12-11-2013
How to get the negate of decimal to binary?
Hi All,
New to this forum (and yes , a newbie in programming..
)
I have a decimal to binary converter script done this way :
i=$1
bit0=$(( (i & 0x01) > 0 ))
bit1=$(( (i & 0x02) > 0 ))
bit2=$(( (i & 0x04) > 0 ))
bit3=$(( (i & 0x08) > 0 ))
bit4=$(( (i & 0x10) > 0 ))
bit5=$(( (i & 0x20) > 0 ))
bit6=$(( (i & 0x40) > 0 ))
bit7=$(( (i & 0x80) > 0 ))
Fisrt I would like to understand how the expression $(( (i & 0x01) > 0 )) works
Next, I need to obtain the same bits to its negate, so i.e. if for decimal
177
bit0=1
bit1=0
bit2=0
bit3=0
bit4=1
bit5=1
bit6=0
bit7=1
I need
bit8=0
bit9=1
bitA=1
bitB=1
bitC=0
bitD=0
bitE=1
bitF=0
is there a way to accomplish this inside the same script ??
Thank you very much.
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LEARN ABOUT HPUX
_encodebinary128
_encodebinary64(3M) _encodebinary64(3M)
NAME
_encodebinary64(), _encodebinary128(), _encodebinary32() - encode binary-encoded decimal data
SYNOPSIS
DESCRIPTION
There are two standard bit-encodings for decimal floating-point data: binary and decimal. Both encoding provide exactly the same data
(analogous to big endian and little endian encodings). The HP-UX decimal floating-point types use the binary encoding.
The function encodes x as a binary-encoded 64-bit decimal datum.
is a version of it takes a argument and returns a result.
is a version of it takes a argument and returns a result.
These math functions are supported for HP-UX 11i Version 3 September 2008 Update and forward.
USAGE
To use any of these functions, compile with the option.
Make sure your program defines and then includes
Link in the math library by specifying or on the linking command line.
For more information, see the at the following site:
RETURN VALUE
returns x in the binary encoding.
raises no exceptions.
ERRORS
No errors are defined.
SEE ALSO
_decodebinary64(3M), _decodedecimal64(3M), _encodedecimal64(3M), math(5).
STANDARDS CONFORMANCE
These functions are not specified in any standard.
HP Integrity Server Only _encodebinary64(3M)