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 "sparse-endian.h"
  22 #include "util.h"
  23
  24 static uint8_t data[] = {
  25         0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  26         0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  27 };
  28
  29 int main(int argc, const char *argv[]) {
  30         uint8_t scratch[16];
  31
  32         assert_se(unaligned_read_be16(&data[0]) == 0x0001);
  33         assert_se(unaligned_read_be16(&data[1]) == 0x0102);
  34
  35         assert_se(unaligned_read_be32(&data[0]) == 0x00010203);
  36         assert_se(unaligned_read_be32(&data[1]) == 0x01020304);
  37         assert_se(unaligned_read_be32(&data[2]) == 0x02030405);
  38         assert_se(unaligned_read_be32(&data[3]) == 0x03040506);
  39
  40         assert_se(unaligned_read_be64(&data[0]) == 0x0001020304050607);
  41         assert_se(unaligned_read_be64(&data[1]) == 0x0102030405060708);
  42         assert_se(unaligned_read_be64(&data[2]) == 0x0203040506070809);
  43         assert_se(unaligned_read_be64(&data[3]) == 0x030405060708090a);
  44         assert_se(unaligned_read_be64(&data[4]) == 0x0405060708090a0b);
  45         assert_se(unaligned_read_be64(&data[5]) == 0x05060708090a0b0c);
  46         assert_se(unaligned_read_be64(&data[6]) == 0x060708090a0b0c0d);
  47         assert_se(unaligned_read_be64(&data[7]) == 0x0708090a0b0c0d0e);
  48
  49         zero(scratch);
  50         unaligned_write_be16(&scratch[0], 0x0001);
  51         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint16_t)) == 0);
  52         zero(scratch);
  53         unaligned_write_be16(&scratch[1], 0x0102);
  54         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint16_t)) == 0);
  55
  56         zero(scratch);
  57         unaligned_write_be32(&scratch[0], 0x00010203);
  58         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint32_t)) == 0);
  59         zero(scratch);
  60         unaligned_write_be32(&scratch[1], 0x01020304);
  61         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint32_t)) == 0);
  62         zero(scratch);
  63         unaligned_write_be32(&scratch[2], 0x02030405);
  64         assert_se(memcmp(&scratch[2], &data[2], sizeof(uint32_t)) == 0);
  65         zero(scratch);
  66         unaligned_write_be32(&scratch[3], 0x03040506);
  67         assert_se(memcmp(&scratch[3], &data[3], sizeof(uint32_t)) == 0);
  68
  69         zero(scratch);
  70         unaligned_write_be64(&scratch[0], 0x0001020304050607);
  71         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint64_t)) == 0);
  72         zero(scratch);
  73         unaligned_write_be64(&scratch[1], 0x0102030405060708);
  74         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint64_t)) == 0);
  75         zero(scratch);
  76         unaligned_write_be64(&scratch[2], 0x0203040506070809);
  77         assert_se(memcmp(&scratch[2], &data[2], sizeof(uint64_t)) == 0);
  78         zero(scratch);
  79         unaligned_write_be64(&scratch[3], 0x030405060708090a);
  80         assert_se(memcmp(&scratch[3], &data[3], sizeof(uint64_t)) == 0);
  81         zero(scratch);
  82         unaligned_write_be64(&scratch[4], 0x0405060708090a0b);
  83         assert_se(memcmp(&scratch[4], &data[4], sizeof(uint64_t)) == 0);
  84         zero(scratch);
  85         unaligned_write_be64(&scratch[5], 0x05060708090a0b0c);
  86         assert_se(memcmp(&scratch[5], &data[5], sizeof(uint64_t)) == 0);
  87         zero(scratch);
  88         unaligned_write_be64(&scratch[6], 0x060708090a0b0c0d);
  89         assert_se(memcmp(&scratch[6], &data[6], sizeof(uint64_t)) == 0);
  90         zero(scratch);
  91         unaligned_write_be64(&scratch[7], 0x0708090a0b0c0d0e);
  92         assert_se(memcmp(&scratch[7], &data[7], sizeof(uint64_t)) == 0);
  93 }