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/*
* Copyright (c) 2009, Wayne Meissner
*
* All rights reserved.
*
* This file is part of ruby-ffi.
*
* This code is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License version 3 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* version 3 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with this work. If not, see <http://www.gnu.org/licenses/>.
*/
#include <ruby.h>
#include <ffi.h>
#include "ArrayType.h"
static VALUE array_type_s_allocate(VALUE klass);
static VALUE array_type_initialize(VALUE self, VALUE rbComponentType, VALUE rbLength);
static void array_type_mark(ArrayType *);
static void array_type_free(ArrayType *);
VALUE rbffi_ArrayTypeClass = Qnil;
static VALUE
array_type_s_allocate(VALUE klass)
{
ArrayType* array;
VALUE obj;
obj = Data_Make_Struct(klass, ArrayType, array_type_mark, array_type_free, array);
array->base.nativeType = NATIVE_ARRAY;
array->base.ffiType = xcalloc(1, sizeof(*array->base.ffiType));
array->base.ffiType->type = FFI_TYPE_STRUCT;
array->base.ffiType->size = 0;
array->base.ffiType->alignment = 0;
array->rbComponentType = Qnil;
return obj;
}
static void
array_type_mark(ArrayType *array)
{
rb_gc_mark(array->rbComponentType);
}
static void
array_type_free(ArrayType *array)
{
xfree(array->base.ffiType);
xfree(array->ffiTypes);
xfree(array);
}
/*
* call-seq: initialize(component_type, length)
* @param [Type] component_type
* @param [Numeric] length
* @return [self]
* A new instance of ArrayType.
*/
static VALUE
array_type_initialize(VALUE self, VALUE rbComponentType, VALUE rbLength)
{
ArrayType* array;
int i;
Data_Get_Struct(self, ArrayType, array);
array->length = NUM2UINT(rbLength);
array->rbComponentType = rbComponentType;
Data_Get_Struct(rbComponentType, Type, array->componentType);
array->ffiTypes = xcalloc(array->length + 1, sizeof(*array->ffiTypes));
array->base.ffiType->elements = array->ffiTypes;
array->base.ffiType->size = array->componentType->ffiType->size * array->length;
array->base.ffiType->alignment = array->componentType->ffiType->alignment;
for (i = 0; i < array->length; ++i) {
array->ffiTypes[i] = array->componentType->ffiType;
}
return self;
}
/*
* call-seq: length
* @return [Numeric]
* Get array's length
*/
static VALUE
array_type_length(VALUE self)
{
ArrayType* array;
Data_Get_Struct(self, ArrayType, array);
return UINT2NUM(array->length);
}
/*
* call-seq: element_type
* @return [Type]
* Get element type.
*/
static VALUE
array_type_element_type(VALUE self)
{
ArrayType* array;
Data_Get_Struct(self, ArrayType, array);
return array->rbComponentType;
}
void
rbffi_ArrayType_Init(VALUE moduleFFI)
{
/*
* Document-class: FFI::ArrayType < FFI::Type
*
* This is a typed array. The type is a {NativeType native type}.
*/
rbffi_ArrayTypeClass = rb_define_class_under(moduleFFI, "ArrayType", rbffi_TypeClass);
/*
* Document-variable: FFI::ArrayType
*/
rb_global_variable(&rbffi_ArrayTypeClass);
/*
* Document-constant: FFI::Type::Array
*/
rb_define_const(rbffi_TypeClass, "Array", rbffi_ArrayTypeClass);
rb_define_alloc_func(rbffi_ArrayTypeClass, array_type_s_allocate);
rb_define_method(rbffi_ArrayTypeClass, "initialize", array_type_initialize, 2);
rb_define_method(rbffi_ArrayTypeClass, "length", array_type_length, 0);
rb_define_method(rbffi_ArrayTypeClass, "elem_type", array_type_element_type, 0);
}
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