logand function

[Jtrainer]

I was looking up the function of "logand " and reading up on the "bitwise and". What I need to know is where can I find a comprehensive list indicating the various binary numbers for particular autocad states, is there a table somewhere ? For instance I found this routine on ACADX.com and need help knowing which bit is mapped to what state ????

(defun listxrefs
(apply
'append
(mapcar
'(lambda (x / elist code)
(if
(= (logand (setq code
(cdr
(assoc 70
(setq elist (entget (tblobjname "block" x)))
)
)
)
4
)
4
)

; obviously 4 is the binary number here indidcating that bit 3 is a 1 !!!!!!! ; so where do I find a list of these things??????

(list (list (cdr (assoc 2 elist))
(if (= (logand code 8) 8)
"Overlay"
"Attachment"
)
; likewise for the 4th bit indicating its an overlay !!!!! (if (= (logand code 32) 32) "Loaded" "Unloaded" ) (cdr (assoc 1 elist)) ) ) ) ) (table "block") ) )
)

Thanks for any help on this!

Jim Trainer
CAD Manager
R.W.Beck,Inc.
Seattle , Wa.
206-695-4749

 

[Mark Propst]

The help files under dxf codes list such data depending on the specific item you're looking for

I was looking up the function of "logand " and reading up on the "bitwise

and". What I need to know is where can I find a comprehensive list indicating the various binary numbers for particular autocad states, is there a table somewhere ?

For instance I found this routine on ACADX.com and need help knowing which

bit is mapped to what state ????

 

[Jtrainer]

CAN YOU GIVE ME A N EXAMPLE OF THIS? i CANT SEEM TO FIND ANYTHING, SUCH AS THIS ISXREF STATE FOR A BLOCK TABLE ENTRY AS IN THE EXAMPLE I INCLUDED.
JT

 

[Jeff Mishler]

Whoa! Hit that CAPSLOCK key, please.

Straight from the DXF Reference, BLOCKS Section, BLOCK definition:
70 Block-type flags (bit coded values, may be combined):
0 = Indicates none of the following flags apply
1 = This is an anonymous block generated by hatching, associative dimensioning, other internal operations, or an application 2 = This block has non-constant attribute definitions (this bit is not set if the block has any attribute definitions that are constant, or has no attribute definitions at all) 4 = This block is an external reference (xref) 8 = This block is an xref overlay 16 = This block is externally dependent 32 = This is a resolved external reference, or dependent of an external reference (ignored on input) 64 = This definition is a referenced external reference (ignored on input)

HTH,
Jeff

CAN YOU GIVE ME A N EXAMPLE OF THIS? i CANT SEEM TO FIND ANYTHING,

SUCH AS THIS ISXREF STATE FOR A BLOCK TABLE ENTRY AS IN THE EXAMPLE I INCLUDED.

 

[RDI]

List of DXF Codes (what you're asking for):
http://www.afralisp.com/zip1/dxf.zip

I was looking up the function of "logand " and reading up on the "bitwise

and". What I need to know is where can I find a comprehensive list indicating the various binary numbers for particular autocad states, is there a table somewhere ?

For instance I found this routine on ACADX.com and need help knowing which

bit is mapped to what state ????