fundamentaltypes.h File Reference

#include "elementa/license.inc"
#include "elementa/checks.inc"
#include <cstdint>
#include <climits>
#include <cstddef>
#include <type_traits>
#include <cmath>

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INTEGRAL TYPES EXTENSIONS
enum class	elementa::base::endian { little = 0 , big = 1 , native = little }
	Endianness of the target machine, as defined in the C++20 standard. More...
enum class	elementa::base::SignSpec : uint8_t { kSigned = 0 , kUnsigned }
	Defines the possible sign of a fundamental (integral) type. More...
using	elementa::base::sizebits_t = unsigned
	Type able to index all bits in the longest int. type in the target machine. More...
using	elementa::base::sizebytes_t = unsigned
	Type able to index all bytes in the longest int. type in the target machine. More...
using	elementa::base::LongestUnsigned = unsigned long long
	Longest unsigned integral type in the target machine. More...
using	elementa::base::LongestInt = long long
	Longest signed integral type in the target machine. More...
using	elementa::base::LongestReal = long double
	Longest real type. More...
template<sizebits_t NBITS, SignSpec SIGN>
using	elementa::base::ExactInteger = typename std::conditional<((NBITS==8) &&(SIGN==SignSpec::kSigned)), int8_t, typename std::conditional<((NBITS==8) &&(SIGN==SignSpec::kUnsigned)), uint8_t, typename std::conditional<((NBITS==16) &&(SIGN==SignSpec::kSigned)), int16_t, typename std::conditional<((NBITS==16) &&(SIGN==SignSpec::kUnsigned)), uint16_t, typename std::conditional<((NBITS==32) &&(SIGN==SignSpec::kSigned) &&(kMaxBitsInt > 16)), int32_t, typename std::conditional<((NBITS==32) &&(SIGN==SignSpec::kUnsigned) &&(kMaxBitsInt > 16)), uint32_t, typename std::conditional<((NBITS==64) &&(SIGN==SignSpec::kSigned) &&(kMaxBitsInt > 32)), int64_t, typename std::conditional<((NBITS==64) &&(SIGN==SignSpec::kUnsigned) &&(kMaxBitsInt > 32)), uint64_t, void >::type >::type >::type >::type >::type >::type >::type >::type
	To get an int. type with given characteristics of number of bits and sign. More...
constexpr sizebits_t	elementa::base::kMaxBitsInt = 16
	Maximum number of bits in an integer type in the target machine. More...
constexpr sizebits_t	elementa::base::kLeastSizeForBits (sizebits_t nbs)
	Shortest integral type for holding a number of bits in the target machine. More...
template<typename I >
constexpr I	elementa::base::kNBitsSet (sizebits_t n)
	Compute an integral constant with its N least-significant bits set. More...
uint8_t	elementa::base::len_for_bits (uint8_t nbits)
	Maximum number of digits needed for the decimal form of NBITS binary numbers.
template<typename T >
sizebits_t	elementa::base::count_bits (T v)
	Count the number of bits that are set in an integral value. More...
template<typename T , sizebits_t N = sizeof(T)*CHAR_BIT>
sizebits_t	elementa::base::most_significant_bit (T b)
	Return the index of the MSb set in B, or the number of bits in T if none. More...
template<typename PT >
const PT *	elementa::base::kPtrPlusBytes (const PT *p, size_t boff)
	Add a number of bytes to the address of a pointer without changing its type. More...
LongestUnsigned	elementa::base::to_number (const void *p)
	Convert a pointer address to a number.
int	elementa::base::to_number (char n)
	Convert a char into a number (useful for printing, for ex.).
unsigned	elementa::base::to_number (unsigned char n)
	Convert an unsigned char into a number (useful for printing, for ex.).