1 // ============================================================================
2 // Mirror Magic -- McDuffin's Revenge
3 // ----------------------------------------------------------------------------
4 // (c) 1994-2017 by Artsoft Entertainment
7 // http://www.artsoft.org/
8 // ----------------------------------------------------------------------------
10 // ============================================================================
12 #include <sys/types.h>
21 #define CHUNK_ID_LEN 4 /* IFF style chunk id length */
22 #define CHUNK_SIZE_UNDEFINED 0 /* undefined chunk size == 0 */
23 #define CHUNK_SIZE_NONE -1 /* do not write chunk size */
24 #define FILE_VERS_CHUNK_SIZE 8 /* size of file version chunk */
25 #define LEVEL_HEADER_SIZE 80 /* size of level file header */
26 #define LEVEL_HEADER_UNUSED 19 /* unused level header bytes */
28 /* file identifier strings */
29 #define LEVEL_COOKIE_TMPL "MIRRORMAGIC_LEVEL_FILE_VERSION_x.x"
30 #define SCORE_COOKIE "MIRRORMAGIC_SCORE_FILE_VERSION_1.4"
33 int default_score[LEVEL_SCORE_ELEMENTS] =
35 [SC_COLLECTIBLE] = 10,
43 /* ========================================================================= */
44 /* level file functions */
45 /* ========================================================================= */
47 static void ReadChunk_MM_VERS(File *file, int *file_version, int *game_version)
49 int file_version_major, file_version_minor, file_version_patch;
50 int game_version_major, game_version_minor, game_version_patch;
52 file_version_major = getFile8Bit(file);
53 file_version_minor = getFile8Bit(file);
54 file_version_patch = getFile8Bit(file);
55 getFile8Bit(file); /* not used */
57 game_version_major = getFile8Bit(file);
58 game_version_minor = getFile8Bit(file);
59 game_version_patch = getFile8Bit(file);
60 getFile8Bit(file); /* not used */
62 *file_version = MM_VERSION_IDENT(file_version_major,
66 *game_version = MM_VERSION_IDENT(game_version_major,
71 static void WriteChunk_MM_VERS(FILE *file, int file_version, int game_version)
73 int file_version_major = MM_VERSION_MAJOR(file_version);
74 int file_version_minor = MM_VERSION_MINOR(file_version);
75 int file_version_patch = MM_VERSION_PATCH(file_version);
76 int game_version_major = MM_VERSION_MAJOR(game_version);
77 int game_version_minor = MM_VERSION_MINOR(game_version);
78 int game_version_patch = MM_VERSION_PATCH(game_version);
80 fputc(file_version_major, file);
81 fputc(file_version_minor, file);
82 fputc(file_version_patch, file);
83 fputc(0, file); /* not used */
85 fputc(game_version_major, file);
86 fputc(game_version_minor, file);
87 fputc(game_version_patch, file);
88 fputc(0, file); /* not used */
91 void setLevelInfoToDefaults_MM()
95 native_mm_level.file_version = MM_FILE_VERSION_ACTUAL;
96 native_mm_level.game_version = MM_GAME_VERSION_ACTUAL;
98 native_mm_level.encoding_16bit_field = FALSE; /* default: only 8-bit elements */
100 lev_fieldx = native_mm_level.fieldx = STD_LEV_FIELDX;
101 lev_fieldy = native_mm_level.fieldy = STD_LEV_FIELDY;
103 for (x = 0; x < MAX_LEV_FIELDX; x++)
104 for (y = 0; y < MAX_LEV_FIELDY; y++)
105 native_mm_level.field[x][y] = Feld[x][y] = Ur[x][y] = EL_EMPTY;
107 native_mm_level.time = 100;
108 native_mm_level.kettles_needed = 0;
109 native_mm_level.auto_count_kettles = TRUE;
110 native_mm_level.amoeba_speed = 0;
111 native_mm_level.time_fuse = 0;
112 native_mm_level.laser_red = FALSE;
113 native_mm_level.laser_green = FALSE;
114 native_mm_level.laser_blue = TRUE;
116 for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
117 native_mm_level.name[i] = '\0';
118 for (i = 0; i < MAX_LEVEL_AUTHOR_LEN; i++)
119 native_mm_level.author[i] = '\0';
121 strcpy(native_mm_level.name, NAMELESS_LEVEL_NAME);
122 strcpy(native_mm_level.author, ANONYMOUS_NAME);
124 for (i = 0; i < LEVEL_SCORE_ELEMENTS; i++)
125 native_mm_level.score[i] = 10;
127 native_mm_level.field[0][0] = Feld[0][0] = Ur[0][0] = EL_MCDUFFIN_RIGHT;
128 native_mm_level.field[STD_LEV_FIELDX-1][STD_LEV_FIELDY-1] =
129 Feld[STD_LEV_FIELDX-1][STD_LEV_FIELDY-1] =
130 Ur[STD_LEV_FIELDX-1][STD_LEV_FIELDY-1] = EL_EXIT_CLOSED;
133 static int checkLevelElement(int element)
135 if (element >= EL_FIRST_RUNTIME_EL)
137 Error(ERR_WARN, "invalid level element %d", element);
138 element = EL_CHAR_FRAGE;
144 static int LoadLevel_MM_VERS(File *file, int chunk_size,
145 struct LevelInfo_MM *level)
147 ReadChunk_MM_VERS(file, &level->file_version, &level->game_version);
152 static int LoadLevel_MM_HEAD(File *file, int chunk_size,
153 struct LevelInfo_MM *level)
158 lev_fieldx = level->fieldx = getFile8Bit(file);
159 lev_fieldy = level->fieldy = getFile8Bit(file);
161 level->time = getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
162 level->kettles_needed = getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN);
164 // one time unit was equivalent to four seconds in level files up to 2.0.x
165 if (level->file_version <= MM_FILE_VERSION_2_0)
168 for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
169 level->name[i] = getFile8Bit(file);
170 level->name[MAX_LEVEL_NAME_LEN] = 0;
172 for (i = 0; i < LEVEL_SCORE_ELEMENTS; i++)
173 level->score[i] = getFile8Bit(file);
175 // scores were 0 and hardcoded in game engine in level files up to 2.0.x
176 if (level->file_version <= MM_FILE_VERSION_2_0)
177 for (i = 0; i < LEVEL_SCORE_ELEMENTS; i++)
178 if (level->score[i] == 0)
179 level->score[i] = default_score[i];
181 level->auto_count_kettles = (getFile8Bit(file) == 1 ? TRUE : FALSE);
182 level->amoeba_speed = getFile8Bit(file);
183 level->time_fuse = getFile8Bit(file);
185 laser_color = getFile8Bit(file);
186 level->laser_red = (laser_color >> 2) & 0x01;
187 level->laser_green = (laser_color >> 1) & 0x01;
188 level->laser_blue = (laser_color >> 0) & 0x01;
190 level->encoding_16bit_field = (getFile8Bit(file) == 1 ? TRUE : FALSE);
192 ReadUnusedBytesFromFile(file, LEVEL_HEADER_UNUSED);
197 static int LoadLevel_MM_AUTH(File *file, int chunk_size,
198 struct LevelInfo_MM *level)
202 for (i = 0; i < MAX_LEVEL_AUTHOR_LEN; i++)
203 level->author[i] = getFile8Bit(file);
204 level->author[MAX_LEVEL_NAME_LEN] = 0;
209 static int LoadLevel_MM_BODY(File *file, int chunk_size,
210 struct LevelInfo_MM *level)
213 int chunk_size_expected = level->fieldx * level->fieldy;
215 /* Note: "chunk_size" was wrong before version 2.0 when elements are
216 stored with 16-bit encoding (and should be twice as big then).
217 Even worse, playfield data was stored 16-bit when only yamyam content
218 contained 16-bit elements and vice versa. */
220 if (level->encoding_16bit_field && level->file_version >= MM_FILE_VERSION_2_0)
221 chunk_size_expected *= 2;
223 if (chunk_size_expected != chunk_size)
225 ReadUnusedBytesFromFile(file, chunk_size);
227 return chunk_size_expected;
230 for (y = 0; y < level->fieldy; y++)
231 for (x = 0; x < level->fieldx; x++)
232 native_mm_level.field[x][y] = Feld[x][y] = Ur[x][y] =
233 checkLevelElement(level->encoding_16bit_field ?
234 getFile16BitInteger(file, BYTE_ORDER_BIG_ENDIAN) :
239 boolean LoadNativeLevel_MM(char *filename, boolean level_info_only)
241 char cookie[MAX_LINE_LEN];
242 char chunk_name[CHUNK_ID_LEN + 1];
250 int (*loader)(File *, int, struct LevelInfo_MM *);
254 { "VERS", FILE_VERS_CHUNK_SIZE, LoadLevel_MM_VERS },
255 { "HEAD", LEVEL_HEADER_SIZE, LoadLevel_MM_HEAD },
256 { "AUTH", MAX_LEVEL_AUTHOR_LEN, LoadLevel_MM_AUTH },
257 { "BODY", -1, LoadLevel_MM_BODY },
261 /* always start with reliable default values */
262 setLevelInfoToDefaults_MM();
264 if (!(file = openFile(filename, MODE_READ)))
266 if (!level_info_only)
267 Error(ERR_WARN, "cannot read level '%s' - creating new level", filename);
272 getFileChunk(file, chunk_name, NULL, BYTE_ORDER_BIG_ENDIAN);
273 if (strcmp(chunk_name, "MMII") == 0)
275 getFile32BitInteger(file, BYTE_ORDER_BIG_ENDIAN); /* not used */
277 getFileChunk(file, chunk_name, NULL, BYTE_ORDER_BIG_ENDIAN);
278 if (strcmp(chunk_name, "CAVE") != 0)
280 Error(ERR_WARN, "unknown format of level file '%s'", filename);
287 else /* check for pre-2.0 file format with cookie string */
289 strcpy(cookie, chunk_name);
290 getStringFromFile(file, &cookie[4], MAX_LINE_LEN - 4);
291 if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
292 cookie[strlen(cookie) - 1] = '\0';
294 if (!checkCookieString(cookie, LEVEL_COOKIE_TMPL))
296 Error(ERR_WARN, "unknown format of level file '%s'", filename);
303 if ((native_mm_level.file_version = getFileVersionFromCookieString(cookie))
306 Error(ERR_WARN, "unsupported version of level file '%s'", filename);
314 while (getFileChunk(file, chunk_name, &chunk_size, BYTE_ORDER_BIG_ENDIAN))
318 while (chunk_info[i].name != NULL &&
319 strcmp(chunk_name, chunk_info[i].name) != 0)
322 if (chunk_info[i].name == NULL)
324 Error(ERR_WARN, "unknown chunk '%s' in level file '%s'",
325 chunk_name, filename);
327 ReadUnusedBytesFromFile(file, chunk_size);
329 else if (chunk_info[i].size != -1 &&
330 chunk_info[i].size != chunk_size)
332 Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
333 chunk_size, chunk_name, filename);
335 ReadUnusedBytesFromFile(file, chunk_size);
339 /* call function to load this level chunk */
340 int chunk_size_expected =
341 (chunk_info[i].loader)(file, chunk_size, &native_mm_level);
343 /* the size of some chunks cannot be checked before reading other
344 chunks first (like "HEAD" and "BODY") that contain some header
345 information, so check them here */
346 if (chunk_size_expected != chunk_size)
347 Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
348 chunk_size, chunk_name, filename);
357 static void SaveLevel_MM_HEAD(FILE *file, struct LevelInfo_MM *level)
362 fputc(level->fieldx, file);
363 fputc(level->fieldy, file);
365 putFile16BitInteger(file, level->time, BYTE_ORDER_BIG_ENDIAN);
366 putFile16BitInteger(file, level->kettles_needed, BYTE_ORDER_BIG_ENDIAN);
368 for (i = 0; i < MAX_LEVEL_NAME_LEN; i++)
369 fputc(level->name[i], file);
371 for (i = 0; i < LEVEL_SCORE_ELEMENTS; i++)
372 fputc(level->score[i], file);
374 fputc((level->auto_count_kettles ? 1 : 0), file);
375 fputc(level->amoeba_speed, file);
376 fputc(level->time_fuse, file);
378 laser_color = ((level->laser_red << 2) |
379 (level->laser_green << 1) |
380 (level->laser_blue << 0));
381 fputc(laser_color, file);
383 fputc((level->encoding_16bit_field ? 1 : 0), file);
385 WriteUnusedBytesToFile(file, LEVEL_HEADER_UNUSED);
388 static void SaveLevel_MM_AUTH(FILE *file, struct LevelInfo_MM *level)
392 for (i = 0; i < MAX_LEVEL_AUTHOR_LEN; i++)
393 fputc(level->author[i], file);
396 static void SaveLevel_MM_BODY(FILE *file, struct LevelInfo_MM *level)
400 for (y = 0; y < level->fieldy; y++)
401 for (x = 0; x < level->fieldx; x++)
402 if (level->encoding_16bit_field)
403 putFile16BitInteger(file, Ur[x][y], BYTE_ORDER_BIG_ENDIAN);
405 fputc(Ur[x][y], file);
408 void SaveNativeLevel_MM(char *filename)
414 if (!(file = fopen(filename, MODE_WRITE)))
416 Error(ERR_WARN, "cannot save level file '%s'", filename);
421 /* check level field for 16-bit elements */
422 native_mm_level.encoding_16bit_field = FALSE;
424 for (y = 0; y < native_mm_level.fieldy; y++)
425 for (x = 0; x < native_mm_level.fieldx; x++)
427 native_mm_level.encoding_16bit_field = TRUE;
430 native_mm_level.fieldx * native_mm_level.fieldy *
431 (native_mm_level.encoding_16bit_field ? 2 : 1);
433 putFileChunk(file, "MMII", CHUNK_SIZE_UNDEFINED, BYTE_ORDER_BIG_ENDIAN);
434 putFileChunk(file, "CAVE", CHUNK_SIZE_NONE, BYTE_ORDER_BIG_ENDIAN);
436 putFileChunk(file, "VERS", FILE_VERS_CHUNK_SIZE, BYTE_ORDER_BIG_ENDIAN);
437 WriteChunk_MM_VERS(file, MM_FILE_VERSION_ACTUAL, MM_GAME_VERSION_ACTUAL);
439 putFileChunk(file, "HEAD", LEVEL_HEADER_SIZE, BYTE_ORDER_BIG_ENDIAN);
440 SaveLevel_MM_HEAD(file, &native_mm_level);
442 putFileChunk(file, "AUTH", MAX_LEVEL_AUTHOR_LEN, BYTE_ORDER_BIG_ENDIAN);
443 SaveLevel_MM_AUTH(file, &native_mm_level);
445 putFileChunk(file, "BODY", body_chunk_size, BYTE_ORDER_BIG_ENDIAN);
446 SaveLevel_MM_BODY(file, &native_mm_level);
450 SetFilePermissions(filename, PERMS_PRIVATE);