+/* Licensed under GPLv2+ - see LICENSE file for details */
#ifndef CCAN_CRC_H
#define CCAN_CRC_H
#include <stdint.h>
* 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++;
* }
*
* 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();
* }
*/
* 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 */