/*
* Motif
*
* Copyright (c) 1987-2012, The Open Group. All rights reserved.
*
* These libraries and programs are free software; you can
* redistribute them and/or modify them 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.
*
* These libraries and programs are distributed in the hope that
* they 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 these librararies and programs; if not, write
* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
* Floor, Boston, MA 02110-1301 USA
*/
/*
* HISTORY
*/
#ifdef REV_INFO
#ifndef lint
static char rcsid[] = "$XConsortium: UilSarProc.c /main/12 1995/07/14 09:37:43 drk $"
#endif
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/*
* (c) Copyright 1989, 1990, DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS. */
/*
**++
** FACILITY:
**
** User Interface Language Compiler (UIL)
**
** ABSTRACT:
**
** This module contain the routines for processing procedures.
**
**--
**/
/*
**
** INCLUDE FILES
**
**/
#include "UilDefI.h"
/*
**
** DEFINE and MACRO DEFINITIONS
**
**/
/*
**
** EXTERNAL VARIABLE DECLARATIONS
**
**/
/*
**
** GLOBAL VARIABLE DECLARATIONS
**
**/
/*
**
** OWN VARIABLE DECLARATIONS
**
**/
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function create the procedure definition entry symbol
** node a procedure declaration.
**
** FORMAL PARAMETERS:
**
** id_frame ptr to token frame for the procedure name
** param_frame ptr to token frame or null frame holding the
** type of the argument
** class_frame ptr to frame whose b_flags holds private, etc. info
**
** IMPLICIT INPUTS:
**
** sym_az_current_section_entry the "current" section list
**
** IMPLICIT OUTPUTS:
**
** none
**
** FUNCTION VALUE:
**
** void
**
** SIDE EFFECTS:
**
** errors may be issued for previously defined name
**
**--
**/
void
sar_create_procedure(XmConst yystype *id_frame,
XmConst yystype *param_frame,
XmConst yystype *class_frame,
XmConst yystype *semi_frame)
{
sym_name_entry_type *name_entry;
sym_proc_def_entry_type *proc_def_entry;
sym_section_entry_type *section_entry;
sym_obj_entry_type *obj_entry;
/*
** Call standard routine to check name entry for id_frame.
** This routine handles font name, color names, etc used as ids
*/
name_entry = (sym_name_entry_type *) sem_dcl_name( id_frame );
if (name_entry == NULL)
return;
/*
** Allocate the procedure definition entry and fill it in
*/
proc_def_entry = (sym_proc_def_entry_type *)
sem_allocate_node (sym_k_proc_def_entry, sym_k_proc_def_entry_size);
proc_def_entry->b_widget_type = uil_max_object + 1;
proc_def_entry->obj_header.az_name = (sym_name_entry_type *) name_entry;
name_entry->az_object = (sym_entry_type *) proc_def_entry;
/*
** Parameter frame has 4 cases:
** 1) no argument checking desired
** syntax: PROCEDURE id
** 2) argument checking desired - no argument
** syntax: PROCEDURE id( )
** 3) argument checking desired - single argument
** syntax: PROCEDURE id( type )
** 4) argument checking desired - single typed widget argument
** syntax: PROCEDURE id( CLASS_NAME )
** These cases are distinguished as follows:
** 1) tag = null type = 0
** 2) tag = null type = sar_k_no_value
** 3) tag = token type = argument type
** 4) tag = object type = widget type
*/
proc_def_entry->v_arg_checking = TRUE;
switch (param_frame->b_tag)
{
case sar_k_null_frame:
if (param_frame->b_type == sym_k_no_value )
{
proc_def_entry->b_arg_count = 0;
proc_def_entry->b_arg_type = sym_k_no_value;
}
else
proc_def_entry->v_arg_checking = FALSE;
break;
case sar_k_token_frame:
proc_def_entry->b_arg_type = param_frame->b_type;
proc_def_entry->b_arg_count = 1;
break;
case sar_k_object_frame:
_assert((param_frame->b_type == sym_k_widget_entry),
"object frame not widget entry");
obj_entry =
(sym_obj_entry_type *)param_frame->value.az_symbol_entry;
proc_def_entry->b_arg_type = sym_k_widget_ref_value;
proc_def_entry->b_arg_count = 1;
proc_def_entry->b_widget_type = obj_entry->header.b_type;
break;
default:
_assert( FALSE, "param frame in error" );
}
/*
** Process the class clause
*/
switch (class_frame->b_flags)
{
case sym_m_exported:
sym_make_external_def( name_entry );
case sym_m_private:
case sym_m_imported:
break;
default:
_assert( FALSE, "class frame in error" );
}
proc_def_entry->obj_header.b_flags = class_frame->b_flags;
/*
** save the source file info for this procedure entry
*/
_sar_save_source_info (&proc_def_entry->header, id_frame, semi_frame );
sar_assoc_comment((sym_obj_entry_type *)proc_def_entry); /* preserve comments */
/*
** allocate a section entry to link the proc_def entry into the structure
*/
section_entry = (sym_section_entry_type *) sem_allocate_node
(sym_k_section_entry, sym_k_section_entry_size);
/*
** Link this entry off of the current section list
*/
section_entry->next = (sym_entry_type *) sym_az_current_section_entry->entries;
sym_az_current_section_entry->entries = (sym_entry_type *) section_entry;
section_entry->entries = (sym_entry_type *) proc_def_entry;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function processes a reference to a procedure.
**
** FORMAL PARAMETERS:
**
** id_frame ptr to token frame for the procedure name
** value_frame ptr to token frame or null frame holding the
** value of the argument to the procedure
** context value indicating how the procedure is being used
**
** IMPLICIT INPUTS:
**
** none
**
** IMPLICIT OUTPUTS:
**
** none
**
** FUNCTION VALUE:
**
** a procedure reference entry / NULL in case of an illegal reference
**
** SIDE EFFECTS:
**
** errors may be issued
**
**--
**/
sym_proc_ref_entry_type
*sem_reference_procedure( yystype *id_frame,
XmConst yystype *value_frame,
XmConst int context )
{
sym_value_entry_type *value_entry;
sym_proc_def_entry_type *proc_def_entry;
sym_proc_ref_entry_type *proc_ref_entry;
/*
** Call standard routine to check name entry for id_frame.
** This routine handles font name, color names, etc used as ids
*/
proc_def_entry =
(sym_proc_def_entry_type *)
sem_ref_name( id_frame, sym_k_proc_def_entry );
switch (value_frame->b_tag)
{
case sar_k_null_frame:
value_entry = NULL;
break;
case sar_k_value_frame:
if ((value_frame->b_flags & sym_m_forward_ref) != 0)
value_entry = NULL;
else
value_entry = (sym_value_entry_type *)
value_frame->value.az_symbol_entry;
break;
case sar_k_object_frame:
value_entry =
(sym_value_entry_type *) value_frame->value.az_symbol_entry;
break;
default:
_assert( FALSE, "actual arg in error" );
}
/*
** Allocate the procedure reference entry and fill it in
*/
proc_ref_entry = (sym_proc_ref_entry_type *)
sem_allocate_node (sym_k_proc_ref_entry, sym_k_proc_ref_entry_size);
if ((id_frame->b_flags & sym_m_forward_ref) != 0)
sym_make_value_forward_ref (id_frame,
(char*)&(proc_ref_entry->az_proc_def), sym_k_patch_list_add);
else
proc_ref_entry->az_proc_def = proc_def_entry;
if ((value_frame->b_flags & sym_m_forward_ref) != 0)
sym_make_value_forward_ref (value_frame,
(char*)&(proc_ref_entry->az_arg_value), sym_k_patch_add);
else
proc_ref_entry->az_arg_value = value_entry;
/*
** Apply context constraints
**
** If this is a procedure being used as a user object,
** it should not have any arguments. The arguments to such
** a procedure are always a parent widget id and an argument list.
** This constraint is currently inforced by the grammar.
**
** At this time the compiler permits all types of values for callback
** arguments. This may be limited shortly when we see if it is
** reasonable to pass fonts, colors, reasons, etc.
*/
return proc_ref_entry;
}
/*
**++
** FUNCTIONAL DESCRIPTION:
**
** This function checks to see if a object is defined with the name
** corresponding to the id given in the first parameter.
**
** FORMAL PARAMETERS:
**
** id_frame ptr to a token frame on the parse stack holding the name
** tag the type of construct needed
**
** IMPLICIT INPUTS:
**
** none
**
** IMPLICIT OUTPUTS:
**
** none
**
** FUNCTION VALUE:
**
** ptr to a symbol entry for construct or NULL
**
** SIDE EFFECTS:
**
** error message if the name is undefined or for a different construct
** forward_ref bit may be turned on in id_frame
**--
**/
sym_entry_type
*sem_ref_name(yystype *id_frame,
XmConst int tag)
{
sym_name_entry_type *name_entry;
sym_entry_type *symbol_entry;
_assert( id_frame->b_tag == sar_k_token_frame, "arg1 not id frame" );
/*
** The id frame may hold a name or the keyword for a font name, color
** name, reason name etc. If it is one of these special name, then
** we must see if the symbol table holds a name for the special type.
*/
if (id_frame->b_type != NAME)
{
name_entry =
sym_find_name
( id_frame->value.az_keyword_entry->b_length,
id_frame->value.az_keyword_entry->at_name );
if (name_entry == NULL)
{
diag_issue_diagnostic
( d_undefined,
_sar_source_position( id_frame ),
diag_tag_text( sym_k_proc_def_entry ),
id_frame->value.az_keyword_entry->at_name );
return NULL;
}
}
else
name_entry =
(sym_name_entry_type *) id_frame->value.az_symbol_entry;
/*
** If the name entry already has no object linked from it, we are
** referencing an undefined object.
*/
symbol_entry = name_entry->az_object;
if (symbol_entry == NULL )
{
id_frame->b_flags |= sym_m_forward_ref;
return NULL;
}
/*
** If the name entry has the wrong type of object, this is also
** an error.
*/
if (symbol_entry->header.b_tag != tag )
{
diag_issue_diagnostic
( d_ctx_req,
_sar_source_position( id_frame ),
diag_tag_text( tag ),
diag_tag_text( symbol_entry->header.b_tag ) );
return NULL;
}
return symbol_entry;
}