/
string.go
61 lines (58 loc) · 1.36 KB
/
string.go
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/*
* Cadence - The resource-oriented smart contract programming language
*
* Copyright Dapper Labs, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this 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 ast
import (
"strconv"
"strings"
"unicode/utf8"
)
func QuoteString(s string) string {
var b strings.Builder
b.WriteByte('"')
for _, r := range s {
switch r {
case 0:
b.WriteString(`\0`)
case '\n':
b.WriteString(`\n`)
case '\r':
b.WriteString(`\r`)
case '\t':
b.WriteString(`\t`)
case '\\':
b.WriteString(`\\`)
case '"':
b.WriteString(`\"`)
default:
switch {
case 0x20 <= r && r <= 0x7E:
// ASCII printable from space through DEL-1.
b.WriteRune(r)
case r > utf8.MaxRune:
r = 0xFFFD
fallthrough
default:
b.WriteString(`\u{`)
b.WriteString(strconv.FormatInt(int64(r), 16))
b.WriteByte('}')
}
}
}
b.WriteByte('"')
return b.String()
}