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225 lines
8 KiB
C++
225 lines
8 KiB
C++
#pragma once
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//-----------------------------------------------------------------------------
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//
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// DESCRIPTION:
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// File system I/O functions.
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//
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//-----------------------------------------------------------------------------
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#include "files.h"
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#include "tarray.h"
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#include "cmdlib.h"
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#include "zstring.h"
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#include "resourcefile.h"
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class FResourceFile;
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struct FResourceLump;
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class FGameTexture;
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union LumpShortName
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{
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char String[9];
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uint32_t dword; // These are for accessing the first 4 or 8 chars of
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uint64_t qword; // Name as a unit without breaking strict aliasing rules
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};
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// A lump in memory.
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class FileData
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{
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public:
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FileData ();
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FileData (const FileData ©);
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FileData &operator= (const FileData ©);
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~FileData ();
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void *GetMem () { return Block.Len() == 0 ? NULL : (void *)Block.GetChars(); }
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size_t GetSize () { return Block.Len(); }
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const FString &GetString () const { return Block; }
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private:
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FileData (const FString &source);
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FString Block;
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friend class FileSystem;
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};
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struct FolderEntry
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{
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const char *name;
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unsigned lumpnum;
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};
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class FileSystem
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{
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public:
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FileSystem ();
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~FileSystem ();
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// The wadnum for the IWAD
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int GetIwadNum() { return IwadIndex; }
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void SetIwadNum(int x) { IwadIndex = x; }
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int GetMaxIwadNum() { return MaxIwadIndex; }
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void SetMaxIwadNum(int x) { MaxIwadIndex = x; }
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void InitSingleFile(const char *filename, bool quiet = false);
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void InitMultipleFiles (TArray<FString> &filenames, bool quiet = false, LumpFilterInfo* filter = nullptr);
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void AddFile (const char *filename, FileReader *wadinfo, bool quiet, LumpFilterInfo* filter);
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int CheckIfResourceFileLoaded (const char *name) noexcept;
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void AddAdditionalFile(const char* filename, FileReader* wadinfo = NULL) {}
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const char *GetResourceFileName (int filenum) const noexcept;
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const char *GetResourceFileFullName (int wadnum) const noexcept;
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int GetFirstEntry(int wadnum) const noexcept;
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int GetLastEntry(int wadnum) const noexcept;
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int GetEntryCount(int wadnum) const noexcept;
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int CheckNumForName (const char *name, int namespc);
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int CheckNumForName (const char *name, int namespc, int wadfile, bool exact = true);
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int GetNumForName (const char *name, int namespc);
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inline int CheckNumForName (const uint8_t *name) { return CheckNumForName ((const char *)name, ns_global); }
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inline int CheckNumForName (const char *name) { return CheckNumForName (name, ns_global); }
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inline int CheckNumForName (const FString &name) { return CheckNumForName (name.GetChars()); }
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inline int CheckNumForName (const uint8_t *name, int ns) { return CheckNumForName ((const char *)name, ns); }
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inline int GetNumForName (const char *name) { return GetNumForName (name, ns_global); }
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inline int GetNumForName (const FString &name) { return GetNumForName (name.GetChars(), ns_global); }
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inline int GetNumForName (const uint8_t *name) { return GetNumForName ((const char *)name); }
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inline int GetNumForName (const uint8_t *name, int ns) { return GetNumForName ((const char *)name, ns); }
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int CheckNumForFullName (const char *name, bool trynormal = false, int namespc = ns_global, bool ignoreext = false);
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int CheckNumForFullName (const char *name, int wadfile);
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int GetNumForFullName (const char *name);
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int FindFile(const char* name)
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{
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return CheckNumForFullName(name);
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}
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bool FileExists(const char* name)
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{
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return FindFile(name) >= 0;
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}
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bool FileExists(const FString& name)
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{
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return FindFile(name) >= 0;
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}
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bool FileExists(const std::string& name)
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{
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return FindFile(name.c_str()) >= 0;
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}
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LumpShortName& GetShortName(int i); // may only be called before the hash chains are set up.
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void RenameFile(int num, const char* fn);
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bool CreatePathlessCopy(const char* name, int id, int flags);
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inline int CheckNumForFullName(const FString &name, bool trynormal = false, int namespc = ns_global) { return CheckNumForFullName(name.GetChars(), trynormal, namespc); }
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inline int CheckNumForFullName (const FString &name, int wadfile) { return CheckNumForFullName(name.GetChars(), wadfile); }
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inline int GetNumForFullName (const FString &name) { return GetNumForFullName(name.GetChars()); }
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void SetLinkedTexture(int lump, FGameTexture *tex);
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FGameTexture *GetLinkedTexture(int lump);
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void ReadFile (int lump, void *dest);
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TArray<uint8_t> GetFileData(int lump, int pad = 0); // reads lump into a writable buffer and optionally adds some padding at the end. (FileData isn't writable!)
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FileData ReadFile (int lump);
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FileData ReadFile (const char *name) { return ReadFile (GetNumForName (name)); }
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inline TArray<uint8_t> LoadFile(const char* name, int padding = 0)
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{
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auto lump = FindFile(name);
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if (lump < 0) return TArray<uint8_t>();
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return GetFileData(lump, padding);
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}
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FileReader OpenFileReader(int lump); // opens a reader that redirects to the containing file's one.
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FileReader ReopenFileReader(int lump, bool alwayscache = false); // opens an independent reader.
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FileReader OpenFileReader(const char* name);
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int FindLump (const char *name, int *lastlump, bool anyns=false); // [RH] Find lumps with duplication
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int FindLumpMulti (const char **names, int *lastlump, bool anyns = false, int *nameindex = NULL); // same with multiple possible names
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int FindLumpFullName(const char* name, int* lastlump, bool noext = false);
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bool CheckFileName (int lump, const char *name); // [RH] True if lump's name == name
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int FindFileWithExtensions(const char* name, const char* const* exts, int count);
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int FindResource(int resid, const char* type, int filenum = -1) const noexcept;
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int GetResource(int resid, const char* type, int filenum = -1) const;
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static uint32_t LumpNameHash (const char *name); // [RH] Create hash key from an 8-char name
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int FileLength (int lump) const;
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int GetFileOffset (int lump); // [RH] Returns offset of lump in the wadfile
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int GetFileFlags (int lump); // Return the flags for this lump
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void GetFileShortName (char *to, int lump) const; // [RH] Copies the lump name to to using uppercopy
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void GetFileShortName (FString &to, int lump) const;
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const char* GetFileShortName(int lump) const;
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const char *GetFileFullName (int lump, bool returnshort = true) const; // [RH] Returns the lump's full name
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FString GetFileFullPath (int lump) const; // [RH] Returns wad's name + lump's full name
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int GetFileContainer (int lump) const; // [RH] Returns wadnum for a specified lump
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int GetFileNamespace (int lump) const; // [RH] Returns the namespace a lump belongs to
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void SetFileNamespace(int lump, int ns);
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int GetResourceId(int lump) const; // Returns the RFF index number for this lump
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const char* GetResourceType(int lump) const;
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bool CheckFileName (int lump, const char *name) const; // [RH] Returns true if the names match
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unsigned GetFilesInFolder(const char *path, TArray<FolderEntry> &result, bool atomic) const;
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int GetNumEntries() const
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{
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return NumEntries;
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}
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int GetNumWads() const
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{
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return Files.Size();
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}
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void AddLump(FResourceLump* lump);
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int AddExternalFile(const char *filename);
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int AddFromBuffer(const char* name, const char* type, char* data, int size, int id, int flags);
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FileReader* GetFileReader(int wadnum); // Gets a FileReader object to the entire WAD
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void InitHashChains();
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FResourceLump* GetFileAt(int no);
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protected:
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struct LumpRecord;
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TArray<FResourceFile *> Files;
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TArray<LumpRecord> FileInfo;
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TArray<uint32_t> Hashes; // one allocation for all hash lists.
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uint32_t *FirstLumpIndex; // [RH] Hashing stuff moved out of lumpinfo structure
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uint32_t *NextLumpIndex;
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uint32_t *FirstLumpIndex_FullName; // The same information for fully qualified paths from .zips
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uint32_t *NextLumpIndex_FullName;
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uint32_t *FirstLumpIndex_NoExt; // The same information for fully qualified paths from .zips
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uint32_t *NextLumpIndex_NoExt;
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uint32_t* FirstLumpIndex_ResId; // The same information for fully qualified paths from .zips
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uint32_t* NextLumpIndex_ResId;
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uint32_t NumEntries = 0; // Not necessarily the same as FileInfo.Size()
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uint32_t NumWads;
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int IwadIndex = -1;
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int MaxIwadIndex = -1;
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private:
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void DeleteAll();
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void MoveLumpsInFolder(const char *);
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};
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extern FileSystem fileSystem;
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