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git.ipfire.org Git - thirdparty/systemd.git/blob - src/test/test-unaligned.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 #include "memory-util.h"
4 #include "sparse-endian.h"
7 static uint8_t data
[] = {
8 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
9 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
12 static void test_be(void) {
15 assert_se(unaligned_read_be16(&data
[0]) == 0x0001);
16 assert_se(unaligned_read_be16(&data
[1]) == 0x0102);
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);
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);
33 unaligned_write_be16(&scratch
[0], 0x0001);
34 assert_se(memcmp(&scratch
[0], &data
[0], sizeof(uint16_t)) == 0);
36 unaligned_write_be16(&scratch
[1], 0x0102);
37 assert_se(memcmp(&scratch
[1], &data
[1], sizeof(uint16_t)) == 0);
40 unaligned_write_be32(&scratch
[0], 0x00010203);
41 assert_se(memcmp(&scratch
[0], &data
[0], sizeof(uint32_t)) == 0);
43 unaligned_write_be32(&scratch
[1], 0x01020304);
44 assert_se(memcmp(&scratch
[1], &data
[1], sizeof(uint32_t)) == 0);
46 unaligned_write_be32(&scratch
[2], 0x02030405);
47 assert_se(memcmp(&scratch
[2], &data
[2], sizeof(uint32_t)) == 0);
49 unaligned_write_be32(&scratch
[3], 0x03040506);
50 assert_se(memcmp(&scratch
[3], &data
[3], sizeof(uint32_t)) == 0);
53 unaligned_write_be64(&scratch
[0], 0x0001020304050607);
54 assert_se(memcmp(&scratch
[0], &data
[0], sizeof(uint64_t)) == 0);
56 unaligned_write_be64(&scratch
[1], 0x0102030405060708);
57 assert_se(memcmp(&scratch
[1], &data
[1], sizeof(uint64_t)) == 0);
59 unaligned_write_be64(&scratch
[2], 0x0203040506070809);
60 assert_se(memcmp(&scratch
[2], &data
[2], sizeof(uint64_t)) == 0);
62 unaligned_write_be64(&scratch
[3], 0x030405060708090a);
63 assert_se(memcmp(&scratch
[3], &data
[3], sizeof(uint64_t)) == 0);
65 unaligned_write_be64(&scratch
[4], 0x0405060708090a0b);
66 assert_se(memcmp(&scratch
[4], &data
[4], sizeof(uint64_t)) == 0);
68 unaligned_write_be64(&scratch
[5], 0x05060708090a0b0c);
69 assert_se(memcmp(&scratch
[5], &data
[5], sizeof(uint64_t)) == 0);
71 unaligned_write_be64(&scratch
[6], 0x060708090a0b0c0d);
72 assert_se(memcmp(&scratch
[6], &data
[6], sizeof(uint64_t)) == 0);
74 unaligned_write_be64(&scratch
[7], 0x0708090a0b0c0d0e);
75 assert_se(memcmp(&scratch
[7], &data
[7], sizeof(uint64_t)) == 0);
78 static void test_le(void) {
81 assert_se(unaligned_read_le16(&data
[0]) == 0x0100);
82 assert_se(unaligned_read_le16(&data
[1]) == 0x0201);
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);
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);
99 unaligned_write_le16(&scratch
[0], 0x0100);
100 assert_se(memcmp(&scratch
[0], &data
[0], sizeof(uint16_t)) == 0);
102 unaligned_write_le16(&scratch
[1], 0x0201);
103 assert_se(memcmp(&scratch
[1], &data
[1], sizeof(uint16_t)) == 0);
106 unaligned_write_le32(&scratch
[0], 0x03020100);
108 assert_se(memcmp(&scratch
[0], &data
[0], sizeof(uint32_t)) == 0);
110 unaligned_write_le32(&scratch
[1], 0x04030201);
111 assert_se(memcmp(&scratch
[1], &data
[1], sizeof(uint32_t)) == 0);
113 unaligned_write_le32(&scratch
[2], 0x05040302);
114 assert_se(memcmp(&scratch
[2], &data
[2], sizeof(uint32_t)) == 0);
116 unaligned_write_le32(&scratch
[3], 0x06050403);
117 assert_se(memcmp(&scratch
[3], &data
[3], sizeof(uint32_t)) == 0);
120 unaligned_write_le64(&scratch
[0], 0x0706050403020100);
121 assert_se(memcmp(&scratch
[0], &data
[0], sizeof(uint64_t)) == 0);
123 unaligned_write_le64(&scratch
[1], 0x0807060504030201);
124 assert_se(memcmp(&scratch
[1], &data
[1], sizeof(uint64_t)) == 0);
126 unaligned_write_le64(&scratch
[2], 0x0908070605040302);
127 assert_se(memcmp(&scratch
[2], &data
[2], sizeof(uint64_t)) == 0);
129 unaligned_write_le64(&scratch
[3], 0x0a09080706050403);
130 assert_se(memcmp(&scratch
[3], &data
[3], sizeof(uint64_t)) == 0);
132 unaligned_write_le64(&scratch
[4], 0x0B0A090807060504);
133 assert_se(memcmp(&scratch
[4], &data
[4], sizeof(uint64_t)) == 0);
135 unaligned_write_le64(&scratch
[5], 0x0c0b0a0908070605);
136 assert_se(memcmp(&scratch
[5], &data
[5], sizeof(uint64_t)) == 0);
138 unaligned_write_le64(&scratch
[6], 0x0d0c0b0a09080706);
139 assert_se(memcmp(&scratch
[6], &data
[6], sizeof(uint64_t)) == 0);
141 unaligned_write_le64(&scratch
[7], 0x0e0d0c0b0a090807);
142 assert_se(memcmp(&scratch
[7], &data
[7], sizeof(uint64_t)) == 0);
145 static void test_ne(void) {
148 uint64_t z
= 9876543210;
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. */
154 assert_se(unaligned_read_ne16(&x
) == 4711);
155 assert_se(unaligned_read_ne32(&y
) == 123456);
156 assert_se(unaligned_read_ne64(&z
) == 9876543210);
158 unaligned_write_ne16(&x
, 1);
159 unaligned_write_ne32(&y
, 2);
160 unaligned_write_ne64(&z
, 3);
167 int main(int argc
, const char *argv
[]) {