217 lines
7.5 KiB
C++
217 lines
7.5 KiB
C++
/// \file json.h Holds all JSON-related headers.
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#pragma once
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#include <string>
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#include <deque>
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#include <map>
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#include <istream>
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#include <vector>
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#include <set>
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#include "socket.h"
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/// JSON-related classes and functions
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namespace JSON {
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/// Lists all types of JSON::Value.
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enum ValueType {
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EMPTY, BOOL, INTEGER, DOUBLE, STRING, ARRAY, OBJECT
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};
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/// JSON-string-escapes a value
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std::string string_escape(const std::string & val);
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/// A JSON::Value is either a string or an integer, but may also be an object, array or null.
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class Value {
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friend class Iter;
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friend class ConstIter;
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private:
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ValueType myType;
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long long int intVal;
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std::string strVal;
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double dblVal;
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double dblDivider;
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std::deque<Value*> arrVal;
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std::map<std::string, Value*> objVal;
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public:
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//constructors/destructors
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Value();
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~Value();
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Value(const Value & rhs);
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Value(std::istream & fromstream);
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Value(const std::string & val);
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Value(const char * val);
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Value(long long int val);
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Value(double val);
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Value(bool val);
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//comparison operators
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bool operator==(const Value & rhs) const;
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bool operator!=(const Value & rhs) const;
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bool compareExcept(const Value & rhs, const std::set<std::string> & skip) const;
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bool compareOnly(const Value & rhs, const std::set<std::string> & check) const;
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//assignment operators
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Value & assignFrom(const Value & rhs, const std::set<std::string> & skip);
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Value & operator=(const Value & rhs);
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Value & operator=(const std::string & rhs);
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Value & operator=(const char * rhs);
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Value & operator=(const long long int & rhs);
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Value & operator=(const int & rhs);
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Value & operator=(const double & rhs);
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Value & operator=(const unsigned int & rhs);
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Value & operator=(const bool & rhs);
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//converts to basic types
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operator long long int() const;
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operator std::string() const;
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operator bool() const;
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operator double() const;
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const std::string asString() const;
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const long long int asInt() const;
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const double asDouble() const;
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const bool asBool() const;
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const std::string & asStringRef() const;
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const char * c_str() const;
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//array operator for maps and arrays
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Value & operator[](const std::string i);
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Value & operator[](const char * i);
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Value & operator[](unsigned int i);
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const Value & operator[](const std::string i) const;
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const Value & operator[](const char * i) const;
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const Value & operator[](unsigned int i) const;
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//handy functions and others
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std::string toPacked() const;
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void sendTo(Socket::Connection & socket) const;
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unsigned int packedSize() const;
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void netPrepare();
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std::string & toNetPacked();
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std::string toString() const;
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std::string toPrettyString(int indentation = 0) const;
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void append(const Value & rhs);
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void prepend(const Value & rhs);
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void shrink(unsigned int size);
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void removeMember(const std::string & name);
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void removeMember(const std::deque<Value*>::iterator & it);
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void removeMember(const std::map<std::string, Value*>::iterator & it);
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void removeNullMembers();
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bool isMember(const std::string & name) const;
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bool isInt() const;
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bool isDouble() const;
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bool isString() const;
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bool isBool() const;
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bool isObject() const;
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bool isArray() const;
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bool isNull() const;
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unsigned int size() const;
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void null();
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};
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Value fromDTMI2(std::string & data);
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Value fromDTMI2(const unsigned char * data, unsigned int len, unsigned int & i);
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Value fromDTMI(std::string & data);
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Value fromDTMI(const unsigned char * data, unsigned int len, unsigned int & i);
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Value fromString(const std::string & json);
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Value fromString(const char * data, const uint32_t data_len);
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Value fromFile(std::string filename);
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void fromDTMI2(std::string & data, Value & ret);
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void fromDTMI2(const unsigned char * data, unsigned int len, unsigned int & i, Value & ret);
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void fromDTMI(std::string & data, Value & ret);
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void fromDTMI(const unsigned char * data, unsigned int len, unsigned int & i, Value & ret);
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class Iter {
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public:
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Iter(Value & root);///<Construct from a root Value to iterate over.
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Value & operator*() const;///< Dereferences into a Value reference.
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Value* operator->() const;///< Dereferences into a Value reference.
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operator bool() const;///< True if not done iterating.
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Iter & operator++();///<Go to next iteration.
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const std::string & key() const;///<Return the name of the current indice.
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unsigned int num() const;///<Return the number of the current indice.
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void remove();///<Delete the current indice from the parent JSON::Value.
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private:
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ValueType myType;
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Value * r;
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unsigned int i;
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std::deque<Value*>::iterator aIt;
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std::map<std::string, Value*>::iterator oIt;
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};
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class ConstIter {
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public:
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ConstIter(const Value & root);///<Construct from a root Value to iterate over.
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const Value & operator*() const;///< Dereferences into a Value reference.
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const Value* operator->() const;///< Dereferences into a Value reference.
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operator bool() const;///< True if not done iterating.
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ConstIter & operator++();///<Go to next iteration.
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const std::string & key() const;///<Return the name of the current indice.
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unsigned int num() const;///<Return the number of the current indice.
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private:
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ValueType myType;
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const Value * r;
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unsigned int i;
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std::deque<Value*>::const_iterator aIt;
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std::map<std::string, Value*>::const_iterator oIt;
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};
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#define jsonForEach(val, i) for(JSON::Iter i(val); i; ++i)
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#define jsonForEachConst(val, i) for(JSON::ConstIter i(val); i; ++i)
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template <typename T>
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std::string encodeVector(T begin, T end) {
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std::string result;
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for (T it = begin; it != end; it++) {
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long long int tmp = (*it);
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while (tmp >= 0xFFFF) {
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result += (char)0xFF;
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result += (char)0xFF;
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tmp -= 0xFFFF;
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}
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result += (char)(tmp / 256);
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result += (char)(tmp % 256);
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}
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return result;
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}
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template <typename T>
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void decodeVector(std::string input, T & result) {
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result.clear();
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unsigned int tmp = 0;
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for (int i = 0; i < input.size(); i += 2) {
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unsigned int curLen = (input[i] << 8) + input[i + 1];
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tmp += curLen;
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if (curLen != 0xFFFF) {
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result.push_back(tmp);
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tmp = 0;
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}
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}
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}
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template <typename T>
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std::string encodeVector4(T begin, T end) {
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std::string result;
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for (T it = begin; it != end; it++) {
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long long int tmp = (*it);
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while (tmp >= 0xFFFFFFFF) {
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result += (char)0xFF;
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result += (char)0xFF;
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result += (char)0xFF;
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result += (char)0xFF;
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tmp -= 0xFFFFFFFF;
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}
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result += (char)((tmp & 0xFF000000) >> 24);
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result += (char)((tmp & 0x00FF0000) >> 16);
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result += (char)((tmp & 0x0000FF00) >> 8);
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result += (char)((tmp & 0x000000FF));
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}
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return result;
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}
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template <typename T>
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void decodeVector4(std::string input, T & result) {
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result.clear();
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unsigned int tmp = 0;
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for (int i = 0; i < input.size(); i += 4) {
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unsigned int curLen = (input[i] << 24) + (input[i + 1] << 16) + (input[i + 2] << 8) + (input[i + 3]);
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tmp += curLen;
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if (curLen != 0xFFFFFFFF) {
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result.push_back(tmp);
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tmp = 0;
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}
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}
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}
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}
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