#include "util.h"

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

void fatal(const char *fmt, ...)
{
  va_list args;

  va_start(args, fmt);
  vfprintf(stderr, fmt, args);
  fprintf(stderr, "\n");
  va_end(args);

  exit(EXIT_FAILURE);
}

byte_arr_t *read_file(const char *filepath)
{
  FILE *fp = fopen(filepath, "rb");
  byte_arr_t *arr = NULL;

  if (fp == NULL)
  {
    fprintf(stderr, "%s: ", filepath);
    perror("could not open");
    goto end;
  }

  fseek(fp, 0, SEEK_END);
  const long size = ftell(fp);
  if (size < 0)
  {
    goto end;
  }

  arr = malloc(sizeof *arr + size);
  if (arr == NULL)
  {
    goto end;
  }

  arr->size = size;

  rewind(fp);
  fread(arr->data, 1, size, fp);

end:
  if (fp != NULL)
  {
    fclose(fp);
  }
  return arr;
}