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|
;+
; NAME:
; BINARY
;
; PURPOSE:
;
; This function is used to display a binary representation of byte,
; integer, and long integer values.
;
; AUTHOR:
;
; FANNING SOFTWARE CONSULTING
; David Fanning, Ph.D.
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: david@idlcoyote.com
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
;
; CATEGORY:
;
; Utilities
;
; CALLING SEQUENCE:
;
; output = Binary(theNumber)
;
; RETURN VALUE:
;
; output: A string array of 0s and 1s to be printed (normally), in a
; binary representation of the number. The number is represented with
; the highest bits on the left and the lowest bits on the right,
; when printed with the PRINT command.
;
; ARGUMENTS:
;
; theNumber: The number for which the user wants a binary representation.
; It must be BYTE, INT, or LONG.
;
; KEYWORDRS:
;
; COLOR: If this keyword is set, the binary representation always
; contains 24 bits of output.
;
; SEPARATE: If this keyword is set, the output is separated with space
; between each group of eight bits.
;
; EXAMPLE:
;
; IDL> Print, Binary(24B)
; 0 0 0 1 1 0 0 0
; IDL> Print, Binary(24L)
; 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0
; IDL> Print, Binary(24L, /COLOR)
; 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0
; IDL> Print, Binary(24L, /COLOR, /SEPARATE)
; 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0
;
; MODIFICATION HISTORY:
;
; Written by: David W. Fanning, November 10, 2007.
; Fixed a problem with error handling. 13 March 2008. DWF.
;-
;******************************************************************************************;
; Copyright (c) 2008, by Fanning Software Consulting, Inc. ;
; All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
FUNCTION BINARY, number, COLOR=color, SEPARATE=separate
ON_ERROR, 2
; What kind of number is this?
thisType = SIZE(number, /Type)
CASE thisType OF
1: BEGIN ; Byte value
bin = STRARR(8)
FOR j=0,7 DO BEGIN
powerOfTwo = 2L^j
IF (LONG(number) AND powerOfTwo) EQ powerOfTwo THEN $
bin(j) = '1' ELSE bin(j) = '0'
ENDFOR
IF Keyword_Set(color) THEN bin = [bin, STRARR(16)+'0']
ENDCASE
2: BEGIN ; Integer value.
bin = STRARR(16)
FOR j=0,15 DO BEGIN
powerOfTwo = 2L^j
IF (LONG(number) AND powerOfTwo) EQ powerOfTwo THEN $
bin(j) = '1' ELSE bin(j) = '0'
ENDFOR
IF Keyword_Set(color) THEN bin = [bin, STRARR(8)+'0']
ENDCASE
3: BEGIN ; Long integer value.
number = LONG(number)
bin = STRARR(32)
FOR j=0,31 DO BEGIN
powerOfTwo = 2L^j
IF (LONG(number) AND powerOfTwo) EQ powerOfTwo THEN $
bin(j) = '1' ELSE bin(j) = '0'
ENDFOR
IF Keyword_Set(color) THEN bin = bin[0:23]
ENDCASE
ELSE: Message, 'Only BYTE, INTEGER, and LONG values allowed.'
ENDCASE
; Do we need to separate in groups of 8?
IF Keyword_Set(separate) THEN BEGIN
CASE N_Elements(bin) OF
8:
16: bin = [bin[0:7], ' ', bin[8:15]]
24: bin = [bin[0:7], ' ', bin[8:15], ' ', bin[16:23]]
32: bin = [bin[0:7], ' ', bin[8:15], ' ', bin[16:23], ' ', bin[24:31]]
ENDCASE
ENDIF
; Reverse the array, so highest bits are on left and lowest bits are on right.
RETURN, Reverse(bin)
END
|
