From 068a179cef0d1eebe17771270fa82cc3d693c9a5 Mon Sep 17 00:00:00 2001
From: BlackMark <me@blackmark.me>
Date: Tue, 7 Apr 2020 03:49:21 +0200
Subject: [PATCH] Add type header, formerly uart utils

---
 type.hpp | 141 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 type.hpp

diff --git a/type.hpp b/type.hpp
new file mode 100644
index 0000000..4e76b2f
--- /dev/null
+++ b/type.hpp
@@ -0,0 +1,141 @@
+#pragma once
+
+// Fix for limits.h not exposing LLONG_MIN, LLONG_MIN, and ULLONG_MAX to C++ context
+#ifdef __cplusplus
+#define __STDC_VERSION__ 201112L
+#endif
+
+#include <float.h>
+#include <limits.h>
+
+namespace type {
+
+// clang-format off
+template <bool Val> struct set_bool { static constexpr auto value = Val; };
+
+struct true_type : set_bool<true> {};
+struct false_type : set_bool<false> {};
+
+template <typename...> struct always_false : false_type {};
+
+template <typename... Ts> static constexpr auto always_false_v = always_false<Ts...>::value;
+
+template <typename T> struct is_integral : false_type {};
+template <> struct is_integral<bool> : true_type {};
+template <> struct is_integral<char> : true_type {};
+template <> struct is_integral<signed char> : true_type {};
+template <> struct is_integral<unsigned char> : true_type {};
+template <> struct is_integral<short> : true_type {};
+template <> struct is_integral<int> : true_type {};
+template <> struct is_integral<long int> : true_type {};
+template <> struct is_integral<long long int> : true_type {};
+template <> struct is_integral<unsigned short> : true_type {};
+template <> struct is_integral<unsigned int> : true_type {};
+template <> struct is_integral<unsigned long int> : true_type {};
+template <> struct is_integral<unsigned long long int> : true_type {};
+
+template <typename T> static constexpr auto is_integral_v = is_integral<T>::value;
+
+template <typename T, typename U> struct is_same : false_type {};
+template <typename T> struct is_same<T, T> : true_type {};
+
+template <typename T, typename U> static constexpr auto is_same_v = is_same<T, U>::value;
+
+template <typename T>
+struct NumericLimits {
+	static constexpr T min() { return T(); }
+	static constexpr T max() { return T(); }
+};
+
+template <>
+struct NumericLimits<bool> {
+	static constexpr bool min() { return false; }
+	static constexpr bool max() { return true; }
+};
+
+template <>
+struct NumericLimits<char> {
+	static constexpr char min() { return CHAR_MIN; }
+	static constexpr char max() { return CHAR_MAX; }
+};
+
+template <>
+struct NumericLimits<signed char> {
+	static constexpr signed char min() { return SCHAR_MIN; }
+	static constexpr signed char max() { return SCHAR_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned char> {
+	static constexpr unsigned char min() { return 0; }
+	static constexpr unsigned char max() { return UCHAR_MAX; }
+};
+
+template <>
+struct NumericLimits<short> {
+	static constexpr short min() { return SHRT_MIN; }
+	static constexpr short max() { return SHRT_MAX; }
+};
+
+template <>
+struct NumericLimits<int> {
+	static constexpr int min() { return INT_MIN; }
+	static constexpr int max() { return INT_MAX; }
+};
+
+template <>
+struct NumericLimits<long> {
+	static constexpr long int min() { return LONG_MIN; }
+	static constexpr long int max() { return LONG_MAX; }
+};
+
+template <>
+struct NumericLimits<long long int> {
+	static constexpr long long int min() { return LLONG_MIN; }
+	static constexpr long long int max() { return LLONG_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned short> {
+	static constexpr unsigned short min() { return 0; }
+	static constexpr unsigned short max() { return USHRT_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned int> {
+	static constexpr unsigned int min() { return 0; }
+	static constexpr unsigned int max() { return UINT_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned long int> {
+	static constexpr unsigned long int min() { return 0; }
+	static constexpr unsigned long int max() { return ULONG_MAX; }
+};
+
+template <>
+struct NumericLimits<unsigned long long int> {
+	static constexpr unsigned long long int min() { return 0; }
+	static constexpr unsigned long long int max() { return ULLONG_MAX; }
+};
+
+template <>
+struct NumericLimits<float> {
+	template <typename... Ts> static constexpr float min() { return FLT_MIN; }
+	template <typename... Ts> static constexpr float max() { return FLT_MAX; }
+};
+
+template <>
+struct NumericLimits<double> {
+	template <typename... Ts> static constexpr double min() { return DBL_MIN; }
+	template <typename... Ts> static constexpr double max() { return DBL_MAX; }
+};
+
+template <>
+struct NumericLimits<long double> {
+	template <typename... Ts> static constexpr long double min() { return LDBL_MIN; }
+	template <typename... Ts> static constexpr long double max() { return LDBL_MAX; }
+};
+// clang-format on
+
+} // namespace type