Category : Dbase (Clipper, FoxBase, etc) Languages Source Code
Archive   : NFSRC21.ZIP
Filename : BYT2HEX.PRG

/*
* File......: BYT2HEX.PRG
* Author....: Forest Belt, Computer Diagnostic Services, Inc.
* Date......: $Date: 15 Aug 1991 23:03:00 $
* Revision..: $Revision: 1.2 $
* Log file..: $Logfile: E:/nanfor/src/byt2hex.prv $
*
* This is an original work by Forest Belt and is placed in the
* public domain.
*
* Modification history:
* ---------------------
*
* $Log: E:/nanfor/src/byt2hex.prv $
*
* Rev 1.2 15 Aug 1991 23:03:00 GLENN
* Forest Belt proofread/edited/cleaned up doc
*
* Rev 1.1 14 Jun 1991 19:51:10 GLENN
* Minor edit to file header
*
* Rev 1.0 01 Apr 1991 01:00:48 GLENN
* Nanforum Toolkit
*
*/


/* $DOC$
* $FUNCNAME$
* FT_BYT2HEX()
* $CATEGORY$
* Conversion
* $ONELINER$
* Convert byte to hexadecimal version of its binary value
* $SYNTAX$
* FT_BYT2HEX( cByte ) -> cHexValue
* $ARGUMENTS$
* is the byte to convert.
* $RETURNS$
* Three-character string, consisting of two digits of hexadecimal
* notation and letter 'h' to signify hex. Returns NIL if parameters are
* faulty.
* $DESCRIPTION$
* Can be used to show results of bit manipulation, both before and after.
*
* This function is presented to illustrate that bit-wise operations
* are possible with Clipper code. For greater speed, write .C or
* .ASM versions and use the Clipper Extend system.
* $EXAMPLES$
* These three code lines perform a bitwise AND on bytes with values of
* CHR(20) and CHR(36), and deliver the result as a string in hexadecimal
* format, using 'h' to signify hexadecimal.
*
* ? FT_BYT2HEX(CHR(20)) // byte1: '14h'
* ? FT_BYT2HEX(CHR(36)) // byte2: '24h'
*
* ? FT_BYT2HEX(FT_BYTEAND(CHR(20), CHR(36)))
* // result: '04h'
*
* For a demonstration of Clipper bit manipulations, compile and
* link the program BITTEST.PRG in the Nanforum Toolkit source code.
* $SEEALSO$
* FT_BYT2BIT()
* $END$
*/

FUNCTION FT_BYT2HEX(cByte)

local cHexTable := "0123456789ABCDEF"
local xHexString

if valtype(cByte) != "C"
xHexString := NIL
else
xHexString := substr(cHexTable, int(asc(cByte) / 16) + 1, 1) ;
+ substr(cHexTable, int(asc(cByte) % 16) + 1, 1) ;
+ "h"
endif

RETURN xHexString