DataBufferFile.cpp

   1 #include <string.h>
   2 #include "DataBufferFile.hpp"
   3
   4 DataBufferFile::DataBufferFile( FILE* f, int secondaryBufferSize )
   5         : m_file( f )
   6         , m_secBuf( new char[secondaryBufferSize] )
   7         , m_secBufSize( 0 )
   8 {
   9 }
  10
  11 DataBufferFile::~DataBufferFile()
  12 {
  13         delete[] m_secBuf;
  14
  15         fclose( m_file );
  16 }
  17
  18 int DataBufferFile::Read( void* ptr, int size )
  19 {
  20         int bufSize = m_secBufSize;
  21         m_secBufSize = 0;
  22
  23         memcpy( ptr, m_secBuf, bufSize );
  24
  25         return fread( (char*)ptr + bufSize, 1, size - bufSize, m_file ) + bufSize;
  26 }
  27
  28 int DataBufferFile::Write( void* ptr, int size )
  29 {
  30         return fwrite( ptr, size, 1, m_file );
  31 }
  32
  33 void DataBufferFile::Store( void* ptr, int size )
  34 {
  35         memcpy( m_secBuf, ptr, size );
  36         m_secBufSize = size;
  37 }