src/test/test-unaligned.c

   1 /***
   2   This file is part of systemd
   3
   4   Copyright 2014 Tom Gundersen
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "unaligned.h"
  21 #include "util.h"
  22
  23 static uint8_t data[] = {
  24         0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  25         0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  26 };
  27
  28 int main(int argc, const char *argv[]) {
  29         uint8_t scratch[16];
  30
  31         assert_se(unaligned_read_be16((be16_t*)&data[0]) == 0x0001);
  32         assert_se(unaligned_read_be16((be16_t*)&data[1]) == 0x0102);
  33
  34         assert_se(unaligned_read_be32((be32_t*)&data[0]) == 0x00010203);
  35         assert_se(unaligned_read_be32((be32_t*)&data[1]) == 0x01020304);
  36         assert_se(unaligned_read_be32((be32_t*)&data[2]) == 0x02030405);
  37         assert_se(unaligned_read_be32((be32_t*)&data[3]) == 0x03040506);
  38
  39         assert_se(unaligned_read_be64((be64_t*)&data[0]) == 0x0001020304050607);
  40         assert_se(unaligned_read_be64((be64_t*)&data[1]) == 0x0102030405060708);
  41         assert_se(unaligned_read_be64((be64_t*)&data[2]) == 0x0203040506070809);
  42         assert_se(unaligned_read_be64((be64_t*)&data[3]) == 0x030405060708090a);
  43         assert_se(unaligned_read_be64((be64_t*)&data[4]) == 0x0405060708090a0b);
  44         assert_se(unaligned_read_be64((be64_t*)&data[5]) == 0x05060708090a0b0c);
  45         assert_se(unaligned_read_be64((be64_t*)&data[6]) == 0x060708090a0b0c0d);
  46         assert_se(unaligned_read_be64((be64_t*)&data[7]) == 0x0708090a0b0c0d0e);
  47
  48         zero(scratch);
  49         unaligned_write_be16((uint16_t*)&scratch[0], 0x0001);
  50         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint16_t)) == 0);
  51         zero(scratch);
  52         unaligned_write_be16((uint16_t*)&scratch[1], 0x0102);
  53         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint16_t)) == 0);
  54
  55         zero(scratch);
  56         unaligned_write_be32((be32_t*)&scratch[0], 0x00010203);
  57         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint32_t)) == 0);
  58         zero(scratch);
  59         unaligned_write_be32((be32_t*)&scratch[1], 0x01020304);
  60         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint32_t)) == 0);
  61         zero(scratch);
  62         unaligned_write_be32((be32_t*)&scratch[2], 0x02030405);
  63         assert_se(memcmp(&scratch[2], &data[2], sizeof(uint32_t)) == 0);
  64         zero(scratch);
  65         unaligned_write_be32((be32_t*)&scratch[3], 0x03040506);
  66         assert_se(memcmp(&scratch[3], &data[3], sizeof(uint32_t)) == 0);
  67
  68         zero(scratch);
  69         unaligned_write_be64((be64_t*)&scratch[0], 0x0001020304050607);
  70         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint64_t)) == 0);
  71         zero(scratch);
  72         unaligned_write_be64((be64_t*)&scratch[1], 0x0102030405060708);
  73         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint64_t)) == 0);
  74         zero(scratch);
  75         unaligned_write_be64((be64_t*)&scratch[2], 0x0203040506070809);
  76         assert_se(memcmp(&scratch[2], &data[2], sizeof(uint64_t)) == 0);
  77         zero(scratch);
  78         unaligned_write_be64((be64_t*)&scratch[3], 0x030405060708090a);
  79         assert_se(memcmp(&scratch[3], &data[3], sizeof(uint64_t)) == 0);
  80         zero(scratch);
  81         unaligned_write_be64((be64_t*)&scratch[4], 0x0405060708090a0b);
  82         assert_se(memcmp(&scratch[4], &data[4], sizeof(uint64_t)) == 0);
  83         zero(scratch);
  84         unaligned_write_be64((be64_t*)&scratch[5], 0x05060708090a0b0c);
  85         assert_se(memcmp(&scratch[5], &data[5], sizeof(uint64_t)) == 0);
  86         zero(scratch);
  87         unaligned_write_be64((be64_t*)&scratch[6], 0x060708090a0b0c0d);
  88         assert_se(memcmp(&scratch[6], &data[6], sizeof(uint64_t)) == 0);
  89         zero(scratch);
  90         unaligned_write_be64((be64_t*)&scratch[7], 0x0708090a0b0c0d0e);
  91         assert_se(memcmp(&scratch[7], &data[7], sizeof(uint64_t)) == 0);
  92 }