Merge pull request #11 from namazso/cpp-example

add a non-compiled c++ version of example 3

examples/example-03-cpp.cpp

@@ -0,0 +1,142 @@
+
+/*
+
+<https://github.com/rafagafe/tiny-json>
+     
+  Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+  SPDX-License-Identifier: MIT
+  Copyright (c) 2016-2018 Rafa Garcia <rafagarcia77@gmail.com>.
+
+  Permission is hereby  granted, free of charge, to any  person obtaining a copy
+  of this software and associated  documentation files (the "Software"), to deal
+  in the Software  without restriction, including without  limitation the rights
+  to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
+  copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
+  IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
+  FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
+  AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
+  LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+    
+*/
+
+/*
+ * In this example the JSON library is used to analyze an object that some
+ * properties are expected.
+ */
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <list>
+#include <string>
+#include "../tiny-json.h"
+
+class jsonParser : jsonPool_t
+{
+  static json_t* alloc_fn( jsonPool_t* pool )
+  {
+    const auto list_pool = (jsonParser*)pool;
+    list_pool->_list.emplace_back();
+    return &list_pool->_list.back();
+  }
+
+  std::list<json_t> _list{};
+  std::string _str{};
+  json_t const* _root{};
+
+public:
+  jsonParser() : jsonPool_t{ &alloc_fn, &alloc_fn } {}
+  jsonParser( const char* str )
+    : jsonPool_t{ &alloc_fn, &alloc_fn }
+    , _str{ str }
+  {
+    _root = json_createWithPool( _str.data(), this );
+  }
+  jsonParser( const jsonParser& ) = delete;
+  jsonParser( jsonParser&& ) = delete;
+  jsonParser& operator=( const jsonParser& ) = delete;
+  jsonParser& operator=( jsonParser&& ) = delete;
+
+  void parse( const char* str )
+  {
+    _str = str;
+    _list.clear();
+    _root = json_createWithPool( _str.data(), this );
+  }
+
+  json_t const* root() const { return _root; }
+};
+
+
+/* Parse a json string. */
+int main() {
+    const char* str = "{\n"
+        "\t\"firstName\": \"Bidhan\",\n"
+        "\t\"lastName\": \"Chatterjee\",\n"
+        "\t\"age\": 40,\n"
+        "\t\"address\": {\n"
+        "\t\t\"streetAddress\": \"144 J B Hazra Road\",\n"
+        "\t\t\"city\": \"Burdwan\",\n"
+        "\t\t\"state\": \"Paschimbanga\",\n"
+        "\t\t\"postalCode\": \"713102\"\n"
+        "\t},\n"
+        "\t\"phoneList\": [\n"
+        "\t\t{ \"type\": \"personal\", \"number\": \"09832209761\" },\n"
+        "\t\t{ \"type\": \"fax\", \"number\": \"91-342-2567692\" }\n"
+        "\t]\n"
+        "}\n";
+    puts( str );
+    jsonParser parser { str };
+    json_t const *json = parser.root();
+    if ( !json ) {
+        puts("Error json create.");
+        return EXIT_FAILURE;
+    }
+
+    json_t const* firstName = json_getProperty( json, "firstName" );
+    if ( !firstName || JSON_TEXT != json_getType( firstName ) ) {
+        puts("Error, the first name property is not found.");
+        return EXIT_FAILURE;
+    }
+    char const* firstNameVal = json_getValue( firstName );
+    printf( "Fist Name: %s.\n", firstNameVal );
+
+    char const* lastName = json_getPropertyValue( json, "lastName" );
+    if ( !lastName ) {
+        puts("Error, the last name property is not found.");
+        return EXIT_FAILURE;
+    }	
+    printf( "Last Name: %s.\n", lastName );
+
+    json_t const* age = json_getProperty( json, "age" );
+    if ( !age || JSON_INTEGER != json_getType( age ) ) {
+        puts("Error, the age property is not found.");
+        return EXIT_FAILURE;
+    }
+    int const ageVal = (int)json_getInteger( age );
+    printf( "Age: %d.\n", ageVal );
+
+    json_t const* phoneList = json_getProperty( json, "phoneList" );
+    if ( !phoneList || JSON_ARRAY != json_getType( phoneList ) ) {
+        puts("Error, the phone list property is not found.");
+        return EXIT_FAILURE;
+    }
+
+    json_t const* phone;
+    for( phone = json_getChild( phoneList ); phone != 0; phone = json_getSibling( phone ) ) {
+        if ( JSON_OBJ == json_getType( phone ) ) {
+            char const* phoneNumber = json_getPropertyValue( phone, "number" );
+            if ( phoneNumber ) printf( "Number: %s.\n", phoneNumber );
+        }
+    }
+
+    return EXIT_SUCCESS;
+}