X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fcrc%2Fcrc.h;h=6338000e23d937e5628f7a8191ceaf8d2e38a17c;hp=24511993db81ef9c71f4670dcf6f9b3ab7fb6673;hb=cbd27e92c3e00e004b50ac998d131e52ac1290ea;hpb=456d13116b61c1a9fa2ace8816dbbe9b759ac9e2

diff --git a/ccan/crc/crc.h b/ccan/crc/crc.h
index 24511993..6338000e 100644
--- a/ccan/crc/crc.h
+++ b/ccan/crc/crc.h
@@ -29,11 +29,13 @@
  * as 0 the first time, and the current crc result from then on.
  *
  * Example:
+ *	#include <sys/uio.h>
+ *	...
  *	// Check that iovec has the crc we expect (Castagnoli version)
- *	bool check_crc(uint32_t expected, const struct iovec *iov, int iovcnt)
+ *	static bool check_crc(uint32_t expected, const struct iovec *iov, int l)
  *	{
  *		uint32_t crc = 0;
- *		while (iovcnt >= 0) {
+ *		while (l >= 0) {
  *			crc = crc32c(crc, iov->iov_base, iov->iov_len);
  *			iov++;
  *		}
@@ -52,10 +54,10 @@ uint32_t crc32c(uint32_t start_crc, const void *buf, size_t size);
  *
  * Example:
  *	// This dumb code only handles Castagnoli, so assert that here.
- *	void check_user_crc_table(const uint32_t *usertab)
+ *	static void check_user_crc_table(const uint32_t *usertab)
  *	{
  *		const uint32_t *ctab = crc32c_table();
- *		if (!ieee_tab || memcmp(ieee_tab, usertab, 1024) != 0)
+ *		if (!ctab || memcmp(ctab, usertab, 1024) != 0)
  *			abort();
  *	}
  */
@@ -80,4 +82,25 @@ uint32_t crc32_ieee(uint32_t start_crc, const void *buf, size_t size);
  * See crc32c_table() for details.
  */
 const uint32_t *crc32_ieee_table(void);
+
+/**
+ * crc64_iso - ISO 3309
+ * @start_crc: the initial crc (usually 0)
+ * @buf: pointer to bytes
+ * @size: length of buffer
+ *
+ * 64 bit CRC checksum using polynomial
+ * X^64 + X^4 + X^3 + X^1 + X^0
+ *
+ * See crc32c() for details.
+ */
+uint64_t crc64_iso(uint64_t start_crc, const void *buf, size_t size);
+
+/**
+ * crc64_iso_table - Get the ISO 3309 CRC table
+ *
+ * See crc32c_table() for details.
+ */
+const uint64_t *crc64_iso_table(void);
+
 #endif /* CCAN_CRC_H */