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enable swapping for 8 bit on big endian machines
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1/* s_power.c
2 *
3 * Micropolis, Unix Version. This game was released for the Unix platform
4 * in or about 1990 and has been modified for inclusion in the One Laptop
5 * Per Child program. Copyright (C) 1989 - 2007 Electronic Arts Inc. If
6 * you need assistance with this program, you may contact:
7 * http://wiki.laptop.org/go/Micropolis or email micropolis@laptop.org.
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details. You should have received a
18 * copy of the GNU General Public License along with this program. If
19 * not, see <http://www.gnu.org/licenses/>.
20 *
21 * ADDITIONAL TERMS per GNU GPL Section 7
22 *
23 * No trademark or publicity rights are granted. This license does NOT
24 * give you any right, title or interest in the trademark SimCity or any
25 * other Electronic Arts trademark. You may not distribute any
26 * modification of this program using the trademark SimCity or claim any
27 * affliation or association with Electronic Arts Inc. or its employees.
28 *
29 * Any propagation or conveyance of this program must include this
30 * copyright notice and these terms.
31 *
32 * If you convey this program (or any modifications of it) and assume
33 * contractual liability for the program to recipients of it, you agree
34 * to indemnify Electronic Arts for any liability that those contractual
35 * assumptions impose on Electronic Arts.
36 *
37 * You may not misrepresent the origins of this program; modified
38 * versions of the program must be marked as such and not identified as
39 * the original program.
40 *
41 * This disclaimer supplements the one included in the General Public
42 * License. TO THE FULLEST EXTENT PERMISSIBLE UNDER APPLICABLE LAW, THIS
43 * PROGRAM IS PROVIDED TO YOU "AS IS," WITH ALL FAULTS, WITHOUT WARRANTY
44 * OF ANY KIND, AND YOUR USE IS AT YOUR SOLE RISK. THE ENTIRE RISK OF
45 * SATISFACTORY QUALITY AND PERFORMANCE RESIDES WITH YOU. ELECTRONIC ARTS
46 * DISCLAIMS ANY AND ALL EXPRESS, IMPLIED OR STATUTORY WARRANTIES,
47 * INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY, SATISFACTORY QUALITY,
48 * FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT OF THIRD PARTY
49 * RIGHTS, AND WARRANTIES (IF ANY) ARISING FROM A COURSE OF DEALING,
50 * USAGE, OR TRADE PRACTICE. ELECTRONIC ARTS DOES NOT WARRANT AGAINST
51 * INTERFERENCE WITH YOUR ENJOYMENT OF THE PROGRAM; THAT THE PROGRAM WILL
52 * MEET YOUR REQUIREMENTS; THAT OPERATION OF THE PROGRAM WILL BE
53 * UNINTERRUPTED OR ERROR-FREE, OR THAT THE PROGRAM WILL BE COMPATIBLE
54 * WITH THIRD PARTY SOFTWARE OR THAT ANY ERRORS IN THE PROGRAM WILL BE
55 * CORRECTED. NO ORAL OR WRITTEN ADVICE PROVIDED BY ELECTRONIC ARTS OR
56 * ANY AUTHORIZED REPRESENTATIVE SHALL CREATE A WARRANTY. SOME
57 * JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF OR LIMITATIONS ON IMPLIED
58 * WARRANTIES OR THE LIMITATIONS ON THE APPLICABLE STATUTORY RIGHTS OF A
59 * CONSUMER, SO SOME OR ALL OF THE ABOVE EXCLUSIONS AND LIMITATIONS MAY
60 * NOT APPLY TO YOU.
61 */
62#include "sim.h"
63
64
65/* Power Scan */
66
67
68int PowerStackNum;
69char PowerStackX[PWRSTKSIZE], PowerStackY[PWRSTKSIZE];
70QUAD MaxPower, NumPower;
71
72
73/* comefrom: TestForCond DoPowerScan TryGo */
74MoveMapSim (short MDir)
75{
76 switch (MDir) {
77 case 0:
78 if (SMapY > 0) {
79 SMapY--;
80 return (TRUE);
81 }
82 if (SMapY < 0)
83 SMapY = 0;
84 return (FALSE);
85 case 1:
86 if (SMapX < (WORLD_X - 1)) {
87 SMapX++;
88 return (TRUE);
89 }
90 if (SMapX > (WORLD_X - 1))
91 SMapX = WORLD_X - 1;
92 return (FALSE);
93 case 2:
94 if (SMapY < (WORLD_Y - 1)) {
95 SMapY++;
96 return (TRUE);
97 }
98 if (SMapY > (WORLD_Y - 1))
99 SMapY = WORLD_Y - 1;
100 return (FALSE);
101 case 3:
102 if (SMapX > 0) {
103 SMapX--;
104 return (TRUE);
105 }
106 if (SMapX < 0)
107 SMapX = 0;
108 return (FALSE);
109 case 4:
110 return (TRUE);
111 }
112 return (FALSE);
113}
114
115
116/* inlined -Don */
117#if 0
118/* comefrom: DoPowerScan */
119SetPowerBit(void)
120{
121 register int PowerWrd;
122
123 /* XXX: assumes 120x100 */
124 PowerWrd = (SMapX >>4) + (SMapY <<3);
125 PowerMap[PowerWrd] |= 1 << (SMapX & 15);
126}
127#endif
128
129
130/* inlined */
131#if 0
132/* comefrom: TestForCond */
133int TestPowerBit(void)
134{
135 register int PowerWrd;
136
137 if ((CChr9 == NUCLEAR) || (CChr9 == POWERPLANT))
138 return(1);
139 /* XXX: assumes 120x100 */
140 PowerWrd = (SMapX >>4) + (SMapY <<3);
141 if (PowerWrd >= PWRMAPSIZE)
142 return(0);
143 return ((PowerMap[PowerWrd] & (1 << (SMapX & 15))) ? 1 : 0);
144}
145#endif
146
147
148/* comefrom: DoPowerScan */
149short TestForCond(short TFDir)
150{
151 register int xsave, ysave, PowerWrd;
152
153 xsave = SMapX;
154 ysave = SMapY;
155 if (MoveMapSim(TFDir)) {
156 /* TestPowerBit was taking a lot of time so I swapped the & order -Don */
157#if 0
158 if ((Map[SMapX][SMapY] & CONDBIT) &&
159 (!TestPowerBit()))
160#else
161 if ((Map[SMapX][SMapY] & CONDBIT) &&
162 (CChr9 != NUCLEAR) &&
163 (CChr9 != POWERPLANT) &&
164 (
165#if 0
166 (PowerWrd = (SMapX >>4) + (SMapY <<3)),
167#else
168 (PowerWrd = POWERWORD(SMapX, SMapY)),
169#endif
170 ((PowerWrd > PWRMAPSIZE) ||
171 ((PowerMap[PowerWrd] & (1 << (SMapX & 15))) == 0))))
172#endif
173 {
174 SMapX = xsave;
175 SMapY = ysave;
176 return (TRUE);
177 }
178 }
179 SMapX = xsave;
180 SMapY = ysave;
181 return (FALSE);
182}
183
184
185/* comefrom: Simulate SpecialInit InitSimMemory */
186DoPowerScan()
187{
188 short ADir;
189 register int ConNum, Dir, x;
190
191 for (x = 0; x < PWRMAPSIZE; x++)
192 PowerMap[x] = 0; /* ClearPowerMem */
193
194 MaxPower = (CoalPop * 700L) + (NuclearPop * 2000L); /* post release */
195 NumPower = 0;
196
197 while (PowerStackNum) {
198 PullPowerStack();
199 ADir = 4;
200 do {
201 if (++NumPower > MaxPower) {
202 SendMes(40);
203 return;
204 }
205 MoveMapSim(ADir);
206/* inlined -Don */
207#if 0
208 SetPowerBit();
209#else
210#if 1
211 SETPOWERBIT(SMapX, SMapY);
212#else
213 PowerMap[(SMapX >>4) + (SMapY <<3)] |= 1 << (SMapX & 15);
214#endif
215#endif
216 ConNum = 0;
217 Dir = 0;
218 while ((Dir < 4) && (ConNum < 2)) {
219 if (TestForCond(Dir)) {
220 ConNum++;
221 ADir = Dir;
222 }
223 Dir++;
224 }
225 if (ConNum > 1)
226 PushPowerStack();
227 } while (ConNum);
228 }
229}
230
231
232/* comefrom: DoPowerScan DoSPZone */
233PushPowerStack(void)
234{
235 if (PowerStackNum < (PWRSTKSIZE - 2)) {
236 PowerStackNum++;
237 PowerStackX[PowerStackNum] = SMapX;
238 PowerStackY[PowerStackNum] = SMapY;
239 }
240}
241
242
243/* comefrom: DoPowerScan */
244PullPowerStack(void)
245{
246 if (PowerStackNum > 0) {
247 SMapX = PowerStackX[PowerStackNum];
248 SMapY = PowerStackY[PowerStackNum];
249 PowerStackNum--;
250 }
251}
252
253
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