/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- * GObject introspection: Struct implementation * * Copyright (C) 2005 Matthias Clasen * Copyright (C) 2008,2009 Red Hat, Inc. * * SPDX-License-Identifier: LGPL-2.1-or-later * * 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 #include #include #include "girepository-private.h" #include "gitypelib-internal.h" #include "gistructinfo.h" /** * SECTION:gistructinfo * @title: GIStructInfo * @short_description: Struct representing a C structure * * GIStructInfo represents a generic C structure type. * * A structure has methods and fields. */ /** * g_struct_info_get_n_fields: * @info: a #GIStructInfo * * Obtain the number of fields this structure has. * * Returns: number of fields */ gint g_struct_info_get_n_fields (GIStructInfo *info) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; return blob->n_fields; } /** * g_struct_info_get_field_offset: * @info: a #GIStructInfo * @n: index of queried field * * Obtain the offset of the specified field. * * Returns: field offset in bytes */ static gint32 g_struct_get_field_offset (GIStructInfo *info, gint n) { GIRealInfo *rinfo = (GIRealInfo *)info; Header *header = (Header *)rinfo->typelib->data; guint32 offset = rinfo->offset + header->struct_blob_size; gint i; FieldBlob *field_blob; for (i = 0; i < n; i++) { field_blob = (FieldBlob *)&rinfo->typelib->data[offset]; offset += header->field_blob_size; if (field_blob->has_embedded_type) offset += header->callback_blob_size; } return offset; } /** * g_struct_info_get_field: * @info: a #GIStructInfo * @n: a field index * * Obtain the type information for field with specified index. * * Returns: (transfer full): the #GIFieldInfo, free it with g_base_info_unref() * when done. */ GIFieldInfo * g_struct_info_get_field (GIStructInfo *info, gint n) { GIRealInfo *rinfo = (GIRealInfo *)info; return (GIFieldInfo *) g_info_new (GI_INFO_TYPE_FIELD, (GIBaseInfo*)info, rinfo->typelib, g_struct_get_field_offset (info, n)); } /** * g_struct_info_find_field: * @info: a #GIStructInfo * @name: a field name * * Obtain the type information for field named @name. * * Since: 1.46 * Returns: (transfer full): the #GIFieldInfo or %NULL if not found, * free it with g_base_info_unref() when done. */ GIFieldInfo * g_struct_info_find_field (GIStructInfo *info, const gchar *name) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; Header *header = (Header *)rinfo->typelib->data; guint32 offset = rinfo->offset + header->struct_blob_size; gint i; for (i = 0; i < blob->n_fields; i++) { FieldBlob *field_blob = (FieldBlob *)&rinfo->typelib->data[offset]; const gchar *fname = (const gchar *)&rinfo->typelib->data[field_blob->name]; if (strcmp (name, fname) == 0) { return (GIFieldInfo *) g_info_new (GI_INFO_TYPE_FIELD, (GIBaseInfo* )info, rinfo->typelib, offset); } offset += header->field_blob_size; if (field_blob->has_embedded_type) offset += header->callback_blob_size; } return NULL; } /** * g_struct_info_get_n_methods: * @info: a #GIStructInfo * * Obtain the number of methods this structure has. * * Returns: number of methods */ gint g_struct_info_get_n_methods (GIStructInfo *info) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; return blob->n_methods; } /** * g_struct_info_get_method: * @info: a #GIStructInfo * @n: a method index * * Obtain the type information for method with specified index. * * Returns: (transfer full): the #GIFunctionInfo, free it with g_base_info_unref() * when done. */ GIFunctionInfo * g_struct_info_get_method (GIStructInfo *info, gint n) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; Header *header = (Header *)rinfo->typelib->data; gint offset; offset = g_struct_get_field_offset (info, blob->n_fields) + n * header->function_blob_size; return (GIFunctionInfo *) g_info_new (GI_INFO_TYPE_FUNCTION, (GIBaseInfo*)info, rinfo->typelib, offset); } /** * g_struct_info_find_method: * @info: a #GIStructInfo * @name: a method name * * Obtain the type information for method named @name. * * Returns: (transfer full): the #GIFunctionInfo, free it with g_base_info_unref() * when done. */ GIFunctionInfo * g_struct_info_find_method (GIStructInfo *info, const gchar *name) { gint offset; GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; offset = g_struct_get_field_offset (info, blob->n_fields); return _g_base_info_find_method ((GIBaseInfo*)info, offset, blob->n_methods, name); } /** * g_struct_info_get_size: * @info: a #GIStructInfo * * Obtain the total size of the structure. * * Returns: size of the structure in bytes */ gsize g_struct_info_get_size (GIStructInfo *info) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; return blob->size; } /** * g_struct_info_get_alignment: * @info: a #GIStructInfo * * Obtain the required alignment of the structure. * * Returns: required alignment in bytes */ gsize g_struct_info_get_alignment (GIStructInfo *info) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; return blob->alignment; } /** * g_struct_info_is_foreign: * @info: TODO * * TODO * * Returns: TODO */ gboolean g_struct_info_is_foreign (GIStructInfo *info) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; return blob->foreign; } /** * g_struct_info_is_gtype_struct: * @info: a #GIStructInfo * * Return true if this structure represents the "class structure" for some * #GObject or #GInterface. This function is mainly useful to hide this kind of structure * from generated public APIs. * * Returns: %TRUE if this is a class struct, %FALSE otherwise */ gboolean g_struct_info_is_gtype_struct (GIStructInfo *info) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; return blob->is_gtype_struct; } /** * g_struct_info_get_copy_function: * @info: a struct information blob * * Retrieves the name of the copy function for @info, if any is set. * * Returns: (transfer none) (nullable): the name of the copy function * * Since: 1.76 */ const char * g_struct_info_get_copy_function (GIStructInfo *info) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob; g_return_val_if_fail (info != NULL, NULL); g_return_val_if_fail (GI_IS_STRUCT_INFO (info), NULL); blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; if (blob->copy_func) return g_typelib_get_string (rinfo->typelib, blob->copy_func); return NULL; } /** * g_struct_info_get_free_function: * @info: a struct information blob * * Retrieves the name of the free function for @info, if any is set. * * Returns: (transfer none) (nullable): the name of the free function * * Since: 1.76 */ const char * g_struct_info_get_free_function (GIStructInfo *info) { GIRealInfo *rinfo = (GIRealInfo *)info; StructBlob *blob; g_return_val_if_fail (info != NULL, NULL); g_return_val_if_fail (GI_IS_STRUCT_INFO (info), NULL); blob = (StructBlob *)&rinfo->typelib->data[rinfo->offset]; if (blob->free_func) return g_typelib_get_string (rinfo->typelib, blob->free_func); return NULL; }