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137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/* GObject introspection: Enum implementation
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*
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* Copyright (C) 2005 Matthias Clasen
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* Copyright (C) 2008,2009 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <glib.h>
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#include <girepository.h>
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#include "girepository-private.h"
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#include "gitypelib-internal.h"
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/**
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* SECTION:gienuminfo
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* @Short_description: Structs representing an enumeration and its values
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* @Title: GIEnumInfo
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*
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* A GIEnumInfo represents an enumeration and a GIValueInfo struct represents a value
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* of an enumeration. The GIEnumInfo contains a set of values and a type
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* The GIValueInfo is fetched by calling g_enum_info_get_value() on a #GIEnumInfo.
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*/
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/**
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* g_enum_info_get_n_values:
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* @info: a #GIEnumInfo
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*
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* Obtain the number of values this enumeration contains.
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*
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* Returns: the number of enumeration values
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*/
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gint
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g_enum_info_get_n_values (GIEnumInfo *info)
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{
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GIRealInfo *rinfo = (GIRealInfo *)info;
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EnumBlob *blob;
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g_return_val_if_fail (info != NULL, 0);
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g_return_val_if_fail (GI_IS_ENUM_INFO (info), 0);
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blob = (EnumBlob *)&rinfo->typelib->data[rinfo->offset];
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return blob->n_values;
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}
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/**
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* g_enum_info_get_value:
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* @info: a #GIEnumInfo
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* @n: index of value to fetch
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*
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* Obtain a value for this enumeration.
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*
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* Returns: (transfer full): the enumeration value or %NULL if type tag is wrong,
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* free the struct with g_base_info_unref() when done.
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*/
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GIValueInfo *
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g_enum_info_get_value (GIEnumInfo *info,
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gint n)
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{
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GIRealInfo *rinfo = (GIRealInfo *)info;
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Header *header;
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gint offset;
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g_return_val_if_fail (info != NULL, NULL);
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g_return_val_if_fail (GI_IS_ENUM_INFO (info), NULL);
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header = (Header *)rinfo->typelib->data;
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offset = rinfo->offset + header->enum_blob_size
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+ n * header->value_blob_size;
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return (GIValueInfo *) g_info_new (GI_INFO_TYPE_VALUE, (GIBaseInfo*)info, rinfo->typelib, offset);
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}
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/**
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* g_enum_info_get_storage_type:
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* @info: a #GIEnumInfo
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*
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* Obtain the tag of the type used for the enum in the C ABI. This will
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* will be a signed or unsigned integral type.
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* Note that in the current implementation the width of the type is
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* computed correctly, but the signed or unsigned nature of the type
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* may not match the sign of the type used by the C compiler.
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*
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* Return Value: the storage type for the enumeration
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*/
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GITypeTag
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g_enum_info_get_storage_type (GIEnumInfo *info)
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{
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GIRealInfo *rinfo = (GIRealInfo *)info;
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EnumBlob *blob;
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g_return_val_if_fail (info != NULL, GI_TYPE_TAG_BOOLEAN);
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g_return_val_if_fail (GI_IS_ENUM_INFO (info), GI_TYPE_TAG_BOOLEAN);
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blob = (EnumBlob *)&rinfo->typelib->data[rinfo->offset];
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return blob->storage_type;
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}
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/**
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* g_value_info_get_value:
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* @info: a #GIValueInfo
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*
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* Obtain the enumeration value of the #GIValueInfo.
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*
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* Returns: the enumeration value
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*/
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glong
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g_value_info_get_value (GIValueInfo *info)
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{
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GIRealInfo *rinfo = (GIRealInfo *)info;
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ValueBlob *blob;
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g_return_val_if_fail (info != NULL, -1);
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g_return_val_if_fail (GI_IS_VALUE_INFO (info), -1);
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blob = (ValueBlob *)&rinfo->typelib->data[rinfo->offset];
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return (glong)blob->value;
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}
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