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fixed OpenDecompressor flag handling.

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This commit is contained in:
Christoph Oelckers 2023-12-13 16:57:49 +01:00
parent e1cf8af9d3
commit 292705ddc3
4 changed files with 23 additions and 13 deletions
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11
src/common/filesystem/include/fs_files.h
View file

@ -73,7 +73,7 @@ public:
};
// Zip compression methods, extended by some internal types to be passed to OpenDecompressor
enum
enum ECompressionMethod
{
METHOD_STORED = 0,
METHOD_SHRINK = 1,
@ -96,6 +96,13 @@ enum
METHOD_TRANSFEROWNER = 0x8000,
};
enum EDecompressFlags
{
DCF_TRANSFEROWNER = 1,
DCF_SEEKABLE = 2,
DCF_EXCEPTIONS = 4
};
class FileReader;
// an opaque memory buffer to the file's content. Can either own the memory or just point to an external buffer.
@ -283,7 +290,7 @@ public:
bool OpenMemoryArray(std::vector<uint8_t>& data); // take the given array
bool OpenMemoryArray(FileData& data); // take the given array
bool OpenMemoryArray(std::function<bool(std::vector<uint8_t>&)> getter); // read contents to a buffer and return a reader to it
bool OpenDecompressor(FileReader &parent, Size length, int method, bool seekable, bool exceptions = false); // creates a decompressor stream. 'seekable' uses a buffered version so that the Seek and Tell methods can be used.
bool OpenDecompressor(FileReader &parent, Size length, int method, int flags = 0); // creates a decompressor stream. 'seekable' uses a buffered version so that the Seek and Tell methods can be used.
Size Tell() const
{

19
src/common/filesystem/source/files_decompress.cpp
View file

@ -848,14 +848,16 @@ public:
};
bool FileReader::OpenDecompressor(FileReader &parent, Size length, int method, bool seekable, bool exceptions)
bool FileReader::OpenDecompressor(FileReader &parent, Size length, int method, int flags)
{
FileReaderInterface* fr = nullptr;
DecompressorBase* dec = nullptr;
try
{
FileReader* p = &parent;
switch (method & ~METHOD_TRANSFEROWNER)
bool exceptions = !!(flags & DCF_EXCEPTIONS);
switch (method)
{
case METHOD_DEFLATE:
case METHOD_ZLIB:
@ -975,13 +977,13 @@ bool FileReader::OpenDecompressor(FileReader &parent, Size length, int method, b
}
if (dec)
{
if (method & METHOD_TRANSFEROWNER)
if (flags & DCF_TRANSFEROWNER)
{
dec->SetOwnsReader();
}
dec->Length = length;
}
if (!seekable)
if (!(flags & DCF_SEEKABLE))
{
Close();
mReader = fr;
@ -1003,16 +1005,17 @@ bool FileReader::OpenDecompressor(FileReader &parent, Size length, int method, b
bool FCompressedBuffer::Decompress(char* destbuffer)
{
FileReader mr;
mr.OpenMemory(mBuffer, mCompressedSize);
if (mMethod == METHOD_STORED)
{
return mr.Read(destbuffer, mSize) != mSize;
memcpy(destbuffer, mBuffer, mSize);
return true;
}
else
{
FileReader mr;
mr.OpenMemory(mBuffer, mCompressedSize);
FileReader frz;
if (frz.OpenDecompressor(mr, mSize, mMethod, false, false))
if (frz.OpenDecompressor(mr, mSize, mMethod))
{
return frz.Read(destbuffer, mSize) != mSize;
}

2
src/common/filesystem/source/resourcefile.cpp
View file

@ -564,7 +564,7 @@ FileReader FResourceFile::GetEntryReader(uint32_t entry, bool newreader)
{
FileReader fri;
fri.OpenFilePart(Reader, Entries[entry].Position, Entries[entry].CompressedSize);
fr.OpenDecompressor(fri, Entries[entry].Length, Entries[entry].Method | METHOD_TRANSFEROWNER, true, true);
fr.OpenDecompressor(fri, Entries[entry].Length, Entries[entry].Method, FileSys::DCF_TRANSFEROWNER | FileSys::DCF_SEEKABLE | FileSys::DCF_EXCEPTIONS);
}
}
return fr;

4
src/maploader/maploader.cpp
View file

@ -738,7 +738,7 @@ bool MapLoader::LoadExtendedNodes (FileReader &dalump, uint32_t id)
if (compressed)
{
FileReader zip;
if (zip.OpenDecompressor(dalump, -1, FileSys::METHOD_ZLIB, false, true))
if (zip.OpenDecompressor(dalump, -1, FileSys::METHOD_ZLIB, FileSys::DCF_EXCEPTIONS))
{
LoadZNodes(zip, type);
return true;
@ -3344,7 +3344,7 @@ void MapLoader::LoadLightmap(MapData *map)
return;
FileReader fr;
if (!fr.OpenDecompressor(map->Reader(ML_LIGHTMAP), -1, FileSys::METHOD_ZLIB, false, false))
if (!fr.OpenDecompressor(map->Reader(ML_LIGHTMAP), -1, FileSys::METHOD_ZLIB))
return;