code_scanner/common/json/json.cpp

#include "json.h"
#include "cJSON.h"
#include <stdlib.h>
#include <string.h>

namespace special_char_trans
{
	struct
	{
		const char* writedown_text;
		char		readable_char;
	}transferred_chars[] = { { "\\\"", '\"' }
		, { "\\'", '\'' }
		, { "\\a", '\a' }
		, { "\\b", '\b' }
		, { "\\f", '\f' }
		, { "\\n", '\n' }
		, { "\\r", '\r' }
		, { "\\t", '\t' }
		, { "\\v", '\v' }
		//	, { "\\?", '\?' }
			, { "\\\\", '\\' }
			, { "\\/", '/' }
		//	, { "\\0", '\0' }
	};

	void to_writedown(std::string& str)
	{
		std::string	trans(str);
		const char* ptr = trans.c_str();

		str.clear();
		while (*ptr)
		{
			bool rep = false;
			if (*ptr == '\\')
			{
				if (ptr[1] == '\\')
				{
					str += "\\\\";
					ptr++;
					rep = true;
				}
				else if( ptr[1] == '/' ||
					ptr[1] == 'a' ||
					ptr[1] == 'b' ||
					ptr[1] == 'f' ||
					ptr[1] == 'n' ||
					ptr[1] == 'r' ||
					ptr[1] == 't' ||
					ptr[1] == 'u' ||
					ptr[1] == 'v')
				{
					str += "\\";
					ptr++;
				}
				else
				{
					str += "\\\\";
					rep = true;
				}
			}
			else
			{
				for (size_t i = 0; i < sizeof(transferred_chars) / sizeof(transferred_chars[0]); ++i)
				{
					if (*ptr == transferred_chars[i].readable_char)
					{
						str += transferred_chars[i].writedown_text;
						rep = true;
						break;
					}
				}
			}
			if (!rep)
				str.append(1, *ptr);
			ptr++;
		}
	}
}


json::json(char* json_txt) : type_(VAL_TYPE_OBJECT), key_(""), strval_(""), cur_child_(-1)
{
	simple_val_.dval = .0f;
	if(json_txt)
		attach_text(json_txt);
}
json::json(const char* key, bool val) : type_(VAL_TYPE_BOOL), key_(key ? key : ""), strval_(""), cur_child_(-1)
{
	simple_val_.bval = val;
}
json::json(const char* key, int val) : type_(VAL_TYPE_INT), key_(key ? key : ""), strval_(""), cur_child_(-1)
{
	simple_val_.nval = val;
}
json::json(const char* key, double val) : type_(VAL_TYPE_FLOAT), key_(key ? key : ""), strval_(""), cur_child_(-1)
{
	simple_val_.dval = val;
}
json::json(const char* key, const char* val) : type_(VAL_TYPE_STRING), key_(key ? key : ""), strval_(val ? val : ""), cur_child_(-1)
{}
json::~json()
{
	clear();
}

std::string json::object_key(json* jsn)
{
	return "\"" + jsn->key() + "\":";
}
std::string json::array_key(json* jsn)
{
	return "";
}

void json::from_cjson(cJSON* cj)
{
	key_ = cj && cj->string ? cj->string : "";
	while (cj)
	{
		json* child = nullptr;
		if (cj->type == cJSON_True)
		{
			child = new json(cj->string, true);
		}
		else if(cj->type == cJSON_False)
		{
			child = new json(cj->string, false);
		}
		else if (cj->type == cJSON_Number)
		{
			if (cj->valuedouble - (int)cj->valuedouble < .00001)
			{
				child = new json(cj->string, cj->valueint);
			}
			else
			{
				child = new json(cj->string, cj->valuedouble);
			}
		}
		else if (cj->type == cJSON_String)
		{
			child = new json(cj->string, cj->valuestring);
		}
		else if (cj->type == cJSON_Object || cj->type == cJSON_Array)
		{
			child = new json();
			child->from_cjson(cj->child);
			child->key_ = cj->string ? cj->string : "";
		}
		arr_val_.push_back(child);
		cj = cj->next;
	}

	if (arr_val_.size() == 1 && arr_val_[0]->arr_val_.size() == 0)
	{
		json* child = arr_val_[0];

		if (!child->key_.empty())	// array
		{
			arr_val_.clear();
			type_ = child->type_;
			key_ = child->key_;
			simple_val_.dval = child->simple_val_.dval;
			strval_ = child->strval_;
			for (auto& v : child->arr_val_)
				arr_val_.push_back(v);
			child->arr_val_.clear();
			child->release();
		}
	}
	
	if (arr_val_.size())
	{
		type_ = arr_val_[0]->key().empty() ? VAL_TYPE_ARRAY : VAL_TYPE_OBJECT;
	}
}
json* json::find_child(const char* key, bool remove)
{
	json* ret = nullptr;

	if (type_ == VAL_TYPE_OBJECT)
	{
		for (size_t i = 0; i < arr_val_.size(); ++i)
		{
			if (arr_val_[i]->key() == key)
			{
				ret = arr_val_[i];
				if (remove)
					arr_val_.erase(arr_val_.begin() + i);
				else
					ret->add_ref();

				break;
			}
		}
	}

	return ret;
}

bool json::attach_text(char* json_txt)
{
	clear();
	
	cJSON* jsn = cJSON_Parse(json_txt);
	if (jsn)
	{
		char	*text = cJSON_Print(jsn);
		if (text)
			free(text);

		from_cjson(jsn->child);
		cJSON_Delete(jsn);

		return true;
	}

	return false;
}
void json::clear(bool as_array)
{
	if (type_ == VAL_TYPE_ARRAY || type_ == VAL_TYPE_OBJECT)
	{
		for (auto& v : arr_val_)
			v->release();
	}
	type_ = as_array ? VAL_TYPE_ARRAY : VAL_TYPE_OBJECT;
	simple_val_.dval = .0f;
	key_ = "";
	strval_ = "";
	arr_val_.clear();
	cur_child_ = -1;
}
std::string json::to_string(void)
{
	if (type_ == VAL_TYPE_NULL)
		return "";
	if (type_ == VAL_TYPE_BOOL)
		return (simple_val_.bval ? "true" : "false");
	if (type_ == VAL_TYPE_INT)
		return std::to_string(simple_val_.nval);
	if (type_ == VAL_TYPE_FLOAT)
		return std::to_string(simple_val_.dval);
	if (type_ == VAL_TYPE_STRING)
	{
		char* u = cJSON_utf8_2_unic(strval_.c_str());
		std::string	r(u);

		free(u);
		special_char_trans::to_writedown(r);

		return "\"" + r + "\"";
	}

	std::string(*k)(json*) = type_ == VAL_TYPE_OBJECT ? json::object_key : json::array_key;
	std::string str(type_ == VAL_TYPE_OBJECT ? "{" : "[");

	if (arr_val_.size())
	{
		str += k(arr_val_[0]) + arr_val_[0]->to_string();
		for(size_t i = 1; i < arr_val_.size(); ++i)
			str += "," + k(arr_val_[i]) + arr_val_[i]->to_string();
	}
	str += type_ == VAL_TYPE_OBJECT ? "}" : "]";

	return str;
}

std::string& json::key(void)
{
	return key_;
}
bool json::is_array(void)
{
	return type_ == VAL_TYPE_ARRAY;
}
bool json::is_leaf_node(void)
{
	return	type_ == VAL_TYPE_BOOL ||
			type_ == VAL_TYPE_INT ||
			type_ == VAL_TYPE_FLOAT ||
			type_ == VAL_TYPE_STRING;
}

bool json::get_value(const char* key, bool& val)
{
	bool	ret = false;
	json* child = find_child(key);

	if (child)
	{
		if (child->type_ == VAL_TYPE_BOOL)
		{
			val = child->simple_val_.bval;
			ret = true;
		}
		child->release();
	}
	else if (type_ == VAL_TYPE_BOOL && key_ == key)
	{
		val = simple_val_.bval;
		ret = true;
	}

	return ret;
}
bool json::get_value(const char* key, int& val)
{
	bool	ret = false;
	json* child = find_child(key);

	if (child)
	{
		if (child->type_ == VAL_TYPE_INT)
		{
			val = child->simple_val_.nval;
			ret = true;
		}
		child->release();
	}
	else if (type_ == VAL_TYPE_INT && key_ == key)
	{
		val = simple_val_.nval;
		ret = true;
	}

	return ret;
}
bool json::get_value(const char* key, double& val)
{
	bool	ret = false;
	json* child = find_child(key);

	if (child)
	{
		if (child->type_ == VAL_TYPE_FLOAT)
		{
			val = child->simple_val_.dval;
			ret = true;
		}
		child->release();
	}
	else if (type_ == VAL_TYPE_FLOAT && key_ == key)
	{
		val = simple_val_.dval;
		ret = true;
	}

	return ret;
}
bool json::get_value(const char* key, std::string& val)
{
	bool	ret = false;
	json* child = find_child(key);

	if (child)
	{
		if (child->type_ == VAL_TYPE_STRING)
		{
			val = child->strval_;
			ret = true;
		}
		child->release();
	}
	else if (type_ == VAL_TYPE_STRING && key_ == key)
	{
		val = strval_;
		ret = true;
	}

	return ret;
}
bool json::get_value(const char* key, json*& val)
{
	bool	ret = false;
	json	*child = find_child(key);

	if (child)
	{
		if (child->type_ == VAL_TYPE_OBJECT)
		{
			val = child;
			ret = true;
		}
		else
		{
			child->release();
		}
	}

	return ret;
}

size_t json::children(void)
{
	if (type_ == VAL_TYPE_ARRAY || type_ == VAL_TYPE_OBJECT)
		return arr_val_.size();
	else
		return -1;
}
json* json::child(size_t ind)
{
	if (type_ == VAL_TYPE_ARRAY || type_ == VAL_TYPE_OBJECT)
	{
		if (ind >= 0 && ind < arr_val_.size())
		{
			arr_val_[ind]->add_ref();

			return arr_val_[ind];
		}
	}

	return nullptr;
}
json* json::first_child(void)
{
	if (type_ == VAL_TYPE_OBJECT || type_ == VAL_TYPE_ARRAY)
	{
		cur_child_ = 0;
		if (arr_val_.size())
		{
			arr_val_[0]->add_ref();

			return arr_val_[0];
		}
	}

	return nullptr;
}
json* json::next_child(void)
{
	if (type_ == VAL_TYPE_OBJECT || type_ == VAL_TYPE_ARRAY)
	{		
		if (++cur_child_ < arr_val_.size())
		{
			arr_val_[cur_child_]->add_ref();

			return arr_val_[cur_child_];
		}
	}

	return nullptr;
}

bool json::set_value(const char* key, bool val)
{
	if (type_ != VAL_TYPE_OBJECT)
		return false;

	json* child = find_child(key);

	if (child)
	{
		child->clear();
		child->type_ = VAL_TYPE_BOOL;
		child->key() = key ? key : "";
		child->simple_val_.bval = val;
		child->release();
	}
	else
	{
		child = new json(key, val);
		arr_val_.push_back(child);
	}

	return true;
}
bool json::set_value(const char* key, int val)
{
	if (type_ != VAL_TYPE_OBJECT)
		return false;

	json* child = find_child(key);

	if (child)
	{
		child->clear();
		child->type_ = VAL_TYPE_INT;
		child->key() = key ? key : "";
		child->simple_val_.nval = val;
		child->release();
	}
	else
	{
		child = new json(key, val);
		arr_val_.push_back(child);
	}

	return true;
}
bool json::set_value(const char* key, double val)
{
	if (type_ != VAL_TYPE_OBJECT)
		return false;

	json* child = find_child(key);

	if (child)
	{
		child->clear();
		child->type_ = VAL_TYPE_FLOAT;
		child->key() = key ? key : "";
		child->simple_val_.dval = val;
		child->release();
	}
	else
	{
		child = new json(key, val);
		arr_val_.push_back(child);
	}

	return true;
}
bool json::set_value(const char* key, const char* val)
{
	if (type_ != VAL_TYPE_OBJECT)
		return false;

	json* child = find_child(key);

	if (child)
	{
		child->clear();
		child->type_ = VAL_TYPE_STRING;
		child->key() = key ? key : "";
		child->strval_ = val ? val : "";
		child->release();
	}
	else
	{
		child = new json(key, val);
		arr_val_.push_back(child);
	}

	return true;
}
bool json::set_value(const char* key, json* val)
{
	if (type_ != VAL_TYPE_OBJECT)
		return false;

	for (size_t i = 0; i < arr_val_.size(); ++i)
	{
		if (arr_val_[i]->key() == key)
		{
			arr_val_[i]->release();
			arr_val_[i] = val;
			val->add_ref();
			return true;
		}
	}

	arr_val_.push_back(val);
	val->key() = key;
	val->add_ref();

	return true;
}

json& json::operator+=(bool val)
{
	if (type_ == VAL_TYPE_ARRAY)
	{
		json* child = new json(nullptr, val);
		arr_val_.push_back(child);
	}

	return *this;
}
json& json::operator+=(int val)
{
	if (type_ == VAL_TYPE_ARRAY)
	{
		json* child = new json(nullptr, val);
		arr_val_.push_back(child);
	}

	return *this;
}
json& json::operator+=(double val)
{
	if (type_ == VAL_TYPE_ARRAY)
	{
		json* child = new json(nullptr, val);
		arr_val_.push_back(child);
	}

	return *this;
}
json& json::operator+=(const char* val)
{
	if (type_ == VAL_TYPE_ARRAY)
	{
		json* child = new json(nullptr, val);
		arr_val_.push_back(child);
	}

	return *this;
}
json& json::operator+=(json* val)
{
	if (type_ == VAL_TYPE_ARRAY)
	{
		val->add_ref();
		arr_val_.push_back(val);
	}

	return *this;
}

json& json::operator-=(int ind)
{
	remove(ind);

	return *this;
}
bool json::remove(const char* key)
{
	json* child = find_child(key, true);

	if (child)
	{
		child->release();
		return true;
	}
	else
	{
		return false;
	}
}
bool json::remove(json* child)
{
	if (type_ == VAL_TYPE_ARRAY || type_ == VAL_TYPE_OBJECT)
	{
		for (size_t i = 0; i < arr_val_.size(); ++i)
		{
			if (arr_val_[i] == child)
			{
				arr_val_[i]->release();
				arr_val_.erase(arr_val_.begin() + i);

				return true;
			}
		}
	}

	return false;
}
bool json::remove(int ind)
{
	bool ret = false;

	if (type_ == VAL_TYPE_ARRAY || type_ == VAL_TYPE_OBJECT)
	{
		if (ind >= 0 && ind < arr_val_.size())
		{
			arr_val_[ind]->release();
			arr_val_.erase(arr_val_.begin() + ind);
			ret = true;
		}
	}

	return ret;
}

int json::index(json* child)
{
	if (type_ == VAL_TYPE_ARRAY || type_ == VAL_TYPE_OBJECT)
	{
		for (int i = 0; i < arr_val_.size(); ++i)
		{
			if (arr_val_[i] == child)
				return i;
		}
	}

	return -1;
}
int json::index_move_to(json* child, int ind)
{
	int	i = index(child);

	if (i == -1)
		return -1;

	arr_val_.erase(arr_val_.begin() + i);
	if (ind < 0)
		ind = 0;
	if (ind > arr_val_.size())
		ind = arr_val_.size();
	arr_val_.insert(arr_val_.begin() + ind, child);

	return ind;
}

bool json::value(bool& val)
{
	bool ret = false;

	if (is_leaf_node() && type_ == VAL_TYPE_BOOL)
	{
		val = simple_val_.bval;
		ret = true;
	}

	return ret;
}
bool json::value(int& val)
{
	bool ret = false;

	if (is_leaf_node() && type_ == VAL_TYPE_INT)
	{
		val = simple_val_.nval;
		ret = true;
	}

	return ret;
}
bool json::value(double& val)
{
	bool ret = false;

	if (is_leaf_node() && type_ == VAL_TYPE_FLOAT)
	{
		val = simple_val_.dval;
		ret = true;
	}

	return ret;
}
bool json::value(std::string& val)
{
	bool ret = false;

	if (is_leaf_node() && type_ == VAL_TYPE_STRING)
	{
		val = strval_;
		ret = true;
	}

	return ret;
}
json& json::operator=(bool val)
{
	if (is_leaf_node())
	{
		simple_val_.bval = val;
		type_ = VAL_TYPE_BOOL;
	}

	return *this;
}
json& json::operator=(int val)
{
	if (is_leaf_node())
	{
		simple_val_.nval = val;
		type_ = VAL_TYPE_INT;
	}

	return *this;
}
json& json::operator=(double val)
{
	if (is_leaf_node())
	{
		simple_val_.dval = val;
		type_ = VAL_TYPE_FLOAT;
	}

	return *this;
}
json& json::operator=(const char* val)
{
	if (is_leaf_node())
	{
		strval_ = val ? val : "";
		type_ = VAL_TYPE_STRING;
	}

	return *this;
}