X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;ds=sidebyside;f=ccan%2Fcrc%2Fcrc.h;h=ba9f039c2958f8dc8eb358eade94069d340144ea;hb=39b46a02b7199786e926dfcb4086544789e30a68;hp=16994fc397597be61e550b755647734e34fd4ee4;hpb=96b6d6f132aeec31adc0dfd0836f67e052694ac7;p=ccan

diff --git a/ccan/crc/crc.h b/ccan/crc/crc.h
index 16994fc3..ba9f039c 100644
--- a/ccan/crc/crc.h
+++ b/ccan/crc/crc.h
@@ -1,15 +1,51 @@
+/* Licensed under GPLv2+ - see LICENSE file for details */
 #ifndef CCAN_CRC_H
 #define CCAN_CRC_H
 #include <stdint.h>
 #include <stdlib.h>
 
+/* Note: the crc32c function has been *fixed* (it gave wrong results!) and
+ * moved to the ccan/crc32c module.  You probably want that if you're
+ * just after a "good" crc function. */
+
 /**
- * crc32 - 32 bit crc of string of bytes
+ * crc32_ieee - IEEE 802.3 32 bit crc of string of bytes
+ * @start_crc: the initial crc (usually 0)
  * @buf: pointer to bytes
  * @size: length of buffer
  *
  * 32 bit CRC checksum using polynomial
  * X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0.
+ *
+ * See crc32c() for details.
+ */
+uint32_t crc32_ieee(uint32_t start_crc, const void *buf, size_t size);
+
+/**
+ * crc32_ieee_table - Get the IEEE 802.3 CRC table
+ *
+ * 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.
  */
-uint32_t crc32(const void *buf, size_t size);
+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 */