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// +build !windows,!nacl,!plan9
// Copyright 2016 The TCell Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use file except in compliance with the License.
// You may obtain a copy of the license at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tcell
import (
"os"
"strings"
)
func getCharset() string {
// Determine the character set. This can help us later.
// Per POSIX, we search for LC_ALL first, then LC_CTYPE, and
// finally LANG. First one set wins.
locale := ""
if locale = os.Getenv("LC_ALL"); locale == "" {
if locale = os.Getenv("LC_CTYPE"); locale == "" {
locale = os.Getenv("LANG")
}
}
if locale == "POSIX" || locale == "C" {
return "US-ASCII"
}
if i := strings.IndexRune(locale, '@'); i >= 0 {
locale = locale[:i]
}
if i := strings.IndexRune(locale, '.'); i >= 0 {
locale = locale[i+1:]
} else {
// Default assumption, and on Linux we can see LC_ALL
// without a character set, which we assume implies UTF-8.
return "UTF-8"
}
// XXX: add support for aliases
return locale
}
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