moved functions to parse GIC parameters from 'libgame' to main source tree
[rocksndiamonds.git] / src / files.c
1 // ============================================================================
2 // Rocks'n'Diamonds - McDuffin Strikes Back!
3 // ----------------------------------------------------------------------------
4 // (c) 1995-2014 by Artsoft Entertainment
5 //                  Holger Schemel
6 //                  info@artsoft.org
7 //                  http://www.artsoft.org/
8 // ----------------------------------------------------------------------------
9 // files.c
10 // ============================================================================
11
12 #include <ctype.h>
13 #include <sys/stat.h>
14 #include <dirent.h>
15 #include <math.h>
16
17 #include "libgame/libgame.h"
18
19 #include "files.h"
20 #include "init.h"
21 #include "screens.h"
22 #include "tools.h"
23 #include "tape.h"
24 #include "config.h"
25
26 #define ENABLE_UNUSED_CODE      0       // currently unused functions
27 #define ENABLE_HISTORIC_CHUNKS  0       // only for historic reference
28 #define ENABLE_RESERVED_CODE    0       // reserved for later use
29
30 #define CHUNK_ID_LEN            4       // IFF style chunk id length
31 #define CHUNK_SIZE_UNDEFINED    0       // undefined chunk size == 0
32 #define CHUNK_SIZE_NONE         -1      // do not write chunk size
33
34 #define LEVEL_CHUNK_NAME_SIZE   MAX_LEVEL_NAME_LEN
35 #define LEVEL_CHUNK_AUTH_SIZE   MAX_LEVEL_AUTHOR_LEN
36
37 #define LEVEL_CHUNK_VERS_SIZE   8       // size of file version chunk
38 #define LEVEL_CHUNK_DATE_SIZE   4       // size of file date chunk
39 #define LEVEL_CHUNK_HEAD_SIZE   80      // size of level file header
40 #define LEVEL_CHUNK_HEAD_UNUSED 0       // unused level header bytes
41 #define LEVEL_CHUNK_CNT2_SIZE   160     // size of level CNT2 chunk
42 #define LEVEL_CHUNK_CNT2_UNUSED 11      // unused CNT2 chunk bytes
43 #define LEVEL_CHUNK_CNT3_HEADER 16      // size of level CNT3 header
44 #define LEVEL_CHUNK_CNT3_UNUSED 10      // unused CNT3 chunk bytes
45 #define LEVEL_CPART_CUS3_SIZE   134     // size of CUS3 chunk part
46 #define LEVEL_CPART_CUS3_UNUSED 15      // unused CUS3 bytes / part
47 #define LEVEL_CHUNK_GRP1_SIZE   74      // size of level GRP1 chunk
48
49 // (element number, number of change pages, change page number)
50 #define LEVEL_CHUNK_CUSX_UNCHANGED      (2 + (1 + 1) + (1 + 1))
51
52 // (element number only)
53 #define LEVEL_CHUNK_GRPX_UNCHANGED      2
54 #define LEVEL_CHUNK_NOTE_UNCHANGED      2
55
56 // (nothing at all if unchanged)
57 #define LEVEL_CHUNK_ELEM_UNCHANGED      0
58
59 #define TAPE_CHUNK_VERS_SIZE    8       // size of file version chunk
60 #define TAPE_CHUNK_HEAD_SIZE    20      // size of tape file header
61 #define TAPE_CHUNK_HEAD_UNUSED  2       // unused tape header bytes
62
63 #define LEVEL_CHUNK_CNT3_SIZE(x)         (LEVEL_CHUNK_CNT3_HEADER + (x))
64 #define LEVEL_CHUNK_CUS3_SIZE(x)         (2 + (x) * LEVEL_CPART_CUS3_SIZE)
65 #define LEVEL_CHUNK_CUS4_SIZE(x)         (96 + (x) * 48)
66
67 // file identifier strings
68 #define LEVEL_COOKIE_TMPL               "ROCKSNDIAMONDS_LEVEL_FILE_VERSION_x.x"
69 #define TAPE_COOKIE_TMPL                "ROCKSNDIAMONDS_TAPE_FILE_VERSION_x.x"
70 #define SCORE_COOKIE                    "ROCKSNDIAMONDS_SCORE_FILE_VERSION_1.2"
71
72 // values for deciding when (not) to save configuration data
73 #define SAVE_CONF_NEVER                 0
74 #define SAVE_CONF_ALWAYS                1
75 #define SAVE_CONF_WHEN_CHANGED          -1
76
77 // values for chunks using micro chunks
78 #define CONF_MASK_1_BYTE                0x00
79 #define CONF_MASK_2_BYTE                0x40
80 #define CONF_MASK_4_BYTE                0x80
81 #define CONF_MASK_MULTI_BYTES           0xc0
82
83 #define CONF_MASK_BYTES                 0xc0
84 #define CONF_MASK_TOKEN                 0x3f
85
86 #define CONF_VALUE_1_BYTE(x)            (CONF_MASK_1_BYTE       | (x))
87 #define CONF_VALUE_2_BYTE(x)            (CONF_MASK_2_BYTE       | (x))
88 #define CONF_VALUE_4_BYTE(x)            (CONF_MASK_4_BYTE       | (x))
89 #define CONF_VALUE_MULTI_BYTES(x)       (CONF_MASK_MULTI_BYTES  | (x))
90
91 // these definitions are just for convenience of use and readability
92 #define CONF_VALUE_8_BIT(x)             CONF_VALUE_1_BYTE(x)
93 #define CONF_VALUE_16_BIT(x)            CONF_VALUE_2_BYTE(x)
94 #define CONF_VALUE_32_BIT(x)            CONF_VALUE_4_BYTE(x)
95 #define CONF_VALUE_BYTES(x)             CONF_VALUE_MULTI_BYTES(x)
96
97 #define CONF_VALUE_NUM_BYTES(x)         ((x) == CONF_MASK_1_BYTE ? 1 :  \
98                                          (x) == CONF_MASK_2_BYTE ? 2 :  \
99                                          (x) == CONF_MASK_4_BYTE ? 4 : 0)
100
101 #define CONF_CONTENT_NUM_ELEMENTS       (3 * 3)
102 #define CONF_CONTENT_NUM_BYTES          (CONF_CONTENT_NUM_ELEMENTS * 2)
103 #define CONF_ELEMENT_NUM_BYTES          (2)
104
105 #define CONF_ENTITY_NUM_BYTES(t)        ((t) == TYPE_ELEMENT ||         \
106                                          (t) == TYPE_ELEMENT_LIST ?     \
107                                          CONF_ELEMENT_NUM_BYTES :       \
108                                          (t) == TYPE_CONTENT ||         \
109                                          (t) == TYPE_CONTENT_LIST ?     \
110                                          CONF_CONTENT_NUM_BYTES : 1)
111
112 #define CONF_ELEMENT_BYTE_POS(i)        ((i) * CONF_ELEMENT_NUM_BYTES)
113 #define CONF_ELEMENTS_ELEMENT(b,i)     ((b[CONF_ELEMENT_BYTE_POS(i)] << 8) |  \
114                                         (b[CONF_ELEMENT_BYTE_POS(i) + 1]))
115
116 #define CONF_CONTENT_ELEMENT_POS(c,x,y) ((c) * CONF_CONTENT_NUM_ELEMENTS +    \
117                                          (y) * 3 + (x))
118 #define CONF_CONTENT_BYTE_POS(c,x,y)    (CONF_CONTENT_ELEMENT_POS(c,x,y) *    \
119                                          CONF_ELEMENT_NUM_BYTES)
120 #define CONF_CONTENTS_ELEMENT(b,c,x,y) ((b[CONF_CONTENT_BYTE_POS(c,x,y)]<< 8)|\
121                                         (b[CONF_CONTENT_BYTE_POS(c,x,y) + 1]))
122
123 // temporary variables used to store pointers to structure members
124 static struct LevelInfo li;
125 static struct ElementInfo xx_ei, yy_ei;
126 static struct ElementChangeInfo xx_change;
127 static struct ElementGroupInfo xx_group;
128 static struct EnvelopeInfo xx_envelope;
129 static unsigned int xx_event_bits[NUM_CE_BITFIELDS];
130 static char xx_default_description[MAX_ELEMENT_NAME_LEN + 1];
131 static int xx_num_contents;
132 static int xx_current_change_page;
133 static char xx_default_string_empty[1] = "";
134 static int xx_string_length_unused;
135
136 struct LevelFileConfigInfo
137 {
138   int element;                  // element for which data is to be stored
139   int save_type;                // save data always, never or when changed
140   int data_type;                // data type (used internally, not stored)
141   int conf_type;                // micro chunk identifier (stored in file)
142
143   // (mandatory)
144   void *value;                  // variable that holds the data to be stored
145   int default_value;            // initial default value for this variable
146
147   // (optional)
148   void *value_copy;             // variable that holds the data to be copied
149   void *num_entities;           // number of entities for multi-byte data
150   int default_num_entities;     // default number of entities for this data
151   int max_num_entities;         // maximal number of entities for this data
152   char *default_string;         // optional default string for string data
153 };
154
155 static struct LevelFileConfigInfo chunk_config_INFO[] =
156 {
157   // ---------- values not related to single elements -------------------------
158
159   {
160     -1,                                 SAVE_CONF_ALWAYS,
161     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
162     &li.game_engine_type,               GAME_ENGINE_TYPE_RND
163   },
164
165   {
166     -1,                                 SAVE_CONF_ALWAYS,
167     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
168     &li.fieldx,                         STD_LEV_FIELDX
169   },
170   {
171     -1,                                 SAVE_CONF_ALWAYS,
172     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
173     &li.fieldy,                         STD_LEV_FIELDY
174   },
175
176   {
177     -1,                                 SAVE_CONF_ALWAYS,
178     TYPE_INTEGER,                       CONF_VALUE_16_BIT(3),
179     &li.time,                           100
180   },
181
182   {
183     -1,                                 SAVE_CONF_ALWAYS,
184     TYPE_INTEGER,                       CONF_VALUE_16_BIT(4),
185     &li.gems_needed,                    0
186   },
187
188   {
189     -1,                                 -1,
190     TYPE_INTEGER,                       CONF_VALUE_32_BIT(2),
191     &li.random_seed,                    0
192   },
193
194   {
195     -1,                                 -1,
196     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
197     &li.use_step_counter,               FALSE
198   },
199
200   {
201     -1,                                 -1,
202     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(4),
203     &li.wind_direction_initial,         MV_NONE
204   },
205
206   {
207     -1,                                 -1,
208     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(5),
209     &li.em_slippery_gems,               FALSE
210   },
211
212   {
213     -1,                                 -1,
214     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(6),
215     &li.use_custom_template,            FALSE
216   },
217
218   {
219     -1,                                 -1,
220     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(1),
221     &li.can_move_into_acid_bits,        ~0      // default: everything can
222   },
223
224   {
225     -1,                                 -1,
226     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(7),
227     &li.dont_collide_with_bits,         ~0      // default: always deadly
228   },
229
230   {
231     -1,                                 -1,
232     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(8),
233     &li.em_explodes_by_fire,            FALSE
234   },
235
236   {
237     -1,                                 -1,
238     TYPE_INTEGER,                       CONF_VALUE_16_BIT(5),
239     &li.score[SC_TIME_BONUS],           1
240   },
241
242   {
243     -1,                                 -1,
244     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
245     &li.auto_exit_sokoban,              FALSE
246   },
247
248   {
249     -1,                                 -1,
250     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(10),
251     &li.auto_count_gems,                FALSE
252   },
253
254   {
255     -1,                                 -1,
256     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(11),
257     &li.solved_by_one_player,           FALSE
258   },
259
260   {
261     -1,                                 -1,
262     -1,                                 -1,
263     NULL,                               -1
264   }
265 };
266
267 static struct LevelFileConfigInfo chunk_config_ELEM[] =
268 {
269   // (these values are the same for each player)
270   {
271     EL_PLAYER_1,                        -1,
272     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
273     &li.block_last_field,               FALSE   // default case for EM levels
274   },
275   {
276     EL_PLAYER_1,                        -1,
277     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
278     &li.sp_block_last_field,            TRUE    // default case for SP levels
279   },
280   {
281     EL_PLAYER_1,                        -1,
282     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
283     &li.instant_relocation,             FALSE
284   },
285   {
286     EL_PLAYER_1,                        -1,
287     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(4),
288     &li.can_pass_to_walkable,           FALSE
289   },
290   {
291     EL_PLAYER_1,                        -1,
292     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(5),
293     &li.block_snap_field,               TRUE
294   },
295   {
296     EL_PLAYER_1,                        -1,
297     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(6),
298     &li.continuous_snapping,            TRUE
299   },
300   {
301     EL_PLAYER_1,                        -1,
302     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(12),
303     &li.shifted_relocation,             FALSE
304   },
305   {
306     EL_PLAYER_1,                        -1,
307     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(15),
308     &li.lazy_relocation,                FALSE
309   },
310
311   // (these values are different for each player)
312   {
313     EL_PLAYER_1,                        -1,
314     TYPE_INTEGER,                       CONF_VALUE_8_BIT(7),
315     &li.initial_player_stepsize[0],     STEPSIZE_NORMAL
316   },
317   {
318     EL_PLAYER_1,                        -1,
319     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(8),
320     &li.initial_player_gravity[0],      FALSE
321   },
322   {
323     EL_PLAYER_1,                        -1,
324     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
325     &li.use_start_element[0],           FALSE
326   },
327   {
328     EL_PLAYER_1,                        -1,
329     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
330     &li.start_element[0],               EL_PLAYER_1
331   },
332   {
333     EL_PLAYER_1,                        -1,
334     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(10),
335     &li.use_artwork_element[0],         FALSE
336   },
337   {
338     EL_PLAYER_1,                        -1,
339     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(2),
340     &li.artwork_element[0],             EL_PLAYER_1
341   },
342   {
343     EL_PLAYER_1,                        -1,
344     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(11),
345     &li.use_explosion_element[0],       FALSE
346   },
347   {
348     EL_PLAYER_1,                        -1,
349     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(3),
350     &li.explosion_element[0],           EL_PLAYER_1
351   },
352   {
353     EL_PLAYER_1,                        -1,
354     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(13),
355     &li.use_initial_inventory[0],       FALSE
356   },
357   {
358     EL_PLAYER_1,                        -1,
359     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(14),
360     &li.initial_inventory_size[0],      1
361   },
362   {
363     EL_PLAYER_1,                        -1,
364     TYPE_ELEMENT_LIST,                  CONF_VALUE_BYTES(1),
365     &li.initial_inventory_content[0][0],EL_EMPTY, NULL,
366     &li.initial_inventory_size[0],      1, MAX_INITIAL_INVENTORY_SIZE
367   },
368
369   {
370     EL_PLAYER_2,                        -1,
371     TYPE_INTEGER,                       CONF_VALUE_8_BIT(7),
372     &li.initial_player_stepsize[1],     STEPSIZE_NORMAL
373   },
374   {
375     EL_PLAYER_2,                        -1,
376     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(8),
377     &li.initial_player_gravity[1],      FALSE
378   },
379   {
380     EL_PLAYER_2,                        -1,
381     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
382     &li.use_start_element[1],           FALSE
383   },
384   {
385     EL_PLAYER_2,                        -1,
386     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
387     &li.start_element[1],               EL_PLAYER_2
388   },
389   {
390     EL_PLAYER_2,                        -1,
391     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(10),
392     &li.use_artwork_element[1],         FALSE
393   },
394   {
395     EL_PLAYER_2,                        -1,
396     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(2),
397     &li.artwork_element[1],             EL_PLAYER_2
398   },
399   {
400     EL_PLAYER_2,                        -1,
401     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(11),
402     &li.use_explosion_element[1],       FALSE
403   },
404   {
405     EL_PLAYER_2,                        -1,
406     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(3),
407     &li.explosion_element[1],           EL_PLAYER_2
408   },
409   {
410     EL_PLAYER_2,                        -1,
411     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(13),
412     &li.use_initial_inventory[1],       FALSE
413   },
414   {
415     EL_PLAYER_2,                        -1,
416     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(14),
417     &li.initial_inventory_size[1],      1
418   },
419   {
420     EL_PLAYER_2,                        -1,
421     TYPE_ELEMENT_LIST,                  CONF_VALUE_BYTES(1),
422     &li.initial_inventory_content[1][0],EL_EMPTY, NULL,
423     &li.initial_inventory_size[1],      1, MAX_INITIAL_INVENTORY_SIZE
424   },
425
426   {
427     EL_PLAYER_3,                        -1,
428     TYPE_INTEGER,                       CONF_VALUE_8_BIT(7),
429     &li.initial_player_stepsize[2],     STEPSIZE_NORMAL
430   },
431   {
432     EL_PLAYER_3,                        -1,
433     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(8),
434     &li.initial_player_gravity[2],      FALSE
435   },
436   {
437     EL_PLAYER_3,                        -1,
438     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
439     &li.use_start_element[2],           FALSE
440   },
441   {
442     EL_PLAYER_3,                        -1,
443     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
444     &li.start_element[2],               EL_PLAYER_3
445   },
446   {
447     EL_PLAYER_3,                        -1,
448     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(10),
449     &li.use_artwork_element[2],         FALSE
450   },
451   {
452     EL_PLAYER_3,                        -1,
453     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(2),
454     &li.artwork_element[2],             EL_PLAYER_3
455   },
456   {
457     EL_PLAYER_3,                        -1,
458     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(11),
459     &li.use_explosion_element[2],       FALSE
460   },
461   {
462     EL_PLAYER_3,                        -1,
463     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(3),
464     &li.explosion_element[2],           EL_PLAYER_3
465   },
466   {
467     EL_PLAYER_3,                        -1,
468     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(13),
469     &li.use_initial_inventory[2],       FALSE
470   },
471   {
472     EL_PLAYER_3,                        -1,
473     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(14),
474     &li.initial_inventory_size[2],      1
475   },
476   {
477     EL_PLAYER_3,                        -1,
478     TYPE_ELEMENT_LIST,                  CONF_VALUE_BYTES(1),
479     &li.initial_inventory_content[2][0],EL_EMPTY, NULL,
480     &li.initial_inventory_size[2],      1, MAX_INITIAL_INVENTORY_SIZE
481   },
482
483   {
484     EL_PLAYER_4,                        -1,
485     TYPE_INTEGER,                       CONF_VALUE_8_BIT(7),
486     &li.initial_player_stepsize[3],     STEPSIZE_NORMAL
487   },
488   {
489     EL_PLAYER_4,                        -1,
490     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(8),
491     &li.initial_player_gravity[3],      FALSE
492   },
493   {
494     EL_PLAYER_4,                        -1,
495     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
496     &li.use_start_element[3],           FALSE
497   },
498   {
499     EL_PLAYER_4,                        -1,
500     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
501     &li.start_element[3],               EL_PLAYER_4
502   },
503   {
504     EL_PLAYER_4,                        -1,
505     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(10),
506     &li.use_artwork_element[3],         FALSE
507   },
508   {
509     EL_PLAYER_4,                        -1,
510     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(2),
511     &li.artwork_element[3],             EL_PLAYER_4
512   },
513   {
514     EL_PLAYER_4,                        -1,
515     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(11),
516     &li.use_explosion_element[3],       FALSE
517   },
518   {
519     EL_PLAYER_4,                        -1,
520     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(3),
521     &li.explosion_element[3],           EL_PLAYER_4
522   },
523   {
524     EL_PLAYER_4,                        -1,
525     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(13),
526     &li.use_initial_inventory[3],       FALSE
527   },
528   {
529     EL_PLAYER_4,                        -1,
530     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(14),
531     &li.initial_inventory_size[3],      1
532   },
533   {
534     EL_PLAYER_4,                        -1,
535     TYPE_ELEMENT_LIST,                  CONF_VALUE_BYTES(1),
536     &li.initial_inventory_content[3][0],EL_EMPTY, NULL,
537     &li.initial_inventory_size[3],      1, MAX_INITIAL_INVENTORY_SIZE
538   },
539
540   {
541     EL_EMERALD,                         -1,
542     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
543     &li.score[SC_EMERALD],              10
544   },
545
546   {
547     EL_DIAMOND,                         -1,
548     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
549     &li.score[SC_DIAMOND],              10
550   },
551
552   {
553     EL_BUG,                             -1,
554     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
555     &li.score[SC_BUG],                  10
556   },
557
558   {
559     EL_SPACESHIP,                       -1,
560     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
561     &li.score[SC_SPACESHIP],            10
562   },
563
564   {
565     EL_PACMAN,                          -1,
566     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
567     &li.score[SC_PACMAN],               10
568   },
569
570   {
571     EL_NUT,                             -1,
572     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
573     &li.score[SC_NUT],                  10
574   },
575
576   {
577     EL_DYNAMITE,                        -1,
578     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
579     &li.score[SC_DYNAMITE],             10
580   },
581
582   {
583     EL_KEY_1,                           -1,
584     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
585     &li.score[SC_KEY],                  10
586   },
587
588   {
589     EL_PEARL,                           -1,
590     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
591     &li.score[SC_PEARL],                10
592   },
593
594   {
595     EL_CRYSTAL,                         -1,
596     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
597     &li.score[SC_CRYSTAL],              10
598   },
599
600   {
601     EL_BD_AMOEBA,                       -1,
602     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
603     &li.amoeba_content,                 EL_DIAMOND
604   },
605   {
606     EL_BD_AMOEBA,                       -1,
607     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
608     &li.amoeba_speed,                   10
609   },
610   {
611     EL_BD_AMOEBA,                       -1,
612     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
613     &li.grow_into_diggable,             TRUE
614   },
615
616   {
617     EL_YAMYAM,                          -1,
618     TYPE_CONTENT_LIST,                  CONF_VALUE_BYTES(1),
619     &li.yamyam_content,                 EL_ROCK, NULL,
620     &li.num_yamyam_contents,            4, MAX_ELEMENT_CONTENTS
621   },
622   {
623     EL_YAMYAM,                          -1,
624     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
625     &li.score[SC_YAMYAM],               10
626   },
627
628   {
629     EL_ROBOT,                           -1,
630     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
631     &li.score[SC_ROBOT],                10
632   },
633   {
634     EL_ROBOT,                           -1,
635     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
636     &li.slurp_score,                    10
637   },
638
639   {
640     EL_ROBOT_WHEEL,                     -1,
641     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
642     &li.time_wheel,                     10
643   },
644
645   {
646     EL_MAGIC_WALL,                      -1,
647     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
648     &li.time_magic_wall,                10
649   },
650
651   {
652     EL_GAME_OF_LIFE,                    -1,
653     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
654     &li.game_of_life[0],                2
655   },
656   {
657     EL_GAME_OF_LIFE,                    -1,
658     TYPE_INTEGER,                       CONF_VALUE_8_BIT(2),
659     &li.game_of_life[1],                3
660   },
661   {
662     EL_GAME_OF_LIFE,                    -1,
663     TYPE_INTEGER,                       CONF_VALUE_8_BIT(3),
664     &li.game_of_life[2],                3
665   },
666   {
667     EL_GAME_OF_LIFE,                    -1,
668     TYPE_INTEGER,                       CONF_VALUE_8_BIT(4),
669     &li.game_of_life[3],                3
670   },
671   {
672     EL_GAME_OF_LIFE,                    -1,
673     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(5),
674     &li.use_life_bugs,                  FALSE
675   },
676
677   {
678     EL_BIOMAZE,                         -1,
679     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
680     &li.biomaze[0],                     2
681   },
682   {
683     EL_BIOMAZE,                         -1,
684     TYPE_INTEGER,                       CONF_VALUE_8_BIT(2),
685     &li.biomaze[1],                     3
686   },
687   {
688     EL_BIOMAZE,                         -1,
689     TYPE_INTEGER,                       CONF_VALUE_8_BIT(3),
690     &li.biomaze[2],                     3
691   },
692   {
693     EL_BIOMAZE,                         -1,
694     TYPE_INTEGER,                       CONF_VALUE_8_BIT(4),
695     &li.biomaze[3],                     3
696   },
697
698   {
699     EL_TIMEGATE_SWITCH,                 -1,
700     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
701     &li.time_timegate,                  10
702   },
703
704   {
705     EL_LIGHT_SWITCH_ACTIVE,             -1,
706     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
707     &li.time_light,                     10
708   },
709
710   {
711     EL_SHIELD_NORMAL,                   -1,
712     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
713     &li.shield_normal_time,             10
714   },
715   {
716     EL_SHIELD_NORMAL,                   -1,
717     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
718     &li.score[SC_SHIELD],               10
719   },
720
721   {
722     EL_SHIELD_DEADLY,                   -1,
723     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
724     &li.shield_deadly_time,             10
725   },
726   {
727     EL_SHIELD_DEADLY,                   -1,
728     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
729     &li.score[SC_SHIELD],               10
730   },
731
732   {
733     EL_EXTRA_TIME,                      -1,
734     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
735     &li.extra_time,                     10
736   },
737   {
738     EL_EXTRA_TIME,                      -1,
739     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
740     &li.extra_time_score,               10
741   },
742
743   {
744     EL_TIME_ORB_FULL,                   -1,
745     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
746     &li.time_orb_time,                  10
747   },
748   {
749     EL_TIME_ORB_FULL,                   -1,
750     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
751     &li.use_time_orb_bug,               FALSE
752   },
753
754   {
755     EL_SPRING,                          -1,
756     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
757     &li.use_spring_bug,                 FALSE
758   },
759
760   {
761     EL_EMC_ANDROID,                     -1,
762     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
763     &li.android_move_time,              10
764   },
765   {
766     EL_EMC_ANDROID,                     -1,
767     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
768     &li.android_clone_time,             10
769   },
770   {
771     EL_EMC_ANDROID,                     -1,
772     TYPE_ELEMENT_LIST,                  CONF_VALUE_BYTES(1),
773     &li.android_clone_element[0],       EL_EMPTY, NULL,
774     &li.num_android_clone_elements,     1, MAX_ANDROID_ELEMENTS
775   },
776
777   {
778     EL_EMC_LENSES,                      -1,
779     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
780     &li.lenses_score,                   10
781   },
782   {
783     EL_EMC_LENSES,                      -1,
784     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
785     &li.lenses_time,                    10
786   },
787
788   {
789     EL_EMC_MAGNIFIER,                   -1,
790     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
791     &li.magnify_score,                  10
792   },
793   {
794     EL_EMC_MAGNIFIER,                   -1,
795     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
796     &li.magnify_time,                   10
797   },
798
799   {
800     EL_EMC_MAGIC_BALL,                  -1,
801     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
802     &li.ball_time,                      10
803   },
804   {
805     EL_EMC_MAGIC_BALL,                  -1,
806     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
807     &li.ball_random,                    FALSE
808   },
809   {
810     EL_EMC_MAGIC_BALL,                  -1,
811     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
812     &li.ball_state_initial,             FALSE
813   },
814   {
815     EL_EMC_MAGIC_BALL,                  -1,
816     TYPE_CONTENT_LIST,                  CONF_VALUE_BYTES(1),
817     &li.ball_content,                   EL_EMPTY, NULL,
818     &li.num_ball_contents,              4, MAX_ELEMENT_CONTENTS
819   },
820
821   {
822     EL_SOKOBAN_FIELD_EMPTY,             -1,
823     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
824     &li.sb_fields_needed,               TRUE
825   },
826
827   {
828     EL_SOKOBAN_OBJECT,                  -1,
829     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
830     &li.sb_objects_needed,              TRUE
831   },
832
833   {
834     EL_MM_MCDUFFIN,                     -1,
835     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
836     &li.mm_laser_red,                   FALSE
837   },
838   {
839     EL_MM_MCDUFFIN,                     -1,
840     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
841     &li.mm_laser_green,                 FALSE
842   },
843   {
844     EL_MM_MCDUFFIN,                     -1,
845     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
846     &li.mm_laser_blue,                  TRUE
847   },
848
849   {
850     EL_DF_LASER,                        -1,
851     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
852     &li.df_laser_red,                   TRUE
853   },
854   {
855     EL_DF_LASER,                        -1,
856     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
857     &li.df_laser_green,                 TRUE
858   },
859   {
860     EL_DF_LASER,                        -1,
861     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
862     &li.df_laser_blue,                  FALSE
863   },
864
865   {
866     EL_MM_FUSE_ACTIVE,                  -1,
867     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
868     &li.mm_time_fuse,                   25
869   },
870   {
871     EL_MM_BOMB,                         -1,
872     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
873     &li.mm_time_bomb,                   75
874   },
875   {
876     EL_MM_GRAY_BALL,                    -1,
877     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
878     &li.mm_time_ball,                   75
879   },
880   {
881     EL_MM_STEEL_BLOCK,                  -1,
882     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
883     &li.mm_time_block,                  75
884   },
885   {
886     EL_MM_LIGHTBALL,                    -1,
887     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
888     &li.score[SC_ELEM_BONUS],           10
889   },
890
891   // ---------- unused values -------------------------------------------------
892
893   {
894     EL_UNKNOWN,                         SAVE_CONF_NEVER,
895     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
896     &li.score[SC_UNKNOWN_15],           10
897   },
898
899   {
900     -1,                                 -1,
901     -1,                                 -1,
902     NULL,                               -1
903   }
904 };
905
906 static struct LevelFileConfigInfo chunk_config_NOTE[] =
907 {
908   {
909     -1,                                 -1,
910     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
911     &xx_envelope.xsize,                 MAX_ENVELOPE_XSIZE,
912   },
913   {
914     -1,                                 -1,
915     TYPE_INTEGER,                       CONF_VALUE_8_BIT(2),
916     &xx_envelope.ysize,                 MAX_ENVELOPE_YSIZE,
917   },
918
919   {
920     -1,                                 -1,
921     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
922     &xx_envelope.autowrap,              FALSE
923   },
924   {
925     -1,                                 -1,
926     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(4),
927     &xx_envelope.centered,              FALSE
928   },
929
930   {
931     -1,                                 -1,
932     TYPE_STRING,                        CONF_VALUE_BYTES(1),
933     &xx_envelope.text,                  -1, NULL,
934     &xx_string_length_unused,           -1, MAX_ENVELOPE_TEXT_LEN,
935     &xx_default_string_empty[0]
936   },
937
938   {
939     -1,                                 -1,
940     -1,                                 -1,
941     NULL,                               -1
942   }
943 };
944
945 static struct LevelFileConfigInfo chunk_config_CUSX_base[] =
946 {
947   {
948     -1,                                 -1,
949     TYPE_STRING,                        CONF_VALUE_BYTES(1),
950     &xx_ei.description[0],              -1,
951     &yy_ei.description[0],
952     &xx_string_length_unused,           -1, MAX_ELEMENT_NAME_LEN,
953     &xx_default_description[0]
954   },
955
956   {
957     -1,                                 -1,
958     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(1),
959     &xx_ei.properties[EP_BITFIELD_BASE_NR], EP_BITMASK_BASE_DEFAULT,
960     &yy_ei.properties[EP_BITFIELD_BASE_NR]
961   },
962 #if ENABLE_RESERVED_CODE
963   // (reserved for later use)
964   {
965     -1,                                 -1,
966     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(2),
967     &xx_ei.properties[EP_BITFIELD_BASE_NR + 1], EP_BITMASK_DEFAULT,
968     &yy_ei.properties[EP_BITFIELD_BASE_NR + 1]
969   },
970 #endif
971
972   {
973     -1,                                 -1,
974     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
975     &xx_ei.use_gfx_element,             FALSE,
976     &yy_ei.use_gfx_element
977   },
978   {
979     -1,                                 -1,
980     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
981     &xx_ei.gfx_element_initial,         EL_EMPTY_SPACE,
982     &yy_ei.gfx_element_initial
983   },
984
985   {
986     -1,                                 -1,
987     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(2),
988     &xx_ei.access_direction,            MV_ALL_DIRECTIONS,
989     &yy_ei.access_direction
990   },
991
992   {
993     -1,                                 -1,
994     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
995     &xx_ei.collect_score_initial,       10,
996     &yy_ei.collect_score_initial
997   },
998   {
999     -1,                                 -1,
1000     TYPE_INTEGER,                       CONF_VALUE_16_BIT(3),
1001     &xx_ei.collect_count_initial,       1,
1002     &yy_ei.collect_count_initial
1003   },
1004
1005   {
1006     -1,                                 -1,
1007     TYPE_INTEGER,                       CONF_VALUE_16_BIT(4),
1008     &xx_ei.ce_value_fixed_initial,      0,
1009     &yy_ei.ce_value_fixed_initial
1010   },
1011   {
1012     -1,                                 -1,
1013     TYPE_INTEGER,                       CONF_VALUE_16_BIT(5),
1014     &xx_ei.ce_value_random_initial,     0,
1015     &yy_ei.ce_value_random_initial
1016   },
1017   {
1018     -1,                                 -1,
1019     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
1020     &xx_ei.use_last_ce_value,           FALSE,
1021     &yy_ei.use_last_ce_value
1022   },
1023
1024   {
1025     -1,                                 -1,
1026     TYPE_INTEGER,                       CONF_VALUE_16_BIT(6),
1027     &xx_ei.push_delay_fixed,            8,
1028     &yy_ei.push_delay_fixed
1029   },
1030   {
1031     -1,                                 -1,
1032     TYPE_INTEGER,                       CONF_VALUE_16_BIT(7),
1033     &xx_ei.push_delay_random,           8,
1034     &yy_ei.push_delay_random
1035   },
1036   {
1037     -1,                                 -1,
1038     TYPE_INTEGER,                       CONF_VALUE_16_BIT(8),
1039     &xx_ei.drop_delay_fixed,            0,
1040     &yy_ei.drop_delay_fixed
1041   },
1042   {
1043     -1,                                 -1,
1044     TYPE_INTEGER,                       CONF_VALUE_16_BIT(9),
1045     &xx_ei.drop_delay_random,           0,
1046     &yy_ei.drop_delay_random
1047   },
1048   {
1049     -1,                                 -1,
1050     TYPE_INTEGER,                       CONF_VALUE_16_BIT(10),
1051     &xx_ei.move_delay_fixed,            0,
1052     &yy_ei.move_delay_fixed
1053   },
1054   {
1055     -1,                                 -1,
1056     TYPE_INTEGER,                       CONF_VALUE_16_BIT(11),
1057     &xx_ei.move_delay_random,           0,
1058     &yy_ei.move_delay_random
1059   },
1060
1061   {
1062     -1,                                 -1,
1063     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(3),
1064     &xx_ei.move_pattern,                MV_ALL_DIRECTIONS,
1065     &yy_ei.move_pattern
1066   },
1067   {
1068     -1,                                 -1,
1069     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(4),
1070     &xx_ei.move_direction_initial,      MV_START_AUTOMATIC,
1071     &yy_ei.move_direction_initial
1072   },
1073   {
1074     -1,                                 -1,
1075     TYPE_INTEGER,                       CONF_VALUE_8_BIT(5),
1076     &xx_ei.move_stepsize,               TILEX / 8,
1077     &yy_ei.move_stepsize
1078   },
1079
1080   {
1081     -1,                                 -1,
1082     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(12),
1083     &xx_ei.move_enter_element,          EL_EMPTY_SPACE,
1084     &yy_ei.move_enter_element
1085   },
1086   {
1087     -1,                                 -1,
1088     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(13),
1089     &xx_ei.move_leave_element,          EL_EMPTY_SPACE,
1090     &yy_ei.move_leave_element
1091   },
1092   {
1093     -1,                                 -1,
1094     TYPE_INTEGER,                       CONF_VALUE_8_BIT(6),
1095     &xx_ei.move_leave_type,             LEAVE_TYPE_UNLIMITED,
1096     &yy_ei.move_leave_type
1097   },
1098
1099   {
1100     -1,                                 -1,
1101     TYPE_INTEGER,                       CONF_VALUE_8_BIT(7),
1102     &xx_ei.slippery_type,               SLIPPERY_ANY_RANDOM,
1103     &yy_ei.slippery_type
1104   },
1105
1106   {
1107     -1,                                 -1,
1108     TYPE_INTEGER,                       CONF_VALUE_8_BIT(8),
1109     &xx_ei.explosion_type,              EXPLODES_3X3,
1110     &yy_ei.explosion_type
1111   },
1112   {
1113     -1,                                 -1,
1114     TYPE_INTEGER,                       CONF_VALUE_16_BIT(14),
1115     &xx_ei.explosion_delay,             16,
1116     &yy_ei.explosion_delay
1117   },
1118   {
1119     -1,                                 -1,
1120     TYPE_INTEGER,                       CONF_VALUE_16_BIT(15),
1121     &xx_ei.ignition_delay,              8,
1122     &yy_ei.ignition_delay
1123   },
1124
1125   {
1126     -1,                                 -1,
1127     TYPE_CONTENT_LIST,                  CONF_VALUE_BYTES(2),
1128     &xx_ei.content,                     EL_EMPTY_SPACE,
1129     &yy_ei.content,
1130     &xx_num_contents,                   1, 1
1131   },
1132
1133   // ---------- "num_change_pages" must be the last entry ---------------------
1134
1135   {
1136     -1,                                 SAVE_CONF_ALWAYS,
1137     TYPE_INTEGER,                       CONF_VALUE_8_BIT(9),
1138     &xx_ei.num_change_pages,            1,
1139     &yy_ei.num_change_pages
1140   },
1141
1142   {
1143     -1,                                 -1,
1144     -1,                                 -1,
1145     NULL,                               -1,
1146     NULL
1147   }
1148 };
1149
1150 static struct LevelFileConfigInfo chunk_config_CUSX_change[] =
1151 {
1152   // ---------- "current_change_page" must be the first entry -----------------
1153
1154   {
1155     -1,                                 SAVE_CONF_ALWAYS,
1156     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
1157     &xx_current_change_page,            -1
1158   },
1159
1160   // ---------- (the remaining entries can be in any order) -------------------
1161
1162   {
1163     -1,                                 -1,
1164     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
1165     &xx_change.can_change,              FALSE
1166   },
1167
1168   {
1169     -1,                                 -1,
1170     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(1),
1171     &xx_event_bits[0],                  0
1172   },
1173   {
1174     -1,                                 -1,
1175     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(2),
1176     &xx_event_bits[1],                  0
1177   },
1178
1179   {
1180     -1,                                 -1,
1181     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(3),
1182     &xx_change.trigger_player,          CH_PLAYER_ANY
1183   },
1184   {
1185     -1,                                 -1,
1186     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(4),
1187     &xx_change.trigger_side,            CH_SIDE_ANY
1188   },
1189   {
1190     -1,                                 -1,
1191     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(3),
1192     &xx_change.trigger_page,            CH_PAGE_ANY
1193   },
1194
1195   {
1196     -1,                                 -1,
1197     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
1198     &xx_change.target_element,          EL_EMPTY_SPACE
1199   },
1200
1201   {
1202     -1,                                 -1,
1203     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
1204     &xx_change.delay_fixed,             0
1205   },
1206   {
1207     -1,                                 -1,
1208     TYPE_INTEGER,                       CONF_VALUE_16_BIT(3),
1209     &xx_change.delay_random,            0
1210   },
1211   {
1212     -1,                                 -1,
1213     TYPE_INTEGER,                       CONF_VALUE_16_BIT(4),
1214     &xx_change.delay_frames,            FRAMES_PER_SECOND
1215   },
1216
1217   {
1218     -1,                                 -1,
1219     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(5),
1220     &xx_change.initial_trigger_element, EL_EMPTY_SPACE
1221   },
1222
1223   {
1224     -1,                                 -1,
1225     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(6),
1226     &xx_change.explode,                 FALSE
1227   },
1228   {
1229     -1,                                 -1,
1230     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(7),
1231     &xx_change.use_target_content,      FALSE
1232   },
1233   {
1234     -1,                                 -1,
1235     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(8),
1236     &xx_change.only_if_complete,        FALSE
1237   },
1238   {
1239     -1,                                 -1,
1240     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
1241     &xx_change.use_random_replace,      FALSE
1242   },
1243   {
1244     -1,                                 -1,
1245     TYPE_INTEGER,                       CONF_VALUE_8_BIT(10),
1246     &xx_change.random_percentage,       100
1247   },
1248   {
1249     -1,                                 -1,
1250     TYPE_INTEGER,                       CONF_VALUE_8_BIT(11),
1251     &xx_change.replace_when,            CP_WHEN_EMPTY
1252   },
1253
1254   {
1255     -1,                                 -1,
1256     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(12),
1257     &xx_change.has_action,              FALSE
1258   },
1259   {
1260     -1,                                 -1,
1261     TYPE_INTEGER,                       CONF_VALUE_8_BIT(13),
1262     &xx_change.action_type,             CA_NO_ACTION
1263   },
1264   {
1265     -1,                                 -1,
1266     TYPE_INTEGER,                       CONF_VALUE_8_BIT(14),
1267     &xx_change.action_mode,             CA_MODE_UNDEFINED
1268   },
1269   {
1270     -1,                                 -1,
1271     TYPE_INTEGER,                       CONF_VALUE_16_BIT(6),
1272     &xx_change.action_arg,              CA_ARG_UNDEFINED
1273   },
1274
1275   {
1276     -1,                                 -1,
1277     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(7),
1278     &xx_change.action_element,          EL_EMPTY_SPACE
1279   },
1280
1281   {
1282     -1,                                 -1,
1283     TYPE_CONTENT_LIST,                  CONF_VALUE_BYTES(1),
1284     &xx_change.target_content,          EL_EMPTY_SPACE, NULL,
1285     &xx_num_contents,                   1, 1
1286   },
1287
1288   {
1289     -1,                                 -1,
1290     -1,                                 -1,
1291     NULL,                               -1
1292   }
1293 };
1294
1295 static struct LevelFileConfigInfo chunk_config_GRPX[] =
1296 {
1297   {
1298     -1,                                 -1,
1299     TYPE_STRING,                        CONF_VALUE_BYTES(1),
1300     &xx_ei.description[0],              -1, NULL,
1301     &xx_string_length_unused,           -1, MAX_ELEMENT_NAME_LEN,
1302     &xx_default_description[0]
1303   },
1304
1305   {
1306     -1,                                 -1,
1307     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
1308     &xx_ei.use_gfx_element,             FALSE
1309   },
1310   {
1311     -1,                                 -1,
1312     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
1313     &xx_ei.gfx_element_initial,         EL_EMPTY_SPACE
1314   },
1315
1316   {
1317     -1,                                 -1,
1318     TYPE_INTEGER,                       CONF_VALUE_8_BIT(2),
1319     &xx_group.choice_mode,              ANIM_RANDOM
1320   },
1321
1322   {
1323     -1,                                 -1,
1324     TYPE_ELEMENT_LIST,                  CONF_VALUE_BYTES(2),
1325     &xx_group.element[0],               EL_EMPTY_SPACE, NULL,
1326     &xx_group.num_elements,             1, MAX_ELEMENTS_IN_GROUP
1327   },
1328
1329   {
1330     -1,                                 -1,
1331     -1,                                 -1,
1332     NULL,                               -1
1333   }
1334 };
1335
1336 static struct LevelFileConfigInfo chunk_config_CONF[] =         // (OBSOLETE)
1337 {
1338   {
1339     EL_PLAYER_1,                        -1,
1340     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
1341     &li.block_snap_field,               TRUE
1342   },
1343   {
1344     EL_PLAYER_1,                        -1,
1345     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(13),
1346     &li.continuous_snapping,            TRUE
1347   },
1348   {
1349     EL_PLAYER_1,                        -1,
1350     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
1351     &li.initial_player_stepsize[0],     STEPSIZE_NORMAL
1352   },
1353   {
1354     EL_PLAYER_1,                        -1,
1355     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(10),
1356     &li.use_start_element[0],           FALSE
1357   },
1358   {
1359     EL_PLAYER_1,                        -1,
1360     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
1361     &li.start_element[0],               EL_PLAYER_1
1362   },
1363   {
1364     EL_PLAYER_1,                        -1,
1365     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(11),
1366     &li.use_artwork_element[0],         FALSE
1367   },
1368   {
1369     EL_PLAYER_1,                        -1,
1370     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(2),
1371     &li.artwork_element[0],             EL_PLAYER_1
1372   },
1373   {
1374     EL_PLAYER_1,                        -1,
1375     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(12),
1376     &li.use_explosion_element[0],       FALSE
1377   },
1378   {
1379     EL_PLAYER_1,                        -1,
1380     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(3),
1381     &li.explosion_element[0],           EL_PLAYER_1
1382   },
1383
1384   {
1385     -1,                                 -1,
1386     -1,                                 -1,
1387     NULL,                               -1
1388   }
1389 };
1390
1391 static struct
1392 {
1393   int filetype;
1394   char *id;
1395 }
1396 filetype_id_list[] =
1397 {
1398   { LEVEL_FILE_TYPE_RND,        "RND"   },
1399   { LEVEL_FILE_TYPE_BD,         "BD"    },
1400   { LEVEL_FILE_TYPE_EM,         "EM"    },
1401   { LEVEL_FILE_TYPE_SP,         "SP"    },
1402   { LEVEL_FILE_TYPE_DX,         "DX"    },
1403   { LEVEL_FILE_TYPE_SB,         "SB"    },
1404   { LEVEL_FILE_TYPE_DC,         "DC"    },
1405   { LEVEL_FILE_TYPE_MM,         "MM"    },
1406   { LEVEL_FILE_TYPE_MM,         "DF"    },
1407   { -1,                         NULL    },
1408 };
1409
1410
1411 // ============================================================================
1412 // level file functions
1413 // ============================================================================
1414
1415 static boolean check_special_flags(char *flag)
1416 {
1417   if (strEqual(options.special_flags, flag) ||
1418       strEqual(leveldir_current->special_flags, flag))
1419     return TRUE;
1420
1421   return FALSE;
1422 }
1423
1424 static struct DateInfo getCurrentDate(void)
1425 {
1426   time_t epoch_seconds = time(NULL);
1427   struct tm *now = localtime(&epoch_seconds);
1428   struct DateInfo date;
1429
1430   date.year  = now->tm_year + 1900;
1431   date.month = now->tm_mon  + 1;
1432   date.day   = now->tm_mday;
1433
1434   date.src   = DATE_SRC_CLOCK;
1435
1436   return date;
1437 }
1438
1439 static void resetEventFlags(struct ElementChangeInfo *change)
1440 {
1441   int i;
1442
1443   for (i = 0; i < NUM_CHANGE_EVENTS; i++)
1444     change->has_event[i] = FALSE;
1445 }
1446
1447 static void resetEventBits(void)
1448 {
1449   int i;
1450
1451   for (i = 0; i < NUM_CE_BITFIELDS; i++)
1452     xx_event_bits[i] = 0;
1453 }
1454
1455 static void setEventFlagsFromEventBits(struct ElementChangeInfo *change)
1456 {
1457   int i;
1458
1459   /* important: only change event flag if corresponding event bit is set
1460      (this is because all xx_event_bits[] values are loaded separately,
1461      and all xx_event_bits[] values are set back to zero before loading
1462      another value xx_event_bits[x] (each value representing 32 flags)) */
1463
1464   for (i = 0; i < NUM_CHANGE_EVENTS; i++)
1465     if (xx_event_bits[CH_EVENT_BITFIELD_NR(i)] & CH_EVENT_BIT(i))
1466       change->has_event[i] = TRUE;
1467 }
1468
1469 static void setEventBitsFromEventFlags(struct ElementChangeInfo *change)
1470 {
1471   int i;
1472
1473   /* in contrast to the above function setEventFlagsFromEventBits(), it
1474      would also be possible to set all bits in xx_event_bits[] to 0 or 1
1475      depending on the corresponding change->has_event[i] values here, as
1476      all xx_event_bits[] values are reset in resetEventBits() before */
1477
1478   for (i = 0; i < NUM_CHANGE_EVENTS; i++)
1479     if (change->has_event[i])
1480       xx_event_bits[CH_EVENT_BITFIELD_NR(i)] |= CH_EVENT_BIT(i);
1481 }
1482
1483 static char *getDefaultElementDescription(struct ElementInfo *ei)
1484 {
1485   static char description[MAX_ELEMENT_NAME_LEN + 1];
1486   char *default_description = (ei->custom_description != NULL ?
1487                                ei->custom_description :
1488                                ei->editor_description);
1489   int i;
1490
1491   // always start with reliable default values
1492   for (i = 0; i < MAX_ELEMENT_NAME_LEN + 1; i++)
1493     description[i] = '\0';
1494
1495   // truncate element description to MAX_ELEMENT_NAME_LEN bytes
1496   strncpy(description, default_description, MAX_ELEMENT_NAME_LEN);
1497
1498   return &description[0];
1499 }
1500
1501 static void setElementDescriptionToDefault(struct ElementInfo *ei)
1502 {
1503   char *default_description = getDefaultElementDescription(ei);
1504   int i;
1505
1506   for (i = 0; i < MAX_ELEMENT_NAME_LEN + 1; i++)
1507     ei->description[i] = default_description[i];
1508 }
1509
1510 static void setConfigToDefaultsFromConfigList(struct LevelFileConfigInfo *conf)
1511 {
1512   int i;
1513
1514   for (i = 0; conf[i].data_type != -1; i++)
1515   {
1516     int default_value = conf[i].default_value;
1517     int data_type = conf[i].data_type;
1518     int conf_type = conf[i].conf_type;
1519     int byte_mask = conf_type & CONF_MASK_BYTES;
1520
1521     if (byte_mask == CONF_MASK_MULTI_BYTES)
1522     {
1523       int default_num_entities = conf[i].default_num_entities;
1524       int max_num_entities = conf[i].max_num_entities;
1525
1526       *(int *)(conf[i].num_entities) = default_num_entities;
1527
1528       if (data_type == TYPE_STRING)
1529       {
1530         char *default_string = conf[i].default_string;
1531         char *string = (char *)(conf[i].value);
1532
1533         strncpy(string, default_string, max_num_entities);
1534       }
1535       else if (data_type == TYPE_ELEMENT_LIST)
1536       {
1537         int *element_array = (int *)(conf[i].value);
1538         int j;
1539
1540         for (j = 0; j < max_num_entities; j++)
1541           element_array[j] = default_value;
1542       }
1543       else if (data_type == TYPE_CONTENT_LIST)
1544       {
1545         struct Content *content = (struct Content *)(conf[i].value);
1546         int c, x, y;
1547
1548         for (c = 0; c < max_num_entities; c++)
1549           for (y = 0; y < 3; y++)
1550             for (x = 0; x < 3; x++)
1551               content[c].e[x][y] = default_value;
1552       }
1553     }
1554     else        // constant size configuration data (1, 2 or 4 bytes)
1555     {
1556       if (data_type == TYPE_BOOLEAN)
1557         *(boolean *)(conf[i].value) = default_value;
1558       else
1559         *(int *)    (conf[i].value) = default_value;
1560     }
1561   }
1562 }
1563
1564 static void copyConfigFromConfigList(struct LevelFileConfigInfo *conf)
1565 {
1566   int i;
1567
1568   for (i = 0; conf[i].data_type != -1; i++)
1569   {
1570     int data_type = conf[i].data_type;
1571     int conf_type = conf[i].conf_type;
1572     int byte_mask = conf_type & CONF_MASK_BYTES;
1573
1574     if (byte_mask == CONF_MASK_MULTI_BYTES)
1575     {
1576       int max_num_entities = conf[i].max_num_entities;
1577
1578       if (data_type == TYPE_STRING)
1579       {
1580         char *string      = (char *)(conf[i].value);
1581         char *string_copy = (char *)(conf[i].value_copy);
1582
1583         strncpy(string_copy, string, max_num_entities);
1584       }
1585       else if (data_type == TYPE_ELEMENT_LIST)
1586       {
1587         int *element_array      = (int *)(conf[i].value);
1588         int *element_array_copy = (int *)(conf[i].value_copy);
1589         int j;
1590
1591         for (j = 0; j < max_num_entities; j++)
1592           element_array_copy[j] = element_array[j];
1593       }
1594       else if (data_type == TYPE_CONTENT_LIST)
1595       {
1596         struct Content *content      = (struct Content *)(conf[i].value);
1597         struct Content *content_copy = (struct Content *)(conf[i].value_copy);
1598         int c, x, y;
1599
1600         for (c = 0; c < max_num_entities; c++)
1601           for (y = 0; y < 3; y++)
1602             for (x = 0; x < 3; x++)
1603               content_copy[c].e[x][y] = content[c].e[x][y];
1604       }
1605     }
1606     else        // constant size configuration data (1, 2 or 4 bytes)
1607     {
1608       if (data_type == TYPE_BOOLEAN)
1609         *(boolean *)(conf[i].value_copy) = *(boolean *)(conf[i].value);
1610       else
1611         *(int *)    (conf[i].value_copy) = *(int *)    (conf[i].value);
1612     }
1613   }
1614 }
1615
1616 void copyElementInfo(struct ElementInfo *ei_from, struct ElementInfo *ei_to)
1617 {
1618   int i;
1619
1620   xx_ei = *ei_from;     // copy element data into temporary buffer
1621   yy_ei = *ei_to;       // copy element data into temporary buffer
1622
1623   copyConfigFromConfigList(chunk_config_CUSX_base);
1624
1625   *ei_from = xx_ei;
1626   *ei_to   = yy_ei;
1627
1628   // ---------- reinitialize and copy change pages ----------
1629
1630   ei_to->num_change_pages = ei_from->num_change_pages;
1631   ei_to->current_change_page = ei_from->current_change_page;
1632
1633   setElementChangePages(ei_to, ei_to->num_change_pages);
1634
1635   for (i = 0; i < ei_to->num_change_pages; i++)
1636     ei_to->change_page[i] = ei_from->change_page[i];
1637
1638   // ---------- copy group element info ----------
1639   if (ei_from->group != NULL && ei_to->group != NULL)   // group or internal
1640     *ei_to->group = *ei_from->group;
1641
1642   // mark this custom element as modified
1643   ei_to->modified_settings = TRUE;
1644 }
1645
1646 void setElementChangePages(struct ElementInfo *ei, int change_pages)
1647 {
1648   int change_page_size = sizeof(struct ElementChangeInfo);
1649
1650   ei->num_change_pages = MAX(1, change_pages);
1651
1652   ei->change_page =
1653     checked_realloc(ei->change_page, ei->num_change_pages * change_page_size);
1654
1655   if (ei->current_change_page >= ei->num_change_pages)
1656     ei->current_change_page = ei->num_change_pages - 1;
1657
1658   ei->change = &ei->change_page[ei->current_change_page];
1659 }
1660
1661 void setElementChangeInfoToDefaults(struct ElementChangeInfo *change)
1662 {
1663   xx_change = *change;          // copy change data into temporary buffer
1664
1665   setConfigToDefaultsFromConfigList(chunk_config_CUSX_change);
1666
1667   *change = xx_change;
1668
1669   resetEventFlags(change);
1670
1671   change->direct_action = 0;
1672   change->other_action = 0;
1673
1674   change->pre_change_function = NULL;
1675   change->change_function = NULL;
1676   change->post_change_function = NULL;
1677 }
1678
1679 static void setLevelInfoToDefaults_Level(struct LevelInfo *level)
1680 {
1681   int i, x, y;
1682
1683   li = *level;          // copy level data into temporary buffer
1684   setConfigToDefaultsFromConfigList(chunk_config_INFO);
1685   *level = li;          // copy temporary buffer back to level data
1686
1687   setLevelInfoToDefaults_EM();
1688   setLevelInfoToDefaults_SP();
1689   setLevelInfoToDefaults_MM();
1690
1691   level->native_em_level = &native_em_level;
1692   level->native_sp_level = &native_sp_level;
1693   level->native_mm_level = &native_mm_level;
1694
1695   level->file_version = FILE_VERSION_ACTUAL;
1696   level->game_version = GAME_VERSION_ACTUAL;
1697
1698   level->creation_date = getCurrentDate();
1699
1700   level->encoding_16bit_field  = TRUE;
1701   level->encoding_16bit_yamyam = TRUE;
1702   level->encoding_16bit_amoeba = TRUE;
1703
1704   // clear level name and level author string buffers
1705   for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
1706     level->name[i] = '\0';
1707   for (i = 0; i < MAX_LEVEL_AUTHOR_LEN; i++)
1708     level->author[i] = '\0';
1709
1710   // set level name and level author to default values
1711   strcpy(level->name, NAMELESS_LEVEL_NAME);
1712   strcpy(level->author, ANONYMOUS_NAME);
1713
1714   // set level playfield to playable default level with player and exit
1715   for (x = 0; x < MAX_LEV_FIELDX; x++)
1716     for (y = 0; y < MAX_LEV_FIELDY; y++)
1717       level->field[x][y] = EL_SAND;
1718
1719   level->field[0][0] = EL_PLAYER_1;
1720   level->field[STD_LEV_FIELDX - 1][STD_LEV_FIELDY - 1] = EL_EXIT_CLOSED;
1721
1722   BorderElement = EL_STEELWALL;
1723
1724   // detect custom elements when loading them
1725   level->file_has_custom_elements = FALSE;
1726
1727   // set all bug compatibility flags to "false" => do not emulate this bug
1728   level->use_action_after_change_bug = FALSE;
1729
1730   if (leveldir_current)
1731   {
1732     // try to determine better author name than 'anonymous'
1733     if (!strEqual(leveldir_current->author, ANONYMOUS_NAME))
1734     {
1735       strncpy(level->author, leveldir_current->author, MAX_LEVEL_AUTHOR_LEN);
1736       level->author[MAX_LEVEL_AUTHOR_LEN] = '\0';
1737     }
1738     else
1739     {
1740       switch (LEVELCLASS(leveldir_current))
1741       {
1742         case LEVELCLASS_TUTORIAL:
1743           strcpy(level->author, PROGRAM_AUTHOR_STRING);
1744           break;
1745
1746         case LEVELCLASS_CONTRIB:
1747           strncpy(level->author, leveldir_current->name, MAX_LEVEL_AUTHOR_LEN);
1748           level->author[MAX_LEVEL_AUTHOR_LEN] = '\0';
1749           break;
1750
1751         case LEVELCLASS_PRIVATE:
1752           strncpy(level->author, getRealName(), MAX_LEVEL_AUTHOR_LEN);
1753           level->author[MAX_LEVEL_AUTHOR_LEN] = '\0';
1754           break;
1755
1756         default:
1757           // keep default value
1758           break;
1759       }
1760     }
1761   }
1762 }
1763
1764 static void setLevelInfoToDefaults_Elements(struct LevelInfo *level)
1765 {
1766   static boolean clipboard_elements_initialized = FALSE;
1767   int i;
1768
1769   InitElementPropertiesStatic();
1770
1771   li = *level;          // copy level data into temporary buffer
1772   setConfigToDefaultsFromConfigList(chunk_config_ELEM);
1773   *level = li;          // copy temporary buffer back to level data
1774
1775   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
1776   {
1777     int element = i;
1778     struct ElementInfo *ei = &element_info[element];
1779
1780     // never initialize clipboard elements after the very first time
1781     // (to be able to use clipboard elements between several levels)
1782     if (IS_CLIPBOARD_ELEMENT(element) && clipboard_elements_initialized)
1783       continue;
1784
1785     if (IS_ENVELOPE(element))
1786     {
1787       int envelope_nr = element - EL_ENVELOPE_1;
1788
1789       setConfigToDefaultsFromConfigList(chunk_config_NOTE);
1790
1791       level->envelope[envelope_nr] = xx_envelope;
1792     }
1793
1794     if (IS_CUSTOM_ELEMENT(element) ||
1795         IS_GROUP_ELEMENT(element) ||
1796         IS_INTERNAL_ELEMENT(element))
1797     {
1798       xx_ei = *ei;      // copy element data into temporary buffer
1799
1800       setConfigToDefaultsFromConfigList(chunk_config_CUSX_base);
1801
1802       *ei = xx_ei;
1803     }
1804
1805     setElementChangePages(ei, 1);
1806     setElementChangeInfoToDefaults(ei->change);
1807
1808     if (IS_CUSTOM_ELEMENT(element) ||
1809         IS_GROUP_ELEMENT(element) ||
1810         IS_INTERNAL_ELEMENT(element))
1811     {
1812       setElementDescriptionToDefault(ei);
1813
1814       ei->modified_settings = FALSE;
1815     }
1816
1817     if (IS_CUSTOM_ELEMENT(element) ||
1818         IS_INTERNAL_ELEMENT(element))
1819     {
1820       // internal values used in level editor
1821
1822       ei->access_type = 0;
1823       ei->access_layer = 0;
1824       ei->access_protected = 0;
1825       ei->walk_to_action = 0;
1826       ei->smash_targets = 0;
1827       ei->deadliness = 0;
1828
1829       ei->can_explode_by_fire = FALSE;
1830       ei->can_explode_smashed = FALSE;
1831       ei->can_explode_impact = FALSE;
1832
1833       ei->current_change_page = 0;
1834     }
1835
1836     if (IS_GROUP_ELEMENT(element) ||
1837         IS_INTERNAL_ELEMENT(element))
1838     {
1839       struct ElementGroupInfo *group;
1840
1841       // initialize memory for list of elements in group
1842       if (ei->group == NULL)
1843         ei->group = checked_malloc(sizeof(struct ElementGroupInfo));
1844
1845       group = ei->group;
1846
1847       xx_group = *group;        // copy group data into temporary buffer
1848
1849       setConfigToDefaultsFromConfigList(chunk_config_GRPX);
1850
1851       *group = xx_group;
1852     }
1853   }
1854
1855   clipboard_elements_initialized = TRUE;
1856 }
1857
1858 static void setLevelInfoToDefaults(struct LevelInfo *level,
1859                                    boolean level_info_only,
1860                                    boolean reset_file_status)
1861 {
1862   setLevelInfoToDefaults_Level(level);
1863
1864   if (!level_info_only)
1865     setLevelInfoToDefaults_Elements(level);
1866
1867   if (reset_file_status)
1868   {
1869     level->no_valid_file = FALSE;
1870     level->no_level_file = FALSE;
1871   }
1872
1873   level->changed = FALSE;
1874 }
1875
1876 static void setFileInfoToDefaults(struct LevelFileInfo *level_file_info)
1877 {
1878   level_file_info->nr = 0;
1879   level_file_info->type = LEVEL_FILE_TYPE_UNKNOWN;
1880   level_file_info->packed = FALSE;
1881
1882   setString(&level_file_info->basename, NULL);
1883   setString(&level_file_info->filename, NULL);
1884 }
1885
1886 int getMappedElement_SB(int, boolean);
1887
1888 static void ActivateLevelTemplate(void)
1889 {
1890   int x, y;
1891
1892   if (check_special_flags("load_xsb_to_ces"))
1893   {
1894     // fill smaller playfields with padding "beyond border wall" elements
1895     if (level.fieldx < level_template.fieldx ||
1896         level.fieldy < level_template.fieldy)
1897     {
1898       short field[level.fieldx][level.fieldy];
1899       int new_fieldx = MAX(level.fieldx, level_template.fieldx);
1900       int new_fieldy = MAX(level.fieldy, level_template.fieldy);
1901       int pos_fieldx = (new_fieldx - level.fieldx) / 2;
1902       int pos_fieldy = (new_fieldy - level.fieldy) / 2;
1903
1904       // copy old playfield (which is smaller than the visible area)
1905       for (y = 0; y < level.fieldy; y++) for (x = 0; x < level.fieldx; x++)
1906         field[x][y] = level.field[x][y];
1907
1908       // fill new, larger playfield with "beyond border wall" elements
1909       for (y = 0; y < new_fieldy; y++) for (x = 0; x < new_fieldx; x++)
1910         level.field[x][y] = getMappedElement_SB('_', TRUE);
1911
1912       // copy the old playfield to the middle of the new playfield
1913       for (y = 0; y < level.fieldy; y++) for (x = 0; x < level.fieldx; x++)
1914         level.field[pos_fieldx + x][pos_fieldy + y] = field[x][y];
1915
1916       level.fieldx = new_fieldx;
1917       level.fieldy = new_fieldy;
1918     }
1919   }
1920
1921   // Currently there is no special action needed to activate the template
1922   // data, because 'element_info' property settings overwrite the original
1923   // level data, while all other variables do not change.
1924
1925   // Exception: 'from_level_template' elements in the original level playfield
1926   // are overwritten with the corresponding elements at the same position in
1927   // playfield from the level template.
1928
1929   for (x = 0; x < level.fieldx; x++)
1930     for (y = 0; y < level.fieldy; y++)
1931       if (level.field[x][y] == EL_FROM_LEVEL_TEMPLATE)
1932         level.field[x][y] = level_template.field[x][y];
1933
1934   if (check_special_flags("load_xsb_to_ces"))
1935   {
1936     struct LevelInfo level_backup = level;
1937
1938     // overwrite all individual level settings from template level settings
1939     level = level_template;
1940
1941     // restore level file info
1942     level.file_info = level_backup.file_info;
1943
1944     // restore playfield size
1945     level.fieldx = level_backup.fieldx;
1946     level.fieldy = level_backup.fieldy;
1947
1948     // restore playfield content
1949     for (x = 0; x < level.fieldx; x++)
1950       for (y = 0; y < level.fieldy; y++)
1951         level.field[x][y] = level_backup.field[x][y];
1952
1953     // restore name and author from individual level
1954     strcpy(level.name,   level_backup.name);
1955     strcpy(level.author, level_backup.author);
1956
1957     // restore flag "use_custom_template"
1958     level.use_custom_template = level_backup.use_custom_template;
1959   }
1960 }
1961
1962 static char *getLevelFilenameFromBasename(char *basename)
1963 {
1964   static char *filename = NULL;
1965
1966   checked_free(filename);
1967
1968   filename = getPath2(getCurrentLevelDir(), basename);
1969
1970   return filename;
1971 }
1972
1973 static int getFileTypeFromBasename(char *basename)
1974 {
1975   // !!! ALSO SEE COMMENT IN checkForPackageFromBasename() !!!
1976
1977   static char *filename = NULL;
1978   struct stat file_status;
1979
1980   // ---------- try to determine file type from filename ----------
1981
1982   // check for typical filename of a Supaplex level package file
1983   if (strlen(basename) == 10 && strPrefixLower(basename, "levels.d"))
1984     return LEVEL_FILE_TYPE_SP;
1985
1986   // check for typical filename of a Diamond Caves II level package file
1987   if (strSuffixLower(basename, ".dc") ||
1988       strSuffixLower(basename, ".dc2"))
1989     return LEVEL_FILE_TYPE_DC;
1990
1991   // check for typical filename of a Sokoban level package file
1992   if (strSuffixLower(basename, ".xsb") &&
1993       strchr(basename, '%') == NULL)
1994     return LEVEL_FILE_TYPE_SB;
1995
1996   // ---------- try to determine file type from filesize ----------
1997
1998   checked_free(filename);
1999   filename = getPath2(getCurrentLevelDir(), basename);
2000
2001   if (stat(filename, &file_status) == 0)
2002   {
2003     // check for typical filesize of a Supaplex level package file
2004     if (file_status.st_size == 170496)
2005       return LEVEL_FILE_TYPE_SP;
2006   }
2007
2008   return LEVEL_FILE_TYPE_UNKNOWN;
2009 }
2010
2011 static int getFileTypeFromMagicBytes(char *filename, int type)
2012 {
2013   File *file;
2014
2015   if ((file = openFile(filename, MODE_READ)))
2016   {
2017     char chunk_name[CHUNK_ID_LEN + 1];
2018
2019     getFileChunkBE(file, chunk_name, NULL);
2020
2021     if (strEqual(chunk_name, "MMII") ||
2022         strEqual(chunk_name, "MIRR"))
2023       type = LEVEL_FILE_TYPE_MM;
2024
2025     closeFile(file);
2026   }
2027
2028   return type;
2029 }
2030
2031 static boolean checkForPackageFromBasename(char *basename)
2032 {
2033   // !!! WON'T WORK ANYMORE IF getFileTypeFromBasename() ALSO DETECTS !!!
2034   // !!! SINGLE LEVELS (CURRENTLY ONLY DETECTS LEVEL PACKAGES         !!!
2035
2036   return (getFileTypeFromBasename(basename) != LEVEL_FILE_TYPE_UNKNOWN);
2037 }
2038
2039 static char *getSingleLevelBasenameExt(int nr, char *extension)
2040 {
2041   static char basename[MAX_FILENAME_LEN];
2042
2043   if (nr < 0)
2044     sprintf(basename, "%s", LEVELTEMPLATE_FILENAME);
2045   else
2046     sprintf(basename, "%03d.%s", nr, extension);
2047
2048   return basename;
2049 }
2050
2051 static char *getSingleLevelBasename(int nr)
2052 {
2053   return getSingleLevelBasenameExt(nr, LEVELFILE_EXTENSION);
2054 }
2055
2056 static char *getPackedLevelBasename(int type)
2057 {
2058   static char basename[MAX_FILENAME_LEN];
2059   char *directory = getCurrentLevelDir();
2060   Directory *dir;
2061   DirectoryEntry *dir_entry;
2062
2063   strcpy(basename, UNDEFINED_FILENAME);         // default: undefined file
2064
2065   if ((dir = openDirectory(directory)) == NULL)
2066   {
2067     Error(ERR_WARN, "cannot read current level directory '%s'", directory);
2068
2069     return basename;
2070   }
2071
2072   while ((dir_entry = readDirectory(dir)) != NULL)      // loop all entries
2073   {
2074     char *entry_basename = dir_entry->basename;
2075     int entry_type = getFileTypeFromBasename(entry_basename);
2076
2077     if (entry_type != LEVEL_FILE_TYPE_UNKNOWN)  // found valid level package
2078     {
2079       if (type == LEVEL_FILE_TYPE_UNKNOWN ||
2080           type == entry_type)
2081       {
2082         strcpy(basename, entry_basename);
2083
2084         break;
2085       }
2086     }
2087   }
2088
2089   closeDirectory(dir);
2090
2091   return basename;
2092 }
2093
2094 static char *getSingleLevelFilename(int nr)
2095 {
2096   return getLevelFilenameFromBasename(getSingleLevelBasename(nr));
2097 }
2098
2099 #if ENABLE_UNUSED_CODE
2100 static char *getPackedLevelFilename(int type)
2101 {
2102   return getLevelFilenameFromBasename(getPackedLevelBasename(type));
2103 }
2104 #endif
2105
2106 char *getDefaultLevelFilename(int nr)
2107 {
2108   return getSingleLevelFilename(nr);
2109 }
2110
2111 #if ENABLE_UNUSED_CODE
2112 static void setLevelFileInfo_SingleLevelFilename(struct LevelFileInfo *lfi,
2113                                                  int type)
2114 {
2115   lfi->type = type;
2116   lfi->packed = FALSE;
2117
2118   setString(&lfi->basename, getSingleLevelBasename(lfi->nr, lfi->type));
2119   setString(&lfi->filename, getLevelFilenameFromBasename(lfi->basename));
2120 }
2121 #endif
2122
2123 static void setLevelFileInfo_FormatLevelFilename(struct LevelFileInfo *lfi,
2124                                                  int type, char *format, ...)
2125 {
2126   static char basename[MAX_FILENAME_LEN];
2127   va_list ap;
2128
2129   va_start(ap, format);
2130   vsprintf(basename, format, ap);
2131   va_end(ap);
2132
2133   lfi->type = type;
2134   lfi->packed = FALSE;
2135
2136   setString(&lfi->basename, basename);
2137   setString(&lfi->filename, getLevelFilenameFromBasename(lfi->basename));
2138 }
2139
2140 static void setLevelFileInfo_PackedLevelFilename(struct LevelFileInfo *lfi,
2141                                                  int type)
2142 {
2143   lfi->type = type;
2144   lfi->packed = TRUE;
2145
2146   setString(&lfi->basename, getPackedLevelBasename(lfi->type));
2147   setString(&lfi->filename, getLevelFilenameFromBasename(lfi->basename));
2148 }
2149
2150 static int getFiletypeFromID(char *filetype_id)
2151 {
2152   char *filetype_id_lower;
2153   int filetype = LEVEL_FILE_TYPE_UNKNOWN;
2154   int i;
2155
2156   if (filetype_id == NULL)
2157     return LEVEL_FILE_TYPE_UNKNOWN;
2158
2159   filetype_id_lower = getStringToLower(filetype_id);
2160
2161   for (i = 0; filetype_id_list[i].id != NULL; i++)
2162   {
2163     char *id_lower = getStringToLower(filetype_id_list[i].id);
2164     
2165     if (strEqual(filetype_id_lower, id_lower))
2166       filetype = filetype_id_list[i].filetype;
2167
2168     free(id_lower);
2169
2170     if (filetype != LEVEL_FILE_TYPE_UNKNOWN)
2171       break;
2172   }
2173
2174   free(filetype_id_lower);
2175
2176   return filetype;
2177 }
2178
2179 char *getLocalLevelTemplateFilename(void)
2180 {
2181   return getDefaultLevelFilename(-1);
2182 }
2183
2184 char *getGlobalLevelTemplateFilename(void)
2185 {
2186   // global variable "leveldir_current" must be modified in the loop below
2187   LevelDirTree *leveldir_current_last = leveldir_current;
2188   char *filename = NULL;
2189
2190   // check for template level in path from current to topmost tree node
2191
2192   while (leveldir_current != NULL)
2193   {
2194     filename = getDefaultLevelFilename(-1);
2195
2196     if (fileExists(filename))
2197       break;
2198
2199     leveldir_current = leveldir_current->node_parent;
2200   }
2201
2202   // restore global variable "leveldir_current" modified in above loop
2203   leveldir_current = leveldir_current_last;
2204
2205   return filename;
2206 }
2207
2208 static void determineLevelFileInfo_Filename(struct LevelFileInfo *lfi)
2209 {
2210   int nr = lfi->nr;
2211
2212   // special case: level number is negative => check for level template file
2213   if (nr < 0)
2214   {
2215     setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_RND,
2216                                          getSingleLevelBasename(-1));
2217
2218     // replace local level template filename with global template filename
2219     setString(&lfi->filename, getGlobalLevelTemplateFilename());
2220
2221     // no fallback if template file not existing
2222     return;
2223   }
2224
2225   // special case: check for file name/pattern specified in "levelinfo.conf"
2226   if (leveldir_current->level_filename != NULL)
2227   {
2228     int filetype = getFiletypeFromID(leveldir_current->level_filetype);
2229
2230     setLevelFileInfo_FormatLevelFilename(lfi, filetype,
2231                                          leveldir_current->level_filename, nr);
2232
2233     lfi->packed = checkForPackageFromBasename(leveldir_current->level_filename);
2234
2235     if (fileExists(lfi->filename))
2236       return;
2237   }
2238   else if (leveldir_current->level_filetype != NULL)
2239   {
2240     int filetype = getFiletypeFromID(leveldir_current->level_filetype);
2241
2242     // check for specified native level file with standard file name
2243     setLevelFileInfo_FormatLevelFilename(lfi, filetype,
2244                                          "%03d.%s", nr, LEVELFILE_EXTENSION);
2245     if (fileExists(lfi->filename))
2246       return;
2247   }
2248
2249   // check for native Rocks'n'Diamonds level file
2250   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_RND,
2251                                        "%03d.%s", nr, LEVELFILE_EXTENSION);
2252   if (fileExists(lfi->filename))
2253     return;
2254
2255   // check for Emerald Mine level file (V1)
2256   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "a%c%c",
2257                                        'a' + (nr / 10) % 26, '0' + nr % 10);
2258   if (fileExists(lfi->filename))
2259     return;
2260   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "A%c%c",
2261                                        'A' + (nr / 10) % 26, '0' + nr % 10);
2262   if (fileExists(lfi->filename))
2263     return;
2264
2265   // check for Emerald Mine level file (V2 to V5)
2266   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%d", nr);
2267   if (fileExists(lfi->filename))
2268     return;
2269
2270   // check for Emerald Mine level file (V6 / single mode)
2271   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%02ds", nr);
2272   if (fileExists(lfi->filename))
2273     return;
2274   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%02dS", nr);
2275   if (fileExists(lfi->filename))
2276     return;
2277
2278   // check for Emerald Mine level file (V6 / teamwork mode)
2279   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%02dt", nr);
2280   if (fileExists(lfi->filename))
2281     return;
2282   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%02dT", nr);
2283   if (fileExists(lfi->filename))
2284     return;
2285
2286   // check for various packed level file formats
2287   setLevelFileInfo_PackedLevelFilename(lfi, LEVEL_FILE_TYPE_UNKNOWN);
2288   if (fileExists(lfi->filename))
2289     return;
2290
2291   // no known level file found -- use default values (and fail later)
2292   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_RND,
2293                                        "%03d.%s", nr, LEVELFILE_EXTENSION);
2294 }
2295
2296 static void determineLevelFileInfo_Filetype(struct LevelFileInfo *lfi)
2297 {
2298   if (lfi->type == LEVEL_FILE_TYPE_UNKNOWN)
2299     lfi->type = getFileTypeFromBasename(lfi->basename);
2300
2301   if (lfi->type == LEVEL_FILE_TYPE_RND)
2302     lfi->type = getFileTypeFromMagicBytes(lfi->filename, lfi->type);
2303 }
2304
2305 static void setLevelFileInfo(struct LevelFileInfo *level_file_info, int nr)
2306 {
2307   // always start with reliable default values
2308   setFileInfoToDefaults(level_file_info);
2309
2310   level_file_info->nr = nr;     // set requested level number
2311
2312   determineLevelFileInfo_Filename(level_file_info);
2313   determineLevelFileInfo_Filetype(level_file_info);
2314 }
2315
2316 static void copyLevelFileInfo(struct LevelFileInfo *lfi_from,
2317                               struct LevelFileInfo *lfi_to)
2318 {
2319   lfi_to->nr     = lfi_from->nr;
2320   lfi_to->type   = lfi_from->type;
2321   lfi_to->packed = lfi_from->packed;
2322
2323   setString(&lfi_to->basename, lfi_from->basename);
2324   setString(&lfi_to->filename, lfi_from->filename);
2325 }
2326
2327 // ----------------------------------------------------------------------------
2328 // functions for loading R'n'D level
2329 // ----------------------------------------------------------------------------
2330
2331 static int getMappedElement(int element)
2332 {
2333   // remap some (historic, now obsolete) elements
2334
2335   switch (element)
2336   {
2337     case EL_PLAYER_OBSOLETE:
2338       element = EL_PLAYER_1;
2339       break;
2340
2341     case EL_KEY_OBSOLETE:
2342       element = EL_KEY_1;
2343       break;
2344
2345     case EL_EM_KEY_1_FILE_OBSOLETE:
2346       element = EL_EM_KEY_1;
2347       break;
2348
2349     case EL_EM_KEY_2_FILE_OBSOLETE:
2350       element = EL_EM_KEY_2;
2351       break;
2352
2353     case EL_EM_KEY_3_FILE_OBSOLETE:
2354       element = EL_EM_KEY_3;
2355       break;
2356
2357     case EL_EM_KEY_4_FILE_OBSOLETE:
2358       element = EL_EM_KEY_4;
2359       break;
2360
2361     case EL_ENVELOPE_OBSOLETE:
2362       element = EL_ENVELOPE_1;
2363       break;
2364
2365     case EL_SP_EMPTY:
2366       element = EL_EMPTY;
2367       break;
2368
2369     default:
2370       if (element >= NUM_FILE_ELEMENTS)
2371       {
2372         Error(ERR_WARN, "invalid level element %d", element);
2373
2374         element = EL_UNKNOWN;
2375       }
2376       break;
2377   }
2378
2379   return element;
2380 }
2381
2382 static int getMappedElementByVersion(int element, int game_version)
2383 {
2384   // remap some elements due to certain game version
2385
2386   if (game_version <= VERSION_IDENT(2,2,0,0))
2387   {
2388     // map game font elements
2389     element = (element == EL_CHAR('[')  ? EL_CHAR_AUMLAUT :
2390                element == EL_CHAR('\\') ? EL_CHAR_OUMLAUT :
2391                element == EL_CHAR(']')  ? EL_CHAR_UUMLAUT :
2392                element == EL_CHAR('^')  ? EL_CHAR_COPYRIGHT : element);
2393   }
2394
2395   if (game_version < VERSION_IDENT(3,0,0,0))
2396   {
2397     // map Supaplex gravity tube elements
2398     element = (element == EL_SP_GRAVITY_PORT_LEFT  ? EL_SP_PORT_LEFT  :
2399                element == EL_SP_GRAVITY_PORT_RIGHT ? EL_SP_PORT_RIGHT :
2400                element == EL_SP_GRAVITY_PORT_UP    ? EL_SP_PORT_UP    :
2401                element == EL_SP_GRAVITY_PORT_DOWN  ? EL_SP_PORT_DOWN  :
2402                element);
2403   }
2404
2405   return element;
2406 }
2407
2408 static int LoadLevel_VERS(File *file, int chunk_size, struct LevelInfo *level)
2409 {
2410   level->file_version = getFileVersion(file);
2411   level->game_version = getFileVersion(file);
2412
2413   return chunk_size;
2414 }
2415
2416 static int LoadLevel_DATE(File *file, int chunk_size, struct LevelInfo *level)
2417 {
2418   level->creation_date.year  = getFile16BitBE(file);
2419   level->creation_date.month = getFile8Bit(file);
2420   level->creation_date.day   = getFile8Bit(file);
2421
2422   level->creation_date.src   = DATE_SRC_LEVELFILE;
2423
2424   return chunk_size;
2425 }
2426
2427 static int LoadLevel_HEAD(File *file, int chunk_size, struct LevelInfo *level)
2428 {
2429   int initial_player_stepsize;
2430   int initial_player_gravity;
2431   int i, x, y;
2432
2433   level->fieldx = getFile8Bit(file);
2434   level->fieldy = getFile8Bit(file);
2435
2436   level->time           = getFile16BitBE(file);
2437   level->gems_needed    = getFile16BitBE(file);
2438
2439   for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
2440     level->name[i] = getFile8Bit(file);
2441   level->name[MAX_LEVEL_NAME_LEN] = 0;
2442
2443   for (i = 0; i < LEVEL_SCORE_ELEMENTS; i++)
2444     level->score[i] = getFile8Bit(file);
2445
2446   level->num_yamyam_contents = STD_ELEMENT_CONTENTS;
2447   for (i = 0; i < STD_ELEMENT_CONTENTS; i++)
2448     for (y = 0; y < 3; y++)
2449       for (x = 0; x < 3; x++)
2450         level->yamyam_content[i].e[x][y] = getMappedElement(getFile8Bit(file));
2451
2452   level->amoeba_speed           = getFile8Bit(file);
2453   level->time_magic_wall        = getFile8Bit(file);
2454   level->time_wheel             = getFile8Bit(file);
2455   level->amoeba_content         = getMappedElement(getFile8Bit(file));
2456
2457   initial_player_stepsize       = (getFile8Bit(file) == 1 ? STEPSIZE_FAST :
2458                                    STEPSIZE_NORMAL);
2459
2460   for (i = 0; i < MAX_PLAYERS; i++)
2461     level->initial_player_stepsize[i] = initial_player_stepsize;
2462
2463   initial_player_gravity        = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2464
2465   for (i = 0; i < MAX_PLAYERS; i++)
2466     level->initial_player_gravity[i] = initial_player_gravity;
2467
2468   level->encoding_16bit_field   = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2469   level->em_slippery_gems       = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2470
2471   level->use_custom_template    = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2472
2473   level->block_last_field       = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2474   level->sp_block_last_field    = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2475   level->can_move_into_acid_bits = getFile32BitBE(file);
2476   level->dont_collide_with_bits = getFile8Bit(file);
2477
2478   level->use_spring_bug         = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2479   level->use_step_counter       = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2480
2481   level->instant_relocation     = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2482   level->can_pass_to_walkable   = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2483   level->grow_into_diggable     = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2484
2485   level->game_engine_type       = getFile8Bit(file);
2486
2487   ReadUnusedBytesFromFile(file, LEVEL_CHUNK_HEAD_UNUSED);
2488
2489   return chunk_size;
2490 }
2491
2492 static int LoadLevel_NAME(File *file, int chunk_size, struct LevelInfo *level)
2493 {
2494   int i;
2495
2496   for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
2497     level->name[i] = getFile8Bit(file);
2498   level->name[MAX_LEVEL_NAME_LEN] = 0;
2499
2500   return chunk_size;
2501 }
2502
2503 static int LoadLevel_AUTH(File *file, int chunk_size, struct LevelInfo *level)
2504 {
2505   int i;
2506
2507   for (i = 0; i < MAX_LEVEL_AUTHOR_LEN; i++)
2508     level->author[i] = getFile8Bit(file);
2509   level->author[MAX_LEVEL_AUTHOR_LEN] = 0;
2510
2511   return chunk_size;
2512 }
2513
2514 static int LoadLevel_BODY(File *file, int chunk_size, struct LevelInfo *level)
2515 {
2516   int x, y;
2517   int chunk_size_expected = level->fieldx * level->fieldy;
2518
2519   /* Note: "chunk_size" was wrong before version 2.0 when elements are
2520      stored with 16-bit encoding (and should be twice as big then).
2521      Even worse, playfield data was stored 16-bit when only yamyam content
2522      contained 16-bit elements and vice versa. */
2523
2524   if (level->encoding_16bit_field && level->file_version >= FILE_VERSION_2_0)
2525     chunk_size_expected *= 2;
2526
2527   if (chunk_size_expected != chunk_size)
2528   {
2529     ReadUnusedBytesFromFile(file, chunk_size);
2530     return chunk_size_expected;
2531   }
2532
2533   for (y = 0; y < level->fieldy; y++)
2534     for (x = 0; x < level->fieldx; x++)
2535       level->field[x][y] =
2536         getMappedElement(level->encoding_16bit_field ? getFile16BitBE(file) :
2537                          getFile8Bit(file));
2538   return chunk_size;
2539 }
2540
2541 static int LoadLevel_CONT(File *file, int chunk_size, struct LevelInfo *level)
2542 {
2543   int i, x, y;
2544   int header_size = 4;
2545   int content_size = MAX_ELEMENT_CONTENTS * 3 * 3;
2546   int chunk_size_expected = header_size + content_size;
2547
2548   /* Note: "chunk_size" was wrong before version 2.0 when elements are
2549      stored with 16-bit encoding (and should be twice as big then).
2550      Even worse, playfield data was stored 16-bit when only yamyam content
2551      contained 16-bit elements and vice versa. */
2552
2553   if (level->encoding_16bit_field && level->file_version >= FILE_VERSION_2_0)
2554     chunk_size_expected += content_size;
2555
2556   if (chunk_size_expected != chunk_size)
2557   {
2558     ReadUnusedBytesFromFile(file, chunk_size);
2559     return chunk_size_expected;
2560   }
2561
2562   getFile8Bit(file);
2563   level->num_yamyam_contents = getFile8Bit(file);
2564   getFile8Bit(file);
2565   getFile8Bit(file);
2566
2567   // correct invalid number of content fields -- should never happen
2568   if (level->num_yamyam_contents < 1 ||
2569       level->num_yamyam_contents > MAX_ELEMENT_CONTENTS)
2570     level->num_yamyam_contents = STD_ELEMENT_CONTENTS;
2571
2572   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
2573     for (y = 0; y < 3; y++)
2574       for (x = 0; x < 3; x++)
2575         level->yamyam_content[i].e[x][y] =
2576           getMappedElement(level->encoding_16bit_field ?
2577                            getFile16BitBE(file) : getFile8Bit(file));
2578   return chunk_size;
2579 }
2580
2581 static int LoadLevel_CNT2(File *file, int chunk_size, struct LevelInfo *level)
2582 {
2583   int i, x, y;
2584   int element;
2585   int num_contents;
2586   int content_array[MAX_ELEMENT_CONTENTS][3][3];
2587
2588   element = getMappedElement(getFile16BitBE(file));
2589   num_contents = getFile8Bit(file);
2590
2591   getFile8Bit(file);    // content x size (unused)
2592   getFile8Bit(file);    // content y size (unused)
2593
2594   ReadUnusedBytesFromFile(file, LEVEL_CHUNK_CNT2_UNUSED);
2595
2596   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
2597     for (y = 0; y < 3; y++)
2598       for (x = 0; x < 3; x++)
2599         content_array[i][x][y] = getMappedElement(getFile16BitBE(file));
2600
2601   // correct invalid number of content fields -- should never happen
2602   if (num_contents < 1 || num_contents > MAX_ELEMENT_CONTENTS)
2603     num_contents = STD_ELEMENT_CONTENTS;
2604
2605   if (element == EL_YAMYAM)
2606   {
2607     level->num_yamyam_contents = num_contents;
2608
2609     for (i = 0; i < num_contents; i++)
2610       for (y = 0; y < 3; y++)
2611         for (x = 0; x < 3; x++)
2612           level->yamyam_content[i].e[x][y] = content_array[i][x][y];
2613   }
2614   else if (element == EL_BD_AMOEBA)
2615   {
2616     level->amoeba_content = content_array[0][0][0];
2617   }
2618   else
2619   {
2620     Error(ERR_WARN, "cannot load content for element '%d'", element);
2621   }
2622
2623   return chunk_size;
2624 }
2625
2626 static int LoadLevel_CNT3(File *file, int chunk_size, struct LevelInfo *level)
2627 {
2628   int i;
2629   int element;
2630   int envelope_nr;
2631   int envelope_len;
2632   int chunk_size_expected;
2633
2634   element = getMappedElement(getFile16BitBE(file));
2635   if (!IS_ENVELOPE(element))
2636     element = EL_ENVELOPE_1;
2637
2638   envelope_nr = element - EL_ENVELOPE_1;
2639
2640   envelope_len = getFile16BitBE(file);
2641
2642   level->envelope[envelope_nr].xsize = getFile8Bit(file);
2643   level->envelope[envelope_nr].ysize = getFile8Bit(file);
2644
2645   ReadUnusedBytesFromFile(file, LEVEL_CHUNK_CNT3_UNUSED);
2646
2647   chunk_size_expected = LEVEL_CHUNK_CNT3_SIZE(envelope_len);
2648   if (chunk_size_expected != chunk_size)
2649   {
2650     ReadUnusedBytesFromFile(file, chunk_size - LEVEL_CHUNK_CNT3_HEADER);
2651     return chunk_size_expected;
2652   }
2653
2654   for (i = 0; i < envelope_len; i++)
2655     level->envelope[envelope_nr].text[i] = getFile8Bit(file);
2656
2657   return chunk_size;
2658 }
2659
2660 static int LoadLevel_CUS1(File *file, int chunk_size, struct LevelInfo *level)
2661 {
2662   int num_changed_custom_elements = getFile16BitBE(file);
2663   int chunk_size_expected = 2 + num_changed_custom_elements * 6;
2664   int i;
2665
2666   if (chunk_size_expected != chunk_size)
2667   {
2668     ReadUnusedBytesFromFile(file, chunk_size - 2);
2669     return chunk_size_expected;
2670   }
2671
2672   for (i = 0; i < num_changed_custom_elements; i++)
2673   {
2674     int element = getMappedElement(getFile16BitBE(file));
2675     int properties = getFile32BitBE(file);
2676
2677     if (IS_CUSTOM_ELEMENT(element))
2678       element_info[element].properties[EP_BITFIELD_BASE_NR] = properties;
2679     else
2680       Error(ERR_WARN, "invalid custom element number %d", element);
2681
2682     // older game versions that wrote level files with CUS1 chunks used
2683     // different default push delay values (not yet stored in level file)
2684     element_info[element].push_delay_fixed = 2;
2685     element_info[element].push_delay_random = 8;
2686   }
2687
2688   level->file_has_custom_elements = TRUE;
2689
2690   return chunk_size;
2691 }
2692
2693 static int LoadLevel_CUS2(File *file, int chunk_size, struct LevelInfo *level)
2694 {
2695   int num_changed_custom_elements = getFile16BitBE(file);
2696   int chunk_size_expected = 2 + num_changed_custom_elements * 4;
2697   int i;
2698
2699   if (chunk_size_expected != chunk_size)
2700   {
2701     ReadUnusedBytesFromFile(file, chunk_size - 2);
2702     return chunk_size_expected;
2703   }
2704
2705   for (i = 0; i < num_changed_custom_elements; i++)
2706   {
2707     int element = getMappedElement(getFile16BitBE(file));
2708     int custom_target_element = getMappedElement(getFile16BitBE(file));
2709
2710     if (IS_CUSTOM_ELEMENT(element))
2711       element_info[element].change->target_element = custom_target_element;
2712     else
2713       Error(ERR_WARN, "invalid custom element number %d", element);
2714   }
2715
2716   level->file_has_custom_elements = TRUE;
2717
2718   return chunk_size;
2719 }
2720
2721 static int LoadLevel_CUS3(File *file, int chunk_size, struct LevelInfo *level)
2722 {
2723   int num_changed_custom_elements = getFile16BitBE(file);
2724   int chunk_size_expected = LEVEL_CHUNK_CUS3_SIZE(num_changed_custom_elements);
2725   int i, j, x, y;
2726
2727   if (chunk_size_expected != chunk_size)
2728   {
2729     ReadUnusedBytesFromFile(file, chunk_size - 2);
2730     return chunk_size_expected;
2731   }
2732
2733   for (i = 0; i < num_changed_custom_elements; i++)
2734   {
2735     int element = getMappedElement(getFile16BitBE(file));
2736     struct ElementInfo *ei = &element_info[element];
2737     unsigned int event_bits;
2738
2739     if (!IS_CUSTOM_ELEMENT(element))
2740     {
2741       Error(ERR_WARN, "invalid custom element number %d", element);
2742
2743       element = EL_INTERNAL_DUMMY;
2744     }
2745
2746     for (j = 0; j < MAX_ELEMENT_NAME_LEN; j++)
2747       ei->description[j] = getFile8Bit(file);
2748     ei->description[MAX_ELEMENT_NAME_LEN] = 0;
2749
2750     ei->properties[EP_BITFIELD_BASE_NR] = getFile32BitBE(file);
2751
2752     // some free bytes for future properties and padding
2753     ReadUnusedBytesFromFile(file, 7);
2754
2755     ei->use_gfx_element = getFile8Bit(file);
2756     ei->gfx_element_initial = getMappedElement(getFile16BitBE(file));
2757
2758     ei->collect_score_initial = getFile8Bit(file);
2759     ei->collect_count_initial = getFile8Bit(file);
2760
2761     ei->push_delay_fixed = getFile16BitBE(file);
2762     ei->push_delay_random = getFile16BitBE(file);
2763     ei->move_delay_fixed = getFile16BitBE(file);
2764     ei->move_delay_random = getFile16BitBE(file);
2765
2766     ei->move_pattern = getFile16BitBE(file);
2767     ei->move_direction_initial = getFile8Bit(file);
2768     ei->move_stepsize = getFile8Bit(file);
2769
2770     for (y = 0; y < 3; y++)
2771       for (x = 0; x < 3; x++)
2772         ei->content.e[x][y] = getMappedElement(getFile16BitBE(file));
2773
2774     event_bits = getFile32BitBE(file);
2775     for (j = 0; j < NUM_CHANGE_EVENTS; j++)
2776       if (event_bits & (1 << j))
2777         ei->change->has_event[j] = TRUE;
2778
2779     ei->change->target_element = getMappedElement(getFile16BitBE(file));
2780
2781     ei->change->delay_fixed = getFile16BitBE(file);
2782     ei->change->delay_random = getFile16BitBE(file);
2783     ei->change->delay_frames = getFile16BitBE(file);
2784
2785     ei->change->initial_trigger_element= getMappedElement(getFile16BitBE(file));
2786
2787     ei->change->explode = getFile8Bit(file);
2788     ei->change->use_target_content = getFile8Bit(file);
2789     ei->change->only_if_complete = getFile8Bit(file);
2790     ei->change->use_random_replace = getFile8Bit(file);
2791
2792     ei->change->random_percentage = getFile8Bit(file);
2793     ei->change->replace_when = getFile8Bit(file);
2794
2795     for (y = 0; y < 3; y++)
2796       for (x = 0; x < 3; x++)
2797         ei->change->target_content.e[x][y] =
2798           getMappedElement(getFile16BitBE(file));
2799
2800     ei->slippery_type = getFile8Bit(file);
2801
2802     // some free bytes for future properties and padding
2803     ReadUnusedBytesFromFile(file, LEVEL_CPART_CUS3_UNUSED);
2804
2805     // mark that this custom element has been modified
2806     ei->modified_settings = TRUE;
2807   }
2808
2809   level->file_has_custom_elements = TRUE;
2810
2811   return chunk_size;
2812 }
2813
2814 static int LoadLevel_CUS4(File *file, int chunk_size, struct LevelInfo *level)
2815 {
2816   struct ElementInfo *ei;
2817   int chunk_size_expected;
2818   int element;
2819   int i, j, x, y;
2820
2821   // ---------- custom element base property values (96 bytes) ----------------
2822
2823   element = getMappedElement(getFile16BitBE(file));
2824
2825   if (!IS_CUSTOM_ELEMENT(element))
2826   {
2827     Error(ERR_WARN, "invalid custom element number %d", element);
2828
2829     ReadUnusedBytesFromFile(file, chunk_size - 2);
2830     return chunk_size;
2831   }
2832
2833   ei = &element_info[element];
2834
2835   for (i = 0; i < MAX_ELEMENT_NAME_LEN; i++)
2836     ei->description[i] = getFile8Bit(file);
2837   ei->description[MAX_ELEMENT_NAME_LEN] = 0;
2838
2839   ei->properties[EP_BITFIELD_BASE_NR] = getFile32BitBE(file);
2840
2841   ReadUnusedBytesFromFile(file, 4);     // reserved for more base properties
2842
2843   ei->num_change_pages = getFile8Bit(file);
2844
2845   chunk_size_expected = LEVEL_CHUNK_CUS4_SIZE(ei->num_change_pages);
2846   if (chunk_size_expected != chunk_size)
2847   {
2848     ReadUnusedBytesFromFile(file, chunk_size - 43);
2849     return chunk_size_expected;
2850   }
2851
2852   ei->ce_value_fixed_initial = getFile16BitBE(file);
2853   ei->ce_value_random_initial = getFile16BitBE(file);
2854   ei->use_last_ce_value = getFile8Bit(file);
2855
2856   ei->use_gfx_element = getFile8Bit(file);
2857   ei->gfx_element_initial = getMappedElement(getFile16BitBE(file));
2858
2859   ei->collect_score_initial = getFile8Bit(file);
2860   ei->collect_count_initial = getFile8Bit(file);
2861
2862   ei->drop_delay_fixed = getFile8Bit(file);
2863   ei->push_delay_fixed = getFile8Bit(file);
2864   ei->drop_delay_random = getFile8Bit(file);
2865   ei->push_delay_random = getFile8Bit(file);
2866   ei->move_delay_fixed = getFile16BitBE(file);
2867   ei->move_delay_random = getFile16BitBE(file);
2868
2869   // bits 0 - 15 of "move_pattern" ...
2870   ei->move_pattern = getFile16BitBE(file);
2871   ei->move_direction_initial = getFile8Bit(file);
2872   ei->move_stepsize = getFile8Bit(file);
2873
2874   ei->slippery_type = getFile8Bit(file);
2875
2876   for (y = 0; y < 3; y++)
2877     for (x = 0; x < 3; x++)
2878       ei->content.e[x][y] = getMappedElement(getFile16BitBE(file));
2879
2880   ei->move_enter_element = getMappedElement(getFile16BitBE(file));
2881   ei->move_leave_element = getMappedElement(getFile16BitBE(file));
2882   ei->move_leave_type = getFile8Bit(file);
2883
2884   // ... bits 16 - 31 of "move_pattern" (not nice, but downward compatible)
2885   ei->move_pattern |= (getFile16BitBE(file) << 16);
2886
2887   ei->access_direction = getFile8Bit(file);
2888
2889   ei->explosion_delay = getFile8Bit(file);
2890   ei->ignition_delay = getFile8Bit(file);
2891   ei->explosion_type = getFile8Bit(file);
2892
2893   // some free bytes for future custom property values and padding
2894   ReadUnusedBytesFromFile(file, 1);
2895
2896   // ---------- change page property values (48 bytes) ------------------------
2897
2898   setElementChangePages(ei, ei->num_change_pages);
2899
2900   for (i = 0; i < ei->num_change_pages; i++)
2901   {
2902     struct ElementChangeInfo *change = &ei->change_page[i];
2903     unsigned int event_bits;
2904
2905     // always start with reliable default values
2906     setElementChangeInfoToDefaults(change);
2907
2908     // bits 0 - 31 of "has_event[]" ...
2909     event_bits = getFile32BitBE(file);
2910     for (j = 0; j < MIN(NUM_CHANGE_EVENTS, 32); j++)
2911       if (event_bits & (1 << j))
2912         change->has_event[j] = TRUE;
2913
2914     change->target_element = getMappedElement(getFile16BitBE(file));
2915
2916     change->delay_fixed = getFile16BitBE(file);
2917     change->delay_random = getFile16BitBE(file);
2918     change->delay_frames = getFile16BitBE(file);
2919
2920     change->initial_trigger_element = getMappedElement(getFile16BitBE(file));
2921
2922     change->explode = getFile8Bit(file);
2923     change->use_target_content = getFile8Bit(file);
2924     change->only_if_complete = getFile8Bit(file);
2925     change->use_random_replace = getFile8Bit(file);
2926
2927     change->random_percentage = getFile8Bit(file);
2928     change->replace_when = getFile8Bit(file);
2929
2930     for (y = 0; y < 3; y++)
2931       for (x = 0; x < 3; x++)
2932         change->target_content.e[x][y]= getMappedElement(getFile16BitBE(file));
2933
2934     change->can_change = getFile8Bit(file);
2935
2936     change->trigger_side = getFile8Bit(file);
2937
2938     change->trigger_player = getFile8Bit(file);
2939     change->trigger_page = getFile8Bit(file);
2940
2941     change->trigger_page = (change->trigger_page == CH_PAGE_ANY_FILE ?
2942                             CH_PAGE_ANY : (1 << change->trigger_page));
2943
2944     change->has_action = getFile8Bit(file);
2945     change->action_type = getFile8Bit(file);
2946     change->action_mode = getFile8Bit(file);
2947     change->action_arg = getFile16BitBE(file);
2948
2949     // ... bits 32 - 39 of "has_event[]" (not nice, but downward compatible)
2950     event_bits = getFile8Bit(file);
2951     for (j = 32; j < NUM_CHANGE_EVENTS; j++)
2952       if (event_bits & (1 << (j - 32)))
2953         change->has_event[j] = TRUE;
2954   }
2955
2956   // mark this custom element as modified
2957   ei->modified_settings = TRUE;
2958
2959   level->file_has_custom_elements = TRUE;
2960
2961   return chunk_size;
2962 }
2963
2964 static int LoadLevel_GRP1(File *file, int chunk_size, struct LevelInfo *level)
2965 {
2966   struct ElementInfo *ei;
2967   struct ElementGroupInfo *group;
2968   int element;
2969   int i;
2970
2971   element = getMappedElement(getFile16BitBE(file));
2972
2973   if (!IS_GROUP_ELEMENT(element))
2974   {
2975     Error(ERR_WARN, "invalid group element number %d", element);
2976
2977     ReadUnusedBytesFromFile(file, chunk_size - 2);
2978     return chunk_size;
2979   }
2980
2981   ei = &element_info[element];
2982
2983   for (i = 0; i < MAX_ELEMENT_NAME_LEN; i++)
2984     ei->description[i] = getFile8Bit(file);
2985   ei->description[MAX_ELEMENT_NAME_LEN] = 0;
2986
2987   group = element_info[element].group;
2988
2989   group->num_elements = getFile8Bit(file);
2990
2991   ei->use_gfx_element = getFile8Bit(file);
2992   ei->gfx_element_initial = getMappedElement(getFile16BitBE(file));
2993
2994   group->choice_mode = getFile8Bit(file);
2995
2996   // some free bytes for future values and padding
2997   ReadUnusedBytesFromFile(file, 3);
2998
2999   for (i = 0; i < MAX_ELEMENTS_IN_GROUP; i++)
3000     group->element[i] = getMappedElement(getFile16BitBE(file));
3001
3002   // mark this group element as modified
3003   element_info[element].modified_settings = TRUE;
3004
3005   level->file_has_custom_elements = TRUE;
3006
3007   return chunk_size;
3008 }
3009
3010 static int LoadLevel_MicroChunk(File *file, struct LevelFileConfigInfo *conf,
3011                                 int element, int real_element)
3012 {
3013   int micro_chunk_size = 0;
3014   int conf_type = getFile8Bit(file);
3015   int byte_mask = conf_type & CONF_MASK_BYTES;
3016   boolean element_found = FALSE;
3017   int i;
3018
3019   micro_chunk_size += 1;
3020
3021   if (byte_mask == CONF_MASK_MULTI_BYTES)
3022   {
3023     int num_bytes = getFile16BitBE(file);
3024     byte *buffer = checked_malloc(num_bytes);
3025
3026     ReadBytesFromFile(file, buffer, num_bytes);
3027
3028     for (i = 0; conf[i].data_type != -1; i++)
3029     {
3030       if (conf[i].element == element &&
3031           conf[i].conf_type == conf_type)
3032       {
3033         int data_type = conf[i].data_type;
3034         int num_entities = num_bytes / CONF_ENTITY_NUM_BYTES(data_type);
3035         int max_num_entities = conf[i].max_num_entities;
3036
3037         if (num_entities > max_num_entities)
3038         {
3039           Error(ERR_WARN,
3040                 "truncating number of entities for element %d from %d to %d",
3041                 element, num_entities, max_num_entities);
3042
3043           num_entities = max_num_entities;
3044         }
3045
3046         if (num_entities == 0 && (data_type == TYPE_ELEMENT_LIST ||
3047                                   data_type == TYPE_CONTENT_LIST))
3048         {
3049           // for element and content lists, zero entities are not allowed
3050           Error(ERR_WARN, "found empty list of entities for element %d",
3051                 element);
3052
3053           // do not set "num_entities" here to prevent reading behind buffer
3054
3055           *(int *)(conf[i].num_entities) = 1;   // at least one is required
3056         }
3057         else
3058         {
3059           *(int *)(conf[i].num_entities) = num_entities;
3060         }
3061
3062         element_found = TRUE;
3063
3064         if (data_type == TYPE_STRING)
3065         {
3066           char *string = (char *)(conf[i].value);
3067           int j;
3068
3069           for (j = 0; j < max_num_entities; j++)
3070             string[j] = (j < num_entities ? buffer[j] : '\0');
3071         }
3072         else if (data_type == TYPE_ELEMENT_LIST)
3073         {
3074           int *element_array = (int *)(conf[i].value);
3075           int j;
3076
3077           for (j = 0; j < num_entities; j++)
3078             element_array[j] =
3079               getMappedElement(CONF_ELEMENTS_ELEMENT(buffer, j));
3080         }
3081         else if (data_type == TYPE_CONTENT_LIST)
3082         {
3083           struct Content *content= (struct Content *)(conf[i].value);
3084           int c, x, y;
3085
3086           for (c = 0; c < num_entities; c++)
3087             for (y = 0; y < 3; y++)
3088               for (x = 0; x < 3; x++)
3089                 content[c].e[x][y] =
3090                   getMappedElement(CONF_CONTENTS_ELEMENT(buffer, c, x, y));
3091         }
3092         else
3093           element_found = FALSE;
3094
3095         break;
3096       }
3097     }
3098
3099     checked_free(buffer);
3100
3101     micro_chunk_size += 2 + num_bytes;
3102   }
3103   else          // constant size configuration data (1, 2 or 4 bytes)
3104   {
3105     int value = (byte_mask == CONF_MASK_1_BYTE ? getFile8Bit   (file) :
3106                  byte_mask == CONF_MASK_2_BYTE ? getFile16BitBE(file) :
3107                  byte_mask == CONF_MASK_4_BYTE ? getFile32BitBE(file) : 0);
3108
3109     for (i = 0; conf[i].data_type != -1; i++)
3110     {
3111       if (conf[i].element == element &&
3112           conf[i].conf_type == conf_type)
3113       {
3114         int data_type = conf[i].data_type;
3115
3116         if (data_type == TYPE_ELEMENT)
3117           value = getMappedElement(value);
3118
3119         if (data_type == TYPE_BOOLEAN)
3120           *(boolean *)(conf[i].value) = value;
3121         else
3122           *(int *)    (conf[i].value) = value;
3123
3124         element_found = TRUE;
3125
3126         break;
3127       }
3128     }
3129
3130     micro_chunk_size += CONF_VALUE_NUM_BYTES(byte_mask);
3131   }
3132
3133   if (!element_found)
3134   {
3135     char *error_conf_chunk_bytes =
3136       (byte_mask == CONF_MASK_1_BYTE ? "CONF_VALUE_8_BIT" :
3137        byte_mask == CONF_MASK_2_BYTE ? "CONF_VALUE_16_BIT" :
3138        byte_mask == CONF_MASK_4_BYTE ? "CONF_VALUE_32_BIT" :"CONF_VALUE_BYTES");
3139     int error_conf_chunk_token = conf_type & CONF_MASK_TOKEN;
3140     int error_element = real_element;
3141
3142     Error(ERR_WARN, "cannot load micro chunk '%s(%d)' value for element %d ['%s']",
3143           error_conf_chunk_bytes, error_conf_chunk_token,
3144           error_element, EL_NAME(error_element));
3145   }
3146
3147   return micro_chunk_size;
3148 }
3149
3150 static int LoadLevel_INFO(File *file, int chunk_size, struct LevelInfo *level)
3151 {
3152   int real_chunk_size = 0;
3153
3154   li = *level;          // copy level data into temporary buffer
3155
3156   while (!checkEndOfFile(file))
3157   {
3158     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_INFO, -1, -1);
3159
3160     if (real_chunk_size >= chunk_size)
3161       break;
3162   }
3163
3164   *level = li;          // copy temporary buffer back to level data
3165
3166   return real_chunk_size;
3167 }
3168
3169 static int LoadLevel_CONF(File *file, int chunk_size, struct LevelInfo *level)
3170 {
3171   int real_chunk_size = 0;
3172
3173   li = *level;          // copy level data into temporary buffer
3174
3175   while (!checkEndOfFile(file))
3176   {
3177     int element = getMappedElement(getFile16BitBE(file));
3178
3179     real_chunk_size += 2;
3180     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_CONF,
3181                                             element, element);
3182     if (real_chunk_size >= chunk_size)
3183       break;
3184   }
3185
3186   *level = li;          // copy temporary buffer back to level data
3187
3188   return real_chunk_size;
3189 }
3190
3191 static int LoadLevel_ELEM(File *file, int chunk_size, struct LevelInfo *level)
3192 {
3193   int real_chunk_size = 0;
3194
3195   li = *level;          // copy level data into temporary buffer
3196
3197   while (!checkEndOfFile(file))
3198   {
3199     int element = getMappedElement(getFile16BitBE(file));
3200
3201     real_chunk_size += 2;
3202     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_ELEM,
3203                                             element, element);
3204     if (real_chunk_size >= chunk_size)
3205       break;
3206   }
3207
3208   *level = li;          // copy temporary buffer back to level data
3209
3210   return real_chunk_size;
3211 }
3212
3213 static int LoadLevel_NOTE(File *file, int chunk_size, struct LevelInfo *level)
3214 {
3215   int element = getMappedElement(getFile16BitBE(file));
3216   int envelope_nr = element - EL_ENVELOPE_1;
3217   int real_chunk_size = 2;
3218
3219   xx_envelope = level->envelope[envelope_nr];   // copy into temporary buffer
3220
3221   while (!checkEndOfFile(file))
3222   {
3223     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_NOTE,
3224                                             -1, element);
3225
3226     if (real_chunk_size >= chunk_size)
3227       break;
3228   }
3229
3230   level->envelope[envelope_nr] = xx_envelope;   // copy from temporary buffer
3231
3232   return real_chunk_size;
3233 }
3234
3235 static int LoadLevel_CUSX(File *file, int chunk_size, struct LevelInfo *level)
3236 {
3237   int element = getMappedElement(getFile16BitBE(file));
3238   int real_chunk_size = 2;
3239   struct ElementInfo *ei = &element_info[element];
3240   int i;
3241
3242   xx_ei = *ei;          // copy element data into temporary buffer
3243
3244   xx_ei.num_change_pages = -1;
3245
3246   while (!checkEndOfFile(file))
3247   {
3248     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_CUSX_base,
3249                                             -1, element);
3250     if (xx_ei.num_change_pages != -1)
3251       break;
3252
3253     if (real_chunk_size >= chunk_size)
3254       break;
3255   }
3256
3257   *ei = xx_ei;
3258
3259   if (ei->num_change_pages == -1)
3260   {
3261     Error(ERR_WARN, "LoadLevel_CUSX(): missing 'num_change_pages' for '%s'",
3262           EL_NAME(element));
3263
3264     ei->num_change_pages = 1;
3265
3266     setElementChangePages(ei, 1);
3267     setElementChangeInfoToDefaults(ei->change);
3268
3269     return real_chunk_size;
3270   }
3271
3272   // initialize number of change pages stored for this custom element
3273   setElementChangePages(ei, ei->num_change_pages);
3274   for (i = 0; i < ei->num_change_pages; i++)
3275     setElementChangeInfoToDefaults(&ei->change_page[i]);
3276
3277   // start with reading properties for the first change page
3278   xx_current_change_page = 0;
3279
3280   while (!checkEndOfFile(file))
3281   {
3282     struct ElementChangeInfo *change = &ei->change_page[xx_current_change_page];
3283
3284     xx_change = *change;        // copy change data into temporary buffer
3285
3286     resetEventBits();           // reset bits; change page might have changed
3287
3288     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_CUSX_change,
3289                                             -1, element);
3290
3291     *change = xx_change;
3292
3293     setEventFlagsFromEventBits(change);
3294
3295     if (real_chunk_size >= chunk_size)
3296       break;
3297   }
3298
3299   level->file_has_custom_elements = TRUE;
3300
3301   return real_chunk_size;
3302 }
3303
3304 static int LoadLevel_GRPX(File *file, int chunk_size, struct LevelInfo *level)
3305 {
3306   int element = getMappedElement(getFile16BitBE(file));
3307   int real_chunk_size = 2;
3308   struct ElementInfo *ei = &element_info[element];
3309   struct ElementGroupInfo *group = ei->group;
3310
3311   xx_ei = *ei;          // copy element data into temporary buffer
3312   xx_group = *group;    // copy group data into temporary buffer
3313
3314   while (!checkEndOfFile(file))
3315   {
3316     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_GRPX,
3317                                             -1, element);
3318
3319     if (real_chunk_size >= chunk_size)
3320       break;
3321   }
3322
3323   *ei = xx_ei;
3324   *group = xx_group;
3325
3326   level->file_has_custom_elements = TRUE;
3327
3328   return real_chunk_size;
3329 }
3330
3331 static void LoadLevelFromFileInfo_RND(struct LevelInfo *level,
3332                                       struct LevelFileInfo *level_file_info,
3333                                       boolean level_info_only)
3334 {
3335   char *filename = level_file_info->filename;
3336   char cookie[MAX_LINE_LEN];
3337   char chunk_name[CHUNK_ID_LEN + 1];
3338   int chunk_size;
3339   File *file;
3340
3341   if (!(file = openFile(filename, MODE_READ)))
3342   {
3343     level->no_valid_file = TRUE;
3344     level->no_level_file = TRUE;
3345
3346     if (level_info_only)
3347       return;
3348
3349     Error(ERR_WARN, "cannot read level '%s' -- using empty level", filename);
3350
3351     if (!setup.editor.use_template_for_new_levels)
3352       return;
3353
3354     // if level file not found, try to initialize level data from template
3355     filename = getGlobalLevelTemplateFilename();
3356
3357     if (!(file = openFile(filename, MODE_READ)))
3358       return;
3359
3360     // default: for empty levels, use level template for custom elements
3361     level->use_custom_template = TRUE;
3362
3363     level->no_valid_file = FALSE;
3364   }
3365
3366   getFileChunkBE(file, chunk_name, NULL);
3367   if (strEqual(chunk_name, "RND1"))
3368   {
3369     getFile32BitBE(file);               // not used
3370
3371     getFileChunkBE(file, chunk_name, NULL);
3372     if (!strEqual(chunk_name, "CAVE"))
3373     {
3374       level->no_valid_file = TRUE;
3375
3376       Error(ERR_WARN, "unknown format of level file '%s'", filename);
3377
3378       closeFile(file);
3379
3380       return;
3381     }
3382   }
3383   else  // check for pre-2.0 file format with cookie string
3384   {
3385     strcpy(cookie, chunk_name);
3386     if (getStringFromFile(file, &cookie[4], MAX_LINE_LEN - 4) == NULL)
3387       cookie[4] = '\0';
3388     if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
3389       cookie[strlen(cookie) - 1] = '\0';
3390
3391     if (!checkCookieString(cookie, LEVEL_COOKIE_TMPL))
3392     {
3393       level->no_valid_file = TRUE;
3394
3395       Error(ERR_WARN, "unknown format of level file '%s'", filename);
3396
3397       closeFile(file);
3398
3399       return;
3400     }
3401
3402     if ((level->file_version = getFileVersionFromCookieString(cookie)) == -1)
3403     {
3404       level->no_valid_file = TRUE;
3405
3406       Error(ERR_WARN, "unsupported version of level file '%s'", filename);
3407
3408       closeFile(file);
3409
3410       return;
3411     }
3412
3413     // pre-2.0 level files have no game version, so use file version here
3414     level->game_version = level->file_version;
3415   }
3416
3417   if (level->file_version < FILE_VERSION_1_2)
3418   {
3419     // level files from versions before 1.2.0 without chunk structure
3420     LoadLevel_HEAD(file, LEVEL_CHUNK_HEAD_SIZE,         level);
3421     LoadLevel_BODY(file, level->fieldx * level->fieldy, level);
3422   }
3423   else
3424   {
3425     static struct
3426     {
3427       char *name;
3428       int size;
3429       int (*loader)(File *, int, struct LevelInfo *);
3430     }
3431     chunk_info[] =
3432     {
3433       { "VERS", LEVEL_CHUNK_VERS_SIZE,  LoadLevel_VERS },
3434       { "DATE", LEVEL_CHUNK_DATE_SIZE,  LoadLevel_DATE },
3435       { "HEAD", LEVEL_CHUNK_HEAD_SIZE,  LoadLevel_HEAD },
3436       { "NAME", LEVEL_CHUNK_NAME_SIZE,  LoadLevel_NAME },
3437       { "AUTH", LEVEL_CHUNK_AUTH_SIZE,  LoadLevel_AUTH },
3438       { "INFO", -1,                     LoadLevel_INFO },
3439       { "BODY", -1,                     LoadLevel_BODY },
3440       { "CONT", -1,                     LoadLevel_CONT },
3441       { "CNT2", LEVEL_CHUNK_CNT2_SIZE,  LoadLevel_CNT2 },
3442       { "CNT3", -1,                     LoadLevel_CNT3 },
3443       { "CUS1", -1,                     LoadLevel_CUS1 },
3444       { "CUS2", -1,                     LoadLevel_CUS2 },
3445       { "CUS3", -1,                     LoadLevel_CUS3 },
3446       { "CUS4", -1,                     LoadLevel_CUS4 },
3447       { "GRP1", -1,                     LoadLevel_GRP1 },
3448       { "CONF", -1,                     LoadLevel_CONF },
3449       { "ELEM", -1,                     LoadLevel_ELEM },
3450       { "NOTE", -1,                     LoadLevel_NOTE },
3451       { "CUSX", -1,                     LoadLevel_CUSX },
3452       { "GRPX", -1,                     LoadLevel_GRPX },
3453
3454       {  NULL,  0,                      NULL }
3455     };
3456
3457     while (getFileChunkBE(file, chunk_name, &chunk_size))
3458     {
3459       int i = 0;
3460
3461       while (chunk_info[i].name != NULL &&
3462              !strEqual(chunk_name, chunk_info[i].name))
3463         i++;
3464
3465       if (chunk_info[i].name == NULL)
3466       {
3467         Error(ERR_WARN, "unknown chunk '%s' in level file '%s'",
3468               chunk_name, filename);
3469         ReadUnusedBytesFromFile(file, chunk_size);
3470       }
3471       else if (chunk_info[i].size != -1 &&
3472                chunk_info[i].size != chunk_size)
3473       {
3474         Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
3475               chunk_size, chunk_name, filename);
3476         ReadUnusedBytesFromFile(file, chunk_size);
3477       }
3478       else
3479       {
3480         // call function to load this level chunk
3481         int chunk_size_expected =
3482           (chunk_info[i].loader)(file, chunk_size, level);
3483
3484         // the size of some chunks cannot be checked before reading other
3485         // chunks first (like "HEAD" and "BODY") that contain some header
3486         // information, so check them here
3487         if (chunk_size_expected != chunk_size)
3488         {
3489           Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
3490                 chunk_size, chunk_name, filename);
3491         }
3492       }
3493     }
3494   }
3495
3496   closeFile(file);
3497 }
3498
3499
3500 // ----------------------------------------------------------------------------
3501 // functions for loading EM level
3502 // ----------------------------------------------------------------------------
3503
3504 static void CopyNativeLevel_RND_to_EM(struct LevelInfo *level)
3505 {
3506   static int ball_xy[8][2] =
3507   {
3508     { 0, 0 },
3509     { 1, 0 },
3510     { 2, 0 },
3511     { 0, 1 },
3512     { 2, 1 },
3513     { 0, 2 },
3514     { 1, 2 },
3515     { 2, 2 },
3516   };
3517   struct LevelInfo_EM *level_em = level->native_em_level;
3518   struct LEVEL *lev = level_em->lev;
3519   struct PLAYER **ply = level_em->ply;
3520   int i, j, x, y;
3521
3522   lev->width  = MIN(level->fieldx, EM_MAX_CAVE_WIDTH);
3523   lev->height = MIN(level->fieldy, EM_MAX_CAVE_HEIGHT);
3524
3525   lev->time_seconds     = level->time;
3526   lev->required_initial = level->gems_needed;
3527
3528   lev->emerald_score    = level->score[SC_EMERALD];
3529   lev->diamond_score    = level->score[SC_DIAMOND];
3530   lev->alien_score      = level->score[SC_ROBOT];
3531   lev->tank_score       = level->score[SC_SPACESHIP];
3532   lev->bug_score        = level->score[SC_BUG];
3533   lev->eater_score      = level->score[SC_YAMYAM];
3534   lev->nut_score        = level->score[SC_NUT];
3535   lev->dynamite_score   = level->score[SC_DYNAMITE];
3536   lev->key_score        = level->score[SC_KEY];
3537   lev->exit_score       = level->score[SC_TIME_BONUS];
3538
3539   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
3540     for (y = 0; y < 3; y++)
3541       for (x = 0; x < 3; x++)
3542         lev->eater_array[i][y * 3 + x] =
3543           map_element_RND_to_EM(level->yamyam_content[i].e[x][y]);
3544
3545   lev->amoeba_time              = level->amoeba_speed;
3546   lev->wonderwall_time_initial  = level->time_magic_wall;
3547   lev->wheel_time               = level->time_wheel;
3548
3549   lev->android_move_time        = level->android_move_time;
3550   lev->android_clone_time       = level->android_clone_time;
3551   lev->ball_random              = level->ball_random;
3552   lev->ball_state_initial       = level->ball_state_initial;
3553   lev->ball_time                = level->ball_time;
3554   lev->num_ball_arrays          = level->num_ball_contents;
3555
3556   lev->lenses_score             = level->lenses_score;
3557   lev->magnify_score            = level->magnify_score;
3558   lev->slurp_score              = level->slurp_score;
3559
3560   lev->lenses_time              = level->lenses_time;
3561   lev->magnify_time             = level->magnify_time;
3562
3563   lev->wind_direction_initial =
3564     map_direction_RND_to_EM(level->wind_direction_initial);
3565   lev->wind_cnt_initial = (level->wind_direction_initial != MV_NONE ?
3566                            lev->wind_time : 0);
3567
3568   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
3569     for (j = 0; j < 8; j++)
3570       lev->ball_array[i][j] =
3571         map_element_RND_to_EM(level->
3572                               ball_content[i].e[ball_xy[j][0]][ball_xy[j][1]]);
3573
3574   map_android_clone_elements_RND_to_EM(level);
3575
3576   // first fill the complete playfield with the default border element
3577   for (y = 0; y < EM_MAX_CAVE_HEIGHT; y++)
3578     for (x = 0; x < EM_MAX_CAVE_WIDTH; x++)
3579       level_em->cave[x][y] = ZBORDER;
3580
3581   if (BorderElement == EL_STEELWALL)
3582   {
3583     for (y = 0; y < lev->height + 2; y++)
3584       for (x = 0; x < lev->width + 2; x++)
3585         level_em->cave[x + 1][y + 1] = map_element_RND_to_EM(EL_STEELWALL);
3586   }
3587
3588   // then copy the real level contents from level file into the playfield
3589   for (y = 0; y < lev->height; y++) for (x = 0; x < lev->width; x++)
3590   {
3591     int new_element = map_element_RND_to_EM(level->field[x][y]);
3592     int offset = (BorderElement == EL_STEELWALL ? 1 : 0);
3593     int xx = x + 1 + offset;
3594     int yy = y + 1 + offset;
3595
3596     if (level->field[x][y] == EL_AMOEBA_DEAD)
3597       new_element = map_element_RND_to_EM(EL_AMOEBA_WET);
3598
3599     level_em->cave[xx][yy] = new_element;
3600   }
3601
3602   for (i = 0; i < MAX_PLAYERS; i++)
3603   {
3604     ply[i]->x_initial = 0;
3605     ply[i]->y_initial = 0;
3606   }
3607
3608   // initialize player positions and delete players from the playfield
3609   for (y = 0; y < lev->height; y++) for (x = 0; x < lev->width; x++)
3610   {
3611     if (ELEM_IS_PLAYER(level->field[x][y]))
3612     {
3613       int player_nr = GET_PLAYER_NR(level->field[x][y]);
3614       int offset = (BorderElement == EL_STEELWALL ? 1 : 0);
3615       int xx = x + 1 + offset;
3616       int yy = y + 1 + offset;
3617
3618       ply[player_nr]->x_initial = xx;
3619       ply[player_nr]->y_initial = yy;
3620
3621       level_em->cave[xx][yy] = map_element_RND_to_EM(EL_EMPTY);
3622     }
3623   }
3624
3625   if (BorderElement == EL_STEELWALL)
3626   {
3627     lev->width  += 2;
3628     lev->height += 2;
3629   }
3630 }
3631
3632 static void CopyNativeLevel_EM_to_RND(struct LevelInfo *level)
3633 {
3634   static int ball_xy[8][2] =
3635   {
3636     { 0, 0 },
3637     { 1, 0 },
3638     { 2, 0 },
3639     { 0, 1 },
3640     { 2, 1 },
3641     { 0, 2 },
3642     { 1, 2 },
3643     { 2, 2 },
3644   };
3645   struct LevelInfo_EM *level_em = level->native_em_level;
3646   struct LEVEL *lev = level_em->lev;
3647   struct PLAYER **ply = level_em->ply;
3648   int i, j, x, y;
3649
3650   level->fieldx = MIN(lev->width,  MAX_LEV_FIELDX);
3651   level->fieldy = MIN(lev->height, MAX_LEV_FIELDY);
3652
3653   level->time        = lev->time_seconds;
3654   level->gems_needed = lev->required_initial;
3655
3656   sprintf(level->name, "Level %d", level->file_info.nr);
3657
3658   level->score[SC_EMERALD]      = lev->emerald_score;
3659   level->score[SC_DIAMOND]      = lev->diamond_score;
3660   level->score[SC_ROBOT]        = lev->alien_score;
3661   level->score[SC_SPACESHIP]    = lev->tank_score;
3662   level->score[SC_BUG]          = lev->bug_score;
3663   level->score[SC_YAMYAM]       = lev->eater_score;
3664   level->score[SC_NUT]          = lev->nut_score;
3665   level->score[SC_DYNAMITE]     = lev->dynamite_score;
3666   level->score[SC_KEY]          = lev->key_score;
3667   level->score[SC_TIME_BONUS]   = lev->exit_score;
3668
3669   level->num_yamyam_contents = MAX_ELEMENT_CONTENTS;
3670
3671   for (i = 0; i < level->num_yamyam_contents; i++)
3672     for (y = 0; y < 3; y++)
3673       for (x = 0; x < 3; x++)
3674         level->yamyam_content[i].e[x][y] =
3675           map_element_EM_to_RND(lev->eater_array[i][y * 3 + x]);
3676
3677   level->amoeba_speed           = lev->amoeba_time;
3678   level->time_magic_wall        = lev->wonderwall_time_initial;
3679   level->time_wheel             = lev->wheel_time;
3680
3681   level->android_move_time      = lev->android_move_time;
3682   level->android_clone_time     = lev->android_clone_time;
3683   level->ball_random            = lev->ball_random;
3684   level->ball_state_initial     = lev->ball_state_initial;
3685   level->ball_time              = lev->ball_time;
3686   level->num_ball_contents      = lev->num_ball_arrays;
3687
3688   level->lenses_score           = lev->lenses_score;
3689   level->magnify_score          = lev->magnify_score;
3690   level->slurp_score            = lev->slurp_score;
3691
3692   level->lenses_time            = lev->lenses_time;
3693   level->magnify_time           = lev->magnify_time;
3694
3695   level->wind_direction_initial =
3696     map_direction_EM_to_RND(lev->wind_direction_initial);
3697
3698   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
3699     for (j = 0; j < 8; j++)
3700       level->ball_content[i].e[ball_xy[j][0]][ball_xy[j][1]] =
3701         map_element_EM_to_RND(lev->ball_array[i][j]);
3702
3703   map_android_clone_elements_EM_to_RND(level);
3704
3705   // convert the playfield (some elements need special treatment)
3706   for (y = 0; y < level->fieldy; y++) for (x = 0; x < level->fieldx; x++)
3707   {
3708     int new_element = map_element_EM_to_RND(level_em->cave[x + 1][y + 1]);
3709
3710     if (new_element == EL_AMOEBA_WET && level->amoeba_speed == 0)
3711       new_element = EL_AMOEBA_DEAD;
3712
3713     level->field[x][y] = new_element;
3714   }
3715
3716   for (i = 0; i < MAX_PLAYERS; i++)
3717   {
3718     // in case of all players set to the same field, use the first player
3719     int nr = MAX_PLAYERS - i - 1;
3720     int jx = ply[nr]->x_initial - 1;
3721     int jy = ply[nr]->y_initial - 1;
3722
3723     if (jx != -1 && jy != -1)
3724       level->field[jx][jy] = EL_PLAYER_1 + nr;
3725   }
3726 }
3727
3728
3729 // ----------------------------------------------------------------------------
3730 // functions for loading SP level