forked from AuroraMiddleware/gtk
279e878bdd
Wed Feb 24 01:22:39 CST 1999 Shawn T. Amundson <amundson@gtk.org>
* *.[ch]: Added notice to look in AUTHORS and ChangeLog files
for a list of changes.
180 lines
6.3 KiB
C
180 lines
6.3 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library 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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/*
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* Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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/* collect a single argument value from a va_list.
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* this is implemented as a huge macro <shrug>, because we can't
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* pass va_list variables by reference on some systems.
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* the corresponding prototype would be:
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* static inline gchar*
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* gtk_arg_collect_value (GtkArg *arg,
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* va_list var_args);
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*/
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#define GTK_ARG_COLLECT_VALUE(arg, var_args, _error) \
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G_STMT_START { \
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gchar *error_msg; \
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GtkType fundamental_type; \
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\
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fundamental_type = GTK_FUNDAMENTAL_TYPE (arg->type); \
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if (fundamental_type > GTK_TYPE_FUNDAMENTAL_LAST) \
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{ \
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fundamental_type = gtk_type_get_varargs_type (fundamental_type); \
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if (!fundamental_type) \
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fundamental_type = GTK_FUNDAMENTAL_TYPE (arg->type); \
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} \
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\
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error_msg = NULL; \
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switch (fundamental_type) \
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{ \
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case GTK_TYPE_INVALID: \
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error_msg = g_strdup ("invalid untyped argument"); \
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break; \
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\
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case GTK_TYPE_NONE: \
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/* we just ignore this type, since it arithmetically just requires \
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* us to not move the var_args pointer any further. callers need to \
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* check for the validity of GTK_TYPE_NONE themselves. \
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* \
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* error_msg = g_strdup ("invalid argument type `void'"); \
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*/ \
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break; \
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\
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/* everything smaller than an int is guarranteed to be \
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* passed as an int \
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*/ \
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case GTK_TYPE_CHAR: \
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GTK_VALUE_CHAR (*arg) = va_arg (var_args, gint); \
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break; \
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case GTK_TYPE_UCHAR: \
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GTK_VALUE_UCHAR (*arg) = va_arg (var_args, guint); \
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break; \
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case GTK_TYPE_BOOL: \
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GTK_VALUE_BOOL (*arg) = va_arg (var_args, gint); \
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break; \
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case GTK_TYPE_INT: \
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GTK_VALUE_INT (*arg) = va_arg (var_args, gint); \
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break; \
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case GTK_TYPE_UINT: \
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GTK_VALUE_UINT (*arg) = va_arg (var_args, guint); \
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break; \
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case GTK_TYPE_ENUM: \
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GTK_VALUE_ENUM (*arg) = va_arg (var_args, gint); \
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break; \
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case GTK_TYPE_FLAGS: \
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GTK_VALUE_FLAGS (*arg) = va_arg (var_args, guint); \
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break; \
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\
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/* we collect longs as glongs since they differ in size with \
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* integers on some platforms \
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*/ \
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case GTK_TYPE_LONG: \
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GTK_VALUE_LONG (*arg) = va_arg (var_args, glong); \
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break; \
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case GTK_TYPE_ULONG: \
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GTK_VALUE_ULONG (*arg) = va_arg (var_args, gulong); \
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break; \
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\
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/* floats are always passed as doubles \
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*/ \
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case GTK_TYPE_FLOAT: \
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/* GTK_VALUE_FLOAT (*arg) = va_arg (var_args, gfloat); */ \
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GTK_VALUE_FLOAT (*arg) = va_arg (var_args, gdouble); \
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break; \
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case GTK_TYPE_DOUBLE: \
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GTK_VALUE_DOUBLE (*arg) = va_arg (var_args, gdouble); \
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break; \
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\
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/* collect pointer values \
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*/ \
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case GTK_TYPE_STRING: \
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GTK_VALUE_STRING (*arg) = va_arg (var_args, gchar*); \
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break; \
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case GTK_TYPE_POINTER: \
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GTK_VALUE_POINTER (*arg) = va_arg (var_args, gpointer); \
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break; \
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case GTK_TYPE_BOXED: \
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GTK_VALUE_BOXED (*arg) = va_arg (var_args, gpointer); \
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break; \
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\
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/* structured types \
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*/ \
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case GTK_TYPE_SIGNAL: \
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GTK_VALUE_SIGNAL (*arg).f = va_arg (var_args, GtkSignalFunc); \
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GTK_VALUE_SIGNAL (*arg).d = va_arg (var_args, gpointer); \
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break; \
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case GTK_TYPE_ARGS: \
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GTK_VALUE_ARGS (*arg).n_args = va_arg (var_args, gint); \
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GTK_VALUE_ARGS (*arg).args = va_arg (var_args, GtkArg*); \
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break; \
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case GTK_TYPE_FOREIGN: \
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GTK_VALUE_FOREIGN (*arg).data = va_arg (var_args, gpointer); \
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GTK_VALUE_FOREIGN (*arg).notify = va_arg (var_args, GtkDestroyNotify); \
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break; \
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case GTK_TYPE_CALLBACK: \
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GTK_VALUE_CALLBACK (*arg).marshal = va_arg (var_args, GtkCallbackMarshal); \
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GTK_VALUE_CALLBACK (*arg).data = va_arg (var_args, gpointer); \
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GTK_VALUE_CALLBACK (*arg).notify = va_arg (var_args, GtkDestroyNotify); \
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break; \
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case GTK_TYPE_C_CALLBACK: \
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GTK_VALUE_C_CALLBACK (*arg).func = va_arg (var_args, GtkFunction); \
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GTK_VALUE_C_CALLBACK (*arg).func_data = va_arg (var_args, gpointer); \
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break; \
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\
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/* we do some extra sanity checking when collecting objects, \
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* i.e. if the object pointer is not NULL, we check whether we \
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* actually got an object pointer within the desired class branch. \
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*/ \
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case GTK_TYPE_OBJECT: \
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GTK_VALUE_OBJECT (*arg) = va_arg (var_args, GtkObject*); \
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if (GTK_VALUE_OBJECT (*arg) != NULL) \
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{ \
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register GtkObject *object = GTK_VALUE_OBJECT (*arg); \
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\
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if (object->klass == NULL) \
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error_msg = g_strconcat ("invalid unclassed object pointer for argument type `", \
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gtk_type_name (arg->type), \
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"'", \
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NULL); \
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else if (!gtk_type_is_a (GTK_OBJECT_TYPE (object), arg->type)) \
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error_msg = g_strconcat ("invalid object `", \
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gtk_type_name (GTK_OBJECT_TYPE (object)), \
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"' for argument type `", \
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gtk_type_name (arg->type), \
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"'", \
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NULL); \
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} \
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break; \
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\
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default: \
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error_msg = g_strconcat ("unsupported argument type `", \
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gtk_type_name (arg->type), \
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"'", \
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NULL); \
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break; \
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} \
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\
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_error = error_msg; /* return error_msg; */ \
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} G_STMT_END
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