smmmapin.hh

// Licensed GNU LGPL v2.1 or later: http://www.gnu.org/licenses/lgpl-2.1.html
 
#ifndef SPECTMORPH_MMAP_IN_HH
#define SPECTMORPH_MMAP_IN_HH
 
#include <string>
#include <glib.h>
#include "smgenericin.hh"
 
namespace SpectMorph
{
 
class MMapIn : public GenericIn
{
  unsigned char *mapfile;
  unsigned char *mapend;
  unsigned char *pos;
  GMappedFile   *g_mapped_file;
 
  MMapIn (unsigned char *mapfile, unsigned char *mapend, GMappedFile *g_mapped_file);
  ~MMapIn();
public:
  static GenericIn* open (const std::string& filename);
  static GenericIn* open_mem (unsigned char *mem_start, unsigned char *mem_end);
 
  int get_byte();     // like fgetc
  int read (void *ptr, size_t size);
  bool skip (size_t size);
  unsigned char *mmap_mem (size_t& remaining);
  size_t get_pos();
  GenericIn *open_subfile (size_t pos, size_t len);
};
 
}
 
#endif /* SPECTMORPH_MMAP_IN_HH */