1// Copyright 2021 Google Inc. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this 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
15#include "json.h"
16
17#include <cstdio>
18#include <string>
19
20std::string EncodeJSONString(const std::string& in) {
21 static const char* hex_digits = "0123456789abcdef";
22 std::string out;
23 out.reserve(in.length() * 1.2);
24 for (std::string::const_iterator it = in.begin(); it != in.end(); ++it) {
25 char c = *it;
26 if (c == '\b')
27 out += "\\b";
28 else if (c == '\f')
29 out += "\\f";
30 else if (c == '\n')
31 out += "\\n";
32 else if (c == '\r')
33 out += "\\r";
34 else if (c == '\t')
35 out += "\\t";
36 else if (0x0 <= c && c < 0x20) {
37 out += "\\u00";
38 out += hex_digits[c >> 4];
39 out += hex_digits[c & 0xf];
40 } else if (c == '\\')
41 out += "\\\\";
42 else if (c == '\"')
43 out += "\\\"";
44 else
45 out += c;
46 }
47 return out;
48}
49
50void PrintJSONString(const std::string& in) {
51 std::string out = EncodeJSONString(in);
52 fwrite(out.c_str(), 1, out.length(), stdout);
53}
54