60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
package pointer
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import (
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"fmt"
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"os"
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)
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// We keep the last input char to handle a pain point in the funge-98 spec :
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// when reading from the decimal input you need to read until you encounter a
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// non numeric char, but not drop it
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var defaultInputLastChar *int = nil
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func DefaultCharacterInput() (int, error) {
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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, nil
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}
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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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return 0, fmt.Errorf("Error in DefaultCharacterInput { b: %c, i: %d, err: %w }", b[0], i, err)
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}
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return int(b[0]), nil
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}
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func DefaultDecimalInput() (int, error) {
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var v int
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for {
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c, err := DefaultCharacterInput()
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if err != nil {
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return 0, err
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}
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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, err := DefaultCharacterInput()
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if err != nil {
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break
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}
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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, nil
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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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