/**
* Get the data section size of a GRF.
* @param f GRF.
* @return Size of the data section or SIZE_MAX if the file has no separate data section.
*/
size_t GRFGetSizeOfDataSection(FILE *f)
{
extern const byte _grf_cont_v2_sig[];
static const uint header_len = 14;
byte data[header_len];
if (fread(data, 1, header_len, f) == header_len) {
if (data[0] == 0 && data[1] == 0 && MemCmpT(data + 2, _grf_cont_v2_sig, 8) == 0) {
/* Valid container version 2, get data section size. */
size_t offset = (data[13] << 24) | (data[12] << 16) | (data[11] << 8) | data[10];
return header_len + offset;
}
}
return SIZE_MAX;
}
/**
* Read the header of a standard MIDI file.
* The function will consume 14 bytes from the current file pointer position.
* @param[in] file open file to read from (should be in binary mode)
* @param[out] header filled with data read
* @return true if a header in correct format could be read from the file
*/
bool MidiFile::ReadSMFHeader(FILE *file, SMFHeader &header)
{
/* Try to read header, fixed size */
byte buffer[14];
if (fread(buffer, sizeof(buffer), 1, file) != 1) {
return false;
}
/* Check magic, 'MThd' followed by 4 byte length indicator (always = 6 in SMF) */
const byte magic[] = { 'M', 'T', 'h', 'd', 0x00, 0x00, 0x00, 0x06 };
if (MemCmpT(buffer, magic, sizeof(magic)) != 0) {
return false;
}
/* Read the parameters of the file */
header.format = (buffer[8] << 8) | buffer[9];
header.tracks = (buffer[10] << 8) | buffer[11];
header.tickdiv = (buffer[12] << 8) | buffer[13];
return true;
}
/**
* Get the data section size of a GRF.
* @param f GRF.
* @return Size of the data section or SIZE_MAX if the file has no separate data section.
*/
size_t GRFGetSizeOfDataSection(FILE *f)
{
extern const byte _grf_cont_v2_sig[];
static const uint header_len = 14;
byte data[header_len];
if (fread(data, 1, header_len, f) == header_len) {
if (data[0] == 0 && data[1] == 0 && MemCmpT(data + 2, _grf_cont_v2_sig, 8) == 0) {
/* Valid container version 2, get data section size. */
size_t offset = ((size_t)data[13] << 24) | ((size_t)data[12] << 16) | ((size_t)data[11] << 8) | (size_t)data[10];
if (offset >= 1 * 1024 * 1024 * 1024) {
DEBUG(grf, 0, "Unexpectedly large offset for NewGRF");
/* Having more than 1 GiB of data is very implausible. Mostly because then
* all pools in OpenTTD are flooded already. Or it's just Action C all over.
* In any case, the offsets to graphics will likely not work either. */
return SIZE_MAX;
}
return header_len + offset;
}
}
return SIZE_MAX;
}
/**
* Check the validity of some of the caches.
* Especially in the sense of desyncs between
* the cached value and what the value would
* be when calculated from the 'base' data.
*/
static void CheckCaches()
{
/* Return here so it is easy to add checks that are run
* always to aid testing of caches. */
if (_debug_desync_level <= 1) return;
/* Check the town caches. */
SmallVector<TownCache, 4> old_town_caches;
Town *t;
FOR_ALL_TOWNS(t) {
MemCpyT(old_town_caches.Append(), &t->cache);
}
extern void RebuildTownCaches();
RebuildTownCaches();
RebuildSubsidisedSourceAndDestinationCache();
uint i = 0;
FOR_ALL_TOWNS(t) {
if (MemCmpT(old_town_caches.Get(i), &t->cache) != 0) {
DEBUG(desync, 2, "town cache mismatch: town %i", (int)t->index);
}
i++;
}
/* Check company infrastructure cache. */
SmallVector<CompanyInfrastructure, 4> old_infrastructure;
Company *c;
FOR_ALL_COMPANIES(c) MemCpyT(old_infrastructure.Append(), &c->infrastructure);
extern void AfterLoadCompanyStats();
AfterLoadCompanyStats();
i = 0;
FOR_ALL_COMPANIES(c) {
if (MemCmpT(old_infrastructure.Get(i), &c->infrastructure) != 0) {
DEBUG(desync, 2, "infrastructure cache mismatch: company %i", (int)c->index);
}
i++;
}
/* Strict checking of the road stop cache entries */
const RoadStop *rs;
FOR_ALL_ROADSTOPS(rs) {
if (IsStandardRoadStopTile(rs->xy)) continue;
assert(rs->GetEntry(DIAGDIR_NE) != rs->GetEntry(DIAGDIR_NW));
rs->GetEntry(DIAGDIR_NE)->CheckIntegrity(rs);
rs->GetEntry(DIAGDIR_NW)->CheckIntegrity(rs);
}
Vehicle *v;
FOR_ALL_VEHICLES(v) {
extern void FillNewGRFVehicleCache(const Vehicle *v);
if (v != v->First() || v->vehstatus & VS_CRASHED || !v->IsPrimaryVehicle()) continue;
uint length = 0;
for (const Vehicle *u = v; u != NULL; u = u->Next()) length++;
NewGRFCache *grf_cache = CallocT<NewGRFCache>(length);
VehicleCache *veh_cache = CallocT<VehicleCache>(length);
GroundVehicleCache *gro_cache = CallocT<GroundVehicleCache>(length);
TrainCache *tra_cache = CallocT<TrainCache>(length);
length = 0;
for (const Vehicle *u = v; u != NULL; u = u->Next()) {
FillNewGRFVehicleCache(u);
grf_cache[length] = u->grf_cache;
veh_cache[length] = u->vcache;
switch (u->type) {
case VEH_TRAIN:
gro_cache[length] = Train::From(u)->gcache;
tra_cache[length] = Train::From(u)->tcache;
break;
case VEH_ROAD:
gro_cache[length] = RoadVehicle::From(u)->gcache;
break;
default:
break;
}
length++;
}
switch (v->type) {
case VEH_TRAIN: Train::From(v)->ConsistChanged(CCF_TRACK); break;
case VEH_ROAD: RoadVehUpdateCache(RoadVehicle::From(v)); break;
case VEH_AIRCRAFT: UpdateAircraftCache(Aircraft::From(v)); break;
case VEH_SHIP: Ship::From(v)->UpdateCache(); break;
default: break;
}
length = 0;
for (const Vehicle *u = v; u != NULL; u = u->Next()) {
FillNewGRFVehicleCache(u);
if (memcmp(&grf_cache[length], &u->grf_cache, sizeof(NewGRFCache)) != 0) {
DEBUG(desync, 2, "newgrf cache mismatch: type %i, vehicle %i, company %i, unit number %i, wagon %i", (int)v->type, v->index, (int)v->owner, v->unitnumber, length);
}
if (memcmp(&veh_cache[length], &u->vcache, sizeof(VehicleCache)) != 0) {
DEBUG(desync, 2, "vehicle cache mismatch: type %i, vehicle %i, company %i, unit number %i, wagon %i", (int)v->type, v->index, (int)v->owner, v->unitnumber, length);
}
switch (u->type) {
case VEH_TRAIN:
if (memcmp(&gro_cache[length], &Train::From(u)->gcache, sizeof(GroundVehicleCache)) != 0) {
DEBUG(desync, 2, "train ground vehicle cache mismatch: vehicle %i, company %i, unit number %i, wagon %i", v->index, (int)v->owner, v->unitnumber, length);
}
if (memcmp(&tra_cache[length], &Train::From(u)->tcache, sizeof(TrainCache)) != 0) {
DEBUG(desync, 2, "train cache mismatch: vehicle %i, company %i, unit number %i, wagon %i", v->index, (int)v->owner, v->unitnumber, length);
}
break;
case VEH_ROAD:
if (memcmp(&gro_cache[length], &RoadVehicle::From(u)->gcache, sizeof(GroundVehicleCache)) != 0) {
DEBUG(desync, 2, "road vehicle ground vehicle cache mismatch: vehicle %i, company %i, unit number %i, wagon %i", v->index, (int)v->owner, v->unitnumber, length);
}
break;
default:
break;
}
length++;
}
free(grf_cache);
free(veh_cache);
free(gro_cache);
free(tra_cache);
}
/* Check whether the caches are still valid */
FOR_ALL_VEHICLES(v) {
byte buff[sizeof(VehicleCargoList)];
memcpy(buff, &v->cargo, sizeof(VehicleCargoList));
v->cargo.InvalidateCache();
assert(memcmp(&v->cargo, buff, sizeof(VehicleCargoList)) == 0);
}
Station *st;
FOR_ALL_STATIONS(st) {
for (CargoID c = 0; c < NUM_CARGO; c++) {
byte buff[sizeof(StationCargoList)];
memcpy(buff, &st->goods[c].cargo, sizeof(StationCargoList));
st->goods[c].cargo.InvalidateCache();
assert(memcmp(&st->goods[c].cargo, buff, sizeof(StationCargoList)) == 0);
}
}
}
