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// This file is part of par2cmdline (a PAR 2.0 compatible file verification and
// repair tool). See http://parchive.sourceforge.net for details of PAR 2.0.
//
// Copyright (c) 2003 Peter Brian Clements
// Copyright (c) 2019 Michael D. Nahas
//
// par2cmdline is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// par2cmdline is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifndef __DISKFILE_H__
#define __DISKFILE_H__
// MAX_LENGTH is the maximum read/write size. It can be OS-dependant.
// The "& ~7" is to make it 8-byte aligned.
// LengthType is the type required for the read/write by the OS.
#ifdef _WIN32
#define MAX_LENGTH (0xffffffffUL & ~7)
#define LengthType DWORD
#else // !_WIN32
#define MAX_LENGTH (0xffffffffUL & ~7)
#define LengthType size_t
#endif
#include <list>
using std::list;
#include <map>
using std::map;
#include <vector>
using std::vector;
#include <memory>
// A disk file can be any type of file that par2cmdline needs
// to read or write data from or to.
class DiskFile
{
public:
DiskFile(std::ostream &sout, std::ostream &serr);
~DiskFile(void);
// Ensures the specified path's parent directory exists
bool CreateParentDirectory(string pathname);
// Create a file and set its length
bool Create(string filename, u64 filesize);
// Write some data to the file
// maxlength should be the default value, except during testing.
bool Write(u64 offset, const void *buffer, size_t length,
LengthType maxlength = MAX_LENGTH);
// Open the file
bool Open(void);
bool Open(const string &filename);
bool Open(const string &filename, u64 filesize);
// Check to see if the file is open
#ifdef _WIN32
bool IsOpen(void) const {return hFile != INVALID_HANDLE_VALUE;}
#else
bool IsOpen(void) const {return file != 0;}
#endif
// Read some data from the file
// maxlength should be the default value, except during testing.
bool Read(u64 offset, void *buffer, size_t length,
LengthType maxlength = MAX_LENGTH);
// Close the file
void Close(void);
// Get the size of the file
u64 FileSize(void) const {return filesize;}
// Get the name of the file
string FileName(void) const {return filename;}
// Does the file exist
bool Exists(void) const {return exists;}
// Rename the file
bool Rename(void); // Pick a filename automatically
bool Rename(string filename);
// Delete the file
bool Delete(void);
public:
static string GetCanonicalPathname(string filename);
static void SplitFilename(string filename, string &path, string &name);
static void SplitRelativeFilename(string filename, string basepath, string &name);
static std::string SplitRelativeFilename(const std::string& filename, const std::string& basepath)
{
std::string ret;
SplitRelativeFilename(filename, basepath, ret);
return ret;
}
static bool FileExists(string filename);
static u64 GetFileSize(string filename);
// Search the specified path for files which match the specified wildcard
// and return their names in a list.
static std::unique_ptr< list<string> > FindFiles(string path, string wildcard, bool recursive);
protected:
// NOTE: These are pointers so that the operator= works correctly.
// The references used elsewhere cannot be reassigned.
// (Operator= is needed when vectors are resized.)
std::ostream *sout; // stream for output (for commandline, this is cout)
std::ostream *serr; // stream for errors (for commandline, this is cerr)
string filename;
u64 filesize;
// OS file handle
#ifdef _WIN32
HANDLE hFile;
#else
FILE *file;
#endif
// Current offset within the file
u64 offset;
// Does the file exist
bool exists;
protected:
#ifdef _WIN32
static string ErrorMessage(DWORD error);
#endif
};
// This class keeps track of which DiskFile objects exist
// and which file on disk they are associated with.
// It is used to avoid a file being processed twice.
class DiskFileMap
{
public:
DiskFileMap(void);
~DiskFileMap(void);
bool Insert(DiskFile *diskfile);
void Remove(DiskFile *diskfile);
DiskFile* Find(string filename) const;
protected:
map<string, DiskFile*> diskfilemap; // Map from filename to DiskFile
};
class FileSizeCache
{
public:
FileSizeCache();
u64 get(const string &filename);
protected:
map<string, u64> cache;
};
#endif // __DISKFILE_H__
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