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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
* GObject introspection: Enum 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 "config.h"
#include <glib.h>
#include <girepository.h>
#include "girepository-private.h"
#include "gitypelib-internal.h"
/**
* SECTION:gienuminfo
* @title: GIEnumInfo
* @short_description: Structs representing an enumeration and its values
*
* A GIEnumInfo represents an enumeration and a GIValueInfo struct represents a value
* of an enumeration. The GIEnumInfo contains a set of values and a type
* The GIValueInfo is fetched by calling g_enum_info_get_value() on a #GIEnumInfo.
*
* <refsect1 id="gi-gienuminfo.struct-hierarchy" role="struct_hierarchy">
* <title role="struct_hierarchy.title">Struct hierarchy</title>
* <synopsis>
* <link linkend="GIBaseInfo">GIBaseInfo</link>
* +----<link linkend="gi-GIRegisteredTypeInfo">GIRegisteredTypeInfo</link>
* +----GIEnumInfo
* </synopsis>
* </refsect1>
*/
/**
* g_enum_info_get_n_values:
* @info: a #GIEnumInfo
*
* Obtain the number of values this enumeration contains.
*
* Returns: the number of enumeration values
*/
gint
g_enum_info_get_n_values (GIEnumInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
EnumBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_ENUM_INFO (info), 0);
blob = (EnumBlob *)&rinfo->typelib->data[rinfo->offset];
return blob->n_values;
}
/**
* g_enum_info_get_error_domain:
* @info: a #GIEnumInfo
*
* Obtain the string form of the quark for the error domain associated with
* this enum, if any.
*
* Returns: (transfer none): the string form of the error domain associated
* with this enum, or %NULL.
* Since: 1.30
*/
const gchar *
g_enum_info_get_error_domain (GIEnumInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
EnumBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_ENUM_INFO (info), 0);
blob = (EnumBlob *)&rinfo->typelib->data[rinfo->offset];
if (blob->error_domain)
return g_typelib_get_string (rinfo->typelib, blob->error_domain);
else
return NULL;
}
/**
* g_enum_info_get_value:
* @info: a #GIEnumInfo
* @n: index of value to fetch
*
* Obtain a value for this enumeration.
*
* Returns: (transfer full): the enumeration value or %NULL if type tag is wrong,
* free the struct with g_base_info_unref() when done.
*/
GIValueInfo *
g_enum_info_get_value (GIEnumInfo *info,
gint n)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
Header *header;
gint offset;
g_return_val_if_fail (info != NULL, NULL);
g_return_val_if_fail (GI_IS_ENUM_INFO (info), NULL);
header = (Header *)rinfo->typelib->data;
offset = rinfo->offset + header->enum_blob_size
+ n * header->value_blob_size;
return (GIValueInfo *) g_info_new (GI_INFO_TYPE_VALUE, (GIBaseInfo*)info, rinfo->typelib, offset);
}
/**
* g_enum_info_get_n_methods:
* @info: a #GIEnumInfo
*
* Obtain the number of methods that this enum type has.
*
* Returns: number of methods
* Since: 1.30
*/
gint
g_enum_info_get_n_methods (GIEnumInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
EnumBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_ENUM_INFO (info), 0);
blob = (EnumBlob *)&rinfo->typelib->data[rinfo->offset];
return blob->n_methods;
}
/**
* g_enum_info_get_method:
* @info: a #GIEnumInfo
* @n: index of method to get
*
* Obtain an enum type method at index @n.
*
* Returns: (transfer full): the #GIFunctionInfo. Free the struct by calling
* g_base_info_unref() when done.
* Since: 1.30
*/
GIFunctionInfo *
g_enum_info_get_method (GIEnumInfo *info,
gint n)
{
gint offset;
GIRealInfo *rinfo = (GIRealInfo *)info;
Header *header;
EnumBlob *blob;
g_return_val_if_fail (info != NULL, NULL);
g_return_val_if_fail (GI_IS_ENUM_INFO (info), NULL);
header = (Header *)rinfo->typelib->data;
blob = (EnumBlob *)&rinfo->typelib->data[rinfo->offset];
offset = rinfo->offset + header->enum_blob_size
+ blob->n_values * header->value_blob_size
+ n * header->function_blob_size;
return (GIFunctionInfo *) g_info_new (GI_INFO_TYPE_FUNCTION, (GIBaseInfo*)info,
rinfo->typelib, offset);
}
/**
* g_enum_info_get_storage_type:
* @info: a #GIEnumInfo
*
* Obtain the tag of the type used for the enum in the C ABI. This will
* will be a signed or unsigned integral type.
*
* Note that in the current implementation the width of the type is
* computed correctly, but the signed or unsigned nature of the type
* may not match the sign of the type used by the C compiler.
*
* Returns: the storage type for the enumeration
*/
GITypeTag
g_enum_info_get_storage_type (GIEnumInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
EnumBlob *blob;
g_return_val_if_fail (info != NULL, GI_TYPE_TAG_BOOLEAN);
g_return_val_if_fail (GI_IS_ENUM_INFO (info), GI_TYPE_TAG_BOOLEAN);
blob = (EnumBlob *)&rinfo->typelib->data[rinfo->offset];
return blob->storage_type;
}
/**
* g_value_info_get_value:
* @info: a #GIValueInfo
*
* Obtain the enumeration value of the #GIValueInfo.
*
* Returns: the enumeration value. This will always be representable
* as a 32-bit signed or unsigned value. The use of gint64 as the
* return type is to allow both.
*/
gint64
g_value_info_get_value (GIValueInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
ValueBlob *blob;
g_return_val_if_fail (info != NULL, -1);
g_return_val_if_fail (GI_IS_VALUE_INFO (info), -1);
blob = (ValueBlob *)&rinfo->typelib->data[rinfo->offset];
if (blob->unsigned_value)
return (gint64)(guint32)blob->value;
else
return (gint64)blob->value;
}
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