NAME

FFI::Platypus::API - Platypus arguments and return value API for custom types

VERSION

version 2.04

SYNOPSIS

package FFI::Platypus::Type::MyCustomType;

use FFI::Platypus::API;

sub ffi_custom_type_api_1
{
  {
    native_type => 'uint32',
    perl_to_native => sub {
      my($value, $i) = @_;
      # Translates ($value) passed in from Perl
      # into ($value+1, $value+2)
      arguments_set_uint32($i, $value+1);
      arguments_set_uint32($i+1, $value+2);
    },
    argument_count => 2,
  }
}

DESCRIPTION

NOTE: I added this interface early on to FFI::Platypus, but haven't used it much, generally finding function wrappers to be a more powerful (although possibly not as fast) interface. It has thus not been tested as much as the rest of Platypus. If you feel the need to use this interface please coordinate with the Platypus developers.

The custom types API for FFI::Platypus allows you to set multiple C arguments from a single Perl argument as a common type. This is sometimes useful for pointer / size pairs which are a common pattern in C, but are usually represented by a single value (a string scalar) in Perl.

The custom type API is somewhat experimental, and you should expect some changes as needs arise (I won't break compatibility lightly, however).

FUNCTIONS

These functions are only valid within a custom type callback.

arguments_count

my $count = argument_count;

Returns the total number of native arguments.

arguments_get_sint8

my $sint8 = arguments_get_sint8 $i;

Get the 8 bit signed integer argument from position $i.

arguments_set_sint8

arguments_set_sint8 $i, $sint8;

Set the 8 bit signed integer argument at position $i to $sint8.

arguments_get_uint8

my $uint8 = arguments_get_uint8 $i;

Get the 8 bit unsigned integer argument from position $i.

arguments_set_uint8

arguments_set_uint8 $i, $uint8;

Set the 8 bit unsigned integer argument at position $i to $uint8.

arguments_get_sint16

my $sint16 = arguments_get_sint16 $i;

Get the 16 bit signed integer argument from position $i.

arguments_set_sint16

arguments_set_sint16 $i, $sint16;

Set the 16 bit signed integer argument at position $i to $sint16.

arguments_get_uint16

my $uint16 = arguments_get_uint16 $i;

Get the 16 bit unsigned integer argument from position $i.

arguments_set_uint16

arguments_set_uint16 $i, $uint16;

Set the 16 bit unsigned integer argument at position $i to $uint16.

arguments_get_sint32

my $sint32 = arguments_get_sint32 $i;

Get the 32 bit signed integer argument from position $i.

arguments_set_sint32

arguments_set_sint32 $i, $sint32;

Set the 32 bit signed integer argument at position $i to $sint32.

arguments_get_uint32

my $uint32 = arguments_get_uint32 $i;

Get the 32 bit unsigned integer argument from position $i.

arguments_set_uint32

arguments_set_uint32 $i, $uint32;

Set the 32 bit unsigned integer argument at position $i to $uint32.

arguments_get_sint64

my $sint64 = arguments_get_sint64 $i;

Get the 64 bit signed integer argument from position $i.

arguments_set_sint64

arguments_set_sint64 $i, $sint64;

Set the 64 bit signed integer argument at position $i to $sint64.

arguments_get_uint64

my $uint64 = arguments_get_uint64 $i;

Get the 64 bit unsigned integer argument from position $i.

arguments_set_uint64

arguments_set_uint64 $i, $uint64;

Set the 64 bit unsigned integer argument at position $i to $uint64.

arguments_get_float

my $float = arguments_get_float $i;

Get the floating point argument from position $i.

arguments_set_float

arguments_set_float $i, $float;

Set the floating point argument at position $i to $float

arguments_get_double

my $double = arguments_get_double $i;

Get the double precision floating point argument from position $i.

arguments_set_double

arguments_set_double $i, $double;

Set the double precision floating point argument at position $i to $double

arguments_get_pointer

my $pointer = arguments_get_pointer $i;

Get the pointer argument from position $i.

arguments_set_pointer

arguments_set_pointer $i, $pointer;

Set the pointer argument at position $i to $pointer.

arguments_get_string

my $string = arguments_get_string $i;

Get the string argument from position $i.

arguments_set_string

arguments_set_string $i, $string;

Set the string argument at position $i to $string.

SEE ALSO

FFI::Platypus

Examples of use:

FFI::Platypus::Type::PointerSizeBuffer

AUTHOR

Author: Graham Ollis <plicease@cpan.org>

Contributors:

Bakkiaraj Murugesan (bakkiaraj)

Dylan Cali (calid)

pipcet

Zaki Mughal (zmughal)

Fitz Elliott (felliott)

Vickenty Fesunov (vyf)

Gregor Herrmann (gregoa)

Shlomi Fish (shlomif)

Damyan Ivanov

Ilya Pavlov (Ilya33)

Petr Písař (ppisar)

Mohammad S Anwar (MANWAR)

Håkon Hægland (hakonhagland, HAKONH)

Meredith (merrilymeredith, MHOWARD)

Diab Jerius (DJERIUS)

Eric Brine (IKEGAMI)

szTheory

José Joaquín Atria (JJATRIA)

Pete Houston (openstrike, HOUSTON)

COPYRIGHT AND LICENSE

This software is copyright (c) 2015-2022 by Graham Ollis.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

cpanm FFI::Platypus

perl -MCPAN -e shell
install FFI::Platypus