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comparison crc32-test.c @ 0:422835bc1aca

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*: checkin
author Paper <paper@tflc.us>
date Mon, 09 Feb 2026 01:15:00 -0500
parents
children 90cb48b87dcc
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-1:000000000000 0:422835bc1aca
1 #include "crc32i.h"
2 #include <stdio.h>
3
4 /* Test implementations and make sure they agree with each other */
5 int crc32_test(void)
6 {
7 /* Force alignment :) */
8 static const __attribute__((__aligned__(CRC32_MAX_ALIGNMENT))) unsigned char testdata[1024] =
9 #define DOUBLE(x) x x
10 DOUBLE(DOUBLE(DOUBLE(DOUBLE(DOUBLE(DOUBLE(DOUBLE("\x01\x02\x04\x08\x10\x20\x40\x80")))))))
11 #undef DOUBLE
12 ;
13 static const crc32_r_spec crc[] = {
14 crc32c_r,
15 crc32qw_r,
16 crc32x86_vpclmulqdq_r
17 };
18 size_t i;
19
20 uint32_t crcc = crc32(testdata, sizeof(testdata));
21
22 for (i = 0; i < ARRAY_SIZE(crc); i++) {
23 uint32_t thiscrc = ~crc[i](0xFFFFFFFF, testdata, sizeof(testdata));
24
25 if (thiscrc != crcc) {
26 fprintf(stderr, "%zu, mismatch: %08x, %08x\n", i, crcc, thiscrc);
27 return -1;
28 }
29 }
30
31 return 0;
32 }
33
34 int main(void)
35 {
36 return -crc32_test();
37 }