base64.hpp File Reference

#include <algorithm>
#include <iterator>
#include <limits>
#include <string_view>

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Classes
class	Base64
	Encodes and decodes byte streams using base64. More...

Functions
consteval char	lut_idx (std::string_view lut, char c)
	Performs a reverse look-up.
consteval auto	gen_rlut (std::string_view lut)
	Creates an array that contains the position of every byte in lut.

Function Documentation

gen_rlut()

auto gen_rlut ( std::string_view lut )

consteval

Creates an array that contains the position of every byte in lut.

Returns

An array a such that:

• a[c] == 0 if c is not found in a or is =
• lut[a[c]] == c otherwise

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lut_idx()

char lut_idx ( std::string_view lut, char c )

consteval

Performs a reverse look-up.

Parameters

lut	Look-up table.
c	Character whose position in lut is returned.

Returns

The position of c or lut.size() if not found.

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