JSON.h

/*
 * File JSON.h part of the SimpleJSON Library - http://mjpa.in/json
 *
 * Copyright (C) 2010 Mike Anchor
 *
 * 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.
 */
 
#ifndef _JSON_H_
#define _JSON_H_
 
#include <AtomsUtils/Globals.h>
 
#include <float.h>
 
#include <vector>
#include <string>
#include <map>
 
// Linux compile fix - from quaker66
#ifdef __GNUC__
    #include <cstring>
    #include <cstdlib>
#endif
 
namespace AtomsUtils
{
 
    // Mac compile fixes - from quaker66, Lion fix by dabrahams
#if defined(__APPLE__) && __DARWIN_C_LEVEL < 200809L || (defined(WIN32) && defined(__GNUC__)) || defined(ANDROID)
#include <wctype.h>
#include <wchar.h>
 
    static inline int wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
    {
        int lc1 = 0;
        int lc2 = 0;
 
        while (n--)
        {
            lc1 = towlower(*s1);
            lc2 = towlower(*s2);
 
            if (lc1 != lc2)
                return (lc1 - lc2);
 
            if (!lc1)
                return 0;
 
            ++s1;
            ++s2;
        }
 
        return 0;
    }
#endif
 
    // Simple function to check a string 's' has at least 'n' characters
    static inline bool simplejson_wcsnlen(const wchar_t *s, size_t n) {
        if (s == 0)
            return false;
 
        const wchar_t *save = s;
        while (n-- > 0)
        {
            if (*(save++) == 0) return false;
        }
 
        return true;
    }
 
    class ATOMSUTILS_EXPORT JSON;
    class ATOMSUTILS_EXPORT JSONValue;
    typedef std::vector<JSONValue*> JSONArray;
    typedef std::map<std::wstring, JSONValue*> JSONObject;
 
    // Custom types
    enum JSONType { JSONType_Null, JSONType_String, JSONType_Bool, JSONType_Number, JSONType_Array, JSONType_Object };
 
    class ATOMSUTILS_EXPORT JSONValue
    {
        friend class JSON;
 
    public:
        JSONValue(/*NULL*/);
        JSONValue(const wchar_t *m_char_value);
        JSONValue(const std::wstring &m_string_value);
        JSONValue(bool m_bool_value);
        JSONValue(double m_number_value);
        JSONValue(const JSONArray &m_array_value);
        JSONValue(const JSONObject &m_object_value);
        JSONValue(const JSONValue &m_source);
        ~JSONValue();
 
        bool IsNull() const;
        bool IsString() const;
        bool IsBool() const;
        bool IsNumber() const;
        bool IsArray() const;
        bool IsObject() const;
 
        const std::wstring &AsString() const;
        bool AsBool() const;
        double AsNumber() const;
        const JSONArray &AsArray() const;
        const JSONObject &AsObject() const;
 
        std::size_t CountChildren() const;
        bool HasChild(std::size_t index) const;
        JSONValue *Child(std::size_t index);
        bool HasChild(const wchar_t* name) const;
        JSONValue *Child(const wchar_t* name);
        std::vector<std::wstring> ObjectKeys() const;
 
        std::wstring Stringify(bool const prettyprint = false) const;
    protected:
        static JSONValue *Parse(const wchar_t **data);
 
    private:
        static std::wstring StringifyString(const std::wstring &str);
        std::wstring StringifyImpl(size_t const indentDepth) const;
        static std::wstring Indent(size_t depth);
 
        JSONType type;
 
        union
        {
            bool bool_value;
            double number_value;
            std::wstring *string_value;
            JSONArray *array_value;
            JSONObject *object_value;
        };
 
    };
 
    class ATOMSUTILS_EXPORT JSON
    {
        friend class JSONValue;
 
    public:
        static JSONValue* Parse(const char *data);
        static JSONValue* Parse(const wchar_t *data);
        static std::wstring Stringify(const JSONValue *value);
    protected:
        static bool SkipWhitespace(const wchar_t **data);
        static bool ExtractString(const wchar_t **data, std::wstring &str);
        static double ParseInt(const wchar_t **data);
        static double ParseDecimal(const wchar_t **data);
    private:
        JSON();
    };
 
}
 
#endif