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/* -*- Mode: C; c-basic-offset: 4 -*-
* pygtk- Python bindings for the GTK toolkit.
* Copyright (C) 2007 Johan Dahlin
*
* ffi-marshaller: Generic CMarshaller using libffi
*
* 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 2.1 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#include <glib-object.h>
#include <ffi.h>
static ffi_type *
g_value_to_ffi_type (const GValue *gvalue, gpointer *value)
{
ffi_type *rettype = NULL;
GType type = g_type_fundamental (G_VALUE_TYPE (gvalue));
g_assert (type != G_TYPE_INVALID);
switch (type) {
case G_TYPE_BOOLEAN:
case G_TYPE_CHAR:
case G_TYPE_INT:
rettype = &ffi_type_sint;
*value = (gpointer)&(gvalue->data[0].v_int);
break;
case G_TYPE_UCHAR:
case G_TYPE_UINT:
rettype = &ffi_type_uint;
*value = (gpointer)&(gvalue->data[0].v_uint);
break;
case G_TYPE_STRING:
case G_TYPE_OBJECT:
case G_TYPE_BOXED:
case G_TYPE_POINTER:
rettype = &ffi_type_pointer;
*value = (gpointer)&(gvalue->data[0].v_pointer);
break;
case G_TYPE_FLOAT:
rettype = &ffi_type_float;
*value = (gpointer)&(gvalue->data[0].v_float);
break;
case G_TYPE_DOUBLE:
rettype = &ffi_type_double;
*value = (gpointer)&(gvalue->data[0].v_double);
break;
case G_TYPE_LONG:
rettype = &ffi_type_slong;
*value = (gpointer)&(gvalue->data[0].v_long);
break;
case G_TYPE_ULONG:
rettype = &ffi_type_ulong;
*value = (gpointer)&(gvalue->data[0].v_ulong);
break;
case G_TYPE_INT64:
rettype = &ffi_type_sint64;
*value = (gpointer)&(gvalue->data[0].v_int64);
break;
case G_TYPE_UINT64:
rettype = &ffi_type_uint64;
*value = (gpointer)&(gvalue->data[0].v_uint64);
break;
default:
rettype = &ffi_type_pointer;
*value = NULL;
g_warning ("Unsupported fundamental type: %s", g_type_name (type));
break;
}
return rettype;
}
static void
g_value_from_ffi_type (GValue *gvalue, gpointer *value)
{
switch (g_type_fundamental (G_VALUE_TYPE (gvalue))) {
case G_TYPE_INT:
g_value_set_int (gvalue, *(gint*)value);
break;
case G_TYPE_FLOAT:
g_value_set_float (gvalue, *(gfloat*)value);
break;
case G_TYPE_DOUBLE:
g_value_set_double (gvalue, *(gdouble*)value);
break;
case G_TYPE_BOOLEAN:
g_value_set_boolean (gvalue, *(gboolean*)value);
break;
case G_TYPE_STRING:
g_value_set_string (gvalue, *(gchar**)value);
break;
case G_TYPE_CHAR:
g_value_set_char (gvalue, *(gchar*)value);
break;
case G_TYPE_UCHAR:
g_value_set_uchar (gvalue, *(guchar*)value);
break;
case G_TYPE_UINT:
g_value_set_uint (gvalue, *(guint*)value);
break;
case G_TYPE_POINTER:
g_value_set_pointer (gvalue, *(gpointer*)value);
break;
case G_TYPE_LONG:
g_value_set_long (gvalue, *(glong*)value);
break;
case G_TYPE_ULONG:
g_value_set_ulong (gvalue, *(gulong*)value);
break;
case G_TYPE_INT64:
g_value_set_int64 (gvalue, *(gint64*)value);
break;
case G_TYPE_UINT64:
g_value_set_uint64 (gvalue, *(guint64*)value);
break;
case G_TYPE_BOXED:
g_value_set_boxed (gvalue, *(gpointer*)value);
break;
default:
g_warning ("Unsupported fundamental type: %s",
g_type_name (g_type_fundamental (G_VALUE_TYPE (gvalue))));
}
}
void
g_cclosure_marshal_generic_ffi (GClosure *closure,
GValue *return_gvalue,
guint n_param_values,
const GValue *param_values,
gpointer invocation_hint,
gpointer marshal_data)
{
ffi_type *rtype;
void *rvalue;
int n_args;
ffi_type **atypes;
void **args;
int i;
ffi_cif cif;
GCClosure *cc = (GCClosure*) closure;
if (return_gvalue && G_VALUE_TYPE (return_gvalue))
{
rtype = g_value_to_ffi_type (return_gvalue, &rvalue);
}
else
{
rtype = &ffi_type_void;
}
rvalue = g_alloca (MAX (rtype->size, sizeof (ffi_arg)));
n_args = n_param_values + 1;
atypes = g_alloca (sizeof (ffi_type *) * n_args);
args = g_alloca (sizeof (gpointer) * n_args);
if (G_CCLOSURE_SWAP_DATA (closure))
{
atypes[n_args-1] = g_value_to_ffi_type (param_values + 0,
&args[n_args-1]);
atypes[0] = &ffi_type_pointer;
args[0] = &closure->data;
}
else
{
atypes[0] = g_value_to_ffi_type (param_values + 0, &args[0]);
atypes[n_args-1] = &ffi_type_pointer;
args[n_args-1] = &closure->data;
}
for (i = 1; i < n_args - 1; i++)
atypes[i] = g_value_to_ffi_type (param_values + i, &args[i]);
if (ffi_prep_cif (&cif, FFI_DEFAULT_ABI, n_args, rtype, atypes) != FFI_OK)
return;
ffi_call (&cif, marshal_data ? marshal_data : cc->callback, rvalue, args);
if (return_gvalue && G_VALUE_TYPE (return_gvalue))
g_value_from_ffi_type (return_gvalue, rvalue);
}
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