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_MM_MCDUFFIN,                     -1,
 823     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
 824     &li.mm_laser_red,                   FALSE
 825   },
 826   {
 827     EL_MM_MCDUFFIN,                     -1,
 828     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
 829     &li.mm_laser_green,                 FALSE
 830   },
 831   {
 832     EL_MM_MCDUFFIN,                     -1,
 833     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
 834     &li.mm_laser_blue,                  TRUE
 835   },
 836
 837   {
 838     EL_DF_LASER,                        -1,
 839     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
 840     &li.df_laser_red,                   TRUE
 841   },
 842   {
 843     EL_DF_LASER,                        -1,
 844     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
 845     &li.df_laser_green,                 TRUE
 846   },
 847   {
 848     EL_DF_LASER,                        -1,
 849     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
 850     &li.df_laser_blue,                  FALSE
 851   },
 852
 853   {
 854     EL_MM_FUSE_ACTIVE,                  -1,
 855     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
 856     &li.mm_time_fuse,                   25
 857   },
 858   {
 859     EL_MM_BOMB,                         -1,
 860     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
 861     &li.mm_time_bomb,                   75
 862   },
 863   {
 864     EL_MM_GRAY_BALL,                    -1,
 865     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
 866     &li.mm_time_ball,                   75
 867   },
 868   {
 869     EL_MM_STEEL_BLOCK,                  -1,
 870     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
 871     &li.mm_time_block,                  75
 872   },
 873   {
 874     EL_MM_LIGHTBALL,                    -1,
 875     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
 876     &li.score[SC_ELEM_BONUS],           10
 877   },
 878
 879   // ---------- unused values -------------------------------------------------
 880
 881   {
 882     EL_UNKNOWN,                         SAVE_CONF_NEVER,
 883     TYPE_INTEGER,                       CONF_VALUE_16_BIT(1),
 884     &li.score[SC_UNKNOWN_15],           10
 885   },
 886
 887   {
 888     -1,                                 -1,
 889     -1,                                 -1,
 890     NULL,                               -1
 891   }
 892 };
 893
 894 static struct LevelFileConfigInfo chunk_config_NOTE[] =
 895 {
 896   {
 897     -1,                                 -1,
 898     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
 899     &xx_envelope.xsize,                 MAX_ENVELOPE_XSIZE,
 900   },
 901   {
 902     -1,                                 -1,
 903     TYPE_INTEGER,                       CONF_VALUE_8_BIT(2),
 904     &xx_envelope.ysize,                 MAX_ENVELOPE_YSIZE,
 905   },
 906
 907   {
 908     -1,                                 -1,
 909     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
 910     &xx_envelope.autowrap,              FALSE
 911   },
 912   {
 913     -1,                                 -1,
 914     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(4),
 915     &xx_envelope.centered,              FALSE
 916   },
 917
 918   {
 919     -1,                                 -1,
 920     TYPE_STRING,                        CONF_VALUE_BYTES(1),
 921     &xx_envelope.text,                  -1, NULL,
 922     &xx_string_length_unused,           -1, MAX_ENVELOPE_TEXT_LEN,
 923     &xx_default_string_empty[0]
 924   },
 925
 926   {
 927     -1,                                 -1,
 928     -1,                                 -1,
 929     NULL,                               -1
 930   }
 931 };
 932
 933 static struct LevelFileConfigInfo chunk_config_CUSX_base[] =
 934 {
 935   {
 936     -1,                                 -1,
 937     TYPE_STRING,                        CONF_VALUE_BYTES(1),
 938     &xx_ei.description[0],              -1,
 939     &yy_ei.description[0],
 940     &xx_string_length_unused,           -1, MAX_ELEMENT_NAME_LEN,
 941     &xx_default_description[0]
 942   },
 943
 944   {
 945     -1,                                 -1,
 946     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(1),
 947     &xx_ei.properties[EP_BITFIELD_BASE_NR], EP_BITMASK_BASE_DEFAULT,
 948     &yy_ei.properties[EP_BITFIELD_BASE_NR]
 949   },
 950 #if ENABLE_RESERVED_CODE
 951   // (reserved for later use)
 952   {
 953     -1,                                 -1,
 954     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(2),
 955     &xx_ei.properties[EP_BITFIELD_BASE_NR + 1], EP_BITMASK_DEFAULT,
 956     &yy_ei.properties[EP_BITFIELD_BASE_NR + 1]
 957   },
 958 #endif
 959
 960   {
 961     -1,                                 -1,
 962     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
 963     &xx_ei.use_gfx_element,             FALSE,
 964     &yy_ei.use_gfx_element
 965   },
 966   {
 967     -1,                                 -1,
 968     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
 969     &xx_ei.gfx_element_initial,         EL_EMPTY_SPACE,
 970     &yy_ei.gfx_element_initial
 971   },
 972
 973   {
 974     -1,                                 -1,
 975     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(2),
 976     &xx_ei.access_direction,            MV_ALL_DIRECTIONS,
 977     &yy_ei.access_direction
 978   },
 979
 980   {
 981     -1,                                 -1,
 982     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
 983     &xx_ei.collect_score_initial,       10,
 984     &yy_ei.collect_score_initial
 985   },
 986   {
 987     -1,                                 -1,
 988     TYPE_INTEGER,                       CONF_VALUE_16_BIT(3),
 989     &xx_ei.collect_count_initial,       1,
 990     &yy_ei.collect_count_initial
 991   },
 992
 993   {
 994     -1,                                 -1,
 995     TYPE_INTEGER,                       CONF_VALUE_16_BIT(4),
 996     &xx_ei.ce_value_fixed_initial,      0,
 997     &yy_ei.ce_value_fixed_initial
 998   },
 999   {
1000     -1,                                 -1,
1001     TYPE_INTEGER,                       CONF_VALUE_16_BIT(5),
1002     &xx_ei.ce_value_random_initial,     0,
1003     &yy_ei.ce_value_random_initial
1004   },
1005   {
1006     -1,                                 -1,
1007     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(3),
1008     &xx_ei.use_last_ce_value,           FALSE,
1009     &yy_ei.use_last_ce_value
1010   },
1011
1012   {
1013     -1,                                 -1,
1014     TYPE_INTEGER,                       CONF_VALUE_16_BIT(6),
1015     &xx_ei.push_delay_fixed,            8,
1016     &yy_ei.push_delay_fixed
1017   },
1018   {
1019     -1,                                 -1,
1020     TYPE_INTEGER,                       CONF_VALUE_16_BIT(7),
1021     &xx_ei.push_delay_random,           8,
1022     &yy_ei.push_delay_random
1023   },
1024   {
1025     -1,                                 -1,
1026     TYPE_INTEGER,                       CONF_VALUE_16_BIT(8),
1027     &xx_ei.drop_delay_fixed,            0,
1028     &yy_ei.drop_delay_fixed
1029   },
1030   {
1031     -1,                                 -1,
1032     TYPE_INTEGER,                       CONF_VALUE_16_BIT(9),
1033     &xx_ei.drop_delay_random,           0,
1034     &yy_ei.drop_delay_random
1035   },
1036   {
1037     -1,                                 -1,
1038     TYPE_INTEGER,                       CONF_VALUE_16_BIT(10),
1039     &xx_ei.move_delay_fixed,            0,
1040     &yy_ei.move_delay_fixed
1041   },
1042   {
1043     -1,                                 -1,
1044     TYPE_INTEGER,                       CONF_VALUE_16_BIT(11),
1045     &xx_ei.move_delay_random,           0,
1046     &yy_ei.move_delay_random
1047   },
1048
1049   {
1050     -1,                                 -1,
1051     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(3),
1052     &xx_ei.move_pattern,                MV_ALL_DIRECTIONS,
1053     &yy_ei.move_pattern
1054   },
1055   {
1056     -1,                                 -1,
1057     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(4),
1058     &xx_ei.move_direction_initial,      MV_START_AUTOMATIC,
1059     &yy_ei.move_direction_initial
1060   },
1061   {
1062     -1,                                 -1,
1063     TYPE_INTEGER,                       CONF_VALUE_8_BIT(5),
1064     &xx_ei.move_stepsize,               TILEX / 8,
1065     &yy_ei.move_stepsize
1066   },
1067
1068   {
1069     -1,                                 -1,
1070     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(12),
1071     &xx_ei.move_enter_element,          EL_EMPTY_SPACE,
1072     &yy_ei.move_enter_element
1073   },
1074   {
1075     -1,                                 -1,
1076     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(13),
1077     &xx_ei.move_leave_element,          EL_EMPTY_SPACE,
1078     &yy_ei.move_leave_element
1079   },
1080   {
1081     -1,                                 -1,
1082     TYPE_INTEGER,                       CONF_VALUE_8_BIT(6),
1083     &xx_ei.move_leave_type,             LEAVE_TYPE_UNLIMITED,
1084     &yy_ei.move_leave_type
1085   },
1086
1087   {
1088     -1,                                 -1,
1089     TYPE_INTEGER,                       CONF_VALUE_8_BIT(7),
1090     &xx_ei.slippery_type,               SLIPPERY_ANY_RANDOM,
1091     &yy_ei.slippery_type
1092   },
1093
1094   {
1095     -1,                                 -1,
1096     TYPE_INTEGER,                       CONF_VALUE_8_BIT(8),
1097     &xx_ei.explosion_type,              EXPLODES_3X3,
1098     &yy_ei.explosion_type
1099   },
1100   {
1101     -1,                                 -1,
1102     TYPE_INTEGER,                       CONF_VALUE_16_BIT(14),
1103     &xx_ei.explosion_delay,             16,
1104     &yy_ei.explosion_delay
1105   },
1106   {
1107     -1,                                 -1,
1108     TYPE_INTEGER,                       CONF_VALUE_16_BIT(15),
1109     &xx_ei.ignition_delay,              8,
1110     &yy_ei.ignition_delay
1111   },
1112
1113   {
1114     -1,                                 -1,
1115     TYPE_CONTENT_LIST,                  CONF_VALUE_BYTES(2),
1116     &xx_ei.content,                     EL_EMPTY_SPACE,
1117     &yy_ei.content,
1118     &xx_num_contents,                   1, 1
1119   },
1120
1121   // ---------- "num_change_pages" must be the last entry ---------------------
1122
1123   {
1124     -1,                                 SAVE_CONF_ALWAYS,
1125     TYPE_INTEGER,                       CONF_VALUE_8_BIT(9),
1126     &xx_ei.num_change_pages,            1,
1127     &yy_ei.num_change_pages
1128   },
1129
1130   {
1131     -1,                                 -1,
1132     -1,                                 -1,
1133     NULL,                               -1,
1134     NULL
1135   }
1136 };
1137
1138 static struct LevelFileConfigInfo chunk_config_CUSX_change[] =
1139 {
1140   // ---------- "current_change_page" must be the first entry -----------------
1141
1142   {
1143     -1,                                 SAVE_CONF_ALWAYS,
1144     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
1145     &xx_current_change_page,            -1
1146   },
1147
1148   // ---------- (the remaining entries can be in any order) -------------------
1149
1150   {
1151     -1,                                 -1,
1152     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(2),
1153     &xx_change.can_change,              FALSE
1154   },
1155
1156   {
1157     -1,                                 -1,
1158     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(1),
1159     &xx_event_bits[0],                  0
1160   },
1161   {
1162     -1,                                 -1,
1163     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(2),
1164     &xx_event_bits[1],                  0
1165   },
1166
1167   {
1168     -1,                                 -1,
1169     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(3),
1170     &xx_change.trigger_player,          CH_PLAYER_ANY
1171   },
1172   {
1173     -1,                                 -1,
1174     TYPE_BITFIELD,                      CONF_VALUE_8_BIT(4),
1175     &xx_change.trigger_side,            CH_SIDE_ANY
1176   },
1177   {
1178     -1,                                 -1,
1179     TYPE_BITFIELD,                      CONF_VALUE_32_BIT(3),
1180     &xx_change.trigger_page,            CH_PAGE_ANY
1181   },
1182
1183   {
1184     -1,                                 -1,
1185     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
1186     &xx_change.target_element,          EL_EMPTY_SPACE
1187   },
1188
1189   {
1190     -1,                                 -1,
1191     TYPE_INTEGER,                       CONF_VALUE_16_BIT(2),
1192     &xx_change.delay_fixed,             0
1193   },
1194   {
1195     -1,                                 -1,
1196     TYPE_INTEGER,                       CONF_VALUE_16_BIT(3),
1197     &xx_change.delay_random,            0
1198   },
1199   {
1200     -1,                                 -1,
1201     TYPE_INTEGER,                       CONF_VALUE_16_BIT(4),
1202     &xx_change.delay_frames,            FRAMES_PER_SECOND
1203   },
1204
1205   {
1206     -1,                                 -1,
1207     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(5),
1208     &xx_change.initial_trigger_element, EL_EMPTY_SPACE
1209   },
1210
1211   {
1212     -1,                                 -1,
1213     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(6),
1214     &xx_change.explode,                 FALSE
1215   },
1216   {
1217     -1,                                 -1,
1218     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(7),
1219     &xx_change.use_target_content,      FALSE
1220   },
1221   {
1222     -1,                                 -1,
1223     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(8),
1224     &xx_change.only_if_complete,        FALSE
1225   },
1226   {
1227     -1,                                 -1,
1228     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
1229     &xx_change.use_random_replace,      FALSE
1230   },
1231   {
1232     -1,                                 -1,
1233     TYPE_INTEGER,                       CONF_VALUE_8_BIT(10),
1234     &xx_change.random_percentage,       100
1235   },
1236   {
1237     -1,                                 -1,
1238     TYPE_INTEGER,                       CONF_VALUE_8_BIT(11),
1239     &xx_change.replace_when,            CP_WHEN_EMPTY
1240   },
1241
1242   {
1243     -1,                                 -1,
1244     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(12),
1245     &xx_change.has_action,              FALSE
1246   },
1247   {
1248     -1,                                 -1,
1249     TYPE_INTEGER,                       CONF_VALUE_8_BIT(13),
1250     &xx_change.action_type,             CA_NO_ACTION
1251   },
1252   {
1253     -1,                                 -1,
1254     TYPE_INTEGER,                       CONF_VALUE_8_BIT(14),
1255     &xx_change.action_mode,             CA_MODE_UNDEFINED
1256   },
1257   {
1258     -1,                                 -1,
1259     TYPE_INTEGER,                       CONF_VALUE_16_BIT(6),
1260     &xx_change.action_arg,              CA_ARG_UNDEFINED
1261   },
1262
1263   {
1264     -1,                                 -1,
1265     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(7),
1266     &xx_change.action_element,          EL_EMPTY_SPACE
1267   },
1268
1269   {
1270     -1,                                 -1,
1271     TYPE_CONTENT_LIST,                  CONF_VALUE_BYTES(1),
1272     &xx_change.target_content,          EL_EMPTY_SPACE, NULL,
1273     &xx_num_contents,                   1, 1
1274   },
1275
1276   {
1277     -1,                                 -1,
1278     -1,                                 -1,
1279     NULL,                               -1
1280   }
1281 };
1282
1283 static struct LevelFileConfigInfo chunk_config_GRPX[] =
1284 {
1285   {
1286     -1,                                 -1,
1287     TYPE_STRING,                        CONF_VALUE_BYTES(1),
1288     &xx_ei.description[0],              -1, NULL,
1289     &xx_string_length_unused,           -1, MAX_ELEMENT_NAME_LEN,
1290     &xx_default_description[0]
1291   },
1292
1293   {
1294     -1,                                 -1,
1295     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(1),
1296     &xx_ei.use_gfx_element,             FALSE
1297   },
1298   {
1299     -1,                                 -1,
1300     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
1301     &xx_ei.gfx_element_initial,         EL_EMPTY_SPACE
1302   },
1303
1304   {
1305     -1,                                 -1,
1306     TYPE_INTEGER,                       CONF_VALUE_8_BIT(2),
1307     &xx_group.choice_mode,              ANIM_RANDOM
1308   },
1309
1310   {
1311     -1,                                 -1,
1312     TYPE_ELEMENT_LIST,                  CONF_VALUE_BYTES(2),
1313     &xx_group.element[0],               EL_EMPTY_SPACE, NULL,
1314     &xx_group.num_elements,             1, MAX_ELEMENTS_IN_GROUP
1315   },
1316
1317   {
1318     -1,                                 -1,
1319     -1,                                 -1,
1320     NULL,                               -1
1321   }
1322 };
1323
1324 static struct LevelFileConfigInfo chunk_config_CONF[] =         // (OBSOLETE)
1325 {
1326   {
1327     EL_PLAYER_1,                        -1,
1328     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(9),
1329     &li.block_snap_field,               TRUE
1330   },
1331   {
1332     EL_PLAYER_1,                        -1,
1333     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(13),
1334     &li.continuous_snapping,            TRUE
1335   },
1336   {
1337     EL_PLAYER_1,                        -1,
1338     TYPE_INTEGER,                       CONF_VALUE_8_BIT(1),
1339     &li.initial_player_stepsize[0],     STEPSIZE_NORMAL
1340   },
1341   {
1342     EL_PLAYER_1,                        -1,
1343     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(10),
1344     &li.use_start_element[0],           FALSE
1345   },
1346   {
1347     EL_PLAYER_1,                        -1,
1348     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(1),
1349     &li.start_element[0],               EL_PLAYER_1
1350   },
1351   {
1352     EL_PLAYER_1,                        -1,
1353     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(11),
1354     &li.use_artwork_element[0],         FALSE
1355   },
1356   {
1357     EL_PLAYER_1,                        -1,
1358     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(2),
1359     &li.artwork_element[0],             EL_PLAYER_1
1360   },
1361   {
1362     EL_PLAYER_1,                        -1,
1363     TYPE_BOOLEAN,                       CONF_VALUE_8_BIT(12),
1364     &li.use_explosion_element[0],       FALSE
1365   },
1366   {
1367     EL_PLAYER_1,                        -1,
1368     TYPE_ELEMENT,                       CONF_VALUE_16_BIT(3),
1369     &li.explosion_element[0],           EL_PLAYER_1
1370   },
1371
1372   {
1373     -1,                                 -1,
1374     -1,                                 -1,
1375     NULL,                               -1
1376   }
1377 };
1378
1379 static struct
1380 {
1381   int filetype;
1382   char *id;
1383 }
1384 filetype_id_list[] =
1385 {
1386   { LEVEL_FILE_TYPE_RND,        "RND"   },
1387   { LEVEL_FILE_TYPE_BD,         "BD"    },
1388   { LEVEL_FILE_TYPE_EM,         "EM"    },
1389   { LEVEL_FILE_TYPE_SP,         "SP"    },
1390   { LEVEL_FILE_TYPE_DX,         "DX"    },
1391   { LEVEL_FILE_TYPE_SB,         "SB"    },
1392   { LEVEL_FILE_TYPE_DC,         "DC"    },
1393   { LEVEL_FILE_TYPE_MM,         "MM"    },
1394   { LEVEL_FILE_TYPE_MM,         "DF"    },
1395   { -1,                         NULL    },
1396 };
1397
1398
1399 // ============================================================================
1400 // level file functions
1401 // ============================================================================
1402
1403 static boolean check_special_flags(char *flag)
1404 {
1405   if (strEqual(options.special_flags, flag) ||
1406       strEqual(leveldir_current->special_flags, flag))
1407     return TRUE;
1408
1409   return FALSE;
1410 }
1411
1412 static struct DateInfo getCurrentDate(void)
1413 {
1414   time_t epoch_seconds = time(NULL);
1415   struct tm *now = localtime(&epoch_seconds);
1416   struct DateInfo date;
1417
1418   date.year  = now->tm_year + 1900;
1419   date.month = now->tm_mon  + 1;
1420   date.day   = now->tm_mday;
1421
1422   date.src   = DATE_SRC_CLOCK;
1423
1424   return date;
1425 }
1426
1427 static void resetEventFlags(struct ElementChangeInfo *change)
1428 {
1429   int i;
1430
1431   for (i = 0; i < NUM_CHANGE_EVENTS; i++)
1432     change->has_event[i] = FALSE;
1433 }
1434
1435 static void resetEventBits(void)
1436 {
1437   int i;
1438
1439   for (i = 0; i < NUM_CE_BITFIELDS; i++)
1440     xx_event_bits[i] = 0;
1441 }
1442
1443 static void setEventFlagsFromEventBits(struct ElementChangeInfo *change)
1444 {
1445   int i;
1446
1447   /* important: only change event flag if corresponding event bit is set
1448      (this is because all xx_event_bits[] values are loaded separately,
1449      and all xx_event_bits[] values are set back to zero before loading
1450      another value xx_event_bits[x] (each value representing 32 flags)) */
1451
1452   for (i = 0; i < NUM_CHANGE_EVENTS; i++)
1453     if (xx_event_bits[CH_EVENT_BITFIELD_NR(i)] & CH_EVENT_BIT(i))
1454       change->has_event[i] = TRUE;
1455 }
1456
1457 static void setEventBitsFromEventFlags(struct ElementChangeInfo *change)
1458 {
1459   int i;
1460
1461   /* in contrast to the above function setEventFlagsFromEventBits(), it
1462      would also be possible to set all bits in xx_event_bits[] to 0 or 1
1463      depending on the corresponding change->has_event[i] values here, as
1464      all xx_event_bits[] values are reset in resetEventBits() before */
1465
1466   for (i = 0; i < NUM_CHANGE_EVENTS; i++)
1467     if (change->has_event[i])
1468       xx_event_bits[CH_EVENT_BITFIELD_NR(i)] |= CH_EVENT_BIT(i);
1469 }
1470
1471 static char *getDefaultElementDescription(struct ElementInfo *ei)
1472 {
1473   static char description[MAX_ELEMENT_NAME_LEN + 1];
1474   char *default_description = (ei->custom_description != NULL ?
1475                                ei->custom_description :
1476                                ei->editor_description);
1477   int i;
1478
1479   // always start with reliable default values
1480   for (i = 0; i < MAX_ELEMENT_NAME_LEN + 1; i++)
1481     description[i] = '\0';
1482
1483   // truncate element description to MAX_ELEMENT_NAME_LEN bytes
1484   strncpy(description, default_description, MAX_ELEMENT_NAME_LEN);
1485
1486   return &description[0];
1487 }
1488
1489 static void setElementDescriptionToDefault(struct ElementInfo *ei)
1490 {
1491   char *default_description = getDefaultElementDescription(ei);
1492   int i;
1493
1494   for (i = 0; i < MAX_ELEMENT_NAME_LEN + 1; i++)
1495     ei->description[i] = default_description[i];
1496 }
1497
1498 static void setConfigToDefaultsFromConfigList(struct LevelFileConfigInfo *conf)
1499 {
1500   int i;
1501
1502   for (i = 0; conf[i].data_type != -1; i++)
1503   {
1504     int default_value = conf[i].default_value;
1505     int data_type = conf[i].data_type;
1506     int conf_type = conf[i].conf_type;
1507     int byte_mask = conf_type & CONF_MASK_BYTES;
1508
1509     if (byte_mask == CONF_MASK_MULTI_BYTES)
1510     {
1511       int default_num_entities = conf[i].default_num_entities;
1512       int max_num_entities = conf[i].max_num_entities;
1513
1514       *(int *)(conf[i].num_entities) = default_num_entities;
1515
1516       if (data_type == TYPE_STRING)
1517       {
1518         char *default_string = conf[i].default_string;
1519         char *string = (char *)(conf[i].value);
1520
1521         strncpy(string, default_string, max_num_entities);
1522       }
1523       else if (data_type == TYPE_ELEMENT_LIST)
1524       {
1525         int *element_array = (int *)(conf[i].value);
1526         int j;
1527
1528         for (j = 0; j < max_num_entities; j++)
1529           element_array[j] = default_value;
1530       }
1531       else if (data_type == TYPE_CONTENT_LIST)
1532       {
1533         struct Content *content = (struct Content *)(conf[i].value);
1534         int c, x, y;
1535
1536         for (c = 0; c < max_num_entities; c++)
1537           for (y = 0; y < 3; y++)
1538             for (x = 0; x < 3; x++)
1539               content[c].e[x][y] = default_value;
1540       }
1541     }
1542     else        // constant size configuration data (1, 2 or 4 bytes)
1543     {
1544       if (data_type == TYPE_BOOLEAN)
1545         *(boolean *)(conf[i].value) = default_value;
1546       else
1547         *(int *)    (conf[i].value) = default_value;
1548     }
1549   }
1550 }
1551
1552 static void copyConfigFromConfigList(struct LevelFileConfigInfo *conf)
1553 {
1554   int i;
1555
1556   for (i = 0; conf[i].data_type != -1; i++)
1557   {
1558     int data_type = conf[i].data_type;
1559     int conf_type = conf[i].conf_type;
1560     int byte_mask = conf_type & CONF_MASK_BYTES;
1561
1562     if (byte_mask == CONF_MASK_MULTI_BYTES)
1563     {
1564       int max_num_entities = conf[i].max_num_entities;
1565
1566       if (data_type == TYPE_STRING)
1567       {
1568         char *string      = (char *)(conf[i].value);
1569         char *string_copy = (char *)(conf[i].value_copy);
1570
1571         strncpy(string_copy, string, max_num_entities);
1572       }
1573       else if (data_type == TYPE_ELEMENT_LIST)
1574       {
1575         int *element_array      = (int *)(conf[i].value);
1576         int *element_array_copy = (int *)(conf[i].value_copy);
1577         int j;
1578
1579         for (j = 0; j < max_num_entities; j++)
1580           element_array_copy[j] = element_array[j];
1581       }
1582       else if (data_type == TYPE_CONTENT_LIST)
1583       {
1584         struct Content *content      = (struct Content *)(conf[i].value);
1585         struct Content *content_copy = (struct Content *)(conf[i].value_copy);
1586         int c, x, y;
1587
1588         for (c = 0; c < max_num_entities; c++)
1589           for (y = 0; y < 3; y++)
1590             for (x = 0; x < 3; x++)
1591               content_copy[c].e[x][y] = content[c].e[x][y];
1592       }
1593     }
1594     else        // constant size configuration data (1, 2 or 4 bytes)
1595     {
1596       if (data_type == TYPE_BOOLEAN)
1597         *(boolean *)(conf[i].value_copy) = *(boolean *)(conf[i].value);
1598       else
1599         *(int *)    (conf[i].value_copy) = *(int *)    (conf[i].value);
1600     }
1601   }
1602 }
1603
1604 void copyElementInfo(struct ElementInfo *ei_from, struct ElementInfo *ei_to)
1605 {
1606   int i;
1607
1608   xx_ei = *ei_from;     // copy element data into temporary buffer
1609   yy_ei = *ei_to;       // copy element data into temporary buffer
1610
1611   copyConfigFromConfigList(chunk_config_CUSX_base);
1612
1613   *ei_from = xx_ei;
1614   *ei_to   = yy_ei;
1615
1616   // ---------- reinitialize and copy change pages ----------
1617
1618   ei_to->num_change_pages = ei_from->num_change_pages;
1619   ei_to->current_change_page = ei_from->current_change_page;
1620
1621   setElementChangePages(ei_to, ei_to->num_change_pages);
1622
1623   for (i = 0; i < ei_to->num_change_pages; i++)
1624     ei_to->change_page[i] = ei_from->change_page[i];
1625
1626   // ---------- copy group element info ----------
1627   if (ei_from->group != NULL && ei_to->group != NULL)   // group or internal
1628     *ei_to->group = *ei_from->group;
1629
1630   // mark this custom element as modified
1631   ei_to->modified_settings = TRUE;
1632 }
1633
1634 void setElementChangePages(struct ElementInfo *ei, int change_pages)
1635 {
1636   int change_page_size = sizeof(struct ElementChangeInfo);
1637
1638   ei->num_change_pages = MAX(1, change_pages);
1639
1640   ei->change_page =
1641     checked_realloc(ei->change_page, ei->num_change_pages * change_page_size);
1642
1643   if (ei->current_change_page >= ei->num_change_pages)
1644     ei->current_change_page = ei->num_change_pages - 1;
1645
1646   ei->change = &ei->change_page[ei->current_change_page];
1647 }
1648
1649 void setElementChangeInfoToDefaults(struct ElementChangeInfo *change)
1650 {
1651   xx_change = *change;          // copy change data into temporary buffer
1652
1653   setConfigToDefaultsFromConfigList(chunk_config_CUSX_change);
1654
1655   *change = xx_change;
1656
1657   resetEventFlags(change);
1658
1659   change->direct_action = 0;
1660   change->other_action = 0;
1661
1662   change->pre_change_function = NULL;
1663   change->change_function = NULL;
1664   change->post_change_function = NULL;
1665 }
1666
1667 static void setLevelInfoToDefaults_Level(struct LevelInfo *level)
1668 {
1669   int i, x, y;
1670
1671   li = *level;          // copy level data into temporary buffer
1672   setConfigToDefaultsFromConfigList(chunk_config_INFO);
1673   *level = li;          // copy temporary buffer back to level data
1674
1675   setLevelInfoToDefaults_EM();
1676   setLevelInfoToDefaults_SP();
1677   setLevelInfoToDefaults_MM();
1678
1679   level->native_em_level = &native_em_level;
1680   level->native_sp_level = &native_sp_level;
1681   level->native_mm_level = &native_mm_level;
1682
1683   level->file_version = FILE_VERSION_ACTUAL;
1684   level->game_version = GAME_VERSION_ACTUAL;
1685
1686   level->creation_date = getCurrentDate();
1687
1688   level->encoding_16bit_field  = TRUE;
1689   level->encoding_16bit_yamyam = TRUE;
1690   level->encoding_16bit_amoeba = TRUE;
1691
1692   // clear level name and level author string buffers
1693   for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
1694     level->name[i] = '\0';
1695   for (i = 0; i < MAX_LEVEL_AUTHOR_LEN; i++)
1696     level->author[i] = '\0';
1697
1698   // set level name and level author to default values
1699   strcpy(level->name, NAMELESS_LEVEL_NAME);
1700   strcpy(level->author, ANONYMOUS_NAME);
1701
1702   // set level playfield to playable default level with player and exit
1703   for (x = 0; x < MAX_LEV_FIELDX; x++)
1704     for (y = 0; y < MAX_LEV_FIELDY; y++)
1705       level->field[x][y] = EL_SAND;
1706
1707   level->field[0][0] = EL_PLAYER_1;
1708   level->field[STD_LEV_FIELDX - 1][STD_LEV_FIELDY - 1] = EL_EXIT_CLOSED;
1709
1710   BorderElement = EL_STEELWALL;
1711
1712   // detect custom elements when loading them
1713   level->file_has_custom_elements = FALSE;
1714
1715   // set all bug compatibility flags to "false" => do not emulate this bug
1716   level->use_action_after_change_bug = FALSE;
1717
1718   if (leveldir_current)
1719   {
1720     // try to determine better author name than 'anonymous'
1721     if (!strEqual(leveldir_current->author, ANONYMOUS_NAME))
1722     {
1723       strncpy(level->author, leveldir_current->author, MAX_LEVEL_AUTHOR_LEN);
1724       level->author[MAX_LEVEL_AUTHOR_LEN] = '\0';
1725     }
1726     else
1727     {
1728       switch (LEVELCLASS(leveldir_current))
1729       {
1730         case LEVELCLASS_TUTORIAL:
1731           strcpy(level->author, PROGRAM_AUTHOR_STRING);
1732           break;
1733
1734         case LEVELCLASS_CONTRIB:
1735           strncpy(level->author, leveldir_current->name, MAX_LEVEL_AUTHOR_LEN);
1736           level->author[MAX_LEVEL_AUTHOR_LEN] = '\0';
1737           break;
1738
1739         case LEVELCLASS_PRIVATE:
1740           strncpy(level->author, getRealName(), MAX_LEVEL_AUTHOR_LEN);
1741           level->author[MAX_LEVEL_AUTHOR_LEN] = '\0';
1742           break;
1743
1744         default:
1745           // keep default value
1746           break;
1747       }
1748     }
1749   }
1750 }
1751
1752 static void setLevelInfoToDefaults_Elements(struct LevelInfo *level)
1753 {
1754   static boolean clipboard_elements_initialized = FALSE;
1755   int i;
1756
1757   InitElementPropertiesStatic();
1758
1759   li = *level;          // copy level data into temporary buffer
1760   setConfigToDefaultsFromConfigList(chunk_config_ELEM);
1761   *level = li;          // copy temporary buffer back to level data
1762
1763   for (i = 0; i < MAX_NUM_ELEMENTS; i++)
1764   {
1765     int element = i;
1766     struct ElementInfo *ei = &element_info[element];
1767
1768     // never initialize clipboard elements after the very first time
1769     // (to be able to use clipboard elements between several levels)
1770     if (IS_CLIPBOARD_ELEMENT(element) && clipboard_elements_initialized)
1771       continue;
1772
1773     if (IS_ENVELOPE(element))
1774     {
1775       int envelope_nr = element - EL_ENVELOPE_1;
1776
1777       setConfigToDefaultsFromConfigList(chunk_config_NOTE);
1778
1779       level->envelope[envelope_nr] = xx_envelope;
1780     }
1781
1782     if (IS_CUSTOM_ELEMENT(element) ||
1783         IS_GROUP_ELEMENT(element) ||
1784         IS_INTERNAL_ELEMENT(element))
1785     {
1786       xx_ei = *ei;      // copy element data into temporary buffer
1787
1788       setConfigToDefaultsFromConfigList(chunk_config_CUSX_base);
1789
1790       *ei = xx_ei;
1791     }
1792
1793     setElementChangePages(ei, 1);
1794     setElementChangeInfoToDefaults(ei->change);
1795
1796     if (IS_CUSTOM_ELEMENT(element) ||
1797         IS_GROUP_ELEMENT(element) ||
1798         IS_INTERNAL_ELEMENT(element))
1799     {
1800       setElementDescriptionToDefault(ei);
1801
1802       ei->modified_settings = FALSE;
1803     }
1804
1805     if (IS_CUSTOM_ELEMENT(element) ||
1806         IS_INTERNAL_ELEMENT(element))
1807     {
1808       // internal values used in level editor
1809
1810       ei->access_type = 0;
1811       ei->access_layer = 0;
1812       ei->access_protected = 0;
1813       ei->walk_to_action = 0;
1814       ei->smash_targets = 0;
1815       ei->deadliness = 0;
1816
1817       ei->can_explode_by_fire = FALSE;
1818       ei->can_explode_smashed = FALSE;
1819       ei->can_explode_impact = FALSE;
1820
1821       ei->current_change_page = 0;
1822     }
1823
1824     if (IS_GROUP_ELEMENT(element) ||
1825         IS_INTERNAL_ELEMENT(element))
1826     {
1827       struct ElementGroupInfo *group;
1828
1829       // initialize memory for list of elements in group
1830       if (ei->group == NULL)
1831         ei->group = checked_malloc(sizeof(struct ElementGroupInfo));
1832
1833       group = ei->group;
1834
1835       xx_group = *group;        // copy group data into temporary buffer
1836
1837       setConfigToDefaultsFromConfigList(chunk_config_GRPX);
1838
1839       *group = xx_group;
1840     }
1841   }
1842
1843   clipboard_elements_initialized = TRUE;
1844 }
1845
1846 static void setLevelInfoToDefaults(struct LevelInfo *level,
1847                                    boolean level_info_only,
1848                                    boolean reset_file_status)
1849 {
1850   setLevelInfoToDefaults_Level(level);
1851
1852   if (!level_info_only)
1853     setLevelInfoToDefaults_Elements(level);
1854
1855   if (reset_file_status)
1856   {
1857     level->no_valid_file = FALSE;
1858     level->no_level_file = FALSE;
1859   }
1860
1861   level->changed = FALSE;
1862 }
1863
1864 static void setFileInfoToDefaults(struct LevelFileInfo *level_file_info)
1865 {
1866   level_file_info->nr = 0;
1867   level_file_info->type = LEVEL_FILE_TYPE_UNKNOWN;
1868   level_file_info->packed = FALSE;
1869
1870   setString(&level_file_info->basename, NULL);
1871   setString(&level_file_info->filename, NULL);
1872 }
1873
1874 int getMappedElement_SB(int, boolean);
1875
1876 static void ActivateLevelTemplate(void)
1877 {
1878   int x, y;
1879
1880   if (check_special_flags("load_xsb_to_ces"))
1881   {
1882     // fill smaller playfields with padding "beyond border wall" elements
1883     if (level.fieldx < level_template.fieldx ||
1884         level.fieldy < level_template.fieldy)
1885     {
1886       short field[level.fieldx][level.fieldy];
1887       int new_fieldx = MAX(level.fieldx, level_template.fieldx);
1888       int new_fieldy = MAX(level.fieldy, level_template.fieldy);
1889       int pos_fieldx = (new_fieldx - level.fieldx) / 2;
1890       int pos_fieldy = (new_fieldy - level.fieldy) / 2;
1891
1892       // copy old playfield (which is smaller than the visible area)
1893       for (y = 0; y < level.fieldy; y++) for (x = 0; x < level.fieldx; x++)
1894         field[x][y] = level.field[x][y];
1895
1896       // fill new, larger playfield with "beyond border wall" elements
1897       for (y = 0; y < new_fieldy; y++) for (x = 0; x < new_fieldx; x++)
1898         level.field[x][y] = getMappedElement_SB('_', TRUE);
1899
1900       // copy the old playfield to the middle of the new playfield
1901       for (y = 0; y < level.fieldy; y++) for (x = 0; x < level.fieldx; x++)
1902         level.field[pos_fieldx + x][pos_fieldy + y] = field[x][y];
1903
1904       level.fieldx = new_fieldx;
1905       level.fieldy = new_fieldy;
1906     }
1907   }
1908
1909   // Currently there is no special action needed to activate the template
1910   // data, because 'element_info' property settings overwrite the original
1911   // level data, while all other variables do not change.
1912
1913   // Exception: 'from_level_template' elements in the original level playfield
1914   // are overwritten with the corresponding elements at the same position in
1915   // playfield from the level template.
1916
1917   for (x = 0; x < level.fieldx; x++)
1918     for (y = 0; y < level.fieldy; y++)
1919       if (level.field[x][y] == EL_FROM_LEVEL_TEMPLATE)
1920         level.field[x][y] = level_template.field[x][y];
1921
1922   if (check_special_flags("load_xsb_to_ces"))
1923   {
1924     struct LevelInfo level_backup = level;
1925
1926     // overwrite all individual level settings from template level settings
1927     level = level_template;
1928
1929     // restore level file info
1930     level.file_info = level_backup.file_info;
1931
1932     // restore playfield size
1933     level.fieldx = level_backup.fieldx;
1934     level.fieldy = level_backup.fieldy;
1935
1936     // restore playfield content
1937     for (x = 0; x < level.fieldx; x++)
1938       for (y = 0; y < level.fieldy; y++)
1939         level.field[x][y] = level_backup.field[x][y];
1940
1941     // restore name and author from individual level
1942     strcpy(level.name,   level_backup.name);
1943     strcpy(level.author, level_backup.author);
1944
1945     // restore flag "use_custom_template"
1946     level.use_custom_template = level_backup.use_custom_template;
1947   }
1948 }
1949
1950 static char *getLevelFilenameFromBasename(char *basename)
1951 {
1952   static char *filename = NULL;
1953
1954   checked_free(filename);
1955
1956   filename = getPath2(getCurrentLevelDir(), basename);
1957
1958   return filename;
1959 }
1960
1961 static int getFileTypeFromBasename(char *basename)
1962 {
1963   // !!! ALSO SEE COMMENT IN checkForPackageFromBasename() !!!
1964
1965   static char *filename = NULL;
1966   struct stat file_status;
1967
1968   // ---------- try to determine file type from filename ----------
1969
1970   // check for typical filename of a Supaplex level package file
1971   if (strlen(basename) == 10 && strPrefixLower(basename, "levels.d"))
1972     return LEVEL_FILE_TYPE_SP;
1973
1974   // check for typical filename of a Diamond Caves II level package file
1975   if (strSuffixLower(basename, ".dc") ||
1976       strSuffixLower(basename, ".dc2"))
1977     return LEVEL_FILE_TYPE_DC;
1978
1979   // check for typical filename of a Sokoban level package file
1980   if (strSuffixLower(basename, ".xsb") &&
1981       strchr(basename, '%') == NULL)
1982     return LEVEL_FILE_TYPE_SB;
1983
1984   // ---------- try to determine file type from filesize ----------
1985
1986   checked_free(filename);
1987   filename = getPath2(getCurrentLevelDir(), basename);
1988
1989   if (stat(filename, &file_status) == 0)
1990   {
1991     // check for typical filesize of a Supaplex level package file
1992     if (file_status.st_size == 170496)
1993       return LEVEL_FILE_TYPE_SP;
1994   }
1995
1996   return LEVEL_FILE_TYPE_UNKNOWN;
1997 }
1998
1999 static int getFileTypeFromMagicBytes(char *filename, int type)
2000 {
2001   File *file;
2002
2003   if ((file = openFile(filename, MODE_READ)))
2004   {
2005     char chunk_name[CHUNK_ID_LEN + 1];
2006
2007     getFileChunkBE(file, chunk_name, NULL);
2008
2009     if (strEqual(chunk_name, "MMII") ||
2010         strEqual(chunk_name, "MIRR"))
2011       type = LEVEL_FILE_TYPE_MM;
2012
2013     closeFile(file);
2014   }
2015
2016   return type;
2017 }
2018
2019 static boolean checkForPackageFromBasename(char *basename)
2020 {
2021   // !!! WON'T WORK ANYMORE IF getFileTypeFromBasename() ALSO DETECTS !!!
2022   // !!! SINGLE LEVELS (CURRENTLY ONLY DETECTS LEVEL PACKAGES         !!!
2023
2024   return (getFileTypeFromBasename(basename) != LEVEL_FILE_TYPE_UNKNOWN);
2025 }
2026
2027 static char *getSingleLevelBasenameExt(int nr, char *extension)
2028 {
2029   static char basename[MAX_FILENAME_LEN];
2030
2031   if (nr < 0)
2032     sprintf(basename, "%s", LEVELTEMPLATE_FILENAME);
2033   else
2034     sprintf(basename, "%03d.%s", nr, extension);
2035
2036   return basename;
2037 }
2038
2039 static char *getSingleLevelBasename(int nr)
2040 {
2041   return getSingleLevelBasenameExt(nr, LEVELFILE_EXTENSION);
2042 }
2043
2044 static char *getPackedLevelBasename(int type)
2045 {
2046   static char basename[MAX_FILENAME_LEN];
2047   char *directory = getCurrentLevelDir();
2048   Directory *dir;
2049   DirectoryEntry *dir_entry;
2050
2051   strcpy(basename, UNDEFINED_FILENAME);         // default: undefined file
2052
2053   if ((dir = openDirectory(directory)) == NULL)
2054   {
2055     Error(ERR_WARN, "cannot read current level directory '%s'", directory);
2056
2057     return basename;
2058   }
2059
2060   while ((dir_entry = readDirectory(dir)) != NULL)      // loop all entries
2061   {
2062     char *entry_basename = dir_entry->basename;
2063     int entry_type = getFileTypeFromBasename(entry_basename);
2064
2065     if (entry_type != LEVEL_FILE_TYPE_UNKNOWN)  // found valid level package
2066     {
2067       if (type == LEVEL_FILE_TYPE_UNKNOWN ||
2068           type == entry_type)
2069       {
2070         strcpy(basename, entry_basename);
2071
2072         break;
2073       }
2074     }
2075   }
2076
2077   closeDirectory(dir);
2078
2079   return basename;
2080 }
2081
2082 static char *getSingleLevelFilename(int nr)
2083 {
2084   return getLevelFilenameFromBasename(getSingleLevelBasename(nr));
2085 }
2086
2087 #if ENABLE_UNUSED_CODE
2088 static char *getPackedLevelFilename(int type)
2089 {
2090   return getLevelFilenameFromBasename(getPackedLevelBasename(type));
2091 }
2092 #endif
2093
2094 char *getDefaultLevelFilename(int nr)
2095 {
2096   return getSingleLevelFilename(nr);
2097 }
2098
2099 #if ENABLE_UNUSED_CODE
2100 static void setLevelFileInfo_SingleLevelFilename(struct LevelFileInfo *lfi,
2101                                                  int type)
2102 {
2103   lfi->type = type;
2104   lfi->packed = FALSE;
2105
2106   setString(&lfi->basename, getSingleLevelBasename(lfi->nr, lfi->type));
2107   setString(&lfi->filename, getLevelFilenameFromBasename(lfi->basename));
2108 }
2109 #endif
2110
2111 static void setLevelFileInfo_FormatLevelFilename(struct LevelFileInfo *lfi,
2112                                                  int type, char *format, ...)
2113 {
2114   static char basename[MAX_FILENAME_LEN];
2115   va_list ap;
2116
2117   va_start(ap, format);
2118   vsprintf(basename, format, ap);
2119   va_end(ap);
2120
2121   lfi->type = type;
2122   lfi->packed = FALSE;
2123
2124   setString(&lfi->basename, basename);
2125   setString(&lfi->filename, getLevelFilenameFromBasename(lfi->basename));
2126 }
2127
2128 static void setLevelFileInfo_PackedLevelFilename(struct LevelFileInfo *lfi,
2129                                                  int type)
2130 {
2131   lfi->type = type;
2132   lfi->packed = TRUE;
2133
2134   setString(&lfi->basename, getPackedLevelBasename(lfi->type));
2135   setString(&lfi->filename, getLevelFilenameFromBasename(lfi->basename));
2136 }
2137
2138 static int getFiletypeFromID(char *filetype_id)
2139 {
2140   char *filetype_id_lower;
2141   int filetype = LEVEL_FILE_TYPE_UNKNOWN;
2142   int i;
2143
2144   if (filetype_id == NULL)
2145     return LEVEL_FILE_TYPE_UNKNOWN;
2146
2147   filetype_id_lower = getStringToLower(filetype_id);
2148
2149   for (i = 0; filetype_id_list[i].id != NULL; i++)
2150   {
2151     char *id_lower = getStringToLower(filetype_id_list[i].id);
2152
2153     if (strEqual(filetype_id_lower, id_lower))
2154       filetype = filetype_id_list[i].filetype;
2155
2156     free(id_lower);
2157
2158     if (filetype != LEVEL_FILE_TYPE_UNKNOWN)
2159       break;
2160   }
2161
2162   free(filetype_id_lower);
2163
2164   return filetype;
2165 }
2166
2167 char *getLocalLevelTemplateFilename(void)
2168 {
2169   return getDefaultLevelFilename(-1);
2170 }
2171
2172 char *getGlobalLevelTemplateFilename(void)
2173 {
2174   // global variable "leveldir_current" must be modified in the loop below
2175   LevelDirTree *leveldir_current_last = leveldir_current;
2176   char *filename = NULL;
2177
2178   // check for template level in path from current to topmost tree node
2179
2180   while (leveldir_current != NULL)
2181   {
2182     filename = getDefaultLevelFilename(-1);
2183
2184     if (fileExists(filename))
2185       break;
2186
2187     leveldir_current = leveldir_current->node_parent;
2188   }
2189
2190   // restore global variable "leveldir_current" modified in above loop
2191   leveldir_current = leveldir_current_last;
2192
2193   return filename;
2194 }
2195
2196 static void determineLevelFileInfo_Filename(struct LevelFileInfo *lfi)
2197 {
2198   int nr = lfi->nr;
2199
2200   // special case: level number is negative => check for level template file
2201   if (nr < 0)
2202   {
2203     setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_RND,
2204                                          getSingleLevelBasename(-1));
2205
2206     // replace local level template filename with global template filename
2207     setString(&lfi->filename, getGlobalLevelTemplateFilename());
2208
2209     // no fallback if template file not existing
2210     return;
2211   }
2212
2213   // special case: check for file name/pattern specified in "levelinfo.conf"
2214   if (leveldir_current->level_filename != NULL)
2215   {
2216     int filetype = getFiletypeFromID(leveldir_current->level_filetype);
2217
2218     setLevelFileInfo_FormatLevelFilename(lfi, filetype,
2219                                          leveldir_current->level_filename, nr);
2220
2221     lfi->packed = checkForPackageFromBasename(leveldir_current->level_filename);
2222
2223     if (fileExists(lfi->filename))
2224       return;
2225   }
2226   else if (leveldir_current->level_filetype != NULL)
2227   {
2228     int filetype = getFiletypeFromID(leveldir_current->level_filetype);
2229
2230     // check for specified native level file with standard file name
2231     setLevelFileInfo_FormatLevelFilename(lfi, filetype,
2232                                          "%03d.%s", nr, LEVELFILE_EXTENSION);
2233     if (fileExists(lfi->filename))
2234       return;
2235   }
2236
2237   // check for native Rocks'n'Diamonds level file
2238   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_RND,
2239                                        "%03d.%s", nr, LEVELFILE_EXTENSION);
2240   if (fileExists(lfi->filename))
2241     return;
2242
2243   // check for Emerald Mine level file (V1)
2244   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "a%c%c",
2245                                        'a' + (nr / 10) % 26, '0' + nr % 10);
2246   if (fileExists(lfi->filename))
2247     return;
2248   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "A%c%c",
2249                                        'A' + (nr / 10) % 26, '0' + nr % 10);
2250   if (fileExists(lfi->filename))
2251     return;
2252
2253   // check for Emerald Mine level file (V2 to V5)
2254   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%d", nr);
2255   if (fileExists(lfi->filename))
2256     return;
2257
2258   // check for Emerald Mine level file (V6 / single mode)
2259   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%02ds", nr);
2260   if (fileExists(lfi->filename))
2261     return;
2262   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%02dS", nr);
2263   if (fileExists(lfi->filename))
2264     return;
2265
2266   // check for Emerald Mine level file (V6 / teamwork mode)
2267   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%02dt", nr);
2268   if (fileExists(lfi->filename))
2269     return;
2270   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_EM, "%02dT", nr);
2271   if (fileExists(lfi->filename))
2272     return;
2273
2274   // check for various packed level file formats
2275   setLevelFileInfo_PackedLevelFilename(lfi, LEVEL_FILE_TYPE_UNKNOWN);
2276   if (fileExists(lfi->filename))
2277     return;
2278
2279   // no known level file found -- use default values (and fail later)
2280   setLevelFileInfo_FormatLevelFilename(lfi, LEVEL_FILE_TYPE_RND,
2281                                        "%03d.%s", nr, LEVELFILE_EXTENSION);
2282 }
2283
2284 static void determineLevelFileInfo_Filetype(struct LevelFileInfo *lfi)
2285 {
2286   if (lfi->type == LEVEL_FILE_TYPE_UNKNOWN)
2287     lfi->type = getFileTypeFromBasename(lfi->basename);
2288
2289   if (lfi->type == LEVEL_FILE_TYPE_RND)
2290     lfi->type = getFileTypeFromMagicBytes(lfi->filename, lfi->type);
2291 }
2292
2293 static void setLevelFileInfo(struct LevelFileInfo *level_file_info, int nr)
2294 {
2295   // always start with reliable default values
2296   setFileInfoToDefaults(level_file_info);
2297
2298   level_file_info->nr = nr;     // set requested level number
2299
2300   determineLevelFileInfo_Filename(level_file_info);
2301   determineLevelFileInfo_Filetype(level_file_info);
2302 }
2303
2304 static void copyLevelFileInfo(struct LevelFileInfo *lfi_from,
2305                               struct LevelFileInfo *lfi_to)
2306 {
2307   lfi_to->nr     = lfi_from->nr;
2308   lfi_to->type   = lfi_from->type;
2309   lfi_to->packed = lfi_from->packed;
2310
2311   setString(&lfi_to->basename, lfi_from->basename);
2312   setString(&lfi_to->filename, lfi_from->filename);
2313 }
2314
2315 // ----------------------------------------------------------------------------
2316 // functions for loading R'n'D level
2317 // ----------------------------------------------------------------------------
2318
2319 static int getMappedElement(int element)
2320 {
2321   // remap some (historic, now obsolete) elements
2322
2323   switch (element)
2324   {
2325     case EL_PLAYER_OBSOLETE:
2326       element = EL_PLAYER_1;
2327       break;
2328
2329     case EL_KEY_OBSOLETE:
2330       element = EL_KEY_1;
2331       break;
2332
2333     case EL_EM_KEY_1_FILE_OBSOLETE:
2334       element = EL_EM_KEY_1;
2335       break;
2336
2337     case EL_EM_KEY_2_FILE_OBSOLETE:
2338       element = EL_EM_KEY_2;
2339       break;
2340
2341     case EL_EM_KEY_3_FILE_OBSOLETE:
2342       element = EL_EM_KEY_3;
2343       break;
2344
2345     case EL_EM_KEY_4_FILE_OBSOLETE:
2346       element = EL_EM_KEY_4;
2347       break;
2348
2349     case EL_ENVELOPE_OBSOLETE:
2350       element = EL_ENVELOPE_1;
2351       break;
2352
2353     case EL_SP_EMPTY:
2354       element = EL_EMPTY;
2355       break;
2356
2357     default:
2358       if (element >= NUM_FILE_ELEMENTS)
2359       {
2360         Error(ERR_WARN, "invalid level element %d", element);
2361
2362         element = EL_UNKNOWN;
2363       }
2364       break;
2365   }
2366
2367   return element;
2368 }
2369
2370 static int getMappedElementByVersion(int element, int game_version)
2371 {
2372   // remap some elements due to certain game version
2373
2374   if (game_version <= VERSION_IDENT(2,2,0,0))
2375   {
2376     // map game font elements
2377     element = (element == EL_CHAR('[')  ? EL_CHAR_AUMLAUT :
2378                element == EL_CHAR('\\') ? EL_CHAR_OUMLAUT :
2379                element == EL_CHAR(']')  ? EL_CHAR_UUMLAUT :
2380                element == EL_CHAR('^')  ? EL_CHAR_COPYRIGHT : element);
2381   }
2382
2383   if (game_version < VERSION_IDENT(3,0,0,0))
2384   {
2385     // map Supaplex gravity tube elements
2386     element = (element == EL_SP_GRAVITY_PORT_LEFT  ? EL_SP_PORT_LEFT  :
2387                element == EL_SP_GRAVITY_PORT_RIGHT ? EL_SP_PORT_RIGHT :
2388                element == EL_SP_GRAVITY_PORT_UP    ? EL_SP_PORT_UP    :
2389                element == EL_SP_GRAVITY_PORT_DOWN  ? EL_SP_PORT_DOWN  :
2390                element);
2391   }
2392
2393   return element;
2394 }
2395
2396 static int LoadLevel_VERS(File *file, int chunk_size, struct LevelInfo *level)
2397 {
2398   level->file_version = getFileVersion(file);
2399   level->game_version = getFileVersion(file);
2400
2401   return chunk_size;
2402 }
2403
2404 static int LoadLevel_DATE(File *file, int chunk_size, struct LevelInfo *level)
2405 {
2406   level->creation_date.year  = getFile16BitBE(file);
2407   level->creation_date.month = getFile8Bit(file);
2408   level->creation_date.day   = getFile8Bit(file);
2409
2410   level->creation_date.src   = DATE_SRC_LEVELFILE;
2411
2412   return chunk_size;
2413 }
2414
2415 static int LoadLevel_HEAD(File *file, int chunk_size, struct LevelInfo *level)
2416 {
2417   int initial_player_stepsize;
2418   int initial_player_gravity;
2419   int i, x, y;
2420
2421   level->fieldx = getFile8Bit(file);
2422   level->fieldy = getFile8Bit(file);
2423
2424   level->time           = getFile16BitBE(file);
2425   level->gems_needed    = getFile16BitBE(file);
2426
2427   for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
2428     level->name[i] = getFile8Bit(file);
2429   level->name[MAX_LEVEL_NAME_LEN] = 0;
2430
2431   for (i = 0; i < LEVEL_SCORE_ELEMENTS; i++)
2432     level->score[i] = getFile8Bit(file);
2433
2434   level->num_yamyam_contents = STD_ELEMENT_CONTENTS;
2435   for (i = 0; i < STD_ELEMENT_CONTENTS; i++)
2436     for (y = 0; y < 3; y++)
2437       for (x = 0; x < 3; x++)
2438         level->yamyam_content[i].e[x][y] = getMappedElement(getFile8Bit(file));
2439
2440   level->amoeba_speed           = getFile8Bit(file);
2441   level->time_magic_wall        = getFile8Bit(file);
2442   level->time_wheel             = getFile8Bit(file);
2443   level->amoeba_content         = getMappedElement(getFile8Bit(file));
2444
2445   initial_player_stepsize       = (getFile8Bit(file) == 1 ? STEPSIZE_FAST :
2446                                    STEPSIZE_NORMAL);
2447
2448   for (i = 0; i < MAX_PLAYERS; i++)
2449     level->initial_player_stepsize[i] = initial_player_stepsize;
2450
2451   initial_player_gravity        = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2452
2453   for (i = 0; i < MAX_PLAYERS; i++)
2454     level->initial_player_gravity[i] = initial_player_gravity;
2455
2456   level->encoding_16bit_field   = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2457   level->em_slippery_gems       = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2458
2459   level->use_custom_template    = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2460
2461   level->block_last_field       = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2462   level->sp_block_last_field    = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2463   level->can_move_into_acid_bits = getFile32BitBE(file);
2464   level->dont_collide_with_bits = getFile8Bit(file);
2465
2466   level->use_spring_bug         = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2467   level->use_step_counter       = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2468
2469   level->instant_relocation     = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2470   level->can_pass_to_walkable   = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2471   level->grow_into_diggable     = (getFile8Bit(file) == 1 ? TRUE : FALSE);
2472
2473   level->game_engine_type       = getFile8Bit(file);
2474
2475   ReadUnusedBytesFromFile(file, LEVEL_CHUNK_HEAD_UNUSED);
2476
2477   return chunk_size;
2478 }
2479
2480 static int LoadLevel_NAME(File *file, int chunk_size, struct LevelInfo *level)
2481 {
2482   int i;
2483
2484   for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
2485     level->name[i] = getFile8Bit(file);
2486   level->name[MAX_LEVEL_NAME_LEN] = 0;
2487
2488   return chunk_size;
2489 }
2490
2491 static int LoadLevel_AUTH(File *file, int chunk_size, struct LevelInfo *level)
2492 {
2493   int i;
2494
2495   for (i = 0; i < MAX_LEVEL_AUTHOR_LEN; i++)
2496     level->author[i] = getFile8Bit(file);
2497   level->author[MAX_LEVEL_AUTHOR_LEN] = 0;
2498
2499   return chunk_size;
2500 }
2501
2502 static int LoadLevel_BODY(File *file, int chunk_size, struct LevelInfo *level)
2503 {
2504   int x, y;
2505   int chunk_size_expected = level->fieldx * level->fieldy;
2506
2507   /* Note: "chunk_size" was wrong before version 2.0 when elements are
2508      stored with 16-bit encoding (and should be twice as big then).
2509      Even worse, playfield data was stored 16-bit when only yamyam content
2510      contained 16-bit elements and vice versa. */
2511
2512   if (level->encoding_16bit_field && level->file_version >= FILE_VERSION_2_0)
2513     chunk_size_expected *= 2;
2514
2515   if (chunk_size_expected != chunk_size)
2516   {
2517     ReadUnusedBytesFromFile(file, chunk_size);
2518     return chunk_size_expected;
2519   }
2520
2521   for (y = 0; y < level->fieldy; y++)
2522     for (x = 0; x < level->fieldx; x++)
2523       level->field[x][y] =
2524         getMappedElement(level->encoding_16bit_field ? getFile16BitBE(file) :
2525                          getFile8Bit(file));
2526   return chunk_size;
2527 }
2528
2529 static int LoadLevel_CONT(File *file, int chunk_size, struct LevelInfo *level)
2530 {
2531   int i, x, y;
2532   int header_size = 4;
2533   int content_size = MAX_ELEMENT_CONTENTS * 3 * 3;
2534   int chunk_size_expected = header_size + content_size;
2535
2536   /* Note: "chunk_size" was wrong before version 2.0 when elements are
2537      stored with 16-bit encoding (and should be twice as big then).
2538      Even worse, playfield data was stored 16-bit when only yamyam content
2539      contained 16-bit elements and vice versa. */
2540
2541   if (level->encoding_16bit_field && level->file_version >= FILE_VERSION_2_0)
2542     chunk_size_expected += content_size;
2543
2544   if (chunk_size_expected != chunk_size)
2545   {
2546     ReadUnusedBytesFromFile(file, chunk_size);
2547     return chunk_size_expected;
2548   }
2549
2550   getFile8Bit(file);
2551   level->num_yamyam_contents = getFile8Bit(file);
2552   getFile8Bit(file);
2553   getFile8Bit(file);
2554
2555   // correct invalid number of content fields -- should never happen
2556   if (level->num_yamyam_contents < 1 ||
2557       level->num_yamyam_contents > MAX_ELEMENT_CONTENTS)
2558     level->num_yamyam_contents = STD_ELEMENT_CONTENTS;
2559
2560   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
2561     for (y = 0; y < 3; y++)
2562       for (x = 0; x < 3; x++)
2563         level->yamyam_content[i].e[x][y] =
2564           getMappedElement(level->encoding_16bit_field ?
2565                            getFile16BitBE(file) : getFile8Bit(file));
2566   return chunk_size;
2567 }
2568
2569 static int LoadLevel_CNT2(File *file, int chunk_size, struct LevelInfo *level)
2570 {
2571   int i, x, y;
2572   int element;
2573   int num_contents;
2574   int content_array[MAX_ELEMENT_CONTENTS][3][3];
2575
2576   element = getMappedElement(getFile16BitBE(file));
2577   num_contents = getFile8Bit(file);
2578
2579   getFile8Bit(file);    // content x size (unused)
2580   getFile8Bit(file);    // content y size (unused)
2581
2582   ReadUnusedBytesFromFile(file, LEVEL_CHUNK_CNT2_UNUSED);
2583
2584   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
2585     for (y = 0; y < 3; y++)
2586       for (x = 0; x < 3; x++)
2587         content_array[i][x][y] = getMappedElement(getFile16BitBE(file));
2588
2589   // correct invalid number of content fields -- should never happen
2590   if (num_contents < 1 || num_contents > MAX_ELEMENT_CONTENTS)
2591     num_contents = STD_ELEMENT_CONTENTS;
2592
2593   if (element == EL_YAMYAM)
2594   {
2595     level->num_yamyam_contents = num_contents;
2596
2597     for (i = 0; i < num_contents; i++)
2598       for (y = 0; y < 3; y++)
2599         for (x = 0; x < 3; x++)
2600           level->yamyam_content[i].e[x][y] = content_array[i][x][y];
2601   }
2602   else if (element == EL_BD_AMOEBA)
2603   {
2604     level->amoeba_content = content_array[0][0][0];
2605   }
2606   else
2607   {
2608     Error(ERR_WARN, "cannot load content for element '%d'", element);
2609   }
2610
2611   return chunk_size;
2612 }
2613
2614 static int LoadLevel_CNT3(File *file, int chunk_size, struct LevelInfo *level)
2615 {
2616   int i;
2617   int element;
2618   int envelope_nr;
2619   int envelope_len;
2620   int chunk_size_expected;
2621
2622   element = getMappedElement(getFile16BitBE(file));
2623   if (!IS_ENVELOPE(element))
2624     element = EL_ENVELOPE_1;
2625
2626   envelope_nr = element - EL_ENVELOPE_1;
2627
2628   envelope_len = getFile16BitBE(file);
2629
2630   level->envelope[envelope_nr].xsize = getFile8Bit(file);
2631   level->envelope[envelope_nr].ysize = getFile8Bit(file);
2632
2633   ReadUnusedBytesFromFile(file, LEVEL_CHUNK_CNT3_UNUSED);
2634
2635   chunk_size_expected = LEVEL_CHUNK_CNT3_SIZE(envelope_len);
2636   if (chunk_size_expected != chunk_size)
2637   {
2638     ReadUnusedBytesFromFile(file, chunk_size - LEVEL_CHUNK_CNT3_HEADER);
2639     return chunk_size_expected;
2640   }
2641
2642   for (i = 0; i < envelope_len; i++)
2643     level->envelope[envelope_nr].text[i] = getFile8Bit(file);
2644
2645   return chunk_size;
2646 }
2647
2648 static int LoadLevel_CUS1(File *file, int chunk_size, struct LevelInfo *level)
2649 {
2650   int num_changed_custom_elements = getFile16BitBE(file);
2651   int chunk_size_expected = 2 + num_changed_custom_elements * 6;
2652   int i;
2653
2654   if (chunk_size_expected != chunk_size)
2655   {
2656     ReadUnusedBytesFromFile(file, chunk_size - 2);
2657     return chunk_size_expected;
2658   }
2659
2660   for (i = 0; i < num_changed_custom_elements; i++)
2661   {
2662     int element = getMappedElement(getFile16BitBE(file));
2663     int properties = getFile32BitBE(file);
2664
2665     if (IS_CUSTOM_ELEMENT(element))
2666       element_info[element].properties[EP_BITFIELD_BASE_NR] = properties;
2667     else
2668       Error(ERR_WARN, "invalid custom element number %d", element);
2669
2670     // older game versions that wrote level files with CUS1 chunks used
2671     // different default push delay values (not yet stored in level file)
2672     element_info[element].push_delay_fixed = 2;
2673     element_info[element].push_delay_random = 8;
2674   }
2675
2676   level->file_has_custom_elements = TRUE;
2677
2678   return chunk_size;
2679 }
2680
2681 static int LoadLevel_CUS2(File *file, int chunk_size, struct LevelInfo *level)
2682 {
2683   int num_changed_custom_elements = getFile16BitBE(file);
2684   int chunk_size_expected = 2 + num_changed_custom_elements * 4;
2685   int i;
2686
2687   if (chunk_size_expected != chunk_size)
2688   {
2689     ReadUnusedBytesFromFile(file, chunk_size - 2);
2690     return chunk_size_expected;
2691   }
2692
2693   for (i = 0; i < num_changed_custom_elements; i++)
2694   {
2695     int element = getMappedElement(getFile16BitBE(file));
2696     int custom_target_element = getMappedElement(getFile16BitBE(file));
2697
2698     if (IS_CUSTOM_ELEMENT(element))
2699       element_info[element].change->target_element = custom_target_element;
2700     else
2701       Error(ERR_WARN, "invalid custom element number %d", element);
2702   }
2703
2704   level->file_has_custom_elements = TRUE;
2705
2706   return chunk_size;
2707 }
2708
2709 static int LoadLevel_CUS3(File *file, int chunk_size, struct LevelInfo *level)
2710 {
2711   int num_changed_custom_elements = getFile16BitBE(file);
2712   int chunk_size_expected = LEVEL_CHUNK_CUS3_SIZE(num_changed_custom_elements);
2713   int i, j, x, y;
2714
2715   if (chunk_size_expected != chunk_size)
2716   {
2717     ReadUnusedBytesFromFile(file, chunk_size - 2);
2718     return chunk_size_expected;
2719   }
2720
2721   for (i = 0; i < num_changed_custom_elements; i++)
2722   {
2723     int element = getMappedElement(getFile16BitBE(file));
2724     struct ElementInfo *ei = &element_info[element];
2725     unsigned int event_bits;
2726
2727     if (!IS_CUSTOM_ELEMENT(element))
2728     {
2729       Error(ERR_WARN, "invalid custom element number %d", element);
2730
2731       element = EL_INTERNAL_DUMMY;
2732     }
2733
2734     for (j = 0; j < MAX_ELEMENT_NAME_LEN; j++)
2735       ei->description[j] = getFile8Bit(file);
2736     ei->description[MAX_ELEMENT_NAME_LEN] = 0;
2737
2738     ei->properties[EP_BITFIELD_BASE_NR] = getFile32BitBE(file);
2739
2740     // some free bytes for future properties and padding
2741     ReadUnusedBytesFromFile(file, 7);
2742
2743     ei->use_gfx_element = getFile8Bit(file);
2744     ei->gfx_element_initial = getMappedElement(getFile16BitBE(file));
2745
2746     ei->collect_score_initial = getFile8Bit(file);
2747     ei->collect_count_initial = getFile8Bit(file);
2748
2749     ei->push_delay_fixed = getFile16BitBE(file);
2750     ei->push_delay_random = getFile16BitBE(file);
2751     ei->move_delay_fixed = getFile16BitBE(file);
2752     ei->move_delay_random = getFile16BitBE(file);
2753
2754     ei->move_pattern = getFile16BitBE(file);
2755     ei->move_direction_initial = getFile8Bit(file);
2756     ei->move_stepsize = getFile8Bit(file);
2757
2758     for (y = 0; y < 3; y++)
2759       for (x = 0; x < 3; x++)
2760         ei->content.e[x][y] = getMappedElement(getFile16BitBE(file));
2761
2762     event_bits = getFile32BitBE(file);
2763     for (j = 0; j < NUM_CHANGE_EVENTS; j++)
2764       if (event_bits & (1 << j))
2765         ei->change->has_event[j] = TRUE;
2766
2767     ei->change->target_element = getMappedElement(getFile16BitBE(file));
2768
2769     ei->change->delay_fixed = getFile16BitBE(file);
2770     ei->change->delay_random = getFile16BitBE(file);
2771     ei->change->delay_frames = getFile16BitBE(file);
2772
2773     ei->change->initial_trigger_element= getMappedElement(getFile16BitBE(file));
2774
2775     ei->change->explode = getFile8Bit(file);
2776     ei->change->use_target_content = getFile8Bit(file);
2777     ei->change->only_if_complete = getFile8Bit(file);
2778     ei->change->use_random_replace = getFile8Bit(file);
2779
2780     ei->change->random_percentage = getFile8Bit(file);
2781     ei->change->replace_when = getFile8Bit(file);
2782
2783     for (y = 0; y < 3; y++)
2784       for (x = 0; x < 3; x++)
2785         ei->change->target_content.e[x][y] =
2786           getMappedElement(getFile16BitBE(file));
2787
2788     ei->slippery_type = getFile8Bit(file);
2789
2790     // some free bytes for future properties and padding
2791     ReadUnusedBytesFromFile(file, LEVEL_CPART_CUS3_UNUSED);
2792
2793     // mark that this custom element has been modified
2794     ei->modified_settings = TRUE;
2795   }
2796
2797   level->file_has_custom_elements = TRUE;
2798
2799   return chunk_size;
2800 }
2801
2802 static int LoadLevel_CUS4(File *file, int chunk_size, struct LevelInfo *level)
2803 {
2804   struct ElementInfo *ei;
2805   int chunk_size_expected;
2806   int element;
2807   int i, j, x, y;
2808
2809   // ---------- custom element base property values (96 bytes) ----------------
2810
2811   element = getMappedElement(getFile16BitBE(file));
2812
2813   if (!IS_CUSTOM_ELEMENT(element))
2814   {
2815     Error(ERR_WARN, "invalid custom element number %d", element);
2816
2817     ReadUnusedBytesFromFile(file, chunk_size - 2);
2818     return chunk_size;
2819   }
2820
2821   ei = &element_info[element];
2822
2823   for (i = 0; i < MAX_ELEMENT_NAME_LEN; i++)
2824     ei->description[i] = getFile8Bit(file);
2825   ei->description[MAX_ELEMENT_NAME_LEN] = 0;
2826
2827   ei->properties[EP_BITFIELD_BASE_NR] = getFile32BitBE(file);
2828
2829   ReadUnusedBytesFromFile(file, 4);     // reserved for more base properties
2830
2831   ei->num_change_pages = getFile8Bit(file);
2832
2833   chunk_size_expected = LEVEL_CHUNK_CUS4_SIZE(ei->num_change_pages);
2834   if (chunk_size_expected != chunk_size)
2835   {
2836     ReadUnusedBytesFromFile(file, chunk_size - 43);
2837     return chunk_size_expected;
2838   }
2839
2840   ei->ce_value_fixed_initial = getFile16BitBE(file);
2841   ei->ce_value_random_initial = getFile16BitBE(file);
2842   ei->use_last_ce_value = getFile8Bit(file);
2843
2844   ei->use_gfx_element = getFile8Bit(file);
2845   ei->gfx_element_initial = getMappedElement(getFile16BitBE(file));
2846
2847   ei->collect_score_initial = getFile8Bit(file);
2848   ei->collect_count_initial = getFile8Bit(file);
2849
2850   ei->drop_delay_fixed = getFile8Bit(file);
2851   ei->push_delay_fixed = getFile8Bit(file);
2852   ei->drop_delay_random = getFile8Bit(file);
2853   ei->push_delay_random = getFile8Bit(file);
2854   ei->move_delay_fixed = getFile16BitBE(file);
2855   ei->move_delay_random = getFile16BitBE(file);
2856
2857   // bits 0 - 15 of "move_pattern" ...
2858   ei->move_pattern = getFile16BitBE(file);
2859   ei->move_direction_initial = getFile8Bit(file);
2860   ei->move_stepsize = getFile8Bit(file);
2861
2862   ei->slippery_type = getFile8Bit(file);
2863
2864   for (y = 0; y < 3; y++)
2865     for (x = 0; x < 3; x++)
2866       ei->content.e[x][y] = getMappedElement(getFile16BitBE(file));
2867
2868   ei->move_enter_element = getMappedElement(getFile16BitBE(file));
2869   ei->move_leave_element = getMappedElement(getFile16BitBE(file));
2870   ei->move_leave_type = getFile8Bit(file);
2871
2872   // ... bits 16 - 31 of "move_pattern" (not nice, but downward compatible)
2873   ei->move_pattern |= (getFile16BitBE(file) << 16);
2874
2875   ei->access_direction = getFile8Bit(file);
2876
2877   ei->explosion_delay = getFile8Bit(file);
2878   ei->ignition_delay = getFile8Bit(file);
2879   ei->explosion_type = getFile8Bit(file);
2880
2881   // some free bytes for future custom property values and padding
2882   ReadUnusedBytesFromFile(file, 1);
2883
2884   // ---------- change page property values (48 bytes) ------------------------
2885
2886   setElementChangePages(ei, ei->num_change_pages);
2887
2888   for (i = 0; i < ei->num_change_pages; i++)
2889   {
2890     struct ElementChangeInfo *change = &ei->change_page[i];
2891     unsigned int event_bits;
2892
2893     // always start with reliable default values
2894     setElementChangeInfoToDefaults(change);
2895
2896     // bits 0 - 31 of "has_event[]" ...
2897     event_bits = getFile32BitBE(file);
2898     for (j = 0; j < MIN(NUM_CHANGE_EVENTS, 32); j++)
2899       if (event_bits & (1 << j))
2900         change->has_event[j] = TRUE;
2901
2902     change->target_element = getMappedElement(getFile16BitBE(file));
2903
2904     change->delay_fixed = getFile16BitBE(file);
2905     change->delay_random = getFile16BitBE(file);
2906     change->delay_frames = getFile16BitBE(file);
2907
2908     change->initial_trigger_element = getMappedElement(getFile16BitBE(file));
2909
2910     change->explode = getFile8Bit(file);
2911     change->use_target_content = getFile8Bit(file);
2912     change->only_if_complete = getFile8Bit(file);
2913     change->use_random_replace = getFile8Bit(file);
2914
2915     change->random_percentage = getFile8Bit(file);
2916     change->replace_when = getFile8Bit(file);
2917
2918     for (y = 0; y < 3; y++)
2919       for (x = 0; x < 3; x++)
2920         change->target_content.e[x][y]= getMappedElement(getFile16BitBE(file));
2921
2922     change->can_change = getFile8Bit(file);
2923
2924     change->trigger_side = getFile8Bit(file);
2925
2926     change->trigger_player = getFile8Bit(file);
2927     change->trigger_page = getFile8Bit(file);
2928
2929     change->trigger_page = (change->trigger_page == CH_PAGE_ANY_FILE ?
2930                             CH_PAGE_ANY : (1 << change->trigger_page));
2931
2932     change->has_action = getFile8Bit(file);
2933     change->action_type = getFile8Bit(file);
2934     change->action_mode = getFile8Bit(file);
2935     change->action_arg = getFile16BitBE(file);
2936
2937     // ... bits 32 - 39 of "has_event[]" (not nice, but downward compatible)
2938     event_bits = getFile8Bit(file);
2939     for (j = 32; j < NUM_CHANGE_EVENTS; j++)
2940       if (event_bits & (1 << (j - 32)))
2941         change->has_event[j] = TRUE;
2942   }
2943
2944   // mark this custom element as modified
2945   ei->modified_settings = TRUE;
2946
2947   level->file_has_custom_elements = TRUE;
2948
2949   return chunk_size;
2950 }
2951
2952 static int LoadLevel_GRP1(File *file, int chunk_size, struct LevelInfo *level)
2953 {
2954   struct ElementInfo *ei;
2955   struct ElementGroupInfo *group;
2956   int element;
2957   int i;
2958
2959   element = getMappedElement(getFile16BitBE(file));
2960
2961   if (!IS_GROUP_ELEMENT(element))
2962   {
2963     Error(ERR_WARN, "invalid group element number %d", element);
2964
2965     ReadUnusedBytesFromFile(file, chunk_size - 2);
2966     return chunk_size;
2967   }
2968
2969   ei = &element_info[element];
2970
2971   for (i = 0; i < MAX_ELEMENT_NAME_LEN; i++)
2972     ei->description[i] = getFile8Bit(file);
2973   ei->description[MAX_ELEMENT_NAME_LEN] = 0;
2974
2975   group = element_info[element].group;
2976
2977   group->num_elements = getFile8Bit(file);
2978
2979   ei->use_gfx_element = getFile8Bit(file);
2980   ei->gfx_element_initial = getMappedElement(getFile16BitBE(file));
2981
2982   group->choice_mode = getFile8Bit(file);
2983
2984   // some free bytes for future values and padding
2985   ReadUnusedBytesFromFile(file, 3);
2986
2987   for (i = 0; i < MAX_ELEMENTS_IN_GROUP; i++)
2988     group->element[i] = getMappedElement(getFile16BitBE(file));
2989
2990   // mark this group element as modified
2991   element_info[element].modified_settings = TRUE;
2992
2993   level->file_has_custom_elements = TRUE;
2994
2995   return chunk_size;
2996 }
2997
2998 static int LoadLevel_MicroChunk(File *file, struct LevelFileConfigInfo *conf,
2999                                 int element, int real_element)
3000 {
3001   int micro_chunk_size = 0;
3002   int conf_type = getFile8Bit(file);
3003   int byte_mask = conf_type & CONF_MASK_BYTES;
3004   boolean element_found = FALSE;
3005   int i;
3006
3007   micro_chunk_size += 1;
3008
3009   if (byte_mask == CONF_MASK_MULTI_BYTES)
3010   {
3011     int num_bytes = getFile16BitBE(file);
3012     byte *buffer = checked_malloc(num_bytes);
3013
3014     ReadBytesFromFile(file, buffer, num_bytes);
3015
3016     for (i = 0; conf[i].data_type != -1; i++)
3017     {
3018       if (conf[i].element == element &&
3019           conf[i].conf_type == conf_type)
3020       {
3021         int data_type = conf[i].data_type;
3022         int num_entities = num_bytes / CONF_ENTITY_NUM_BYTES(data_type);
3023         int max_num_entities = conf[i].max_num_entities;
3024
3025         if (num_entities > max_num_entities)
3026         {
3027           Error(ERR_WARN,
3028                 "truncating number of entities for element %d from %d to %d",
3029                 element, num_entities, max_num_entities);
3030
3031           num_entities = max_num_entities;
3032         }
3033
3034         if (num_entities == 0 && (data_type == TYPE_ELEMENT_LIST ||
3035                                   data_type == TYPE_CONTENT_LIST))
3036         {
3037           // for element and content lists, zero entities are not allowed
3038           Error(ERR_WARN, "found empty list of entities for element %d",
3039                 element);
3040
3041           // do not set "num_entities" here to prevent reading behind buffer
3042
3043           *(int *)(conf[i].num_entities) = 1;   // at least one is required
3044         }
3045         else
3046         {
3047           *(int *)(conf[i].num_entities) = num_entities;
3048         }
3049
3050         element_found = TRUE;
3051
3052         if (data_type == TYPE_STRING)
3053         {
3054           char *string = (char *)(conf[i].value);
3055           int j;
3056
3057           for (j = 0; j < max_num_entities; j++)
3058             string[j] = (j < num_entities ? buffer[j] : '\0');
3059         }
3060         else if (data_type == TYPE_ELEMENT_LIST)
3061         {
3062           int *element_array = (int *)(conf[i].value);
3063           int j;
3064
3065           for (j = 0; j < num_entities; j++)
3066             element_array[j] =
3067               getMappedElement(CONF_ELEMENTS_ELEMENT(buffer, j));
3068         }
3069         else if (data_type == TYPE_CONTENT_LIST)
3070         {
3071           struct Content *content= (struct Content *)(conf[i].value);
3072           int c, x, y;
3073
3074           for (c = 0; c < num_entities; c++)
3075             for (y = 0; y < 3; y++)
3076               for (x = 0; x < 3; x++)
3077                 content[c].e[x][y] =
3078                   getMappedElement(CONF_CONTENTS_ELEMENT(buffer, c, x, y));
3079         }
3080         else
3081           element_found = FALSE;
3082
3083         break;
3084       }
3085     }
3086
3087     checked_free(buffer);
3088
3089     micro_chunk_size += 2 + num_bytes;
3090   }
3091   else          // constant size configuration data (1, 2 or 4 bytes)
3092   {
3093     int value = (byte_mask == CONF_MASK_1_BYTE ? getFile8Bit   (file) :
3094                  byte_mask == CONF_MASK_2_BYTE ? getFile16BitBE(file) :
3095                  byte_mask == CONF_MASK_4_BYTE ? getFile32BitBE(file) : 0);
3096
3097     for (i = 0; conf[i].data_type != -1; i++)
3098     {
3099       if (conf[i].element == element &&
3100           conf[i].conf_type == conf_type)
3101       {
3102         int data_type = conf[i].data_type;
3103
3104         if (data_type == TYPE_ELEMENT)
3105           value = getMappedElement(value);
3106
3107         if (data_type == TYPE_BOOLEAN)
3108           *(boolean *)(conf[i].value) = value;
3109         else
3110           *(int *)    (conf[i].value) = value;
3111
3112         element_found = TRUE;
3113
3114         break;
3115       }
3116     }
3117
3118     micro_chunk_size += CONF_VALUE_NUM_BYTES(byte_mask);
3119   }
3120
3121   if (!element_found)
3122   {
3123     char *error_conf_chunk_bytes =
3124       (byte_mask == CONF_MASK_1_BYTE ? "CONF_VALUE_8_BIT" :
3125        byte_mask == CONF_MASK_2_BYTE ? "CONF_VALUE_16_BIT" :
3126        byte_mask == CONF_MASK_4_BYTE ? "CONF_VALUE_32_BIT" :"CONF_VALUE_BYTES");
3127     int error_conf_chunk_token = conf_type & CONF_MASK_TOKEN;
3128     int error_element = real_element;
3129
3130     Error(ERR_WARN, "cannot load micro chunk '%s(%d)' value for element %d ['%s']",
3131           error_conf_chunk_bytes, error_conf_chunk_token,
3132           error_element, EL_NAME(error_element));
3133   }
3134
3135   return micro_chunk_size;
3136 }
3137
3138 static int LoadLevel_INFO(File *file, int chunk_size, struct LevelInfo *level)
3139 {
3140   int real_chunk_size = 0;
3141
3142   li = *level;          // copy level data into temporary buffer
3143
3144   while (!checkEndOfFile(file))
3145   {
3146     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_INFO, -1, -1);
3147
3148     if (real_chunk_size >= chunk_size)
3149       break;
3150   }
3151
3152   *level = li;          // copy temporary buffer back to level data
3153
3154   return real_chunk_size;
3155 }
3156
3157 static int LoadLevel_CONF(File *file, int chunk_size, struct LevelInfo *level)
3158 {
3159   int real_chunk_size = 0;
3160
3161   li = *level;          // copy level data into temporary buffer
3162
3163   while (!checkEndOfFile(file))
3164   {
3165     int element = getMappedElement(getFile16BitBE(file));
3166
3167     real_chunk_size += 2;
3168     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_CONF,
3169                                             element, element);
3170     if (real_chunk_size >= chunk_size)
3171       break;
3172   }
3173
3174   *level = li;          // copy temporary buffer back to level data
3175
3176   return real_chunk_size;
3177 }
3178
3179 static int LoadLevel_ELEM(File *file, int chunk_size, struct LevelInfo *level)
3180 {
3181   int real_chunk_size = 0;
3182
3183   li = *level;          // copy level data into temporary buffer
3184
3185   while (!checkEndOfFile(file))
3186   {
3187     int element = getMappedElement(getFile16BitBE(file));
3188
3189     real_chunk_size += 2;
3190     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_ELEM,
3191                                             element, element);
3192     if (real_chunk_size >= chunk_size)
3193       break;
3194   }
3195
3196   *level = li;          // copy temporary buffer back to level data
3197
3198   return real_chunk_size;
3199 }
3200
3201 static int LoadLevel_NOTE(File *file, int chunk_size, struct LevelInfo *level)
3202 {
3203   int element = getMappedElement(getFile16BitBE(file));
3204   int envelope_nr = element - EL_ENVELOPE_1;
3205   int real_chunk_size = 2;
3206
3207   xx_envelope = level->envelope[envelope_nr];   // copy into temporary buffer
3208
3209   while (!checkEndOfFile(file))
3210   {
3211     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_NOTE,
3212                                             -1, element);
3213
3214     if (real_chunk_size >= chunk_size)
3215       break;
3216   }
3217
3218   level->envelope[envelope_nr] = xx_envelope;   // copy from temporary buffer
3219
3220   return real_chunk_size;
3221 }
3222
3223 static int LoadLevel_CUSX(File *file, int chunk_size, struct LevelInfo *level)
3224 {
3225   int element = getMappedElement(getFile16BitBE(file));
3226   int real_chunk_size = 2;
3227   struct ElementInfo *ei = &element_info[element];
3228   int i;
3229
3230   xx_ei = *ei;          // copy element data into temporary buffer
3231
3232   xx_ei.num_change_pages = -1;
3233
3234   while (!checkEndOfFile(file))
3235   {
3236     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_CUSX_base,
3237                                             -1, element);
3238     if (xx_ei.num_change_pages != -1)
3239       break;
3240
3241     if (real_chunk_size >= chunk_size)
3242       break;
3243   }
3244
3245   *ei = xx_ei;
3246
3247   if (ei->num_change_pages == -1)
3248   {
3249     Error(ERR_WARN, "LoadLevel_CUSX(): missing 'num_change_pages' for '%s'",
3250           EL_NAME(element));
3251
3252     ei->num_change_pages = 1;
3253
3254     setElementChangePages(ei, 1);
3255     setElementChangeInfoToDefaults(ei->change);
3256
3257     return real_chunk_size;
3258   }
3259
3260   // initialize number of change pages stored for this custom element
3261   setElementChangePages(ei, ei->num_change_pages);
3262   for (i = 0; i < ei->num_change_pages; i++)
3263     setElementChangeInfoToDefaults(&ei->change_page[i]);
3264
3265   // start with reading properties for the first change page
3266   xx_current_change_page = 0;
3267
3268   while (!checkEndOfFile(file))
3269   {
3270     struct ElementChangeInfo *change = &ei->change_page[xx_current_change_page];
3271
3272     xx_change = *change;        // copy change data into temporary buffer
3273
3274     resetEventBits();           // reset bits; change page might have changed
3275
3276     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_CUSX_change,
3277                                             -1, element);
3278
3279     *change = xx_change;
3280
3281     setEventFlagsFromEventBits(change);
3282
3283     if (real_chunk_size >= chunk_size)
3284       break;
3285   }
3286
3287   level->file_has_custom_elements = TRUE;
3288
3289   return real_chunk_size;
3290 }
3291
3292 static int LoadLevel_GRPX(File *file, int chunk_size, struct LevelInfo *level)
3293 {
3294   int element = getMappedElement(getFile16BitBE(file));
3295   int real_chunk_size = 2;
3296   struct ElementInfo *ei = &element_info[element];
3297   struct ElementGroupInfo *group = ei->group;
3298
3299   xx_ei = *ei;          // copy element data into temporary buffer
3300   xx_group = *group;    // copy group data into temporary buffer
3301
3302   while (!checkEndOfFile(file))
3303   {
3304     real_chunk_size += LoadLevel_MicroChunk(file, chunk_config_GRPX,
3305                                             -1, element);
3306
3307     if (real_chunk_size >= chunk_size)
3308       break;
3309   }
3310
3311   *ei = xx_ei;
3312   *group = xx_group;
3313
3314   level->file_has_custom_elements = TRUE;
3315
3316   return real_chunk_size;
3317 }
3318
3319 static void LoadLevelFromFileInfo_RND(struct LevelInfo *level,
3320                                       struct LevelFileInfo *level_file_info,
3321                                       boolean level_info_only)
3322 {
3323   char *filename = level_file_info->filename;
3324   char cookie[MAX_LINE_LEN];
3325   char chunk_name[CHUNK_ID_LEN + 1];
3326   int chunk_size;
3327   File *file;
3328
3329   if (!(file = openFile(filename, MODE_READ)))
3330   {
3331     level->no_valid_file = TRUE;
3332     level->no_level_file = TRUE;
3333
3334     if (level_info_only)
3335       return;
3336
3337     Error(ERR_WARN, "cannot read level '%s' -- using empty level", filename);
3338
3339     if (!setup.editor.use_template_for_new_levels)
3340       return;
3341
3342     // if level file not found, try to initialize level data from template
3343     filename = getGlobalLevelTemplateFilename();
3344
3345     if (!(file = openFile(filename, MODE_READ)))
3346       return;
3347
3348     // default: for empty levels, use level template for custom elements
3349     level->use_custom_template = TRUE;
3350
3351     level->no_valid_file = FALSE;
3352   }
3353
3354   getFileChunkBE(file, chunk_name, NULL);
3355   if (strEqual(chunk_name, "RND1"))
3356   {
3357     getFile32BitBE(file);               // not used
3358
3359     getFileChunkBE(file, chunk_name, NULL);
3360     if (!strEqual(chunk_name, "CAVE"))
3361     {
3362       level->no_valid_file = TRUE;
3363
3364       Error(ERR_WARN, "unknown format of level file '%s'", filename);
3365
3366       closeFile(file);
3367
3368       return;
3369     }
3370   }
3371   else  // check for pre-2.0 file format with cookie string
3372   {
3373     strcpy(cookie, chunk_name);
3374     if (getStringFromFile(file, &cookie[4], MAX_LINE_LEN - 4) == NULL)
3375       cookie[4] = '\0';
3376     if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
3377       cookie[strlen(cookie) - 1] = '\0';
3378
3379     if (!checkCookieString(cookie, LEVEL_COOKIE_TMPL))
3380     {
3381       level->no_valid_file = TRUE;
3382
3383       Error(ERR_WARN, "unknown format of level file '%s'", filename);
3384
3385       closeFile(file);
3386
3387       return;
3388     }
3389
3390     if ((level->file_version = getFileVersionFromCookieString(cookie)) == -1)
3391     {
3392       level->no_valid_file = TRUE;
3393
3394       Error(ERR_WARN, "unsupported version of level file '%s'", filename);
3395
3396       closeFile(file);
3397
3398       return;
3399     }
3400
3401     // pre-2.0 level files have no game version, so use file version here
3402     level->game_version = level->file_version;
3403   }
3404
3405   if (level->file_version < FILE_VERSION_1_2)
3406   {
3407     // level files from versions before 1.2.0 without chunk structure
3408     LoadLevel_HEAD(file, LEVEL_CHUNK_HEAD_SIZE,         level);
3409     LoadLevel_BODY(file, level->fieldx * level->fieldy, level);
3410   }
3411   else
3412   {
3413     static struct
3414     {
3415       char *name;
3416       int size;
3417       int (*loader)(File *, int, struct LevelInfo *);
3418     }
3419     chunk_info[] =
3420     {
3421       { "VERS", LEVEL_CHUNK_VERS_SIZE,  LoadLevel_VERS },
3422       { "DATE", LEVEL_CHUNK_DATE_SIZE,  LoadLevel_DATE },
3423       { "HEAD", LEVEL_CHUNK_HEAD_SIZE,  LoadLevel_HEAD },
3424       { "NAME", LEVEL_CHUNK_NAME_SIZE,  LoadLevel_NAME },
3425       { "AUTH", LEVEL_CHUNK_AUTH_SIZE,  LoadLevel_AUTH },
3426       { "INFO", -1,                     LoadLevel_INFO },
3427       { "BODY", -1,                     LoadLevel_BODY },
3428       { "CONT", -1,                     LoadLevel_CONT },
3429       { "CNT2", LEVEL_CHUNK_CNT2_SIZE,  LoadLevel_CNT2 },
3430       { "CNT3", -1,                     LoadLevel_CNT3 },
3431       { "CUS1", -1,                     LoadLevel_CUS1 },
3432       { "CUS2", -1,                     LoadLevel_CUS2 },
3433       { "CUS3", -1,                     LoadLevel_CUS3 },
3434       { "CUS4", -1,                     LoadLevel_CUS4 },
3435       { "GRP1", -1,                     LoadLevel_GRP1 },
3436       { "CONF", -1,                     LoadLevel_CONF },
3437       { "ELEM", -1,                     LoadLevel_ELEM },
3438       { "NOTE", -1,                     LoadLevel_NOTE },
3439       { "CUSX", -1,                     LoadLevel_CUSX },
3440       { "GRPX", -1,                     LoadLevel_GRPX },
3441
3442       {  NULL,  0,                      NULL }
3443     };
3444
3445     while (getFileChunkBE(file, chunk_name, &chunk_size))
3446     {
3447       int i = 0;
3448
3449       while (chunk_info[i].name != NULL &&
3450              !strEqual(chunk_name, chunk_info[i].name))
3451         i++;
3452
3453       if (chunk_info[i].name == NULL)
3454       {
3455         Error(ERR_WARN, "unknown chunk '%s' in level file '%s'",
3456               chunk_name, filename);
3457         ReadUnusedBytesFromFile(file, chunk_size);
3458       }
3459       else if (chunk_info[i].size != -1 &&
3460                chunk_info[i].size != chunk_size)
3461       {
3462         Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
3463               chunk_size, chunk_name, filename);
3464         ReadUnusedBytesFromFile(file, chunk_size);
3465       }
3466       else
3467       {
3468         // call function to load this level chunk
3469         int chunk_size_expected =
3470           (chunk_info[i].loader)(file, chunk_size, level);
3471
3472         // the size of some chunks cannot be checked before reading other
3473         // chunks first (like "HEAD" and "BODY") that contain some header
3474         // information, so check them here
3475         if (chunk_size_expected != chunk_size)
3476         {
3477           Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
3478                 chunk_size, chunk_name, filename);
3479         }
3480       }
3481     }
3482   }
3483
3484   closeFile(file);
3485 }
3486
3487
3488 // ----------------------------------------------------------------------------
3489 // functions for loading EM level
3490 // ----------------------------------------------------------------------------
3491
3492 static void CopyNativeLevel_RND_to_EM(struct LevelInfo *level)
3493 {
3494   static int ball_xy[8][2] =
3495   {
3496     { 0, 0 },
3497     { 1, 0 },
3498     { 2, 0 },
3499     { 0, 1 },
3500     { 2, 1 },
3501     { 0, 2 },
3502     { 1, 2 },
3503     { 2, 2 },
3504   };
3505   struct LevelInfo_EM *level_em = level->native_em_level;
3506   struct LEVEL *lev = level_em->lev;
3507   struct PLAYER **ply = level_em->ply;
3508   int i, j, x, y;
3509
3510   lev->width  = MIN(level->fieldx, EM_MAX_CAVE_WIDTH);
3511   lev->height = MIN(level->fieldy, EM_MAX_CAVE_HEIGHT);
3512
3513   lev->time_seconds     = level->time;
3514   lev->required_initial = level->gems_needed;
3515
3516   lev->emerald_score    = level->score[SC_EMERALD];
3517   lev->diamond_score    = level->score[SC_DIAMOND];
3518   lev->alien_score      = level->score[SC_ROBOT];
3519   lev->tank_score       = level->score[SC_SPACESHIP];
3520   lev->bug_score        = level->score[SC_BUG];
3521   lev->eater_score      = level->score[SC_YAMYAM];
3522   lev->nut_score        = level->score[SC_NUT];
3523   lev->dynamite_score   = level->score[SC_DYNAMITE];
3524   lev->key_score        = level->score[SC_KEY];
3525   lev->exit_score       = level->score[SC_TIME_BONUS];
3526
3527   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
3528     for (y = 0; y < 3; y++)
3529       for (x = 0; x < 3; x++)
3530         lev->eater_array[i][y * 3 + x] =
3531           map_element_RND_to_EM(level->yamyam_content[i].e[x][y]);
3532
3533   lev->amoeba_time              = level->amoeba_speed;
3534   lev->wonderwall_time_initial  = level->time_magic_wall;
3535   lev->wheel_time               = level->time_wheel;
3536
3537   lev->android_move_time        = level->android_move_time;
3538   lev->android_clone_time       = level->android_clone_time;
3539   lev->ball_random              = level->ball_random;
3540   lev->ball_state_initial       = level->ball_state_initial;
3541   lev->ball_time                = level->ball_time;
3542   lev->num_ball_arrays          = level->num_ball_contents;
3543
3544   lev->lenses_score             = level->lenses_score;
3545   lev->magnify_score            = level->magnify_score;
3546   lev->slurp_score              = level->slurp_score;
3547
3548   lev->lenses_time              = level->lenses_time;
3549   lev->magnify_time             = level->magnify_time;
3550
3551   lev->wind_direction_initial =
3552     map_direction_RND_to_EM(level->wind_direction_initial);
3553   lev->wind_cnt_initial = (level->wind_direction_initial != MV_NONE ?
3554                            lev->wind_time : 0);
3555
3556   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
3557     for (j = 0; j < 8; j++)
3558       lev->ball_array[i][j] =
3559         map_element_RND_to_EM(level->
3560                               ball_content[i].e[ball_xy[j][0]][ball_xy[j][1]]);
3561
3562   map_android_clone_elements_RND_to_EM(level);
3563
3564   // first fill the complete playfield with the default border element
3565   for (y = 0; y < EM_MAX_CAVE_HEIGHT; y++)
3566     for (x = 0; x < EM_MAX_CAVE_WIDTH; x++)
3567       level_em->cave[x][y] = ZBORDER;
3568
3569   if (BorderElement == EL_STEELWALL)
3570   {
3571     for (y = 0; y < lev->height + 2; y++)
3572       for (x = 0; x < lev->width + 2; x++)
3573         level_em->cave[x + 1][y + 1] = map_element_RND_to_EM(EL_STEELWALL);
3574   }
3575
3576   // then copy the real level contents from level file into the playfield
3577   for (y = 0; y < lev->height; y++) for (x = 0; x < lev->width; x++)
3578   {
3579     int new_element = map_element_RND_to_EM(level->field[x][y]);
3580     int offset = (BorderElement == EL_STEELWALL ? 1 : 0);
3581     int xx = x + 1 + offset;
3582     int yy = y + 1 + offset;
3583
3584     if (level->field[x][y] == EL_AMOEBA_DEAD)
3585       new_element = map_element_RND_to_EM(EL_AMOEBA_WET);
3586
3587     level_em->cave[xx][yy] = new_element;
3588   }
3589
3590   for (i = 0; i < MAX_PLAYERS; i++)
3591   {
3592     ply[i]->x_initial = 0;
3593     ply[i]->y_initial = 0;
3594   }
3595
3596   // initialize player positions and delete players from the playfield
3597   for (y = 0; y < lev->height; y++) for (x = 0; x < lev->width; x++)
3598   {
3599     if (ELEM_IS_PLAYER(level->field[x][y]))
3600     {
3601       int player_nr = GET_PLAYER_NR(level->field[x][y]);
3602       int offset = (BorderElement == EL_STEELWALL ? 1 : 0);
3603       int xx = x + 1 + offset;
3604       int yy = y + 1 + offset;
3605
3606       ply[player_nr]->x_initial = xx;
3607       ply[player_nr]->y_initial = yy;
3608
3609       level_em->cave[xx][yy] = map_element_RND_to_EM(EL_EMPTY);
3610     }
3611   }
3612
3613   if (BorderElement == EL_STEELWALL)
3614   {
3615     lev->width  += 2;
3616     lev->height += 2;
3617   }
3618 }
3619
3620 static void CopyNativeLevel_EM_to_RND(struct LevelInfo *level)
3621 {
3622   static int ball_xy[8][2] =
3623   {
3624     { 0, 0 },
3625     { 1, 0 },
3626     { 2, 0 },
3627     { 0, 1 },
3628     { 2, 1 },
3629     { 0, 2 },
3630     { 1, 2 },
3631     { 2, 2 },
3632   };
3633   struct LevelInfo_EM *level_em = level->native_em_level;
3634   struct LEVEL *lev = level_em->lev;
3635   struct PLAYER **ply = level_em->ply;
3636   int i, j, x, y;
3637
3638   level->fieldx = MIN(lev->width,  MAX_LEV_FIELDX);
3639   level->fieldy = MIN(lev->height, MAX_LEV_FIELDY);
3640
3641   level->time        = lev->time_seconds;
3642   level->gems_needed = lev->required_initial;
3643
3644   sprintf(level->name, "Level %d", level->file_info.nr);
3645
3646   level->score[SC_EMERALD]      = lev->emerald_score;
3647   level->score[SC_DIAMOND]      = lev->diamond_score;
3648   level->score[SC_ROBOT]        = lev->alien_score;
3649   level->score[SC_SPACESHIP]    = lev->tank_score;
3650   level->score[SC_BUG]          = lev->bug_score;
3651   level->score[SC_YAMYAM]       = lev->eater_score;
3652   level->score[SC_NUT]          = lev->nut_score;
3653   level->score[SC_DYNAMITE]     = lev->dynamite_score;
3654   level->score[SC_KEY]          = lev->key_score;
3655   level->score[SC_TIME_BONUS]   = lev->exit_score;
3656
3657   level->num_yamyam_contents = MAX_ELEMENT_CONTENTS;
3658
3659   for (i = 0; i < level->num_yamyam_contents; i++)
3660     for (y = 0; y < 3; y++)
3661       for (x = 0; x < 3; x++)
3662         level->yamyam_content[i].e[x][y] =
3663           map_element_EM_to_RND(lev->eater_array[i][y * 3 + x]);
3664
3665   level->amoeba_speed           = lev->amoeba_time;
3666   level->time_magic_wall        = lev->wonderwall_time_initial;
3667   level->time_wheel             = lev->wheel_time;
3668
3669   level->android_move_time      = lev->android_move_time;
3670   level->android_clone_time     = lev->android_clone_time;
3671   level->ball_random            = lev->ball_random;
3672   level->ball_state_initial     = lev->ball_state_initial;
3673   level->ball_time              = lev->ball_time;
3674   level->num_ball_contents      = lev->num_ball_arrays;
3675
3676   level->lenses_score           = lev->lenses_score;
3677   level->magnify_score          = lev->magnify_score;
3678   level->slurp_score            = lev->slurp_score;
3679
3680   level->lenses_time            = lev->lenses_time;
3681   level->magnify_time           = lev->magnify_time;
3682
3683   level->wind_direction_initial =
3684     map_direction_EM_to_RND(lev->wind_direction_initial);
3685
3686   for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
3687     for (j = 0; j < 8; j++)
3688       level->ball_content[i].e[ball_xy[j][0]][ball_xy[j][1]] =
3689         map_element_EM_to_RND(lev->ball_array[i][j]);
3690
3691   map_android_clone_elements_EM_to_RND(level);
3692
3693   // convert the playfield (some elements need special treatment)
3694   for (y = 0; y < level->fieldy; y++) for (x = 0; x < level->fieldx; x++)
3695   {
3696     int new_element = map_element_EM_to_RND(level_em->cave[x + 1][y + 1]);
3697
3698     if (new_element == EL_AMOEBA_WET && level->amoeba_speed == 0)
3699       new_element = EL_AMOEBA_DEAD;
3700
3701     level->field[x][y] = new_element;
3702   }
3703
3704   for (i = 0; i < MAX_PLAYERS; i++)
3705   {
3706     // in case of all players set to the same field, use the first player
3707     int nr = MAX_PLAYERS - i - 1;
3708     int jx = ply[nr]->x_initial - 1;
3709     int jy = ply[nr]->y_initial - 1;
3710
3711     if (jx != -1 && jy != -1)
3712       level->field[jx][jy] = EL_PLAYER_1 + nr;
3713   }
3714 }
3715
3716
3717 // ----------------------------------------------------------------------------
3718 // functions for loading SP level
3719 // ----------------------------------------------------------------------------
3720
3721 static void CopyNativeLevel_RND_to_SP(struct LevelInfo *level)
3722 {
3723   struct LevelInfo_SP *level_sp = level->native_sp_level;
3724   LevelInfoType *header = &level_sp->header;
3725   int i, x, y;
3726
3727   level_sp->width  = level->fieldx;
3728   level_sp->height = level->fieldy;
3729
3730   for (x = 0; x < level->fieldx; x++)
3731     for (y = 0; y < level->fieldy; y++)
3732       level_sp->playfield[x][y] = map_element_RND_to_SP(level->field[x][y]);
3733
3734   header->InitialGravity = (level->initial_player_gravity[0] ? 1 : 0);
3735