NAME

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

SYNOPSIS

         use ExtUtils::ParseXS qw(process_file);

         process_file( filename => 'foo.xs' );

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

DESCRIPTION

       "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 typemap.  It will use the following
       search path to find default typemaps, with the rightmost typemap taking precedence.

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

EXPORT

       None by default.  "process_file()" may be exported upon request.

FUNCTIONS

       process_file()
           This function processes an XS file and sends output to a C file.  Named parameters
           control how the processing is done.  The following parameters are accepted:

           C++ Adds "extern "C"" to the C code.  Default is false.

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

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

           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.

           prototypes
               Generates prototype code for all xsubs.  Default is false.

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

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

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

           inout
               Enable recognition of "IN", "OUT_LIST" and "INOUT_LIST" declarations.  Default is
               true.

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

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

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

AUTHOR

       Based on xsubpp code, written by Larry Wall.

       Maintained by:

       •   Ken Williams, <ken@mathforum.org>

       •   David Golden, <dagolden@cpan.org>

       •   James Keenan, <jkeenan@cpan.org>

       •   Steffen Mueller, <smueller@cpan.org>

COPYRIGHT

       Copyright 2002-2012 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 "ExtUtils::xsubpp" code by Larry Wall and the Perl 5 Porters, which was
       released under the same license terms.

SEE ALSO

       perl, ExtUtils::xsubpp, ExtUtils::MakeMaker, perlxs, perlxstut.