1// Copyright 2015 Garrett D'Amore
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use file except in compliance with the License.
5// You may obtain a copy of the license at
6//
7//    http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package encoding
16
17import (
18	"golang.org/x/text/encoding"
19)
20
21// ASCII represents the 7-bit US-ASCII scheme.  It decodes directly to
22// UTF-8 without change, as all ASCII values are legal UTF-8.
23// Unicode values less than 128 (i.e. 7 bits) map 1:1 with ASCII.
24// It encodes runes outside of that to 0x1A, the ASCII substitution character.
25var ASCII encoding.Encoding
26
27func init() {
28	amap := make(map[byte]rune)
29	for i := 128; i <= 255; i++ {
30		amap[byte(i)] = RuneError
31	}
32
33	cm := &Charmap{Map: amap}
34	cm.Init()
35	ASCII = cm
36}
37