* Rename md5 directory to hash for hash functions

  * Move crc.pas into hash

git-svn-id: trunk@1857 -

.gitattributes

@@ -1218,6 +1218,14 @@ packages/base/gdbint/gdbobjs.inc svneol=native#text/plain
 packages/base/gdbint/gdbver.pp svneol=native#text/plain
 packages/base/gdbint/symify.pp svneol=native#text/plain
 packages/base/gdbint/testgdb.pp svneol=native#text/plain
+packages/base/hash/Makefile svneol=native#text/plain
+packages/base/hash/Makefile.fpc svneol=native#text/plain
+packages/base/hash/crc.pas -text
+packages/base/hash/fpmake.inc svneol=native#text/plain
+packages/base/hash/fpmake.pp svneol=native#text/plain
+packages/base/hash/md5.pp svneol=native#text/plain
+packages/base/hash/md5.ref -text
+packages/base/hash/md5test.pp svneol=native#text/plain
 packages/base/ibase/Makefile svneol=native#text/plain
 packages/base/ibase/Makefile.fpc svneol=native#text/plain
 packages/base/ibase/README -text
@@ -1489,13 +1497,6 @@ packages/base/libc/wordexph.inc svneol=native#text/plain
 packages/base/libc/wordsizeh.inc svneol=native#text/plain
 packages/base/libc/xlocaleh.inc svneol=native#text/plain
 packages/base/libc/xopen_limh.inc svneol=native#text/plain
-packages/base/md5/Makefile svneol=native#text/plain
-packages/base/md5/Makefile.fpc svneol=native#text/plain
-packages/base/md5/fpmake.inc svneol=native#text/plain
-packages/base/md5/fpmake.pp svneol=native#text/plain
-packages/base/md5/md5.pp svneol=native#text/plain
-packages/base/md5/md5.ref -text
-packages/base/md5/md5test.pp svneol=native#text/plain
 packages/base/mysql/Makefile svneol=native#text/plain
 packages/base/mysql/Makefile.fpc svneol=native#text/plain
 packages/base/mysql/README -text

.gitignore

@@ -512,6 +512,13 @@ packages/base/gdbint/*.ppu
 packages/base/gdbint/*.s
 packages/base/gdbint/fpcmade.*
 packages/base/gdbint/units
+packages/base/hash/*.bak
+packages/base/hash/*.exe
+packages/base/hash/*.o
+packages/base/hash/*.ppu
+packages/base/hash/*.s
+packages/base/hash/fpcmade.*
+packages/base/hash/units
 packages/base/ibase/*.bak
 packages/base/ibase/*.exe
 packages/base/ibase/*.o
@@ -540,13 +547,6 @@ packages/base/libc/*.ppu
 packages/base/libc/*.s
 packages/base/libc/fpcmade.*
 packages/base/libc/units
-packages/base/md5/*.bak
-packages/base/md5/*.exe
-packages/base/md5/*.o
-packages/base/md5/*.ppu
-packages/base/md5/*.s
-packages/base/md5/fpcmade.*
-packages/base/md5/units
 packages/base/mysql/*.bak
 packages/base/mysql/*.exe
 packages/base/mysql/*.o

packages/base/md5/Makefile → packages/base/hash/Makefile

@@ -1,8 +1,8 @@
 #
-# Don't edit, this file is generated by FPCMake Version 2.0.0 [2005/11/20]
+# Don't edit, this file is generated by FPCMake Version 2.0.0 [2005/05/15]
 #
 default: all
-MAKEFILETARGETS=i386-linux i386-go32v2 i386-win32 i386-os2 i386-freebsd i386-beos i386-netbsd i386-solaris i386-qnx i386-netware i386-openbsd i386-wdosx i386-emx i386-watcom i386-netwlibc i386-wince m68k-linux m68k-freebsd m68k-netbsd m68k-amiga m68k-atari m68k-openbsd m68k-palmos powerpc-linux powerpc-netbsd powerpc-macos powerpc-darwin powerpc-morphos sparc-linux sparc-netbsd sparc-solaris x86_64-linux x86_64-freebsd x86_64-win64 arm-linux arm-wince powerpc64-linux
+MAKEFILETARGETS=i386-linux i386-go32v2 i386-win32 i386-os2 i386-freebsd i386-beos i386-netbsd i386-solaris i386-qnx i386-netware i386-openbsd i386-wdosx i386-emx i386-watcom i386-netwlibc m68k-linux m68k-freebsd m68k-netbsd m68k-amiga m68k-atari m68k-openbsd m68k-palmos powerpc-linux powerpc-netbsd powerpc-macos powerpc-darwin powerpc-morphos sparc-linux sparc-netbsd sparc-solaris x86_64-linux x86_64-freebsd arm-linux
 BSDs = freebsd netbsd openbsd darwin
 UNIXs = linux $(BSDs) solaris qnx
 LIMIT83fs = go32v2 os2 emx watcom
@@ -230,118 +230,106 @@ ifeq ($(UNITSDIR),)
 UNITSDIR:=$(wildcard $(FPCDIR)/units/$(OS_TARGET))
 endif
 PACKAGESDIR:=$(wildcard $(FPCDIR) $(FPCDIR)/packages/base $(FPCDIR)/packages/extra)
-override PACKAGE_NAME=md5
+override PACKAGE_NAME=hash
 override PACKAGE_VERSION=2.0.0
 ifeq ($(FULL_TARGET),i386-linux)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-go32v2)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-win32)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-os2)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-freebsd)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-beos)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-netbsd)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-solaris)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-qnx)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-netware)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-openbsd)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-wdosx)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-emx)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-watcom)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-netwlibc)
-override TARGET_UNITS+=md5
-endif
-ifeq ($(FULL_TARGET),i386-wince)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),m68k-linux)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),m68k-freebsd)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),m68k-netbsd)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),m68k-amiga)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),m68k-atari)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),m68k-openbsd)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),m68k-palmos)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),powerpc-linux)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),powerpc-netbsd)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),powerpc-macos)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),powerpc-darwin)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),powerpc-morphos)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),sparc-linux)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),sparc-netbsd)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),sparc-solaris)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),x86_64-linux)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),x86_64-freebsd)
-override TARGET_UNITS+=md5
-endif
-ifeq ($(FULL_TARGET),x86_64-win64)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),arm-linux)
-override TARGET_UNITS+=md5
-endif
-ifeq ($(FULL_TARGET),arm-wince)
-override TARGET_UNITS+=md5
-endif
-ifeq ($(FULL_TARGET),powerpc64-linux)
-override TARGET_UNITS+=md5
+override TARGET_UNITS+=md5 crc
 endif
 ifeq ($(FULL_TARGET),i386-linux)
 override TARGET_EXAMPLES+=md5test
@@ -388,9 +376,6 @@ endif
 ifeq ($(FULL_TARGET),i386-netwlibc)
 override TARGET_EXAMPLES+=md5test
 endif
-ifeq ($(FULL_TARGET),i386-wince)
-override TARGET_EXAMPLES+=md5test
-endif
 ifeq ($(FULL_TARGET),m68k-linux)
 override TARGET_EXAMPLES+=md5test
 endif
@@ -442,18 +427,9 @@ endif
 ifeq ($(FULL_TARGET),x86_64-freebsd)
 override TARGET_EXAMPLES+=md5test
 endif
-ifeq ($(FULL_TARGET),x86_64-win64)
-override TARGET_EXAMPLES+=md5test
-endif
 ifeq ($(FULL_TARGET),arm-linux)
 override TARGET_EXAMPLES+=md5test
 endif
-ifeq ($(FULL_TARGET),arm-wince)
-override TARGET_EXAMPLES+=md5test
-endif
-ifeq ($(FULL_TARGET),powerpc64-linux)
-override TARGET_EXAMPLES+=md5test
-endif
 override INSTALL_FPCPACKAGE=y
 ifdef REQUIRE_UNITSDIR
 override UNITSDIR+=$(REQUIRE_UNITSDIR)
@@ -1229,9 +1205,6 @@ endif
 ifeq ($(FULL_TARGET),i386-netwlibc)
 REQUIRE_PACKAGES_RTL=1
 endif
-ifeq ($(FULL_TARGET),i386-wince)
-REQUIRE_PACKAGES_RTL=1
-endif
 ifeq ($(FULL_TARGET),m68k-linux)
 REQUIRE_PACKAGES_RTL=1
 endif
@@ -1283,18 +1256,9 @@ endif
 ifeq ($(FULL_TARGET),x86_64-freebsd)
 REQUIRE_PACKAGES_RTL=1
 endif
-ifeq ($(FULL_TARGET),x86_64-win64)
-REQUIRE_PACKAGES_RTL=1
-endif
 ifeq ($(FULL_TARGET),arm-linux)
 REQUIRE_PACKAGES_RTL=1
 endif
-ifeq ($(FULL_TARGET),arm-wince)
-REQUIRE_PACKAGES_RTL=1
-endif
-ifeq ($(FULL_TARGET),powerpc64-linux)
-REQUIRE_PACKAGES_RTL=1
-endif
 ifdef REQUIRE_PACKAGES_RTL
 PACKAGEDIR_RTL:=$(firstword $(subst /Makefile.fpc,,$(strip $(wildcard $(addsuffix /rtl/Makefile.fpc,$(PACKAGESDIR))))))
 ifneq ($(PACKAGEDIR_RTL),)
@@ -1365,12 +1329,12 @@ ifeq ($(CPU_TARGET),i386)
 FPCCPUOPT:=-OG2p3
 else
 ifeq ($(CPU_TARGET),powerpc)
-FPCCPUOPT:=-O1r
+FPCCPUOPT:=-O1
 else
 FPCCPUOPT:=
 endif
 endif
-override FPCOPT+=-Ur -Xs $(FPCCPUOPT) -n
+override FPCOPT+=-Xs $(FPCCPUOPT) -n
 override FPCOPTDEF+=RELEASE
 endif
 ifdef STRIP
@@ -1442,14 +1406,6 @@ override FPCEXTCMD:=$(FPCOPT)
 override FPCOPT:=!FPCEXTCMD
 export FPCEXTCMD
 endif
-override AFULL_TARGET=$(CPU_TARGET)-$(OS_TARGET)
-override AFULL_SOURCE=$(CPU_SOURCE)-$(OS_SOURCE)
-ifneq ($(AFULL_TARGET),$(AFULL_SOURCE))
-override ACROSSCOMPILE=1
-endif
-ifdef ACROSSCOMPILE
-override FPCOPT+=$(CROSSOPT)
-endif
 override COMPILER:=$(FPC) $(FPCOPT)
 ifeq (,$(findstring -s ,$(COMPILER)))
 EXECPPAS=

packages/base/md5/Makefile.fpc → packages/base/hash/Makefile.fpc

@@ -3,11 +3,11 @@
 #
 
 [package]
-name=md5
+name=hash
 version=2.0.0
 
 [target]
-units=md5
+units=md5 crc
 examples=md5test
 
 [install]

packages/base/hash/crc.pas

@@ -0,0 +1,231 @@
+unit crc;
+
+{
+  crc32.c -- compute the CRC-32 of a data stream
+  Copyright (C) 1995-1998 Mark Adler
+
+  Pascal tranlastion
+  Copyright (C) 1998 by Jacques Nomssi Nzali
+  For conditions of distribution and use, see copyright notice in readme.txt
+}
+
+interface
+
+function crc32(crc : cardinal; buf : Pbyte; len : cardinal) : cardinal;
+
+{  Update a running crc with the bytes buf[0..len-1] and return the updated
+   crc. If buf is NULL, this function returns the required initial value
+   for the crc. Pre- and post-conditioning (one's complement) is performed
+   within this function so it shouldn't be done by the application.
+   Usage example:
+
+    var
+      crc : cardinal;
+    begin
+      crc := crc32(0, nil, 0);
+
+      while (read_buffer(buffer, length) <> EOF) do
+        crc := crc32(crc, buffer, length);
+
+      if (crc <> original_crc) then error();
+    end;
+
+}
+
+function get_crc_table : Pcardinal;  { can be used by asm versions of crc32() }
+
+
+implementation
+
+{$IFDEF DYNAMIC_CRC_TABLE}
+
+{local}
+const
+  crc_table_empty : boolean = TRUE;
+{local}
+var
+  crc_table : array[0..256-1] of uLongf;
+
+
+{
+  Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
+  x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
+
+  Polynomials over GF(2) are represented in binary, one bit per coefficient,
+  with the lowest powers in the most significant bit.  Then adding polynomials
+  is just exclusive-or, and multiplying a polynomial by x is a right shift by
+  one.  If we call the above polynomial p, and represent a byte as the
+  polynomial q, also with the lowest power in the most significant bit (so the
+  byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
+  where a mod b means the remainder after dividing a by b.
+
+  This calculation is done using the shift-register method of multiplying and
+  taking the remainder.  The register is initialized to zero, and for each
+  incoming bit, x^32 is added mod p to the register if the bit is a one (where
+  x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
+  x (which is shifting right by one and adding x^32 mod p if the bit shifted
+  out is a one).  We start with the highest power (least significant bit) of
+  q and repeat for all eight bits of q.
+
+  The table is simply the CRC of all possible eight bit values.  This is all
+  the information needed to generate CRC's on data a byte at a time for all
+  combinations of CRC register values and incoming bytes.
+}
+{local}
+procedure make_crc_table;
+var
+ c    : cardinal;
+ n,k  : integer;
+ poly : cardinal; { polynomial exclusive-or pattern }
+
+const
+ { terms of polynomial defining this crc (except x^32): }
+ p: array [0..13] of Byte = (0,1,2,4,5,7,8,10,11,12,16,22,23,26);
+
+begin
+  { make exclusive-or pattern from polynomial ($EDB88320) }
+  poly := longint(0);
+  for n := 0 to (sizeof(p) div sizeof(Byte))-1 do
+    poly := poly or (longint(1) shl (31 - p[n]));
+
+  for n := 0 to 255 do
+  begin
+    c := cardinal(n);
+    for k := 0 to 7 do
+    begin
+      if (c and 1) <> 0 then
+        c := poly xor (c shr 1)
+      else
+        c := (c shr 1);
+    end;
+    crc_table[n] := c;
+  end;
+  crc_table_empty := FALSE;
+end;
+
+{$ELSE}
+
+{ ========================================================================
+  Table of CRC-32's of all single-byte values (made by make_crc_table) }
+
+{local}
+const
+  crc_table : array[0..256-1] of cardinal = (
+  $00000000, $77073096, $ee0e612c, $990951ba, $076dc419,
+  $706af48f, $e963a535, $9e6495a3, $0edb8832, $79dcb8a4,
+  $e0d5e91e, $97d2d988, $09b64c2b, $7eb17cbd, $e7b82d07,
+  $90bf1d91, $1db71064, $6ab020f2, $f3b97148, $84be41de,
+  $1adad47d, $6ddde4eb, $f4d4b551, $83d385c7, $136c9856,
+  $646ba8c0, $fd62f97a, $8a65c9ec, $14015c4f, $63066cd9,
+  $fa0f3d63, $8d080df5, $3b6e20c8, $4c69105e, $d56041e4,
+  $a2677172, $3c03e4d1, $4b04d447, $d20d85fd, $a50ab56b,
+  $35b5a8fa, $42b2986c, $dbbbc9d6, $acbcf940, $32d86ce3,
+  $45df5c75, $dcd60dcf, $abd13d59, $26d930ac, $51de003a,
+  $c8d75180, $bfd06116, $21b4f4b5, $56b3c423, $cfba9599,
+  $b8bda50f, $2802b89e, $5f058808, $c60cd9b2, $b10be924,
+  $2f6f7c87, $58684c11, $c1611dab, $b6662d3d, $76dc4190,
+  $01db7106, $98d220bc, $efd5102a, $71b18589, $06b6b51f,
+  $9fbfe4a5, $e8b8d433, $7807c9a2, $0f00f934, $9609a88e,
+  $e10e9818, $7f6a0dbb, $086d3d2d, $91646c97, $e6635c01,
+  $6b6b51f4, $1c6c6162, $856530d8, $f262004e, $6c0695ed,
+  $1b01a57b, $8208f4c1, $f50fc457, $65b0d9c6, $12b7e950,
+  $8bbeb8ea, $fcb9887c, $62dd1ddf, $15da2d49, $8cd37cf3,
+  $fbd44c65, $4db26158, $3ab551ce, $a3bc0074, $d4bb30e2,
+  $4adfa541, $3dd895d7, $a4d1c46d, $d3d6f4fb, $4369e96a,
+  $346ed9fc, $ad678846, $da60b8d0, $44042d73, $33031de5,
+  $aa0a4c5f, $dd0d7cc9, $5005713c, $270241aa, $be0b1010,
+  $c90c2086, $5768b525, $206f85b3, $b966d409, $ce61e49f,
+  $5edef90e, $29d9c998, $b0d09822, $c7d7a8b4, $59b33d17,
+  $2eb40d81, $b7bd5c3b, $c0ba6cad, $edb88320, $9abfb3b6,
+  $03b6e20c, $74b1d29a, $ead54739, $9dd277af, $04db2615,
+  $73dc1683, $e3630b12, $94643b84, $0d6d6a3e, $7a6a5aa8,
+  $e40ecf0b, $9309ff9d, $0a00ae27, $7d079eb1, $f00f9344,
+  $8708a3d2, $1e01f268, $6906c2fe, $f762575d, $806567cb,
+  $196c3671, $6e6b06e7, $fed41b76, $89d32be0, $10da7a5a,
+  $67dd4acc, $f9b9df6f, $8ebeeff9, $17b7be43, $60b08ed5,
+  $d6d6a3e8, $a1d1937e, $38d8c2c4, $4fdff252, $d1bb67f1,
+  $a6bc5767, $3fb506dd, $48b2364b, $d80d2bda, $af0a1b4c,
+  $36034af6, $41047a60, $df60efc3, $a867df55, $316e8eef,
+  $4669be79, $cb61b38c, $bc66831a, $256fd2a0, $5268e236,
+  $cc0c7795, $bb0b4703, $220216b9, $5505262f, $c5ba3bbe,
+  $b2bd0b28, $2bb45a92, $5cb36a04, $c2d7ffa7, $b5d0cf31,
+  $2cd99e8b, $5bdeae1d, $9b64c2b0, $ec63f226, $756aa39c,
+  $026d930a, $9c0906a9, $eb0e363f, $72076785, $05005713,
+  $95bf4a82, $e2b87a14, $7bb12bae, $0cb61b38, $92d28e9b,
+  $e5d5be0d, $7cdcefb7, $0bdbdf21, $86d3d2d4, $f1d4e242,
+  $68ddb3f8, $1fda836e, $81be16cd, $f6b9265b, $6fb077e1,
+  $18b74777, $88085ae6, $ff0f6a70, $66063bca, $11010b5c,
+  $8f659eff, $f862ae69, $616bffd3, $166ccf45, $a00ae278,
+  $d70dd2ee, $4e048354, $3903b3c2, $a7672661, $d06016f7,
+  $4969474d, $3e6e77db, $aed16a4a, $d9d65adc, $40df0b66,
+  $37d83bf0, $a9bcae53, $debb9ec5, $47b2cf7f, $30b5ffe9,
+  $bdbdf21c, $cabac28a, $53b39330, $24b4a3a6, $bad03605,
+  $cdd70693, $54de5729, $23d967bf, $b3667a2e, $c4614ab8,
+  $5d681b02, $2a6f2b94, $b40bbe37, $c30c8ea1, $5a05df1b,
+  $2d02ef8d);
+
+{$ENDIF}
+
+{ =========================================================================
+  This function can be used by asm versions of crc32() }
+
+function get_crc_table : {const} Pcardinal;
+begin
+{$ifdef DYNAMIC_CRC_TABLE}
+  if (crc_table_empty) then
+    make_crc_table;
+{$endif}
+  get_crc_table :=  {const} Pcardinal(@crc_table);
+end;
+
+{ ========================================================================= }
+
+function crc32 (crc : cardinal; buf : Pbyte; len : cardinal): cardinal;
+begin
+  if (buf = nil) then
+    crc32 := 0
+  else
+  begin
+
+{$IFDEF DYNAMIC_CRC_TABLE}
+    if crc_table_empty then
+      make_crc_table;
+{$ENDIF}
+
+    crc := crc xor cardinal($ffffffff);
+    while (len >= 8) do
+    begin
+      {DO8(buf)}
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+
+      dec(len, 8);
+    end;
+    if (len <> 0) then
+    repeat
+      {DO1(buf)}
+      crc := crc_table[(integer(crc) xor buf^) and $ff] xor (crc shr 8);
+      inc(buf);
+
+      dec(len);
+    until (len = 0);
+    crc32 := crc xor cardinal($ffffffff);
+  end;
+end;
+
+
+end.