pimoroni-pico/common/unicode_sorta.hpp

#pragma once

#include <cstdint>

/*
This file exists to allow space-efficient rendering of accented characters.

It permits rudimentary support for unicode characters by providing a lookup
table to map anything prefixed with 0xc3 to its non-accented equivilent.
*/

namespace unicode_sorta {

const uint8_t UNICODE_PREFIX = 0xc3;

enum accents : uint8_t {
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_TILDE,
    ACCENT_DIAERESIS,
    ACCENT_RING_ABOVE,
    ACCENT_STROKE,
    ACCENT_CEDILLA,
    ACCENT_NONE,
};

static const accents char_accent[] = {
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_TILDE,
    ACCENT_DIAERESIS,
    ACCENT_RING_ABOVE,
    ACCENT_NONE,
    ACCENT_CEDILLA,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_DIAERESIS,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_DIAERESIS,
    ACCENT_NONE,
    ACCENT_TILDE,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_TILDE,
    ACCENT_DIAERESIS,
    ACCENT_NONE,
    ACCENT_STROKE,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_DIAERESIS,
    ACCENT_ACUTE,
    ACCENT_NONE,
    ACCENT_NONE,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_TILDE,
    ACCENT_DIAERESIS,
    ACCENT_RING_ABOVE,
    ACCENT_NONE,
    ACCENT_CEDILLA,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_DIAERESIS,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_DIAERESIS,
    ACCENT_NONE,
    ACCENT_TILDE,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_TILDE,
    ACCENT_DIAERESIS,
    ACCENT_NONE,
    ACCENT_STROKE,
    ACCENT_GRAVE,
    ACCENT_ACUTE,
    ACCENT_CIRCUMFLEX,
    ACCENT_DIAERESIS,
    ACCENT_ACUTE,
    ACCENT_NONE,
    ACCENT_DIAERESIS
};

static const char char_base[] = {
    'A', // À - c3 80 - A + GRAVE
    'A', // Á - c3 81 - A + ACUTE
    'A', // Â - c3 82 - A + CIRCUMFLEX
    'A', // Ã - c3 83 - A + TILDE
    'A', // Ä - c3 84 - A + DIAERESIS
    'A', // Å - c3 85 - A + RING ABOVE
    ' ', // Æ - c3 86 - AE
    'C', // Ç - c3 87 - C + CEDILLA
    'E', // È - c3 88 - E + GRAVE
    'E', // É - c3 89 - E + ACUTE
    'E', // Ê - c3 8a - E + CIRCUMFLEX
    'E', // Ë - c3 8b - E + DIAERESIS
    'I', // Ì - c3 8c - I + GRAVE
    'I', // Í - c3 8d - I + ACUTE
    'I', // Î - c3 8e - I + CIRCUMFLEX
    'I', // Ï - c3 8f - I + DIAERESIS
    'D', // Ð - c3 90 - ETH
    'N', // Ñ - c3 91 - N + TILDE
    'O', // Ò - c3 92 - O + GRAVE
    'O', // Ó - c3 93 - O + ACUTE
    'O', // Ô - c3 94 - O + CIRCUMFLEX
    'O', // Õ - c3 95 - O + TILDE
    'O', // Ö - c3 96 - O + DIAERESIS
    'x', // × - c3 97 - MULTIPLICATION SIGN
    'O', // Ø - c3 98 - O + STROKE
    'U', // Ù - c3 99 - U + GRAVE
    'U', // Ú - c3 9a - U + ACUTE
    'U', // Û - c3 9b - U + CIRCUMFLEX
    'U', // Ü - c3 9c - U + DIAERESIS
    'Y', // Ý - c3 9d - Y + ACUTE
    ' ', // Þ - c3 9e - THORN
    ' ', // ß - c3 9f - SHARP S
    'a', // à - c3 a0 - A + GRAVE
    'a', // á - c3 a1 - A + ACUTE
    'a', // â - c3 a2 - A + CIRCUMFLEX
    'a', // ã - c3 a3 - A + TILDE
    'a', // ä - c3 a4 - A + DIAERESIS
    'a', // å - c3 a5 - A + RING ABOVE
    ' ', // æ - c3 a6 - AE
    'c', // ç - c3 a7 - C + CEDILLA
    'e', // è - c3 a8 - E + GRAVE
    'e', // é - c3 a9 - E + ACUTE
    'e', // ê - c3 aa - E + CIRCUMFLEX
    'e', // ë - c3 ab - E + DIAERESIS
    'i', // ì - c3 ac - I + GRAVE
    'i', // í - c3 ad - I + ACUTE
    'i', // î - c3 ae - I + CIRCUMFLEX
    'i', // ï - c3 af - I + DIAERESIS
    'o', // ð - c3 b0 - ETH
    'n', // ñ - c3 b1 - N + TILDE
    'o', // ò - c3 b2 - O + GRAVE
    'o', // ó - c3 b3 - O + ACUTE
    'o', // ô - c3 b4 - O + CIRCUMFLEX
    'o', // õ - c3 b5 - O + TILDE
    'o', // ö - c3 b6 - O + DIAERESIS
    '/', // ÷ - c3 b7 - DIVISION SIGN
    'o', // ø - c3 b8 - O + STROKE
    'u', // ù - c3 b9 - U + GRAVE
    'u', // ú - c3 ba - U + ACUTE
    'u', // û - c3 bb - U + CIRCUMFLEX
    'u', // ü - c3 bc - U + DIAERESIS
    'y', // ý - c3 bd - Y + ACUTE
    ' ', // þ - c3 be - THORN
    'y', // ÿ - c3 bf - Y + DIAERESIS
};

}