[Plplot-devel] definition of PLINT

[Alan W. I. <ir...@be...>]

The recent AMD-64 fortran troubles were caused by a mismatch between the
long type of PLINT (64 bits on AMD-64) and fortran integer*4 which is 32
bits on AMD-64 as well as IA-32, and from its name I believe it is always
going to be 32 bits on all platforms.

To make sure such mismatches do not happen on any platform, I think what we
need is to define PLINT as a 32-bit integer on all platforms.

Assuming you all agree with this change, should we implement 32-bit integers
following what is currently done for PLUNICODE?  The proposed new code would
look like this.

#if defined(HAVE_STDINT_H)
#include <stdint.h>
/* This is apparently portable if stdint.h exists. */
typedef uint32_t PLUNICODE;
typedef int32_t PLINT;
#else
/* A reasonable back-up in case stdint.h does not exist on the platform. */
typedef unsigned int PLUNICODE;
typedef int PLINT;
#endif

Arjen and Andrew Roach, I presume for windows that stdint.h does not exist
and we would fall through to typedef int PLINT for that case. Do you see any
windows issues for such a solution?  Maurice, I would appreciate your
discussion as well since you probably have the most cross-platform Unix and
fortran experience here.

Alan
__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

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); PLplot scientific plotting software
package (plplot.org); the Yorick front-end to PLplot (yplot.sf.net); the
Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
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