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236 } |
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237 |
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238 /* |
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239 * illeg_ch: |
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240 * Returns TRUE if a char shouldn't show on the screen |
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241 */ |
217
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242 bool |
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243 illeg_ch(unsigned char ch) |
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244 { |
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245 if (ch < 32 || ch > 127) |
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246 return TRUE; |
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247 if (ch >= '0' && ch <= '9') |
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248 return TRUE; |
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249 return FALSE; |
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250 } |
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251 |
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252 /* |
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253 * wait_for: |
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254 * Sit around until the guy types the right key |
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255 */ |
217
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256 void |
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257 wait_for(WINDOW *win, char ch) |
36
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258 { |
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259 register char c; |
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260 |
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261 if (ch == '\n') |
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262 while ((c = wgetch(win)) != '\n' && c != '\r') |
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263 continue; |
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264 else |
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265 while (wgetch(win) != ch) |
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266 continue; |
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267 } |
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268 |
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269 #ifdef NEED_GETTIME |
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270 #include <stdio.h> |
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271 #include <time.h> |
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272 |
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273 /* |
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274 * gettime: |
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275 * This routine returns the current time as a string |
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276 */ |
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277 |
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278 char * |
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279 gettime() |
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280 { |
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281 register char *timeptr; |
280
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282 long int now; |
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283 |
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284 time(&now); /* get current time */ |
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285 timeptr = ctime(&now); /* convert to string */ |
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286 return timeptr; /* return the string */ |
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287 } |
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288 #endif |
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289 |
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290 |
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291 /* |
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292 * dbotline: |
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293 * Displays message on bottom line and waits for a space to return |
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294 */ |
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295 void |
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296 dbotline(WINDOW *scr, char *message) |
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297 { |
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298 mvwaddstr(scr,LINES-1,0,message); |
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299 draw(scr); |
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300 wait_for(scr,' '); |
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301 } |
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302 |
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303 |
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304 /* |
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305 * restscr: |
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306 * Restores the screen to the terminal |
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307 */ |
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308 void |
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309 restscr(WINDOW *scr) |
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310 { |
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311 clearok(scr,TRUE); |
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312 touchwin(scr); |
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313 } |
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314 |
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315 /* |
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316 * npch: |
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317 * Get the next char in line for inventories |
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318 */ |
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319 char |
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320 npch(char ch) |
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321 { |
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322 reg char nch; |
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323 if (ch >= 'z') |
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324 nch = 'A'; |
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325 else |
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326 nch = ch + 1; |
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327 return nch; |
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328 } |