◆ gpak_open()

GPAK_API gpak_t* gpak_open	(	const char *	_path,
		int	_mode
	)

Brief Description:\n Opens a G-PAK archive.

This function opens a G-PAK archive at the specified _path and with the given _mode.

Parameters

_path	A string containing the path to the G-PAK archive.
_mode	The mode in which to open the G-PAK archive.

Returns: A pointer to the opened gpak_t or NULL if an error occurred.

Definition at line 213 of file gpak.c.

 {
     gpak_t* pak;
     pak = (gpak_t*)calloc(1, sizeof(gpak_t));
     pak->mode_ = _mode;
     pak->current_file_ = NULL;
     pak->error_handler_ = NULL;
     pak->progress_handler_ = NULL;
     pak->user_data_ = NULL;
     pak->dictionary_ = NULL;
  
     const char* open_mode_;
     if (_mode & GPAK_MODE_CREATE)
         open_mode_ = "wb+";
     else if (_mode & GPAK_MODE_READ_ONLY)
         open_mode_ = "rb+";
     else if (_mode & GPAK_MODE_UPDATE)
         open_mode_ = "ab+";
     else
     {
         gpak_close(pak);
         return NULL;
     }
     
     // Trying to open pak file
     pak->stream_ = fopen(_path, open_mode_);
  
     if (pak->stream_ == NULL)
     {
         gpak_close(pak);
         return NULL;
     }
  
     pak->root_ = filesystem_tree_create();
  
     if (_mode & GPAK_MODE_CREATE)
     {
         pak->header_ = _pak_make_header();
         size_t res = _fwriteb(&pak->header_, sizeof(pak_header_t), 1ull, pak->stream_);
         if (res != sizeof(pak_header_t))
         {
             gpak_close(pak);
             return NULL;
         }
     }
     else if (_mode & GPAK_MODE_UPDATE)
     {
         fseek(pak->stream_, 0, SEEK_SET);
  
         size_t res = _freadb(&pak->header_, sizeof(pak_header_t), 1ull, pak->stream_);
         if (_pak_validate_header(pak) != GPAK_ERROR_OK || res != sizeof(pak_header_t))
         {
             gpak_close(pak);
             return NULL;
         }
  
         _gpak_parse_dictionary(pak);
         _gpak_parse_file_tree(pak);
  
         fseek(pak->stream_, 0, SEEK_END);
     }
     else if (_mode & GPAK_MODE_READ_ONLY)
     {
         size_t res = _freadb(&pak->header_, sizeof(pak_header_t), 1ull, pak->stream_);
         if (_pak_validate_header(pak) != GPAK_ERROR_OK || res != sizeof(pak_header_t))
         {
             gpak_close(pak);
             return NULL;
         }
  
         _gpak_parse_dictionary(pak);
         _gpak_parse_file_tree(pak);
     }
  
     return pak;
 }

References gpak::current_file_, gpak::dictionary_, gpak::error_handler_, filesystem_tree_create(), gpak_close(), GPAK_ERROR_OK, GPAK_MODE_CREATE, GPAK_MODE_READ_ONLY, GPAK_MODE_UPDATE, gpak::header_, gpak::mode_, gpak::progress_handler_, gpak::root_, gpak::stream_, and gpak::user_data_.