/*
 * This is bin2c program, which allows you to convert binary file to
 * C language array, for use as embedded resource, for instance you
 * can embed graphics or audio file directly into your program.
 * This is public domain software, use it on your own risk.
 * Contact Serge Fukanchik at fuxx@mail.ru if you have any questions.
 *
 * Some modifications were made by
 * Gwilym Kuiper (kuiper.gwilym@gmail.com)
 * I have decided not to change the licence.
 */

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int
main (int argc, char *argv[])
{
    char *buf;
    char *ident;
    unsigned int i, file_size, need_comma;

    FILE *f_input, *f_output;

    if (argc < 4)
    {
        fprintf (stderr,
                 "Usage: %s INPUT OUTPUT ARRAY_NAME [ATTRIBUTE]\n",
                 argv[0]);
        return -1;
    }

    f_input = fopen (argv[1], "rb");
    if (f_input == NULL)
    {
        fprintf (stderr, "can't open %s for reading\n", argv[1]);
        return -1;
    }

    // Get the file length
    fseek (f_input, 0, SEEK_END);
    file_size = ftell (f_input);
    fseek (f_input, 0, SEEK_SET);

    buf = (char *) malloc (file_size);
    assert (buf);

    fread (buf, file_size, 1, f_input);
    fclose (f_input);

    f_output = fopen (argv[2], "w");
    if (f_output == NULL)
    {
        fprintf (stderr, "can't open %s for writing\n", argv[2]);
        return -1;
    }

    ident = argv[3];

    need_comma = 0;

    fprintf (f_output, "unsigned char %s[] %s = {",
             ident, argc >= 5 ? argv[4] : "");
    for (i = 0; i < file_size; ++i)
    {
        if (need_comma)
            fprintf (f_output, ", ");
        else
            need_comma = 1;
        if ((i % 11) == 0)
            fprintf (f_output, "\n  ");
        fprintf (f_output, "0x%.2x", buf[i] & 0xff);
    }
    fprintf (f_output, "\n};\n\n");

    fprintf (f_output,
             "unsigned int %s_len = %i;\n", ident, file_size);

    fclose (f_output);

    return 0;
}