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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef TALK_BASE_JSON_H_
     29 #define TALK_BASE_JSON_H_
     30 
     31 #include <string>
     32 #include <vector>
     33 
     34 #ifdef JSONCPP_RELATIVE_PATH
     35 #include "json/json.h"
     36 #else
     37 #include "third_party/jsoncpp/json.h"
     38 #endif
     39 
     40 // TODO: Move to talk_base namespace
     41 
     42 ///////////////////////////////////////////////////////////////////////////////
     43 // JSON Helpers
     44 ///////////////////////////////////////////////////////////////////////////////
     45 
     46 // Robust conversion operators, better than the ones in JsonCpp.
     47 bool GetIntFromJson(const Json::Value& in, int* out);
     48 bool GetUIntFromJson(const Json::Value& in, unsigned int* out);
     49 bool GetStringFromJson(const Json::Value& in, std::string* out);
     50 bool GetBoolFromJson(const Json::Value& in, bool* out);
     51 bool GetDoubleFromJson(const Json::Value& in, double* out);
     52 
     53 // Pull values out of a JSON array.
     54 bool GetValueFromJsonArray(const Json::Value& in, size_t n,
     55                            Json::Value* out);
     56 bool GetIntFromJsonArray(const Json::Value& in, size_t n,
     57                          int* out);
     58 bool GetUIntFromJsonArray(const Json::Value& in, size_t n,
     59                           unsigned int* out);
     60 bool GetStringFromJsonArray(const Json::Value& in, size_t n,
     61                             std::string* out);
     62 bool GetBoolFromJsonArray(const Json::Value& in, size_t n,
     63                           bool* out);
     64 bool GetDoubleFromJsonArray(const Json::Value& in, size_t n,
     65                             double* out);
     66 
     67 // Convert json arrays to std::vector
     68 bool JsonArrayToValueVector(const Json::Value& in,
     69                             std::vector<Json::Value>* out);
     70 bool JsonArrayToIntVector(const Json::Value& in,
     71                           std::vector<int>* out);
     72 bool JsonArrayToUIntVector(const Json::Value& in,
     73                            std::vector<unsigned int>* out);
     74 bool JsonArrayToStringVector(const Json::Value& in,
     75                              std::vector<std::string>* out);
     76 bool JsonArrayToBoolVector(const Json::Value& in,
     77                            std::vector<bool>* out);
     78 bool JsonArrayToDoubleVector(const Json::Value& in,
     79                              std::vector<double>* out);
     80 
     81 // Convert std::vector to json array
     82 Json::Value ValueVectorToJsonArray(const std::vector<Json::Value>& in);
     83 Json::Value IntVectorToJsonArray(const std::vector<int>& in);
     84 Json::Value UIntVectorToJsonArray(const std::vector<unsigned int>& in);
     85 Json::Value StringVectorToJsonArray(const std::vector<std::string>& in);
     86 Json::Value BoolVectorToJsonArray(const std::vector<bool>& in);
     87 Json::Value DoubleVectorToJsonArray(const std::vector<double>& in);
     88 
     89 // Pull values out of a JSON object.
     90 bool GetValueFromJsonObject(const Json::Value& in, const std::string& k,
     91                             Json::Value* out);
     92 bool GetIntFromJsonObject(const Json::Value& in, const std::string& k,
     93                           int* out);
     94 bool GetUIntFromJsonObject(const Json::Value& in, const std::string& k,
     95                            unsigned int* out);
     96 bool GetStringFromJsonObject(const Json::Value& in, const std::string& k,
     97                              std::string* out);
     98 bool GetBoolFromJsonObject(const Json::Value& in, const std::string& k,
     99                            bool* out);
    100 bool GetDoubleFromJsonObject(const Json::Value& in, const std::string& k,
    101                              double* out);
    102 
    103 // Writes out a Json value as a string.
    104 std::string JsonValueToString(const Json::Value& json);
    105 
    106 #endif  // TALK_BASE_JSON_H_
    107