1 files changed, 77 insertions, 0 deletions

diff --git a/libgo/go/template/format.go b/libgo/go/template/format.go
new file mode 100644
index 000000000..9156b0808
--- /dev/null
+++ b/libgo/go/template/format.go
@@ -0,0 +1,77 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Template library: default formatters
+
+package template
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+)
+
+// StringFormatter formats into the default string representation.
+// It is stored under the name "str" and is the default formatter.
+// You can override the default formatter by storing your default
+// under the name "" in your custom formatter map.
+func StringFormatter(w io.Writer, format string, value ...interface{}) {
+	if len(value) == 1 {
+		if b, ok := value[0].([]byte); ok {
+			w.Write(b)
+			return
+		}
+	}
+	fmt.Fprint(w, value...)
+}
+
+var (
+	esc_quot = []byte(""") // shorter than """
+	esc_apos = []byte("'") // shorter than "'"
+	esc_amp  = []byte("&")
+	esc_lt   = []byte("<")
+	esc_gt   = []byte(">")
+)
+
+// HTMLEscape writes to w the properly escaped HTML equivalent
+// of the plain text data s.
+func HTMLEscape(w io.Writer, s []byte) {
+	var esc []byte
+	last := 0
+	for i, c := range s {
+		switch c {
+		case '"':
+			esc = esc_quot
+		case '\'':
+			esc = esc_apos
+		case '&':
+			esc = esc_amp
+		case '<':
+			esc = esc_lt
+		case '>':
+			esc = esc_gt
+		default:
+			continue
+		}
+		w.Write(s[last:i])
+		w.Write(esc)
+		last = i + 1
+	}
+	w.Write(s[last:])
+}
+
+// HTMLFormatter formats arbitrary values for HTML
+func HTMLFormatter(w io.Writer, format string, value ...interface{}) {
+	ok := false
+	var b []byte
+	if len(value) == 1 {
+		b, ok = value[0].([]byte)
+	}
+	if !ok {
+		var buf bytes.Buffer
+		fmt.Fprint(&buf, value...)
+		b = buf.Bytes()
+	}
+	HTMLEscape(w, b)
+}