initial import

core/iox/textlinescanner.go

@@ -0,0 +1,42 @@
+package iox
+
+import (
+	"bufio"
+	"io"
+	"strings"
+)
+
+type TextLineScanner struct {
+	reader  *bufio.Reader
+	hasNext bool
+	line    string
+	err     error
+}
+
+func NewTextLineScanner(reader io.Reader) *TextLineScanner {
+	return &TextLineScanner{
+		reader:  bufio.NewReader(reader),
+		hasNext: true,
+	}
+}
+
+func (scanner *TextLineScanner) Scan() bool {
+	if !scanner.hasNext {
+		return false
+	}
+
+	line, err := scanner.reader.ReadString('\n')
+	scanner.line = strings.TrimRight(line, "\n")
+	if err == io.EOF {
+		scanner.hasNext = false
+		return true
+	} else if err != nil {
+		scanner.err = err
+		return false
+	}
+	return true
+}
+
+func (scanner *TextLineScanner) Line() (string, error) {
+	return scanner.line, scanner.err
+}