0
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#include "stdafx.h"
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#include "ttd.h"
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#include "vehicle.h"
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#include "station.h"
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#include "town.h"
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#include "player.h"
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#include "saveload.h"
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#include <setjmp.h>
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enum {
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SAVEGAME_MAJOR_VERSION = 4,
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SAVEGAME_MINOR_VERSION = 0,
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SAVEGAME_LOADABLE_VERSION = (SAVEGAME_MAJOR_VERSION << 8) + SAVEGAME_MINOR_VERSION
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};
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/******************************************************/
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/******************************************************/
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/******************************************************/
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typedef void WriterProc(uint len);
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typedef uint ReaderProc();
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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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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)();
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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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enum NeedLengthValues { NL_NONE = 0,NL_WANTLENGTH = 1,NL_CALCLENGTH = 2};
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SaverLoader _sl;
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// fill the input buffer
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static void SlReadFill()
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{
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uint len = _sl.read_bytes();
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assert(len != 0);
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_sl.bufp = _sl.buf;
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_sl.bufe = _sl.buf + len;
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_sl.offs_base += len;
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}
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static uint32 SlGetOffs()
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{
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return _sl.offs_base - (_sl.bufe - _sl.bufp);
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}
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// flush the output buffer
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static void SlWriteFill()
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{
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// flush current buffer?
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if (_sl.bufp != NULL) {
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uint len = _sl.bufp - _sl.buf;
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_sl.offs_base += len;
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if (len) _sl.write_bytes(len);
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}
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// setup next buffer
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_sl.bufp = _sl.buf;
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_sl.bufe = _sl.buf + _sl.bufsize;
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}
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// error handler, calls longjmp to simulate an exception.
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static void NORETURN SlError(const char *msg)
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{
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_sl.excpt_msg = msg;
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longjmp(_sl.excpt, 0);
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}
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int SlReadByte()
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{
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if (_sl.bufp == _sl.bufe) SlReadFill();
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return *_sl.bufp++;
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}
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void SlWriteByte(byte v)
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{
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if (_sl.bufp == _sl.bufe) SlWriteFill();
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*_sl.bufp++ = v;
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}
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int SlReadUint16()
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{
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int x = SlReadByte() << 8;
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return x | SlReadByte();
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}
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uint32 SlReadUint32()
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{
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uint32 x = SlReadUint16() << 16;
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return x | SlReadUint16();
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}
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uint64 SlReadUint64()
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{
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uint32 x = SlReadUint32();
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uint32 y = SlReadUint32();
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return (uint64)x << 32 | y;
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}
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void SlWriteUint16(uint16 v)
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{
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SlWriteByte((byte)(v >> 8));
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SlWriteByte((byte)v);
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}
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void SlWriteUint32(uint32 v)
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{
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SlWriteUint16((uint16)(v >> 16));
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SlWriteUint16((uint16)v);
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}
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void SlWriteUint64(uint64 x)
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{
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SlWriteUint32((uint32)(x >> 32));
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SlWriteUint32((uint32)x);
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}
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static int SlReadSimpleGamma()
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{
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int x = SlReadByte();
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if (x & 0x80)
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x = ((x&0x7F) << 8) + SlReadByte();
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return x;
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}
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static void SlWriteSimpleGamma(uint i)
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{
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assert(i < (1 << 14));
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if (i >= 0x80) {
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SlWriteByte((byte)(0x80|(i >> 8)));
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SlWriteByte((byte)i);
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} else {
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SlWriteByte(i);
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}
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}
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static uint SlGetGammaLength(uint i) {
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return (i>=0x80) ? 2 : 1;
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}
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int INLINE SlReadSparseIndex()
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{
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return SlReadSimpleGamma();
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}
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void INLINE SlWriteSparseIndex(uint index)
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{
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SlWriteSimpleGamma(index);
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}
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int INLINE SlReadArrayLength()
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{
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return SlReadSimpleGamma();
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}
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void INLINE SlWriteArrayLength(uint length)
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{
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SlWriteSimpleGamma(length);
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}
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void SlSetArrayIndex(uint index)
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{
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_sl.need_length = NL_WANTLENGTH;
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_sl.array_index = index;
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}
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int SlIterateArray()
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{
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int ind;
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static uint32 next_offs;
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// Must be at end of current block.
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assert(next_offs == 0 || SlGetOffs() == next_offs);
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while(true) {
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uint len = SlReadArrayLength();
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if (len == 0) {
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next_offs = 0;
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return -1;
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}
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_sl.obj_len = --len;
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next_offs = SlGetOffs() + len;
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switch(_sl.block_mode) {
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case CH_SPARSE_ARRAY: ind = SlReadSparseIndex(); break;
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case CH_ARRAY: ind = _sl.array_index++; break;
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default:
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DEBUG(misc, 0) ("SlIterateArray: error\n");
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return -1; // error
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}
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if (len != 0)
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return ind;
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}
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}
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// Sets the length of either a RIFF object or the number of items in an array.
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void SlSetLength(uint length)
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{
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switch(_sl.need_length) {
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case NL_WANTLENGTH:
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_sl.need_length = NL_NONE;
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switch(_sl.block_mode) {
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case CH_RIFF:
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// Really simple to write a RIFF length :)
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SlWriteUint32(length);
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break;
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case CH_ARRAY:
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assert(_sl.array_index >= _sl.last_array_index);
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while (++_sl.last_array_index <= _sl.array_index)
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SlWriteArrayLength(1);
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SlWriteArrayLength(length + 1);
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break;
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case CH_SPARSE_ARRAY:
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SlWriteArrayLength(length + 1 + SlGetGammaLength(_sl.array_index)); // Also include length of sparse index.
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SlWriteSparseIndex(_sl.array_index);
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break;
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default: NOT_REACHED();
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}
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break;
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case NL_CALCLENGTH:
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_sl.obj_len += length;
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break;
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}
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}
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void SlCopyBytes(void *ptr, size_t length)
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{
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byte *p = (byte*)ptr;
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if (_sl.save) {
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while(length) {
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SlWriteByte(*p++);
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length--;
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}
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} else {
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while(length) {
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// INLINED SlReadByte
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#if !defined(_DEBUG)
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if (_sl.bufp == _sl.bufe) SlReadFill();
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*p++ = *_sl.bufp++;
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#else
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*p++ = SlReadByte();
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#endif
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length--;
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}
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}
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}
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void SlSkipBytes(size_t length)
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{
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while (length) {
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SlReadByte();
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length--;
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}
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}
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uint SlGetFieldLength()
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{
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return _sl.obj_len;
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}
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static void SlSaveLoadConv(void *ptr, uint conv)
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{
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int64 x = 0;
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if (_sl.save) {
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// Read a value from the struct. These ARE endian safe.
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switch((conv >> 4)&0xf) {
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case SLE_VAR_I8>>4: x = *(int8*)ptr; break;
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case SLE_VAR_U8>>4: x = *(byte*)ptr; break;
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case SLE_VAR_I16>>4: x = *(int16*)ptr; break;
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case SLE_VAR_U16>>4: x = *(uint16*)ptr; break;
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case SLE_VAR_I32>>4: x = *(int32*)ptr; break;
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case SLE_VAR_U32>>4: x = *(uint32*)ptr; break;
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case SLE_VAR_I64>>4: x = *(int64*)ptr; break;
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case SLE_VAR_U64>>4: x = *(uint64*)ptr; break;
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case SLE_VAR_NULL>>4: x = 0; break;
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default:
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NOT_REACHED();
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}
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// Write it to the file
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switch(conv & 0xF) {
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case SLE_FILE_I8: assert(x >= -128 && x <= 127); SlWriteByte(x);break;
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case SLE_FILE_U8: assert(x >= 0 && x <= 255); SlWriteByte(x);break;
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case SLE_FILE_I16:assert(x >= -32768 && x <= 32767); SlWriteUint16(x);break;
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case SLE_FILE_STRINGID:
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case SLE_FILE_U16:assert(x >= 0 && x <= 65535); SlWriteUint16(x);break;
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case SLE_FILE_I32:
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case SLE_FILE_U32:SlWriteUint32((uint32)x);break;
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case SLE_FILE_I64:
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case SLE_FILE_U64:SlWriteUint64(x);break;
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default:
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assert(0);
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NOT_REACHED();
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}
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} else {
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// Read a value from the file
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switch(conv & 0xF) {
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case SLE_FILE_I8: x = (int8)SlReadByte(); break;
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case SLE_FILE_U8: x = (byte)SlReadByte(); break;
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case SLE_FILE_I16: x = (int16)SlReadUint16(); break;
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case SLE_FILE_U16: x = (uint16)SlReadUint16(); break;
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case SLE_FILE_I32: x = (int32)SlReadUint32(); break;
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case SLE_FILE_U32: x = (uint32)SlReadUint32(); break;
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case SLE_FILE_I64: x = (int64)SlReadUint64(); break;
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case SLE_FILE_U64: x = (uint64)SlReadUint64(); break;
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case SLE_FILE_STRINGID: x = RemapOldStringID((uint16)SlReadUint16()); break;
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default:
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assert(0);
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NOT_REACHED();
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}
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// Write it to the struct, these ARE endian safe.
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switch((conv >> 4)&0xf) {
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case SLE_VAR_I8>>4: *(int8*)ptr = x; break;
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case SLE_VAR_U8>>4: *(byte*)ptr = x; break;
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case SLE_VAR_I16>>4: *(int16*)ptr = x; break;
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358 |
case SLE_VAR_U16>>4: *(uint16*)ptr = x; break;
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359 |
case SLE_VAR_I32>>4: *(int32*)ptr = x; break;
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360 |
case SLE_VAR_U32>>4: *(uint32*)ptr = x; break;
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case SLE_VAR_I64>>4: *(int64*)ptr = x; break;
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362 |
case SLE_VAR_U64>>4: *(uint64*)ptr = x; break;
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case SLE_VAR_NULL: break;
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default:
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NOT_REACHED();
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366 |
}
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367 |
}
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368 |
}
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369 |
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370 |
static const byte _conv_lengths[] = {1,1,2,2,4,4,8,8,2};
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371 |
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static uint SlCalcConvLen(uint conv, void *p)
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{
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return _conv_lengths[conv & 0xF];
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375 |
}
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376 |
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static uint SlCalcArrayLen(void *array, uint length, uint conv)
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378 |
{
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return _conv_lengths[conv & 0xF] * length;
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380 |
}
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381 |
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382 |
static const byte _conv_mem_size[9] = {1,1,2,2,4,4,8,8,0};
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383 |
void SlArray(void *array, uint length, uint conv)
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384 |
{
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385 |
// Automatically calculate the length?
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386 |
if (_sl.need_length != NL_NONE) {
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387 |
SlSetLength(SlCalcArrayLen(array, length, conv));
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388 |
// Determine length only?
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389 |
if (_sl.need_length == NL_CALCLENGTH)
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390 |
return;
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391 |
}
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392 |
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393 |
// handle buggy stuff
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394 |
if (!_sl.save && _sl.version == 0) {
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395 |
if (conv == SLE_INT16 || conv == SLE_UINT16 || conv == SLE_STRINGID) {
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396 |
length *= 2;
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397 |
conv = SLE_INT8;
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398 |
} else if (conv == SLE_INT32 || conv == SLE_UINT32) {
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399 |
length *= 4;
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400 |
conv = SLE_INT8;
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401 |
}
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402 |
}
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403 |
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404 |
// Optimized cases when input equals output.
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405 |
switch(conv) {
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406 |
case SLE_INT8:
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407 |
case SLE_UINT8:SlCopyBytes(array, length);break;
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408 |
default: {
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409 |
// Default "slow" case.
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410 |
byte *a = (byte*)array;
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411 |
while (length) {
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412 |
SlSaveLoadConv(a, conv);
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413 |
a += _conv_mem_size[(conv >> 4)&0xf];
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414 |
length--;
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415 |
}
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416 |
}
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417 |
}
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418 |
}
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419 |
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420 |
// Calculate the size of an object.
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421 |
static size_t SlCalcObjLength(void *object, const void *desc)
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|
422 |
{
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423 |
size_t length = 0;
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424 |
uint cmd,conv;
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425 |
byte *d = (byte*)desc;
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426 |
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427 |
// Need to determine the length and write a length tag.
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428 |
while (true) {
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429 |
cmd = (d[0] >> 4);
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430 |
if (cmd < 8) {
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431 |
conv = d[2];
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432 |
d += 3;
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433 |
if (cmd&4) {
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434 |
d += 2;
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435 |
// check if the field is of the right version
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|
436 |
if (_sl.version < d[-2] || _sl.version > d[-1]) {
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|
437 |
if ((cmd & 3) == 2) d++;
|
|
438 |
continue;
|
|
439 |
}
|
|
440 |
}
|
|
441 |
|
|
442 |
switch(cmd&3) {
|
|
443 |
// Normal variable
|
|
444 |
case 0: length += SlCalcConvLen(conv, NULL);break;
|
|
445 |
// Reference
|
|
446 |
case 1: length += 2; break;
|
|
447 |
// Array
|
|
448 |
case 2: length += SlCalcArrayLen(NULL, *d++, conv); break;
|
|
449 |
default:NOT_REACHED();
|
|
450 |
}
|
|
451 |
} else if (cmd == 8) {
|
|
452 |
length++;
|
|
453 |
d += 4;
|
|
454 |
} else if (cmd == 9) {
|
|
455 |
length += SlCalcObjLength(NULL, _sl.includes[d[2]]);
|
|
456 |
d += 3;
|
|
457 |
} else if (cmd == 15)
|
|
458 |
break;
|
|
459 |
else
|
|
460 |
assert(0);
|
|
461 |
}
|
|
462 |
return length;
|
|
463 |
}
|
|
464 |
|
|
465 |
void SlObject(void *object, const void *desc)
|
|
466 |
{
|
|
467 |
byte *d = (byte*)desc;
|
|
468 |
void *ptr;
|
|
469 |
uint cmd,conv;
|
|
470 |
|
|
471 |
// Automatically calculate the length?
|
|
472 |
if (_sl.need_length != NL_NONE) {
|
|
473 |
SlSetLength(SlCalcObjLength(object, d));
|
|
474 |
if (_sl.need_length == NL_CALCLENGTH)
|
|
475 |
return;
|
|
476 |
}
|
|
477 |
|
|
478 |
while (true) {
|
|
479 |
// Currently it only supports up to 4096 byte big objects
|
|
480 |
ptr = (byte*)object + (d[0] & 0xF) + (d[1] << 4);
|
|
481 |
|
|
482 |
cmd = d[0] >> 4;
|
|
483 |
|
|
484 |
if (cmd < 8) {
|
|
485 |
conv = d[2];
|
|
486 |
d += 3;
|
|
487 |
|
|
488 |
if (cmd&4) {
|
|
489 |
d += 2;
|
|
490 |
// check if the field is of the right version
|
|
491 |
if (_sl.version < d[-2] || _sl.version > d[-1]) {
|
|
492 |
if ((cmd & 3) == 2) d++;
|
|
493 |
continue;
|
|
494 |
}
|
|
495 |
}
|
|
496 |
|
|
497 |
switch(cmd&3) {
|
|
498 |
// Normal variable
|
|
499 |
case 0: SlSaveLoadConv(ptr, conv); break;
|
|
500 |
// Reference
|
|
501 |
case 1:
|
|
502 |
if (_sl.save) {
|
|
503 |
SlWriteUint16(_sl.ref_to_int_proc(*(void**)ptr, conv));
|
|
504 |
} else {
|
|
505 |
*(void**)ptr = _sl.int_to_ref_proc(SlReadUint16(), conv);
|
|
506 |
}
|
|
507 |
break;
|
|
508 |
// Array
|
|
509 |
case 2: SlArray(ptr, *d++, conv); break;
|
|
510 |
default:NOT_REACHED();
|
|
511 |
}
|
|
512 |
|
|
513 |
// Write byte.
|
|
514 |
} else if (cmd == 8) {
|
|
515 |
if (_sl.save) {
|
|
516 |
SlWriteByte(d[3]);
|
|
517 |
} else {
|
|
518 |
*(byte*)ptr = d[2];
|
|
519 |
}
|
|
520 |
d += 4;
|
|
521 |
|
|
522 |
// Include
|
|
523 |
} else if (cmd == 9) {
|
|
524 |
SlObject(ptr, _sl.includes[d[2]]);
|
|
525 |
d += 3;
|
|
526 |
} else if (cmd == 15)
|
|
527 |
break;
|
|
528 |
else
|
|
529 |
assert(0);
|
|
530 |
}
|
|
531 |
}
|
|
532 |
|
|
533 |
|
|
534 |
static size_t SlCalcGlobListLength(const SaveLoadGlobVarList *desc)
|
|
535 |
{
|
|
536 |
size_t length = 0;
|
|
537 |
|
|
538 |
while (desc->address) {
|
|
539 |
length += SlCalcConvLen(desc->conv, NULL);
|
|
540 |
desc++;
|
|
541 |
}
|
|
542 |
return length;
|
|
543 |
}
|
|
544 |
|
|
545 |
// Save/Load a list of global variables
|
|
546 |
void SlGlobList(const SaveLoadGlobVarList *desc)
|
|
547 |
{
|
|
548 |
if (_sl.need_length != NL_NONE) {
|
|
549 |
SlSetLength(SlCalcGlobListLength(desc));
|
|
550 |
if (_sl.need_length == NL_CALCLENGTH)
|
|
551 |
return;
|
|
552 |
}
|
|
553 |
while (true) {
|
|
554 |
void *ptr = desc->address;
|
|
555 |
if (ptr == NULL)
|
|
556 |
break;
|
|
557 |
if(_sl.version >= desc->from_version && _sl.version <= desc->to_version)
|
|
558 |
SlSaveLoadConv(ptr, desc->conv);
|
|
559 |
desc++;
|
|
560 |
}
|
|
561 |
}
|
|
562 |
|
|
563 |
|
|
564 |
void SlAutolength(AutolengthProc *proc, void *arg)
|
|
565 |
{
|
|
566 |
uint32 offs;
|
|
567 |
|
|
568 |
assert(_sl.save);
|
|
569 |
|
|
570 |
// Tell it to calculate the length
|
|
571 |
_sl.need_length = NL_CALCLENGTH;
|
|
572 |
_sl.obj_len = 0;
|
|
573 |
proc(arg);
|
|
574 |
|
|
575 |
// Setup length
|
|
576 |
_sl.need_length = NL_WANTLENGTH;
|
|
577 |
SlSetLength(_sl.obj_len);
|
|
578 |
|
|
579 |
offs = SlGetOffs() + _sl.obj_len;
|
|
580 |
|
|
581 |
// And write the stuff
|
|
582 |
proc(arg);
|
|
583 |
|
|
584 |
assert(offs == SlGetOffs());
|
|
585 |
}
|
|
586 |
|
|
587 |
static void SlLoadChunk(const ChunkHandler *ch)
|
|
588 |
{
|
|
589 |
byte m = SlReadByte();
|
|
590 |
size_t len;
|
|
591 |
uint32 endoffs;
|
|
592 |
|
|
593 |
_sl.block_mode = m;
|
|
594 |
_sl.obj_len = 0;
|
|
595 |
|
|
596 |
switch(m) {
|
|
597 |
case CH_ARRAY:
|
|
598 |
_sl.array_index = 0;
|
|
599 |
ch->load_proc();
|
|
600 |
break;
|
|
601 |
|
|
602 |
case CH_SPARSE_ARRAY:
|
|
603 |
ch->load_proc();
|
|
604 |
break;
|
|
605 |
|
|
606 |
case CH_RIFF:
|
|
607 |
// Read length
|
|
608 |
len = SlReadByte() << 16;
|
|
609 |
len += SlReadUint16();
|
|
610 |
_sl.obj_len = len;
|
|
611 |
endoffs = SlGetOffs() + len;
|
|
612 |
ch->load_proc();
|
|
613 |
assert(SlGetOffs() == endoffs);
|
|
614 |
break;
|
|
615 |
default:
|
|
616 |
assert(0);
|
|
617 |
}
|
|
618 |
}
|
|
619 |
|
|
620 |
static ChunkSaveLoadProc *_tmp_proc_1;
|
|
621 |
|
|
622 |
static void SlStubSaveProc2(void *arg)
|
|
623 |
{
|
|
624 |
_tmp_proc_1();
|
|
625 |
}
|
|
626 |
|
|
627 |
static void SlStubSaveProc()
|
|
628 |
{
|
|
629 |
SlAutolength(SlStubSaveProc2, NULL);
|
|
630 |
}
|
|
631 |
|
|
632 |
static void SlSaveChunk(const ChunkHandler *ch)
|
|
633 |
{
|
|
634 |
ChunkSaveLoadProc *proc;
|
|
635 |
|
|
636 |
SlWriteUint32(ch->id);
|
|
637 |
|
|
638 |
proc = ch->save_proc;
|
|
639 |
if (ch->flags & CH_AUTO_LENGTH) {
|
|
640 |
// Need to calculate the length. Solve that by calling SlAutoLength in the save_proc.
|
|
641 |
_tmp_proc_1 = proc;
|
|
642 |
proc = SlStubSaveProc;
|
|
643 |
}
|
|
644 |
|
|
645 |
_sl.block_mode = ch->flags & CH_TYPE_MASK;
|
|
646 |
switch(ch->flags & CH_TYPE_MASK) {
|
|
647 |
case CH_RIFF:
|
|
648 |
_sl.need_length = NL_WANTLENGTH;
|
|
649 |
proc();
|
|
650 |
break;
|
|
651 |
case CH_ARRAY:
|
|
652 |
_sl.last_array_index = 0;
|
|
653 |
SlWriteByte(CH_ARRAY);
|
|
654 |
proc();
|
|
655 |
SlWriteArrayLength(0); // Terminate arrays
|
|
656 |
break;
|
|
657 |
case CH_SPARSE_ARRAY:
|
|
658 |
SlWriteByte(CH_SPARSE_ARRAY);
|
|
659 |
proc();
|
|
660 |
SlWriteArrayLength(0); // Terminate arrays
|
|
661 |
break;
|
|
662 |
default:
|
|
663 |
NOT_REACHED();
|
|
664 |
}
|
|
665 |
}
|
|
666 |
|
|
667 |
void SlSaveChunks()
|
|
668 |
{
|
|
669 |
const ChunkHandler *ch;
|
|
670 |
const ChunkHandler * const * chsc;
|
|
671 |
uint p;
|
|
672 |
|
|
673 |
for(p=0; p!=CH_NUM_PRI_LEVELS; p++) {
|
|
674 |
for(chsc=_sl.chs;(ch=*chsc++) != NULL;) {
|
|
675 |
while(true) {
|
|
676 |
if (((ch->flags >> CH_PRI_SHL) & (CH_NUM_PRI_LEVELS - 1)) == p)
|
|
677 |
SlSaveChunk(ch);
|
|
678 |
if (ch->flags & CH_LAST)
|
|
679 |
break;
|
|
680 |
ch++;
|
|
681 |
}
|
|
682 |
}
|
|
683 |
}
|
|
684 |
|
|
685 |
// Terminator
|
|
686 |
SlWriteUint32(0);
|
|
687 |
}
|
|
688 |
|
|
689 |
static const ChunkHandler *SlFindChunkHandler(uint32 id)
|
|
690 |
{
|
|
691 |
const ChunkHandler *ch;
|
|
692 |
const ChunkHandler * const * chsc;
|
|
693 |
for(chsc=_sl.chs;(ch=*chsc++) != NULL;) {
|
|
694 |
while(true) {
|
|
695 |
if (ch->id == id)
|
|
696 |
return ch;
|
|
697 |
if (ch->flags & CH_LAST)
|
|
698 |
break;
|
|
699 |
ch++;
|
|
700 |
}
|
|
701 |
}
|
|
702 |
return NULL;
|
|
703 |
}
|
|
704 |
|
|
705 |
void SlLoadChunks()
|
|
706 |
{
|
|
707 |
uint32 id;
|
|
708 |
const ChunkHandler *ch;
|
|
709 |
|
|
710 |
while(true) {
|
|
711 |
id = SlReadUint32();
|
|
712 |
if (id == 0)
|
|
713 |
return;
|
|
714 |
#if 0
|
|
715 |
printf("Loading chunk %c%c%c%c\n", id >> 24, id>>16, id>>8,id);
|
|
716 |
#endif
|
|
717 |
ch = SlFindChunkHandler(id);
|
|
718 |
if (ch == NULL) SlError("found unknown tag in savegame (sync error)");
|
|
719 |
SlLoadChunk(ch);
|
|
720 |
}
|
|
721 |
}
|
|
722 |
|
|
723 |
//*******************************************
|
|
724 |
//********** START OF LZO CODE **************
|
|
725 |
//*******************************************
|
|
726 |
#define LZO_SIZE 8192
|
|
727 |
|
|
728 |
int CDECL lzo1x_1_compress( const byte *src, uint src_len,byte *dst, uint *dst_len,void *wrkmem );
|
|
729 |
uint32 CDECL lzo_adler32(uint32 adler, const byte *buf, uint len);
|
|
730 |
int CDECL lzo1x_decompress( const byte *src, uint src_len,byte *dst, uint *dst_len,void *wrkmem /* NOT USED */ );
|
|
731 |
|
|
732 |
static uint ReadLZO()
|
|
733 |
{
|
|
734 |
byte out[LZO_SIZE + LZO_SIZE / 64 + 16 + 3 + 8];
|
|
735 |
uint32 tmp[2];
|
|
736 |
uint32 size;
|
|
737 |
uint len;
|
|
738 |
|
|
739 |
// Read header
|
|
740 |
if (fread(tmp, sizeof(tmp), 1, _sl.fh) != 1) SlError("file read failed");
|
|
741 |
|
|
742 |
// Check if size is bad
|
|
743 |
((uint32*)out)[0] = size = tmp[1];
|
|
744 |
|
|
745 |
if (_sl.version != 0) {
|
|
746 |
tmp[0] = TO_BE32(tmp[0]);
|
|
747 |
size = TO_BE32(size);
|
|
748 |
}
|
|
749 |
|
|
750 |
if (size >= sizeof(out)) SlError("inconsistent size");
|
|
751 |
|
|
752 |
// Read block
|
|
753 |
if (fread(out + sizeof(uint32), size, 1, _sl.fh) != 1) SlError("file read failed");
|
|
754 |
|
|
755 |
// Verify checksum
|
|
756 |
if (tmp[0] != lzo_adler32(0, out, size + sizeof(uint32))) SlError("bad checksum");
|
|
757 |
|
|
758 |
// Decompress
|
|
759 |
lzo1x_decompress(out + sizeof(uint32)*1, size, _sl.buf, &len, NULL);
|
|
760 |
return len;
|
|
761 |
}
|
|
762 |
|
|
763 |
// p contains the pointer to the buffer, len contains the pointer to the length.
|
|
764 |
// len bytes will be written, p and l will be updated to reflect the next buffer.
|
|
765 |
static void WriteLZO(uint size)
|
|
766 |
{
|
|
767 |
byte out[LZO_SIZE + LZO_SIZE / 64 + 16 + 3 + 8];
|
|
768 |
byte wrkmem[sizeof(byte*)*4096];
|
|
769 |
uint outlen;
|
|
770 |
|
|
771 |
lzo1x_1_compress(_sl.buf, size, out + sizeof(uint32)*2, &outlen, wrkmem);
|
|
772 |
((uint32*)out)[1] = TO_BE32(outlen);
|
|
773 |
((uint32*)out)[0] = TO_BE32(lzo_adler32(0, out + sizeof(uint32), outlen + sizeof(uint32)));
|
|
774 |
if (fwrite(out, outlen + sizeof(uint32)*2, 1, _sl.fh) != 1) SlError("file write failed");
|
|
775 |
}
|
|
776 |
|
|
777 |
static bool InitLZO() {
|
|
778 |
_sl.bufsize = LZO_SIZE;
|
|
779 |
_sl.buf = (byte*)malloc(LZO_SIZE);
|
|
780 |
return true;
|
|
781 |
}
|
|
782 |
|
|
783 |
static void UninitLZO() {
|
|
784 |
free(_sl.buf);
|
|
785 |
}
|
|
786 |
|
|
787 |
//*******************************************
|
|
788 |
//******** START OF NOCOMP CODE *************
|
|
789 |
//*******************************************
|
|
790 |
static uint ReadNoComp()
|
|
791 |
{
|
|
792 |
return fread(_sl.buf, 1, LZO_SIZE, _sl.fh);
|
|
793 |
}
|
|
794 |
|
|
795 |
static void WriteNoComp(uint size)
|
|
796 |
{
|
|
797 |
fwrite(_sl.buf, 1, size, _sl.fh);
|
|
798 |
}
|
|
799 |
|
|
800 |
static bool InitNoComp()
|
|
801 |
{
|
|
802 |
_sl.bufsize = LZO_SIZE;
|
|
803 |
_sl.buf = (byte*)malloc(LZO_SIZE);
|
|
804 |
return true;
|
|
805 |
}
|
|
806 |
|
|
807 |
static void UninitNoComp()
|
|
808 |
{
|
|
809 |
free(_sl.buf);
|
|
810 |
}
|
|
811 |
|
|
812 |
//********************************************
|
|
813 |
//********** START OF ZLIB CODE **************
|
|
814 |
//********************************************
|
|
815 |
|
|
816 |
#if defined(WITH_ZLIB)
|
|
817 |
#include <zlib.h>
|
|
818 |
static z_stream _z;
|
|
819 |
|
|
820 |
static bool InitReadZlib()
|
|
821 |
{
|
|
822 |
memset(&_z, 0, sizeof(_z));
|
|
823 |
if (inflateInit(&_z) != Z_OK) return false;
|
|
824 |
|
|
825 |
_sl.bufsize = 4096;
|
|
826 |
_sl.buf = (byte*)malloc(4096 + 4096); // also contains fread buffer
|
|
827 |
return true;
|
|
828 |
}
|
|
829 |
|
|
830 |
static uint ReadZlib()
|
|
831 |
{
|
|
832 |
int r;
|
|
833 |
|
|
834 |
_z.next_out = _sl.buf;
|
|
835 |
_z.avail_out = 4096;
|
|
836 |
|
|
837 |
do {
|
|
838 |
// read more bytes from the file?
|
|
839 |
if (_z.avail_in == 0) {
|
|
840 |
_z.avail_in = fread(_z.next_in = _sl.buf + 4096, 1, 4096, _sl.fh);
|
|
841 |
}
|
|
842 |
|
|
843 |
// inflate the data
|
|
844 |
r = inflate(&_z, 0);
|
|
845 |
if (r == Z_STREAM_END)
|
|
846 |
break;
|
|
847 |
|
|
848 |
if (r != Z_OK)
|
|
849 |
SlError("inflate() failed");
|
|
850 |
} while (_z.avail_out);
|
|
851 |
|
|
852 |
return 4096 - _z.avail_out;
|
|
853 |
}
|
|
854 |
|
|
855 |
static void UninitReadZlib()
|
|
856 |
{
|
|
857 |
inflateEnd(&_z);
|
|
858 |
free(_sl.buf);
|
|
859 |
}
|
|
860 |
|
|
861 |
static bool InitWriteZlib()
|
|
862 |
{
|
|
863 |
memset(&_z, 0, sizeof(_z));
|
|
864 |
if (deflateInit(&_z, 6) != Z_OK) return false;
|
|
865 |
|
|
866 |
_sl.bufsize = 4096;
|
|
867 |
_sl.buf = (byte*)malloc(4096); // also contains fread buffer
|
|
868 |
return true;
|
|
869 |
}
|
|
870 |
|
|
871 |
static void WriteZlibLoop(z_streamp z, byte *p, uint len, int mode)
|
|
872 |
{
|
|
873 |
char buf[1024]; // output buffer
|
|
874 |
int r;
|
|
875 |
uint n;
|
|
876 |
z->next_in = p;
|
|
877 |
z->avail_in = len;
|
|
878 |
do {
|
|
879 |
z->next_out = buf;
|
|
880 |
z->avail_out = sizeof(buf);
|
|
881 |
r = deflate(z, mode);
|
|
882 |
// bytes were emitted?
|
|
883 |
if ((n=sizeof(buf) - z->avail_out) != 0) {
|
|
884 |
if (fwrite(buf, n, 1, _sl.fh) != 1) SlError("file write error");
|
|
885 |
}
|
|
886 |
if (r == Z_STREAM_END)
|
|
887 |
break;
|
|
888 |
if (r != Z_OK) SlError("zlib returned error code");
|
|
889 |
} while (z->avail_in || !z->avail_out);
|
|
890 |
}
|
|
891 |
|
|
892 |
static void WriteZlib(uint len)
|
|
893 |
{
|
|
894 |
WriteZlibLoop(&_z, _sl.buf, len, 0);
|
|
895 |
}
|
|
896 |
|
|
897 |
static void UninitWriteZlib()
|
|
898 |
{
|
|
899 |
// flush any pending output.
|
|
900 |
if (_sl.fh) WriteZlibLoop(&_z, NULL, 0, Z_FINISH);
|
|
901 |
deflateEnd(&_z);
|
|
902 |
free(_sl.buf);
|
|
903 |
}
|
|
904 |
|
|
905 |
#endif //WITH_ZLIB
|
|
906 |
|
|
907 |
//*******************************************
|
|
908 |
//************* END OF CODE *****************
|
|
909 |
//*******************************************
|
|
910 |
|
|
911 |
// these define the chunks
|
|
912 |
extern const ChunkHandler _misc_chunk_handlers[];
|
|
913 |
extern const ChunkHandler _player_chunk_handlers[];
|
|
914 |
extern const ChunkHandler _veh_chunk_handlers[];
|
|
915 |
extern const ChunkHandler _town_chunk_handlers[];
|
|
916 |
extern const ChunkHandler _sign_chunk_handlers[];
|
|
917 |
extern const ChunkHandler _station_chunk_handlers[];
|
|
918 |
extern const ChunkHandler _industry_chunk_handlers[];
|
|
919 |
extern const ChunkHandler _engine_chunk_handlers[];
|
|
920 |
extern const ChunkHandler _economy_chunk_handlers[];
|
|
921 |
extern const ChunkHandler _animated_tile_chunk_handlers[];
|
|
922 |
|
|
923 |
static const ChunkHandler * const _chunk_handlers[] = {
|
|
924 |
_misc_chunk_handlers,
|
|
925 |
_veh_chunk_handlers,
|
|
926 |
_industry_chunk_handlers,
|
|
927 |
_economy_chunk_handlers,
|
|
928 |
_engine_chunk_handlers,
|
|
929 |
_town_chunk_handlers,
|
|
930 |
_sign_chunk_handlers,
|
|
931 |
_station_chunk_handlers,
|
|
932 |
_player_chunk_handlers,
|
|
933 |
_animated_tile_chunk_handlers,
|
|
934 |
NULL,
|
|
935 |
};
|
|
936 |
|
|
937 |
// used to include a vehicle desc in another desc.
|
|
938 |
extern const byte _common_veh_desc[];
|
|
939 |
static const byte * const _desc_includes[] = {
|
|
940 |
_common_veh_desc
|
|
941 |
};
|
|
942 |
|
|
943 |
typedef struct {
|
|
944 |
void *base;
|
|
945 |
size_t size;
|
|
946 |
} ReferenceSetup;
|
|
947 |
|
|
948 |
// used to translate "pointers"
|
|
949 |
static const ReferenceSetup _ref_setup[] = {
|
|
950 |
{_order_array,sizeof(_order_array[0])},
|
|
951 |
{_vehicles,sizeof(_vehicles[0])},
|
|
952 |
{_stations,sizeof(_stations[0])},
|
|
953 |
{_towns,sizeof(_towns[0])},
|
|
954 |
};
|
|
955 |
|
|
956 |
uint ReferenceToInt(void *v, uint t)
|
|
957 |
{
|
|
958 |
if (v == NULL) return 0;
|
|
959 |
return ((byte*)v - (byte*)_ref_setup[t].base) / _ref_setup[t].size + 1;
|
|
960 |
}
|
|
961 |
|
|
962 |
void *IntToReference(uint r, uint t)
|
|
963 |
{
|
|
964 |
if (r == 0) return NULL;
|
|
965 |
return (byte*)_ref_setup[t].base + (r-1) * _ref_setup[t].size;
|
|
966 |
}
|
|
967 |
|
|
968 |
typedef struct {
|
|
969 |
const char *name;
|
|
970 |
uint32 tag;
|
|
971 |
|
|
972 |
bool (*init_read)();
|
|
973 |
ReaderProc *reader;
|
|
974 |
void (*uninit_read)();
|
|
975 |
|
|
976 |
bool (*init_write)();
|
|
977 |
WriterProc *writer;
|
|
978 |
void (*uninit_write)();
|
|
979 |
|
|
980 |
} SaveLoadFormat;
|
|
981 |
|
|
982 |
static const SaveLoadFormat _saveload_formats[] = {
|
|
983 |
{"lzo", TO_BE32X('OTTD'), InitLZO,ReadLZO, UninitLZO, InitLZO, WriteLZO, UninitLZO},
|
|
984 |
{"none", TO_BE32X('OTTN'), InitNoComp,ReadNoComp, UninitNoComp, InitNoComp, WriteNoComp, UninitNoComp},
|
|
985 |
#if defined(WITH_ZLIB)
|
|
986 |
{"zlib", TO_BE32X('OTTZ'), InitReadZlib,ReadZlib, UninitReadZlib, InitWriteZlib, WriteZlib, UninitWriteZlib},
|
|
987 |
#else
|
|
988 |
{"zlib", TO_BE32X('OTTZ'), NULL,NULL,NULL,NULL,NULL,NULL}
|
|
989 |
#endif
|
|
990 |
};
|
|
991 |
|
|
992 |
static const SaveLoadFormat *GetSavegameFormat(const char *s)
|
|
993 |
{
|
|
994 |
const SaveLoadFormat *def;
|
|
995 |
int i;
|
|
996 |
|
|
997 |
// find default savegame format
|
|
998 |
def = endof(_saveload_formats) - 1;
|
|
999 |
while (!def->init_write) def--;
|
|
1000 |
|
|
1001 |
if (_savegame_format[0]) {
|
|
1002 |
for(i = 0; i!=lengthof(_saveload_formats); i++)
|
|
1003 |
if (_saveload_formats[i].init_write && !strcmp(s, _saveload_formats[i].name))
|
|
1004 |
return _saveload_formats + i;
|
|
1005 |
|
|
1006 |
ShowInfoF("Savegame format '%s' is not available. Reverting to '%s'.", s, def->name);
|
|
1007 |
}
|
|
1008 |
return def;
|
|
1009 |
}
|
|
1010 |
|
|
1011 |
// actual loader/saver function
|
|
1012 |
extern void InitializeGame();
|
|
1013 |
extern bool AfterLoadGame(uint version);
|
|
1014 |
extern void BeforeSaveGame();
|
|
1015 |
extern bool LoadOldSaveGame(const char *file);
|
|
1016 |
|
|
1017 |
// Save or Load files SL_LOAD, SL_SAVE, SL_OLD_LOAD
|
|
1018 |
int SaveOrLoad(const char *filename, int mode)
|
|
1019 |
{
|
|
1020 |
uint32 hdr[2];
|
|
1021 |
const SaveLoadFormat *fmt;
|
|
1022 |
uint version;
|
|
1023 |
|
|
1024 |
// old style load
|
|
1025 |
if (mode == SL_OLD_LOAD) {
|
|
1026 |
InitializeGame();
|
|
1027 |
if (!LoadOldSaveGame(filename)) return SL_REINIT;
|
|
1028 |
AfterLoadGame(0);
|
|
1029 |
return SL_OK;
|
|
1030 |
}
|
|
1031 |
|
|
1032 |
_sl.fh = fopen(filename, mode?"wb":"rb");
|
|
1033 |
if (_sl.fh == NULL)
|
|
1034 |
return SL_ERROR;
|
|
1035 |
|
|
1036 |
_sl.bufe = _sl.bufp = NULL;
|
|
1037 |
_sl.offs_base = 0;
|
|
1038 |
_sl.int_to_ref_proc = IntToReference;
|
|
1039 |
_sl.ref_to_int_proc = ReferenceToInt;
|
|
1040 |
_sl.save = mode;
|
|
1041 |
_sl.includes = _desc_includes;
|
|
1042 |
_sl.chs = _chunk_handlers;
|
|
1043 |
|
|
1044 |
// setup setjmp error handler
|
|
1045 |
if (setjmp(_sl.excpt)) {
|
|
1046 |
// close file handle.
|
|
1047 |
fclose(_sl.fh); _sl.fh = NULL;
|
|
1048 |
|
|
1049 |
// deinitialize compressor.
|
|
1050 |
_sl.excpt_uninit();
|
|
1051 |
|
|
1052 |
// a saver/loader exception!!
|
|
1053 |
// reinitialize all variables to prevent crash!
|
|
1054 |
if (mode == SL_LOAD) {
|
|
1055 |
ShowInfoF("Load game failed: %s.", _sl.excpt_msg);
|
|
1056 |
return SL_REINIT;
|
|
1057 |
} else {
|
|
1058 |
ShowInfoF("Save game failed: %s.", _sl.excpt_msg);
|
|
1059 |
return SL_ERROR;
|
|
1060 |
}
|
|
1061 |
}
|
|
1062 |
|
|
1063 |
// we first initialize here to avoid: "warning: variable `version' might
|
|
1064 |
// be clobbered by `longjmp' or `vfork'"
|
|
1065 |
version = 0;
|
|
1066 |
|
|
1067 |
if (mode != SL_LOAD) {
|
|
1068 |
fmt = GetSavegameFormat(_savegame_format);
|
|
1069 |
|
|
1070 |
_sl.write_bytes = fmt->writer;
|
|
1071 |
_sl.excpt_uninit = fmt->uninit_write;
|
|
1072 |
if (!fmt->init_write()) goto init_err;
|
|
1073 |
|
|
1074 |
hdr[0] = fmt->tag;
|
|
1075 |
hdr[1] = TO_BE32((SAVEGAME_MAJOR_VERSION<<16) + (SAVEGAME_MINOR_VERSION << 8));
|
|
1076 |
if (fwrite(hdr, sizeof(hdr), 1, _sl.fh) != 1) SlError("file write failed");
|
|
1077 |
|
|
1078 |
_sl.version = SAVEGAME_MAJOR_VERSION;
|
|
1079 |
|
|
1080 |
BeforeSaveGame();
|
|
1081 |
SlSaveChunks();
|
|
1082 |
SlWriteFill(); // flush the save buffer
|
|
1083 |
fmt->uninit_write();
|
|
1084 |
|
|
1085 |
} else {
|
|
1086 |
if (fread(hdr, sizeof(hdr), 1, _sl.fh) != 1) {
|
|
1087 |
read_err:
|
|
1088 |
printf("Savegame is obsolete or invalid format.\n");
|
|
1089 |
init_err:
|
|
1090 |
fclose(_sl.fh);
|
|
1091 |
return SL_ERROR;
|
|
1092 |
}
|
|
1093 |
|
|
1094 |
// see if we have any loader for this type.
|
|
1095 |
for(fmt = _saveload_formats; ; fmt++) {
|
|
1096 |
if (fmt == endof(_saveload_formats)) {
|
|
1097 |
printf("Unknown savegame type, trying to load it as the buggy format.\n");
|
|
1098 |
rewind(_sl.fh);
|
|
1099 |
_sl.version = 0;
|
|
1100 |
version = 0;
|
|
1101 |
fmt = _saveload_formats + 0; // lzo
|
|
1102 |
break;
|
|
1103 |
}
|
|
1104 |
if (fmt->tag == hdr[0]) {
|
|
1105 |
// check version number
|
|
1106 |
version = TO_BE32(hdr[1]) >> 8;
|
|
1107 |
|
|
1108 |
// incompatible version?
|
|
1109 |
if (version > SAVEGAME_LOADABLE_VERSION) goto read_err;
|
|
1110 |
_sl.version = (version>>8);
|
|
1111 |
break;
|
|
1112 |
}
|
|
1113 |
}
|
|
1114 |
|
|
1115 |
_sl.read_bytes = fmt->reader;
|
|
1116 |
_sl.excpt_uninit = fmt->uninit_read;
|
|
1117 |
|
|
1118 |
// loader for this savegame type is not implemented?
|
|
1119 |
if (fmt->init_read == NULL) {
|
|
1120 |
ShowInfoF("Loader for '%s' is not available.", fmt->name);
|
|
1121 |
fclose(_sl.fh);
|
|
1122 |
return SL_ERROR;
|
|
1123 |
}
|
|
1124 |
|
|
1125 |
if (!fmt->init_read()) goto init_err;
|
|
1126 |
// Clear everything
|
|
1127 |
InitializeGame();
|
|
1128 |
SlLoadChunks();
|
|
1129 |
fmt->uninit_read();
|
|
1130 |
}
|
|
1131 |
|
|
1132 |
fclose(_sl.fh);
|
|
1133 |
|
|
1134 |
if (mode == SL_LOAD) {
|
|
1135 |
if (!AfterLoadGame(version))
|
|
1136 |
return SL_REINIT;
|
|
1137 |
}
|
|
1138 |
|
|
1139 |
return SL_OK;
|
|
1140 |
}
|
|
1141 |
|
|
1142 |
bool EmergencySave()
|
|
1143 |
{
|
|
1144 |
SaveOrLoad("crash.sav", SL_SAVE);
|
|
1145 |
return true;
|
|
1146 |
}
|
|
1147 |
|
|
1148 |
// not used right now, but could be used if extensions of savegames are garbled
|
|
1149 |
/*int GetSavegameType(char *file)
|
|
1150 |
{
|
|
1151 |
const SaveLoadFormat *fmt;
|
|
1152 |
uint32 hdr;
|
|
1153 |
FILE *f;
|
|
1154 |
int mode = SL_OLD_LOAD;
|
|
1155 |
|
|
1156 |
f = fopen(file, "rb");
|
|
1157 |
if (fread(&hdr, sizeof(hdr), 1, f) != 1) {
|
|
1158 |
printf("Savegame is obsolete or invalid format.\n");
|
|
1159 |
mode = SL_LOAD; // don't try to get filename, just show name as it is written
|
|
1160 |
}
|
|
1161 |
else {
|
|
1162 |
// see if we have any loader for this type.
|
|
1163 |
for (fmt = _saveload_formats; fmt != endof(_saveload_formats); fmt++) {
|
|
1164 |
if (fmt->tag == hdr) {
|
|
1165 |
mode = SL_LOAD; // new type of savegame
|
|
1166 |
break;
|
|
1167 |
}
|
|
1168 |
}
|
|
1169 |
}
|
|
1170 |
|
|
1171 |
fclose(f);
|
|
1172 |
return mode;
|
|
1173 |
}*/
|