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