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_raw[256] =
47 Cstone, Cstone, Cdiamond, Cdiamond, // 0
48 Calien, Calien, Cpause, Cpause, // 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
51 Cbomb, Cbomb, Cemerald, Cemerald, // 16
52 Cbug_1_n, Cbug_1_e, Cbug_1_s, Cbug_1_w, // 20
53 Cbug_2_n, Cbug_2_e, Cbug_2_s, Cbug_2_w, // 24
54 Cdrip, Cdrip, Cblank, Cdrip, // 28
55 Cstone, Cbomb, Cdiamond, Cemerald, // 32
56 Cwonderwall, Cnut, Cnut, Cnut, // 36
57 Cwheel, Ceater_n, Ceater_s, Ceater_w, // 40
58 Ceater_e, Csand_stone, Cblank, Cblank, // 44
59 Cblank, Csand, Csand, Csand, // 48
60 Csand_stone, Csand_stone, Csand_stone, Csand, // 52
61 Cstone, Cslide_ew, Cslide_ns, Cdynamite_1, // 56
62 Cdynamite_2, Cdynamite_3, Cdynamite_4, Cacid_s, // 60
64 Cexit_1, Cexit_2, Cexit_3, Cballoon, // 64
65 Cplant, Cspring, Cspring, Cpush_spring_w, // 68
66 Cpush_spring_e, Cball_1, Cball_2, Candroid, // 72
67 Cpause, Candroid, Candroid, Candroid, // 76
68 Candroid, Candroid, Candroid, Candroid, // 80
69 Candroid, Cblank, Cblank, Cblank, // 84
70 Cblank, Cblank, Cblank, Cblank, // 88
71 Cblank, Cblank, Cblank, Cblank, // 92
72 Cblank, Cblank, Cblank, Cpush_spring_w, // 96
73 Cpush_spring_e, Cacid_1, Cacid_2, Cacid_3, // 100
74 Cacid_4, Cacid_5, Cacid_6, Cacid_7, // 104
75 Cacid_8, Cpause, Cpause, Cpause, // 108
76 Cpause, Cpause, Cpush_nut_w, Cpush_nut_e, // 112
77 Csteel_1, Cdynamite_4, Cblank, Cpush_bomb_w, // 116
78 Cpush_bomb_e, Cpush_stone_w, Cpush_stone_e, Cpause, // 120
79 Cpause, Cpause, Cpause, Cpause, // 124
81 Cblank, Croundwall_2, Cgrass, Csteel_2, // 128
82 Cwall_2, Ckey_1, Ckey_2, Ckey_3, // 132
83 Ckey_4, Cdoor_1, Cdoor_2, Cdoor_3, // 136
84 Cdoor_4, Cfake_amoeba, Cfake_door_1, Cfake_door_2, // 140
85 Cfake_door_3, Cfake_door_4, Cwonderwall, Cwheel, // 144
86 Csand, Cacid_nw, Cacid_ne, Cacid_sw, // 148
87 Cacid_se, Cfake_blank, Camoeba_1, Camoeba_2, // 152
88 Camoeba_3, Camoeba_4, Cexit, Calpha_arrow_w, // 156
89 Cfake_grass, Clenses, Cmagnify, Cfake_blank, // 160
90 Cfake_grass, Cswitch, Cswitch, Cpause, // 164
91 Cdecor_8, Cdecor_9, Cdecor_10, Cdecor_5, // 168
92 Calpha_comma, Calpha_apost, Calpha_minus, Cdynamite, // 172
93 Csteel_3, Cdecor_6, Cdecor_7, Csteel_1, // 176
94 Croundwall_1, Cdecor_2, Cdecor_4, Cdecor_3, // 180
95 Cwind_any, Cwind_e, Cwind_s, Cwind_w, // 184
96 Cwind_n, Cdirt, Cplant, Ckey_5, // 188
98 Ckey_6, Ckey_7, Ckey_8, Cdoor_5, // 192
99 Cdoor_6, Cdoor_7, Cdoor_8, Cbumper, // 196
100 Calpha_a, Calpha_b, Calpha_c, Calpha_d, // 200
101 Calpha_e, Calpha_f, Calpha_g, Calpha_h, // 204
102 Calpha_i, Calpha_j, Calpha_k, Calpha_l, // 208
103 Calpha_m, Calpha_n, Calpha_o, Calpha_p, // 212
104 Calpha_q, Calpha_r, Calpha_s, Calpha_t, // 216
105 Calpha_u, Calpha_v, Calpha_w, Calpha_x, // 220
106 Calpha_y, Calpha_z, Calpha_0, Calpha_1, // 224
107 Calpha_2, Calpha_3, Calpha_4, Calpha_5, // 228
108 Calpha_6, Calpha_7, Calpha_8, Calpha_9, // 232
109 Calpha_perio, Calpha_excla, Calpha_colon, Calpha_quest, // 236
110 Calpha_arrow_e, Cdecor_1, Cfake_door_5, Cfake_door_6, // 240
111 Cfake_door_7, Cfake_door_8, Cblank, Cblank, // 244
112 Camoeba_5, Camoeba_6, Camoeba_7, Camoeba_8, // 248
113 Cwall_1, Cblank, Calpha_copyr, Cfake_acid_1 // 252
116 static const short swap_emc[CAVE_TILE_MAX] =
121 [Csteel_1] = Csteel_2,
122 [Csteel_2] = Csteel_1,
127 [Croundwall_1] = Croundwall_2,
128 [Croundwall_2] = Croundwall_1
137 android_clone_table[] =
139 { 0, Xemerald, Cemerald },
140 { 0, Xemerald_pause, Cemerald },
141 { 0, Xemerald_fall, Cemerald },
142 { 0, Yemerald_sB, Cemerald },
143 { 0, Yemerald_eB, Cemerald },
144 { 0, Yemerald_wB, Cemerald },
146 { 1, Xdiamond, Cdiamond },
147 { 1, Xdiamond_pause, Cdiamond },
148 { 1, Xdiamond_fall, Cdiamond },
149 { 1, Ydiamond_sB, Cdiamond },
150 { 1, Ydiamond_eB, Cdiamond },
151 { 1, Ydiamond_wB, Cdiamond },
153 { 2, Xstone, Cstone },
154 { 2, Xstone_pause, Cstone },
155 { 2, Xstone_fall, Cstone },
156 { 2, Ystone_sB, Cstone },
157 { 2, Ystone_eB, Cstone },
158 { 2, Ystone_wB, Cstone },
161 { 3, Xbomb_pause, Cbomb },
162 { 3, Xbomb_fall, Cbomb },
163 { 3, Ybomb_sB, Cbomb },
164 { 3, Ybomb_eB, Cbomb },
165 { 3, Ybomb_wB, Cbomb },
168 { 4, Xnut_pause, Cnut },
169 { 4, Xnut_fall, Cnut },
170 { 4, Ynut_sB, Cnut },
171 { 4, Ynut_eB, Cnut },
172 { 4, Ynut_wB, Cnut },
174 { 5, Xtank_1_n, Ctank_1_n },
175 { 5, Xtank_2_n, Ctank_1_n },
176 { 5, Ytank_nB, Ctank_1_n },
177 { 5, Ytank_n_e, Ctank_1_n },
178 { 5, Ytank_n_w, Ctank_1_n },
179 { 5, Xtank_1_e, Ctank_1_e },
180 { 5, Xtank_2_e, Ctank_1_e },
181 { 5, Ytank_eB, Ctank_1_e },
182 { 5, Ytank_e_s, Ctank_1_e },
183 { 5, Ytank_e_n, Ctank_1_e },
184 { 5, Xtank_1_s, Ctank_1_s },
185 { 5, Xtank_2_s, Ctank_1_s },
186 { 5, Ytank_sB, Ctank_1_s },
187 { 5, Ytank_s_w, Ctank_1_s },
188 { 5, Ytank_s_e, Ctank_1_s },
189 { 5, Xtank_1_w, Ctank_1_w },
190 { 5, Xtank_2_w, Ctank_1_w },
191 { 5, Ytank_wB, Ctank_1_w },
192 { 5, Ytank_w_n, Ctank_1_w },
193 { 5, Ytank_w_s, Ctank_1_w },
195 { 6, Xeater_n, Ceater_n },
196 { 6, Yeater_nB, Ceater_n },
197 { 6, Xeater_e, Ceater_e },
198 { 6, Yeater_eB, Ceater_e },
199 { 6, Xeater_s, Ceater_s },
200 { 6, Yeater_sB, Ceater_s },
201 { 6, Xeater_w, Ceater_w },
202 { 6, Yeater_wB, Ceater_w },
204 { 7, Xbug_1_n, Cbug_2_n },
205 { 7, Xbug_2_n, Cbug_2_n },
206 { 7, Ybug_nB, Cbug_2_n },
207 { 7, Ybug_n_e, Cbug_2_n },
208 { 7, Ybug_n_w, Cbug_2_n },
209 { 7, Xbug_1_e, Cbug_2_e },
210 { 7, Xbug_2_e, Cbug_2_e },
211 { 7, Ybug_eB, Cbug_2_e },
212 { 7, Ybug_e_s, Cbug_2_e },
213 { 7, Ybug_e_n, Cbug_2_e },
214 { 7, Xbug_1_s, Cbug_2_s },
215 { 7, Xbug_2_s, Cbug_2_s },
216 { 7, Ybug_sB, Cbug_2_s },
217 { 7, Ybug_s_w, Cbug_2_s },
218 { 7, Ybug_s_e, Cbug_2_s },
219 { 7, Xbug_1_w, Cbug_2_w },
220 { 7, Xbug_2_w, Cbug_2_w },
221 { 7, Ybug_wB, Cbug_2_w },
222 { 7, Ybug_w_n, Cbug_2_w },
223 { 7, Ybug_w_s, Cbug_2_w },
225 { 8, Xalien, Calien },
226 { 8, Xalien_pause, Calien },
227 { 8, Yalien_nB, Calien },
228 { 8, Yalien_eB, Calien },
229 { 8, Yalien_sB, Calien },
230 { 8, Yalien_wB, Calien },
232 { 9, Xspring, Cspring },
233 { 9, Xspring_pause, Cspring },
234 { 9, Xspring_fall, Cspring },
235 { 9, Xspring_e, Cspring },
236 { 9, Xspring_w, Cspring },
237 { 9, Yspring_sB, Cspring },
238 { 9, Yspring_eB, Cspring },
239 { 9, Yspring_wB, Cspring },
240 { 9, Yspring_alien_eB, Cspring },
241 { 9, Yspring_alien_wB, Cspring },
243 { 10, Xballoon, Cballoon },
244 { 10, Yballoon_nB, Cballoon },
245 { 10, Yballoon_eB, Cballoon },
246 { 10, Yballoon_sB, Cballoon },
247 { 10, Yballoon_wB, Cballoon },
249 { 11, Xfake_amoeba, Cdrip },
250 { 11, Yfake_amoeba, Cdrip },
251 { 11, Xamoeba_1, Cdrip },
252 { 11, Xamoeba_2, Cdrip },
253 { 11, Xamoeba_3, Cdrip },
254 { 11, Xamoeba_4, Cdrip },
255 { 11, Xamoeba_5, Cdrip },
256 { 11, Xamoeba_6, Cdrip },
257 { 11, Xamoeba_7, Cdrip },
258 { 11, Xamoeba_8, Cdrip },
260 { 12, Xdynamite, Cdynamite },
265 static int eater_offset[8] =
267 2048, 2057, 2066, 2075,
268 2112, 2121, 2130, 2139
271 void convert_em_level(unsigned char *src, int file_version)
276 /* initialize element mapping */
278 for (i = 0; i < 256; i++)
279 map_emc[i] = map_emc_raw[i];
281 /* swap tiles for pre-EMC caves (older than V5/V6), if needed */
283 if (swapTiles_EM(file_version < FILE_VERSION_EM_V5))
284 for (i = 0; i < 256; i++)
285 if (swap_emc[map_emc[i]] != 0)
286 map_emc[i] = swap_emc[map_emc[i]];
288 /* common to all emc caves */
293 cav.time_seconds = MIN(GET_BE16(src[2110]), 9999);
294 cav.gems_needed = src[2095];
297 cav.testmode = FALSE;
298 cav.teamwork = (src[2150] & 128) != 0;
302 cav.emerald_score = src[2084];
303 cav.diamond_score = src[2085];
304 cav.alien_score = src[2086];
305 cav.tank_score = src[2087];
306 cav.bug_score = src[2088];
307 cav.eater_score = src[2089];
308 cav.nut_score = src[2090];
309 cav.dynamite_score = src[2091];
310 cav.key_score = src[2092];
311 cav.exit_score = src[2093] * 8 / 5;
313 cav.lenses_score = src[2151];
314 cav.magnify_score = src[2152];
315 cav.slurp_score = src[2153];
319 cav.android_move_time = MIN(GET_BE16(src[2164]), 9999);
320 cav.android_clone_time = MIN(GET_BE16(src[2166]), 9999);
321 cav.ball_time = MIN(GET_BE16(src[2160]), 9999);
323 cav.lenses_time = MIN(GET_BE16(src[2154]), 9999);
324 cav.magnify_time = MIN(GET_BE16(src[2156]), 9999);
325 cav.wheel_time = MIN(GET_BE16(src[2104]), 9999);
327 cav.amoeba_time = MIN(GET_BE16(src[2100]) * 28, 9999);
328 cav.wonderwall_time = MIN(GET_BE16(src[2102]), 9999);
330 cav.wind_time = 9999;
332 cav.wind_direction = (temp & 8 ? 0 :
339 cav.ball_random = (src[2162] & 1) != 0;
340 cav.ball_active = (src[2162] & 128) != 0;
342 cav.wonderwall_active = FALSE;
343 cav.wheel_active = FALSE;
344 cav.lenses_active = FALSE;
345 cav.magnify_active = FALSE;
347 for (temp = 1; temp < 2047; temp++)
351 case 36: /* wonderwall */
352 cav.wonderwall_active = TRUE;
353 cav.wonderwall_time = 9999;
357 cav.wheel_active = TRUE;
358 cav.wheel_x = temp % 64;
359 cav.wheel_y = temp / 64;
362 case 163: /* fake blank */
363 cav.lenses_active = TRUE;
366 case 164: /* fake grass */
367 cav.magnify_active = TRUE;
374 temp = GET_BE16(src[2168]);
376 for (i = 0; i < GAME_TILE_MAX; i++)
377 cav.android_array[i] = Cblank;
379 for (i = 0; android_clone_table[i].bit_nr != -1; i++)
380 if (temp & (1 << android_clone_table[i].bit_nr))
381 cav.android_array[android_clone_table[i].clone_from] =
382 android_clone_table[i].clone_to;
386 for (i = 0; i < 8; i++)
387 for (x = 0; x < 9; x++)
388 cav.eater_array[i][x] = map_emc[src[eater_offset[i] + x]];
392 temp = map_emc[src[2159]];
394 for (y = 0; y < 8; y++)
398 for (x = 0; x < 8; x++)
399 cav.ball_array[y][x] = temp;
403 cav.ball_array[y][1] = (src[2163] & 1) ? temp : Cblank; /* north */
404 cav.ball_array[y][6] = (src[2163] & 2) ? temp : Cblank; /* south */
405 cav.ball_array[y][3] = (src[2163] & 4) ? temp : Cblank; /* west */
406 cav.ball_array[y][4] = (src[2163] & 8) ? temp : Cblank; /* east */
407 cav.ball_array[y][7] = (src[2163] & 16) ? temp : Cblank; /* southeast */
408 cav.ball_array[y][5] = (src[2163] & 32) ? temp : Cblank; /* southwest */
409 cav.ball_array[y][2] = (src[2163] & 64) ? temp : Cblank; /* northeast */
410 cav.ball_array[y][0] = (src[2163] & 128)? temp : Cblank; /* northwest */
416 for (i = 0; i < 2; i++)
418 temp = GET_BE16(src[2096 + i * 2]);
420 cav.player_x[i] = (temp & 63);
421 cav.player_y[i] = (temp >> 6 & 31);
426 /* first fill the complete playfield with the empty space element */
427 for (y = 0; y < CAVE_HEIGHT; y++)
428 for (x = 0; x < CAVE_WIDTH; x++)
429 cav.cave[x][y] = Cblank;
431 /* then copy the real level contents from level file into the playfield */
433 for (y = 0; y < cav.height; y++)
434 for (x = 0; x < cav.width; x++)
435 cav.cave[x][y] = map_emc[src[temp++]];
437 native_em_level.file_version = file_version;
441 /* convert all emerald mine caves to emc version 6 cave format.
443 * caves are filtered to get rid of invalid or unsupported tiles.
445 * although the result is a somewhat clean cave, it is meant only
446 * to give a common structure for the binary cave format. it is not
447 * for archiving purposes (it is better to keep the raw cave as-is)
448 * and it is not meant for serializing (the intermediate structure
449 * is better defined).
451 * acid top is added to acid bottom in both the cave and the eaters.
452 * fake acid (only in v4) does not exist because it adds nothing to
453 * the game, and is different even in different versions of the emc
456 * v4/v5 time is converted to 10x old time (as it should be).
457 * the reason the kingsoft player used 5x time was copy protection.
459 * note: emc v6 converter has an error in converting v4 eaters to the
460 * wrong bug(24 instead of 20) and tank(12 instead of 8).
463 /* changes for game engine integration in Rocks'n'Diamonds:
465 * cave versions below V5 used different objects than later versions
466 * - steel/wall/roundwall of type 1 was used instead of type 2
467 * - dirt was used instead of grass
468 * - wall codes 129, 131 and 132 are changed to 180, 179 and 252
469 * - object code 130 (V6 grass) is changed to 189 (V6 dirt)
470 * - object codes are changed in both cave and eater arrays
471 * - only graphical change, as changed objects behave the same
473 * acid with no base beneath it is converted to fake acid
474 * - required for downunder mine 16, level 0 (and others)
477 static const unsigned char map_v6[256] =
481 0,0,2,2, 4,4,118,118, 8,9,10,11, 12,13,14,15, // 0
482 16,16,18,18, 20,21,22,23, 24,25,26,27, 28,28,128,28, // 16
483 0,16,2,18, 36,37,37,37, 40,41,42,43, 44,45,128,128, // 32
484 128,148,148,148, 45,45,45,148, 0,57,58,59, 60,61,62,63, // 48
486 64,65,66,67, 68,69,69,71, 72,73,74,75, 118,75,75,75, // 64
487 75,75,75,75, 75,153,153,153, 153,153,153,153, 153,153,153,153, // 80
488 153,153,153,99, 100,68,68,68, 68,68,68,68, 68,118,118,118, // 96
489 118,118,114,115, 131,118,118,119, 120,121,122,118, 118,118,118,118, // 112
491 128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143, // 128
492 144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159, // 144
493 160,161,162,163, 164,165,165,118, 168,169,170,171, 172,173,174,175, // 160
494 176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,68,191, // 176
496 192,193,194,195, 196,197,198,199, 200,201,202,203, 204,205,206,207, // 192
497 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223, // 208
498 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239, // 224
499 240,241,242,243, 244,245,153,153, 153,153,153,153, 153,153,153,153 // 240
502 static const unsigned char map_v5[256] =
506 0,0,2,2, 4,4,118,118, 8,9,10,11, 12,13,14,15, // 0
507 16,16,18,18, 20,21,22,23, 24,25,26,27, 28,28,128,28, // 16
508 0,16,2,18, 36,37,37,37, 147,41,42,43, 44,45,128,128, // 32
509 128,148,148,148, 45,45,45,148, 0,57,58,59, 60,61,62,63, // 48
511 64,65,66,67, 68,153,153,153, 153,153,153,153, 153,153,153,153, // 64
512 153,153,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153, // 80
513 153,153,153,153, 153,68,68,68, 68,68,68,68, 68,118,118,118, // 96
514 118,118,114,115, 131,62,118,119, 120,121,122,118, 118,118,118,118, // 112
516 128,129,130,131, 132,133,134,135, 136,137,138,139, 140,141,142,143, // 128
517 144,145,146,147, 148,149,150,151, 152,153,154,155, 156,157,158,159, // 144
518 160,153,153,153, 153,153,153,118, 168,169,170,171, 172,173,174,175, // 160
519 176,177,178,179, 180,181,182,183, 184,185,186,187, 188,189,68,153, // 176
521 153,153,153,153, 153,153,153,153, 200,201,202,203, 204,205,206,207, // 192
522 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223, // 208
523 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239, // 224
524 240,241,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153 // 240
527 static const unsigned char map_v4[256] =
531 0,0,2,2, 4,4,118,118, 8,9,10,11, 12,13,14,15, // 0
532 16,16,18,18, 20,21,22,23, 24,25,26,27, 28,28,128,28, // 16
533 0,16,2,18, 36,37,37,37, 147,41,42,43, 44,45,128,128, // 32
534 128,148,148,148, 45,45,45,148, 0,153,153,59, 60,61,62,63, // 48
536 64,65,66,153, 153,153,153,153, 153,153,153,153, 153,153,153,153, // 64
537 153,153,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153, // 80
538 153,153,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153, // 96
539 153,118,114,115, 179,62,118,119, 120,121,122,118, 118,118,118,118, // 112
541 128,180,189,179, 252,133,134,135, 136,137,138,139, 140,141,142,143, // 128
542 144,145,146,147, 148,149,150,151, 152,68,248,249, 250,251,158,160, // 144
543 160,160,160,160, 160,160,160,160, 160,160,160,160, 160,160,160,175, // 160
544 153,153,153,153, 153,153,153,153, 153,153,153,153, 153,153,68,153, // 176
546 153,153,153,153, 153,153,153,153, 200,201,202,203, 204,205,206,207, // 192
547 208,209,210,211, 212,213,214,215, 216,217,218,219, 220,221,222,223, // 208
548 224,225,226,227, 228,229,230,231, 232,233,234,235, 236,237,238,239, // 224
549 240,241,153,153, 153,153,153,153, 153,153,153,153, 153,153,153,153 // 240
552 static const unsigned char map_v4_eater[32] =
554 /* filter for v4 eater */
556 128,18,2,0, 4,8,16,20, 28,37,41,45, 189,180,179,252, // 0
557 133,134,135,136, 146,147,175,65, 66,64,2,18, 128,128,128,128 // 16
560 static boolean filename_has_v1_format(char *filename)
562 char *basename = getBaseNamePtr(filename);
564 return (strlen(basename) == 3 &&
565 basename[0] == 'a' &&
566 basename[1] >= 'a' && basename[1] <= 'k' &&
567 basename[2] >= '0' && basename[2] <= '9');
570 int cleanup_em_level(unsigned char *src, int length, char *filename)
572 int file_version = FILE_VERSION_EM_UNKNOWN;
575 if (length >= 2172 &&
576 src[2106] == 255 && /* version id: */
577 src[2107] == 54 && /* '6' */
578 src[2108] == 48 && /* '0' */
579 src[2109] == 48) /* '0' */
581 /* ---------- this cave has V6 file format ---------- */
582 file_version = FILE_VERSION_EM_V6;
584 /* remap elements to internal EMC level format */
585 for (i = 0; i < 2048; i++) /* cave */
586 src[i] = map_v6[src[i]];
587 for (i = 2048; i < 2084; i++) /* eaters */
588 src[i] = map_v6[src[i]];
589 for (i = 2112; i < 2148; i++) /* eaters */
590 src[i] = map_v6[src[i]];
592 else if (length >= 2110 &&
593 src[2106] == 255 && /* version id: */
594 src[2107] == 53 && /* '5' */
595 src[2108] == 48 && /* '0' */
596 src[2109] == 48) /* '0' */
598 /* ---------- this cave has V5 file format ---------- */
599 file_version = FILE_VERSION_EM_V5;
601 /* remap elements to internal EMC level format */
602 for (i = 0; i < 2048; i++) /* cave */
603 src[i] = map_v5[src[i]];
604 for (i = 2048; i < 2084; i++) /* eaters */
605 src[i] = map_v5[src[i]];
606 for (i = 2112; i < 2148; i++) /* eaters */
607 src[i] = src[i - 64];
609 else if (length >= 2106 &&
610 (src[1983] == 27 || /* encrypted (only EM I/II/III) */
611 src[1983] == 116 || /* unencrypted (usual case) */
612 src[1983] == 131)) /* unencrypted (rare case) */
614 /* ---------- this cave has V1, V2 or V3 file format ---------- */
616 boolean fix_copyright = FALSE;
619 byte at position 1983 (0x07bf) is used as "magic byte":
620 - 27 (0x1b) => encrypted level (V3 only / Kingsoft original games)
621 - 116 (0x74) => unencrypted level (byte is corrected to 131 (0x83))
622 - 131 (0x83) => unencrypted level (happens only in very rare cases)
625 if (src[1983] == 27) /* (0x1b) -- after decryption: 116 (0x74) */
627 /* this is original (encrypted) Emerald Mine I, II or III level file */
629 int first_byte = src[0];
630 unsigned char code0 = 0x65;
631 unsigned char code1 = 0x11;
633 /* decode encrypted level data */
634 for (i = 0; i < 2106; i++)
639 code0 = (code0 + 7) & 0xff;
642 src[1] = 131; /* needed for all Emerald Mine levels */
644 /* first byte is either 0xf1 (EM I and III) or 0xf5 (EM II) */
645 if (first_byte == 0xf5)
647 src[0] = 131; /* only needed for Emerald Mine II levels */
649 fix_copyright = TRUE;
652 /* ---------- this cave has V3 file format ---------- */
653 file_version = FILE_VERSION_EM_V3;
655 else if (filename_has_v1_format(filename))
657 /* ---------- this cave has V1 file format ---------- */
658 file_version = FILE_VERSION_EM_V1;
662 /* ---------- this cave has V2 file format ---------- */
663 file_version = FILE_VERSION_EM_V2;
666 /* remap elements to internal EMC level format */
667 for (i = 0; i < 2048; i++) /* cave */
668 src[i] = map_v4[src[i]];
669 for (i = 2048; i < 2084; i++) /* eaters */
670 src[i] = map_v4_eater[src[i] % 32];
671 for (i = 2112; i < 2148; i++) /* eaters */
672 src[i] = src[i - 64];
674 if (fix_copyright) /* fix "(c)" sign in Emerald Mine II levels */
676 for (i = 0; i < 2048; i++)
678 src[i] = 254; /* replace 'Cdecor_1' with 'Calpha_copyr' */
683 /* ---------- this cave has unknown file format ---------- */
685 /* if file has length of old-style level file, print (wrong) magic byte */
687 Error(ERR_WARN, "unknown magic byte 0x%02x at position 0x%04x",
690 return FILE_VERSION_EM_UNKNOWN;
693 if (file_version < FILE_VERSION_EM_V6)
696 src[2106] = 255; /* version id: */
697 src[2107] = 54; /* '6' */
698 src[2108] = 48; /* '0' */
699 src[2109] = 48; /* '0' */
703 /* stored level time of levels for the V2 player was changed to 50% of the
704 time for the V1 player (original V3 levels already considered this) */
705 if (file_version != FILE_VERSION_EM_V1 &&
706 file_version != FILE_VERSION_EM_V3)
711 for (i = 2148; i < 2172; i++)
718 /* ---------- at this stage, the cave data always has V6 format ---------- */
721 for (i = 0; i < 2048; i++)
724 for (i++; i < 2048; i++)
729 for (i = 64; i < 2048; i++)
730 if (src[i] == 63) /* replace element above 'Cacid_s' ... */
731 src[i - 64] = 101; /* ... with 'Cacid_1' */
733 /* fix acid with no base beneath it (see comment above for details) */
734 for (i = 64; i < 2048 - 1; i++)
736 if (file_version <= FILE_VERSION_EM_V2 &&
737 src[i - 64] == 101 && src[i] != 63) /* acid without base */
739 if (src[i - 1] == 101 || /* remove acid over acid row */
741 src[i - 64] = 6; /* replace element above with 'Cblank' */
743 src[i - 64] = 255; /* replace element above with 'Cfake_acid_1' */
747 /* fix acid in eaters */
748 for (i = 0; i < 8; i++)
749 for (j = 0; j < 6; j++)
750 if (src[eater_offset[i] + j + 3] == 63)
751 src[eater_offset[i] + j] = 101;
756 /* set cave tile at player position to blank */
757 for (i = 0; i < 2; i++)
758 src[GET_BE16(src[2096 + i * 2]) % 2048] = 128;
768 src[2159] = map_v6[src[2159]];
778 /* size of v6 cave */
782 Error(ERR_DEBUG, "EM level file version: %d", file_version);
791 structure of emerald mine level disk files
792 ----------------------------------------------------------------------
794 if(len >= 2172 && (buf[2106] == 255 && buf[2107] == 54 && buf[2108] == 48 && buf[2109] == 48)) // v6
795 if(len >= 2110 && (buf[2106] == 255 && buf[2107] == 53 && buf[2108] == 48 && buf[2109] == 48)) // v5
796 if(len >= 2106 && (buf[1983] == 116 || buf[2047] == 116)) // v4
797 if(len >= 2106 && (buf[1983] == 27 || buf[2047] == 219)) // v3
799 buf[0]=241;buf[1]=248;for(i=0,j=101;i<2106;i++,j+=7)buf[i]=(buf[i]^j)-17; // decrypt
801 number of movements (calls to logic) = time * 50 / 8
803 {} reserved (but some broken levels use them)
805 ----------------------------------------------------------------------
825 2095: emeralds needed
829 2102: wonderwall time
831 2106: ID (0xff363030)
837 2148: flags bit#7=NOI #6=RIS
838 2149: wind direction bit#0=right #1=down #2=left #3=up
839 2150: cave number bit#7=teamwork
848 2162: ball info bit#15=switch state #8=random
849 ; bit#0=N #1=S #2=W #3=E #4=SE #5=SW #6=NE #7=NW
850 2164: android move speed
851 2166: android clone speed
853 ; bit#0=emerald #1=diamond #2=stone #3=bomb #4=nut #5=tank #6=eater
854 ; #7=bug #8=alien #9=spring #10=balloon #11=ameuba #12=dynamite
859 1: stone {stone_fall}
861 3: diamond {diamond_fall}
863 5: alien {alien_pause}
877 19: emerald {emerald_fall}
888 30: blank {drip_stretchB}
889 31: drip {drip_stretch}
890 32: stone {stone_pause}
891 33: bomb {bomb_pause}
892 34: diamond {diamond_pause}
893 35: emerald {emerald_pause}
894 36: wonderwall {wonderwallB}
904 46: blank {sand_stonein_2}
905 47: blank {sand_stonein_3}
906 48: blank {sand_stonein_4}
907 49: sand {sand_stonesand_2}
908 50: sand {sand_stonesand_3}
909 51: sand {sand_stonesand_4}
910 52: sand_stone {sand_sandstone_2}
911 53: sand_stone {sand_sandstone_3}
912 54: sand_stone {sand_sandstone_4}
913 55: sand {sand_stonesand_4}
914 56: stone {sand_stoneout_2}
928 70: spring {spring_fall}
929 71: spring {spring_w}
930 72: spring {spring_e}
935 77: android {android_n_1}
936 78: android {android_n_2}
937 79: android {android_s_1}
938 80: android {android_s_2}
939 81: android {android_e_1}
940 82: android {android_e_2}
941 83: android {android_w_1}
942 84: android {android_w_2}
957 99: spring {push_spring_w}
958 100: spring {push_spring_e}
967 109: pause {grass_wB}
968 110: pause {grass_eB}
969 111: pause {grass_nB}
970 112: pause {grass_sB}
971 113: pause {dynamite_blank}
972 114: nut {push_nut_w}
973 115: nut {push_nut_e}
974 116: steel_2 {end of level}
976 118: pause {emerald_blank}
977 119: bomb {push_bomb_w}
978 120: bomb {push_bomb_e}
979 121: stone {push_stone_w}
980 122: stone {push_stone_e}
981 123: pause {diamond_blank}
1022 163: fake_blank {fake_blankB}
1023 164: fake_grass {fake_grassB}
1025 166: switch {switchB}
1116 ----------------------------------------------------------------------
1132 2091: dynamite value
1136 2095: emeralds needed
1140 2102: wonderwall time
1142 2106: ID (0xff353030)
1146 1: stone {stone_fall}
1148 3: diamond {diamond_fall}
1150 5: alien {alien_pause}
1162 17: bomb {bomb_fall}
1164 19: emerald {emerald_fall}
1174 29: drip {drip_fall}
1175 30: blank {drip_stretchB}
1176 31: drip {drip_stretch}
1177 32: stone {stone_pause}
1178 33: bomb {bomb_pause}
1179 34: diamond {diamond_pause}
1180 35: emerald {emerald_pause}
1181 36: wonderwall {wonderwallB}
1191 46: blank {sand_stonein_2}
1192 47: blank {sand_stonein_3}
1193 48: blank {sand_stonein_4}
1194 49: sand {sand_stonesand_2}
1195 50: sand {sand_stonesand_3}
1196 51: sand {sand_stonesand_4}
1197 52: sand_stone {sand_sandstone_2}
1198 53: sand_stone {sand_sandstone_3}
1199 54: sand_stone {sand_sandstone_4}
1200 55: sand {sand_stonesand_4}
1201 56: stone {sand_stoneout_2}
1254 109: pause {grass_wB}
1255 110: pause {grass_eB}
1256 111: pause {grass_nB}
1257 112: pause {grass_sB}
1258 113: pause {dynamite_blank}
1259 114: nut {push_nut_w}
1260 115: nut {push_nut_e}
1261 116: steel_2 {end of level}
1262 117: dynamite_4 {boom_2}
1263 118: pause {emerald_blank}
1264 119: bomb {push_bomb_w}
1265 120: bomb {push_bomb_e}
1266 121: stone {push_stone_w}
1267 122: stone {push_stone_e}
1268 123: pause {diamond_blank}
1269 124: pause {dirt_wB}
1270 125: pause {dirt_eB}
1271 126: pause {dirt_nB}
1272 127: pause {dirt_sB}
1403 ----------------------------------------------------------------------
1419 2091: dynamite value
1423 2095: emeralds needed
1427 2102: wonderwall time
1457 26: diamond {diamond_shine}
1458 27: emerald {emerald_shine}
1461 1: stone {stone_fall}
1463 3: diamond {diamond_fall}
1465 5: alien {alien_pause}
1477 17: bomb {bomb_fall}
1479 19: emerald {emerald_fall}
1489 29: drip {drip_fall}
1490 30: blank {drip_stretchB}
1491 31: drip {drip_stretch}
1492 32: stone {stone_pause}
1493 33: bomb {bomb_pause}
1494 34: diamond {diamond_pause}
1495 35: emerald {emerald_pause}
1496 36: wonderwall {wonderwallB}
1506 46: blank {sand_stonein_2}
1507 47: blank {sand_stonein_3}
1508 48: blank {sand_stonein_4}
1509 49: sand {sand_stonesand_2}
1510 50: sand {sand_stonesand_3}
1511 51: sand {sand_stonesand_4}
1512 52: sand_stone {sand_sandstone_2}
1513 53: sand_stone {sand_sandstone_3}
1514 54: sand_stone {sand_sandstone_4}
1515 55: sand {sand_stonesand_4}
1516 56: stone {sand_stoneout_2}
1573 113: pause {dynamite_blank}
1574 114: nut {push_nut_w}
1575 115: nut {push_nut_e}
1576 116: steel_1 {end of level}
1577 117: dynamite_4 {boom_2}
1578 118: pause {emerald_blank}
1579 119: bomb {push_bomb_w}
1580 120: bomb {push_bomb_e}
1581 121: stone {push_stone_w}
1582 122: stone {push_stone_e}
1583 123: pause {diamond_blank}
1584 124: pause {dirt_wB}
1585 125: pause {dirt_eB}
1586 126: pause {dirt_nB}
1587 127: pause {dirt_sB}
1620 159: fake_grass {dirt}
1621 160: fake_grass {dirt}
1622 161: fake_grass {dirt}
1623 162: fake_grass {dirt}
1624 163: fake_grass {dirt}
1625 164: fake_grass {dirt}
1626 165: fake_grass {dirt}
1627 166: fake_grass {dirt}
1628 167: fake_grass {dirt}
1629 168: fake_grass {dirt}
1630 169: fake_grass {dirt}
1631 170: fake_grass {dirt}
1632 171: fake_grass {dirt}
1633 172: fake_grass {dirt}
1634 173: fake_grass {dirt}
1635 174: fake_grass {dirt}
1701 240: alpha_arrow_e {}
1702 241: decor_1 {alpha_copyr}
1718 ----------------------------------------------------------------------