init: 自 zomaintain/backend/rdplib 平移独立成库; module path 从上游 github.com/nakagami/grdp 改为 git.zeroonesoft.cn/golib/rdplib

core/io.go

@@ -0,0 +1,131 @@
+package core
+
+import (
+	"encoding/binary"
+	"io"
+)
+
+type ReadBytesComplete func(result []byte, err error)
+
+func StartReadBytes(len int, r io.Reader, cb ReadBytesComplete) {
+	b := make([]byte, len)
+	go func() {
+		_, err := io.ReadFull(r, b)
+		cb(b, err)
+	}()
+}
+
+func ReadBytes(len int, r io.Reader) ([]byte, error) {
+	b := make([]byte, len)
+	length, err := io.ReadFull(r, b)
+	return b[:length], err
+}
+
+func ReadByte(r io.Reader) (byte, error) {
+	var buf [1]byte
+	_, err := io.ReadFull(r, buf[:])
+	return buf[0], err
+}
+
+func ReadUInt8(r io.Reader) (uint8, error) {
+	var buf [1]byte
+	_, err := io.ReadFull(r, buf[:])
+	return buf[0], err
+}
+
+func ReadUint16LE(r io.Reader) (uint16, error) {
+	var buf [2]byte
+	_, err := io.ReadFull(r, buf[:])
+	if err != nil {
+		return 0, err
+	}
+	return binary.LittleEndian.Uint16(buf[:]), nil
+}
+
+func ReadUint16BE(r io.Reader) (uint16, error) {
+	var buf [2]byte
+	_, err := io.ReadFull(r, buf[:])
+	if err != nil {
+		return 0, err
+	}
+	return binary.BigEndian.Uint16(buf[:]), nil
+}
+
+func ReadUInt32LE(r io.Reader) (uint32, error) {
+	var buf [4]byte
+	_, err := io.ReadFull(r, buf[:])
+	if err != nil {
+		return 0, err
+	}
+	return binary.LittleEndian.Uint32(buf[:]), nil
+}
+
+func ReadUInt32BE(r io.Reader) (uint32, error) {
+	var buf [4]byte
+	_, err := io.ReadFull(r, buf[:])
+	if err != nil {
+		return 0, err
+	}
+	return binary.BigEndian.Uint32(buf[:]), nil
+}
+
+func WriteByte(data byte, w io.Writer) (int, error) {
+	buf := [1]byte{data}
+	return w.Write(buf[:])
+}
+
+func WriteBytes(data []byte, w io.Writer) (int, error) {
+	return w.Write(data)
+}
+
+func WriteUInt8(data uint8, w io.Writer) (int, error) {
+	buf := [1]byte{data}
+	return w.Write(buf[:])
+}
+
+func WriteUInt16BE(data uint16, w io.Writer) (int, error) {
+	var buf [2]byte
+	binary.BigEndian.PutUint16(buf[:], data)
+	return w.Write(buf[:])
+}
+
+func WriteUInt16LE(data uint16, w io.Writer) (int, error) {
+	var buf [2]byte
+	binary.LittleEndian.PutUint16(buf[:], data)
+	return w.Write(buf[:])
+}
+
+func WriteUInt32LE(data uint32, w io.Writer) (int, error) {
+	var buf [4]byte
+	binary.LittleEndian.PutUint32(buf[:], data)
+	return w.Write(buf[:])
+}
+
+func WriteUInt32BE(data uint32, w io.Writer) (int, error) {
+	var buf [4]byte
+	binary.BigEndian.PutUint32(buf[:], data)
+	return w.Write(buf[:])
+}
+
+func PutUint16BE(data uint16) (uint8, uint8) {
+	return uint8(data >> 8), uint8(data)
+}
+
+func Uint16BE(d0, d1 uint8) uint16 {
+	return uint16(d0)<<8 | uint16(d1)
+}
+
+func RGB565ToRGB(data uint16) (r, g, b uint8) {
+	r = uint8((data & 0xF800) >> 8)
+	g = uint8((data & 0x07E0) >> 3)
+	b = uint8((data & 0x001F) << 3)
+
+	return
+}
+func RGB555ToRGB(data uint16) (r, g, b uint8) {
+	r = uint8((data & 0x7C00) >> 7)
+	g = uint8((data & 0x03E0) >> 2)
+	b = uint8((data & 0x001F) << 3)
+
+	return
+}