gnuplot-bugs Mailing List for gnuplot

On Thu, 25 Dec 2003, Richard B. Gilbert wrote:

> My C compiler (DECC V6.5 under OpenVMS/Alpha V7.3-1) produced the 
> following informational message:
> 
>     if (xmin_hl < 0 || xmax_hl > XREDUCE(xright) - XREDUCE(xleft))
> ........^
[...]
> Since since the expression "xmin_hl<0" must always evaluate to FALSE and 
> since there are simpler and clearer ways to express a NOOP, it seems to 
> me that this must be a bug.

No, it's a documented feature of the source code.  Look at the comment
by me, directly above that line of code...

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

Gentlemen:

My C compiler (DECC V6.5 under OpenVMS/Alpha V7.3-1) produced the 
following informational message:

    if (xmin_hl < 0 || xmax_hl > XREDUCE(xright) - XREDUCE(xleft))
........^
%CC-I-QUESTCOMPARE, In this statement, the unsigned expression "xmin_hl"
   is being compared with a relational operator to a constant whose 
value is not greater than zero.  This might not be what you intended.
at line number 2664 in file SYS$SYSDEVICE:[DRAGON.UTILS.GNUPLOT-3_7_3]HI 
DDEN3D.C;1

xmin_hl is declared as "static unsigned int". 

Since since the expression "xmin_hl<0" must always evaluate to FALSE and 
since there are simpler and clearer ways to express a NOOP, it seems to 
me that this must be a bug.

Thank you.