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//$$FILE$$
//$$VERSION$$
//$$DATE$$
//$$LICENSE$$
/*
** Class for blockwise IO operations
*/
#ifdef VLAD_DECIDE
#include <strings.h>
#endif
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <string>
#include "rcsb_types.h"
#include "Exceptions.h"
#include "GenString.h"
#include "BlockIO.h"
using std::string;
BlockIO::BlockIO()
{
memset(_buffer, 0, BLKSIZE);
}
BlockIO::~BlockIO()
{
}
unsigned int BlockIO::ReadBlock(const int fd, const UInt32 blockNum)
{
if (lseek(fd, BLKSIZE * blockNum, SEEK_SET) == -1)
{
throw FileException(string("Could not seek in the file with fd: ") + \
String::IntToString(fd), "BlockIO::ReadBlock");
}
// VLAD - CHECK FOR -1 AND THROW EXCEPTION
return read(fd, _buffer, BLKSIZE);
}
unsigned int BlockIO::WriteBlock(const int fd, const UInt32 blockNum)
{
if (lseek(fd, blockNum * BLKSIZE, SEEK_SET) == -1)
{
throw FileException(string("Could not seek in the file with fd: ") + \
String::IntToString(fd), "BlockIO::WriteBlock");
}
// VLAD - CHECK FOR -1 AND THROW EXCEPTION
return write(fd, _buffer, BLKSIZE);
}
void BlockIO::AssociateBuffer(char** newBuffer)
{
*newBuffer = (char*)_buffer;
}
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