C++ service_ptr_t::read_object方法代码示例

static void load_id666(service_ptr_t<file> & p_file, LPID666TAG lpTag, abort_callback & p_abort)//must be seeked to correct spot before calling
{
	t_uint8 szBuf[4];
	p_file->read_object( &szBuf, 4, p_abort );

	if( ! memcmp( szBuf, xid6_signature, 4 ) )
	{
		t_uint32 tag_size;
		p_file->read_lendian_t( tag_size, p_abort );

		t_filesize offset = p_file->get_position( p_abort );

		service_ptr_t< reader_limited > m_file = new service_impl_t< reader_limited >;
		m_file->init( p_file, offset, offset + tag_size, p_abort );

		service_ptr_t<file> p_file = m_file.get_ptr();

		try
		{
			parse_id666( p_file, lpTag, false, p_abort );
		}
		catch ( const exception_io_data & )
		{
			p_file->seek( 0, p_abort );

			memset( lpTag, 0, sizeof( *lpTag ) );

			parse_id666( p_file, lpTag, true, p_abort );
		}
	}
	else throw exception_tag_not_found();
}

bool load_feature_list_from_json_file(pfc::list_base_t<feature_handle_ptr> &p_list, const service_ptr_t<file> &p_file, abort_callback &p_abort)
{
	t_filesize size = p_file->get_size(p_abort);

	pfc::string8 json;
	{
		pfc::string_buffer buffer(json, size);
		p_file->read_object(buffer, size, p_abort);
	}

	return load_feature_list_from_json_string(p_list, json);
}

	void open( service_ptr_t<file> m_file, const char * p_path, t_input_open_reason p_reason, abort_callback & p_abort )
	{
		if ( p_reason == input_open_info_write ) throw exception_io_data();
		input_open_file_helper( m_file, p_path, p_reason, p_abort );
		m_stats = m_file->get_stats( p_abort );
		t_uint8            * ptr;
		unsigned             size;
		t_filesize size64 = m_file->get_size_ex( p_abort );
		if ( size64 > ( 1 << 24 ) )
			throw exception_io_data();
		size = (unsigned) size64;
		file_buffer.set_size( size );
		ptr = file_buffer.get_ptr();
		m_file->read_object( ptr, size, p_abort );
		m_player = ModPlug_Load(ptr, size);
		if ( !m_player ) throw exception_io_data();
	}

static void parse_id666( service_ptr_t< file > & p_file, LPID666TAG lpTag, bool aligned, abort_callback & p_abort )
{
	while ( ! p_file->is_eof( p_abort ) )
	{
		t_uint8 id, type;
		t_uint16    data;

		p_file->read_object_t( id, p_abort );
		p_file->read_object_t( type, p_abort );
		p_file->read_lendian_t( data, p_abort );

		switch ( type )
		{
		case XTYPE_STR:
			{
				if ( data < 1 || data > 256 ) throw exception_io_data();

				switch ( id )
				{
				case XID_SONG:
					p_file->read_object( lpTag->szTitle, data, p_abort );
					break;

				case XID_GAME:
					p_file->read_object( lpTag->szGame, data, p_abort );
					break;

				case XID_ARTIST:
					p_file->read_object( lpTag->szArtist, data, p_abort );
					break;

				case XID_PUB:
					p_file->read_object( lpTag->szPublisher, data, p_abort );
					break;

				case XID_OST:
					p_file->read_object( lpTag->szOST, data, p_abort );
					break;

				case XID_DUMPER:
					p_file->read_object( lpTag->szDumper, data, p_abort );
					break;

				case XID_CMNTS:
					p_file->read_object( lpTag->szComment, data, p_abort );
					break;

				default:
					p_file->skip( data, p_abort );
					break;
				}

				if ( aligned && ( data & 3 ) ) p_file->skip( 4 - ( data & 3 ), p_abort );
			}
			break;

		case XTYPE_INT:
			{
				if ( data != 4 ) throw exception_io_data();

				t_uint32 value;
				p_file->read_lendian_t( value, p_abort );

				switch ( id )
				{
				case XID_DATE:
					SetDate( lpTag->szDate, ( value >> 16 ) & 255, ( value >> 8 ) & 255, value & 255 );
					break;

				case XID_INTRO:
					if ( value > 383999999 ) value = 383999999;
					lpTag->uSong_ms = value / 64;
					break;

				case XID_LOOP:
					if ( value > 383999999 ) value = 383999999;
					lpTag->uLoop_ms = value / 64;
					break;

				case XID_END:
					if ( value > 383999999 ) value = 383999999;
					lpTag->uEnd_ms = value / 64;
					break;

				case XID_FADE:
					if ( value > 3839999 ) value = 3839999;
					lpTag->uFade_ms = value / 64;
					break;

				case XID_AMP:
					if ( value < 32768 ) value = 32768;
					else if ( value > 524288 ) value = 524288;
					lpTag->uAmplification = value;
					break;
				}
			}
			break;

		case XTYPE_DATA:
			{
//.........这里部分代码省略.........

	void read_v2(const service_ptr_t<file> & p_file,abort_callback & p_abort,pfc::string_base & p_out,bool & is_utf8, bool forceUTF8) {
		p_out.reset();
		p_file->reopen( p_abort );
		
		pfc::array_t<char> mem;
		t_filesize size64;
		size64 = p_file->get_size(p_abort);
		if (size64 == filesize_invalid)//typically HTTP
		{
			pfc::string8 ansitemp;
			t_size done;
			enum { delta = 1024 * 64, max = 1024 * 512 };

			if ( forceUTF8 ) {
				is_utf8 = true;
			} else {
				is_utf8 = false;
				char temp[3];
				done = p_file->read(temp, 3, p_abort);
				if (done != 3)
				{
					if (done > 0) p_out = pfc::stringcvt::string_utf8_from_ansi(temp, done);
					return;
				}
				if (!memcmp(utf8_header, temp, 3)) is_utf8 = true;
				else ansitemp.add_string(temp, 3);
			}

			mem.set_size(delta);
			
			for(;;)
			{
				done = p_file->read(mem.get_ptr(),delta,p_abort);
				if (done > 0)
				{
					if (is_utf8) p_out.add_string(mem.get_ptr(),done);
					else ansitemp.add_string(mem.get_ptr(),done);
				}
				if (done < delta) break;
			}

			if (!is_utf8)
			{
				p_out = pfc::stringcvt::string_utf8_from_ansi(ansitemp);
			}

			return;
		}
		else
		{
			if (size64>1024*1024*128) throw exception_io_data();//hard limit
			t_size size = pfc::downcast_guarded<t_size>(size64);
			mem.set_size(size+1);
			char * asdf = mem.get_ptr();
			p_file->read_object(asdf,size,p_abort);
			asdf[size]=0;
			if ( forceUTF8 ) {
				is_utf8 = true;
				p_out = asdf;
			} else if (size>3 && !memcmp(utf8_header,asdf,3)) {
				is_utf8 = true; 
				p_out.add_string(asdf+3); 
			} else {
				is_utf8 = false;
				p_out = pfc::stringcvt::string_utf8_from_ansi(asdf);
			}
			return;
		}
	}