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// Copyright 2014 BitPay Inc.
// Copyright 2015 Bitcoin Core Developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or https://opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_H
#define BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_H
#include <charconv>
#include <cstdint>
#include <cstring>
#include <map>
#include <stdexcept>
#include <string>
#include <type_traits>
#include <vector>
class UniValue {
public:
enum VType { VNULL, VOBJ, VARR, VSTR, VNUM, VBOOL, };
class type_error : public std::runtime_error
{
using std::runtime_error::runtime_error;
};
UniValue() { typ = VNULL; }
UniValue(UniValue::VType type, std::string str = {}) : typ{type}, val{std::move(str)} {}
template <typename Ref, typename T = std::remove_cv_t<std::remove_reference_t<Ref>>,
std::enable_if_t<std::is_floating_point_v<T> || // setFloat
std::is_same_v<bool, T> || // setBool
std::is_signed_v<T> || std::is_unsigned_v<T> || // setInt
std::is_constructible_v<std::string, T>, // setStr
bool> = true>
UniValue(Ref&& val)
{
if constexpr (std::is_floating_point_v<T>) {
setFloat(val);
} else if constexpr (std::is_same_v<bool, T>) {
setBool(val);
} else if constexpr (std::is_signed_v<T>) {
setInt(int64_t{val});
} else if constexpr (std::is_unsigned_v<T>) {
setInt(uint64_t{val});
} else {
setStr(std::string{std::forward<Ref>(val)});
}
}
void clear();
void setNull();
void setBool(bool val);
void setNumStr(std::string str);
void setInt(uint64_t val);
void setInt(int64_t val);
void setInt(int val_) { return setInt(int64_t{val_}); }
void setFloat(double val);
void setStr(std::string str);
void setArray();
void setObject();
enum VType getType() const { return typ; }
const std::string& getValStr() const { return val; }
bool empty() const { return (values.size() == 0); }
size_t size() const { return values.size(); }
void getObjMap(std::map<std::string,UniValue>& kv) const;
bool checkObject(const std::map<std::string,UniValue::VType>& memberTypes) const;
const UniValue& operator[](const std::string& key) const;
const UniValue& operator[](size_t index) const;
bool exists(const std::string& key) const { size_t i; return findKey(key, i); }
bool isNull() const { return (typ == VNULL); }
bool isTrue() const { return (typ == VBOOL) && (val == "1"); }
bool isFalse() const { return (typ == VBOOL) && (val != "1"); }
bool isBool() const { return (typ == VBOOL); }
bool isStr() const { return (typ == VSTR); }
bool isNum() const { return (typ == VNUM); }
bool isArray() const { return (typ == VARR); }
bool isObject() const { return (typ == VOBJ); }
void push_back(UniValue val);
void push_backV(const std::vector<UniValue>& vec);
template <class It>
void push_backV(It first, It last);
void __pushKV(std::string key, UniValue val);
void pushKV(std::string key, UniValue val);
void pushKVs(UniValue obj);
std::string write(unsigned int prettyIndent = 0,
unsigned int indentLevel = 0) const;
bool read(const char *raw, size_t len);
bool read(const char *raw) { return read(raw, strlen(raw)); }
bool read(const std::string& rawStr) {
return read(rawStr.data(), rawStr.size());
}
private:
UniValue::VType typ;
std::string val; // numbers are stored as C++ strings
std::vector<std::string> keys;
std::vector<UniValue> values;
void checkType(const VType& expected) const;
bool findKey(const std::string& key, size_t& retIdx) const;
void writeArray(unsigned int prettyIndent, unsigned int indentLevel, std::string& s) const;
void writeObject(unsigned int prettyIndent, unsigned int indentLevel, std::string& s) const;
public:
// Strict type-specific getters, these throw std::runtime_error if the
// value is of unexpected type
const std::vector<std::string>& getKeys() const;
const std::vector<UniValue>& getValues() const;
template <typename Int>
Int getInt() const;
bool get_bool() const;
const std::string& get_str() const;
double get_real() const;
const UniValue& get_obj() const;
const UniValue& get_array() const;
enum VType type() const { return getType(); }
friend const UniValue& find_value( const UniValue& obj, const std::string& name);
};
template <class It>
void UniValue::push_backV(It first, It last)
{
checkType(VARR);
values.insert(values.end(), first, last);
}
template <typename Int>
Int UniValue::getInt() const
{
static_assert(std::is_integral<Int>::value);
checkType(VNUM);
Int result;
const auto [first_nonmatching, error_condition] = std::from_chars(val.data(), val.data() + val.size(), result);
if (first_nonmatching != val.data() + val.size() || error_condition != std::errc{}) {
throw std::runtime_error("JSON integer out of range");
}
return result;
}
enum jtokentype {
JTOK_ERR = -1,
JTOK_NONE = 0, // eof
JTOK_OBJ_OPEN,
JTOK_OBJ_CLOSE,
JTOK_ARR_OPEN,
JTOK_ARR_CLOSE,
JTOK_COLON,
JTOK_COMMA,
JTOK_KW_NULL,
JTOK_KW_TRUE,
JTOK_KW_FALSE,
JTOK_NUMBER,
JTOK_STRING,
};
extern enum jtokentype getJsonToken(std::string& tokenVal,
unsigned int& consumed, const char *raw, const char *end);
extern const char *uvTypeName(UniValue::VType t);
static inline bool jsonTokenIsValue(enum jtokentype jtt)
{
switch (jtt) {
case JTOK_KW_NULL:
case JTOK_KW_TRUE:
case JTOK_KW_FALSE:
case JTOK_NUMBER:
case JTOK_STRING:
return true;
default:
return false;
}
// not reached
}
static inline bool json_isspace(int ch)
{
switch (ch) {
case 0x20:
case 0x09:
case 0x0a:
case 0x0d:
return true;
default:
return false;
}
// not reached
}
extern const UniValue NullUniValue;
const UniValue& find_value( const UniValue& obj, const std::string& name);
#endif // BITCOIN_UNIVALUE_INCLUDE_UNIVALUE_H
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