Golang ReadConsole 예제들

예제 #1

파일: file_windows.go 프로젝트: pkdevboxy/appscale

// readConsole reads utf16 characters from console File,
// encodes them into utf8 and stores them in buffer b.
// It returns the number of utf8 bytes read and an error, if any.
func (f *File) readConsole(b []byte) (n int, err error) {
	if len(b) == 0 {
		return 0, nil
	}
	if len(f.readbuf) == 0 {
		// get more input data from os
		wchars := make([]uint16, len(b))
		var p *uint16
		if len(b) > 0 {
			p = &wchars[0]
		}
		var nw uint32
		err := syscall.ReadConsole(f.fd, p, uint32(len(wchars)), &nw, nil)
		if err != nil {
			return 0, err
		}
		f.readbuf = utf16.Decode(wchars[:nw])
	}
	for i, r := range f.readbuf {
		if utf8.RuneLen(r) > len(b) {
			f.readbuf = f.readbuf[i:]
			return n, nil
		}
		nr := utf8.EncodeRune(b, r)
		b = b[nr:]
		n += nr
	}
	f.readbuf = nil
	return n, nil
}

예제 #2

파일: file_windows.go 프로젝트: h8liu/golang

// readConsole reads utf16 characters from console File,
// encodes them into utf8 and stores them in buffer b.
// It returns the number of utf8 bytes read and an error, if any.
func (f *File) readConsole(b []byte) (n int, err error) {
	if len(b) == 0 {
		return 0, nil
	}
	if len(f.readbuf) == 0 {
		// syscall.ReadConsole seems to fail, if given large buffer.
		// So limit the buffer to 16000 characters.
		numBytes := len(b)
		if numBytes > 16000 {
			numBytes = 16000
		}
		// get more input data from os
		wchars := make([]uint16, numBytes)
		var p *uint16
		if len(b) > 0 {
			p = &wchars[0]
		}
		var nw uint32
		err := syscall.ReadConsole(f.fd, p, uint32(len(wchars)), &nw, nil)
		if err != nil {
			return 0, err
		}
		f.readbuf = utf16.Decode(wchars[:nw])
	}
	for i, r := range f.readbuf {
		if utf8.RuneLen(r) > len(b) {
			f.readbuf = f.readbuf[i:]
			return n, nil
		}
		nr := utf8.EncodeRune(b, r)
		b = b[nr:]
		n += nr
	}
	f.readbuf = nil
	return n, nil
}