C-Datatype sizes

filetypes.c

/******************************************************************************
 *
 * file: main.c
 * date: 2015-09-30
 * author: Paul Schaefer
 *
 * Print some datatype sizes
 *
 *****************************************************************************/


#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <sys/types.h>
#include <limits.h>

#define PRINT_SIZE(TYPE)       (printf ("%15s: %2ld bytes\n", #TYPE,\
                                        (unsigned long) sizeof (TYPE)))

int
main (int argc, char *argv[])
{
  (void) argc;
  (void) argv;

  printf ("Basic datatypes\n");

  PRINT_SIZE (short);
  PRINT_SIZE (unsigned short);

  PRINT_SIZE (int);
  PRINT_SIZE (unsigned int);

  PRINT_SIZE (long);
  PRINT_SIZE (unsigned long);

  PRINT_SIZE (double);

  PRINT_SIZE (float);

  printf ("\nExplicit datatypes\n");

  PRINT_SIZE (int8_t);
  PRINT_SIZE (int16_t);
  PRINT_SIZE (int32_t);
  PRINT_SIZE (int64_t);

  PRINT_SIZE (u_int8_t);
  PRINT_SIZE (u_int16_t);
  PRINT_SIZE (u_int32_t);
  PRINT_SIZE (u_int64_t);

  printf ("\nMisc. datatypes\n");

  PRINT_SIZE (size_t);
  PRINT_SIZE (ssize_t);
  PRINT_SIZE (off_t);
  PRINT_SIZE (__WORDSIZE);

  printf ("\nWordsize: %ld bit\n", __WORDSIZE);


  return EXIT_SUCCESS;
}