c-byteswap-test.c

// $ gcc --pedantic c-byteswap-test.c -o c-byteswap-test && ./c-byteswap-test
#include <byteswap.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <inttypes.h>
#include <assert.h>


int main (void) {
  fprintf (stdout, "----  int16_t  ----\n");
  {
  int16_t a  = 0;
  int16_t b  = 0;
  int16_t a_r = 0;
  int16_t b_r = 0;
  a = 0xbeef;
  b = 0xefbe;
  a_r = bswap_16 (a);
  b_r = bswap_16 (b);

  //fprintf (stdout, "print format: " PRIx16 "\n");

  fprintf (stdout,
          "a: \t 0x%" PRIx16 "(%"PRIu16") \t b: \t 0x%" PRIx16 "(%"PRIu16")\n"
          "b_r: \t 0x%" PRIx16"(%"PRIu16") \t a_r: \t 0x%" PRIx16 "(%"PRIu16")\n",
          a, a, b, b,
          b_r, b_r, a_r, a_r);
  assert (b == a_r);
  assert (a == b_r);
  }
  fprintf (stdout, "----  uint16_t  ----\n");
  {
  uint16_t a  = 0;
  uint16_t b  = 0;
  uint16_t a_r = 0;
  uint16_t b_r = 0;
  a =  0xbeef;
  b =  0xefbe;
  a_r = bswap_16 (a);
  b_r = bswap_16 (b);

  //fprintf (stdout, "print format: " PRIx16 "\n");

  fprintf (stdout,
          "a: \t 0x%" PRIx16 "(%"PRIi16") \t b: \t 0x%" PRIx16 "(%"PRIi16")\n"
          "b_r: \t 0x%" PRIx16"(%"PRIi16") \t a_r: \t 0x%" PRIx16 "(%"PRIi16")\n",
          a, a, b, b,
          b_r, b_r, a_r, a_r);
  assert (b == a_r);
  assert (a == b_r);
  }

  fprintf (stdout, "----  int32_t  ----\n");
  {
  int32_t a  = 0;
  int32_t b  = 0;
  int32_t a_r = 0;
  int32_t b_r = 0;
  a = 0xdeadbeef;
  b = 0xefbeadde;
  a_r = bswap_32 (a);
  b_r = bswap_32 (b);

  // fprintf (stdout, "print format: " PRIx32 "\n");

  fprintf (stdout,
          "a: \t 0x%" PRIx32 "(%"PRIi32") \t b: \t 0x%" PRIx32 "(%"PRIi32")\n"
          "b_r: \t 0x%" PRIx32"(%"PRIi32") \t a_r: \t 0x%" PRIx32 "(%"PRIi32")\n",
          a, a, b, b,
          b_r, b_r, a_r, a_r);
  assert (b == a_r);
  assert (a == b_r);
  }
  fprintf (stdout, "----  uint32_t  ----\n");
  {
  uint32_t a  = 0;
  uint32_t b  = 0;
  uint32_t a_r = 0;
  uint32_t b_r = 0;
  a =  0xdeadbeef;
  b =  0xefbeadde;
  a_r = bswap_32 (a);
  b_r = bswap_32 (b);

  // fprintf (stdout, "print format: " PRIx32 "\n");

  fprintf (stdout,
          "a: \t 0x%" PRIx32 "(%"PRIi32") \t b: \t 0x%" PRIx32 "(%"PRIi32")\n"
          "b_r: \t 0x%" PRIx32"(%"PRIi32") \t a_r: \t 0x%" PRIx32 "(%"PRIi32")\n",
          a, a, b, b,
          b_r, b_r, a_r, a_r);
  assert (b == a_r);
  assert (a == b_r);
  }

  fprintf (stdout, "----  int64_t  ----\n");
  {
  int64_t a  = 0;
  int64_t b  = 0;
  int64_t a_r = 0;
  int64_t b_r = 0;
  a = 0xdeadbeefdeadbeef;
  b = 0xefbeaddeefbeadde;
  a_r = bswap_64 (a);
  b_r = bswap_64 (b);

  // fprintf (stdout, "print format: " PRIx64 "\n");

  fprintf (stdout,
          "a: \t 0x%" PRIx64 "(%"PRIi64") \t b: \t 0x%" PRIx64 "(%"PRIi64")\n"
          "b_r: \t 0x%" PRIx64"(%"PRIi64") \t a_r: \t 0x%" PRIx64 "(%"PRIi64")\n",
          a, a, b, b,
          b_r, b_r, a_r, a_r);
  assert (b == a_r);
  assert (a == b_r);
  }
  fprintf (stdout, "----  uint64_t  ----\n");
  {
  uint64_t a  = 0;
  uint64_t b  = 0;
  uint64_t a_r = 0;
  uint64_t b_r = 0;
  a =  0xdeadbeefdeadbeef;
  b =  0xefbeaddeefbeadde;
  a_r = bswap_64 (a);
  b_r = bswap_64 (b);

  // fprintf (stdout, "print format: " PRIx64 "\n");

  fprintf (stdout,
          "a: \t 0x%" PRIx64 "(%"PRIu64") \t b: \t 0x%" PRIx64 "(%"PRIu64")\n"
          "b_r: \t 0x%" PRIx64"(%"PRIu64") \t a_r: \t 0x%" PRIx64 "(%"PRIu64")\n",
          a, a, b, b,
          b_r, b_r, a_r, a_r);
  assert (b == a_r);
  assert (a == b_r);
  }
  return 0;
}