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#ifndef SAVELOAD_H

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#define SAVELOAD_H

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#include <setjmp.h>

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typedef void ChunkSaveLoadProc(void);

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typedef void AutolengthProc(void *arg);

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typedef struct SaveLoadGlobVarList {

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	void *address;

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	byte conv;

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	byte from_version;

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	byte to_version;

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} SaveLoadGlobVarList;

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typedef struct {

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	uint32 id;

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	ChunkSaveLoadProc *save_proc;

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	ChunkSaveLoadProc *load_proc;

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	uint32 flags;

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} ChunkHandler;

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typedef struct {

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	byte null;

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} NullStruct;

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typedef void WriterProc(uint len);

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typedef uint ReaderProc(void);

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typedef uint ReferenceToIntProc(void *v, uint t);

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typedef void *IntToReferenceProc(uint r, uint t);

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typedef struct {

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	bool save;

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	byte need_length;

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	byte block_mode;

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	bool error;

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	byte version;

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	uint16 full_version;

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	int obj_len;

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	int array_index, last_array_index;

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	uint32 offs_base;

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	WriterProc *write_bytes;

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	ReaderProc *read_bytes;

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	ReferenceToIntProc *ref_to_int_proc;

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	IntToReferenceProc *int_to_ref_proc;

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	const ChunkHandler * const * chs;

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	const byte * const *includes;

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	byte *bufp, *bufe;

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	int tmp;

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	// these 3 may be used by compressor/decompressors.

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	byte *buf; // pointer and size to read/write, initialized by init

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	uint bufsize;

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	FILE *fh;

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	void (*excpt_uninit)(void);

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	const char *excpt_msg;

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	jmp_buf excpt; // used to jump to "exception handler"

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} SaverLoader;

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extern SaverLoader _sl;

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enum {

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	REF_ORDER       = 0,

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	REF_VEHICLE     = 1,

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	REF_STATION     = 2,

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	REF_TOWN        = 3,

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	REF_VEHICLE_OLD = 4,

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	REF_ROADSTOPS   = 5

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};

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enum {

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	INC_VEHICLE_COMMON = 0,

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};

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enum {

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	CH_RIFF = 0,

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	CH_ARRAY = 1,

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	CH_SPARSE_ARRAY = 2,

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	CH_TYPE_MASK = 3,

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	CH_LAST = 8,

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	CH_AUTO_LENGTH = 16,

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	CH_PRI_0 = 0 << 4,

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	CH_PRI_1 = 1 << 4,

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	CH_PRI_2 = 2 << 4,

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	CH_PRI_3 = 3 << 4,

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	CH_PRI_SHL = 4,

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	CH_NUM_PRI_LEVELS = 4,

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};

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enum {

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	SLE_FILE_I8 = 0,

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	SLE_FILE_U8 = 1,

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	SLE_FILE_I16 = 2,

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	SLE_FILE_U16 = 3,

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	SLE_FILE_I32 = 4,

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	SLE_FILE_U32 = 5,

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	SLE_FILE_I64 = 6,

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	SLE_FILE_U64 = 7,

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	SLE_FILE_STRINGID = 8,

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//	SLE_FILE_IVAR = 8,

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//	SLE_FILE_UVAR = 9,

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	SLE_VAR_I8 = 0 << 4,

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	SLE_VAR_U8 = 1 << 4,

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	SLE_VAR_I16 = 2 << 4,

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	SLE_VAR_U16 = 3 << 4,

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	SLE_VAR_I32 = 4 << 4,

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	SLE_VAR_U32 = 5 << 4,

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	SLE_VAR_I64 = 6 << 4,

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	SLE_VAR_U64 = 7 << 4,

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	SLE_VAR_NULL = 8 << 4, // useful to write zeros in savegame.

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	SLE_VAR_INT = SLE_VAR_I32,

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	SLE_VAR_UINT = SLE_VAR_U32,

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	SLE_INT8 = SLE_FILE_I8 | SLE_VAR_I8,

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	SLE_UINT8 = SLE_FILE_U8 | SLE_VAR_U8,

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	SLE_INT16 = SLE_FILE_I16 | SLE_VAR_I16,

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	SLE_UINT16 = SLE_FILE_U16 | SLE_VAR_U16,

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	SLE_INT32 = SLE_FILE_I32 | SLE_VAR_I32,

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	SLE_UINT32 = SLE_FILE_U32 | SLE_VAR_U32,

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	SLE_INT64 = SLE_FILE_I64 | SLE_VAR_I64,

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	SLE_UINT64 = SLE_FILE_U64 | SLE_VAR_U64,

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	SLE_STRINGID = SLE_FILE_STRINGID | SLE_VAR_U16,

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};

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#define SLE_VAR(t,i,c) 0 | (offsetof(t,i) & 0xF), offsetof(t,i) >> 4, c

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#define SLE_REF(t,i,c) 0x10 | (offsetof(t,i) & 0xF), offsetof(t,i) >> 4, c

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#define SLE_ARR(t,i,c,l) 0x20 | (offsetof(t,i) & 0xF), offsetof(t,i) >> 4, c, l

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#define SLE_CONDVAR(t,i,c,from,to) 0x40 | (offsetof(t,i) & 0xF), offsetof(t,i) >> 4, c, from, to

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#define SLE_CONDREF(t,i,c,from,to) 0x50 | (offsetof(t,i) & 0xF), offsetof(t,i) >> 4, c, from, to

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#define SLE_CONDARR(t,i,c,l,from,to) 0x60 | (offsetof(t,i) & 0xF), offsetof(t,i) >> 4, c, from,to, l

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#define SLE_WRITEBYTE(t,i,b,c) 0x80 | (offsetof(t,i) & 0xF), offsetof(t,i) >> 4, b, c

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#define SLE_INCLUDE(t,i,c) 0x90 | (offsetof(t,i) & 0xF), offsetof(t,i) >> 4, c

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#define SLE_VARX(t,c) 0x00 | ((t) & 0xF), (t) >> 4, c

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#define SLE_REFX(t,c) 0x10 | ((t) & 0xF), (t) >> 4, c

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#define SLE_CONDVARX(t,c,from,to) 0x40 | ((t) & 0xF), (t) >> 4, c, from, to

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#define SLE_CONDREFX(t,c,from,to) 0x50 | ((t) & 0xF), (t) >> 4, c, from, to

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#define SLE_WRITEBYTEX(t,b) 0x80 | ((t) & 0xF), (t) >> 4, b

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#define SLE_INCLUDEX(t,c) 0x90 | ((t) & 0xF), (t) >> 4, c

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#define SLE_END() 0xF0

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void SlSetArrayIndex(uint index);

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int SlIterateArray(void);

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void SlArray(void *array, uint length, uint conv);

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void SlObject(void *object, const void *desc);

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void SlAutolength(AutolengthProc *proc, void *arg);

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uint SlGetFieldLength(void);

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int SlReadByte(void);

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void SlSetLength(uint length);

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void SlWriteByte(byte v);

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void SlGlobList(const SaveLoadGlobVarList *desc);

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//int GetSavegameType(char *file);

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#endif /* SAVELOAD_H */