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47 lines
940 B
Go
47 lines
940 B
Go
package iox
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import (
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"bufio"
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"io"
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"strings"
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)
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// A TextLineScanner is a scanner that can scan lines from given reader.
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type TextLineScanner struct {
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reader *bufio.Reader
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hasNext bool
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line string
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err error
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}
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// NewTextLineScanner returns a TextLineScanner with given reader.
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func NewTextLineScanner(reader io.Reader) *TextLineScanner {
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return &TextLineScanner{
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reader: bufio.NewReader(reader),
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hasNext: true,
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}
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}
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// Scan checks if scanner has more lines to read.
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func (scanner *TextLineScanner) Scan() bool {
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if !scanner.hasNext {
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return false
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}
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line, err := scanner.reader.ReadString('\n')
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scanner.line = strings.TrimRight(line, "\n")
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if err == io.EOF {
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scanner.hasNext = false
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return true
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} else if err != nil {
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scanner.err = err
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return false
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}
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return true
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}
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// Line returns the next available line.
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func (scanner *TextLineScanner) Line() (string, error) {
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return scanner.line, scanner.err
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}
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