+/* ------------------------------------------------------------------------- */
+/* functions for loading EM level */
+/* ------------------------------------------------------------------------- */
+
+static int map_em_element_yam(int element)
+{
+ switch (element)
+ {
+ case 0x00: return EL_EMPTY;
+ case 0x01: return EL_EMERALD;
+ case 0x02: return EL_DIAMOND;
+ case 0x03: return EL_ROCK;
+ case 0x04: return EL_ROBOT;
+ case 0x05: return EL_SPACESHIP_UP;
+ case 0x06: return EL_BOMB;
+ case 0x07: return EL_BUG_UP;
+ case 0x08: return EL_AMOEBA_DROP;
+ case 0x09: return EL_NUT;
+ case 0x0a: return EL_YAMYAM;
+ case 0x0b: return EL_QUICKSAND_FULL;
+ case 0x0c: return EL_SAND;
+ case 0x0d: return EL_WALL_SLIPPERY;
+ case 0x0e: return EL_STEELWALL;
+ case 0x0f: return EL_WALL;
+ case 0x10: return EL_EM_KEY_1;
+ case 0x11: return EL_EM_KEY_2;
+ case 0x12: return EL_EM_KEY_4;
+ case 0x13: return EL_EM_KEY_3;
+ case 0x14: return EL_MAGIC_WALL;
+ case 0x15: return EL_ROBOT_WHEEL;
+ case 0x16: return EL_DYNAMITE;
+
+ case 0x17: return EL_EM_KEY_1; /* EMC */
+ case 0x18: return EL_BUG_UP; /* EMC */
+ case 0x1a: return EL_DIAMOND; /* EMC */
+ case 0x1b: return EL_EMERALD; /* EMC */
+ case 0x25: return EL_NUT; /* EMC */
+ case 0x80: return EL_EMPTY; /* EMC */
+ case 0x85: return EL_EM_KEY_1; /* EMC */
+ case 0x86: return EL_EM_KEY_2; /* EMC */
+ case 0x87: return EL_EM_KEY_4; /* EMC */
+ case 0x88: return EL_EM_KEY_3; /* EMC */
+ case 0x94: return EL_QUICKSAND_EMPTY; /* EMC */
+ case 0x9a: return EL_AMOEBA_WET; /* EMC */
+ case 0xaf: return EL_DYNAMITE; /* EMC */
+ case 0xbd: return EL_SAND; /* EMC */
+
+ default:
+ Error(ERR_WARN, "invalid level element %d", element);
+ return EL_UNKNOWN;
+ }
+}
+
+static int map_em_element_field(int element)
+{
+ if (element >= 0xc8 && element <= 0xe1)
+ return EL_CHAR_A + (element - 0xc8);
+ else if (element >= 0xe2 && element <= 0xeb)
+ return EL_CHAR_0 + (element - 0xe2);
+
+ switch (element)
+ {
+ case 0x00: return EL_ROCK;
+ case 0x01: return EL_ROCK; /* EMC */
+ case 0x02: return EL_DIAMOND;
+ case 0x03: return EL_DIAMOND;
+ case 0x04: return EL_ROBOT;
+ case 0x05: return EL_ROBOT; /* EMC */
+ case 0x06: return EL_EMPTY_SPACE; /* EMC */
+ case 0x07: return EL_EMPTY_SPACE; /* EMC */
+ case 0x08: return EL_SPACESHIP_UP;
+ case 0x09: return EL_SPACESHIP_RIGHT;
+ case 0x0a: return EL_SPACESHIP_DOWN;
+ case 0x0b: return EL_SPACESHIP_LEFT;
+ case 0x0c: return EL_SPACESHIP_UP;
+ case 0x0d: return EL_SPACESHIP_RIGHT;
+ case 0x0e: return EL_SPACESHIP_DOWN;
+ case 0x0f: return EL_SPACESHIP_LEFT;
+
+ case 0x10: return EL_BOMB;
+ case 0x11: return EL_BOMB; /* EMC */
+ case 0x12: return EL_EMERALD;
+ case 0x13: return EL_EMERALD;
+ case 0x14: return EL_BUG_UP;
+ case 0x15: return EL_BUG_RIGHT;
+ case 0x16: return EL_BUG_DOWN;
+ case 0x17: return EL_BUG_LEFT;
+ case 0x18: return EL_BUG_UP;
+ case 0x19: return EL_BUG_RIGHT;
+ case 0x1a: return EL_BUG_DOWN;
+ case 0x1b: return EL_BUG_LEFT;
+ case 0x1c: return EL_AMOEBA_DROP;
+ case 0x1d: return EL_AMOEBA_DROP; /* EMC */
+ case 0x1e: return EL_AMOEBA_DROP; /* EMC */
+ case 0x1f: return EL_AMOEBA_DROP; /* EMC */
+
+ case 0x20: return EL_ROCK;
+ case 0x21: return EL_BOMB; /* EMC */
+ case 0x22: return EL_DIAMOND; /* EMC */
+ case 0x23: return EL_EMERALD; /* EMC */
+ case 0x24: return EL_MAGIC_WALL;
+ case 0x25: return EL_NUT;
+ case 0x26: return EL_NUT; /* EMC */
+ case 0x27: return EL_NUT; /* EMC */
+
+ /* looks like magic wheel, but is _always_ activated */
+ case 0x28: return EL_ROBOT_WHEEL; /* EMC */
+
+ case 0x29: return EL_YAMYAM; /* up */
+ case 0x2a: return EL_YAMYAM; /* down */
+ case 0x2b: return EL_YAMYAM; /* left */ /* EMC */
+ case 0x2c: return EL_YAMYAM; /* right */ /* EMC */
+ case 0x2d: return EL_QUICKSAND_FULL;
+ case 0x2e: return EL_EMPTY_SPACE; /* EMC */
+ case 0x2f: return EL_EMPTY_SPACE; /* EMC */
+
+ case 0x30: return EL_EMPTY_SPACE; /* EMC */
+ case 0x31: return EL_SAND; /* EMC */
+ case 0x32: return EL_SAND; /* EMC */
+ case 0x33: return EL_SAND; /* EMC */
+ case 0x34: return EL_QUICKSAND_FULL; /* EMC */
+ case 0x35: return EL_QUICKSAND_FULL; /* EMC */
+ case 0x36: return EL_QUICKSAND_FULL; /* EMC */
+ case 0x37: return EL_SAND; /* EMC */
+ case 0x38: return EL_ROCK; /* EMC */
+ case 0x39: return EL_EXPANDABLE_WALL_HORIZONTAL; /* EMC */
+ case 0x3a: return EL_EXPANDABLE_WALL_VERTICAL; /* EMC */
+ case 0x3b: return EL_DYNAMITE_ACTIVE; /* 1 */
+ case 0x3c: return EL_DYNAMITE_ACTIVE; /* 2 */
+ case 0x3d: return EL_DYNAMITE_ACTIVE; /* 3 */
+ case 0x3e: return EL_DYNAMITE_ACTIVE; /* 4 */
+ case 0x3f: return EL_ACID_POOL_BOTTOM;
+
+ case 0x40: return EL_EXIT_OPEN; /* 1 */
+ case 0x41: return EL_EXIT_OPEN; /* 2 */
+ case 0x42: return EL_EXIT_OPEN; /* 3 */
+ case 0x43: return EL_BALLOON; /* EMC */
+ case 0x44: return EL_UNKNOWN; /* EMC ("plant") */
+ case 0x45: return EL_SPRING; /* EMC */
+ case 0x46: return EL_SPRING; /* falling */ /* EMC */
+ case 0x47: return EL_SPRING; /* left */ /* EMC */
+ case 0x48: return EL_SPRING; /* right */ /* EMC */
+ case 0x49: return EL_UNKNOWN; /* EMC ("ball 1") */
+ case 0x4a: return EL_UNKNOWN; /* EMC ("ball 2") */
+ case 0x4b: return EL_UNKNOWN; /* EMC ("android") */
+ case 0x4c: return EL_EMPTY_SPACE; /* EMC */
+ case 0x4d: return EL_UNKNOWN; /* EMC ("android") */
+ case 0x4e: return EL_INVISIBLE_WALL; /* EMC (? "android") */
+ case 0x4f: return EL_UNKNOWN; /* EMC ("android") */
+
+ case 0x50: return EL_UNKNOWN; /* EMC ("android") */
+ case 0x51: return EL_UNKNOWN; /* EMC ("android") */
+ case 0x52: return EL_UNKNOWN; /* EMC ("android") */
+ case 0x53: return EL_UNKNOWN; /* EMC ("android") */
+ case 0x54: return EL_UNKNOWN; /* EMC ("android") */
+ case 0x55: return EL_EMPTY_SPACE; /* EMC */
+ case 0x56: return EL_EMPTY_SPACE; /* EMC */
+ case 0x57: return EL_EMPTY_SPACE; /* EMC */
+ case 0x58: return EL_EMPTY_SPACE; /* EMC */
+ case 0x59: return EL_EMPTY_SPACE; /* EMC */
+ case 0x5a: return EL_EMPTY_SPACE; /* EMC */
+ case 0x5b: return EL_EMPTY_SPACE; /* EMC */
+ case 0x5c: return EL_EMPTY_SPACE; /* EMC */
+ case 0x5d: return EL_EMPTY_SPACE; /* EMC */
+ case 0x5e: return EL_EMPTY_SPACE; /* EMC */
+ case 0x5f: return EL_EMPTY_SPACE; /* EMC */
+
+ case 0x60: return EL_EMPTY_SPACE; /* EMC */
+ case 0x61: return EL_EMPTY_SPACE; /* EMC */
+ case 0x62: return EL_EMPTY_SPACE; /* EMC */
+ case 0x63: return EL_SPRING; /* left */ /* EMC */
+ case 0x64: return EL_SPRING; /* right */ /* EMC */
+ case 0x65: return EL_ACID; /* 1 */ /* EMC */
+ case 0x66: return EL_ACID; /* 2 */ /* EMC */
+ case 0x67: return EL_ACID; /* 3 */ /* EMC */
+ case 0x68: return EL_ACID; /* 4 */ /* EMC */
+ case 0x69: return EL_ACID; /* 5 */ /* EMC */
+ case 0x6a: return EL_ACID; /* 6 */ /* EMC */
+ case 0x6b: return EL_ACID; /* 7 */ /* EMC */
+ case 0x6c: return EL_ACID; /* 8 */ /* EMC */
+ case 0x6d: return EL_EMPTY_SPACE; /* EMC */
+ case 0x6e: return EL_EMPTY_SPACE; /* EMC */
+ case 0x6f: return EL_EMPTY_SPACE; /* EMC */
+
+ case 0x70: return EL_EMPTY_SPACE; /* EMC */
+ case 0x71: return EL_EMPTY_SPACE; /* EMC */
+ case 0x72: return EL_NUT; /* left */ /* EMC */
+ case 0x73: return EL_SAND; /* EMC (? "nut") */
+ case 0x74: return EL_STEELWALL;
+ case 0x75: return EL_EMPTY_SPACE; /* EMC */
+ case 0x76: return EL_EMPTY_SPACE; /* EMC */
+ case 0x77: return EL_BOMB; /* left */ /* EMC */
+ case 0x78: return EL_BOMB; /* right */ /* EMC */
+ case 0x79: return EL_ROCK; /* left */ /* EMC */
+ case 0x7a: return EL_ROCK; /* right */ /* EMC */
+ case 0x7b: return EL_ACID; /* (? EMC "blank") */
+ case 0x7c: return EL_EMPTY_SPACE; /* EMC */
+ case 0x7d: return EL_EMPTY_SPACE; /* EMC */
+ case 0x7e: return EL_EMPTY_SPACE; /* EMC */
+ case 0x7f: return EL_EMPTY_SPACE; /* EMC */
+
+ case 0x80: return EL_EMPTY;
+ case 0x81: return EL_WALL_SLIPPERY;
+ case 0x82: return EL_SAND;
+ case 0x83: return EL_STEELWALL;
+ case 0x84: return EL_WALL;
+ case 0x85: return EL_EM_KEY_1;
+ case 0x86: return EL_EM_KEY_2;
+ case 0x87: return EL_EM_KEY_4;
+ case 0x88: return EL_EM_KEY_3;
+ case 0x89: return EL_EM_GATE_1;
+ case 0x8a: return EL_EM_GATE_2;
+ case 0x8b: return EL_EM_GATE_4;
+ case 0x8c: return EL_EM_GATE_3;
+ case 0x8d: return EL_INVISIBLE_WALL; /* EMC (? "dripper") */
+ case 0x8e: return EL_EM_GATE_1_GRAY;
+ case 0x8f: return EL_EM_GATE_2_GRAY;
+
+ case 0x90: return EL_EM_GATE_4_GRAY;
+ case 0x91: return EL_EM_GATE_3_GRAY;
+ case 0x92: return EL_MAGIC_WALL;
+ case 0x93: return EL_ROBOT_WHEEL;
+ case 0x94: return EL_QUICKSAND_EMPTY; /* (? EMC "sand") */
+ case 0x95: return EL_ACID_POOL_TOPLEFT;
+ case 0x96: return EL_ACID_POOL_TOPRIGHT;
+ case 0x97: return EL_ACID_POOL_BOTTOMLEFT;
+ case 0x98: return EL_ACID_POOL_BOTTOMRIGHT;
+ case 0x99: return EL_ACID; /* (? EMC "fake blank") */
+ case 0x9a: return EL_AMOEBA_DEAD; /* 1 */
+ case 0x9b: return EL_AMOEBA_DEAD; /* 2 */
+ case 0x9c: return EL_AMOEBA_DEAD; /* 3 */
+ case 0x9d: return EL_AMOEBA_DEAD; /* 4 */
+ case 0x9e: return EL_EXIT_CLOSED;
+ case 0x9f: return EL_CHAR_LESS; /* arrow left */
+
+ /* looks like normal sand, but behaves like wall */
+ case 0xa0: return EL_UNKNOWN; /* EMC ("fake grass") */
+ case 0xa1: return EL_UNKNOWN; /* EMC ("lenses") */
+ case 0xa2: return EL_UNKNOWN; /* EMC ("magnify") */
+ case 0xa3: return EL_UNKNOWN; /* EMC ("fake blank") */
+ case 0xa4: return EL_UNKNOWN; /* EMC ("fake grass") */
+ case 0xa5: return EL_UNKNOWN; /* EMC ("switch") */
+ case 0xa6: return EL_UNKNOWN; /* EMC ("switch") */
+ case 0xa7: return EL_EMPTY_SPACE; /* EMC */
+ case 0xa8: return EL_EMC_WALL_1; /* EMC ("decor 8") */
+ case 0xa9: return EL_EMC_WALL_2; /* EMC ("decor 9") */
+ case 0xaa: return EL_EMC_WALL_3; /* EMC ("decor 10") */
+ case 0xab: return EL_EMC_WALL_7; /* EMC ("decor 5") */
+ case 0xac: return EL_CHAR_COMMA; /* EMC */
+ case 0xad: return EL_CHAR_QUOTEDBL; /* EMC */
+ case 0xae: return EL_CHAR_MINUS; /* EMC */
+ case 0xaf: return EL_DYNAMITE;
+
+ case 0xb0: return EL_EMC_STEELWALL_1; /* EMC ("steel 3") */
+ case 0xb1: return EL_EMC_WALL_8; /* EMC ("decor 6") */
+ case 0xb2: return EL_UNKNOWN; /* EMC ("decor 7") */
+ case 0xb3: return EL_STEELWALL; /* 2 */ /* EMC */
+ case 0xb4: return EL_WALL_SLIPPERY; /* 2 */ /* EMC */
+ case 0xb5: return EL_EMC_WALL_6; /* EMC ("decor 2") */
+ case 0xb6: return EL_EMC_WALL_5; /* EMC ("decor 4") */
+ case 0xb7: return EL_EMC_WALL_4; /* EMC ("decor 3") */
+ case 0xb8: return EL_BALLOON_SWITCH_ANY; /* EMC */
+ case 0xb9: return EL_BALLOON_SWITCH_RIGHT; /* EMC */
+ case 0xba: return EL_BALLOON_SWITCH_DOWN; /* EMC */
+ case 0xbb: return EL_BALLOON_SWITCH_LEFT; /* EMC */
+ case 0xbc: return EL_BALLOON_SWITCH_UP; /* EMC */
+ case 0xbd: return EL_SAND; /* EMC ("dirt") */
+ case 0xbe: return EL_UNKNOWN; /* EMC ("plant") */
+ case 0xbf: return EL_UNKNOWN; /* EMC ("key 5") */
+
+ case 0xc0: return EL_UNKNOWN; /* EMC ("key 6") */
+ case 0xc1: return EL_UNKNOWN; /* EMC ("key 7") */
+ case 0xc2: return EL_UNKNOWN; /* EMC ("key 8") */
+ case 0xc3: return EL_UNKNOWN; /* EMC ("door 5") */
+ case 0xc4: return EL_UNKNOWN; /* EMC ("door 6") */
+ case 0xc5: return EL_UNKNOWN; /* EMC ("door 7") */
+ case 0xc6: return EL_UNKNOWN; /* EMC ("door 8") */
+ case 0xc7: return EL_UNKNOWN; /* EMC ("bumper") */
+
+ /* characters: see above */
+
+ case 0xec: return EL_CHAR_PERIOD;
+ case 0xed: return EL_CHAR_EXCLAM;
+ case 0xee: return EL_CHAR_COLON;
+ case 0xef: return EL_CHAR_QUESTION;
+
+ case 0xf0: return EL_CHAR_GREATER; /* arrow right */
+ case 0xf1: return EL_CHAR_COPYRIGHT; /* EMC: "decor 1" */
+ case 0xf2: return EL_UNKNOWN; /* EMC ("fake door 5") */
+ case 0xf3: return EL_UNKNOWN; /* EMC ("fake door 6") */
+ case 0xf4: return EL_UNKNOWN; /* EMC ("fake door 7") */
+ case 0xf5: return EL_UNKNOWN; /* EMC ("fake door 8") */
+ case 0xf6: return EL_EMPTY_SPACE; /* EMC */
+ case 0xf7: return EL_EMPTY_SPACE; /* EMC */
+
+ case 0xf8: return EL_EMPTY_SPACE; /* EMC */
+ case 0xf9: return EL_EMPTY_SPACE; /* EMC */
+ case 0xfa: return EL_EMPTY_SPACE; /* EMC */
+ case 0xfb: return EL_EMPTY_SPACE; /* EMC */
+ case 0xfc: return EL_EMPTY_SPACE; /* EMC */
+ case 0xfd: return EL_EMPTY_SPACE; /* EMC */
+
+ case 0xfe: return EL_PLAYER_1; /* EMC: "blank" */
+ case 0xff: return EL_PLAYER_2; /* EMC: "blank" */
+
+ default:
+ /* should never happen (all 8-bit value cases should be handled) */
+ Error(ERR_WARN, "invalid level element %d", element);
+ return EL_UNKNOWN;
+ }
+}
+
+#define EM_LEVEL_SIZE 2106
+#define EM_LEVEL_XSIZE 64
+#define EM_LEVEL_YSIZE 32
+
+static void LoadLevelFromFileInfo_EM(struct LevelInfo *level,
+ struct LevelFileInfo *level_file_info)
+{
+ char *filename = level_file_info->filename;
+ FILE *file;
+ unsigned char leveldata[EM_LEVEL_SIZE];
+ unsigned char *header = &leveldata[EM_LEVEL_XSIZE * EM_LEVEL_YSIZE];
+ unsigned char code0 = 0x65;
+ unsigned char code1 = 0x11;
+ boolean level_is_crypted = FALSE;
+ int nr = level_file_info->nr;
+ int i, x, y;
+
+ if (!(file = fopen(filename, MODE_READ)))
+ {
+ level->no_valid_file = TRUE;
+
+ Error(ERR_WARN, "cannot read level '%s' -- using empty level", filename);
+
+ return;
+ }
+
+ for(i = 0; i < EM_LEVEL_SIZE; i++)
+ leveldata[i] = fgetc(file);
+
+ fclose(file);
+
+ /* check if level data is crypted by testing against known starting bytes
+ of the few existing crypted level files (from Emerald Mine 1 + 2) */
+
+ if ((leveldata[0] == 0xf1 ||
+ leveldata[0] == 0xf5) && leveldata[2] == 0xe7 && leveldata[3] == 0xee)
+ {
+ level_is_crypted = TRUE;
+
+ if (leveldata[0] == 0xf5) /* error in crypted Emerald Mine 2 levels */
+ leveldata[0] = 0xf1;
+ }
+
+ if (level_is_crypted) /* decode crypted level data */
+ {
+ for(i = 0; i < EM_LEVEL_SIZE; i++)
+ {
+ leveldata[i] ^= code0;
+ leveldata[i] -= code1;
+
+ code0 = (code0 + 7) & 0xff;
+ }
+ }
+
+ level->fieldx = EM_LEVEL_XSIZE;
+ level->fieldy = EM_LEVEL_YSIZE;
+
+ level->time = header[46] * 10;
+ level->gems_needed = header[47];
+
+ /* The original Emerald Mine levels have their level number stored
+ at the second byte of the level file...
+ Do not trust this information at other level files, e.g. EMC,
+ but correct it anyway (normally the first row is completely
+ steel wall, so the correction does not hurt anyway). */
+
+ if (leveldata[1] == nr)
+ leveldata[1] = leveldata[2]; /* correct level number field */
+
+ sprintf(level->name, "Level %d", nr); /* set level name */
+
+ level->score[SC_EMERALD] = header[36];
+ level->score[SC_DIAMOND] = header[37];
+ level->score[SC_ROBOT] = header[38];
+ level->score[SC_SPACESHIP] = header[39];
+ level->score[SC_BUG] = header[40];
+ level->score[SC_YAMYAM] = header[41];
+ level->score[SC_NUT] = header[42];
+ level->score[SC_DYNAMITE] = header[43];
+ level->score[SC_TIME_BONUS] = header[44];
+
+ level->num_yamyam_contents = 4;
+
+ for(i = 0; i < level->num_yamyam_contents; i++)
+ for(y = 0; y < 3; y++)
+ for(x = 0; x < 3; x++)
+ level->yamyam_content[i][x][y] =
+ map_em_element_yam(header[i * 9 + y * 3 + x]);
+
+ level->amoeba_speed = (header[52] * 256 + header[53]) % 256;
+ level->time_magic_wall = (header[54] * 256 + header[55]) * 16 / 100;
+ level->time_wheel = (header[56] * 256 + header[57]) * 16 / 100;
+ level->amoeba_content = EL_DIAMOND;
+
+ for (y = 0; y < level->fieldy; y++) for (x = 0; x < level->fieldx; x++)
+ {
+ int new_element = map_em_element_field(leveldata[y * EM_LEVEL_XSIZE + x]);
+
+ if (new_element == EL_AMOEBA_DEAD && level->amoeba_speed)
+ new_element = EL_AMOEBA_WET;
+
+ level->field[x][y] = new_element;
+ }
+
+ x = (header[48] * 256 + header[49]) % EM_LEVEL_XSIZE;
+ y = (header[48] * 256 + header[49]) / EM_LEVEL_XSIZE;
+ level->field[x][y] = EL_PLAYER_1;
+
+ x = (header[50] * 256 + header[51]) % EM_LEVEL_XSIZE;
+ y = (header[50] * 256 + header[51]) / EM_LEVEL_XSIZE;
+ level->field[x][y] = EL_PLAYER_2;
+}
+
+/* ------------------------------------------------------------------------- */
+/* functions for loading SP level */
+/* ------------------------------------------------------------------------- */
+
+#define NUM_SUPAPLEX_LEVELS_PER_PACKAGE 111
+#define SP_LEVEL_SIZE 1536
+#define SP_LEVEL_XSIZE 60
+#define SP_LEVEL_YSIZE 24
+#define SP_LEVEL_NAME_LEN 23
+
+static void LoadLevelFromFileStream_SP(FILE *file, struct LevelInfo *level,
+ int nr)
+{
+ int num_special_ports;
+ int i, x, y;
+
+ /* for details of the Supaplex level format, see Herman Perk's Supaplex
+ documentation file "SPFIX63.DOC" from his Supaplex "SpeedFix" package */
+
+ /* read level body (width * height == 60 * 24 tiles == 1440 bytes) */
+ for (y = 0; y < SP_LEVEL_YSIZE; y++)
+ {
+ for (x = 0; x < SP_LEVEL_XSIZE; x++)
+ {
+ int element_old = fgetc(file);
+ int element_new;
+
+ if (element_old <= 0x27)
+ element_new = getMappedElement(EL_SP_START + element_old);
+ else if (element_old == 0x28)
+ element_new = EL_INVISIBLE_WALL;
+ else
+ {
+ Error(ERR_WARN, "in level %d, at position %d, %d:", nr, x, y);
+ Error(ERR_WARN, "invalid level element %d", element_old);
+
+ element_new = EL_UNKNOWN;
+ }
+
+ level->field[x][y] = element_new;
+ }
+ }
+
+ ReadUnusedBytesFromFile(file, 4); /* (not used by Supaplex engine) */
+
+ /* initial gravity: 1 == "on", anything else (0) == "off" */
+ level->initial_gravity = (fgetc(file) == 1 ? TRUE : FALSE);
+
+ ReadUnusedBytesFromFile(file, 1); /* (not used by Supaplex engine) */
+
+ /* level title in uppercase letters, padded with dashes ("-") (23 bytes) */
+ for (i = 0; i < SP_LEVEL_NAME_LEN; i++)
+ level->name[i] = fgetc(file);
+ level->name[SP_LEVEL_NAME_LEN] = '\0';
+
+ /* initial "freeze zonks": 2 == "on", anything else (0, 1) == "off" */
+ ReadUnusedBytesFromFile(file, 1); /* (not used by R'n'D engine) */
+
+ /* number of infotrons needed; 0 means that Supaplex will count the total
+ amount of infotrons in the level and use the low byte of that number
+ (a multiple of 256 infotrons will result in "0 infotrons needed"!) */
+ level->gems_needed = fgetc(file);
+
+ /* number of special ("gravity") port entries below (maximum 10 allowed) */
+ num_special_ports = fgetc(file);
+
+ /* database of properties of up to 10 special ports (6 bytes per port) */
+ for (i = 0; i < 10; i++)
+ {
+ int port_location, port_x, port_y, port_element;
+ int gravity;
+
+ /* high and low byte of the location of a special port; if (x, y) are the
+ coordinates of a port in the field and (0, 0) is the top-left corner,
+ the 16 bit value here calculates as 2 * (x + (y * 60)) (this is twice
+ of what may be expected: Supaplex works with a game field in memory
+ which is 2 bytes per tile) */
+ port_location = getFile16BitBE(file);
+
+ /* change gravity: 1 == "turn on", anything else (0) == "turn off" */
+ gravity = fgetc(file);
+
+ /* "freeze zonks": 2 == "turn on", anything else (0, 1) == "turn off" */
+ ReadUnusedBytesFromFile(file, 1); /* (not used by R'n'D engine) */
+
+ /* "freeze enemies": 1 == "turn on", anything else (0) == "turn off" */
+ ReadUnusedBytesFromFile(file, 1); /* (not used by R'n'D engine) */
+
+ ReadUnusedBytesFromFile(file, 1); /* (not used by Supaplex engine) */
+
+ if (i >= num_special_ports)
+ continue;
+
+ port_x = (port_location / 2) % SP_LEVEL_XSIZE;
+ port_y = (port_location / 2) / SP_LEVEL_XSIZE;
+
+ if (port_x < 0 || port_x >= SP_LEVEL_XSIZE ||
+ port_y < 0 || port_y >= SP_LEVEL_YSIZE)
+ {
+ Error(ERR_WARN, "special port position (%d, %d) out of bounds",
+ port_x, port_y);
+
+ continue;
+ }
+
+ port_element = level->field[port_x][port_y];
+
+ if (port_element < EL_SP_GRAVITY_PORT_RIGHT ||
+ port_element > EL_SP_GRAVITY_PORT_UP)
+ {
+ Error(ERR_WARN, "no special port at position (%d, %d)", port_x, port_y);
+
+ continue;
+ }
+
+ /* change previous (wrong) gravity inverting special port to either
+ gravity enabling special port or gravity disabling special port */
+ level->field[port_x][port_y] +=
+ (gravity == 1 ? EL_SP_GRAVITY_ON_PORT_RIGHT :
+ EL_SP_GRAVITY_OFF_PORT_RIGHT) - EL_SP_GRAVITY_PORT_RIGHT;
+ }
+
+ ReadUnusedBytesFromFile(file, 4); /* (not used by Supaplex engine) */
+
+ /* change special gravity ports without database entries to normal ports */
+ for (y = 0; y < SP_LEVEL_YSIZE; y++)
+ for (x = 0; x < SP_LEVEL_XSIZE; x++)
+ if (level->field[x][y] >= EL_SP_GRAVITY_PORT_RIGHT &&
+ level->field[x][y] <= EL_SP_GRAVITY_PORT_UP)
+ level->field[x][y] += EL_SP_PORT_RIGHT - EL_SP_GRAVITY_PORT_RIGHT;
+
+ /* auto-determine number of infotrons if it was stored as "0" -- see above */
+ if (level->gems_needed == 0)
+ {
+ for (y = 0; y < SP_LEVEL_YSIZE; y++)
+ for (x = 0; x < SP_LEVEL_XSIZE; x++)
+ if (level->field[x][y] == EL_SP_INFOTRON)
+ level->gems_needed++;
+
+ level->gems_needed &= 0xff; /* only use low byte -- see above */
+ }
+
+ level->fieldx = SP_LEVEL_XSIZE;
+ level->fieldy = SP_LEVEL_YSIZE;
+
+ level->time = 0; /* no time limit */
+ level->amoeba_speed = 0;
+ level->time_magic_wall = 0;
+ level->time_wheel = 0;
+ level->amoeba_content = EL_EMPTY;
+
+ for(i = 0; i < LEVEL_SCORE_ELEMENTS; i++)
+ level->score[i] = 0; /* !!! CORRECT THIS !!! */
+
+ /* there are no yamyams in supaplex levels */
+ for(i = 0; i < level->num_yamyam_contents; i++)
+ for(y = 0; y < 3; y++)
+ for(x = 0; x < 3; x++)
+ level->yamyam_content[i][x][y] = EL_EMPTY;
+}
+
+static void LoadLevelFromFileInfo_SP(struct LevelInfo *level,
+ struct LevelFileInfo *level_file_info)
+{
+ char *filename = level_file_info->filename;
+ FILE *file;
+ int nr = level_file_info->nr - leveldir_current->first_level;
+ int i, l, x, y;
+ char name_first, name_last;
+ struct LevelInfo multipart_level;
+ int multipart_xpos, multipart_ypos;
+ boolean is_multipart_level;
+ boolean is_first_part;
+ boolean reading_multipart_level = FALSE;
+ boolean use_empty_level = FALSE;
+
+ if (!(file = fopen(filename, MODE_READ)))
+ {
+ level->no_valid_file = TRUE;
+
+ Error(ERR_WARN, "cannot read level '%s' -- using empty level", filename);
+
+ return;
+ }
+
+ /* position file stream to the requested level inside the level package */
+ if (fseek(file, nr * SP_LEVEL_SIZE, SEEK_SET) != 0)
+ {
+ level->no_valid_file = TRUE;
+
+ Error(ERR_WARN, "cannot fseek level '%s' -- using empty level", filename);
+
+ return;
+ }
+
+ /* there exist Supaplex level package files with multi-part levels which
+ can be detected as follows: instead of leading and trailing dashes ('-')
+ to pad the level name, they have leading and trailing numbers which are
+ the x and y coordinations of the current part of the multi-part level;
+ if there are '?' characters instead of numbers on the left or right side
+ of the level name, the multi-part level consists of only horizontal or
+ vertical parts */
+
+ for (l = nr; l < NUM_SUPAPLEX_LEVELS_PER_PACKAGE; l++)
+ {
+ LoadLevelFromFileStream_SP(file, level, l);
+
+ /* check if this level is a part of a bigger multi-part level */
+
+ name_first = level->name[0];
+ name_last = level->name[SP_LEVEL_NAME_LEN - 1];
+
+ is_multipart_level =
+ ((name_first == '?' || (name_first >= '0' && name_first <= '9')) &&
+ (name_last == '?' || (name_last >= '0' && name_last <= '9')));
+
+ is_first_part =
+ ((name_first == '?' || name_first == '1') &&
+ (name_last == '?' || name_last == '1'));
+
+ /* correct leading multipart level meta information in level name */
+ for (i = 0; i < SP_LEVEL_NAME_LEN && level->name[i] == name_first; i++)
+ level->name[i] = '-';
+
+ /* correct trailing multipart level meta information in level name */
+ for (i = SP_LEVEL_NAME_LEN - 1; i>=0 && level->name[i] == name_last; i--)
+ level->name[i] = '-';
+
+ /* ---------- check for normal single level ---------- */
+
+ if (!reading_multipart_level && !is_multipart_level)
+ {
+ /* the current level is simply a normal single-part level, and we are
+ not reading a multi-part level yet, so return the level as it is */
+
+ break;
+ }
+
+ /* ---------- check for empty level (unused multi-part) ---------- */
+
+ if (!reading_multipart_level && is_multipart_level && !is_first_part)
+ {
+ /* this is a part of a multi-part level, but not the first part
+ (and we are not already reading parts of a multi-part level);
+ in this case, use an empty level instead of the single part */
+
+ use_empty_level = TRUE;
+
+ break;
+ }
+
+ /* ---------- check for finished multi-part level ---------- */
+
+ if (reading_multipart_level &&
+ (!is_multipart_level ||
+ strcmp(level->name, multipart_level.name) != 0))
+ {
+ /* we are already reading parts of a multi-part level, but this level is
+ either not a multi-part level, or a part of a different multi-part
+ level; in both cases, the multi-part level seems to be complete */
+
+ break;
+ }
+
+ /* ---------- here we have one part of a multi-part level ---------- */
+
+ reading_multipart_level = TRUE;
+
+ if (is_first_part) /* start with first part of new multi-part level */
+ {
+ /* copy level info structure from first part */
+ multipart_level = *level;
+
+ /* clear playfield of new multi-part level */
+ for (y = 0; y < MAX_LEV_FIELDY; y++)
+ for (x = 0; x < MAX_LEV_FIELDX; x++)
+ multipart_level.field[x][y] = EL_EMPTY;
+ }
+
+ if (name_first == '?')
+ name_first = '1';
+ if (name_last == '?')
+ name_last = '1';
+
+ multipart_xpos = (int)(name_first - '0');
+ multipart_ypos = (int)(name_last - '0');
+
+#if 0
+ printf("----------> part (%d/%d) of multi-part level '%s'\n",
+ multipart_xpos, multipart_ypos, multipart_level.name);
+#endif
+
+ if (multipart_xpos * SP_LEVEL_XSIZE > MAX_LEV_FIELDX ||
+ multipart_ypos * SP_LEVEL_YSIZE > MAX_LEV_FIELDY)
+ {
+ Error(ERR_WARN, "multi-part level is too big -- ignoring part of it");
+
+ break;
+ }
+
+ multipart_level.fieldx = MAX(multipart_level.fieldx,
+ multipart_xpos * SP_LEVEL_XSIZE);
+ multipart_level.fieldy = MAX(multipart_level.fieldy,
+ multipart_ypos * SP_LEVEL_YSIZE);
+
+ /* copy level part at the right position of multi-part level */
+ for (y = 0; y < SP_LEVEL_YSIZE; y++)
+ {
+ for (x = 0; x < SP_LEVEL_XSIZE; x++)
+ {
+ int start_x = (multipart_xpos - 1) * SP_LEVEL_XSIZE;
+ int start_y = (multipart_ypos - 1) * SP_LEVEL_YSIZE;
+
+ multipart_level.field[start_x + x][start_y + y] = level->field[x][y];
+ }
+ }
+ }
+
+ fclose(file);
+
+ if (use_empty_level)
+ {
+ setLevelInfoToDefaults(level);
+
+ level->fieldx = SP_LEVEL_XSIZE;
+ level->fieldy = SP_LEVEL_YSIZE;
+
+ for (y = 0; y < SP_LEVEL_YSIZE; y++)
+ for (x = 0; x < SP_LEVEL_XSIZE; x++)
+ level->field[x][y] = EL_EMPTY;
+
+ strcpy(level->name, "-------- EMPTY --------");
+
+ Error(ERR_WARN, "single part of multi-part level -- using empty level");
+ }
+
+ if (reading_multipart_level)
+ *level = multipart_level;
+}
+
+/* ------------------------------------------------------------------------- */
+/* functions for loading generic level */
+/* ------------------------------------------------------------------------- */
+
+void LoadLevelFromFileInfo(struct LevelInfo *level,
+ struct LevelFileInfo *level_file_info)
+{
+ /* always start with reliable default values */
+ setLevelInfoToDefaults(level);
+
+ switch (level_file_info->type)
+ {
+ case LEVEL_FILE_TYPE_RND:
+ LoadLevelFromFileInfo_RND(level, level_file_info);
+ break;
+
+ case LEVEL_FILE_TYPE_EM:
+ LoadLevelFromFileInfo_EM(level, level_file_info);
+ break;
+
+ case LEVEL_FILE_TYPE_SP:
+ LoadLevelFromFileInfo_SP(level, level_file_info);
+ break;
+
+ default:
+ LoadLevelFromFileInfo_RND(level, level_file_info);
+ break;
+ }
+}
+
+void LoadLevelFromFilename(struct LevelInfo *level, char *filename)
+{
+ static struct LevelFileInfo level_file_info;
+
+ /* always start with reliable default values */
+ setFileInfoToDefaults(&level_file_info);
+
+ level_file_info.nr = 0; /* unknown level number */
+ level_file_info.type = LEVEL_FILE_TYPE_RND; /* no others supported yet */
+ level_file_info.filename = filename;
+
+ LoadLevelFromFileInfo(level, &level_file_info);
+}
+