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bbc145cbee
Seems to work but there's not that much material to use it on so the mileage may vary.
200 lines
5.1 KiB
C++
200 lines
5.1 KiB
C++
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#ifndef __RESFILE_H
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#define __RESFILE_H
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#include <stdint.h>
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#include "files.h"
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#include "zstring.h"
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#include "name.h"
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class FResourceFile;
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class FTexture;
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enum ELumpFlags
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{
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LUMPF_ZIPFILE=1, // contains a full path
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LUMPF_BLOODCRYPT = 2, // encrypted
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LUMPF_COMPRESSED = 4, // compressed
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LUMPF_SEQUENTIAL = 8, // compressed but a sequential reader can be retrieved.
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};
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class FResourceFile;
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// This holds a compresed Zip entry with all needed info to decompress it.
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struct FCompressedBuffer
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{
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unsigned mSize;
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unsigned mCompressedSize;
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int mMethod;
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int mZipFlags;
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unsigned mCRC32;
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char *mBuffer;
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bool Decompress(char *destbuffer);
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void Clean()
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{
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mSize = mCompressedSize = 0;
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if (mBuffer != nullptr)
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{
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delete[] mBuffer;
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mBuffer = nullptr;
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}
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}
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};
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struct FResourceLump
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{
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enum ENameType
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{
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FullNameType,
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FullNameNoExtType,
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BaseNameType,
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BaseNameNoExtType,
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ExtensionType,
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NUMNAMETYPES
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};
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friend class FResourceFile;
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friend struct FClonedLump;
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unsigned LumpSize = 0;
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int RefCount = 0;
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int Flags = 0;
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int ResourceId = -1;
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FName LumpName[NUMNAMETYPES] = {};
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FResourceFile * Owner = nullptr;
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TArray<uint8_t> Cache;
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FResourceLump() = default;
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virtual ~FResourceLump();
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virtual FileReader *GetReader();
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virtual FileReader NewReader();
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virtual int GetFileOffset() { return -1; }
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void LumpNameSetup(FString iname);
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virtual FCompressedBuffer GetRawData();
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virtual void *Lock(); // validates the cache and increases the refcount.
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virtual void Unlock(bool freeunrefd = false); // recreases the refcount and optionally frees the buffer
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virtual void *Get(); // validates the cache and returns a pointer without locking
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// Wrappers for emulating Blood's resource system
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unsigned Size() const{ return LumpSize; }
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int LockCount() const { return RefCount; }
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const char *ResName() const { return LumpName[BaseNameNoExtType]; }
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const FName ResType() { return LumpName[ExtensionType]; }
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const char *FullName() const { return LumpName[FullNameType]; }
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protected:
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virtual int ValidateCache() { return -1; }
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};
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// Map NBlood's resource system to our own.
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using DICTNODE = FResourceLump;
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class FResourceFile
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{
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public:
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FileReader Reader;
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FString FileName;
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protected:
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uint32_t NumLumps;
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FResourceFile(const char *filename);
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FResourceFile(const char *filename, FileReader &r);
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// for archives that can contain directories
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void PostProcessArchive(void *lumps, size_t lumpsize);
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private:
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uint32_t FirstLump;
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int FilterLumps(FString filtername, void *lumps, size_t lumpsize, uint32_t max);
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bool FindPrefixRange(FString filter, void *lumps, size_t lumpsize, uint32_t max, uint32_t &start, uint32_t &end);
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void JunkLeftoverFilters(void *lumps, size_t lumpsize, uint32_t max);
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static FResourceFile *DoOpenResourceFile(const char *filename, FileReader &file, bool quiet, bool containeronly);
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public:
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static FResourceFile *OpenResourceFile(const char *filename, FileReader &file, bool quiet = false, bool containeronly = false);
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static FResourceFile *OpenResourceFile(const char *filename, bool quiet = false, bool containeronly = false);
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static FResourceFile* OpenDirectory(const char* filename, bool quiet = false, bool nosubdirs = false);
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virtual ~FResourceFile();
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// If this FResourceFile represents a directory, the Reader object is not usable so don't return it.
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FileReader *GetReader() { return Reader.isOpen()? &Reader : nullptr; }
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uint32_t LumpCount() const { return NumLumps; }
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uint32_t GetFirstLump() const { return FirstLump; }
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void SetFirstLump(uint32_t f) { FirstLump = f; }
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virtual bool Open(bool quiet) = 0;
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virtual FResourceLump *GetLump(int no) = 0;
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FResourceLump *FindLump(const char *name);
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};
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struct FUncompressedLump : public FResourceLump
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{
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int Position;
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FileReader *GetReader() override;
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int ValidateCache() override;
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virtual int GetFileOffset() override { return Position; }
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};
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// Base class for uncompressed resource files (GRP, PAK and single lumps)
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class FUncompressedFile : public FResourceFile
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{
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protected:
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TArray<FUncompressedLump> Lumps;
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FUncompressedFile(const char *filename);
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FUncompressedFile(const char *filename, FileReader &r);
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virtual FResourceLump *GetLump(int no) { return ((unsigned)no < NumLumps)? &Lumps[no] : NULL; }
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};
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struct FExternalLump : public FResourceLump
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{
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FString Filename;
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FExternalLump(const char *_filename, int filesize = -1);
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virtual int ValidateCache() override;
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};
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struct FMemoryLump : public FResourceLump
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{
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FMemoryLump(const void* data, int length)
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{
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LumpSize = length;
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Cache.Resize(length);
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memcpy(Cache.Data(), data, length);
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}
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virtual int ValidateCache() override
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{
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RefCount = INT_MAX / 2; // Make sure it never counts down to 0 by resetting it to something high each time it is used.
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return 1;
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}
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};
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struct FClonedLump : public FResourceLump
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{
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FResourceLump* parent;
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FClonedLump(FResourceLump* lump)
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{
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parent = lump;
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}
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void* Lock() override { return parent->Lock(); }
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void Unlock(bool mayfree) override { parent->Unlock(mayfree); }
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void* Get() override { return parent->Get(); }
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int ValidateCache() override { return parent->ValidateCache(); }
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};
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#endif
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