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package textproto
import (
"bufio"
"fmt"
"io"
"strconv"
"strings"
)
type FIReader struct {
r *bufio.Reader
line *string
err error
}
func NewFIReader(r io.Reader) *FIReader {
return &FIReader{
r: bufio.NewReader(r),
}
}
func (fir *FIReader) ReadLine() (line string, err error) {
for len(line) <= 1 {
line, err = fir.r.ReadString('\n')
if err != nil {
return
}
}
if strings.HasPrefix(line, "data ") {
if line[5:7] == "<<" {
// Delimited format
delim := line[7 : len(line)-1]
suffix := "\n" + delim + "\n"
for !strings.HasSuffix(line, suffix) {
var _line string
_line, err = fir.r.ReadString('\n')
line += _line
if err != nil {
return
}
}
} else {
// Exact byte count format
var size int
size, err = strconv.Atoi(line[5 : len(line)-1])
if err != nil {
return
}
data := make([]byte, size)
_, err = io.ReadFull(fir.r, data)
line += string(data)
}
}
return
}
type FIWriter struct {
w io.Writer
}
func NewFIWriter(w io.Writer) *FIWriter {
return &FIWriter{
w: w,
}
}
func (fiw *FIWriter) WriteLine(a ...interface{}) error {
_, err := fmt.Fprintln(fiw.w, a...)
return err
}
func (fiw *FIWriter) WriteData(data string) error {
err := fiw.WriteLine("data", len(data))
if err != nil {
return err
}
_, err = io.WriteString(fiw.w, data)
return err
}
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