GoldenCheetah/qtsolutions/json/mvjson.cpp

/*
 *
 *  Compact JSON format parsing lib (native cross-platform c++)
 *
 *  Copyright (C) 2013 Victor Laskin (victor.laskin@gmail.com)
 *  Details: http://vitiy.info/?p=102
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  3. The names of the authors may not be used to endorse or promote
 *    products derived from this software without specific prior
 *    written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
 *  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
 *  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 *  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 *  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 *  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include "mvjson.h"

MVJSONReader::MVJSONReader(const string & source) {
    root = parse(source);
}

MVJSONReader::~MVJSONReader() {
    if (root != NULL)
        delete root;
}

MVJSONNode::~MVJSONNode() {
    if (values.size() > 0)
        for (size_t i = 0; i < values.size(); i++)
            delete values.at(i);
}



MVJSONNode* MVJSONReader::parse(string text)
{
    string s = trim(text);
    if (s.length() < 2) return NULL;

    // object
    if ((s[0] == '{') && (s[s.length() - 1] == '}'))
    {
        // erase last and first symbols
        s.erase(0, 1);
        s.erase(s.length() - 1, 1);

        vector<string> parts;
        splitList(s, parts);

        MVJSONNode* node = new MVJSONNode();

        for (size_t i = 0; i < parts.size(); i++)
            node->values.push_back(parseValue(parts.at(i), false));

        return node;
    }

    return NULL;
}




MVJSONValue* MVJSONReader::parseValue(string text, bool hasNoName)
{
    string key;
    string s;
    splitInHalf(text, ":", key, s);
    key = trim(key);
    s = trim(s);
    if (key.length() > 2)
    {
        // strip "
        key.erase(0, 1);
        key.erase(key.length() - 1, 1);
    }

    if (hasNoName)
    {
        s = text;
        key = "";
    }


    if (s == "false") // bool
        return new MVJSONValue(key, false);

    if (s == "true")  // bool
        return new MVJSONValue(key, true);

    if (s == "null") // null
        return new MVJSONValue(key, MVJSON_TYPE_NULL);

    char first = s[0];

    if (first == '"') // string
        return new MVJSONValue(key, s.substr(1, s.length() - 2));

    if (first == '{') // object
        return new MVJSONValue(key, parse(s));

    if (first == '[') // array
    {
        s.erase(0, 1);
        s.erase(s.length() - 1, 1);
        vector<string> parts;
        splitList(s, parts);

        MVJSONValue* val = new MVJSONValue(key, MVJSON_TYPE_ARRAY);
        for (size_t i = 0; i < parts.size(); i++)
            val->arrayValue.push_back(parseValue(parts.at(i), true));
        return val;
    }

    // else its number!
    if (s.find(".") == string::npos)
        return new MVJSONValue(key, stringToInt(s));
    else
        return new MVJSONValue(key, stringToDouble(s));

    return NULL;
}

MVJSONValue::~MVJSONValue()
{
    if (objValue != NULL)
        delete objValue;
    if (arrayValue.size() > 0)
        for (size_t i = 0; i < arrayValue.size(); i++)
            delete arrayValue.at(i);
}

void MVJSONValue::init(MVJSON_TYPE valueType)
{
    this->valueType = valueType;
    objValue = NULL;
    name = "";
}

MVJSONValue::MVJSONValue(string name, MVJSON_TYPE valueType)
{
    init(valueType);
    this->name = name;
}

MVJSONValue::MVJSONValue(string name, bool value)
{
    init(MVJSON_TYPE_BOOL);
    this->name = name;
    boolValue = value;
}

MVJSONValue::MVJSONValue(string name, string value)
{
    init(MVJSON_TYPE_STRING);
    this->name = name;

    stringValue = value;

    // here we switch back special chars
    //  \"  \\  \/  \b  \f  \n  \r  \t  \u four-hex-digits
    //replace(stringValue, "\\\"", "\"");
    //replace(stringValue, "\\\\", "\\");
    //replace(stringValue, "\\/", "/");
    //replace(stringValue, "\\b", "\b");
    //replace(stringValue, "\\f", "\f");
    //replace(stringValue, "\\n", "\n");
    //replace(stringValue, "\\r", "\r");
    //replace(stringValue, "\\t", "\t");

    // TODO - \u four-hex-digits
    // SS::replace(stringValue, "\\\\", "\\");

}

MVJSONValue::MVJSONValue(string name, int value)
{
    init(MVJSON_TYPE_INT);
    this->name = name;
    intValue = value;
}

MVJSONValue::MVJSONValue(string name, double value)
{
    init(MVJSON_TYPE_DOUBLE);
    this->name = name;
    doubleValue = value;
}

MVJSONValue::MVJSONValue(string name, MVJSONNode* value)
{
    init(MVJSON_TYPE_OBJECT);
    this->name = name;
    objValue = value;
}

bool MVJSONNode::hasField(string name)
{
    if (values.size() == 0) return false;
    for (size_t i = 0; i < values.size(); i++)
        if (values.at(i)->name == name)
            return true;
    return false;
}

MVJSONValue* MVJSONNode::getField(string name)
{
    if (values.size() == 0) return NULL;
    for (size_t i = 0; i < values.size(); i++)
        if (values.at(i)->name == name)
            return values.at(i);
    return NULL;
}


double MVJSONNode::getFieldDouble(string name)
{
    MVJSONValue* value = getField(name);
    if (value == NULL) return 0;
    if (value->valueType == MVJSON_TYPE_INT) return value->intValue;
    if (value->valueType == MVJSON_TYPE_DOUBLE) return value->doubleValue;
    return 0;
}

int MVJSONNode::getFieldInt(string name)
{
    MVJSONValue* value = getField(name);
    if (value == NULL) return 0;
    if (value->valueType == MVJSON_TYPE_INT) return value->intValue;
    return 0;
}

string MVJSONNode::getFieldString(string name)
{
    MVJSONValue* value = getField(name);
    if (value == NULL) return "";
    if (value->valueType == MVJSON_TYPE_STRING) return value->stringValue;
    return "";
}

bool MVJSONNode::getFieldBool(string name)
{
    MVJSONValue* value = getField(name);
    if (value == NULL) return false;
    if (value->valueType == MVJSON_TYPE_INT) return (bool)value->intValue;
    if (value->valueType == MVJSON_TYPE_BOOL) return value->boolValue;
    return false;
}

double MVJSONValue::getFieldDouble(string name)
{
    if (objValue == NULL) return 0;
    return objValue->getFieldDouble(name);
}

int MVJSONValue::getFieldInt(string name)
{
    if (objValue == NULL) return 0;
    return objValue->getFieldInt(name);
}

string MVJSONValue::getFieldString(string name)
{
    if (objValue == NULL) return "";
    return objValue->getFieldString(name);
}

bool MVJSONValue::getFieldBool(string name)
{
    if (objValue == NULL) return false;
    return objValue->getFieldBool(name);
}