Michael Schulz wrote:
When i looked in mapparser.y i found this line:
345: math_exp '%' math_exp { $$ = (int)$1 * (int)$3; }
This looks like the modulo operator is defined, but the calculation is
not modulo.
Michael,
indeed, that isn't modulo nor is it modulus, that's a multiplication of
two truncated values (hence the (int) typecast). And
http://trac.osgeo.org/mapserver/changeset/5151 confirms that line in
mapparser.y is the actual implementation of what was called "modulus
operator" in HISTORY.TXT.
I'd file a bug report about this, since at least it isn't clear what is
meant with "modulus" in this instance. If you need the actual modulo
operator, I'd suggest changing that line to
math_exp '%' math_exp { $$ = (int)$1 % (int)$3; }
and regenerating the parser with yacc -p msyy -d -omapparser.c mapparser.y.
Best regards,
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Andreas Albarello
Analysis & SW Development
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