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/* * crc32.h * See linux/lib/crc32.c for license and changes */ #ifndef _LINUX_CRC32_H #define _LINUX_CRC32_H #include <linux/types.h> #include <linux/bitrev.h> extern u32 crc32_le(u32 crc, unsigned char const *p, size_t len); extern u32 crc32_be(u32 crc, unsigned char const *p, size_t len); extern u32 __crc32c_le(u32 crc, unsigned char const *p, size_t len); #define crc32(seed, data, length) crc32_le(seed, (unsigned char const *)(data), length) /* * Helpers for hash table generation of ethernet nics: * * Ethernet sends the least significant bit of a byte first, thus crc32_le * is used. The output of crc32_le is bit reversed [most significant bit * is in bit nr 0], thus it must be reversed before use. Except for * nics that bit swap the result internally... */ #define ether_crc(length, data) bitrev32(crc32_le(~0, data, length)) #define ether_crc_le(length, data) crc32_le(~0, data, length) #endif /* _LINUX_CRC32_H */