/*
    smiley.c
    Jeff Ondich, 24 Jan 2022

    This program demonstrates how to think about the storage
    of a codepoint in UTF-8 as a sequence of bytes.
 */

#include <stdio.h>
#include "bits.h"

#define UTF8_BUFFER_SIZE 5

int main() {
    char buffer[UTF8_BUFFER_SIZE];

    // Put U+1F600 GRINNING FACE, encoded into UTF-8, into the buffer.
    buffer[0] = 0xF0;
    buffer[1] = 0x9F;
    buffer[2] = 0x98;
    buffer[3] = 0x80;

    // This null character isn't part of the UTF-8 encoding.
    // But we put it here (see the "bits and characters" programming
    // assignment) so we can use printf and %s to print the resulting
    // character to the terminal.
    buffer[4] = 0x00;
    
    // Print the hex values of the individual bytes in the encoding.
    printf("The bytes in the UTF-8 encoding:\n");
    for (int k = 0; k < UTF8_BUFFER_SIZE - 1; k++) {
        printf("0x%x\n", (unsigned char)buffer[k]);
    }
    printf("\n");

    // Print the character itself to output by treating the encoded
    // character as a null-terminated char array. Note that if your
    // terminal program doesn't default to UTF-8, you might have to change
    // its settings to see the right output.
    printf("Character: %s\n", buffer);

    // Uncomment if you have from_utf8 available.
    // Print the codepoint, as computed from your from_utf8 function.
    //int codepoint = from_utf8(buffer);
    //printf("Codepoint: 0x%x\n", codepoint);

    return 0;
}