[Imgcif-l] CBF adds new lines to character data

[Herbert J. Bernstein]

There are two flavors of CIF -- the original 80 character line
length CIFs that can be read by all parsers, and the newer 2048
character line length CIFS that can be read by most newer parsers.
CBFlib can handle either line length, but, if you are in the 80
character mode and give it longer lines, it folds them with the
backslash escape.  To avoid this, you need to tell it you want
to use the longer line length, using cbf_write_widefile rather
than cbf_write_file, and cbf_read_widefile instead of cbf_read_file.

=====================================================
  Herbert J. Bernstein, Professor of Computer Science
    Dowling College, Kramer Science Center, KSC 121
         Idle Hour Blvd, Oakdale, NY, 11769

                  +1-631-244-3035
                  yaya at dowling.edu
=====================================================

On Wed, 15 Oct 2008, Michael Blum wrote:

> Hi Herb et al,
>
> For testing our production of CBF files, I am converting our marccd
> frames to CBF,  converting the CBF back to marccd, and
> then doing a "diff" between the original and final marccd frame
> files.  All interactions with the CBF file and data are done using
> CBFlib.
>
> I am having trouble getting some string values  back intact.
>
> Long comments  (strings) that are written to the CBF using
> set_value()  get newlines  (or carriage returns) added to them in the
> CBF file.
> When the text is extracted again, using cbf_get_value(),  it has the
> extra newlines it.  The original strings may or may not have their own
> newlines.  The added newlines seem to be "escaped', using '\', but
> neither the escapes nor the  escaped newlines  get removed from the
> string.
>
> This a little more than just a cosmetic issue, as sometimes we have
> formatted text in the comments, with columns that line up and
> we would like to get the text back in a readable format.
>
>
> two real examples using CBFlib v0.7.9 on a redhat 5.2 linux box.
> ( BTW, CBFlib 0.7.9 writes "0.7.8" into the header prologue! )
>
> --------------------------------
> This is OK:
>
> C-string input:
> "file comments for a blank image on the marMosaic simulator with dummy
> values"
>
> CBF result:  (with cbf_set_value() )
> _diffrn_data_frame.details^M
>  'file comments for a blank image on the marMosaic simulator with
> dummy values'^M
> ^M
>
> C-string result of reading CBF:  (with cbf_get_value())
> "file comments for a blank image on the marMosaic simulator with dummy
> values"
> --------------------------------
> --------------------------------
> This is NOT OK:
>
> C-string input:
> "dataset comments for a blank image on the marMosaic simulator with
> dummy values"
>
> CBF result:  ( of cbf_set_value() )
> _diffrn_measurement.details^M
> ;\
> dataset comments for a blank image on the marMosaic simulator with\
>  dummy values\
> ;
>
> C-string result of parsing CBF:  (with cbf_get_value())
> "\
> dataset comments for a blank image on the marMosaic simulator with\
>  dummy values\"
>
> --------------------------------
>
>
>
> Note NEW Company name and email address!
> _______________
> Michael L. Blum                    Toll Free: 877-627-XRAY (627-9729)
> Rayonix, LLC                        Tel: 847-869-1548
> 1880 Oak Avenue                 Fax: 847-869-1587
> Evanston, IL  60201              Email: blum at rayonix.com
> USA                                       WWW: www.rayonix.com
>
>
>
>
>
> _______________________________________________
> imgcif-l mailing list
> imgcif-l at iucr.org
> http://scripts.iucr.org/mailman/listinfo/imgcif-l
>