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Edit File : ParseXS.pod \| Size : 4.30 KB
=head1 NAME ExtUtils::ParseXS - converts Perl XS code into C code =head1 SYNOPSIS use ExtUtils::ParseXS; my $pxs = ExtUtils::ParseXS->new; $pxs->process_file( filename => 'foo.xs' ); $pxs->process_file( filename => 'foo.xs', output => 'bar.c', 'C++' => 1, typemap => 'path/to/typemap', hiertype => 1, except => 1, versioncheck => 1, linenumbers => 1, optimize => 1, prototypes => 1, ); # Legacy non-OO interface using a singleton: use ExtUtils::ParseXS qw(process_file); process_file( filename => 'foo.xs' ); =head1 DESCRIPTION C<ExtUtils::ParseXS> will compile XS code into C code by embedding the constructs necessary to let C functions manipulate Perl values and creates the glue necessary to let Perl access those functions. The compiler uses typemaps to determine how to map C function parameters and variables to Perl values. The compiler will search for typemap files called I<typemap>. It will use the following search path to find default typemaps, with the rightmost typemap taking precedence. ../../../typemap:../../typemap:../typemap:typemap =head1 EXPORT None by default. C<process_file()> and/or C<report_error_count()> may be exported upon request. Using the functional interface is discouraged. =head1 METHODS =over 4 =item $pxs->new() Returns a new, empty XS parser/compiler object. =item $pxs->process_file() This method processes an XS file and sends output to a C file. The method may be called as a function (this is the legacy interface) and will then use a singleton as invocant. Named parameters control how the processing is done. The following parameters are accepted: =over 4 =item B<C++> Adds C<extern "C"> to the C code. Default is false. =item B<hiertype> Retains C<::> in type names so that C++ hierarchical types can be mapped. Default is false. =item B<except> Adds exception handling stubs to the C code. Default is false. =item B<typemap> Indicates that a user-supplied typemap should take precedence over the default typemaps. A single typemap may be specified as a string, or multiple typemaps can be specified in an array reference, with the last typemap having the highest precedence. =item B<prototypes> Generates prototype code for all xsubs. Default is false. =item B<versioncheck> Makes sure at run time that the object file (derived from the C<.xs> file) and the C<.pm> files have the same version number. Default is true. =item B<linenumbers> Adds C<#line> directives to the C output so error messages will look like they came from the original XS file. Default is true. =item B<optimize> Enables certain optimizations. The only optimization that is currently affected is the use of I<target>s by the output C code (see L<perlguts>). Not optimizing may significantly slow down the generated code, but this is the way B<xsubpp> of 5.005 and earlier operated. Default is to optimize. =item B<inout> Enable recognition of C<IN>, C<OUT_LIST> and C<INOUT_LIST> declarations. Default is true. =item B<argtypes> Enable recognition of ANSI-like descriptions of function signature. Default is true. =item B<s> I<Maintainer note:> I have no clue what this does. Strips function prefixes? =back =item $pxs->report_error_count() This method returns the number of [a certain kind of] errors encountered during processing of the XS file. The method may be called as a function (this is the legacy interface) and will then use a singleton as invocant. =back =head1 AUTHOR Based on xsubpp code, written by Larry Wall. Maintained by: =over 4 =item * Ken Williams, <ken@mathforum.org> =item * David Golden, <dagolden@cpan.org> =item * James Keenan, <jkeenan@cpan.org> =item * Steffen Mueller, <smueller@cpan.org> =back =head1 COPYRIGHT Copyright 2002-2014 by Ken Williams, David Golden and other contributors. All rights reserved. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. Based on the C<ExtUtils::xsubpp> code by Larry Wall and the Perl 5 Porters, which was released under the same license terms. =head1 SEE ALSO L<perl>, ExtUtils::xsubpp, ExtUtils::MakeMaker, L<perlxs>, L<perlxstut>. =cut Back

Edit File : ParseXS.pod | Size : 4.30 KB

=head1 NAME

ExtUtils::ParseXS - converts Perl XS code into C code

=head1 SYNOPSIS

use ExtUtils::ParseXS;

my $pxs = ExtUtils::ParseXS->new;
  $pxs->process_file( filename => 'foo.xs' );

$pxs->process_file( filename => 'foo.xs',
                      output => 'bar.c',
                      'C++' => 1,
                      typemap => 'path/to/typemap',
                      hiertype => 1,
                      except => 1,
                      versioncheck => 1,
                      linenumbers => 1,
                      optimize => 1,
                      prototypes => 1,
                    );

# Legacy non-OO interface using a singleton:
  use ExtUtils::ParseXS qw(process_file);
  process_file( filename => 'foo.xs' );

=head1 DESCRIPTION

C<ExtUtils::ParseXS> will compile XS code into C code by embedding the constructs
necessary to let C functions manipulate Perl values and creates the glue
necessary to let Perl access those functions.  The compiler uses typemaps to
determine how to map C function parameters and variables to Perl values.

The compiler will search for typemap files called I<typemap>.  It will use
the following search path to find default typemaps, with the rightmost
typemap taking precedence.

../../../typemap:../../typemap:../typemap:typemap

=head1 EXPORT

None by default.  C<process_file()> and/or C<report_error_count()>
may be exported upon request. Using the functional interface is
discouraged.

=head1 METHODS

=over 4

=item $pxs->new()

Returns a new, empty XS parser/compiler object.

=item $pxs->process_file()

This method processes an XS file and sends output to a C file.
The method may be called as a function (this is the legacy
interface) and will then use a singleton as invocant.

Named parameters control how the processing is done.
The following parameters are accepted:

=over 4

=item B<C++>

Adds C<extern "C"> to the C code.  Default is false.

=item B<hiertype>

Retains C<::> in type names so that C++ hierarchical types can be
mapped.  Default is false.

=item B<except>

Adds exception handling stubs to the C code.  Default is false.

=item B<typemap>

Indicates that a user-supplied typemap should take precedence over the
default typemaps.  A single typemap may be specified as a string, or
multiple typemaps can be specified in an array reference, with the
last typemap having the highest precedence.

=item B<prototypes>

Generates prototype code for all xsubs.  Default is false.

=item B<versioncheck>

Makes sure at run time that the object file (derived from the C<.xs>
file) and the C<.pm> files have the same version number.  Default is
true.

=item B<linenumbers>

Adds C<#line> directives to the C output so error messages will look
like they came from the original XS file.  Default is true.

=item B<optimize>

Enables certain optimizations.  The only optimization that is currently
affected is the use of I<target>s by the output C code (see L<perlguts>).
Not optimizing may significantly slow down the generated code, but this is the way
B<xsubpp> of 5.005 and earlier operated.  Default is to optimize.

=item B<inout>

Enable recognition of C<IN>, C<OUT_LIST> and C<INOUT_LIST>
declarations.  Default is true.

=item B<argtypes>

Enable recognition of ANSI-like descriptions of function signature.
Default is true.

=item B<s>

I<Maintainer note:> I have no clue what this does.  Strips function prefixes?

=back

=item $pxs->report_error_count()

This method returns the number of [a certain kind of] errors
encountered during processing of the XS file.

The method may be called as a function (this is the legacy
interface) and will then use a singleton as invocant.

=back

=head1 AUTHOR

Based on xsubpp code, written by Larry Wall.

Maintained by:

=over 4

=item *

Ken Williams, <ken@mathforum.org>

=item *

David Golden, <dagolden@cpan.org>

=item *

James Keenan, <jkeenan@cpan.org>

=item *

Steffen Mueller, <smueller@cpan.org>

=back

=head1 COPYRIGHT

This library is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.

Based on the C<ExtUtils::xsubpp> code by Larry Wall and the Perl 5
Porters, which was released under the same license terms.

=head1 SEE ALSO

L<perl>, ExtUtils::xsubpp, ExtUtils::MakeMaker, L<perlxs>, L<perlxstut>.

=cut

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