Daily programmer #171 attempt

dp_171.c

#include <string.h>

static const char encoding[] = {
    0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,
    0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xA,
    0,0,0,0,0,0,0,
    0xB, 0xC, 0xD, 0xE, 0xF, 0x10, 0x11, 0x12, 0x13,
    0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B,
    0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24
};

static const char r_encoding[] = {
    ' ','0','1','2','3','4','5','6','7','8','9',
    'A','B','C','D','E','F','G','H','I','J','K',
    'L','M','N','O','P','Q','R','S','T','U','V',
    'W','X','Y','Z'
};

static const char *tests[] = {
    "REMEMBER TO DRINK YOUR OVALTINE",
    "GIANTS BEAT DODGERS 10 TO 9 AND PLAY TOMORROW AT 1300 ",
    "SPACE THE FINAL FRONTIER THESE ARE THE VOYAGES OF THE BIT STREAM DAILY PROGRAMMER TO SEEK OUT NEW COMPRESSION"
};

struct encoded {
    const unsigned int character : 6;
} __attribute__((__packed__));

void encode(const char *msg, const size_t siz, struct encoded *encoded_msg) {
    int j;
    for (j = 0; j < siz; j++) {
        const unsigned int encoded_char = encoding[msg[j]];
        struct encoded _stack = {
            .character = encoded_char,
        };
        memcpy(&encoded_msg[j], &_stack, sizeof(struct encoded));
    }
}

char *decode(const struct encoded *encoded_msg) {
    return NULL;
}

int main(const int argc, char *argv[]) {
    int i;
    for (i = 0; i < (sizeof(tests)/sizeof(tests[0])); i++) {
        const char *current_test = tests[i];
        const size_t test_siz = strlen(current_test);

        struct encoded encoded_msg[test_siz];
        encode(current_test, test_siz, encoded_msg);
    }

    return 0;
}