Mercurial > code
view C++/modules/Json/Json.cpp @ 475:b681299e6987
Json: removal of json::Object, json::Array, json::Document
author | David Demelier <markand@malikania.fr> |
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date | Mon, 09 Nov 2015 16:52:38 +0100 |
parents | 902b034df6e3 |
children | c7825b8c6145 |
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/* * Json.cpp -- C++14 JSON manipulation using jansson parser * * Copyright (c) 2013-2015 David Demelier <markand@malikania.fr> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "Json.h" #include <jansson.h> namespace json { namespace { void readObject(Value &parent, json_t *object); void readArray(Value &parent, json_t *array); Value readValue(json_t *v) { if (json_is_null(v)) { return Value{nullptr}; } if (json_is_string(v)) { return Value{json_string_value(v)}; } if (json_is_real(v)) { return Value{json_number_value(v)}; } if (json_is_integer(v)) { return Value{static_cast<int>(json_integer_value(v))}; } if (json_is_boolean(v)) { return Value{json_boolean_value(v)}; } if (json_is_object(v)) { Value object{Type::Object}; readObject(object, v); return object; } if (json_is_array(v)) { Value array{Type::Array}; readArray(array, v); return array; } return Value{}; } void readObject(Value &parent, json_t *object) { const char *key; json_t *value; json_object_foreach(object, key, value) { parent.insert(key, readValue(value)); } } void readArray(Value &parent, json_t *array) { size_t index; json_t *value; json_array_foreach(array, index, value) { parent.append(readValue(value)); } } template <typename Func, typename... Args> Value convert(Func fn, Args&&... args) { json_error_t error; json_t *json = fn(std::forward<Args>(args)..., &error); if (json == nullptr) { throw Error{error.text, error.source, error.line, error.column, error.position}; } Value value; if (json_is_object(json)) { value = Value{Type::Object}; readObject(value, json); } else { value = Value{Type::Array}; readArray(value, json); } json_decref(json); return value; } } // !namespace void Value::copy(const Value &other) { switch (other.m_type) { case Type::String: new (&m_string) std::string(); m_string = std::move(other.m_string); break; case Type::Real: m_number = other.m_number; break; case Type::Int: m_integer = other.m_integer; break; case Type::Boolean: m_boolean = other.m_boolean; break; case Type::Object: new (&m_object) std::map<std::string, Value>(); m_object = std::move(other.m_object); break; case Type::Array: new (&m_array) std::deque<Value>(); m_array = std::move(other.m_array); break; default: break; } m_type = other.m_type; } void Value::move(Value &&other) { switch (other.m_type) { case Type::String: new (&m_string) std::string(std::move(other.m_string)); break; case Type::Real: m_number = other.m_number; break; case Type::Int: m_integer = other.m_integer; break; case Type::Boolean: m_boolean = other.m_boolean; break; case Type::Object: new (&m_object) std::map<std::string, Value>(std::move(other.m_object)); break; case Type::Array: new (&m_array) std::deque<Value>(std::move(other.m_array)); break; default: break; } m_type = other.m_type; } Value::Value(Type type) : m_type{type} { switch (type) { case Type::String: new (&m_string) std::string(); break; case Type::Array: new (&m_array) std::deque<Value>(); break; case Type::Object: new (&m_object) std::map<std::string, Value>(); break; case Type::Real: m_number = 0; break; case Type::Int: m_integer = 0; break; case Type::Boolean: m_boolean = false; break; default: break; } } Value::~Value() { switch (m_type) { case Type::String: m_string.~basic_string(); break; case Type::Object: m_object.~map<std::string, Value>(); break; case Type::Array: m_array.~deque<Value>(); break; default: break; } } bool Value::toBool() const noexcept { if (m_type != Type::Boolean) { return false; } return m_boolean; } double Value::toReal() const noexcept { if (m_type != Type::Real) { return 0; } return m_number; } int Value::toInt() const noexcept { if (m_type != Type::Int) { return 0; } return m_integer; } std::string Value::toString() const noexcept { if (m_type != Type::String) { return ""; } return m_string; } Value::Value(const Buffer &buffer) { *this = convert(json_loads, buffer.text.c_str(), 0); } Value::Value(const File &file) { *this = convert(json_load_file, file.path.c_str(), 0); } std::string escape(const std::string &value) { std::string result; for (auto it = value.begin(); it != value.end(); ++it) { switch (*it) { case '\\': result += "\\\\"; break; case '/': result += "\\/"; break; case '"': result += "\\\""; break; case '\b': result += "\\b"; break; case '\f': result += "\\f"; break; case '\n': result += "\\n"; break; case '\r': result += "\\r"; break; case '\t': result += "\\t"; break; default: result += *it; break; } } return result; } } // !json