diff options
Diffstat (limited to 'src/shared/json/json.h')
| -rw-r--r-- | src/shared/json/json.h | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/src/shared/json/json.h b/src/shared/json/json.h new file mode 100644 index 00000000000..7bc945cd3e9 --- /dev/null +++ b/src/shared/json/json.h @@ -0,0 +1,582 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef JSONVALUE_H +#define JSONVALUE_H + +#include <initializer_list> +#include <string> +#include <vector> + +namespace Json { + +class JsonArray; +class JsonObject; + +namespace Internal { +class Data; +class Base; +class Object; +class Header; +class Array; +class Value; +class Entry; +class SharedString; +class Parser; +} + +class JsonValue +{ +public: + enum Type { + Null = 0x0, + Bool = 0x1, + Double = 0x2, + String = 0x3, + Array = 0x4, + Object = 0x5, + Undefined = 0x80 + }; + + JsonValue(Type = Null); + JsonValue(bool b); + JsonValue(double n); + JsonValue(int n); + JsonValue(int64_t n); + JsonValue(const std::string &s); + JsonValue(const char *s); + JsonValue(const JsonArray &a); + JsonValue(const JsonObject &o); + + ~JsonValue(); + + JsonValue(const JsonValue &other); + JsonValue &operator =(const JsonValue &other); + + Type type() const { return t; } + bool isNull() const { return t == Null; } + bool isBool() const { return t == Bool; } + bool isDouble() const { return t == Double; } + bool isString() const { return t == String; } + bool isArray() const { return t == Array; } + bool isObject() const { return t == Object; } + bool isUndefined() const { return t == Undefined; } + + bool toBool(bool defaultValue = false) const; + int toInt(int defaultValue = 0) const; + double toDouble(double defaultValue = 0) const; + std::string toString(const std::string &defaultValue = std::string()) const; + JsonArray toArray() const; + JsonArray toArray(const JsonArray &defaultValue) const; + JsonObject toObject() const; + JsonObject toObject(const JsonObject &defaultValue) const; + + bool operator==(const JsonValue &other) const; + bool operator!=(const JsonValue &other) const; + +private: + // avoid implicit conversions from char * to bool + JsonValue(const void *) : t(Null) {} + friend class Internal::Value; + friend class JsonArray; + friend class JsonObject; + + JsonValue(Internal::Data *d, Internal::Base *b, const Internal::Value& v); + + void detach(); + + union { + uint64_t ui; + bool b; + double dbl; + Internal::SharedString *stringData; + Internal::Base *base; + }; + Internal::Data *d; // needed for Objects and Arrays + Type t; +}; + +class JsonValueRef +{ +public: + JsonValueRef(JsonArray *array, int idx) + : a(array), is_object(false), index(idx) {} + JsonValueRef(JsonObject *object, int idx) + : o(object), is_object(true), index(idx) {} + + operator JsonValue() const { return toValue(); } + JsonValueRef &operator=(const JsonValue &val); + JsonValueRef &operator=(const JsonValueRef &val); + + JsonValue::Type type() const { return toValue().type(); } + bool isNull() const { return type() == JsonValue::Null; } + bool isBool() const { return type() == JsonValue::Bool; } + bool isDouble() const { return type() == JsonValue::Double; } + bool isString() const { return type() == JsonValue::String; } + bool isArray() const { return type() == JsonValue::Array; } + bool isObject() const { return type() == JsonValue::Object; } + bool isUndefined() const { return type() == JsonValue::Undefined; } + + std::string toString() const { return toValue().toString(); } + JsonArray toArray() const; + JsonObject toObject() const; + + bool toBool(bool defaultValue = false) const { return toValue().toBool(defaultValue); } + int toInt(int defaultValue = 0) const { return toValue().toInt(defaultValue); } + double toDouble(double defaultValue = 0) const { return toValue().toDouble(defaultValue); } + std::string toString(const std::string &defaultValue) const { return toValue().toString(defaultValue); } + + bool operator==(const JsonValue &other) const { return toValue() == other; } + bool operator!=(const JsonValue &other) const { return toValue() != other; } + +private: + JsonValue toValue() const; + + union { + JsonArray *a; + JsonObject *o; + }; + uint32_t is_object : 1; + uint32_t index : 31; +}; + +class JsonValuePtr +{ + JsonValue value; +public: + explicit JsonValuePtr(const JsonValue& val) + : value(val) {} + + JsonValue& operator*() { return value; } + JsonValue* operator->() { return &value; } +}; + +class JsonValueRefPtr +{ + JsonValueRef valueRef; +public: + JsonValueRefPtr(JsonArray *array, int idx) + : valueRef(array, idx) {} + JsonValueRefPtr(JsonObject *object, int idx) + : valueRef(object, idx) {} + + JsonValueRef& operator*() { return valueRef; } + JsonValueRef* operator->() { return &valueRef; } +}; + + + +class JsonArray +{ +public: + JsonArray(); + JsonArray(std::initializer_list<JsonValue> args); + + ~JsonArray(); + + JsonArray(const JsonArray &other); + JsonArray &operator=(const JsonArray &other); + + int size() const; + int count() const { return size(); } + + bool isEmpty() const; + JsonValue at(int i) const; + JsonValue first() const; + JsonValue last() const; + + void prepend(const JsonValue &value); + void append(const JsonValue &value); + void removeAt(int i); + JsonValue takeAt(int i); + void removeFirst() { removeAt(0); } + void removeLast() { removeAt(size() - 1); } + + void insert(int i, const JsonValue &value); + void replace(int i, const JsonValue &value); + + bool contains(const JsonValue &element) const; + JsonValueRef operator[](int i); + JsonValue operator[](int i) const; + + bool operator==(const JsonArray &other) const; + bool operator!=(const JsonArray &other) const; + + class const_iterator; + + class iterator { + public: + JsonArray *a; + int i; + typedef std::random_access_iterator_tag iterator_category; + typedef int difference_type; + typedef JsonValue value_type; + typedef JsonValueRef reference; + typedef JsonValueRefPtr pointer; + + iterator() : a(nullptr), i(0) { } + explicit iterator(JsonArray *array, int index) : a(array), i(index) { } + + JsonValueRef operator*() const { return JsonValueRef(a, i); } + JsonValueRefPtr operator->() const { return JsonValueRefPtr(a, i); } + JsonValueRef operator[](int j) const { return JsonValueRef(a, i + j); } + + bool operator==(const iterator &o) const { return i == o.i; } + bool operator!=(const iterator &o) const { return i != o.i; } + bool operator<(const iterator& other) const { return i < other.i; } + bool operator<=(const iterator& other) const { return i <= other.i; } + bool operator>(const iterator& other) const { return i > other.i; } + bool operator>=(const iterator& other) const { return i >= other.i; } + bool operator==(const const_iterator &o) const { return i == o.i; } + bool operator!=(const const_iterator &o) const { return i != o.i; } + bool operator<(const const_iterator& other) const { return i < other.i; } + bool operator<=(const const_iterator& other) const { return i <= other.i; } + bool operator>(const const_iterator& other) const { return i > other.i; } + bool operator>=(const const_iterator& other) const { return i >= other.i; } + iterator &operator++() { ++i; return *this; } + iterator operator++(int) { iterator n = *this; ++i; return n; } + iterator &operator--() { i--; return *this; } + iterator operator--(int) { iterator n = *this; i--; return n; } + iterator &operator+=(int j) { i+=j; return *this; } + iterator &operator-=(int j) { i-=j; return *this; } + iterator operator+(int j) const { return iterator(a, i+j); } + iterator operator-(int j) const { return iterator(a, i-j); } + int operator-(iterator j) const { return i - j.i; } + }; + friend class iterator; + + class const_iterator { + public: + const JsonArray *a; + int i; + typedef std::random_access_iterator_tag iterator_category; + typedef std::ptrdiff_t difference_type; + typedef JsonValue value_type; + typedef JsonValue reference; + typedef JsonValuePtr pointer; + + const_iterator() : a(nullptr), i(0) { } + explicit const_iterator(const JsonArray *array, int index) : a(array), i(index) { } + const_iterator(const iterator &o) : a(o.a), i(o.i) {} + + JsonValue operator*() const { return a->at(i); } + JsonValuePtr operator->() const { return JsonValuePtr(a->at(i)); } + JsonValue operator[](int j) const { return a->at(i+j); } + bool operator==(const const_iterator &o) const { return i == o.i; } + bool operator!=(const const_iterator &o) const { return i != o.i; } + bool operator<(const const_iterator& other) const { return i < other.i; } + bool operator<=(const const_iterator& other) const { return i <= other.i; } + bool operator>(const const_iterator& other) const { return i > other.i; } + bool operator>=(const const_iterator& other) const { return i >= other.i; } + const_iterator &operator++() { ++i; return *this; } + const_iterator operator++(int) { const_iterator n = *this; ++i; return n; } + const_iterator &operator--() { i--; return *this; } + const_iterator operator--(int) { const_iterator n = *this; i--; return n; } + const_iterator &operator+=(int j) { i+=j; return *this; } + const_iterator &operator-=(int j) { i-=j; return *this; } + const_iterator operator+(int j) const { return const_iterator(a, i+j); } + const_iterator operator-(int j) const { return const_iterator(a, i-j); } + int operator-(const_iterator j) const { return i - j.i; } + }; + friend class const_iterator; + + // stl style + iterator begin() { detach(); return iterator(this, 0); } + const_iterator begin() const { return const_iterator(this, 0); } + const_iterator constBegin() const { return const_iterator(this, 0); } + iterator end() { detach(); return iterator(this, size()); } + const_iterator end() const { return const_iterator(this, size()); } + const_iterator constEnd() const { return const_iterator(this, size()); } + iterator insert(iterator before, const JsonValue &value) { insert(before.i, value); return before; } + iterator erase(iterator it) { removeAt(it.i); return it; } + + void push_back(const JsonValue &t) { append(t); } + void push_front(const JsonValue &t) { prepend(t); } + void pop_front() { removeFirst(); } + void pop_back() { removeLast(); } + bool empty() const { return isEmpty(); } + typedef int size_type; + typedef JsonValue value_type; + typedef value_type *pointer; + typedef const value_type *const_pointer; + typedef JsonValueRef reference; + typedef JsonValue const_reference; + typedef int difference_type; + +private: + friend class Internal::Data; + friend class JsonValue; + friend class JsonDocument; + + JsonArray(Internal::Data *data, Internal::Array *array); + void compact(); + void detach(uint32_t reserve = 0); + + Internal::Data *d; + Internal::Array *a; +}; + + +class JsonObject +{ +public: + JsonObject(); + JsonObject(std::initializer_list<std::pair<std::string, JsonValue> > args); + ~JsonObject(); + + JsonObject(const JsonObject &other); + JsonObject &operator =(const JsonObject &other); + + typedef std::vector<std::string> Keys; + Keys keys() const; + int size() const; + int count() const { return size(); } + int length() const { return size(); } + bool isEmpty() const; + + JsonValue value(const std::string &key) const; + JsonValue operator[] (const std::string &key) const; + JsonValueRef operator[] (const std::string &key); + + void remove(const std::string &key); + JsonValue take(const std::string &key); + bool contains(const std::string &key) const; + + bool operator==(const JsonObject &other) const; + bool operator!=(const JsonObject &other) const; + + class const_iterator; + + class iterator + { + friend class const_iterator; + friend class JsonObject; + JsonObject *o; + int i; + + public: + typedef std::bidirectional_iterator_tag iterator_category; + typedef int difference_type; + typedef JsonValue value_type; + typedef JsonValueRef reference; + + constexpr iterator() : o(nullptr), i(0) {} + constexpr iterator(JsonObject *obj, int index) : o(obj), i(index) {} + + std::string key() const { return o->keyAt(i); } + JsonValueRef value() const { return JsonValueRef(o, i); } + JsonValueRef operator*() const { return JsonValueRef(o, i); } + JsonValueRefPtr operator->() const { return JsonValueRefPtr(o, i); } + bool operator==(const iterator &other) const { return i == other.i; } + bool operator!=(const iterator &other) const { return i != other.i; } + + iterator &operator++() { ++i; return *this; } + iterator operator++(int) { iterator r = *this; ++i; return r; } + iterator &operator--() { --i; return *this; } + iterator operator--(int) { iterator r = *this; --i; return r; } + iterator operator+(int j) const + { iterator r = *this; r.i += j; return r; } + iterator operator-(int j) const { return operator+(-j); } + iterator &operator+=(int j) { i += j; return *this; } + iterator &operator-=(int j) { i -= j; return *this; } + + public: + bool operator==(const const_iterator &other) const { return i == other.i; } + bool operator!=(const const_iterator &other) const { return i != other.i; } + }; + friend class iterator; + + class const_iterator + { + friend class iterator; + const JsonObject *o; + int i; + + public: + typedef std::bidirectional_iterator_tag iterator_category; + typedef int difference_type; + typedef JsonValue value_type; + typedef JsonValue reference; + + constexpr const_iterator() : o(nullptr), i(0) {} + constexpr const_iterator(const JsonObject *obj, int index) + : o(obj), i(index) {} + const_iterator(const iterator &other) + : o(other.o), i(other.i) {} + + std::string key() const { return o->keyAt(i); } + JsonValue value() const { return o->valueAt(i); } + JsonValue operator*() const { return o->valueAt(i); } + JsonValuePtr operator->() const { return JsonValuePtr(o->valueAt(i)); } + bool operator==(const const_iterator &other) const { return i == other.i; } + bool operator!=(const const_iterator &other) const { return i != other.i; } + + const_iterator &operator++() { ++i; return *this; } + const_iterator operator++(int) { const_iterator r = *this; ++i; return r; } + const_iterator &operator--() { --i; return *this; } + const_iterator operator--(int) { const_iterator r = *this; --i; return r; } + const_iterator operator+(int j) const + { const_iterator r = *this; r.i += j; return r; } + const_iterator operator-(int j) const { return operator+(-j); } + const_iterator &operator+=(int j) { i += j; return *this; } + const_iterator &operator-=(int j) { i -= j; return *this; } + + bool operator==(const iterator &other) const { return i == other.i; } + bool operator!=(const iterator &other) const { return i != other.i; } + }; + friend class const_iterator; + + // STL style + iterator begin() { detach(); return iterator(this, 0); } + const_iterator begin() const { return const_iterator(this, 0); } + const_iterator constBegin() const { return const_iterator(this, 0); } + iterator end() { detach(); return iterator(this, size()); } + const_iterator end() const { return const_iterator(this, size()); } + const_iterator constEnd() const { return const_iterator(this, size()); } + iterator erase(iterator it); + + // more Qt + iterator find(const std::string &key); + const_iterator find(const std::string &key) const { return constFind(key); } + const_iterator constFind(const std::string &key) const; + iterator insert(const std::string &key, const JsonValue &value); + + // STL compatibility + typedef JsonValue mapped_type; + typedef std::string key_type; + typedef int size_type; + + bool empty() const { return isEmpty(); } + +private: + friend class Internal::Data; + friend class JsonValue; + friend class JsonDocument; + friend class JsonValueRef; + + JsonObject(Internal::Data *data, Internal::Object *object); + void detach(uint32_t reserve = 0); + void compact(); + + std::string keyAt(int i) const; + JsonValue valueAt(int i) const; + void setValueAt(int i, const JsonValue &val); + + Internal::Data *d; + Internal::Object *o; +}; + +struct JsonParseError +{ + enum ParseError { + NoError = 0, + UnterminatedObject, + MissingNameSeparator, + UnterminatedArray, + MissingValueSeparator, + IllegalValue, + TerminationByNumber, + IllegalNumber, + IllegalEscapeSequence, + IllegalUTF8String, + UnterminatedString, + MissingObject, + DeepNesting, + DocumentTooLarge, + GarbageAtEnd + }; + + int offset; + ParseError error; +}; + +class JsonDocument +{ +public: + static const uint32_t BinaryFormatTag = ('q') | ('b' << 8) | ('j' << 16) | ('s' << 24); + JsonDocument(); + explicit JsonDocument(const JsonObject &object); + explicit JsonDocument(const JsonArray &array); + ~JsonDocument(); + + JsonDocument(const JsonDocument &other); + JsonDocument &operator =(const JsonDocument &other); + + enum DataValidation { + Validate, + BypassValidation + }; + + static JsonDocument fromRawData(const char *data, int size, DataValidation validation = Validate); + const char *rawData(int *size) const; + + static JsonDocument fromBinaryData(const std::string &data, DataValidation validation = Validate); + std::string toBinaryData() const; + + enum JsonFormat { + Indented, + Compact + }; + + static JsonDocument fromJson(const std::string &json, JsonParseError *error = nullptr); + + std::string toJson(JsonFormat format = Indented) const; + + bool isEmpty() const; + bool isArray() const; + bool isObject() const; + + JsonObject object() const; + JsonArray array() const; + + void setObject(const JsonObject &object); + void setArray(const JsonArray &array); + + bool operator==(const JsonDocument &other) const; + bool operator!=(const JsonDocument &other) const { return !(*this == other); } + + bool isNull() const; + +private: + friend class JsonValue; + friend class Internal::Data; + friend class Internal::Parser; + + JsonDocument(Internal::Data *data); + + Internal::Data *d; +}; + +} // namespace Json + +#endif // JSONVALUE_H |