ccan/crc32c: new module for accelerated CRC32 (on x86-64).

[ccan] / ccan / crc32c / test / run-crc32c.c

diff --git a/ccan/crc32c/test/run-crc32c.c b/ccan/crc32c/test/run-crc32c.c
new file mode 100644 (file)
index 0000000..304a3d2
--- /dev/null
+++ b/ccan/crc32c/test/run-crc32c.c
@@ -0,0 +1,111 @@
+/* Test vectors from https://tools.ietf.org/html/rfc3720#appendix-B.4 */
+
+/* Get access to sw version explicitly */
+#include <ccan/crc32c/crc32c.c>
+#include <ccan/tap/tap.h>
+#include <string.h>
+
+#define BSWAP_32(val)                                  \
+       ((((uint32_t)(val) & 0x000000ff) << 24)         \
+        | (((uint32_t)(val) & 0x0000ff00) << 8)                \
+        | (((uint32_t)(val) & 0x00ff0000) >> 8)                \
+        | (((uint32_t)(val) & 0xff000000) >> 24))
+
+#if HAVE_LITTLE_ENDIAN
+#define BE32_TO_CPU(le_val) BSWAP_32((uint32_t)le_val)
+#else
+#define BE32_TO_CPU(le_val) ((uint32_t)(le_val))
+#endif
+
+int main(void)
+{
+       unsigned char m[48];
+
+       plan_tests(5);
+
+       /* 32 bytes of zeroes:
+
+     Byte:        0  1  2  3
+
+        0:       00 00 00 00
+      ...
+       28:       00 00 00 00
+
+      CRC:       aa 36 91 8a
+       */
+
+       memset(m, 0, 32);
+       ok1(crc32c_sw(0, m, 32) == BE32_TO_CPU(0xaa36918a));
+
+       /* 32 bytes of ones:
+
+     Byte:        0  1  2  3
+
+        0:       ff ff ff ff
+      ...
+       28:       ff ff ff ff
+
+      CRC:       43 ab a8 62
+       */
+       memset(m, 0xff, 32);
+       ok1(crc32c_sw(0, m, 32) == BE32_TO_CPU(0x43aba862));
+
+       /* 32 bytes of incrementing 00..1f:
+
+     Byte:        0  1  2  3
+
+        0:       00 01 02 03
+      ...
+       28:       1c 1d 1e 1f
+
+      CRC:       4e 79 dd 46
+       */
+       for (size_t i = 0; i < 32; i++)
+               m[i] = i;
+       ok1(crc32c_sw(0, m, 32) == BE32_TO_CPU(0x4e79dd46));
+
+       /*  32 bytes of decrementing 1f..00:
+
+     Byte:        0  1  2  3
+
+        0:       1f 1e 1d 1c
+      ...
+       28:       03 02 01 00
+
+      CRC:       5c db 3f 11
+       */
+       for (size_t i = 0; i < 32; i++)
+               m[i] = 31 - i;
+       ok1(crc32c_sw(0, m, 32) == BE32_TO_CPU(0x5cdb3f11));
+
+       /*  An iSCSI - SCSI Read (10) Command PDU
+    Byte:        0  1  2  3
+
+       0:       01 c0 00 00
+       4:       00 00 00 00
+       8:       00 00 00 00
+      12:       00 00 00 00
+      16:       14 00 00 00
+      20:       00 00 04 00
+      24:       00 00 00 14
+      28:       00 00 00 18
+      32:       28 00 00 00
+      36:       00 00 00 00
+      40:       02 00 00 00
+      44:       00 00 00 00
+
+     CRC:       56 3a 96 d9
+       */
+       memset(m, 0, sizeof(m));
+       m[0] = 0x01;
+       m[1] = 0xc0;
+       m[16] = 0x14;
+       m[22] = 0x04;
+       m[27] = 0x14;
+       m[31] = 0x18;
+       m[32] = 0x28;
+       m[40] = 0x02;
+       ok1(crc32c_sw(0, m, sizeof(m)) == BE32_TO_CPU(0x563a96d9));
+
+       return exit_status();
+}