Pdlpp(3) User Contributed Perl Documentation Pdlpp(3)NAME
Inline::Pdlpp - Write PDL Subroutines inline with PDL::PP
DESCRIPTION
"Inline::Pdlpp" is a module that allows you to write PDL subroutines in
the PDL::PP style. The big benefit compared to plain "PDL::PP" is that
you can write these definitions inline in any old perl script (without
the normal hassle of creating Makefiles, building, etc). Since version
0.30 the Inline module supports multiple programming languages and each
language has its own support module. This document describes how to use
Inline with PDL::PP (or rather, it will once these docs are complete
";)".
For more information on Inline in general, see Inline.
Some example scripts demonstrating "Inline::Pdlpp" usage can be found
in the Example/InlinePdlpp directory.
"Inline::Pdlpp" is mostly a shameless rip-off of "Inline::C". Most
Kudos goes to Brian I.
Usage
You never actually use "Inline::Pdlpp" directly. It is just a support
module for using "Inline.pm" with "PDL::PP". So the usage is always:
use Inline Pdlpp => ...;
or
bind Inline Pdlpp => ...;
Examples
Pending availability of full docs a few quick examples that illustrate
typical usage.
A simple example
# example script inlpp.pl
use PDL; # must be called before (!) 'use Inline Pdlpp' calls
use Inline Pdlpp; # the actual code is in the __Pdlpp__ block below
$a = sequence 10;
print $a->inc,"\n";
print $a->inc->dummy(1,10)->tcumul,"\n";
__DATA__
__Pdlpp__
pp_def('inc',
Pars => 'i();[o] o()',
Code => '$o() = $i() + 1;',
);
pp_def('tcumul',
Pars => 'in(n);[o] mul()',
Code => '$mul() = 1;
loop(n) %{
$mul() *= $in();
%}',
);
# end example script
If you call this script it should generate output similar to this:
prompt> perl inlpp.pl
Inline running PDL::PP version 2.2...
[1 2 3 4 5 6 7 8 9 10]
[3628800 3628800 3628800 3628800 3628800 3628800 3628800 3628800 3628800 3628800]
Usage of "Inline::Pdlpp" in general is similar to "Inline::C". In the
absence of full docs for "Inline::Pdlpp" you might want to compare
Inline::C.
Code that uses external libraries, etc
The script below is somewhat more complicated in that it uses code from
an external library (here from Numerical Recipes). All the relevant
information regarding include files, libraries and boot code is
specified in a config call to "Inline". For more experienced Perl
hackers it might be helpful to know that the format is similar to that
used with ExtUtils::MakeMaker. The keywords are largely equivalent to
those used with "Inline::C". Please see below for further details on
the usage of "INC", "LIBS", "AUTO_INCLUDE" and "BOOT".
use PDL; # this must be called before (!) 'use Inline Pdlpp' calls
use Inline Pdlpp => Config =>
INC => "-I$ENV{HOME}/include",
LIBS => "-L$ENV{HOME}/lib -lnr -lm",
# code to be included in the generated XS
AUTO_INCLUDE => <<'EOINC',
#include <math.h>
#include "nr.h" /* for poidev */
#include "nrutil.h" /* for err_handler */
static void nr_barf(char *err_txt)
{
fprintf(stderr,"Now calling croak...\n");
croak("NR runtime error: %s",err_txt);
}
EOINC
# install our error handler when loading the Inline::Pdlpp code
BOOT => 'set_nr_err_handler(nr_barf);';
use Inline Pdlpp; # the actual code is in the __Pdlpp__ block below
$a = zeroes(10) + 30;;
print $a->poidev(5),"\n";
__DATA__
__Pdlpp__
pp_def('poidev',
Pars => 'xm(); [o] pd()',
GenericTypes => [L,F,D],
OtherPars => 'long idum',
Code => '$pd() = poidev((float) $xm(), &$COMP(idum));',
);
Pdlpp Configuration Options
For information on how to specify Inline configuration options, see
Inline. This section describes each of the configuration options
available for Pdlpp. Most of the options correspond either to MakeMaker
or XS options of the same name. See ExtUtils::MakeMaker and perlxs.
AUTO_INCLUDE
Specifies extra statements to automatically included. They will be
added onto the defaults. A newline char will be automatically added.
Does essentially the same as a call to "pp_addhdr". For short bits of
code "AUTO_INCLUDE" is probably syntactically nicer.
use Inline Pdlpp => Config => AUTO_INCLUDE => '#include "yourheader.h"';
BLESS
Same as "pp_bless" command. Specifies the package (i.e. class) to which
your new pp_defed methods will be added. Defaults to "PDL" if omitted.
use Inline Pdlpp => Config => BLESS => 'PDL::Complex';
BOOT
Specifies C code to be executed in the XS BOOT section. Corresponds to
the XS parameter. Does the same as the "pp_add_boot" command. Often
used to execute code only once at load time of the module, e.g. a
library initialization call.
CC
Specify which compiler to use.
CCFLAGS
Specify extra compiler flags.
INC
Specifies an include path to use. Corresponds to the MakeMaker
parameter.
use Inline Pdlpp => Config => INC => '-I/inc/path';
LD
Specify which linker to use.
LDDLFLAGS
Specify which linker flags to use.
NOTE: These flags will completely override the existing flags, instead
of just adding to them. So if you need to use those too, you must
respecify them here.
LIBS
Specifies external libraries that should be linked into your code.
Corresponds to the MakeMaker parameter.
use Inline Pdlpp => Config => LIBS => '-lyourlib';
or
use Inline Pdlpp => Config => LIBS => '-L/your/path -lyourlib';
MAKE
Specify the name of the 'make' utility to use.
MYEXTLIB
Specifies a user compiled object that should be linked in. Corresponds
to the MakeMaker parameter.
use Inline Pdlpp => Config => MYEXTLIB => '/your/path/yourmodule.so';
OPTIMIZE
This controls the MakeMaker OPTIMIZE setting. By setting this value to
'-g', you can turn on debugging support for your Inline extensions.
This will allow you to be able to set breakpoints in your C code using
a debugger like gdb.
TYPEMAPS
Specifies extra typemap files to use. Corresponds to the MakeMaker
parameter.
use Inline Pdlpp => Config => TYPEMAPS => '/your/path/typemap';
NOISY
Show the output of any compilations going on behind the scenes. Uses
"tee" which must be available on your computer. Default is off.
BUGS
"do"ing inline scripts
Beware that there is a problem when you use the __DATA__ keyword style
of Inline definition and want to "do" your script containing inlined
code. For example
# myscript.pl contains inlined code
# in the __DATA__ section
perl -e 'do "myscript.pl";'
One or more DATA sections were not processed by Inline.
According to Brian Ingerson (of Inline fame) the workaround is to
include an "Inline->init" call in your script, e.g.
use PDL;
use Inline Pdlpp;
Inline->init;
# perl code
__DATA__
__Pdlpp__
# pp code
"PDL::NiceSlice" and "Inline::Pdlpp"
There is currently an undesired interaction between PDL::NiceSlice and
"Inline::Pdlpp". Since PP code generally contains expressions of the
type "$var()" (to access piddles, etc) PDL::NiceSlice recognizes those
incorrectly as slice expressions and does its substitutions. For the
moment (until hopefully the parser can deal with that) it is best to
explicitly switch PDL::NiceSlice off before the section of inlined
Pdlpp code. For example:
use PDL::NiceSlice;
use Inline::Pdlpp;
$a = sequence 10;
$a(0:3)++;
$a->inc;
no PDL::NiceSlice;
__DATA__
__C__
ppdef (...); # your full pp definition here
ACKNOWLEDGEMENTS
Brian Ingerson for creating the Inline infrastructure.
AUTHOR
Christian Soeller <soellermail@excite.com>
SEE ALSO
PDL
PDL::PP
Inline
Inline::C
COPYRIGHT
Copyright (c) 2001. Christian Soeller. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as PDL itself.
See http://pdl.perl.org
perl v5.10.0 2003-05-06 Pdlpp(3)
