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84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
package main
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import (
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"bufio"
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"errors"
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"fmt"
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"github.com/jordanorelli/skeam/cm"
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"io"
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"net"
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)
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const MAX_SEXP_LINES = 40
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var manager = cm.New()
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var errSexpTooLong = errors.New("error: sexp is too long")
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type tcpInterpreter struct {
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fout io.Writer // buffered file-like output stream
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ferr io.Writer // buffered file-like error stream
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tokens chan token // tokens returns from the lexer
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values chan interface{} // values returned from the interpreter
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errors chan error // errors returned from the interpreter
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}
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func runTCPServer() {
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addr, err := net.ResolveTCPAddr("tcp", *tcpAddr)
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if err != nil {
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die(err.Error())
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}
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ln, err := net.ListenTCP("tcp", addr)
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if err != nil {
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die(err.Error())
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}
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for {
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conn, err := ln.AcceptTCP()
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if err != nil {
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printErrorMsg(err.Error())
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continue
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}
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go startConnection(conn, manager)
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}
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}
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func newTcpInterpreter() *tcpInterpreter {
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return &tcpInterpreter{
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tokens: make(chan token),
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values: make(chan interface{}),
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errors: make(chan error),
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}
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}
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func (t *tcpInterpreter) send() {
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for {
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select {
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case v := <-t.values:
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if _, err := fmt.Fprintln(t.fout, v); err != nil {
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fmt.Println("can't write out to client: ", err)
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}
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case e := <-t.errors:
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if _, err := fmt.Fprintln(t.ferr, e); err != nil {
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fmt.Println("can't write error to client: ", err)
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}
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}
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}
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}
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func (t *tcpInterpreter) Run(in io.Reader, out, errors io.Writer) {
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go lex(bufio.NewReader(in), t.tokens)
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t.fout = out
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t.ferr = errors
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go t.send()
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evalall(t.tokens, t.values, t.errors, universe)
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}
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func startConnection(conn net.Conn, m *cm.Manager) {
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m.Add(conn)
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defer m.Remove(conn)
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i := newTcpInterpreter()
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i.Run(conn, conn, conn)
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}
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