Hi Alan,

sure, I will have a look, though I do not have time within the
first couple of days of this week.

Regards,

Arjen

On 2011-10-28 20:40, Alan W. Irwin wrote:
> Hi Andrew:
> 
> I am going to pass this decision about the correct way to
> avoid that long string over to Arjen.  See below.
> 
> On 2011-10-28 14:04+0100 Andrew Ross wrote:
> 
>> Alan: I've noticed one issue that you might want to look at. The file
>> bindings/tcl/plplot_parameters.h is generated by a sed script.  It
>> creates a large string of commands to pass to the tcl interpreter.
>> Unfortunately the length of this string (currently 5296) is greater
>> than the string length which compilers are required to support under
>> the ISO C99 standard (4096 characters). The length is even less for
>> C89. I don't know whether any compilers enforce this limit, but
>> it would be prudent to avoid this long static string. Possibilities
>> include splitting it up into several smaller strings, or dynamically
>> allocating the string (can be any size) and then copying in the
>> commands in smaller chunks. I've also changed how this header is
>> included slightly. Since it is a static function copies were being
>> included in a number of object files which didn't actually use
>> the function.
> 
> Hi Arjen:
> 
> bindings/tcl/plplot_parameters.h was your original creation so could
> you have a look at it to see how to reformat it to avoid the
> long string that violates C standards that Andrew referred to above?
> 
> I am involved in this to a certain extent because I am the author of
> the custom target called check_tcl_parameters (see
> bindings/tcl/CMakeLists.txt).  That target uses the "sed" command to
> process the #defines in bindings/swig-support/plplotcapi.i to create a
> check version called bindings/tcl/plplot_parameters.h_compare in the
> build tree.  It then uses the "cmp" command to check the consistency
> between that check version and bindings/tcl/plplot_parameters.h.  Just
> now I made some changes in bindings/tcl/global_defines.sed so that it
> produces styled results.  Therefore as of revision 12013 the
> check_tcl_parameters target generates a check version that is in exact
> agreement with our already existing styled version of
> bindings/tcl/plplot_parameters.h.
> 
> By the way, I adopted this method of checking
> bindings/tcl/plplot_parameters.h for consistency rather than simply
> generating that file, because not all platforms have access to sed.
> 
> Note, that once you decide on the appropriate format for
> bindings/tcl/plplot_parameters.h to avoid the long string, there
> should be no necessity for hand crafting
> bindings/tcl/plplot_parameters.h.  Instead, please let me know what
> format you desire, and I can do the rest with the appropriate changes
> to the sed script and copying the resulting
> bindings/tcl/plplot_parameters.h_compare back to
> bindings/tcl/plplot_parameters.h.
> 
> Alternatively, you do have access to both the sed and cmp commands via
> MSYS.  So you have the opportunity of changing the sed script
> yourself, running the check_tcl_parameters target, and looking at the
> resulting bindings/tcl/plplot_parameters.h_compare to make sure it has
> your desired format.  I could help you with the sed part of this if
> your sed knowledge is a little rusty (or currently nonexistent).
> 
> Alan
> __________________________
> Alan W. Irwin
> 
> Astronomical research affiliation with Department of Physics and Astronomy,
> University of Victoria (astrowww.phys.uvic.ca).
> 
> Programming affiliations with the FreeEOS equation-of-state
> implementation for stellar interiors (freeeos.sf.net); the Time
> Ephemerides project (timeephem.sf.net); PLplot scientific plotting
> software package (plplot.sf.net); the libLASi project
> (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
> and the Linux Brochure Project (lbproject.sf.net).
> __________________________
> 
> Linux-powered Science
> __________________________
> 
 

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