gilo/gilo.go

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package main
import (
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"bufio"
"fmt"
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"golang.org/x/term"
"os"
)
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func isAscii(char rune) bool {
ord := int(char)
return ord < 0x80
}
func isCtrl(char rune) bool {
if ! isAscii(char) {
return false
}
ord:= int(char)
return ord == 0x7f || ord < 0x20
}
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// Put the terminal in
func goRaw() *term.State {
oldState, err := term.MakeRaw(int(os.Stdin.Fd()))
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if err != nil {
panic(err)
}
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return oldState
}
// Print a formatted string to stdout, with CRLF line endings for proper terminal formatting
func outLn(format string, a ...interface{}) {
formatted := fmt.Sprintf(format, a...)
fmt.Printf("%s\r\n", formatted)
}
func main() {
// Go to proper raw mode, but restore canonical mode at extit
oldState := goRaw()
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defer term.Restore(int(os.Stdin.Fd()), oldState)
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reader := bufio.NewReader(os.Stdin)
for {
char, _, err := reader.ReadRune()
if err != nil {
panic(err)
}
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// Ugliest syntax structure ever?
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switch {
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case char == 'q':
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outLn("bye!")
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return
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case isCtrl(char):
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outLn("%d", char)
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default:
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outLn("%d ('%c')", char, char)
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}
}
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}