/* explist.h: a list of expressions
Copyright (c) 2002-2004 Philip Kendall
$Id$
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#ifndef BASIC_EXPLIST_H
#define BASIC_EXPLIST_H
#include <stdlib.h>
#include "numexp.h"
#include "strexp.h"
enum expression_type {
EXPRESSION_NUMEXP,
EXPRESSION_STREXP,
};
struct expression {
enum expression_type type;
union {
struct numexp *numexp;
struct strexp *strexp;
} types;
};
/* And a list of expressions */
struct explist {
GSList *items;
};
error_t expression_new_numexp( struct expression **expression,
struct numexp *numexp );
error_t expression_new_strexp( struct expression **expression,
struct strexp *strexp );
error_t explist_new( struct explist **list );
error_t explist_append_numexp( struct explist *list, struct numexp *numexp );
error_t explist_append_strexp( struct explist *list, struct strexp *strexp );
/* Put variable references into the expression list; used for creating
a list of variables as used by DEF FN */
error_t explist_append_forvar( struct explist *list, const char *name );
error_t explist_append_strvar( struct explist *list, const char *name );
/* Convert a list of numeric expressions into an array of integer values */
error_t explist_to_integer_array( struct program *program,
struct explist *list,
size_t **values, size_t *length );
error_t explist_free( struct explist *explist );
#endif /* #ifndef BASIC_EXPLIST_H */
