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50 lines
705 B
Go
50 lines
705 B
Go
package main
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import (
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"strings"
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)
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type ring struct {
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buf [70]byte
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start, end int
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}
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func (r *ring) writeByte(b byte) {
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r.buf[r.end] = b
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r.end = (r.end + 1) % len(r.buf)
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if r.end == r.start {
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r.start = (r.start + 1) % len(r.buf)
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}
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}
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func (r *ring) string() string {
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var lines []byte
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newlineCount := 0
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for i := r.end - 1; ; i-- {
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if i < 0 {
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i = len(r.buf) - 1
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}
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if r.buf[i] == '\n' {
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newlineCount++
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if newlineCount == 2 {
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break
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}
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}
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lines = append(lines, r.buf[i])
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if i == r.start {
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break
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}
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}
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for i, j := 0, len(lines)-1; i < j; i, j = i+1, j-1 {
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lines[i], lines[j] = lines[j], lines[i]
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}
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return strings.TrimRight(string(lines), "\t \n")
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}
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