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glib/girepository/gifieldinfo.c
Philip Withnall 2b544c3f66 girepository: Remove _ prefix from private functions 
Now that libgirepository uses `GI_AVAILABLE_IN_*` macros, that’s what
controls symbol visibility. The `_` prefixes are redundant, and out of
keeping with the rest of GLib.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

Helps: #3155
2023-11-08 15:23:31 +00:00

557 lines
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
* GObject introspection: Field 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 <glib.h>
#include <girepository/girepository.h>
#include "girepository-private.h"
#include "gitypelib-internal.h"
#include "config.h"
#include "gifieldinfo.h"
/**
* SECTION:gifieldinfo
* @title: GIFieldInfo
* @short_description: Struct representing a struct or union field
*
* A GIFieldInfo struct represents a field of a struct, union, or object.
*
* The GIFieldInfo is fetched by calling gi_struct_info_get_field(),
* gi_union_info_get_field() or gi_object_info_get_field().
*
* A field has a size, type and a struct offset asssociated and a set of flags,
* which are currently #GI_FIELD_IS_READABLE or #GI_FIELD_IS_WRITABLE.
*
* See also: #GIStructInfo, #GIUnionInfo, #GIObjectInfo
*/
/**
* gi_field_info_get_flags:
* @info: a #GIFieldInfo
*
* Obtain the flags for this #GIFieldInfo. See #GIFieldInfoFlags for possible
* flag values.
*
* Returns: the flags
*/
GIFieldInfoFlags
gi_field_info_get_flags (GIFieldInfo *info)
{
GIFieldInfoFlags flags;
GIRealInfo *rinfo = (GIRealInfo *)info;
FieldBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_FIELD_INFO (info), 0);
blob = (FieldBlob *)&rinfo->typelib->data[rinfo->offset];
flags = 0;
if (blob->readable)
flags = flags | GI_FIELD_IS_READABLE;
if (blob->writable)
flags = flags | GI_FIELD_IS_WRITABLE;
return flags;
}
/**
* gi_field_info_get_size:
* @info: a #GIFieldInfo
*
* Obtain the size in bits of the field member, this is how
* much space you need to allocate to store the field.
*
* Returns: the field size
*/
gint
gi_field_info_get_size (GIFieldInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
FieldBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_FIELD_INFO (info), 0);
blob = (FieldBlob *)&rinfo->typelib->data[rinfo->offset];
return blob->bits;
}
/**
* gi_field_info_get_offset:
* @info: a #GIFieldInfo
*
* Obtain the offset in bytes of the field member, this is relative
* to the beginning of the struct or union.
*
* Returns: the field offset
*/
gint
gi_field_info_get_offset (GIFieldInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
FieldBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_FIELD_INFO (info), 0);
blob = (FieldBlob *)&rinfo->typelib->data[rinfo->offset];
return blob->struct_offset;
}
/**
* gi_field_info_get_type:
* @info: a #GIFieldInfo
*
* Obtain the type of a field as a #GITypeInfo.
*
* Returns: (transfer full): the #GITypeInfo. Free the struct by calling
* gi_base_info_unref() when done.
*/
GITypeInfo *
gi_field_info_get_type (GIFieldInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
Header *header = (Header *)rinfo->typelib->data;
FieldBlob *blob;
GIRealInfo *type_info;
g_return_val_if_fail (info != NULL, NULL);
g_return_val_if_fail (GI_IS_FIELD_INFO (info), NULL);
blob = (FieldBlob *)&rinfo->typelib->data[rinfo->offset];
if (blob->has_embedded_type)
{
type_info = (GIRealInfo *) gi_info_new (GI_INFO_TYPE_TYPE,
(GIBaseInfo*)info, rinfo->typelib,
rinfo->offset + header->field_blob_size);
type_info->type_is_embedded = TRUE;
}
else
return gi_type_info_new ((GIBaseInfo*)info, rinfo->typelib, rinfo->offset + G_STRUCT_OFFSET (FieldBlob, type));
return (GIBaseInfo*)type_info;
}
/**
* gi_field_info_get_field: (skip)
* @field_info: a #GIFieldInfo
* @mem: pointer to a block of memory representing a C structure or union
* @value: a #GIArgument into which to store the value retrieved
*
* Reads a field identified by a #GIFieldInfo from a C structure or
* union. This only handles fields of simple C types. It will fail
* for a field of a composite type like a nested structure or union
* even if that is actually readable.
*
* Returns: %TRUE if reading the field succeeded, otherwise %FALSE
*/
gboolean
gi_field_info_get_field (GIFieldInfo *field_info,
gpointer mem,
GIArgument *value)
{
int offset;
GITypeInfo *type_info;
gboolean result = FALSE;
g_return_val_if_fail (field_info != NULL, FALSE);
g_return_val_if_fail (GI_IS_FIELD_INFO (field_info), FALSE);
if ((gi_field_info_get_flags (field_info) & GI_FIELD_IS_READABLE) == 0)
return FALSE;
offset = gi_field_info_get_offset (field_info);
type_info = gi_field_info_get_type (field_info);
if (gi_type_info_is_pointer (type_info))
{
value->v_pointer = G_STRUCT_MEMBER (gpointer, mem, offset);
result = TRUE;
}
else
{
switch (gi_type_info_get_tag (type_info))
{
case GI_TYPE_TAG_VOID:
g_warning("Field %s: should not be have void type",
gi_base_info_get_name ((GIBaseInfo *)field_info));
break;
case GI_TYPE_TAG_BOOLEAN:
value->v_boolean = G_STRUCT_MEMBER (gboolean, mem, offset) != FALSE;
result = TRUE;
break;
case GI_TYPE_TAG_INT8:
case GI_TYPE_TAG_UINT8:
value->v_uint8 = G_STRUCT_MEMBER (guint8, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_INT16:
case GI_TYPE_TAG_UINT16:
value->v_uint16 = G_STRUCT_MEMBER (guint16, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_INT32:
case GI_TYPE_TAG_UINT32:
case GI_TYPE_TAG_UNICHAR:
value->v_uint32 = G_STRUCT_MEMBER (guint32, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_INT64:
case GI_TYPE_TAG_UINT64:
value->v_uint64 = G_STRUCT_MEMBER (guint64, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_GTYPE:
value->v_size = G_STRUCT_MEMBER (gsize, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_FLOAT:
value->v_float = G_STRUCT_MEMBER (gfloat, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_DOUBLE:
value->v_double = G_STRUCT_MEMBER (gdouble, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_ARRAY:
/* We don't check the array type and that it is fixed-size,
we trust g-ir-compiler to do the right thing */
value->v_pointer = G_STRUCT_MEMBER_P (mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_UTF8:
case GI_TYPE_TAG_FILENAME:
case GI_TYPE_TAG_GLIST:
case GI_TYPE_TAG_GSLIST:
case GI_TYPE_TAG_GHASH:
g_warning("Field %s: type %s should have is_pointer set",
gi_base_info_get_name ((GIBaseInfo *)field_info),
gi_type_tag_to_string (gi_type_info_get_tag (type_info)));
break;
case GI_TYPE_TAG_ERROR:
/* Needs to be handled by the language binding directly */
break;
case GI_TYPE_TAG_INTERFACE:
{
GIBaseInfo *interface = gi_type_info_get_interface (type_info);
switch (gi_base_info_get_type (interface))
{
case GI_INFO_TYPE_STRUCT:
case GI_INFO_TYPE_UNION:
case GI_INFO_TYPE_BOXED:
/* Needs to be handled by the language binding directly */
break;
case GI_INFO_TYPE_OBJECT:
break;
case GI_INFO_TYPE_ENUM:
case GI_INFO_TYPE_FLAGS:
{
/* FIXME: there's a mismatch here between the value->v_int we use
* here and the gint64 result returned from gi_value_info_get_value().
* But to switch this to gint64, we'd have to make gi_function_info_invoke()
* translate value->v_int64 to the proper ABI for an enum function
* call parameter, which will usually be int, and then fix up language
* bindings.
*/
GITypeTag storage_type = gi_enum_info_get_storage_type ((GIEnumInfo *)interface);
switch (storage_type)
{
case GI_TYPE_TAG_INT8:
case GI_TYPE_TAG_UINT8:
value->v_int = (gint)G_STRUCT_MEMBER (guint8, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_INT16:
case GI_TYPE_TAG_UINT16:
value->v_int = (gint)G_STRUCT_MEMBER (guint16, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_INT32:
case GI_TYPE_TAG_UINT32:
value->v_int = (gint)G_STRUCT_MEMBER (guint32, mem, offset);
result = TRUE;
break;
case GI_TYPE_TAG_INT64:
case GI_TYPE_TAG_UINT64:
value->v_int = (gint)G_STRUCT_MEMBER (guint64, mem, offset);
result = TRUE;
break;
default:
g_warning("Field %s: Unexpected enum storage type %s",
gi_base_info_get_name ((GIBaseInfo *)field_info),
gi_type_tag_to_string (storage_type));
break;
}
break;
}
case GI_INFO_TYPE_VFUNC:
case GI_INFO_TYPE_CALLBACK:
g_warning("Field %s: Interface type %d should have is_pointer set",
gi_base_info_get_name ((GIBaseInfo *)field_info),
gi_base_info_get_type (interface));
break;
case GI_INFO_TYPE_INVALID:
case GI_INFO_TYPE_INTERFACE:
case GI_INFO_TYPE_FUNCTION:
case GI_INFO_TYPE_CONSTANT:
case GI_INFO_TYPE_INVALID_0:
case GI_INFO_TYPE_VALUE:
case GI_INFO_TYPE_SIGNAL:
case GI_INFO_TYPE_PROPERTY:
case GI_INFO_TYPE_FIELD:
case GI_INFO_TYPE_ARG:
case GI_INFO_TYPE_TYPE:
case GI_INFO_TYPE_UNRESOLVED:
g_warning("Field %s: Interface type %d not expected",
gi_base_info_get_name ((GIBaseInfo *)field_info),
gi_base_info_get_type (interface));
break;
default:
break;
}
gi_base_info_unref ((GIBaseInfo *)interface);
break;
}
break;
default:
break;
}
}
gi_base_info_unref ((GIBaseInfo *)type_info);
return result;
}
/**
* gi_field_info_set_field: (skip)
* @field_info: a #GIFieldInfo
* @mem: pointer to a block of memory representing a C structure or union
* @value: a #GIArgument holding the value to store
*
* Writes a field identified by a #GIFieldInfo to a C structure or
* union. This only handles fields of simple C types. It will fail
* for a field of a composite type like a nested structure or union
* even if that is actually writable. Note also that that it will refuse
* to write fields where memory management would by required. A field
* with a type such as 'char *' must be set with a setter function.
*
* Returns: %TRUE if writing the field succeeded, otherwise %FALSE
*/
gboolean
gi_field_info_set_field (GIFieldInfo *field_info,
gpointer mem,
const GIArgument *value)
{
int offset;
GITypeInfo *type_info;
gboolean result = FALSE;
g_return_val_if_fail (field_info != NULL, FALSE);
g_return_val_if_fail (GI_IS_FIELD_INFO (field_info), FALSE);
if ((gi_field_info_get_flags (field_info) & GI_FIELD_IS_WRITABLE) == 0)
return FALSE;
offset = gi_field_info_get_offset (field_info);
type_info = gi_field_info_get_type (field_info);
if (!gi_type_info_is_pointer (type_info))
{
switch (gi_type_info_get_tag (type_info))
{
case GI_TYPE_TAG_VOID:
g_warning("Field %s: should not be have void type",
gi_base_info_get_name ((GIBaseInfo *)field_info));
break;
case GI_TYPE_TAG_BOOLEAN:
G_STRUCT_MEMBER (gboolean, mem, offset) = value->v_boolean != FALSE;
result = TRUE;
break;
case GI_TYPE_TAG_INT8:
case GI_TYPE_TAG_UINT8:
G_STRUCT_MEMBER (guint8, mem, offset) = value->v_uint8;
result = TRUE;
break;
case GI_TYPE_TAG_INT16:
case GI_TYPE_TAG_UINT16:
G_STRUCT_MEMBER (guint16, mem, offset) = value->v_uint16;
result = TRUE;
break;
case GI_TYPE_TAG_INT32:
case GI_TYPE_TAG_UINT32:
case GI_TYPE_TAG_UNICHAR:
G_STRUCT_MEMBER (guint32, mem, offset) = value->v_uint32;
result = TRUE;
break;
case GI_TYPE_TAG_INT64:
case GI_TYPE_TAG_UINT64:
G_STRUCT_MEMBER (guint64, mem, offset) = value->v_uint64;
result = TRUE;
break;
case GI_TYPE_TAG_GTYPE:
G_STRUCT_MEMBER (gsize, mem, offset) = value->v_size;
result = TRUE;
break;
case GI_TYPE_TAG_FLOAT:
G_STRUCT_MEMBER (gfloat, mem, offset) = value->v_float;
result = TRUE;
break;
case GI_TYPE_TAG_DOUBLE:
G_STRUCT_MEMBER (gdouble, mem, offset)= value->v_double;
result = TRUE;
break;
case GI_TYPE_TAG_UTF8:
case GI_TYPE_TAG_FILENAME:
case GI_TYPE_TAG_ARRAY:
case GI_TYPE_TAG_GLIST:
case GI_TYPE_TAG_GSLIST:
case GI_TYPE_TAG_GHASH:
g_warning("Field %s: type %s should have is_pointer set",
gi_base_info_get_name ((GIBaseInfo *)field_info),
gi_type_tag_to_string (gi_type_info_get_tag (type_info)));
break;
case GI_TYPE_TAG_ERROR:
/* Needs to be handled by the language binding directly */
break;
case GI_TYPE_TAG_INTERFACE:
{
GIBaseInfo *interface = gi_type_info_get_interface (type_info);
switch (gi_base_info_get_type (interface))
{
case GI_INFO_TYPE_STRUCT:
case GI_INFO_TYPE_UNION:
case GI_INFO_TYPE_BOXED:
/* Needs to be handled by the language binding directly */
break;
case GI_INFO_TYPE_OBJECT:
break;
case GI_INFO_TYPE_ENUM:
case GI_INFO_TYPE_FLAGS:
{
/* See FIXME above
*/
GITypeTag storage_type = gi_enum_info_get_storage_type ((GIEnumInfo *)interface);
switch (storage_type)
{
case GI_TYPE_TAG_INT8:
case GI_TYPE_TAG_UINT8:
G_STRUCT_MEMBER (guint8, mem, offset) = (guint8)value->v_int;
result = TRUE;
break;
case GI_TYPE_TAG_INT16:
case GI_TYPE_TAG_UINT16:
G_STRUCT_MEMBER (guint16, mem, offset) = (guint16)value->v_int;
result = TRUE;
break;
case GI_TYPE_TAG_INT32:
case GI_TYPE_TAG_UINT32:
G_STRUCT_MEMBER (guint32, mem, offset) = (guint32)value->v_int;
result = TRUE;
break;
case GI_TYPE_TAG_INT64:
case GI_TYPE_TAG_UINT64:
G_STRUCT_MEMBER (guint64, mem, offset) = (guint64)value->v_int;
result = TRUE;
break;
default:
g_warning("Field %s: Unexpected enum storage type %s",
gi_base_info_get_name ((GIBaseInfo *)field_info),
gi_type_tag_to_string (storage_type));
break;
}
break;
}
break;
case GI_INFO_TYPE_VFUNC:
case GI_INFO_TYPE_CALLBACK:
g_warning("Field%s: Interface type %d should have is_pointer set",
gi_base_info_get_name ((GIBaseInfo *)field_info),
gi_base_info_get_type (interface));
break;
case GI_INFO_TYPE_INVALID:
case GI_INFO_TYPE_INTERFACE:
case GI_INFO_TYPE_FUNCTION:
case GI_INFO_TYPE_CONSTANT:
case GI_INFO_TYPE_INVALID_0:
case GI_INFO_TYPE_VALUE:
case GI_INFO_TYPE_SIGNAL:
case GI_INFO_TYPE_PROPERTY:
case GI_INFO_TYPE_FIELD:
case GI_INFO_TYPE_ARG:
case GI_INFO_TYPE_TYPE:
case GI_INFO_TYPE_UNRESOLVED:
g_warning("Field %s: Interface type %d not expected",
gi_base_info_get_name ((GIBaseInfo *)field_info),
gi_base_info_get_type (interface));
break;
default:
break;
}
gi_base_info_unref ((GIBaseInfo *)interface);
break;
}
break;
default:
break;
}
} else {
switch (gi_type_info_get_tag (type_info))
{
case GI_TYPE_TAG_INTERFACE:
{
GIBaseInfo *interface = gi_type_info_get_interface (type_info);
switch (gi_base_info_get_type (interface))
{
case GI_INFO_TYPE_OBJECT:
case GI_INFO_TYPE_INTERFACE:
G_STRUCT_MEMBER (gpointer, mem, offset) = (gpointer)value->v_pointer;
result = TRUE;
break;
default:
break;
}
gi_base_info_unref ((GIBaseInfo *)interface);
}
break;
default:
break;
}
}
gi_base_info_unref ((GIBaseInfo *)type_info);
return result;
}
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