crc sync module.

[ccan] / ccan / crcsync / test / run-crc.c

diff --git a/ccan/crcsync/test/run-crc.c b/ccan/crcsync/test/run-crc.c
new file mode 100644 (file)
index 0000000..0325cce
--- /dev/null
+++ b/ccan/crcsync/test/run-crc.c
@@ -0,0 +1,36 @@
+#include "crcsync/crcsync.h"
+#include "crcsync/crcsync.c"
+#include "tap/tap.h"
+
+int main(int argc, char *argv[])
+{
+       char buffer[1024];
+       unsigned int i, j;
+       uint32_t crcs[12] = { 0xFFFFF, 0xdeadf00d };
+
+       plan_tests(3 + 8192);
+
+       /* Simple test (we know currently crc of 0s is 0) */
+       memset(buffer, 0, sizeof(buffer));
+       crc_of_blocks(buffer, sizeof(buffer), sizeof(buffer), 32, crcs);
+       ok1(crcs[0] == 0);
+       crc_of_blocks(buffer, sizeof(buffer), sizeof(buffer)/2, 32, crcs);
+       ok1(crcs[0] == 0);
+       ok1(crcs[1] == 0);
+
+       /* We know they're using crc32c. */
+       for (i = 0; i < sizeof(buffer); i++) {
+               buffer[i] = i;
+               crc_of_blocks(buffer, sizeof(buffer), sizeof(buffer)/7,
+                             32, crcs);
+               for (j = 0; j < sizeof(buffer); j += sizeof(buffer)/7) {
+                       unsigned int len = sizeof(buffer)/7;
+                       if (j + len > sizeof(buffer))
+                               len = sizeof(buffer) - j;
+                       
+                       ok1(crc32c(0, buffer + j, len) == crcs[j/(sizeof(buffer)/7)]);
+               }
+       }
+
+       return exit_status();
+}