tron@2186: /* $Id$ */
tron@2186: 
truelight@0: #ifndef SAVELOAD_H
truelight@0: #define SAVELOAD_H
truelight@0: 
tron@2162: typedef enum SaveOrLoadResult {
tron@2162: 	SL_OK = 0, // completed successfully
tron@2162: 	SL_ERROR = 1, // error that was caught before internal structures were modified
tron@2162: 	SL_REINIT = 2, // error that was caught in the middle of updating game state, need to clear it. (can only happen during load)
tron@2162: } SaveOrLoadResult;
tron@2162: 
tron@2162: typedef enum SaveOrLoadMode {
tron@2162: 	SL_INVALID = -1,
tron@2162: 	SL_LOAD = 0,
tron@2162: 	SL_SAVE = 1,
tron@2162: 	SL_OLD_LOAD = 2,
tron@2162: } SaveOrLoadMode;
tron@2162: 
tron@2162: SaveOrLoadResult SaveOrLoad(const char *filename, int mode);
tron@2285: void WaitTillSaved(void);
tron@2162: 
tron@2162: 
tron@1093: typedef void ChunkSaveLoadProc(void);
truelight@0: typedef void AutolengthProc(void *arg);
truelight@0: 
truelight@0: typedef struct SaveLoadGlobVarList {
truelight@0: 	void *address;
truelight@0: 	byte conv;
truelight@2685: 	uint16 from_version;
truelight@2685: 	uint16 to_version;
truelight@0: } SaveLoadGlobVarList;
truelight@0: 
truelight@0: typedef struct {
truelight@0: 	uint32 id;
truelight@0: 	ChunkSaveLoadProc *save_proc;
truelight@0: 	ChunkSaveLoadProc *load_proc;
truelight@0: 	uint32 flags;
truelight@0: } ChunkHandler;
truelight@0: 
truelight@0: typedef struct {
truelight@0: 	byte null;
truelight@0: } NullStruct;
truelight@0: 
Darkvater@1881: typedef enum SLRefType {
truelight@1024: 	REF_ORDER       = 0,
truelight@1024: 	REF_VEHICLE     = 1,
truelight@1024: 	REF_STATION     = 2,
truelight@1024: 	REF_TOWN        = 3,
celestar@1217: 	REF_VEHICLE_OLD = 4,
celestar@1217: 	REF_ROADSTOPS   = 5
Darkvater@1881: } SLRefType;
truelight@0: 
Darkvater@1881: 
truelight@2685: extern uint16 _sl_version;       /// the major savegame version identifier
truelight@2685: extern byte   _sl_minor_version; /// the minor savegame version, DO NOT USE!
Darkvater@1881: 
truelight@0: 
truelight@0: enum {
truelight@0: 	INC_VEHICLE_COMMON = 0,
truelight@0: };
truelight@0: 
truelight@0: enum {
truelight@0: 	CH_RIFF = 0,
truelight@0: 	CH_ARRAY = 1,
truelight@0: 	CH_SPARSE_ARRAY = 2,
truelight@0: 	CH_TYPE_MASK = 3,
truelight@0: 	CH_LAST = 8,
truelight@0: 	CH_AUTO_LENGTH = 16,
truelight@0: 	CH_PRI_0 = 0 << 4,
truelight@0: 	CH_PRI_1 = 1 << 4,
truelight@0: 	CH_PRI_2 = 2 << 4,
truelight@0: 	CH_PRI_3 = 3 << 4,
truelight@0: 	CH_PRI_SHL = 4,
truelight@0: 	CH_NUM_PRI_LEVELS = 4,
truelight@0: };
truelight@0: 
Darkvater@1881: typedef enum VarTypes {
Darkvater@1881: 	SLE_FILE_I8  = 0,
Darkvater@1881: 	SLE_FILE_U8  = 1,
truelight@0: 	SLE_FILE_I16 = 2,
truelight@0: 	SLE_FILE_U16 = 3,
truelight@0: 	SLE_FILE_I32 = 4,
truelight@0: 	SLE_FILE_U32 = 5,
truelight@0: 	SLE_FILE_I64 = 6,
truelight@0: 	SLE_FILE_U64 = 7,
truelight@0: 
truelight@0: 	SLE_FILE_STRINGID = 8,
truelight@0: //	SLE_FILE_IVAR = 8,
truelight@0: //	SLE_FILE_UVAR = 9,
truelight@0: 
Darkvater@1881: 	SLE_VAR_I8   = 0 << 4,
Darkvater@1881: 	SLE_VAR_U8   = 1 << 4,
Darkvater@1881: 	SLE_VAR_I16  = 2 << 4,
Darkvater@1881: 	SLE_VAR_U16  = 3 << 4,
Darkvater@1881: 	SLE_VAR_I32  = 4 << 4,
Darkvater@1881: 	SLE_VAR_U32  = 5 << 4,
Darkvater@1881: 	SLE_VAR_I64  = 6 << 4,
Darkvater@1881: 	SLE_VAR_U64  = 7 << 4,
truelight@0: 
truelight@0: 	SLE_VAR_NULL = 8 << 4, // useful to write zeros in savegame.
truelight@0: 
Darkvater@1881: 	SLE_VAR_INT  = SLE_VAR_I32,
truelight@0: 	SLE_VAR_UINT = SLE_VAR_U32,
truelight@0: 
Darkvater@1881: 	SLE_INT8   = SLE_FILE_I8  | SLE_VAR_I8,
Darkvater@1881: 	SLE_UINT8  = SLE_FILE_U8  | SLE_VAR_U8,
Darkvater@1881: 	SLE_INT16  = SLE_FILE_I16 | SLE_VAR_I16,
truelight@0: 	SLE_UINT16 = SLE_FILE_U16 | SLE_VAR_U16,
Darkvater@1881: 	SLE_INT32  = SLE_FILE_I32 | SLE_VAR_I32,
truelight@0: 	SLE_UINT32 = SLE_FILE_U32 | SLE_VAR_U32,
Darkvater@1881: 	SLE_INT64  = SLE_FILE_I64 | SLE_VAR_I64,
truelight@0: 	SLE_UINT64 = SLE_FILE_U64 | SLE_VAR_U64,
truelight@0: 
truelight@0: 	SLE_STRINGID = SLE_FILE_STRINGID | SLE_VAR_U16,
Darkvater@1881: } VarType;
Darkvater@1881: 
Darkvater@1881: enum SaveLoadTypes {
Darkvater@1881: 	SL_VAR       = 0,
Darkvater@1881: 	SL_REF       = 1,
Darkvater@1881: 	SL_ARR       = 2,
Darkvater@1881: 	SL_CONDVAR   = 0 | (1 << 2), // 4
Darkvater@1881: 	SL_CONDREF   = 1 | (1 << 2), // 5
Darkvater@1881: 	SL_CONDARR   = 2 | (1 << 2), // 6
Darkvater@1881: 	// non-normal save-load types
Darkvater@1881: 	SL_WRITEBYTE = 8,
Darkvater@1881: 	SL_INCLUDE   = 9,
Darkvater@1881: 	SL_END       = 15
truelight@0: };
truelight@0: 
Darkvater@1881: /** SaveLoad type struct. Do NOT use this directly but use the SLE_ macros defined just below! */
tron@2295: typedef struct SaveLoad {
Darkvater@1881: 	byte cmd;             /// the action to take with the saved/loaded type, All types need different action
Darkvater@1881: 	VarType type;         /// type of the variable to be saved, int
Darkvater@1881: 	uint16 offset;        /// offset of this variable in the struct (max offset is 65536)
Darkvater@1881: 	uint16 length;        /// (conditional) length of the variable (eg. arrays) (max array size is 65536 elements)
Darkvater@1881: 	uint16 version_from;  /// save/load the variable starting from this savegame version
Darkvater@1881: 	uint16 version_to;    /// save/load the variable until this savegame version
tron@2295: } SaveLoad;
truelight@0: 
Darkvater@1881: /* Simple variables, references (pointers) and arrays */
Darkvater@1881: #define SLE_VAR(base, variable, type) {SL_VAR, type, offsetof(base, variable), 0, 0, 0}
Darkvater@1881: #define SLE_REF(base, variable, type) {SL_REF, type, offsetof(base, variable), 0, 0, 0}
Darkvater@1881: #define SLE_ARR(base, variable, type, length) {SL_ARR, type, offsetof(base, variable), length, 0, 0}
Darkvater@1881: /* Conditional variables, references (pointers) and arrays that are only valid for certain savegame versions */
Darkvater@1881: #define SLE_CONDVAR(base, variable, type, from, to) {SL_CONDVAR, type, offsetof(base, variable), 0, from, to}
Darkvater@1881: #define SLE_CONDREF(base, variable, type, from, to) {SL_CONDREF, type, offsetof(base, variable), 0, from, to}
Darkvater@1881: #define SLE_CONDARR(base, variable, type, length, from, to) {SL_CONDARR, type, offsetof(base, variable), length, from, to}
Darkvater@1881: /* Translate values ingame to different values in the savegame and vv */
Darkvater@1881: #define SLE_WRITEBYTE(base, variable, game_value, file_value) {SL_WRITEBYTE, 0, offsetof(base, variable), 0, game_value, file_value}
Darkvater@1881: /* Load common code and put it into each struct (currently only for vehicles */
Darkvater@1881: #define SLE_INCLUDE(base, variable, include_index) {SL_INCLUDE, 0, offsetof(base, variable), 0, include_index, 0}
truelight@0: 
Darkvater@1881: /* The same as the ones at the top, only the offset is given directly; used for unions */
Darkvater@1881: #define SLE_VARX(offset, type) {SL_VAR, type, offset, 0, 0, 0}
Darkvater@1881: #define SLE_REFX(offset, type) {SL_REF, type, offset, 0, 0, 0}
Darkvater@1881: #define SLE_CONDVARX(offset, type, from, to) {SL_CONDVAR, type, offset, 0, from, to}
Darkvater@1881: #define SLE_CONDREFX(offset, type, from, to) {SL_CONDREF, type, offset, 0, from, to}
Darkvater@1881: #define SLE_WRITEBYTEX(offset, something) {SL_WRITEBYTE, 0, offset, 0, something, 0}
Darkvater@1881: #define SLE_INCLUDEX(offset, type) {SL_INCLUDE, type, offset, 0, 0, 0}
truelight@0: 
Darkvater@1881: /* End marker */
Darkvater@1881: #define SLE_END() {SL_END, 0, 0, 0, 0, 0}
truelight@0: 
truelight@2685: /** Checks if the savegame is below major.minor.
truelight@2685:  */
truelight@2685: static inline bool CheckSavegameVersionOldStyle(uint16 major, byte minor)
truelight@2685: {
truelight@2685: 	return (_sl_version < major) || (_sl_version == major && _sl_minor_version < minor);
truelight@2685: }
truelight@2685: 
truelight@2685: /** Checks if the savegame is below version.
truelight@2685:  */
truelight@2685: static inline bool CheckSavegameVersion(uint16 version)
truelight@2685: {
truelight@2685: 	return _sl_version < version;
truelight@2685: }
truelight@2685: 
truelight@0: void SlSetArrayIndex(uint index);
tron@1093: int SlIterateArray(void);
orudge@1887: void SlArray(void *array, uint length, VarType conv);
Darkvater@1881: void SlObject(void *object, const SaveLoad *desc);
truelight@0: void SlAutolength(AutolengthProc *proc, void *arg);
tron@1093: uint SlGetFieldLength(void);
tron@1093: int SlReadByte(void);
Darkvater@1881: void SlSetLength(size_t length);
Darkvater@1881: void SlWriteByte(byte b);
truelight@0: void SlGlobList(const SaveLoadGlobVarList *desc);
truelight@0: 
Darkvater@2380: void SaveFileStart(void);
Darkvater@2380: void SaveFileDone(void);
Darkvater@2380: void SaveFileError(void);
truelight@0: #endif /* SAVELOAD_H */