1 files changed, 39 insertions, 0 deletions
diff --git a/vendor/github.com/spkg/bom/bom.go b/vendor/github.com/spkg/bom/bom.go
new file mode 100644
index 000000000..93b811c6d
--- /dev/null
+++ b/vendor/github.com/spkg/bom/bom.go
@@ -0,0 +1,39 @@
+// Package bom is used to clean up UTF-8 Byte Order Marks.
+package bom
+
+import (
+	"bufio"
+	"io"
+)
+
+const (
+	bom0 = 0xef
+	bom1 = 0xbb
+	bom2 = 0xbf
+)
+
+// Clean returns b with the 3 byte BOM stripped off the front if it is present.
+// If the BOM is not present, then b is returned.
+func Clean(b []byte) []byte {
+	if len(b) >= 3 &&
+		b[0] == bom0 &&
+		b[1] == bom1 &&
+		b[2] == bom2 {
+		return b[3:]
+	}
+	return b
+}
+
+// NewReader returns an io.Reader that will skip over initial UTF-8 byte order marks.
+func NewReader(r io.Reader) io.Reader {
+	buf := bufio.NewReader(r)
+	b, err := buf.Peek(3)
+	if err != nil {
+		// not enough bytes
+		return buf
+	}
+	if b[0] == bom0 && b[1] == bom1 && b[2] == bom2 {
+		discardBytes(buf, 3)
+	}
+	return buf
+}