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package pointer
import (
"fmt"
"log"
"os"
"github.com/pkg/term"
)
var defaultInputLastChar *int = nil
func DefaultCharacterInput() int {
if defaultInputLastChar != nil {
c := *defaultInputLastChar
defaultInputLastChar = nil
return c
}
t, err := term.Open("/dev/stdin")
if err != nil {
log.Fatalf("Could not open stdin: %+v", err)
}
defer t.Close()
defer t.Restore()
term.RawMode(t)
b := make([]byte, 1)
i, err := os.Stdin.Read(b)
if err != nil {
log.Fatalf("Error in DefaultCharacterInput { b: %c, i: %d, err: %+v }", b[0], i, err)
}
return int(b[0])
}
func DefaultDecimalInput() int {
var v int
for {
c := DefaultCharacterInput()
if c >= '0' && c <= '9' {
v = c - '0'
break
}
}
for {
c := DefaultCharacterInput()
if c >= '0' && c <= '9' {
v = v*10 + c - '0'
} else {
defaultInputLastChar = &c
break
}
}
return v
}
func DefaultCharacterOutput(c int) {
fmt.Printf("%c", c)
}
func DefaultDecimalOutput(c int) {
fmt.Printf("%d ", c)
}
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