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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
* GObject introspection: Constant implementation
*
* Copyright (C) 2005 Matthias Clasen
* Copyright (C) 2008,2009 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <glib.h>
#include <string.h> // memcpy
#include <girepository.h>
#include "girepository-private.h"
#include "gitypelib-internal.h"
/**
* SECTION:giconstantinfo
* @Short_description: Struct representing a constant
* @Title: GIConstantInfo
*
* GIConstantInfo represents a constant. A constant has a type associated
* which can be obtained by calling g_constant_info_get_type() and a value,
* which can be obtained by calling g_constant_info_get_value().
*
* <refsect1 id="gi-giconstantinfo.struct-hierarchy" role="struct_hierarchy">
* <title role="struct_hierarchy.title">Struct hierarchy</title>
* <synopsis>
* <link linkend="gi-GIBaseInfo">GIBaseInfo</link>
* +----GIConstantInfo
* </synopsis>
* </refsect1>
*/
/**
* g_constant_info_get_type:
* @info: a #GIConstantInfo
*
* Obtain the type of the constant as a #GITypeInfo.
*
* Returns: (transfer full): the #GITypeInfo. Free the struct by calling
* g_base_info_unref() when done.
*/
GITypeInfo *
g_constant_info_get_type (GIConstantInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
g_return_val_if_fail (info != NULL, NULL);
g_return_val_if_fail (GI_IS_CONSTANT_INFO (info), NULL);
return _g_type_info_new ((GIBaseInfo*)info, rinfo->typelib, rinfo->offset + 8);
}
#define DO_ALIGNED_COPY(dest_addr, src_addr, type) \
memcpy((dest_addr), (src_addr), sizeof(type))
/**
* g_constant_info_free_value: (skip)
* @info: a #GIConstantInfo
* @value: the argument
*
* Free the value returned from g_constant_info_get_value().
*
* Since: 1.30.1
*/
void
g_constant_info_free_value (GIConstantInfo *info,
GIArgument *value)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
ConstantBlob *blob;
g_return_if_fail (info != NULL);
g_return_if_fail (GI_IS_CONSTANT_INFO (info));
blob = (ConstantBlob *)&rinfo->typelib->data[rinfo->offset];
/* FIXME non-basic types ? */
if (blob->type.flags.reserved == 0 && blob->type.flags.reserved2 == 0)
{
if (blob->type.flags.pointer)
g_free (value->v_pointer);
}
}
/**
* g_constant_info_get_value: (skip)
* @info: a #GIConstantInfo
* @value: (out): an argument
*
* Obtain the value associated with the #GIConstantInfo and store it in the
* @value parameter. @argument needs to be allocated before passing it in.
* The size of the constant value stored in @argument will be returned.
* Free the value with g_constant_info_free_value().
*
* Returns: size of the constant
*/
gint
g_constant_info_get_value (GIConstantInfo *info,
GIArgument *value)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
ConstantBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_CONSTANT_INFO (info), 0);
blob = (ConstantBlob *)&rinfo->typelib->data[rinfo->offset];
/* FIXME non-basic types ? */
if (blob->type.flags.reserved == 0 && blob->type.flags.reserved2 == 0)
{
if (blob->type.flags.pointer)
value->v_pointer = g_memdup (&rinfo->typelib->data[blob->offset], blob->size);
else
{
switch (blob->type.flags.tag)
{
case GI_TYPE_TAG_BOOLEAN:
value->v_boolean = *(gboolean*)&rinfo->typelib->data[blob->offset];
break;
case GI_TYPE_TAG_INT8:
value->v_int8 = *(gint8*)&rinfo->typelib->data[blob->offset];
break;
case GI_TYPE_TAG_UINT8:
value->v_uint8 = *(guint8*)&rinfo->typelib->data[blob->offset];
break;
case GI_TYPE_TAG_INT16:
value->v_int16 = *(gint16*)&rinfo->typelib->data[blob->offset];
break;
case GI_TYPE_TAG_UINT16:
value->v_uint16 = *(guint16*)&rinfo->typelib->data[blob->offset];
break;
case GI_TYPE_TAG_INT32:
value->v_int32 = *(gint32*)&rinfo->typelib->data[blob->offset];
break;
case GI_TYPE_TAG_UINT32:
value->v_uint32 = *(guint32*)&rinfo->typelib->data[blob->offset];
break;
case GI_TYPE_TAG_INT64:
DO_ALIGNED_COPY(&value->v_int64, &rinfo->typelib->data[blob->offset], gint64);
break;
case GI_TYPE_TAG_UINT64:
DO_ALIGNED_COPY(&value->v_uint64, &rinfo->typelib->data[blob->offset], guint64);
break;
case GI_TYPE_TAG_FLOAT:
DO_ALIGNED_COPY(&value->v_float, &rinfo->typelib->data[blob->offset], gfloat);
break;
case GI_TYPE_TAG_DOUBLE:
DO_ALIGNED_COPY(&value->v_double, &rinfo->typelib->data[blob->offset], gdouble);
break;
}
}
}
return blob->size;
}
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