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FRC2016-old/Robot2016/wpilib/cpp/current/include/nt_Value.h

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/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2015. All Rights Reserved. */
/* Open Source Software - may be modified and shared by FRC teams. The code */
/* must be accompanied by the FIRST BSD license file in the root directory of */
/* the project. */
/*----------------------------------------------------------------------------*/
#ifndef NT_VALUE_H_
#define NT_VALUE_H_
#include <cassert>
#include <memory>
#include <string>
#include <type_traits>
#include <vector>
#include "llvm/ArrayRef.h"
#include "llvm/StringRef.h"
#include "ntcore_c.h"
namespace nt {
using llvm::ArrayRef;
using llvm::StringRef;
/** NetworkTables Entry Value */
class Value {
struct private_init {};
public:
Value();
Value(NT_Type type, const private_init&);
~Value();
NT_Type type() const { return m_val.type; }
const NT_Value& value() const { return m_val; }
unsigned long long last_change() const { return m_val.last_change; }
/*
* Type Checkers
*/
bool IsBoolean() const { return m_val.type == NT_BOOLEAN; }
bool IsDouble() const { return m_val.type == NT_DOUBLE; }
bool IsString() const { return m_val.type == NT_STRING; }
bool IsRaw() const { return m_val.type == NT_RAW; }
bool IsRpc() const { return m_val.type == NT_RPC; }
bool IsBooleanArray() const { return m_val.type == NT_BOOLEAN_ARRAY; }
bool IsDoubleArray() const { return m_val.type == NT_DOUBLE_ARRAY; }
bool IsStringArray() const { return m_val.type == NT_STRING_ARRAY; }
/*
* Type-Safe Getters
*/
bool GetBoolean() const {
assert(m_val.type == NT_BOOLEAN);
return m_val.data.v_boolean != 0;
}
double GetDouble() const {
assert(m_val.type == NT_DOUBLE);
return m_val.data.v_double;
}
StringRef GetString() const {
assert(m_val.type == NT_STRING);
return m_string;
}
StringRef GetRaw() const {
assert(m_val.type == NT_RAW);
return m_string;
}
StringRef GetRpc() const {
assert(m_val.type == NT_RPC);
return m_string;
}
ArrayRef<int> GetBooleanArray() const {
assert(m_val.type == NT_BOOLEAN_ARRAY);
return ArrayRef<int>(m_val.data.arr_boolean.arr,
m_val.data.arr_boolean.size);
}
ArrayRef<double> GetDoubleArray() const {
assert(m_val.type == NT_DOUBLE_ARRAY);
return ArrayRef<double>(m_val.data.arr_double.arr,
m_val.data.arr_double.size);
}
ArrayRef<std::string> GetStringArray() const {
assert(m_val.type == NT_STRING_ARRAY);
return m_string_array;
}
static std::shared_ptr<Value> MakeBoolean(bool value) {
auto val = std::make_shared<Value>(NT_BOOLEAN, private_init());
val->m_val.data.v_boolean = value;
return val;
}
static std::shared_ptr<Value> MakeDouble(double value) {
auto val = std::make_shared<Value>(NT_DOUBLE, private_init());
val->m_val.data.v_double = value;
return val;
}
static std::shared_ptr<Value> MakeString(StringRef value) {
auto val = std::make_shared<Value>(NT_STRING, private_init());
val->m_string = value;
val->m_val.data.v_string.str = const_cast<char*>(val->m_string.c_str());
val->m_val.data.v_string.len = val->m_string.size();
return val;
}
#ifdef _MSC_VER
template <typename T, typename = std::enable_if_t<std::is_same<T, std::string>>>
#else
template <typename T,
typename std::enable_if<std::is_same<T, std::string>::value>::type>
#endif
static std::shared_ptr<Value> MakeString(T&& value) {
auto val = std::make_shared<Value>(NT_STRING, private_init());
val->m_string = std::move(value);
val->m_val.data.v_string.str = const_cast<char*>(val->m_string.c_str());
val->m_val.data.v_string.len = val->m_string.size();
return val;
}
static std::shared_ptr<Value> MakeRaw(StringRef value) {
auto val = std::make_shared<Value>(NT_RAW, private_init());
val->m_string = value;
val->m_val.data.v_raw.str = const_cast<char*>(val->m_string.c_str());
val->m_val.data.v_raw.len = val->m_string.size();
return val;
}
#ifdef _MSC_VER
template <typename T, typename = std::enable_if_t<std::is_same<T, std::string>>>
#else
template <typename T,
typename std::enable_if<std::is_same<T, std::string>::value>::type>
#endif
static std::shared_ptr<Value> MakeRaw(T&& value) {
auto val = std::make_shared<Value>(NT_RAW, private_init());
val->m_string = std::move(value);
val->m_val.data.v_raw.str = const_cast<char*>(val->m_string.c_str());
val->m_val.data.v_raw.len = val->m_string.size();
return val;
}
static std::shared_ptr<Value> MakeRpc(StringRef value) {
auto val = std::make_shared<Value>(NT_RPC, private_init());
val->m_string = value;
val->m_val.data.v_raw.str = const_cast<char*>(val->m_string.c_str());
val->m_val.data.v_raw.len = val->m_string.size();
return val;
}
template <typename T>
static std::shared_ptr<Value> MakeRpc(T&& value) {
auto val = std::make_shared<Value>(NT_RPC, private_init());
val->m_string = std::move(value);
val->m_val.data.v_raw.str = const_cast<char*>(val->m_string.c_str());
val->m_val.data.v_raw.len = val->m_string.size();
return val;
}
static std::shared_ptr<Value> MakeBooleanArray(ArrayRef<int> value);
static std::shared_ptr<Value> MakeDoubleArray(ArrayRef<double> value);
static std::shared_ptr<Value> MakeStringArray(ArrayRef<std::string> value);
// Note: This function moves the values out of the vector.
static std::shared_ptr<Value> MakeStringArray(
std::vector<std::string>&& value);
Value(const Value&) = delete;
Value& operator=(const Value&) = delete;
friend bool operator==(const Value& lhs, const Value& rhs);
private:
NT_Value m_val;
std::string m_string;
std::vector<std::string> m_string_array;
};
bool operator==(const Value& lhs, const Value& rhs);
inline bool operator!=(const Value& lhs, const Value& rhs) {
return !(lhs == rhs);
}
} // namespace nt
#endif // NT_VALUE_H_