func (s *Stack) Push(header, data []byte) (depth int, err error) {
	s.guard.Lock()
	defer s.guard.Unlock()
	s.lastAccess = time.Now()
	file, err := s.getFile()
	if err != nil {
		return -1, err
	}
	// Seek to place for next block
	currentOffset, err := file.Seek(s.currentBlock.NextBlockPoint(), os.SEEK_SET)
	if err != nil {
		return -1, err
	}
	// Get place for payload
	bodyOffset := currentOffset + fileBlockDefineSize
	block := fileBlock{
		PrevBlock:   uint64(s.currentBlockPos),
		HeaderPoint: uint64(bodyOffset),
		HeaderSize:  uint64(len(header)),
		DataPoint:   uint64(bodyOffset) + uint64(len(header)),
		DataSize:    uint64(len(data)),
	}
	// Write block meta-info
	err = binary.Write(file, binary.LittleEndian, block)
	if err != nil {
		file.Seek(currentOffset, os.SEEK_SET)
		return -1, err
	}
	// Write header
	_, err = file.Write(header)
	if err != nil {
		file.Seek(currentOffset, os.SEEK_SET)
		return -1, err
	}
	// Write data
	_, err = file.Write(data)
	if err != nil {
		file.Seek(currentOffset, os.SEEK_SET)
		return -1, err
	}
	s.depth++
	s.currentBlockPos = currentOffset
	s.currentBlock = block
	return s.depth, nil
}
func (s *Stack) Push(header, data []byte) (depth int, err error) {
	s.guard.Lock()
	defer s.guard.Unlock()
	s.lastAccess = time.Now()
	file, err := s.getFile()
	if err != nil {
		return -1, err
	}
	
	currentOffset, err := file.Seek(s.currentBlock.NextBlockPoint(), os.SEEK_SET)
	if err != nil {
		return -1, err
	}
	
	bodyOffset := currentOffset + fileBlockDefineSize
	block := fileBlock{
		PrevBlock:   uint64(s.currentBlockPos),
		HeaderPoint: uint64(bodyOffset),
		HeaderSize:  uint64(len(header)),
		DataPoint:   uint64(bodyOffset) + uint64(len(header)),
		DataSize:    uint64(len(data)),
	}
	
	err = binary.Write(file, binary.LittleEndian, block)
	if err != nil {
		file.Seek(currentOffset, os.SEEK_SET)
		return -1, err
	}
	
	_, err = file.Write(header)
	if err != nil {
		file.Seek(currentOffset, os.SEEK_SET)
		return -1, err
	}
	
	_, err = file.Write(data)
	if err != nil {
		file.Seek(currentOffset, os.SEEK_SET)
		return -1, err
	}
	s.depth++
	s.currentBlockPos = currentOffset
	s.currentBlock = block
	return s.depth, nil
}
func ( s * Stack ) Push ( header , data [ ] byte ) ( depth int , err error ) { s . guard . Lock ( ) defer s . guard . Unlock ( ) s . lastAccess = time . Now ( ) file , err := s . getFile ( ) if err != nil { return - 1 , err } // Seek to place for next block currentOffset , err := file . Seek ( s . currentBlock . NextBlockPoint ( ) , os . SEEK_SET ) if err != nil { return - 1 , err } // Get place for payload bodyOffset := currentOffset + fileBlockDefineSize block := fileBlock { PrevBlock : uint64 ( s . currentBlockPos ) , HeaderPoint : uint64 ( bodyOffset ) , HeaderSize : uint64 ( len ( header ) ) , DataPoint : uint64 ( bodyOffset ) + uint64 ( len ( header ) ) , DataSize : uint64 ( len ( data ) ) , } // Write block meta-info err = binary . Write ( file , binary . LittleEndian , block ) if err != nil { file . Seek ( currentOffset , os . SEEK_SET ) return - 1 , err } // Write header _ , err = file . Write ( header ) if err != nil { file . Seek ( currentOffset , os . SEEK_SET ) return - 1 , err } // Write data _ , err = file . Write ( data ) if err != nil { file . Seek ( currentOffset , os . SEEK_SET ) return - 1 , err } s . depth ++ s . currentBlockPos = currentOffset s . currentBlock = block return s . depth , nil }
// Push header and body to stack. Returns new value of stack depth
Push header and body to stack . Returns new value of stack depth