diff options
author | Steven Whitehouse <swhiteho@redhat.com> | 2006-07-03 10:25:08 -0400 |
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committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-07-03 10:25:08 -0400 |
commit | 0a1340c185734a57fbf4775927966ad4a1347b02 (patch) | |
tree | d9ed8f0dd809a7c542a3356601125ea5b5aaa804 /lib/crc32.c | |
parent | af18ddb8864b096e3ed4732e2d4b21c956dcfe3a (diff) | |
parent | 29454dde27d8e340bb1987bad9aa504af7081eba (diff) |
Merge rsync://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
include/linux/kernel.h
Diffstat (limited to 'lib/crc32.c')
-rw-r--r-- | lib/crc32.c | 54 |
1 files changed, 22 insertions, 32 deletions
diff --git a/lib/crc32.c b/lib/crc32.c index 065198f98b3..285fd9bc61b 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -42,20 +42,21 @@ MODULE_AUTHOR("Matt Domsch <Matt_Domsch@dell.com>"); MODULE_DESCRIPTION("Ethernet CRC32 calculations"); MODULE_LICENSE("GPL"); +/** + * crc32_le() - Calculate bitwise little-endian Ethernet AUTODIN II CRC32 + * @crc: seed value for computation. ~0 for Ethernet, sometimes 0 for + * other uses, or the previous crc32 value if computing incrementally. + * @p: pointer to buffer over which CRC is run + * @len: length of buffer @p + */ +u32 __attribute_pure__ crc32_le(u32 crc, unsigned char const *p, size_t len); + #if CRC_LE_BITS == 1 /* * In fact, the table-based code will work in this case, but it can be * simplified by inlining the table in ?: form. */ -/** - * crc32_le() - Calculate bitwise little-endian Ethernet AUTODIN II CRC32 - * @crc - seed value for computation. ~0 for Ethernet, sometimes 0 for - * other uses, or the previous crc32 value if computing incrementally. - * @p - pointer to buffer over which CRC is run - * @len - length of buffer @p - * - */ u32 __attribute_pure__ crc32_le(u32 crc, unsigned char const *p, size_t len) { int i; @@ -68,14 +69,6 @@ u32 __attribute_pure__ crc32_le(u32 crc, unsigned char const *p, size_t len) } #else /* Table-based approach */ -/** - * crc32_le() - Calculate bitwise little-endian Ethernet AUTODIN II CRC32 - * @crc - seed value for computation. ~0 for Ethernet, sometimes 0 for - * other uses, or the previous crc32 value if computing incrementally. - * @p - pointer to buffer over which CRC is run - * @len - length of buffer @p - * - */ u32 __attribute_pure__ crc32_le(u32 crc, unsigned char const *p, size_t len) { # if CRC_LE_BITS == 8 @@ -145,20 +138,21 @@ u32 __attribute_pure__ crc32_le(u32 crc, unsigned char const *p, size_t len) } #endif +/** + * crc32_be() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32 + * @crc: seed value for computation. ~0 for Ethernet, sometimes 0 for + * other uses, or the previous crc32 value if computing incrementally. + * @p: pointer to buffer over which CRC is run + * @len: length of buffer @p + */ +u32 __attribute_pure__ crc32_be(u32 crc, unsigned char const *p, size_t len); + #if CRC_BE_BITS == 1 /* * In fact, the table-based code will work in this case, but it can be * simplified by inlining the table in ?: form. */ -/** - * crc32_be() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32 - * @crc - seed value for computation. ~0 for Ethernet, sometimes 0 for - * other uses, or the previous crc32 value if computing incrementally. - * @p - pointer to buffer over which CRC is run - * @len - length of buffer @p - * - */ u32 __attribute_pure__ crc32_be(u32 crc, unsigned char const *p, size_t len) { int i; @@ -173,14 +167,6 @@ u32 __attribute_pure__ crc32_be(u32 crc, unsigned char const *p, size_t len) } #else /* Table-based approach */ -/** - * crc32_be() - Calculate bitwise big-endian Ethernet AUTODIN II CRC32 - * @crc - seed value for computation. ~0 for Ethernet, sometimes 0 for - * other uses, or the previous crc32 value if computing incrementally. - * @p - pointer to buffer over which CRC is run - * @len - length of buffer @p - * - */ u32 __attribute_pure__ crc32_be(u32 crc, unsigned char const *p, size_t len) { # if CRC_BE_BITS == 8 @@ -249,6 +235,10 @@ u32 __attribute_pure__ crc32_be(u32 crc, unsigned char const *p, size_t len) } #endif +/** + * bitreverse - reverse the order of bits in a u32 value + * @x: value to be bit-reversed + */ u32 bitreverse(u32 x) { x = (x >> 16) | (x << 16); |