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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libgo/go/template/format.go | |
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Diffstat (limited to 'libgo/go/template/format.go')
-rw-r--r-- | libgo/go/template/format.go | 77 |
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) +} |