3 * handle binary emc cave file format
9 /* convert emc caves to intermediate cave format.
11 * the intermediate format supports most emc caves, but some internal
12 * objects are not supported.
15 * - active objects - use global flags instead of individual on/off
16 * - falling or paused objects - become still objects
17 * - sand states - become either sand with/without stone
18 * - collected objects - become a common pause object
19 * - drip states - become a normal drip
22 * - exploding objects (not in emc player either)
24 * pushed objects are supported in the cave, eaters and magic ball.
25 * they behave almost the same as in the emc player, pushing over
26 * steel wall, androids, players etc. a compile time option chooses
27 * if pushed objects go into the acid.
29 * acid is handled completely different in my player. acid top is a
30 * separate object, which can be put anywhere and the beasts will
31 * be gobbled, even if they go in from below. in the emc player, an
32 * acid top without a bottom becomes plant.
34 * borderless caves are supported, almost the same as in the emc
35 * player. going off the left edge of the screen resulted in the
36 * beast/player moving up 1 square (and the player disappeared).
37 * going off the right edge of the screen, the beast/player would
38 * go down 1 square. in my player, everything stays on the same y
39 * coord, which is sensible, but breaks caves which expect the old
43 #define GET_BE16(x) ((&x)[0] << 8 | (&x)[1])
45 static const short map_emc[256] =
47 Cstone, Cstone, Cdiamond, Cdiamond, // 0
48 Calien, Calien, Cblank, Cblank, // 4
49 Ctank_1_n, Ctank_1_e, Ctank_1_s, Ctank_1_w, // 8
50 Ctank_2_n, Ctank_2_e, Ctank_2_s, Ctank_2_w, // 12
52 Cbomb, Cbomb, Cemerald, Cemerald, // 16
53 Cbug_1_n, Cbug_1_e, Cbug_1_s, Cbug_1_w, // 20
54 Cbug_2_n, Cbug_2_e, Cbug_2_s, Cbug_2_w, // 24
55 Cdrip, Cdrip, Cdrip, Cdrip, // 28
57 Cstone, Cbomb, Cdiamond, Cemerald, // 32
58 Cwonderwall, Cnut, Cnut, Cnut, // 36
59 Cwheel, Ceater_n, Ceater_s, Ceater_w, // 40
60 Ceater_e, Csand_stone, Cblank, Cblank, // 44
62 Cblank, Csand, Csand, Csand, // 48
63 Csand_stone, Csand_stone, Csand_stone, Csand, // 52
64 Cstone, Cslide_ew, Cslide_ns, Cdynamite_1, // 56
65 Cdynamite_2, Cdynamite_3, Cdynamite_4, Cacid_s, // 60
67 Cexit_1, Cexit_2, Cexit_3, Cballoon, // 64
68 Cplant, Cspring, Cspring, Cpush_spring_w, // 68
69 Cpush_spring_e, Cball_1, Cball_2, Candroid, // 72
70 Cblank, Candroid, Candroid, Candroid, // 76
72 Candroid, Candroid, Candroid, Candroid, // 80
73 Candroid, Cblank, Cblank, Cblank, // 84
74 Cblank, Cblank, Cblank, Cblank, // 88
75 Cblank, Cblank, Cblank, Cblank, // 92
77 Cblank, Cblank, Cblank, Cpush_spring_w, // 96
78 Cpush_spring_e, Cacid_1, Cacid_2, Cacid_3, // 100
79 Cacid_4, Cacid_5, Cacid_6, Cacid_7, // 104
80 Cacid_8, Cblank, Cblank, Cblank, // 108
82 Cblank, Cblank, Cpush_nut_w, Cpush_nut_e, // 112
83 Csteel_1, Cblank, Cblank, Cpush_bomb_w, // 116
84 Cpush_bomb_e, Cpush_stone_w, Cpush_stone_e, Cblank, // 120
85 Cblank, Cblank, Cblank, Cblank, // 124
87 Cblank, Croundwall_2, Cgrass, Csteel_2, // 128
88 Cwall_2, Ckey_1, Ckey_2, Ckey_3, // 132
89 Ckey_4, Cdoor_1, Cdoor_2, Cdoor_3, // 136
90 Cdoor_4, Cfake_amoeba, Cfake_door_1, Cfake_door_2, // 140
92 Cfake_door_3, Cfake_door_4, Cwonderwall, Cwheel, // 144
93 Csand, Cacid_nw, Cacid_ne, Cacid_sw, // 148
94 Cacid_se, Cfake_blank, Camoeba_1, Camoeba_2, // 152
95 Camoeba_3, Camoeba_4, Cexit, Calpha_arrow_w, // 156
97 Cfake_grass, Clenses, Cmagnify, Cfake_blank, // 160
98 Cfake_grass, Cswitch, Cswitch, Cblank, // 164
99 Cdecor_8, Cdecor_9, Cdecor_10, Cdecor_5, // 168
100 Calpha_comma, Calpha_apost, Calpha_minus, Cdynamite, // 172
102 Csteel_3, Cdecor_6, Cdecor_7, Csteel_1, // 176
103 Croundwall_1, Cdecor_2, Cdecor_4, Cdecor_3, // 180
104 Cwind_any, Cwind_e, Cwind_s, Cwind_w, // 184
105 Cwind_n, Cdirt, Cplant, Ckey_5, // 188
107 Ckey_6, Ckey_7, Ckey_8, Cdoor_5, // 192
108 Cdoor_6, Cdoor_7, Cdoor_8, Cbumper, // 196
109 Calpha_a, Calpha_b, Calpha_c, Calpha_d, // 200
110 Calpha_e, Calpha_f, Calpha_g, Calpha_h, // 204
112 Calpha_i, Calpha_j, Calpha_k, Calpha_l, // 208
113 Calpha_m, Calpha_n, Calpha_o, Calpha_p, // 212
114 Calpha_q, Calpha_r, Calpha_s, Calpha_t, // 216
115 Calpha_u, Calpha_v, Calpha_w, Calpha_x, // 220
117 Calpha_y, Calpha_z, Calpha_0, Calpha_1, // 224
118 Calpha_2, Calpha_3, Calpha_4, Calpha_5, // 228
119 Calpha_6, Calpha_7, Calpha_8, Calpha_9, // 232
120 Calpha_perio, Calpha_excla, Calpha_colon, Calpha_quest, // 236
122 Calpha_arrow_e, Cdecor_1, Cfake_door_5, Cfake_door_6, // 240
123 Cfake_door_7, Cfake_door_8, Cblank, Cblank, // 244
124 Cblank, Cblank, Cblank, Cblank, // 248
125 Cwall_1, Cblank, Calpha_copyr, Cfake_acid_1 // 252
134 android_clone_table[] =
136 { 0, Xemerald, Cemerald },
137 { 0, Xemerald_pause, Cemerald },
138 { 0, Xemerald_fall, Cemerald },
139 { 0, Yemerald_sB, Cemerald },
140 { 0, Yemerald_eB, Cemerald },
141 { 0, Yemerald_wB, Cemerald },
143 { 1, Xdiamond, Cdiamond },
144 { 1, Xdiamond_pause, Cdiamond },
145 { 1, Xdiamond_fall, Cdiamond },
146 { 1, Ydiamond_sB, Cdiamond },
147 { 1, Ydiamond_eB, Cdiamond },
148 { 1, Ydiamond_wB, Cdiamond },
150 { 2, Xstone, Cstone },
151 { 2, Xstone_pause, Cstone },
152 { 2, Xstone_fall, Cstone },
153 { 2, Ystone_sB, Cstone },
154 { 2, Ystone_eB, Cstone },
155 { 2, Ystone_wB, Cstone },
158 { 3, Xbomb_pause, Cbomb },
159 { 3, Xbomb_fall, Cbomb },
160 { 3, Ybomb_sB, Cbomb },
161 { 3, Ybomb_eB, Cbomb },
162 { 3, Ybomb_wB, Cbomb },
165 { 4, Xnut_pause, Cnut },
166 { 4, Xnut_fall, Cnut },
167 { 4, Ynut_sB, Cnut },
168 { 4, Ynut_eB, Cnut },
169 { 4, Ynut_wB, Cnut },
171 { 5, Xtank_1_n, Ctank_1_n },
172 { 5, Xtank_2_n, Ctank_1_n },
173 { 5, Ytank_nB, Ctank_1_n },
174 { 5, Ytank_n_e, Ctank_1_n },
175 { 5, Ytank_n_w, Ctank_1_n },
176 { 5, Xtank_1_e, Ctank_1_e },
177 { 5, Xtank_2_e, Ctank_1_e },
178 { 5, Ytank_eB, Ctank_1_e },
179 { 5, Ytank_e_s, Ctank_1_e },
180 { 5, Ytank_e_n, Ctank_1_e },
181 { 5, Xtank_1_s, Ctank_1_s },
182 { 5, Xtank_2_s, Ctank_1_s },
183 { 5, Ytank_sB, Ctank_1_s },
184 { 5, Ytank_s_w, Ctank_1_s },
185 { 5, Ytank_s_e, Ctank_1_s },
186 { 5, Xtank_1_w, Ctank_1_w },
187 { 5, Xtank_2_w, Ctank_1_w },
188 { 5, Ytank_wB, Ctank_1_w },
189 { 5, Ytank_w_n, Ctank_1_w },
190 { 5, Ytank_w_s, Ctank_1_w },
192 { 6, Xeater_n, Ceater_n },
193 { 6, Yeater_nB, Ceater_n },
194 { 6, Xeater_e, Ceater_e },
195 { 6, Yeater_eB, Ceater_e },
196 { 6, Xeater_s, Ceater_s },
197 { 6, Yeater_sB, Ceater_s },
198 { 6, Xeater_w, Ceater_w },
199 { 6, Yeater_wB, Ceater_w },
201 { 7, Xbug_1_n, Cbug_2_n },
202 { 7, Xbug_2_n, Cbug_2_n },
203 { 7, Ybug_nB, Cbug_2_n },
204 { 7, Ybug_n_e, Cbug_2_n },
205 { 7, Ybug_n_w, Cbug_2_n },
206 { 7, Xbug_1_e, Cbug_2_e },
207 { 7, Xbug_2_e, Cbug_2_e },
208 { 7, Ybug_eB, Cbug_2_e },
209 { 7, Ybug_e_s, Cbug_2_e },
210 { 7, Ybug_e_n, Cbug_2_e },
211 { 7, Xbug_1_s, Cbug_2_s },
212 { 7, Xbug_2_s, Cbug_2_s },
213 { 7, Ybug_sB, Cbug_2_s },
214 { 7, Ybug_s_w, Cbug_2_s },
215 { 7, Ybug_s_e, Cbug_2_s },
216 { 7, Xbug_1_w, Cbug_2_w },
217 { 7, Xbug_2_w, Cbug_2_w },
218 { 7, Ybug_wB, Cbug_2_w },
219 { 7, Ybug_w_n, Cbug_2_w },
220 { 7, Ybug_w_s, Cbug_2_w },
222 { 8, Xalien, Calien },
223 { 8, Xalien_pause, Calien },
224 { 8, Yalien_nB, Calien },
225 { 8, Yalien_eB, Calien },
226 { 8, Yalien_sB, Calien },
227 { 8, Yalien_wB, Calien },
229 { 9, Xspring, Cspring },
230 { 9, Xspring_pause, Cspring },
231 { 9, Xspring_fall, Cspring },
232 { 9, Xspring_e, Cspring },
233 { 9, Xspring_w, Cspring },
234 { 9, Yspring_sB, Cspring },
235 { 9, Yspring_eB, Cspring },
236 { 9, Yspring_wB, Cspring },
237 { 9, Yspring_alien_eB, Cspring },
238 { 9, Yspring_alien_wB, Cspring },
240 { 10, Xballoon, Cballoon },
241 { 10, Yballoon_nB, Cballoon },
242 { 10, Yballoon_eB, Cballoon },
243 { 10, Yballoon_sB, Cballoon },
244 { 10, Yballoon_wB, Cballoon },
246 { 11, Xfake_amoeba, Cdrip },
247 { 11, Yfake_amoeba, Cdrip },
248 { 11, Xamoeba_1, Cdrip },
249 { 11, Xamoeba_2, Cdrip },
250 { 11, Xamoeba_3, Cdrip },
251 { 11, Xamoeba_4, Cdrip },
252 { 11, Xamoeba_5, Cdrip },
253 { 11, Xamoeba_6, Cdrip },
254 { 11, Xamoeba_7, Cdrip },
255 { 11, Xamoeba_8, Cdrip },
257 { 12, Xdynamite, Cdynamite },
262 static int eater_offset[8] =
264 2048, 2057, 2066, 2075,
265 2112, 2121, 2130, 2139
268 void convert_em_level(unsigned char *src, int file_version)
272 /* common to all emc caves */
277 cav.time_seconds = MIN(GET_BE16(src[2110]), 9999);
278 cav.gems_needed = src[2095];
281 cav.testmode = FALSE;
282 cav.teamwork = (src[2150] & 128) != 0;
286 cav.emerald_score = src[2084];
287 cav.diamond_score = src[2085];
288 cav.alien_score = src[2086];
289 cav.tank_score = src[2087];
290 cav.bug_score = src[2088];
291 cav.eater_score = src[2089];
292 cav.nut_score = src[2090];
293 cav.dynamite_score = src[2091];
294 cav.key_score = src[2092];
295 cav.exit_score = src[2093] * 8 / 5;
297 cav.lenses_score = src[2151];
298 cav.magnify_score = src[2152];
299 cav.slurp_score = src[2153];
303 cav.android_move_time = MIN(GET_BE16(src[2164]), 9999);
304 cav.android_clone_time = MIN(GET_BE16(src[2166]), 9999);
305 cav.ball_time = MIN(GET_BE16(src[2160]), 9999);
307 cav.lenses_time = MIN(GET_BE16(src[2154]), 9999);
308 cav.magnify_time = MIN(GET_BE16(src[2156]), 9999);
309 cav.wheel_time = MIN(GET_BE16(src[2104]), 9999);
311 cav.amoeba_time = MIN(GET_BE16(src[2100]) * 28, 9999);
312 cav.wonderwall_time = MIN(GET_BE16(src[2102]), 9999);
314 cav.wind_time = 9999;
316 cav.wind_direction = (temp & 8 ? 0 :
323 cav.ball_random = (src[2162] & 1) != 0;
324 cav.ball_active = (src[2162] & 128) != 0;
326 cav.wonderwall_active = FALSE;
327 cav.wheel_active = FALSE;
328 cav.lenses_active = FALSE;
329 cav.magnify_active = FALSE;
331 for (temp = 1; temp < 2047; temp++)
335 case 36: /* wonderwall */
336 cav.wonderwall_active = TRUE;
337 cav.wonderwall_time = 9999;
341 cav.wheel_active = TRUE;
342 cav.wheel_x = temp % 64;
343 cav.wheel_y = temp / 64;
346 case 163: /* fake blank */
347 cav.lenses_active = TRUE;
350 case 164: /* fake grass */
351 cav.magnify_active = TRUE;
358 temp = GET_BE16(src[2168]);
360 for (i = 0; i < GAME_TILE_MAX; i++)
361 cav.android_array[i] = Cblank;
363 for (i = 0; android_clone_table[i].bit_nr != -1; i++)
364 if (temp & (1 << android_clone_table[i].bit_nr))
365 cav.android_array[android_clone_table[i].clone_from] =
366 android_clone_table[i].clone_to;
370 for (i = 0; i < 8; i++)
371 for (x = 0; x < 9; x++)
372 cav.eater_array[i][x] = map_emc[src[eater_offset[i] + x]];
376 temp = map_emc[src[2159]];
378 for (y = 0; y < 8; y++)
382 for (x = 0; x < 8; x++)
383 cav.ball_array[y][x] = temp;
387 cav.ball_array[y][1] = (src[2163] & 1) ? temp : Cblank; /* north */
388 cav.ball_array[y][6] = (src[2163] & 2) ? temp : Cblank; /* south */
389 cav.ball_array[y][3] = (src[2163] & 4) ? temp : Cblank; /* west */
390 cav.ball_array[y][4] = (src[2163] & 8) ? temp : Cblank; /* east */
391 cav.ball_array[y][7] = (src[2163] & 16) ? temp : Cblank; /* southeast */
392 cav.ball_array[y][5] = (src[2163] & 32) ? temp : Cblank; /* southwest */
393 cav.ball_array[y][2] = (src[2163] & 64) ? temp : Cblank; /* northeast */
394 cav.ball_array[y][0] = (src[2163] & 128)? temp : Cblank; /* northwest */
400 for (i = 0; i < 2; i++)
402 temp = GET_BE16(src[2096 + i * 2]);
404 cav.player_x[i] = (temp & 63);
405 cav.player_y[i] = (temp >> 6 & 31);
410 /* first fill the complete playfield with the empty space element */
411 for (y = 0; y < CAVE_HEIGHT; y++)
412 for (x = 0; x < CAVE_WIDTH; x++)
413 cav.cave[x][y] = Cblank;
415 /* then copy the real level contents from level file into the playfield */
417 for (y = 0; y < cav.height; y++)
418 for (x = 0; x < cav.width; x++)
419 cav.cave[x][y] = map_emc[src[temp++]];
421 native_em_level.file_version = file_version;
425 /* convert all emerald mine caves to emc version 6 cave format.
427 * caves are filtered to get rid of invalid or unsupported tiles.
429 * although the result is a somewhat clean cave, it is meant only
430 * to give a common structure for the binary cave format. it is not
431 * for archiving purposes (it is better to keep the raw cave as-is)
432 * and it is not meant for serializing (the intermediate structure
433 * is better defined).
435 * acid top is added to acid bottom in both the cave and the eaters.
436 * fake acid (only in v4) does not exist because it adds nothing to
437 * the game, and is different even in different versions of the emc
440 * v4/v5 time is converted to 10x old time (as it should be).
441 * the reason the kingsoft player used 5x time was copy protection.
443 * note: emc v6 converter has an error in converting v4 eaters to the
444 * wrong bug(24 instead of 20) and tank(12 instead of 8).
447 /* changes for game engine integration in Rocks'n'Diamonds:
449 * cave versions below V5 used different objects than later versions
450 * - steel/wall/roundwall of type 1 was used instead of type 2
451 * - dirt was used instead of grass
452 * - wall codes 129, 131 and 132 are changed to 180, 179 and 252
453 * - object code 130 (V6 grass) is changed to 189 (V6 dirt)
454 * - object codes are changed in both cave and eater arrays
455 * - only graphical change, as changed objects behave the same
457 * acid with no base beneath it is converted to fake acid
458 * - required for downunder mine 16, level 0 (and others)
461 static const unsigned char map_v6[256] =
465 0,0,2,2, 4,4,118,118, 8,9,10,11, 12,13,14,15, // 0
466 16,16,18,18, 20,21,22,23, 24,25,26,27, 28,28,118,28, // 16
467 0,16,2,18, 36,37,37,37, 40,41,42,43, 44,45,128,128, // 32
468 128,148,148, 148,45,45,45, 148,0,57,58, 59,60,61,62,63, // 48
470 64,65,66,67, 68,69,69,71, 72,73,74,75, 118,75,75,75, // 64
471 75,75,75,75, 75,153,153,153, 153,153,153,153, 153,153,153,153, // 80
472 153,153,153,99, 100,68,68,68, 68,68,68,68, 68,118,118,118, // 96
473 118,118,114,115, 131,118,118,119, 120,121,122,118, 118,118,118,118, // 112
475 128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143, // 128
476 144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159, // 144
477 160,161,162,163, 164,165,165,118, 168,169,170,171, 172,173,174,175, // 160
478 176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,68,191, // 176
480 192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207, // 192
481 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223, // 208
482 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239, // 224
483 240,241,242,243, 244,245,153,153, 153,153,153,153, 153,153,153,153 // 240
486 static const unsigned char map_v5[256] =
490 0,0,2,2, 4,4,118,118, 8,9,10,11, 12,13,14,15, // 0
491 16,16,18,18, 20,21,22,23, 24,25,26,27, 28,28,118,28, // 16
492 0,16,2,18, 36,37,37,37, 147,41,42,43, 44,45,128,128, // 32
493 128,148,148,148, 45,45,45,148, 0,57,58,59, 60,61,62,63, // 48
495 64,65,66,67, 68,153,153,153, 153,153,153,153, 153,153,153,153, // 64
496 153,153,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153, // 80
497 153,153,153,153, 153,68,68,68, 68,68,68,68, 68,118,118,118, // 96
498 118,118,114,115, 131,118,118,119, 120,121,122,118, 118,118,118,118, // 112
500 128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143, // 128
501 144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159, // 144
502 160,153,153,153, 153,153,153,118, 168,169,170,171, 172,173,174,175, // 160
503 176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,68,153, // 176
505 153,153,153,153, 153,153,153,153, 200,201,202,203, 204,205,206,207, // 192
506 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223, // 208
507 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239, // 224
508 240,241,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153 // 240
511 static const unsigned char map_v4[256] =
515 0,0,2,2, 4,4,118,118, 8,9,10,11, 12,13,14,15, // 0
516 16,16,18,18, 20,21,22,23, 24,25,26,27, 28,28,118,28, // 16
517 0,16,2,18, 36,37,37,37, 147,41,42,43, 44,45,128,128, // 32
518 128,148,148,148, 45,45,45,148, 0,153,153,59, 60,61,62,63, // 48
520 64,65,66,153, 153,153,153,153, 153,153,153,153, 153,153,153,153, // 64
521 153,153,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153, // 80
522 153,153,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153, // 96
523 153,118,114,115, 131,118,118,119, 120,121,122,118, 118,118,118,118, // 112
525 128,180,189,179, 252,133,134,135, 136,137,138,139, 140,141,142,143, // 128
526 144,145,146,147, 148,149,150,151, 152,68,154,155, 156,157,158,160, // 144
527 160,160,160,160, 160,160,160,160, 160,160,160,160, 160,160,160,175, // 160
528 153,153,153,153, 153,153,153,153, 153,153,153,153, 153,153,68,153, // 176
530 153,153,153,153, 153,153,153,153, 200,201,202,203, 204,205,206,207, // 192
531 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223, // 208
532 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239, // 224
533 240,241,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153 // 240
536 static const unsigned char map_v4_eater[32] =
538 /* filter for v4 eater */
540 128,18,2,0, 4,8,16,20, 28,37,41,45, 189,180,179,252, // 0
541 133,134,135,136, 146,147,175,65, 66,64,2,18, 128,128,128,128 // 16
544 static boolean filename_has_v1_format(char *filename)
546 char *basename = getBaseNamePtr(filename);
548 return (strlen(basename) == 3 &&
549 basename[0] == 'a' &&
550 basename[1] >= 'a' && basename[1] <= 'k' &&
551 basename[2] >= '0' && basename[2] <= '9');
554 int cleanup_em_level(unsigned char *src, int length, char *filename)
556 int file_version = FILE_VERSION_EM_UNKNOWN;
559 if (length >= 2172 &&
560 src[2106] == 255 && /* version id: */
561 src[2107] == 54 && /* '6' */
562 src[2108] == 48 && /* '0' */
563 src[2109] == 48) /* '0' */
565 /* ---------- this cave has V6 file format ---------- */
566 file_version = FILE_VERSION_EM_V6;
568 /* remap elements to internal EMC level format */
569 for (i = 0; i < 2048; i++) /* cave */
570 src[i] = map_v6[src[i]];
571 for (i = 2048; i < 2084; i++) /* eaters */
572 src[i] = map_v6[src[i]];
573 for (i = 2112; i < 2148; i++) /* eaters */
574 src[i] = map_v6[src[i]];
576 else if (length >= 2110 &&
577 src[2106] == 255 && /* version id: */
578 src[2107] == 53 && /* '5' */
579 src[2108] == 48 && /* '0' */
580 src[2109] == 48) /* '0' */
582 /* ---------- this cave has V5 file format ---------- */
583 file_version = FILE_VERSION_EM_V5;
585 /* remap elements to internal EMC level format */
586 for (i = 0; i < 2048; i++) /* cave */
587 src[i] = map_v5[src[i]];
588 for (i = 2048; i < 2084; i++) /* eaters */
589 src[i] = map_v5[src[i]];
590 for (i = 2112; i < 2148; i++) /* eaters */
591 src[i] = src[i - 64];
593 else if (length >= 2106 &&
594 (src[1983] == 27 || /* encrypted (only EM I/II/III) */
595 src[1983] == 116 || /* unencrypted (usual case) */
596 src[1983] == 131)) /* unencrypted (rare case) */
598 /* ---------- this cave has V1, V2 or V3 file format ---------- */
600 boolean fix_copyright = FALSE;
603 byte at position 1983 (0x07bf) is used as "magic byte":
604 - 27 (0x1b) => encrypted level (V3 only / Kingsoft original games)
605 - 116 (0x74) => unencrypted level (byte is corrected to 131 (0x83))
606 - 131 (0x83) => unencrypted level (happens only in very rare cases)
609 if (src[1983] == 27) /* (0x1b) -- after decryption: 116 (0x74) */
611 /* this is original (encrypted) Emerald Mine I, II or III level file */
613 int first_byte = src[0];
614 unsigned char code0 = 0x65;
615 unsigned char code1 = 0x11;
617 /* decode encrypted level data */
618 for (i = 0; i < 2106; i++)
623 code0 = (code0 + 7) & 0xff;
626 src[1] = 131; /* needed for all Emerald Mine levels */
628 /* first byte is either 0xf1 (EM I and III) or 0xf5 (EM II) */
629 if (first_byte == 0xf5)
631 src[0] = 131; /* only needed for Emerald Mine II levels */
633 fix_copyright = TRUE;
636 /* ---------- this cave has V3 file format ---------- */
637 file_version = FILE_VERSION_EM_V3;
639 else if (filename_has_v1_format(filename))
641 /* ---------- this cave has V1 file format ---------- */
642 file_version = FILE_VERSION_EM_V1;
646 /* ---------- this cave has V2 file format ---------- */
647 file_version = FILE_VERSION_EM_V2;
650 /* remap elements to internal EMC level format */
651 for (i = 0; i < 2048; i++) /* cave */
652 src[i] = map_v4[src[i]];
653 for (i = 2048; i < 2084; i++) /* eaters */
654 src[i] = map_v4_eater[src[i] % 32];
655 for (i = 2112; i < 2148; i++) /* eaters */
656 src[i] = src[i - 64];
658 if (fix_copyright) /* fix "(c)" sign in Emerald Mine II levels */
660 for (i = 0; i < 2048; i++)
662 src[i] = 254; /* replace 'Cdecor_1' with 'Calpha_copyr' */
667 /* ---------- this cave has unknown file format ---------- */
669 /* if file has length of old-style level file, print (wrong) magic byte */
671 Error(ERR_WARN, "unknown magic byte 0x%02x at position 0x%04x",
674 return FILE_VERSION_EM_UNKNOWN;
677 if (file_version < FILE_VERSION_EM_V6)
680 src[2106] = 255; /* version id: */
681 src[2107] = 54; /* '6' */
682 src[2108] = 48; /* '0' */
683 src[2109] = 48; /* '0' */
687 /* stored level time of levels for the V2 player was changed to 50% of the
688 time for the V1 player (original V3 levels already considered this) */
689 if (file_version != FILE_VERSION_EM_V1 &&
690 file_version != FILE_VERSION_EM_V3)
695 for (i = 2148; i < 2172; i++)
702 /* ---------- at this stage, the cave data always has V6 format ---------- */
705 for (i = 0; i < 2048; i++)
708 for (i++; i < 2048; i++)
713 for (i = 64; i < 2048; i++)
714 if (src[i] == 63) /* replace element above 'Cacid_s' ... */
715 src[i - 64] = 101; /* ... with 'Cacid_1' */
717 /* fix acid with no base beneath it (see comment above for details) */
718 for (i = 64; i < 2048 - 1; i++)
720 if (file_version <= FILE_VERSION_EM_V2 &&
721 src[i - 64] == 101 && src[i] != 63) /* acid without base */
723 if (src[i - 1] == 101 || /* remove acid over acid row */
725 src[i - 64] = 6; /* replace element above with 'Cblank' */
727 src[i - 64] = 255; /* replace element above with 'Cfake_acid_1' */
731 /* fix acid in eaters */
732 for (i = 0; i < 8; i++)
733 for (j = 0; j < 6; j++)
734 if (src[eater_offset[i] + j + 3] == 63)
735 src[eater_offset[i] + j] = 101;
740 /* set cave tile at player position to blank */
741 for (i = 0; i < 2; i++)
742 src[GET_BE16(src[2096 + i * 2]) % 2048] = 128;
752 src[2159] = map_v6[src[2159]];
762 /* size of v6 cave */
766 Error(ERR_DEBUG, "EM level file version: %d", file_version);
775 structure of emerald mine level disk files
776 ----------------------------------------------------------------------
778 if(len >= 2172 && (buf[2106] == 255 && buf[2107] == 54 && buf[2108] == 48 && buf[2109] == 48)) // v6
779 if(len >= 2110 && (buf[2106] == 255 && buf[2107] == 53 && buf[2108] == 48 && buf[2109] == 48)) // v5
780 if(len >= 2106 && (buf[1983] == 116 || buf[2047] == 116)) // v4
781 if(len >= 2106 && (buf[1983] == 27 || buf[2047] == 219)) // v3
783 buf[0]=241;buf[1]=248;for(i=0,j=101;i<2106;i++,j+=7)buf[i]=(buf[i]^j)-17; // decrypt
785 number of movements (calls to logic) = time * 50 / 8
787 {} reserved (but some broken levels use them)
789 ----------------------------------------------------------------------
809 2095: emeralds needed
813 2102: wonderwall time
815 2106: ID (0xff363030)
821 2148: flags bit#7=NOI #6=RIS
822 2149: wind direction bit#0=right #1=down #2=left #3=up
823 2150: cave number bit#7=teamwork
832 2162: ball info bit#15=switch state #8=random
833 ; bit#0=N #1=S #2=W #3=E #4=SE #5=SW #6=NE #7=NW
834 2164: android move speed
835 2166: android clone speed
837 ; bit#0=emerald #1=diamond #2=stone #3=bomb #4=nut #5=tank #6=eater
838 ; #7=bug #8=alien #9=spring #10=balloon #11=ameuba #12=dynamite
843 1: stone {stone_fall}
845 3: diamond {diamond_fall}
847 5: alien {alien_pause}
861 19: emerald {emerald_fall}
872 30: blank {drip_stretchB}
873 31: drip {drip_stretch}
874 32: stone {stone_pause}
875 33: bomb {bomb_pause}
876 34: diamond {diamond_pause}
877 35: emerald {emerald_pause}
878 36: wonderwall {wonderwallB}
888 46: blank {sand_stonein_2}
889 47: blank {sand_stonein_3}
890 48: blank {sand_stonein_4}
891 49: sand {sand_stonesand_2}
892 50: sand {sand_stonesand_3}
893 51: sand {sand_stonesand_4}
894 52: sand_stone {sand_sandstone_2}
895 53: sand_stone {sand_sandstone_3}
896 54: sand_stone {sand_sandstone_4}
897 55: sand {sand_stonesand_4}
898 56: stone {sand_stoneout_2}
912 70: spring {spring_fall}
913 71: spring {spring_w}
914 72: spring {spring_e}
919 77: android {android_n_1}
920 78: android {android_n_2}
921 79: android {android_s_1}
922 80: android {android_s_2}
923 81: android {android_e_1}
924 82: android {android_e_2}
925 83: android {android_w_1}
926 84: android {android_w_2}
941 99: spring {push_spring_w}
942 100: spring {push_spring_e}
951 109: pause {grass_wB}
952 110: pause {grass_eB}
953 111: pause {grass_nB}
954 112: pause {grass_sB}
955 113: pause {dynamite_blank}
956 114: nut {push_nut_w}
957 115: nut {push_nut_e}
958 116: steel_2 {end of level}
960 118: pause {emerald_blank}
961 119: bomb {push_bomb_w}
962 120: bomb {push_bomb_e}
963 121: stone {push_stone_w}
964 122: stone {push_stone_e}
965 123: pause {diamond_blank}
1006 163: fake_blank {fake_blankB}
1007 164: fake_grass {fake_grassB}
1009 166: switch {switchB}
1100 ----------------------------------------------------------------------
1116 2091: dynamite value
1120 2095: emeralds needed
1124 2102: wonderwall time
1126 2106: ID (0xff353030)
1130 1: stone {stone_fall}
1132 3: diamond {diamond_fall}
1134 5: alien {alien_pause}
1146 17: bomb {bomb_fall}
1148 19: emerald {emerald_fall}
1158 29: drip {drip_fall}
1159 30: blank {drip_stretchB}
1160 31: drip {drip_stretch}
1161 32: stone {stone_pause}
1162 33: bomb {bomb_pause}
1163 34: diamond {diamond_pause}
1164 35: emerald {emerald_pause}
1165 36: wonderwall {wonderwallB}
1175 46: blank {sand_stonein_2}
1176 47: blank {sand_stonein_3}
1177 48: blank {sand_stonein_4}
1178 49: sand {sand_stonesand_2}
1179 50: sand {sand_stonesand_3}
1180 51: sand {sand_stonesand_4}
1181 52: sand_stone {sand_sandstone_2}
1182 53: sand_stone {sand_sandstone_3}
1183 54: sand_stone {sand_sandstone_4}
1184 55: sand {sand_stonesand_4}
1185 56: stone {sand_stoneout_2}
1238 109: pause {grass_wB}
1239 110: pause {grass_eB}
1240 111: pause {grass_nB}
1241 112: pause {grass_sB}
1242 113: pause {dynamite_blank}
1243 114: nut {push_nut_w}
1244 115: nut {push_nut_e}
1245 116: steel_2 {end of level}
1246 117: dynamite_4 {boom_2}
1247 118: pause {emerald_blank}
1248 119: bomb {push_bomb_w}
1249 120: bomb {push_bomb_e}
1250 121: stone {push_stone_w}
1251 122: stone {push_stone_e}
1252 123: pause {diamond_blank}
1253 124: pause {dirt_wB}
1254 125: pause {dirt_eB}
1255 126: pause {dirt_nB}
1256 127: pause {dirt_sB}
1387 ----------------------------------------------------------------------
1403 2091: dynamite value
1407 2095: emeralds needed
1411 2102: wonderwall time
1441 26: diamond {diamond_shine}
1442 27: emerald {emerald_shine}
1445 1: stone {stone_fall}
1447 3: diamond {diamond_fall}
1449 5: alien {alien_pause}
1461 17: bomb {bomb_fall}
1463 19: emerald {emerald_fall}
1473 29: drip {drip_fall}
1474 30: blank {drip_stretchB}
1475 31: drip {drip_stretch}
1476 32: stone {stone_pause}
1477 33: bomb {bomb_pause}
1478 34: diamond {diamond_pause}
1479 35: emerald {emerald_pause}
1480 36: wonderwall {wonderwallB}
1490 46: blank {sand_stonein_2}
1491 47: blank {sand_stonein_3}
1492 48: blank {sand_stonein_4}
1493 49: sand {sand_stonesand_2}
1494 50: sand {sand_stonesand_3}
1495 51: sand {sand_stonesand_4}
1496 52: sand_stone {sand_sandstone_2}
1497 53: sand_stone {sand_sandstone_3}
1498 54: sand_stone {sand_sandstone_4}
1499 55: sand {sand_stonesand_4}
1500 56: stone {sand_stoneout_2}
1557 113: pause {dynamite_blank}
1558 114: nut {push_nut_w}
1559 115: nut {push_nut_e}
1560 116: steel_1 {end of level}
1561 117: dynamite_4 {boom_2}
1562 118: pause {emerald_blank}
1563 119: bomb {push_bomb_w}
1564 120: bomb {push_bomb_e}
1565 121: stone {push_stone_w}
1566 122: stone {push_stone_e}
1567 123: pause {diamond_blank}
1568 124: pause {dirt_wB}
1569 125: pause {dirt_eB}
1570 126: pause {dirt_nB}
1571 127: pause {dirt_sB}
1604 159: fake_grass {dirt}
1605 160: fake_grass {dirt}
1606 161: fake_grass {dirt}
1607 162: fake_grass {dirt}
1608 163: fake_grass {dirt}
1609 164: fake_grass {dirt}
1610 165: fake_grass {dirt}
1611 166: fake_grass {dirt}
1612 167: fake_grass {dirt}
1613 168: fake_grass {dirt}
1614 169: fake_grass {dirt}
1615 170: fake_grass {dirt}
1616 171: fake_grass {dirt}
1617 172: fake_grass {dirt}
1618 173: fake_grass {dirt}
1619 174: fake_grass {dirt}
1685 240: alpha_arrow_e {}
1686 241: decor_1 {alpha_copyr}
1702 ----------------------------------------------------------------------