/*
 * Copyright (C) 2024 dwlr <dweller@cabin.digital>
 *
 * BSD 3-Clause License (BSD-3-Clause)
 * See LICENSE for details
 */

#define _XOPEN_SOURCE 500

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>


int main(int argc, char** argv)
{
    int   rc  = 0;
    int   ret = EXIT_SUCCESS;
    FILE* in  = stdin;
    FILE* out = stdout;
    const char* name  = "stdin";
    char buffer[4096] = {0};
    size_t got = 0;

    if(argc == 2)
    {
        name = argv[1];
        in = fopen(name, "r");
        if(!in)
        {
            perror("fopen");
            exit(EXIT_FAILURE);
        }

        rc = snprintf(buffer, sizeof(buffer) - 1, "%s.h", name);
        if(rc < 0)
        {
            perror("snprintf");
            exit(EXIT_FAILURE);
        }

        out = fopen(buffer, "w");
        if(!out)
        {
            perror("fopen");
            fclose(in);
            exit(EXIT_FAILURE);
        }

    }
    else if(argc > 2) fprintf(stderr, "warning: ignoring excess paramters\n");

    for(;;)
    {
        size_t i;

        got = fread(buffer, 1, sizeof(buffer), in);
        rc  = ferror(in);
        if(rc)
        {
            perror("fread");
            ret = EXIT_FAILURE;
            goto end;
        }

        for(i = 0; i < got; i++) fprintf(out, "'\\x%02x',", (unsigned char)buffer[i]);

        rc = feof(in);
        if(rc) break;
    }

    fprintf(out, "\n");

end:
    fclose(in);
    fclose(out);
    return ret;
}