| File: | src/games/trek/warp.c |
| Warning: | line 117, column 3 Value stored to 'dist' is never read |
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| 1 | /* $OpenBSD: warp.c,v 1.8 2016/01/07 14:37:51 mestre Exp $ */ |
| 2 | /* $NetBSD: warp.c,v 1.3 1995/04/22 10:59:40 cgd Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1980, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include <string.h> |
| 35 | #include <unistd.h> |
| 36 | |
| 37 | #include "getpar.h" |
| 38 | #include "trek.h" |
| 39 | |
| 40 | /* |
| 41 | ** MOVE UNDER WARP POWER |
| 42 | ** |
| 43 | ** This is both the "move" and the "ram" commands, differing |
| 44 | ** only in the flag 'fl'. It is also used for automatic |
| 45 | ** emergency override mode, when 'fl' is < 0 and 'c' and 'd' |
| 46 | ** are the course and distance to be moved. If 'fl' >= 0, |
| 47 | ** the course and distance are asked of the captain. |
| 48 | ** |
| 49 | ** The guts of this routine are in the routine move(), which |
| 50 | ** is shared with impulse(). Also, the working part of this |
| 51 | ** routine is very small; the rest is to handle the slight chance |
| 52 | ** that you may be moving at some riduculous speed. In that |
| 53 | ** case, there is code to handle time warps, etc. |
| 54 | */ |
| 55 | |
| 56 | void |
| 57 | dowarp(int fl) |
| 58 | { |
| 59 | int c; |
| 60 | double d; |
| 61 | |
| 62 | if (getcodi(&c, &d)) |
| 63 | return; |
| 64 | warp(fl, c, d); |
| 65 | } |
| 66 | |
| 67 | void |
| 68 | warp(int fl, int c, double d) |
| 69 | { |
| 70 | char *p; |
| 71 | double power, dist, time, speed, frac; |
| 72 | int course, percent, i; |
| 73 | |
| 74 | if (Ship.cond == DOCKED1) |
| 75 | { |
| 76 | printf("%s is docked\n", Ship.shipname); |
| 77 | return; |
| 78 | } |
| 79 | if (damaged(WARP0)) |
| 80 | { |
| 81 | out(WARP0); |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | course = c; |
| 86 | dist = d; |
| 87 | |
| 88 | /* check to see that we are not using an absurd amount of power */ |
| 89 | power = (dist + 0.05) * Ship.warp3; |
| 90 | percent = 100 * power / Ship.energy + 0.5; |
| 91 | if (percent >= 85) |
| 92 | { |
| 93 | printf("Scotty: That would consume %d%% of our remaining energy.\n", |
| 94 | percent); |
| 95 | if (!getynpar("Are you sure that is wise")) |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | /* compute the speed we will move at, and the time it will take */ |
| 100 | speed = Ship.warp2 / Param.warptime; |
| 101 | time = dist / speed; |
| 102 | |
| 103 | /* check to see that that value is not ridiculous */ |
| 104 | percent = 100 * time / Now.time + 0.5; |
| 105 | if (percent >= 85) |
| 106 | { |
| 107 | printf("Spock: That would take %d%% of our remaining time.\n", |
| 108 | percent); |
| 109 | if (!getynpar("Are you sure that is wise")) |
| 110 | return; |
| 111 | } |
| 112 | |
| 113 | /* compute how far we will go if we get damages */ |
| 114 | if (Ship.warp > 6.0 && ranf(100) < 20 + 15 * (Ship.warp - 6.0)) |
| 115 | { |
| 116 | frac = franf(); |
| 117 | dist *= frac; |
Value stored to 'dist' is never read | |
| 118 | time *= frac; |
| 119 | damage(WARP0, (frac + 1.0) * Ship.warp * (franf() + 0.25) * 0.20); |
| 120 | } |
| 121 | |
| 122 | /* do the move */ |
| 123 | Move.time = move(fl, course, time, speed); |
| 124 | |
| 125 | /* see how far we actually went, and decrement energy appropriately */ |
| 126 | dist = Move.time * speed; |
| 127 | Ship.energy -= dist * Ship.warp3 * (Ship.shldup + 1); |
| 128 | |
| 129 | /* test for bizarre events */ |
| 130 | if (Ship.warp <= 9.0) |
| 131 | return; |
| 132 | printf("\n\n ___ Speed exceeding warp nine ___\n\n"); |
| 133 | sleep(2); |
| 134 | printf("Ship's safety systems malfunction\n"); |
| 135 | sleep(2); |
| 136 | printf("Crew experiencing extreme sensory distortion\n"); |
| 137 | sleep(4); |
| 138 | if (ranf(100) >= 100 * dist) |
| 139 | { |
| 140 | printf("Equilibrium restored -- all systems normal\n"); |
| 141 | return; |
| 142 | } |
| 143 | |
| 144 | /* select a bizarre thing to happen to us */ |
| 145 | percent = ranf(100); |
| 146 | if (percent < 70) |
| 147 | { |
| 148 | /* time warp */ |
| 149 | if (percent < 35 || !Game.snap) |
| 150 | { |
| 151 | /* positive time warp */ |
| 152 | time = (Ship.warp - 8.0) * dist * (franf() + 1.0); |
| 153 | Now.date += time; |
| 154 | printf("Positive time portal entered -- it is now Stardate %.2f\n", |
| 155 | Now.date); |
| 156 | for (i = 0; i < MAXEVENTS25; i++) |
| 157 | { |
| 158 | percent = Event[i].evcode; |
| 159 | if (percent == E_FIXDV7 || percent == E_LRTB1) |
| 160 | Event[i].date += time; |
| 161 | } |
| 162 | return; |
| 163 | } |
| 164 | |
| 165 | /* s/he got lucky: a negative time portal */ |
| 166 | time = Now.date; |
| 167 | p = (char *) Etc.snapshot; |
| 168 | memcpy(p, Quad, sizeof Quad); |
| 169 | p += sizeof Quad; |
| 170 | memcpy(p, Event, sizeof Event); |
| 171 | p += sizeof Event; |
| 172 | memcpy(p, &Now, sizeof Now); |
| 173 | printf("Negative time portal entered -- it is now Stardate %.2f\n", |
| 174 | Now.date); |
| 175 | for (i = 0; i < MAXEVENTS25; i++) |
| 176 | if (Event[i].evcode == E_FIXDV7) |
| 177 | reschedule(&Event[i], Event[i].date - time); |
| 178 | return; |
| 179 | } |
| 180 | |
| 181 | /* test for just a lot of damage */ |
| 182 | if (percent < 80) |
| 183 | lose(L_TOOFAST9); |
| 184 | printf("Equilibrium restored -- extreme damage occurred to ship systems\n"); |
| 185 | for (i = 0; i < NDEV16; i++) |
| 186 | damage(i, (3.0 * (franf() + franf()) + 1.0) * Param.damfac[i]); |
| 187 | Ship.shldup = 0; |
| 188 | } |