migrate code for github

vendor/github.com/DisposaBoy/JsonConfigReader/reader.go

@@ -0,0 +1,94 @@
+package JsonConfigReader
+
+import (
+	"bytes"
+	"io"
+)
+
+type state struct {
+	r  io.Reader
+	br *bytes.Reader
+}
+
+func isNL(c byte) bool {
+	return c == '\n' || c == '\r'
+}
+
+func isWS(c byte) bool {
+	return c == ' ' || c == '\t' || isNL(c)
+}
+
+func consumeComment(s []byte, i int) int {
+	if i < len(s) && s[i] == '/' {
+		s[i-1] = ' '
+		for ; i < len(s) && !isNL(s[i]); i += 1 {
+			s[i] = ' '
+		}
+	}
+	return i
+}
+
+func prep(r io.Reader) (s []byte, err error) {
+	buf := &bytes.Buffer{}
+	_, err = io.Copy(buf, r)
+	s = buf.Bytes()
+	if err != nil {
+		return
+	}
+
+	i := 0
+	for i < len(s) {
+		switch s[i] {
+		case '"':
+			i += 1
+			for i < len(s) {
+				if s[i] == '"' {
+					i += 1
+					break
+				} else if s[i] == '\\' {
+					i += 1
+				}
+				i += 1
+			}
+		case '/':
+			i = consumeComment(s, i+1)
+		case ',':
+			j := i
+			for {
+				i += 1
+				if i >= len(s) {
+					break
+				} else if s[i] == '}' || s[i] == ']' {
+					s[j] = ' '
+					break
+				} else if s[i] == '/' {
+					i = consumeComment(s, i+1)
+				} else if !isWS(s[i]) {
+					break
+				}
+			}
+		default:
+			i += 1
+		}
+	}
+	return
+}
+
+// Read acts as a proxy for the underlying reader and cleans p
+// of comments and trailing commas preceeding ] and }
+// comments are delimitted by // up until the end the line
+func (st *state) Read(p []byte) (n int, err error) {
+	if st.br == nil {
+		var s []byte
+		if s, err = prep(st.r); err != nil {
+			return
+		}
+		st.br = bytes.NewReader(s)
+	}
+	return st.br.Read(p)
+}
+
+// New returns an io.Reader acting as proxy to r
+func New(r io.Reader) io.Reader {
+	return &state{r: r}
+}