62 lines
1,003 B
Go
62 lines
1,003 B
Go
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package pointer
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import (
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"fmt"
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"log"
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"os"
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"github.com/pkg/term"
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)
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var defaultInputLastChar *int = nil
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func DefaultCharacterInput() int {
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if defaultInputLastChar != nil {
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c := *defaultInputLastChar
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defaultInputLastChar = nil
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return c
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}
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t, err := term.Open("/dev/stdin")
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if err != nil {
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log.Fatalf("Could not open stdin: %+v", err)
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}
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defer t.Close()
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defer t.Restore()
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term.RawMode(t)
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b := make([]byte, 1)
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i, err := os.Stdin.Read(b)
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if err != nil {
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log.Fatalf("Error in DefaultCharacterInput { b: %c, i: %d, err: %+v }", b[0], i, err)
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}
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return int(b[0])
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}
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func DefaultDecimalInput() int {
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var v int
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for {
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c := DefaultCharacterInput()
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if c >= '0' && c <= '9' {
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v = c - '0'
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break
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}
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}
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for {
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c := DefaultCharacterInput()
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if c >= '0' && c <= '9' {
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v = v*10 + c - '0'
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} else {
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defaultInputLastChar = &c
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break
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}
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}
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return v
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}
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func DefaultCharacterOutput(c int) {
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fmt.Printf("%c", c)
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}
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func DefaultDecimalOutput(c int) {
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fmt.Printf("%d ", c)
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}
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