[stgt] [PATCH 1/8] move libcrc32c to the common place
FUJITA Tomonori
fujita.tomonori at lab.ntt.co.jp
Sun Oct 12 06:38:46 CEST 2008
This moves libcrc32c to the common place from iscsi.
Signed-off-by: FUJITA Tomonori <fujita.tomonori at lab.ntt.co.jp>
---
usr/Makefile | 4 +-
usr/crc32c.h | 12 +++
usr/iscsi/crc32c.h | 12 ---
usr/iscsi/libcrc32c.c | 188 -------------------------------------------------
usr/libcrc32c.c | 188 +++++++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 202 insertions(+), 202 deletions(-)
create mode 100644 usr/crc32c.h
delete mode 100644 usr/iscsi/crc32c.h
delete mode 100644 usr/iscsi/libcrc32c.c
create mode 100644 usr/libcrc32c.c
diff --git a/usr/Makefile b/usr/Makefile
index 98845a2..1174f7e 100644
--- a/usr/Makefile
+++ b/usr/Makefile
@@ -10,7 +10,7 @@ ifneq ($(ISCSI),)
CFLAGS += -DISCSI
TGTD_OBJS += $(addprefix iscsi/, conn.o param.o session.o \
iscsid.o target.o chap.o transport.o iscsi_tcp.o \
- isns.o libcrc32c.o)
+ isns.o)
TGTD_OBJS += bs_rdwr.o bs_aio.o
LIBS += -lcrypto
@@ -58,7 +58,7 @@ PROGRAMS += tgtd tgtadm mktape dump_tape
SCRIPTS += ../scripts/tgt-setup-lun ../scripts/tgt-admin
TGTD_OBJS += tgtd.o mgmt.o target.o scsi.o log.o driver.o util.o work.o \
parser.o spc.o sbc.o mmc.o osd.o scc.o smc.o ssc.o bs_ssc.o \
- bs_null.o bs.o
+ bs_null.o bs.o libcrc32c.o
MANPAGES = ../doc/manpages/tgtadm.8 ../doc/manpages/tgt-admin.8 \
../doc/manpages/tgt-setup-lun.8
diff --git a/usr/crc32c.h b/usr/crc32c.h
new file mode 100644
index 0000000..ab271fd
--- /dev/null
+++ b/usr/crc32c.h
@@ -0,0 +1,12 @@
+#ifndef _LINUX_CRC32C_H
+#define _LINUX_CRC32C_H
+
+#include <stdlib.h>
+#include <stdint.h>
+
+extern uint32_t crc32c_le(uint32_t crc, unsigned char const *address, size_t length);
+extern uint32_t crc32c_be(uint32_t crc, unsigned char const *address, size_t length);
+
+#define crc32c(seed, data, length) crc32c_le(seed, (unsigned char const *)data, length)
+
+#endif /* _LINUX_CRC32C_H */
diff --git a/usr/iscsi/crc32c.h b/usr/iscsi/crc32c.h
deleted file mode 100644
index ab271fd..0000000
--- a/usr/iscsi/crc32c.h
+++ /dev/null
@@ -1,12 +0,0 @@
-#ifndef _LINUX_CRC32C_H
-#define _LINUX_CRC32C_H
-
-#include <stdlib.h>
-#include <stdint.h>
-
-extern uint32_t crc32c_le(uint32_t crc, unsigned char const *address, size_t length);
-extern uint32_t crc32c_be(uint32_t crc, unsigned char const *address, size_t length);
-
-#define crc32c(seed, data, length) crc32c_le(seed, (unsigned char const *)data, length)
-
-#endif /* _LINUX_CRC32C_H */
diff --git a/usr/iscsi/libcrc32c.c b/usr/iscsi/libcrc32c.c
deleted file mode 100644
index bda0020..0000000
--- a/usr/iscsi/libcrc32c.c
+++ /dev/null
@@ -1,188 +0,0 @@
-/*
- * CRC32C
- *@Article{castagnoli-crc,
- * author = { Guy Castagnoli and Stefan Braeuer and Martin Herrman},
- * title = {{Optimization of Cyclic Redundancy-Check Codes with 24
- * and 32 Parity Bits}},
- * journal = IEEE Transactions on Communication,
- * year = {1993},
- * volume = {41},
- * number = {6},
- * pages = {},
- * month = {June},
- *}
- * Used by the iSCSI driver, possibly others, and derived from the
- * the iscsi-crc.c module of the linux-iscsi driver at
- * http://linux-iscsi.sourceforge.net.
- *
- * Following the example of lib/crc32, this function is intended to be
- * flexible and useful for all users. Modules that currently have their
- * own crc32c, but hopefully may be able to use this one are:
- * net/sctp (please add all your doco to here if you change to
- * use this one!)
- * <endoflist>
- *
- * Copyright (c) 2004 Cisco Systems, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- */
-#include "crc32c.h"
-#include <asm/byteorder.h>
-
-/*
- * MODULE_AUTHOR("Clay Haapala <chaapala at cisco.com>");
- * MODULE_DESCRIPTION("CRC32c (Castagnoli) calculations");
- * MODULE_LICENSE("GPL");
-*/
-
-#define CRC32C_POLY_BE 0x1EDC6F41
-#define CRC32C_POLY_LE 0x82F63B78
-
-#ifndef CRC_LE_BITS
-# define CRC_LE_BITS 8
-#endif
-
-/*
- * Haven't generated a big-endian table yet, but the bit-wise version
- * should at least work.
- */
-#if defined CRC_BE_BITS && CRC_BE_BITS != 1
-#undef CRC_BE_BITS
-#endif
-#ifndef CRC_BE_BITS
-# define CRC_BE_BITS 1
-#endif
-
-#if CRC_LE_BITS == 1
-/*
- * Compute things bit-wise, as done in crc32.c. We could share the tight
- * loop below with crc32 and vary the POLY if we don't find value in terms
- * of space and maintainability in keeping the two modules separate.
- */
-uint32_t __attribute__((pure))
-crc32c_le(uint32_t crc, unsigned char const *p, size_t len)
-{
- int i;
- while (len--) {
- crc ^= *p++;
- for (i = 0; i < 8; i++)
- crc = (crc >> 1) ^ ((crc & 1) ? CRC32C_POLY_LE : 0);
- }
- return crc;
-}
-#else
-
-/*
- * This is the CRC-32C table
- * Generated with:
- * width = 32 bits
- * poly = 0x1EDC6F41
- * reflect input bytes = true
- * reflect output bytes = true
- */
-
-static const uint32_t crc32c_table[256] = {
- 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
- 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
- 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
- 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
- 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
- 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
- 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
- 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
- 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
- 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
- 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
- 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
- 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
- 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
- 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
- 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
- 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
- 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
- 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
- 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
- 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
- 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
- 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
- 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
- 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
- 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
- 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
- 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
- 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
- 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
- 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
- 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
- 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
- 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
- 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
- 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
- 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
- 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
- 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
- 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
- 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
- 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
- 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
- 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
- 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
- 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
- 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
- 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
- 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
- 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
- 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
- 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
- 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
- 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
- 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
- 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
- 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
- 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
- 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
- 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
- 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
- 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
- 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
- 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
-};
-
-/*
- * Steps through buffer one byte at at time, calculates reflected
- * crc using table.
- */
-
-uint32_t __attribute__((pure))
-crc32c_le(uint32_t seed, unsigned char const *data, size_t length)
-{
- uint32_t crc = __cpu_to_le32(seed);
-
- while (length--)
- crc =
- crc32c_table[(crc ^ *data++) & 0xFFL] ^ (crc >> 8);
-
- return __le32_to_cpu(crc);
-}
-
-#endif /* CRC_LE_BITS == 8 */
-
-#if CRC_BE_BITS == 1
-uint32_t __attribute__((pure))
-crc32c_be(uint32_t crc, unsigned char const *p, size_t len)
-{
- int i;
- while (len--) {
- crc ^= *p++ << 24;
- for (i = 0; i < 8; i++)
- crc =
- (crc << 1) ^ ((crc & 0x80000000) ? CRC32C_POLY_BE :
- 0);
- }
- return crc;
-}
-#endif
diff --git a/usr/libcrc32c.c b/usr/libcrc32c.c
new file mode 100644
index 0000000..bda0020
--- /dev/null
+++ b/usr/libcrc32c.c
@@ -0,0 +1,188 @@
+/*
+ * CRC32C
+ *@Article{castagnoli-crc,
+ * author = { Guy Castagnoli and Stefan Braeuer and Martin Herrman},
+ * title = {{Optimization of Cyclic Redundancy-Check Codes with 24
+ * and 32 Parity Bits}},
+ * journal = IEEE Transactions on Communication,
+ * year = {1993},
+ * volume = {41},
+ * number = {6},
+ * pages = {},
+ * month = {June},
+ *}
+ * Used by the iSCSI driver, possibly others, and derived from the
+ * the iscsi-crc.c module of the linux-iscsi driver at
+ * http://linux-iscsi.sourceforge.net.
+ *
+ * Following the example of lib/crc32, this function is intended to be
+ * flexible and useful for all users. Modules that currently have their
+ * own crc32c, but hopefully may be able to use this one are:
+ * net/sctp (please add all your doco to here if you change to
+ * use this one!)
+ * <endoflist>
+ *
+ * Copyright (c) 2004 Cisco Systems, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#include "crc32c.h"
+#include <asm/byteorder.h>
+
+/*
+ * MODULE_AUTHOR("Clay Haapala <chaapala at cisco.com>");
+ * MODULE_DESCRIPTION("CRC32c (Castagnoli) calculations");
+ * MODULE_LICENSE("GPL");
+*/
+
+#define CRC32C_POLY_BE 0x1EDC6F41
+#define CRC32C_POLY_LE 0x82F63B78
+
+#ifndef CRC_LE_BITS
+# define CRC_LE_BITS 8
+#endif
+
+/*
+ * Haven't generated a big-endian table yet, but the bit-wise version
+ * should at least work.
+ */
+#if defined CRC_BE_BITS && CRC_BE_BITS != 1
+#undef CRC_BE_BITS
+#endif
+#ifndef CRC_BE_BITS
+# define CRC_BE_BITS 1
+#endif
+
+#if CRC_LE_BITS == 1
+/*
+ * Compute things bit-wise, as done in crc32.c. We could share the tight
+ * loop below with crc32 and vary the POLY if we don't find value in terms
+ * of space and maintainability in keeping the two modules separate.
+ */
+uint32_t __attribute__((pure))
+crc32c_le(uint32_t crc, unsigned char const *p, size_t len)
+{
+ int i;
+ while (len--) {
+ crc ^= *p++;
+ for (i = 0; i < 8; i++)
+ crc = (crc >> 1) ^ ((crc & 1) ? CRC32C_POLY_LE : 0);
+ }
+ return crc;
+}
+#else
+
+/*
+ * This is the CRC-32C table
+ * Generated with:
+ * width = 32 bits
+ * poly = 0x1EDC6F41
+ * reflect input bytes = true
+ * reflect output bytes = true
+ */
+
+static const uint32_t crc32c_table[256] = {
+ 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
+ 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
+ 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
+ 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
+ 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
+ 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
+ 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
+ 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
+ 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
+ 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
+ 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
+ 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
+ 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
+ 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
+ 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
+ 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
+ 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
+ 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
+ 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
+ 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
+ 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
+ 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
+ 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
+ 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
+ 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
+ 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
+ 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
+ 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
+ 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
+ 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
+ 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
+ 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
+ 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
+ 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
+ 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
+ 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
+ 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
+ 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
+ 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
+ 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
+ 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
+ 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
+ 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
+ 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
+ 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
+ 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
+ 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
+ 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
+ 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
+ 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
+ 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
+ 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
+ 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
+ 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
+ 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
+ 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
+ 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
+ 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
+ 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
+ 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
+ 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
+ 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
+ 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
+ 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L
+};
+
+/*
+ * Steps through buffer one byte at at time, calculates reflected
+ * crc using table.
+ */
+
+uint32_t __attribute__((pure))
+crc32c_le(uint32_t seed, unsigned char const *data, size_t length)
+{
+ uint32_t crc = __cpu_to_le32(seed);
+
+ while (length--)
+ crc =
+ crc32c_table[(crc ^ *data++) & 0xFFL] ^ (crc >> 8);
+
+ return __le32_to_cpu(crc);
+}
+
+#endif /* CRC_LE_BITS == 8 */
+
+#if CRC_BE_BITS == 1
+uint32_t __attribute__((pure))
+crc32c_be(uint32_t crc, unsigned char const *p, size_t len)
+{
+ int i;
+ while (len--) {
+ crc ^= *p++ << 24;
+ for (i = 0; i < 8; i++)
+ crc =
+ (crc << 1) ^ ((crc & 0x80000000) ? CRC32C_POLY_BE :
+ 0);
+ }
+ return crc;
+}
+#endif
--
1.5.6.5
--
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