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 | |
20 | std::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 | |
50 | void PrintJSONString(const std::string& in) { |
51 | std::string out = EncodeJSONString(in); |
52 | fwrite(out.c_str(), 1, out.length(), stdout); |
53 | } |
54 | |