diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index ae7355a276..a82043f303 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -1,3 +1,16 @@
+2001-11-19 17:20 GMT+1 Martin Vogel <vogel@inttec.de>
+
+   + contrib/libct/bit2.c
+     + number and bit manipulation functions CLEARBIT, SETBIT, ISBIT
+
+     all provided by Walter Negro - FOEESITRA <waltern@foeesitra.org.ar>
+
+   * contrib/libct/Makefile
+   * contrib/libct/makefile.bc
+   * contrib/libct/makefile.vc
+   * contrib/libct/ctflist.txt
+     * changes according to the above
+
 2001-11-19 xx:xx GMT+0700 Andi Jahja <harbour@cbn.net.id>
    * source/compiler/harbour.y
      ! add type casts for MsVC
diff --git a/harbour/contrib/libct/Makefile b/harbour/contrib/libct/Makefile
index ee6c446504..b9e55c818d 100644
--- a/harbour/contrib/libct/Makefile
+++ b/harbour/contrib/libct/Makefile
@@ -11,6 +11,7 @@ C_SOURCES = \
         atadjust.c \
         atnum.c \
         atrepl.c \
+	bit2.c \
         charevod.c \
         charlist.c \
         charmirr.c \
diff --git a/harbour/contrib/libct/bit2.c b/harbour/contrib/libct/bit2.c
new file mode 100644
index 0000000000..9444178f00
--- /dev/null
+++ b/harbour/contrib/libct/bit2.c
@@ -0,0 +1,283 @@
+/*
+ * $Id$
+ */
+
+/*
+ * Harbour Project source code:
+ *   CT3 Number and bit manipulation functions: - CLEARBIT()
+ *                                              - SETBIT()
+ *                                              - ISBIT()
+ *
+ * Copyright 2001 Walter Negro - FOEESITRA" <waltern@foeesitra.org.ar>
+ * www - http://www.harbour-project.org
+ *
+ * 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, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
+ *
+ * As a special exception, the Harbour Project gives permission for
+ * additional uses of the text contained in its release of Harbour.
+ *
+ * The exception is that, if you link the Harbour libraries with other
+ * files to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the Harbour library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the Harbour
+ * Project under the name Harbour.  If you copy code from other
+ * Harbour Project or Free Software Foundation releases into a copy of
+ * Harbour, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way.  To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for Harbour, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.
+ *
+ */
+
+
+#include "ct.h"
+
+
+long int static __hex2long( char *cNum1, int iLenHex );
+long int static __getparam( int iParam );
+
+
+/*  $DOC$
+ *  $FUNCNAME$
+ *      CLEARBIT()
+ *  $CATEGORY$
+ *      CT3 number and bit manipulation functions
+ *  $ONELINER$
+ *  $SYNTAX$
+ *      CLEARBIT( <nLONG|cHexLONG>, <nBitPos1>[,...<nBitPos32>] ) -> <nNewValue>
+ *  $ARGUMENTS$
+ *  $RETURNS$
+ *  $DESCRIPTION$
+ *      TODO: add documentation
+ *  $EXAMPLES$
+ *  $TESTS$
+ *  $STATUS$
+ *      Started
+ *  $COMPLIANCE$
+ *  $PLATFORMS$
+ *      All
+ *  $FILES$
+ *      Source is bit2.c, library is libct.
+ *  $SEEALSO$
+ *      SETBIT(), ISBIT()
+ *  $END$
+ */
+
+HB_FUNC( CLEARBIT )
+{
+  long int lNumClearBit = -1;
+  long int lNum1;
+  int      iNum2;
+  int iPCount, iFor;
+
+  iPCount = hb_pcount();
+
+  lNum1 = __getparam( 1 );  /* Obtain the parameter and converting from HEXA
+                               if necessary */
+
+  if ( ISNUM(1) || ISCHAR(1) )
+
+    for ( iFor=2; iFor <= iPCount; iFor++)
+    {
+      if ( ISNUM( iFor ) )
+      {
+         iNum2 = hb_parni( iFor );
+
+         if ( (iNum2 >= 1) && (iNum2 <= 32) )
+           /* if bit to clear this between 1 and 32 */
+              
+           lNumClearBit = lNum1 & ~( 1L << (iNum2 - 1) );
+
+         else
+         {
+           lNumClearBit = -1L;
+           break;
+         }
+      }
+      else
+      {
+        lNumClearBit = -1L;
+        break;
+      }
+    }
+  else
+    lNumClearBit = -1L;
+
+  hb_retnl( lNumClearBit );
+
+}
+
+
+/*  $DOC$
+ *  $FUNCNAME$
+ *      SETBIT()
+ *  $CATEGORY$
+ *      CT3 number and bit manipulation functions
+ *  $ONELINER$
+ *  $SYNTAX$
+ *      SETBIT( <nLONG|cHexLONG>, <nBitPos1>[,...<nBitPos32>] ) -> <nNewValue>
+ *  $ARGUMENTS$
+ *  $RETURNS$
+ *  $DESCRIPTION$
+ *      TODO: add documentation
+ *  $EXAMPLES$
+ *  $TESTS$
+ *  $STATUS$
+ *      Started
+ *  $COMPLIANCE$
+ *  $PLATFORMS$
+ *      All
+ *  $FILES$
+ *      Source is bit2.c, library is libct.
+ *  $SEEALSO$
+ *      CLEARBIT(), ISBIT()
+ *  $END$
+ */
+
+HB_FUNC( SETBIT )
+{
+  long int lNumSetBit = -1L;
+  long int lNum1;
+  int      iNum2;
+  int iPCount, iFor;
+
+  iPCount = hb_pcount();
+
+  lNum1 = __getparam( 1 );  /* Obtain the parameter and converting from HEXA
+                               if necessary */
+
+  if ( ISNUM(1) || ISCHAR(1) )
+
+    for ( iFor=2; iFor <= iPCount; iFor++)
+    {
+      if ( ISNUM( iFor ) )
+      {
+         iNum2 = hb_parni( iFor );
+
+         if ( (iNum2 >= 1) && (iNum2 <= 32) )
+           /* if bit to clear this between 1 and 32 */
+
+           lNumSetBit = lNum1 | ( 1L << (iNum2 - 1) );
+
+         else
+         {
+           lNumSetBit = -1L;
+           break;
+         }
+      }
+      else
+      {
+        lNumSetBit = -1L;
+        break;
+      }
+    }
+  else
+    lNumSetBit = -1L;
+
+  hb_retnl( lNumSetBit );
+
+}
+
+/*  $DOC$
+ *  $FUNCNAME$
+ *      ISBIT()
+ *  $CATEGORY$
+ *      CT3 number and bit manipulation functions
+ *  $ONELINER$
+ *  $SYNTAX$
+ *      ISBIT( <nLONG|cHexLONG>, <nBitPos> ) -> <lSet>
+ *  $ARGUMENTS$
+ *  $RETURNS$
+ *  $DESCRIPTION$
+ *      TODO: add documentation
+ *  $EXAMPLES$
+ *  $TESTS$
+ *  $STATUS$
+ *      Started
+ *  $COMPLIANCE$
+ *  $PLATFORMS$
+ *      All
+ *  $FILES$
+ *      Source is bit2.c, library is libct.
+ *  $SEEALSO$
+ *      CLEARBIT(), SETBIT()
+ *  $END$
+ */
+
+HB_FUNC ( ISBIT )
+{
+  long int lNum1;
+  int      iTestBit;
+
+  if (( ISNUM( 1 ) || ISCHAR( 1 ) ) && ( ISNUM( 2 ) ) )
+  {
+     lNum1    = __getparam( 1 );
+     iTestBit = hb_parni( 2 );
+
+     hb_retl( lNum1 & ( 1L << (iTestBit - 1) ) );
+  }
+  else
+     hb_retl( FALSE );
+
+}
+
+
+long int static __hex2long( char *cNum1, int iLenHex )
+{
+  register int i;
+  register int iNum;
+  long int     iHexNum = 0;
+
+
+  i = ( iLenHex - 1 );
+  while (( i >= 0 ) && ( iLenHex-i <= 4 ))
+  {
+     iNum = ((int) cNum1[i]) - 0x30;
+
+     if (iNum > 9)
+       iNum -= 7;
+
+     if ((iNum < 0) || (iNum > 0x0F))
+       break;
+     
+     iHexNum += (long int) iNum * (1 << (4 * ( iLenHex - i - 1 )));
+     i--;
+  }
+  return iHexNum;
+}
+
+
+long int static __getparam( int iParam )
+{
+
+  if ( ISCHAR( iParam ) )
+     return  __hex2long( hb_parc( iParam ), hb_parclen( iParam ) );
+  else
+     return hb_parnl( iParam );
+
+}
+
+
diff --git a/harbour/contrib/libct/ctflist.txt b/harbour/contrib/libct/ctflist.txt
index 0d697ebd7b..372f11bd86 100644
--- a/harbour/contrib/libct/ctflist.txt
+++ b/harbour/contrib/libct/ctflist.txt
@@ -272,7 +272,7 @@ WORDTOCHAR    ;S;
 ;
 BITTOC        ;N; 
 CELSIUS       ;R; 
-CLEARBIT      ;N; 
+CLEARBIT      ;S; 
 CTOBIT        ;N; 
 CTOF          ;N; 
 CTON          ;S; 
@@ -282,7 +282,7 @@ FTOC          ;N;
 INFINITY      ;R; 
 INTNEG        ;N; 
 INTPOS        ;N; 
-ISBIT         ;N; 
+ISBIT         ;S; 
 LTON          ;N; 
 MANTISSA      ;N; 
 NTOC          ;S; 
@@ -297,7 +297,7 @@ NUMROL        ;N;
 NUMXOR        ;N; 
 RAND          ;N; 
 RANDOM        ;N; 
-SETBIT        ;N; 
+SETBIT        ;S; 
 ;
 ;
 ;2.2 video functions
diff --git a/harbour/contrib/libct/makefile.bc b/harbour/contrib/libct/makefile.bc
index 19c67de180..d50e028901 100644
--- a/harbour/contrib/libct/makefile.bc
+++ b/harbour/contrib/libct/makefile.bc
@@ -96,6 +96,7 @@ TOOLS_LIB_OBJS = \
    $(OBJ_DIR)\atadjust.obj \
    $(OBJ_DIR)\atnum.obj \
    $(OBJ_DIR)\atrepl.obj \
+   $(OBJ_DIR)\bit2.obj \
    $(OBJ_DIR)\charevod.obj \
    $(OBJ_DIR)\charlist.obj \
    $(OBJ_DIR)\charmirr.obj \
@@ -183,6 +184,10 @@ $(OBJ_DIR)\atrepl.obj : $(TOOLS_DIR)\atrepl.c
    $(CC) $(CLIBFLAGS) -o$@ $**
    tlib $(TOOLS_LIB) $(ARFLAGS) -+$@,,
 
+$(OBJ_DIR)\bit2.obj : $(TOOLS_DIR)\bit2.c
+   $(CC) $(CLIBFLAGS) -o$@ $**
+   tlib $(TOOLS_LIB) $(ARFLAGS) -+$@,,
+
 $(OBJ_DIR)\charevod.obj : $(TOOLS_DIR)\charevod.c
    $(CC) $(CLIBFLAGS) -o$@ $**
    tlib $(TOOLS_LIB) $(ARFLAGS) -+$@,,
diff --git a/harbour/contrib/libct/makefile.vc b/harbour/contrib/libct/makefile.vc
index 2819b9538f..7c3a5a4419 100644
--- a/harbour/contrib/libct/makefile.vc
+++ b/harbour/contrib/libct/makefile.vc
@@ -116,6 +116,7 @@ TOOLS_LIB_OBJS = \
    $(OBJ_DIR)\atadjust.obj \
    $(OBJ_DIR)\atnum.obj \
    $(OBJ_DIR)\atrepl.obj \
+   $(OBJ_DIR)\bit2.obj \
    $(OBJ_DIR)\charevod.obj \
    $(OBJ_DIR)\charlist.obj \
    $(OBJ_DIR)\charmirr.obj \
@@ -176,6 +177,7 @@ CLEAN:
    -@if exist $(OBJ_DIR)\atadjust.* del $(OBJ_DIR)\atadjust.*
    -@if exist $(OBJ_DIR)\atnum.* del $(OBJ_DIR)\atnum.*
    -@if exist $(OBJ_DIR)\atrepl.* del $(OBJ_DIR)\atrepl.*
+   -@if exist $(OBJ_DIR)\bit2.* del $(OBJ_DIR)\bit2.*
    -@if exist $(OBJ_DIR)\charevod.* del $(OBJ_DIR)\charevod.*
    -@if exist $(OBJ_DIR)\charlist.* del $(OBJ_DIR)\charlist.*
    -@if exist $(OBJ_DIR)\charmirr.* del $(OBJ_DIR)\charmirr.*