Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/parsers/wavefront/scanner.go

@@ -0,0 +1,65 @@
+package wavefront
+
+import (
+	"bufio"
+	"io"
+)
+
+// Lexical Point Scanner
+type PointScanner struct {
+	r *bufio.Reader
+}
+
+func NewScanner(r io.Reader) *PointScanner {
+	return &PointScanner{r: bufio.NewReader(r)}
+}
+
+// read reads the next rune from the buffered reader.
+// Returns rune(0) if an error occurs (or io.EOF is returned).
+func (s *PointScanner) read() rune {
+	ch, _, err := s.r.ReadRune()
+	if err != nil {
+		return eof
+	}
+	return ch
+}
+
+// Scan returns the next token and literal value.
+func (s *PointScanner) Scan() (Token, string) {
+	// Read the next rune
+	ch := s.read()
+	if isWhitespace(ch) {
+		return Ws, string(ch)
+	} else if isLetter(ch) {
+		return Letter, string(ch)
+	} else if isNumber(ch) {
+		return Number, string(ch)
+	} else if isDelta(ch) {
+		return Delta, string(ch)
+	}
+
+	// Otherwise read the individual character.
+	switch ch {
+	case eof:
+		return EOF, ""
+	case '\n':
+		return Newline, string(ch)
+	case '.':
+		return Dot, string(ch)
+	case '-':
+		return MinusSign, string(ch)
+	case '_':
+		return Underscore, string(ch)
+	case '/':
+		return Slash, string(ch)
+	case '\\':
+		return Backslash, string(ch)
+	case ',':
+		return Comma, string(ch)
+	case '"':
+		return Quotes, string(ch)
+	case '=':
+		return Equals, string(ch)
+	}
+	return Illegal, string(ch)
+}