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/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 1998, 1999, 2000 Tim Janik and 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.
*
* gvaluecollector.h: GValue varargs stubs
*/
#ifndef __G_VALUE_COLLECTOR_H__
#define __G_VALUE_COLLECTOR_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* we may want to add aggregate types here some day, if requested
* by users. the basic C types are covered already, everything
* smaller than an int is promoted to an integer and floats are
* always promoted to doubles for varargs call constructions.
*/
enum /*< skip >*/
{
G_VALUE_COLLECT_INT = 'i',
G_VALUE_COLLECT_LONG = 'l',
G_VALUE_COLLECT_DOUBLE = 'd',
G_VALUE_COLLECT_POINTER = 'p'
};
/* vararg union holding actuall values collected
*/
union _GTypeCValue
{
gint v_int;
glong v_long;
gdouble v_double;
gpointer v_pointer;
};
/* G_VALUE_COLLECT() collects a variable argument value
* from a va_list. we have to implement the varargs collection as a
* macro, because on some systems va_list variables cannot be passed
* by reference.
* value is supposed to be initialized according to the value
* type to be collected.
* var_args is the va_list variable and may be evaluated multiple times.
* __error is a gchar** variable that will be modified to hold a g_new()
* allocated error messages if something fails.
*/
#define G_VALUE_COLLECT(value, var_args, flags, __error) \
G_STMT_START { \
GValue *_value = (value); \
guint _flags = (flags); \
GTypeValueTable *_vtable = g_type_value_table_peek (G_VALUE_TYPE (_value)); \
gchar *_collect_format = _vtable->collect_format; \
GTypeCValue _cvalues[G_VALUE_COLLECT_FORMAT_MAX_LENGTH] = { { 0, }, }; \
guint _n_values = 0; \
\
g_value_reset (_value); \
while (*_collect_format) \
{ \
GTypeCValue *_cvalue = _cvalues + _n_values++; \
\
switch (*_collect_format++) \
{ \
case G_VALUE_COLLECT_INT: \
_cvalue->v_int = va_arg ((var_args), gint); \
break; \
case G_VALUE_COLLECT_LONG: \
_cvalue->v_long = va_arg ((var_args), glong); \
break; \
case G_VALUE_COLLECT_DOUBLE: \
_cvalue->v_double = va_arg ((var_args), gdouble); \
break; \
case G_VALUE_COLLECT_POINTER: \
_cvalue->v_pointer = va_arg ((var_args), gpointer); \
break; \
default: \
g_assert_not_reached (); \
} \
} \
*(__error) = _vtable->collect_value (_value, \
_n_values, \
_cvalues, \
_flags); \
} G_STMT_END
/* G_VALUE_LCOPY() collects a value's variable argument
* locations from a va_list. usage is analogous to G_VALUE_COLLECT().
*/
#define G_VALUE_LCOPY(value, var_args, flags, __error) \
G_STMT_START { \
GValue *_value = (value); \
guint _flags = (flags); \
GTypeValueTable *_vtable = g_type_value_table_peek (G_VALUE_TYPE (_value)); \
gchar *_lcopy_format = _vtable->lcopy_format; \
GTypeCValue _cvalues[G_VALUE_COLLECT_FORMAT_MAX_LENGTH] = { { 0, }, }; \
guint _n_values = 0; \
\
while (*_lcopy_format) \
{ \
GTypeCValue *_cvalue = _cvalues + _n_values++; \
\
switch (*_lcopy_format++) \
{ \
case G_VALUE_COLLECT_INT: \
_cvalue->v_int = va_arg ((var_args), gint); \
break; \
case G_VALUE_COLLECT_LONG: \
_cvalue->v_long = va_arg ((var_args), glong); \
break; \
case G_VALUE_COLLECT_DOUBLE: \
_cvalue->v_double = va_arg ((var_args), gdouble); \
break; \
case G_VALUE_COLLECT_POINTER: \
_cvalue->v_pointer = va_arg ((var_args), gpointer); \
break; \
default: \
g_assert_not_reached (); \
} \
} \
*(__error) = _vtable->lcopy_value (_value, \
_n_values, \
_cvalues, \
_flags); \
} G_STMT_END
#define G_VALUE_COLLECT_FORMAT_MAX_LENGTH (8)
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __G_VALUE_COLLECTOR_H__ */
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