raspikeyer/src/morse.cpp

#include <cstdio>
#include <cstring>

#include "pico/stdio.h"

#include "morse.h"

MorseCode::MorseCode() { buildMap(); }

bool MorseCode::charToMorse(const unsigned char ch, char *morseSymbols)
{
    size_t index {0};

    if (ch != ' ' && morseMap[ch] == nullptr) {
        return false;
    }

    if (ch == ' ') {
        morseSymbols[index++] = 'w';
    } else {
        for (unsigned int i = 0; i < strlen(morseMap[ch]); i++) {
            char m = morseMap[ch][i];

            morseSymbols[index++] = m;

            if (i < strlen(morseMap[ch]) - 1) {
                morseSymbols[index++] = 'i';
            }
        }

        morseSymbols[index++] = 'c';
    }

    morseSymbols[index] = '\0';

    return true;
}

void MorseCode::sendCharacter(const char ch)
{
    char morseSymbols[32] {0};

    if (!charToMorse(ch, morseSymbols)) {
        return;
    }

    for (unsigned int i = 0; i < strlen(morseSymbols); i++) {
        printf("%c", morseSymbols[i]);
    }
}

void MorseCode::buildMap()
{
    for (size_t i = 0; i < 256; i++) {
        if (i == '\"')
            morseMap[i] = morseTable[0];
        else if (i == '$')
            morseMap[i] = morseTable[1];
        else if (i == '\'')
            morseMap[i] = morseTable[2];
        else if (i == '(')
            morseMap[i] = morseTable[3];
        else if (i == ')')
            morseMap[i] = morseTable[4];
        else if (i >= '+' && i <= ']')
            morseMap[i] = morseTable[i - 0x26];
    }
}