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/* Copyright (C) 2008 PrimeBase Technologies GmbH, Germany
*
* PrimeBase Media Stream for MySQL
*
* This program 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.
*
* This program 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Original author: Paul McCullagh (H&G2JCtL)
* Continued development: Barry Leslie
*
* 2007-06-07
*
* CORE SYSTEM:
* Basic file I/O.
*
*/
#ifndef __CSFILE_H__
#define __CSFILE_H__
#include <stdio.h>
#include "CSDefs.h"
#include "CSPath.h"
#include "CSException.h"
#include "CSSys.h"
class CSOutputStream;
class CSInputStream;
class CSFile : public CSSysFile, public CSRefObject {
public:
CSPath *myFilePath;
static const int DEFAULT = 0; // Open for read/write, error if it does not exist.
static const int READONLY = 1; // Open for readonly
static const int CREATE = 2; // Create if it does not exist
static const int TRUNCATE = 4; // After open, set EOF to zero
CSFile(): myFilePath(NULL), iMode(-1), iLocked(0) { }
virtual ~CSFile();
CSOutputStream *getOutputStream();
CSOutputStream *getOutputStream(off64_t offset);
CSInputStream *getInputStream();
CSInputStream *getInputStream(off64_t offset);
/*
* Open the file in the specified
* mode.
*/
virtual void open(int mode);
/* Lock the file. The file will be unlocked
* when closed.
*/
virtual void lock();
virtual void unlock();
/*
* Close the file.
*/
virtual void close();
/*
* Calculate the Md5 digest for the file.
*/
void md5Digest(Md5Digest *digest);
/*
* Move the current position to
* the end of the file.
*/
virtual off64_t getEOF();
virtual void setEOF(off64_t offset);
/*
* Read a given number of bytes. This function
* throws an error if the number of bytes read
* ius less than 'min_size'.
*/
virtual size_t read(void *data, off64_t offset, size_t size, size_t min_size);
/*
* Write the given number of bytes.
* Throws IOException if an error occurs.
*/
virtual void write(const void *data, off64_t offset, size_t size);
/*
* Flush the data written.
*/
virtual void flush();
/* Flush the OS buffers: */
virtual void sync() ;
/* Resets access and modification times of the file: */
virtual void touch();
/*
* Return a platform specific prefered
* line ending for text files.
*/
virtual const char *getEOL() { return "\n"; };
virtual const char *getPathString() { return myFilePath->getCString(); }
bool exists() { return myFilePath->exists(); }
friend class CSReadBufferedFile;
private:
int iMode;
int iLocked;
virtual void openFile(int mode);
bool try_CreateAndOpen(CSThread *self, int mode, bool retry);
public:
void streamOut(CSOutputStream *dst_stream, off64_t src_offset, off64_t size, char *buffer, size_t buffer_size);
void streamIn(CSInputStream *src_stream, off64_t dst_offset, off64_t size, char *buffer, size_t buffer_size);
static bool isDirNotFound(CSException *e) { return e->getErrorCode() == ENOENT; }
static bool isDirExists(CSException *e) { return e->getErrorCode() == EEXIST; }
static bool transfer(CSFile *dst_file, off64_t dst_offset, CSFile *src_file, off64_t src_offset, off64_t size, char *buffer, size_t buffer_size);
static CSFile *newFile(CSPath *path);
static CSFile *newFile(const char *path);
static CSFile *newFile(const char *dir_str, const char *path_str);
};
// This stuff needs to be retought.
#ifdef DEBUG
#define SC_DEFAULT_FILE_BUFFER_SIZE 127
#else
#define SC_DEFAULT_FILE_BUFFER_SIZE (64 * 1024)
#endif
class CSReadBufferedFile : public CSRefObject {
public:
CSReadBufferedFile();
~CSReadBufferedFile();
void setFile(CSFile *file) {myFile = file;}
const char *getPathString() { return myFile->getPathString(); }
void open(int mode) {myFile->open(mode); }
void close();
off64_t getEOF();
void setEOF(off64_t offset);
size_t read(void *data, off64_t offset, size_t size, size_t min_size);
void write(const void *data, off64_t offset, size_t size);
void flush();
void sync();
const char *getEOL();
private:
CSFile *myFile;
char iFileBuffer[SC_DEFAULT_FILE_BUFFER_SIZE];
off64_t iFileBufferOffset;
size_t iBufferDataLen;
virtual void openFile(int mode);
};
#endif
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