C::DynaLib::Struct 0.55

C::DynaLib::Struct is a tool for handling the C `struct data type. SYNOPSIS use C::DynaLib::Struct; Define C::DynaLib::Struct( $struct_tag, $template0, @field_names0, [$template1, @field_names1,] ... ); $rstruct = tie( $struct, $struct_tag [, @initializer_list] ); $value = $rstruct->my_field(); $rstruct->my_field( $new_value ); $pointer_to_struct = pack( p, $struct ); $struct = $new_struct; # assigns all fields at once # after passing pointer-to-struct to a C function: $rstruct->Unpack(); $returned_value = $rstruct->my_field(); When mixing Perl and C, the conversion of data types can be rather tedious and error-prone. This module provides an abstraction from Perls pack and unpack operators for using structures whose member data types and positions do not change. Here are some examples of C code that deals with a struct. On the right are some possible Perl equivalents. C Perl - ---- typedef struct { use C::DynaLib::Struct; int m_int; Define C::DynaLib::Struct( double m_double; Foo, char * m_string; i => [m_int], } Foo; d => [m_double], p => [m_string] ); # or, equivalently, Define C::DynaLib::Struct(Foo, idp, [qw(m_int m_double m_string)]); Foo foo; Foo *pfoo = &foo; $rfoo = tie ($foo, Foo); i = pfoo->m_int; $i = $rfoo->m_int; d = foo.m_double; $d = (tied $foo)->m_double; pfoo->m_string = "hi"; $rfoo->m_string("hi"); Foo bar; tie ($bar, Foo); bar = foo; $bar = $foo; void do_foo(Foo *arg); use C::DynaLib; $lib = new C::DynaLib("-lfoo"); $do_foo = $lib->DeclareSub("do_foo","","P"); # or you could write an XSUB. do_foo(&foo); &$do_foo($foo); returned_i = foo.m_int; $rfoo->Unpack(); $returned_i = $rfoo->m_int;.

Requirements:	No special requirements
Platforms:	Linux
Keyword:	Cdynalibstruct,  Define C,  Double,  Dynalib,  Foo,  Int,  Libraries,  Programming,  Struct
Users rating:	0/10