git.ozlabs.org Git - ccan/blob - ccan/endian/test/run.c

   1 #include "endian/endian.h"
   2 #include <stdlib.h>
   3 #include <stddef.h>
   4 #include <tap/tap.h>
   5
   6 int main(int argc, char *argv[])
   7 {
   8         union {
   9                 uint64_t u64;
  10                 unsigned char u64_bytes[8];
  11         } u64;
  12         union {
  13                 uint32_t u32;
  14                 unsigned char u32_bytes[4];
  15         } u32;
  16         union {
  17                 uint16_t u16;
  18                 unsigned char u16_bytes[2];
  19         } u16;
  20
  21         plan_tests(48);
  22
  23         /* Straight swap tests. */
  24         u64.u64_bytes[0] = 0x00;
  25         u64.u64_bytes[1] = 0x11;
  26         u64.u64_bytes[2] = 0x22;
  27         u64.u64_bytes[3] = 0x33;
  28         u64.u64_bytes[4] = 0x44;
  29         u64.u64_bytes[5] = 0x55;
  30         u64.u64_bytes[6] = 0x66;
  31         u64.u64_bytes[7] = 0x77;
  32         u64.u64 = swab_u64(u64.u64);
  33         ok1(u64.u64_bytes[7] == 0x00);
  34         ok1(u64.u64_bytes[6] == 0x11);
  35         ok1(u64.u64_bytes[5] == 0x22);
  36         ok1(u64.u64_bytes[4] == 0x33);
  37         ok1(u64.u64_bytes[3] == 0x44);
  38         ok1(u64.u64_bytes[2] == 0x55);
  39         ok1(u64.u64_bytes[1] == 0x66);
  40         ok1(u64.u64_bytes[0] == 0x77);
  41
  42         u32.u32_bytes[0] = 0x00;
  43         u32.u32_bytes[1] = 0x11;
  44         u32.u32_bytes[2] = 0x22;
  45         u32.u32_bytes[3] = 0x33;
  46         u32.u32 = swab_u32(u32.u32);
  47         ok1(u32.u32_bytes[3] == 0x00);
  48         ok1(u32.u32_bytes[2] == 0x11);
  49         ok1(u32.u32_bytes[1] == 0x22);
  50         ok1(u32.u32_bytes[0] == 0x33);
  51
  52         u16.u16_bytes[0] = 0x00;
  53         u16.u16_bytes[1] = 0x11;
  54         u16.u16 = swab_u16(u16.u16);
  55         ok1(u16.u16_bytes[1] == 0x00);
  56         ok1(u16.u16_bytes[0] == 0x11);
  57
  58         /* Endian tests. */
  59         u64.u64 = cpu_to_le64(0x0011223344556677ULL);
  60         ok1(u64.u64_bytes[0] == 0x77);
  61         ok1(u64.u64_bytes[1] == 0x66);
  62         ok1(u64.u64_bytes[2] == 0x55);
  63         ok1(u64.u64_bytes[3] == 0x44);
  64         ok1(u64.u64_bytes[4] == 0x33);
  65         ok1(u64.u64_bytes[5] == 0x22);
  66         ok1(u64.u64_bytes[6] == 0x11);
  67         ok1(u64.u64_bytes[7] == 0x00);
  68         ok1(le64_to_cpu(u64.u64) == 0x0011223344556677ULL);
  69
  70         u64.u64 = cpu_to_be64(0x0011223344556677ULL);
  71         ok1(u64.u64_bytes[7] == 0x77);
  72         ok1(u64.u64_bytes[6] == 0x66);
  73         ok1(u64.u64_bytes[5] == 0x55);
  74         ok1(u64.u64_bytes[4] == 0x44);
  75         ok1(u64.u64_bytes[3] == 0x33);
  76         ok1(u64.u64_bytes[2] == 0x22);
  77         ok1(u64.u64_bytes[1] == 0x11);
  78         ok1(u64.u64_bytes[0] == 0x00);
  79         ok1(be64_to_cpu(u64.u64) == 0x0011223344556677ULL);
  80
  81         u32.u32 = cpu_to_le32(0x00112233);
  82         ok1(u32.u32_bytes[0] == 0x33);
  83         ok1(u32.u32_bytes[1] == 0x22);
  84         ok1(u32.u32_bytes[2] == 0x11);
  85         ok1(u32.u32_bytes[3] == 0x00);
  86         ok1(le32_to_cpu(u32.u32) == 0x00112233);
  87
  88         u32.u32 = cpu_to_be32(0x00112233);
  89         ok1(u32.u32_bytes[3] == 0x33);
  90         ok1(u32.u32_bytes[2] == 0x22);
  91         ok1(u32.u32_bytes[1] == 0x11);
  92         ok1(u32.u32_bytes[0] == 0x00);
  93         ok1(be32_to_cpu(u32.u32) == 0x00112233);
  94
  95         u16.u16 = cpu_to_le16(0x0011);
  96         ok1(u16.u16_bytes[0] == 0x11);
  97         ok1(u16.u16_bytes[1] == 0x00);
  98         ok1(le16_to_cpu(u16.u16) == 0x0011);
  99
 100         u16.u16 = cpu_to_be16(0x0011);
 101         ok1(u16.u16_bytes[1] == 0x11);
 102         ok1(u16.u16_bytes[0] == 0x00);
 103         ok1(be16_to_cpu(u16.u16) == 0x0011);
 104
 105         exit(exit_status());
 106 }