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Merge branch 'extra_large_maps-sx' into jgrpp

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Conflicts:
	src/saveload/saveload.cpp
This commit is contained in:
Jonathan G Rennison
2015-09-11 22:50:35 +01:00
parent 5a8049f65b 1891e7dfc8
commit 8b994e255d
11 changed files with 189 additions and 23 deletions
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64
src/saveload/saveload.cpp
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@@ -894,9 +894,20 @@ void SlSetLength(size_t length)
case CH_RIFF:
/* Ugly encoding of >16M RIFF chunks
* The lower 24 bits are normal
* The uppermost 4 bits are bits 24:27 */
assert(length < (1 << 28));
* The uppermost 4 bits are bits 24:27
*
* If we have more than 28 bits, use an extra uint32 and
* signal this using the extended chunk header */
assert(length < (1LL << 32));
if (length >= (1 << 28)) {
/* write out extended chunk header */
SlWriteByte(CH_EXT_HDR);
SlWriteUint32(static_cast<uint32>(SLCEHF_BIG_RIFF));
}
SlWriteUint32((uint32)((length & 0xFFFFFF) | ((length >> 24) << 28)));
if (length >= (1 << 28)) {
SlWriteUint32(length >> 28);
}
break;
case CH_ARRAY:
assert(_sl.last_array_index <= _sl.array_index);
@@ -1667,6 +1678,16 @@ void SlAutolength(AutolengthProc *proc, void *arg)
if (offs != _sl.dumper->GetSize()) SlErrorCorrupt("Invalid chunk size");
}
/*
* Notes on extended chunk header:
*
* If the chunk type is CH_EXT_HDR (15), then a u32 flags field follows.
* This flag field may define additional fields which follow the flags field in future.
* The standard chunk header follows, though it my be modified by the flags field.
* At present SLCEHF_BIG_RIFF increases the RIFF size limit to a theoretical 60 bits,
* by adding a further u32 field for the high bits after the existing RIFF size field.
*/
/**
* Load a chunk of data (eg vehicles, stations, etc.)
* @param ch The chunkhandler that will be used for the operation
@@ -1680,6 +1701,15 @@ static void SlLoadChunk(const ChunkHandler *ch)
_sl.block_mode = m;
_sl.obj_len = 0;
SaveLoadChunkExtHeaderFlags ext_flags = static_cast<SaveLoadChunkExtHeaderFlags>(0);
if ((m & 0xF) == CH_EXT_HDR) {
ext_flags = static_cast<SaveLoadChunkExtHeaderFlags>(SlReadUint32());
/* read in real header */
m = SlReadByte();
_sl.block_mode = m;
}
switch (m) {
case CH_ARRAY:
_sl.array_index = 0;
@@ -1701,6 +1731,10 @@ static void SlLoadChunk(const ChunkHandler *ch)
}
len = SlReadUint32();
}
if (ext_flags & SLCEHF_BIG_RIFF) {
len |= SlReadUint32() << 28;
}
_sl.obj_len = len;
endoffs = _sl.reader->GetSize() + len;
ch->load_proc();
@@ -1726,9 +1760,21 @@ static void SlLoadCheckChunk(const ChunkHandler *ch)
_sl.block_mode = m;
_sl.obj_len = 0;
SaveLoadChunkExtHeaderFlags ext_flags = static_cast<SaveLoadChunkExtHeaderFlags>(0);
if ((m & 0xF) == CH_EXT_HDR) {
ext_flags = static_cast<SaveLoadChunkExtHeaderFlags>(SlReadUint32());
/* read in real header */
m = SlReadByte();
_sl.block_mode = m;
}
switch (m) {
case CH_ARRAY:
_sl.array_index = 0;
if (ext_flags) {
SlErrorCorruptFmt("CH_ARRAY does not take chunk header extension flags: 0x%X", ext_flags);
}
if (ch && ch->load_check_proc) {
ch->load_check_proc();
} else {
@@ -1736,6 +1782,9 @@ static void SlLoadCheckChunk(const ChunkHandler *ch)
}
break;
case CH_SPARSE_ARRAY:
if (ext_flags) {
SlErrorCorruptFmt("CH_SPARSE_ARRAY does not take chunk header extension flags: 0x%X", ext_flags);
}
if (ch && ch->load_check_proc) {
ch->load_check_proc();
} else {
@@ -1744,6 +1793,9 @@ static void SlLoadCheckChunk(const ChunkHandler *ch)
break;
default:
if ((m & 0xF) == CH_RIFF) {
if (ext_flags != (ext_flags & SLCEHF_BIG_RIFF)) {
SlErrorCorruptFmt("Unknown chunk header extension flags for CH_RIFF: 0x%X", ext_flags);
}
/* Read length */
len = (SlReadByte() << 16) | ((m >> 4) << 24);
len += SlReadUint16();
@@ -1752,6 +1804,14 @@ static void SlLoadCheckChunk(const ChunkHandler *ch)
SlErrorCorrupt("RIFF chunk too large");
}
len = SlReadUint32();
if (ext_flags & SLCEHF_BIG_RIFF) SlErrorCorrupt("XSLFI_RIFF_HEADER_60_BIT and SLCEHF_BIG_RIFF both present");
}
if (ext_flags & SLCEHF_BIG_RIFF) {
uint64 full_len = len | (static_cast<uint64>(SlReadUint32()) << 28);
if (full_len >= (1LL << 32)) {
SlErrorCorrupt("Chunk size too large: " OTTD_PRINTFHEX64, full_len);
}
len = static_cast<size_t>(full_len);
}
_sl.obj_len = len;
endoffs = _sl.reader->GetSize() + len;