FFI::Util 
Some useful pointer utilities when writing FFI modules (Deprecated)
SYNOPSIS
use FFI::Util;DESCRIPTION
Note: This module has largely been obsoleted by FFI::Platypus, which I recommend that you use instead of this module. This module may be removed from CPAN at a future date, but not before 31 January 2017.
This module provides some useful memory manipulation that is either difficult or impossible in pure Perl. It was originally intended to be used by Archive::Libarchive::FFI, but it may be useful in other projects.
FUNCTIONS
locate_module_share_lib
my $path = locate_module_share_lib();
my $path = locate_module_share_lib($module_name, $module_filename);Returns the path to the shared library for the current module, or the
module specified by $module_name (example: Foo::Bar)
$module_filename(example /full/path/Foo/Bar.pm).
scalar_to_buffer
my($ptr, $size) = scalar_to_buffer $scalar;Given a scalar string value, return a pointer to where the data is stored and the size of the scalar in bytes.
buffer_to_scalar
my $scalar = buffer_to_scalar($ptr, $size);Given a pointer to a memory location and a size, construct a new scalar with the same content and size.
deref_ptr_get
my $ptr2 = deref_ptr_get($ptr1);equivalent to
void *ptr1;
void *ptr2;
*ptr2 = *ptr1;deref_ptr_set
deref_ptr_set($ptr1, $ptr2);equivalent to
void **ptr1;
void *ptr2;
*ptr1 = ptr2;deref_str_get
my $string = deref_str_get($ptr);equivalent to
const char *string;
const char **ptr;
string = *ptr;deref_str_set
deref_str_set($ptr, $string);equivalent to
const char **ptr;
const char *string;
*ptr = string;deref_int_get
my $integer = deref_int_get($ptr);equivalent to
int *ptr;
int integer;
integer = *ptr;deref_int_set
deref_int_set($ptr, $integer);equivalent to
int *ptr;
int integer;
*ptr = integer;deref_uint_get
my $unsigned_integer = deref_uint_get($ptr);equivalent to
unsigned int unsigned_integer;
unsigned int *ptr;
unsigned_integer = *ptr;deref_uint_set
deref_uint_set($ptr, $unsigned_integer);equivalent to
unsigned int *ptr;
unsigned int unsigned_integer;
*ptr = unsigned_integer;deref_short_get
my $short_integer = deref_short_get($ptr);equivalent to
short short_integer;
short *ptr;
short_integer = *ptr;deref_short_set
deref_short_set($ptr, $short_integer);equivalent to
short *ptr;
short short_integer;
*ptr = short_integer;deref_ushort_get
my $unsigned_short_integer = deref_ushort_get($ptr);equivalent to
unsigned short unsigned_short_integer;
unsigned short *ptr;
unsigned unsigned_short_integer = *ptr;deref_ushort_set
deref_ushort_set($ptr, $unsigned_short_integer);equivalent to
unsigned short *ptr;
unsigned short unsigned_short_integer;
*ptr = unsigned_short_integer;deref_long_get
my $long_integer = deref_long_get($ptr);equivalent to
long long_integer;
long *ptr;
long_integer = *ptr;deref_long_set
deref_long_set($ptr, $long_integer);equivalent to
long *ptr;
long long_integer;
*ptr = long_integer;deref_ulong_get
my $unsigned_long_integer = deref_ulong_get($ptr);equivalent to
unsigned long unsigned_long_integer;
unsigned long *ptr;
unsigned unsigned_long_integer = *ptr;deref_ulong_set
deref_ulong_set($ptr, $unsigned_long_integer);equivalent to
unsigned long *ptr;
unsigned long unsigned_long_integer;
*ptr = unsigned_long_integer;deref_char_get
my $char_integer = deref_char_get($ptr);equivalent to
char char_integer;
char *ptr;
char_integer = *ptr;deref_char_set
deref_char_set($ptr, $char_integer);equivalent to
char *ptr;
char char_integer;
*ptr = char_integer;deref_uchar_get
my $unsigned_char_integer = deref_uchar_get($ptr);equivalent to
unsigned char unsigned char_integer;
unsigned char *ptr;
unsigned_char_integer = *ptr;deref_uchar_set
deref_uchar_set($ptr, $unsigned_char_integer);equivalent to
unsigned char *ptr;
unsigned char unsigned_char_integer;
*ptr = unsigned_char_integer;deref_float_get
my $single_float = deref_float_get($ptr);equivalent to
float single_float;
float *ptr;
single_float = *ptr;deref_float_set
deref_float_set($ptr, $single_float);equivalent to
float *ptr;
float single_float;
*ptr = single_float;deref_double_get
my $double_float = deref_double_get($ptr);equivalent to
double double_float;
double *ptr;
double_float = *ptr;deref_double_set
deref_double_set($ptr, $double_float);equivalent to
double *ptr;
double double_float;
*ptr = double_float;deref_int64_get
my $int64 = deref_int64_get($ptr);equivalent to
int64_t int64;
int64_t *ptr;
int64 = *ptr;deref_int64_set
deref_int64_set($ptr, $int64);equivalent to
int64_t *ptr;
int64_t int64;
*ptr = int64;deref_uint64_get
my $uint64 = deref_uint64_get($ptr);equivalent to
uint64_t uint64;
uint64_t *ptr;
uint64 = *ptr;deref_uint64_set
deref_uint64_set($ptr, $uint64);equivalent to
uint64_t *ptr;
uint64_t uint64;
*ptr = uint64;deref_dev_t_get
Alias for appropriate derf_..._get if dev_t is provided by your compiler.
deref_dev_t_set
Alias for appropriate derf_..._set if dev_t is provided by your compiler.
deref_gid_t_get
Alias for appropriate derf_..._get if gid_t is provided by your compiler.
deref_gid_t_set
Alias for appropriate derf_..._set if gid_t is provided by your compiler.
deref_size_t_get
Alias for appropriate derf_..._get if size_t is provided by your compiler.
deref_size_t_set
Alias for appropriate derf_..._set if size_t is provided by your compiler.
deref_time_t_get
Alias for appropriate derf_..._get if time_t is provided by your compiler.
deref_time_t_set
Alias for appropriate derf_..._set if time_t is provided by your compiler.
deref_uid_t_get
Alias for appropriate derf_..._get if uid_t is provided by your compiler.
deref_uid_t_set
Alias for appropriate derf_..._set if uid_t is provided by your compiler.
SEE ALSO
AUTHOR
Graham Ollis plicease@cpan.org
COPYRIGHT AND LICENSE
This software is copyright (c) 2013 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.