#include "stdafx.h"
#include "ttd.h"
#include "vehicle.h"
#include "station.h"
#include "town.h"
#include "player.h"
#include "saveload.h"
enum {
SAVEGAME_MAJOR_VERSION = 5,
SAVEGAME_MINOR_VERSION = 2,
SAVEGAME_LOADABLE_VERSION = (SAVEGAME_MAJOR_VERSION << 8) + SAVEGAME_MINOR_VERSION
};
/******************************************************/
/******************************************************/
/******************************************************/
enum NeedLengthValues { NL_NONE = 0,NL_WANTLENGTH = 1,NL_CALCLENGTH = 2};
SaverLoader _sl;
// fill the input buffer
static void SlReadFill(void)
{
uint len = _sl.read_bytes();
assert(len != 0);
_sl.bufp = _sl.buf;
_sl.bufe = _sl.buf + len;
_sl.offs_base += len;
}
static uint32 SlGetOffs(void)
{
return _sl.offs_base - (_sl.bufe - _sl.bufp);
}
// flush the output buffer
static void SlWriteFill(void)
{
// flush current buffer?
if (_sl.bufp != NULL) {
uint len = _sl.bufp - _sl.buf;
_sl.offs_base += len;
if (len) _sl.write_bytes(len);
}
// setup next buffer
_sl.bufp = _sl.buf;
_sl.bufe = _sl.buf + _sl.bufsize;
}
// error handler, calls longjmp to simulate an exception.
static void NORETURN SlError(const char *msg)
{
_sl.excpt_msg = msg;
longjmp(_sl.excpt, 0);
}
int SlReadByte(void)
{
if (_sl.bufp == _sl.bufe) SlReadFill();
return *_sl.bufp++;
}
void SlWriteByte(byte v)
{
if (_sl.bufp == _sl.bufe) SlWriteFill();
*_sl.bufp++ = v;
}
static int SlReadUint16(void)
{
int x = SlReadByte() << 8;
return x | SlReadByte();
}
static uint32 SlReadUint32(void)
{
uint32 x = SlReadUint16() << 16;
return x | SlReadUint16();
}
static uint64 SlReadUint64(void)
{
uint32 x = SlReadUint32();
uint32 y = SlReadUint32();
return (uint64)x << 32 | y;
}
static void SlWriteUint16(uint16 v)
{
SlWriteByte((byte)(v >> 8));
SlWriteByte((byte)v);
}
static void SlWriteUint32(uint32 v)
{
SlWriteUint16((uint16)(v >> 16));
SlWriteUint16((uint16)v);
}
static void SlWriteUint64(uint64 x)
{
SlWriteUint32((uint32)(x >> 32));
SlWriteUint32((uint32)x);
}
static int SlReadSimpleGamma(void)
{
int x = SlReadByte();
if (x & 0x80)
x = ((x&0x7F) << 8) + SlReadByte();
return x;
}
static void SlWriteSimpleGamma(uint i)
{
assert(i < (1 << 14));
if (i >= 0x80) {
SlWriteByte((byte)(0x80|(i >> 8)));
SlWriteByte((byte)i);
} else {
SlWriteByte(i);
}
}
static uint SlGetGammaLength(uint i) {
return (i>=0x80) ? 2 : 1;
}
static inline int SlReadSparseIndex(void)
{
return SlReadSimpleGamma();
}
static inline void SlWriteSparseIndex(uint index)
{
SlWriteSimpleGamma(index);
}
static inline int SlReadArrayLength(void)
{
return SlReadSimpleGamma();
}
static inline void SlWriteArrayLength(uint length)
{
SlWriteSimpleGamma(length);
}
void SlSetArrayIndex(uint index)
{
_sl.need_length = NL_WANTLENGTH;
_sl.array_index = index;
}
int SlIterateArray(void)
{
int ind;
static uint32 next_offs;
// Must be at end of current block.
assert(next_offs == 0 || SlGetOffs() == next_offs);
while(true) {
uint len = SlReadArrayLength();
if (len == 0) {
next_offs = 0;
return -1;
}
_sl.obj_len = --len;
next_offs = SlGetOffs() + len;
switch(_sl.block_mode) {
case CH_SPARSE_ARRAY: ind = SlReadSparseIndex(); break;
case CH_ARRAY: ind = _sl.array_index++; break;
default:
DEBUG(misc, 0) ("SlIterateArray: error\n");
return -1; // error
}
if (len != 0)
return ind;
}
}
// Sets the length of either a RIFF object or the number of items in an array.
void SlSetLength(uint length)
{
switch(_sl.need_length) {
case NL_WANTLENGTH:
_sl.need_length = NL_NONE;
switch(_sl.block_mode) {
case CH_RIFF:
// Really simple to write a RIFF length :)
SlWriteUint32(length);
break;
case CH_ARRAY:
assert(_sl.array_index >= _sl.last_array_index);
while (++_sl.last_array_index <= _sl.array_index)
SlWriteArrayLength(1);
SlWriteArrayLength(length + 1);
break;
case CH_SPARSE_ARRAY:
SlWriteArrayLength(length + 1 + SlGetGammaLength(_sl.array_index)); // Also include length of sparse index.
SlWriteSparseIndex(_sl.array_index);
break;
default: NOT_REACHED();
}
break;
case NL_CALCLENGTH:
_sl.obj_len += length;
break;
}
}
static void SlCopyBytes(void *ptr, size_t length)
{
byte *p = (byte*)ptr;
if (_sl.save) {
while(length) {
SlWriteByte(*p++);
length--;
}
} else {
while(length) {
// INLINED SlReadByte
#if !defined(_DEBUG)
if (_sl.bufp == _sl.bufe) SlReadFill();
*p++ = *_sl.bufp++;
#else
*p++ = SlReadByte();
#endif
length--;
}
}
}
static void SlSkipBytes(size_t length)
{
while (length) {
SlReadByte();
length--;
}
}
uint SlGetFieldLength(void)
{
return _sl.obj_len;
}
static void SlSaveLoadConv(void *ptr, uint conv)
{
int64 x = 0;
if (_sl.save) {
// Read a value from the struct. These ARE endian safe.
switch((conv >> 4)&0xf) {
case SLE_VAR_I8>>4: x = *(int8*)ptr; break;
case SLE_VAR_U8>>4: x = *(byte*)ptr; break;
case SLE_VAR_I16>>4: x = *(int16*)ptr; break;
case SLE_VAR_U16>>4: x = *(uint16*)ptr; break;
case SLE_VAR_I32>>4: x = *(int32*)ptr; break;
case SLE_VAR_U32>>4: x = *(uint32*)ptr; break;
case SLE_VAR_I64>>4: x = *(int64*)ptr; break;
case SLE_VAR_U64>>4: x = *(uint64*)ptr; break;
case SLE_VAR_NULL>>4: x = 0; break;
default:
NOT_REACHED();
}
// Write it to the file
switch(conv & 0xF) {
case SLE_FILE_I8: assert(x >= -128 && x <= 127); SlWriteByte(x);break;
case SLE_FILE_U8: assert(x >= 0 && x <= 255); SlWriteByte(x);break;
case SLE_FILE_I16:assert(x >= -32768 && x <= 32767); SlWriteUint16(x);break;
case SLE_FILE_STRINGID:
case SLE_FILE_U16:assert(x >= 0 && x <= 65535); SlWriteUint16(x);break;
case SLE_FILE_I32:
case SLE_FILE_U32:SlWriteUint32((uint32)x);break;
case SLE_FILE_I64:
case SLE_FILE_U64:SlWriteUint64(x);break;
default:
assert(0);
NOT_REACHED();
}
} else {
// Read a value from the file
switch(conv & 0xF) {
case SLE_FILE_I8: x = (int8)SlReadByte(); break;
case SLE_FILE_U8: x = (byte)SlReadByte(); break;
case SLE_FILE_I16: x = (int16)SlReadUint16(); break;
case SLE_FILE_U16: x = (uint16)SlReadUint16(); break;
case SLE_FILE_I32: x = (int32)SlReadUint32(); break;
case SLE_FILE_U32: x = (uint32)SlReadUint32(); break;
case SLE_FILE_I64: x = (int64)SlReadUint64(); break;
case SLE_FILE_U64: x = (uint64)SlReadUint64(); break;
case SLE_FILE_STRINGID: x = RemapOldStringID((uint16)SlReadUint16()); break;
default:
assert(0);
NOT_REACHED();
}
// Write it to the struct, these ARE endian safe.
switch((conv >> 4)&0xf) {
case SLE_VAR_I8>>4: *(int8*)ptr = x; break;
case SLE_VAR_U8>>4: *(byte*)ptr = x; break;
case SLE_VAR_I16>>4: *(int16*)ptr = x; break;
case SLE_VAR_U16>>4: *(uint16*)ptr = x; break;
case SLE_VAR_I32>>4: *(int32*)ptr = x; break;
case SLE_VAR_U32>>4: *(uint32*)ptr = x; break;
case SLE_VAR_I64>>4: *(int64*)ptr = x; break;
case SLE_VAR_U64>>4: *(uint64*)ptr = x; break;
case SLE_VAR_NULL: break;
default:
NOT_REACHED();
}
}
}
static const byte _conv_lengths[] = {1,1,2,2,4,4,8,8,2};
static uint SlCalcConvLen(uint conv, void *p)
{
return _conv_lengths[conv & 0xF];
}
static uint SlCalcArrayLen(void *array, uint length, uint conv)
{
return _conv_lengths[conv & 0xF] * length;
}
static const byte _conv_mem_size[9] = {1,1,2,2,4,4,8,8,0};
void SlArray(void *array, uint length, uint conv)
{
// Automatically calculate the length?
if (_sl.need_length != NL_NONE) {
SlSetLength(SlCalcArrayLen(array, length, conv));
// Determine length only?
if (_sl.need_length == NL_CALCLENGTH)
return;
}
// handle buggy stuff
if (!_sl.save && _sl.version == 0) {
if (conv == SLE_INT16 || conv == SLE_UINT16 || conv == SLE_STRINGID) {
length *= 2;
conv = SLE_INT8;
} else if (conv == SLE_INT32 || conv == SLE_UINT32) {
length *= 4;
conv = SLE_INT8;
}
}
// Optimized cases when input equals output.
switch(conv) {
case SLE_INT8:
case SLE_UINT8:SlCopyBytes(array, length);break;
default: {
// Default "slow" case.
byte *a = (byte*)array;
while (length) {
SlSaveLoadConv(a, conv);
a += _conv_mem_size[(conv >> 4)&0xf];
length--;
}
}
}
}
// Calculate the size of an object.
static size_t SlCalcObjLength(void *object, const void *desc)
{
size_t length = 0;
uint cmd,conv;
const byte *d = (const byte*)desc;
// Need to determine the length and write a length tag.
while (true) {
cmd = (d[0] >> 4);
if (cmd < 8) {
conv = d[2];
d += 3;
if (cmd&4) {
d += 2;
// check if the field is of the right version
if (_sl.version < d[-2] || _sl.version > d[-1]) {
if ((cmd & 3) == 2) d++;
continue;
}
}
switch(cmd&3) {
// Normal variable
case 0: length += SlCalcConvLen(conv, NULL);break;
// Reference
case 1: length += 2; break;
// Array
case 2: length += SlCalcArrayLen(NULL, *d++, conv); break;
default:NOT_REACHED();
}
} else if (cmd == 8) {
length++;
d += 4;
} else if (cmd == 9) {
length += SlCalcObjLength(NULL, _sl.includes[d[2]]);
d += 3;
} else if (cmd == 15)
break;
else
assert(0);
}
return length;
}
void SlObject(void *object, const void *desc)
{
const byte *d = (const byte*)desc;
void *ptr;
uint cmd,conv;
// Automatically calculate the length?
if (_sl.need_length != NL_NONE) {
SlSetLength(SlCalcObjLength(object, d));
if (_sl.need_length == NL_CALCLENGTH)
return;
}
while (true) {
// Currently it only supports up to 4096 byte big objects
ptr = (byte*)object + (d[0] & 0xF) + (d[1] << 4);
cmd = d[0] >> 4;
if (cmd < 8) {
conv = d[2];
d += 3;
if (cmd&4) {
d += 2;
// check if the field is of the right version
if (_sl.version < d[-2] || _sl.version > d[-1]) {
if ((cmd & 3) == 2) d++;
continue;
}
}
switch(cmd&3) {
// Normal variable
case 0: SlSaveLoadConv(ptr, conv); break;
// Reference
case 1:
if (_sl.save) {
SlWriteUint16(_sl.ref_to_int_proc(*(void**)ptr, conv));
} else {
*(void**)ptr = _sl.int_to_ref_proc(SlReadUint16(), conv);
}
break;
// Array
case 2: SlArray(ptr, *d++, conv); break;
default:NOT_REACHED();
}
// Write byte.
} else if (cmd == 8) {
if (_sl.save) {
SlWriteByte(d[3]);
} else {
*(byte*)ptr = d[2];
}
d += 4;
// Include
} else if (cmd == 9) {
SlObject(ptr, _sl.includes[d[2]]);
d += 3;
} else if (cmd == 15)
break;
else
assert(0);
}
}
static size_t SlCalcGlobListLength(const SaveLoadGlobVarList *desc)
{
size_t length = 0;
while (desc->address) {
if(_sl.version >= desc->from_version && _sl.version <= desc->to_version)
length += SlCalcConvLen(desc->conv, NULL);
desc++;
}
return length;
}
// Save/Load a list of global variables
void SlGlobList(const SaveLoadGlobVarList *desc)
{
if (_sl.need_length != NL_NONE) {
SlSetLength(SlCalcGlobListLength(desc));
if (_sl.need_length == NL_CALCLENGTH)
return;
}
while (true) {
void *ptr = desc->address;
if (ptr == NULL)
break;
if(_sl.version >= desc->from_version && _sl.version <= desc->to_version)
SlSaveLoadConv(ptr, desc->conv);
desc++;
}
}
void SlAutolength(AutolengthProc *proc, void *arg)
{
uint32 offs;
assert(_sl.save);
// Tell it to calculate the length
_sl.need_length = NL_CALCLENGTH;
_sl.obj_len = 0;
proc(arg);
// Setup length
_sl.need_length = NL_WANTLENGTH;
SlSetLength(_sl.obj_len);
offs = SlGetOffs() + _sl.obj_len;
// And write the stuff
proc(arg);
assert(offs == SlGetOffs());
}
static void SlLoadChunk(const ChunkHandler *ch)
{
byte m = SlReadByte();
size_t len;
uint32 endoffs;
_sl.block_mode = m;
_sl.obj_len = 0;
switch(m) {
case CH_ARRAY:
_sl.array_index = 0;
ch->load_proc();
break;
case CH_SPARSE_ARRAY:
ch->load_proc();
break;
case CH_RIFF:
// Read length
len = SlReadByte() << 16;
len += SlReadUint16();
_sl.obj_len = len;
endoffs = SlGetOffs() + len;
ch->load_proc();
assert(SlGetOffs() == endoffs);
break;
default:
assert(0);
}
}
static ChunkSaveLoadProc *_tmp_proc_1;
static void SlStubSaveProc2(void *arg)
{
_tmp_proc_1();
}
static void SlStubSaveProc(void)
{
SlAutolength(SlStubSaveProc2, NULL);
}
static void SlSaveChunk(const ChunkHandler *ch)
{
ChunkSaveLoadProc *proc;
SlWriteUint32(ch->id);
proc = ch->save_proc;
if (ch->flags & CH_AUTO_LENGTH) {
// Need to calculate the length. Solve that by calling SlAutoLength in the save_proc.
_tmp_proc_1 = proc;
proc = SlStubSaveProc;
}
_sl.block_mode = ch->flags & CH_TYPE_MASK;
switch(ch->flags & CH_TYPE_MASK) {
case CH_RIFF:
_sl.need_length = NL_WANTLENGTH;
proc();
break;
case CH_ARRAY:
_sl.last_array_index = 0;
SlWriteByte(CH_ARRAY);
proc();
SlWriteArrayLength(0); // Terminate arrays
break;
case CH_SPARSE_ARRAY:
SlWriteByte(CH_SPARSE_ARRAY);
proc();
SlWriteArrayLength(0); // Terminate arrays
break;
default:
NOT_REACHED();
}
}
static void SlSaveChunks(void)
{
const ChunkHandler *ch;
const ChunkHandler * const * chsc;
uint p;
for(p=0; p!=CH_NUM_PRI_LEVELS; p++) {
for(chsc=_sl.chs;(ch=*chsc++) != NULL;) {
while(true) {
if (((ch->flags >> CH_PRI_SHL) & (CH_NUM_PRI_LEVELS - 1)) == p)
SlSaveChunk(ch);
if (ch->flags & CH_LAST)
break;
ch++;
}
}
}
// Terminator
SlWriteUint32(0);
}
static const ChunkHandler *SlFindChunkHandler(uint32 id)
{
const ChunkHandler *ch;
const ChunkHandler * const * chsc;
for(chsc=_sl.chs;(ch=*chsc++) != NULL;) {
while(true) {
if (ch->id == id)
return ch;
if (ch->flags & CH_LAST)
break;
ch++;
}
}
return NULL;
}
static void SlLoadChunks(void)
{
uint32 id;
const ChunkHandler *ch;
while(true) {
id = SlReadUint32();
if (id == 0)
return;
#if 0
printf("Loading chunk %c%c%c%c\n", id >> 24, id>>16, id>>8,id);
#endif
ch = SlFindChunkHandler(id);
if (ch == NULL) SlError("found unknown tag in savegame (sync error)");
SlLoadChunk(ch);
}
}
//*******************************************
//********** START OF LZO CODE **************
//*******************************************
#define LZO_SIZE 8192
#include "minilzo.h"
static uint ReadLZO(void)
{
byte out[LZO_SIZE + LZO_SIZE / 64 + 16 + 3 + 8];
uint32 tmp[2];
uint32 size;
uint len;
// Read header
if (fread(tmp, sizeof(tmp), 1, _sl.fh) != 1) SlError("file read failed");
// Check if size is bad
((uint32*)out)[0] = size = tmp[1];
if (_sl.version != 0) {
tmp[0] = TO_BE32(tmp[0]);
size = TO_BE32(size);
}
if (size >= sizeof(out)) SlError("inconsistent size");
// Read block
if (fread(out + sizeof(uint32), size, 1, _sl.fh) != 1) SlError("file read failed");
// Verify checksum
if (tmp[0] != lzo_adler32(0, out, size + sizeof(uint32))) SlError("bad checksum");
// Decompress
lzo1x_decompress(out + sizeof(uint32)*1, size, _sl.buf, &len, NULL);
return len;
}
// p contains the pointer to the buffer, len contains the pointer to the length.
// len bytes will be written, p and l will be updated to reflect the next buffer.
static void WriteLZO(uint size)
{
byte out[LZO_SIZE + LZO_SIZE / 64 + 16 + 3 + 8];
byte wrkmem[sizeof(byte*)*4096];
uint outlen;
lzo1x_1_compress(_sl.buf, size, out + sizeof(uint32)*2, &outlen, wrkmem);
((uint32*)out)[1] = TO_BE32(outlen);
((uint32*)out)[0] = TO_BE32(lzo_adler32(0, out + sizeof(uint32), outlen + sizeof(uint32)));
if (fwrite(out, outlen + sizeof(uint32)*2, 1, _sl.fh) != 1) SlError("file write failed");
}
static bool InitLZO(void)
{
_sl.bufsize = LZO_SIZE;
_sl.buf = (byte*)malloc(LZO_SIZE);
return true;
}
static void UninitLZO(void)
{
free(_sl.buf);
}
//*******************************************
//******** START OF NOCOMP CODE *************
//*******************************************
static uint ReadNoComp(void)
{
return fread(_sl.buf, 1, LZO_SIZE, _sl.fh);
}
static void WriteNoComp(uint size)
{
fwrite(_sl.buf, 1, size, _sl.fh);
}
static bool InitNoComp(void)
{
_sl.bufsize = LZO_SIZE;
_sl.buf = (byte*)malloc(LZO_SIZE);
return true;
}
static void UninitNoComp(void)
{
free(_sl.buf);
}
//********************************************
//********** START OF ZLIB CODE **************
//********************************************
#if defined(WITH_ZLIB)
#include <zlib.h>
static z_stream _z;
static bool InitReadZlib(void)
{
memset(&_z, 0, sizeof(_z));
if (inflateInit(&_z) != Z_OK) return false;
_sl.bufsize = 4096;
_sl.buf = (byte*)malloc(4096 + 4096); // also contains fread buffer
return true;
}
static uint ReadZlib(void)
{
int r;
_z.next_out = _sl.buf;
_z.avail_out = 4096;
do {
// read more bytes from the file?
if (_z.avail_in == 0) {
_z.avail_in = fread(_z.next_in = _sl.buf + 4096, 1, 4096, _sl.fh);
}
// inflate the data
r = inflate(&_z, 0);
if (r == Z_STREAM_END)
break;
if (r != Z_OK)
SlError("inflate() failed");
} while (_z.avail_out);
return 4096 - _z.avail_out;
}
static void UninitReadZlib(void)
{
inflateEnd(&_z);
free(_sl.buf);
}
static bool InitWriteZlib(void)
{
memset(&_z, 0, sizeof(_z));
if (deflateInit(&_z, 6) != Z_OK) return false;
_sl.bufsize = 4096;
_sl.buf = (byte*)malloc(4096); // also contains fread buffer
return true;
}
static void WriteZlibLoop(z_streamp z, byte *p, uint len, int mode)
{
char buf[1024]; // output buffer
int r;
uint n;
z->next_in = p;
z->avail_in = len;
do {
z->next_out = buf;
z->avail_out = sizeof(buf);
r = deflate(z, mode);
// bytes were emitted?
if ((n=sizeof(buf) - z->avail_out) != 0) {
if (fwrite(buf, n, 1, _sl.fh) != 1) SlError("file write error");
}
if (r == Z_STREAM_END)
break;
if (r != Z_OK) SlError("zlib returned error code");
} while (z->avail_in || !z->avail_out);
}
static void WriteZlib(uint len)
{
WriteZlibLoop(&_z, _sl.buf, len, 0);
}
static void UninitWriteZlib(void)
{
// flush any pending output.
if (_sl.fh) WriteZlibLoop(&_z, NULL, 0, Z_FINISH);
deflateEnd(&_z);
free(_sl.buf);
}
#endif //WITH_ZLIB
//*******************************************
//************* END OF CODE *****************
//*******************************************
// these define the chunks
extern const ChunkHandler _misc_chunk_handlers[];
extern const ChunkHandler _player_chunk_handlers[];
extern const ChunkHandler _veh_chunk_handlers[];
extern const ChunkHandler _order_chunk_handlers[];
extern const ChunkHandler _town_chunk_handlers[];
extern const ChunkHandler _sign_chunk_handlers[];
extern const ChunkHandler _station_chunk_handlers[];
extern const ChunkHandler _industry_chunk_handlers[];
extern const ChunkHandler _engine_chunk_handlers[];
extern const ChunkHandler _economy_chunk_handlers[];
extern const ChunkHandler _animated_tile_chunk_handlers[];
static const ChunkHandler * const _chunk_handlers[] = {
_misc_chunk_handlers,
_veh_chunk_handlers,
_order_chunk_handlers,
_industry_chunk_handlers,
_economy_chunk_handlers,
_engine_chunk_handlers,
_town_chunk_handlers,
_sign_chunk_handlers,
_station_chunk_handlers,
_player_chunk_handlers,
_animated_tile_chunk_handlers,
NULL,
};
// used to include a vehicle desc in another desc.
extern const byte _common_veh_desc[];
static const byte * const _desc_includes[] = {
_common_veh_desc
};
/* We can't save pointers to a savegame, so this functions get's
the index of the item, and if not available, it hussles with
pointers (looks really bad :()
Remember that a NULL item has value 0, and all
indexes have + 1, so vehicle 0 is saved as index 1. */
static uint ReferenceToInt(void *v, uint t)
{
if (v == NULL)
return 0;
switch (t) {
case REF_VEHICLE_OLD: // Old vehicles we save as new onces
case REF_VEHICLE: return ((Vehicle *)v)->index + 1;
case REF_STATION: return ((Station *)v)->index + 1;
case REF_TOWN: return ((Town *)v)->index + 1;
case REF_ORDER: return ((Order *)v)->index + 1;
default:
NOT_REACHED();
}
return 0;
}
static void *IntToReference(uint r, uint t)
{
/* From version 4.3 REF_VEHICLE_OLD is saved as REF_VEHICLE, and should be loaded
like that */
if (t == REF_VEHICLE_OLD &&
_sl.full_version >= 0x404)
t = REF_VEHICLE;
if (t != REF_VEHICLE_OLD && r == 0)
return NULL;
switch (t) {
case REF_ORDER: return GetOrder(r - 1);
case REF_VEHICLE: return GetVehicle(r - 1);
case REF_STATION: return GetStation(r - 1);
case REF_TOWN: return GetTown(r - 1);
case REF_VEHICLE_OLD: {
/* Old vehicles were saved differently: invalid vehicle was 0xFFFF,
and the index was not - 1.. correct for this */
if (r == INVALID_VEHICLE)
return NULL;
return GetVehicle(r);
}
default:
NOT_REACHED();
}
return NULL;
}
typedef struct {
const char *name;
uint32 tag;
bool (*init_read)(void);
ReaderProc *reader;
void (*uninit_read)(void);
bool (*init_write)(void);
WriterProc *writer;
void (*uninit_write)(void);
} SaveLoadFormat;
static const SaveLoadFormat _saveload_formats[] = {
{"lzo", TO_BE32X('OTTD'), InitLZO,ReadLZO, UninitLZO, InitLZO, WriteLZO, UninitLZO},
{"none", TO_BE32X('OTTN'), InitNoComp,ReadNoComp, UninitNoComp, InitNoComp, WriteNoComp, UninitNoComp},
#if defined(WITH_ZLIB)
{"zlib", TO_BE32X('OTTZ'), InitReadZlib,ReadZlib, UninitReadZlib, InitWriteZlib, WriteZlib, UninitWriteZlib},
#else
{"zlib", TO_BE32X('OTTZ'), NULL,NULL,NULL,NULL,NULL,NULL}
#endif
};
static const SaveLoadFormat *GetSavegameFormat(const char *s)
{
const SaveLoadFormat *def;
int i;
// find default savegame format
def = endof(_saveload_formats) - 1;
while (!def->init_write) def--;
if (_savegame_format[0]) {
for(i = 0; i!=lengthof(_saveload_formats); i++)
if (_saveload_formats[i].init_write && !strcmp(s, _saveload_formats[i].name))
return _saveload_formats + i;
ShowInfoF("Savegame format '%s' is not available. Reverting to '%s'.", s, def->name);
}
return def;
}
// actual loader/saver function
extern void InitializeGame(void);
extern bool AfterLoadGame(uint version);
extern void BeforeSaveGame(void);
extern bool LoadOldSaveGame(const char *file);
// Save or Load files SL_LOAD, SL_SAVE, SL_OLD_LOAD
int SaveOrLoad(const char *filename, int mode)
{
uint32 hdr[2];
const SaveLoadFormat *fmt;
uint version;
// old style load
if (mode == SL_OLD_LOAD) {
InitializeGame();
if (!LoadOldSaveGame(filename)) return SL_REINIT;
AfterLoadGame(0);
return SL_OK;
}
_sl.fh = fopen(filename, mode?"wb":"rb");
if (_sl.fh == NULL)
return SL_ERROR;
_sl.bufe = _sl.bufp = NULL;
_sl.offs_base = 0;
_sl.int_to_ref_proc = IntToReference;
_sl.ref_to_int_proc = ReferenceToInt;
_sl.save = mode;
_sl.includes = _desc_includes;
_sl.chs = _chunk_handlers;
// setup setjmp error handler
if (setjmp(_sl.excpt)) {
// close file handle.
fclose(_sl.fh); _sl.fh = NULL;
// deinitialize compressor.
_sl.excpt_uninit();
// a saver/loader exception!!
// reinitialize all variables to prevent crash!
if (mode == SL_LOAD) {
ShowInfoF("Load game failed: %s.", _sl.excpt_msg);
return SL_REINIT;
} else {
ShowInfoF("Save game failed: %s.", _sl.excpt_msg);
return SL_ERROR;
}
}
// we first initialize here to avoid: "warning: variable `version' might
// be clobbered by `longjmp' or `vfork'"
version = 0;
if (mode != SL_LOAD) {
fmt = GetSavegameFormat(_savegame_format);
_sl.write_bytes = fmt->writer;
_sl.excpt_uninit = fmt->uninit_write;
if (!fmt->init_write()) goto init_err;
hdr[0] = fmt->tag;
hdr[1] = TO_BE32((SAVEGAME_MAJOR_VERSION << 16) + (SAVEGAME_MINOR_VERSION << 8));
if (fwrite(hdr, sizeof(hdr), 1, _sl.fh) != 1) SlError("file write failed");
_sl.version = SAVEGAME_MAJOR_VERSION;
BeforeSaveGame();
SlSaveChunks();
SlWriteFill(); // flush the save buffer
fmt->uninit_write();
} else {
if (fread(hdr, sizeof(hdr), 1, _sl.fh) != 1) {
read_err:
printf("Savegame is obsolete or invalid format.\n");
init_err:
fclose(_sl.fh);
return SL_ERROR;
}
// see if we have any loader for this type.
for(fmt = _saveload_formats; ; fmt++) {
if (fmt == endof(_saveload_formats)) {
printf("Unknown savegame type, trying to load it as the buggy format.\n");
rewind(_sl.fh);
_sl.version = 0;
_sl.full_version = 0;
version = 0;
fmt = _saveload_formats + 0; // lzo
break;
}
if (fmt->tag == hdr[0]) {
// check version number
version = TO_BE32(hdr[1]) >> 8;
/* Is the version higher than the current? */
if (version > SAVEGAME_LOADABLE_VERSION)
goto read_err;
_sl.version = (version >> 8);
_sl.full_version = version;
break;
}
}
_sl.read_bytes = fmt->reader;
_sl.excpt_uninit = fmt->uninit_read;
// loader for this savegame type is not implemented?
if (fmt->init_read == NULL) {
ShowInfoF("Loader for '%s' is not available.", fmt->name);
fclose(_sl.fh);
return SL_ERROR;
}
if (!fmt->init_read()) goto init_err;
// Clear everything
InitializeGame();
SlLoadChunks();
fmt->uninit_read();
}
fclose(_sl.fh);
if (mode == SL_LOAD) {
if (!AfterLoadGame(version))
return SL_REINIT;
}
return SL_OK;
}
#ifdef WIN32
bool EmergencySave(void)
{
SaveOrLoad("crash.sav", SL_SAVE);
return true;
}
#endif
void DoExitSave(void)
{
char buf[200];
sprintf(buf, "%s%sexit.sav", _path.autosave_dir, PATHSEP);
SaveOrLoad(buf, SL_SAVE);
}
// not used right now, but could be used if extensions of savegames are garbled
/*int GetSavegameType(char *file)
{
const SaveLoadFormat *fmt;
uint32 hdr;
FILE *f;
int mode = SL_OLD_LOAD;
f = fopen(file, "rb");
if (fread(&hdr, sizeof(hdr), 1, f) != 1) {
printf("Savegame is obsolete or invalid format.\n");
mode = SL_LOAD; // don't try to get filename, just show name as it is written
}
else {
// see if we have any loader for this type.
for (fmt = _saveload_formats; fmt != endof(_saveload_formats); fmt++) {
if (fmt->tag == hdr) {
mode = SL_LOAD; // new type of savegame
break;
}
}
}
fclose(f);
return mode;
}*/