src/test/test-unaligned.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "memory-util.h"
   4 #include "sparse-endian.h"
   5 #include "unaligned.h"
   6
   7 static uint8_t data[] = {
   8         0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
   9         0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
  10 };
  11
  12 static void test_be(void) {
  13         uint8_t scratch[16];
  14
  15         assert_se(unaligned_read_be16(&data[0]) == 0x0001);
  16         assert_se(unaligned_read_be16(&data[1]) == 0x0102);
  17
  18         assert_se(unaligned_read_be32(&data[0]) == 0x00010203);
  19         assert_se(unaligned_read_be32(&data[1]) == 0x01020304);
  20         assert_se(unaligned_read_be32(&data[2]) == 0x02030405);
  21         assert_se(unaligned_read_be32(&data[3]) == 0x03040506);
  22
  23         assert_se(unaligned_read_be64(&data[0]) == 0x0001020304050607);
  24         assert_se(unaligned_read_be64(&data[1]) == 0x0102030405060708);
  25         assert_se(unaligned_read_be64(&data[2]) == 0x0203040506070809);
  26         assert_se(unaligned_read_be64(&data[3]) == 0x030405060708090a);
  27         assert_se(unaligned_read_be64(&data[4]) == 0x0405060708090a0b);
  28         assert_se(unaligned_read_be64(&data[5]) == 0x05060708090a0b0c);
  29         assert_se(unaligned_read_be64(&data[6]) == 0x060708090a0b0c0d);
  30         assert_se(unaligned_read_be64(&data[7]) == 0x0708090a0b0c0d0e);
  31
  32         zero(scratch);
  33         unaligned_write_be16(&scratch[0], 0x0001);
  34         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint16_t)) == 0);
  35         zero(scratch);
  36         unaligned_write_be16(&scratch[1], 0x0102);
  37         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint16_t)) == 0);
  38
  39         zero(scratch);
  40         unaligned_write_be32(&scratch[0], 0x00010203);
  41         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint32_t)) == 0);
  42         zero(scratch);
  43         unaligned_write_be32(&scratch[1], 0x01020304);
  44         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint32_t)) == 0);
  45         zero(scratch);
  46         unaligned_write_be32(&scratch[2], 0x02030405);
  47         assert_se(memcmp(&scratch[2], &data[2], sizeof(uint32_t)) == 0);
  48         zero(scratch);
  49         unaligned_write_be32(&scratch[3], 0x03040506);
  50         assert_se(memcmp(&scratch[3], &data[3], sizeof(uint32_t)) == 0);
  51
  52         zero(scratch);
  53         unaligned_write_be64(&scratch[0], 0x0001020304050607);
  54         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint64_t)) == 0);
  55         zero(scratch);
  56         unaligned_write_be64(&scratch[1], 0x0102030405060708);
  57         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint64_t)) == 0);
  58         zero(scratch);
  59         unaligned_write_be64(&scratch[2], 0x0203040506070809);
  60         assert_se(memcmp(&scratch[2], &data[2], sizeof(uint64_t)) == 0);
  61         zero(scratch);
  62         unaligned_write_be64(&scratch[3], 0x030405060708090a);
  63         assert_se(memcmp(&scratch[3], &data[3], sizeof(uint64_t)) == 0);
  64         zero(scratch);
  65         unaligned_write_be64(&scratch[4], 0x0405060708090a0b);
  66         assert_se(memcmp(&scratch[4], &data[4], sizeof(uint64_t)) == 0);
  67         zero(scratch);
  68         unaligned_write_be64(&scratch[5], 0x05060708090a0b0c);
  69         assert_se(memcmp(&scratch[5], &data[5], sizeof(uint64_t)) == 0);
  70         zero(scratch);
  71         unaligned_write_be64(&scratch[6], 0x060708090a0b0c0d);
  72         assert_se(memcmp(&scratch[6], &data[6], sizeof(uint64_t)) == 0);
  73         zero(scratch);
  74         unaligned_write_be64(&scratch[7], 0x0708090a0b0c0d0e);
  75         assert_se(memcmp(&scratch[7], &data[7], sizeof(uint64_t)) == 0);
  76 }
  77
  78 static void test_le(void) {
  79         uint8_t scratch[16];
  80
  81         assert_se(unaligned_read_le16(&data[0]) == 0x0100);
  82         assert_se(unaligned_read_le16(&data[1]) == 0x0201);
  83
  84         assert_se(unaligned_read_le32(&data[0]) == 0x03020100);
  85         assert_se(unaligned_read_le32(&data[1]) == 0x04030201);
  86         assert_se(unaligned_read_le32(&data[2]) == 0x05040302);
  87         assert_se(unaligned_read_le32(&data[3]) == 0x06050403);
  88
  89         assert_se(unaligned_read_le64(&data[0]) == 0x0706050403020100);
  90         assert_se(unaligned_read_le64(&data[1]) == 0x0807060504030201);
  91         assert_se(unaligned_read_le64(&data[2]) == 0x0908070605040302);
  92         assert_se(unaligned_read_le64(&data[3]) == 0x0a09080706050403);
  93         assert_se(unaligned_read_le64(&data[4]) == 0x0b0a090807060504);
  94         assert_se(unaligned_read_le64(&data[5]) == 0x0c0b0a0908070605);
  95         assert_se(unaligned_read_le64(&data[6]) == 0x0d0c0b0a09080706);
  96         assert_se(unaligned_read_le64(&data[7]) == 0x0e0d0c0b0a090807);
  97
  98         zero(scratch);
  99         unaligned_write_le16(&scratch[0], 0x0100);
 100         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint16_t)) == 0);
 101         zero(scratch);
 102         unaligned_write_le16(&scratch[1], 0x0201);
 103         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint16_t)) == 0);
 104
 105         zero(scratch);
 106         unaligned_write_le32(&scratch[0], 0x03020100);
 107
 108         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint32_t)) == 0);
 109         zero(scratch);
 110         unaligned_write_le32(&scratch[1], 0x04030201);
 111         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint32_t)) == 0);
 112         zero(scratch);
 113         unaligned_write_le32(&scratch[2], 0x05040302);
 114         assert_se(memcmp(&scratch[2], &data[2], sizeof(uint32_t)) == 0);
 115         zero(scratch);
 116         unaligned_write_le32(&scratch[3], 0x06050403);
 117         assert_se(memcmp(&scratch[3], &data[3], sizeof(uint32_t)) == 0);
 118
 119         zero(scratch);
 120         unaligned_write_le64(&scratch[0], 0x0706050403020100);
 121         assert_se(memcmp(&scratch[0], &data[0], sizeof(uint64_t)) == 0);
 122         zero(scratch);
 123         unaligned_write_le64(&scratch[1], 0x0807060504030201);
 124         assert_se(memcmp(&scratch[1], &data[1], sizeof(uint64_t)) == 0);
 125         zero(scratch);
 126         unaligned_write_le64(&scratch[2], 0x0908070605040302);
 127         assert_se(memcmp(&scratch[2], &data[2], sizeof(uint64_t)) == 0);
 128         zero(scratch);
 129         unaligned_write_le64(&scratch[3], 0x0a09080706050403);
 130         assert_se(memcmp(&scratch[3], &data[3], sizeof(uint64_t)) == 0);
 131         zero(scratch);
 132         unaligned_write_le64(&scratch[4], 0x0B0A090807060504);
 133         assert_se(memcmp(&scratch[4], &data[4], sizeof(uint64_t)) == 0);
 134         zero(scratch);
 135         unaligned_write_le64(&scratch[5], 0x0c0b0a0908070605);
 136         assert_se(memcmp(&scratch[5], &data[5], sizeof(uint64_t)) == 0);
 137         zero(scratch);
 138         unaligned_write_le64(&scratch[6], 0x0d0c0b0a09080706);
 139         assert_se(memcmp(&scratch[6], &data[6], sizeof(uint64_t)) == 0);
 140         zero(scratch);
 141         unaligned_write_le64(&scratch[7], 0x0e0d0c0b0a090807);
 142         assert_se(memcmp(&scratch[7], &data[7], sizeof(uint64_t)) == 0);
 143 }
 144
 145 static void test_ne(void) {
 146         uint16_t x = 4711;
 147         uint32_t y = 123456;
 148         uint64_t z = 9876543210;
 149
 150         /* Note that we don't bother actually testing alignment issues in this function, after all the _ne() functions
 151          * are just aliases for the _le() or _be() implementations, which we test extensively above. Hence, in this
 152          * function, just ensure that they map to the right version on the local architecture. */
 153
 154         assert_se(unaligned_read_ne16(&x) == 4711);
 155         assert_se(unaligned_read_ne32(&y) == 123456);
 156         assert_se(unaligned_read_ne64(&z) == 9876543210);
 157
 158         unaligned_write_ne16(&x, 1);
 159         unaligned_write_ne32(&y, 2);
 160         unaligned_write_ne64(&z, 3);
 161
 162         assert_se(x == 1);
 163         assert_se(y == 2);
 164         assert_se(z == 3);
 165 }
 166
 167 int main(int argc, const char *argv[]) {
 168         test_be();
 169         test_le();
 170         test_ne();
 171         return 0;
 172 }