/********************************************************************** <BR>
  This file is part of Crack dot Com's free source code release of
  Golgotha. <a href="http://www.crack.com/golgotha_release"> <BR> for
  information about compiling & licensing issues visit this URL</a> 
  <PRE> If that doesn't help, contact Jonathan Clark at 
  golgotha_source@usa.net (Subject should have "GOLG" in it) 
***********************************************************************/

#ifndef I4_DIR_LOAD_HH
#define I4_DIR_LOAD_HH



#include "file/file.hh"
#include "memory/array.hh"
#include "error/error.hh"

struct i4_loader_section_type
{
  w32 section_id;
  w32 section_offset;
  w32 section_size;
  i4_loader_section_type(w32 section_id, w32 section_offset)
    : section_offset(section_offset), section_id(section_id) {}
};


class i4_loader_class : public i4_file_class
{
protected:
  i4_file_class *in;
  i4_array<i4_loader_section_type> sections;

  i4_bool close_on_delete, _error;
  sw32 last;
  int seek_to_before_using; 
  int find_section(w32 section_id);
public: 

  i4_bool error() { return _error; }

  i4_loader_class(i4_file_class *in, i4_bool close_on_delete=i4_T);

  i4_bool goto_section(w32 section_id);
  i4_bool goto_section(char *section_name);       // calls above with checksum of name
 
  i4_bool get_section_info(char *section_name, w32 &offset, w32 &size);

  // if version numbers don't match AND seek_on_fail is i4_T, file pointer 
  // is advanced to the spot where
  // end_version was called when saving and i4_F is returned
  i4_bool check_version(w16 version);
  void end_version(I4_LF_ARGS);          // verifies you read the proper amount of data

  //check_version replaced with get_version
  void get_version(w16 &version,w16 &data_size);
  
  
  virtual w32 read (void *buffer, w32 size);
  virtual w32 write(const void *buffer, w32 size);

  virtual w32 seek (w32 offset);
  virtual w32 size ();
  virtual w32 tell ();

  virtual ~i4_loader_class();
};

// returns NULL if file is corrupted
i4_loader_class *i4_open_save_file(i4_file_class *in,
                                   i4_bool close_on_delete_or_fail=i4_T);

// this function will insert data into a demo_file
i4_bool i4_insert_sections(i4_file_class *in, i4_file_class *out,
                           int total_sections_to_insert,
                           i4_file_class **section_data,
                           char **section_names);

#endif