Several of the routines in src/plbox.c had snprintf calls similar
to the following:
snprintf( string, STRING_LEN, "(x10#u%d#d)", (int) scale );
That, of course, was wrong since it assumed the current PLplot string escape
character was always going to be '#' (which is usually the case, but not
always the case). Before the fix you could demonstrate the problem by
inserting "plsesc('@');" in C example 1 and watch how that screwed
up the exponent on one of the axes.
I have fixed these issues (revision 12705) by writing a static
function called plgesc_string which returns the string (not integer)
associated with the current escape character, and I use that string to
replace the "#" characters that appear in the above and similar
statements. Those changes fixed the slightly modified example 1 that
I used to demonstrate the original issue.
As the years go by, I have gained more confidence in my C skills, but
nevertheless the implementation of plgesc_string is pretty brute
force; it uses 9 case statements (similar to those used in plsesc to
filter attempts to set anything other than the 9 escape character
possibilities we allow) to sort out the possibilities. So if anybody
here can think of a faster, more elegant way to do this, please let me
know.
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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