示例#1
0
func copingMapping(fr mmap.ReaderAt) []int32 {
	_bytes := make([]byte, fr.Len(), fr.Len())

	_, err := fr.ReadAt(_bytes, 0)
	if err != nil {
		fmt.Printf("got error msg: %s", err)
	}

	data := make([]int32, fr.Len()/4, fr.Len()/4)
	buf := bytes.NewBuffer(_bytes)
	binary.Read(buf, binary.LittleEndian, &data)
	return data
}
示例#2
0
func reflectionMapping(fr *mmap.ReaderAt, typeSize int) []int32 {
	_bytes := make([]byte, fr.Len(), fr.Len())

	_, err := fr.ReadAt(_bytes, 0)
	if err != nil {
		fmt.Printf("got error msg: %s", err)
	}
	header := *(*reflect.SliceHeader)(unsafe.Pointer(&_bytes))

	// The length and capacity of the slice are different.
	header.Len /= typeSize // 8 + 4 + 1
	header.Cap /= typeSize // 8 + 4 + 1

	// Convert slice header to a []byte
	return *(*[]int32)(unsafe.Pointer(&header))
}