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https://git.code.sf.net/p/fuse-emulator/fuse
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108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
/* expression.c: A numeric expression
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Copyright (c) 2003 Philip Kendall
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$Id$
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Author contact information:
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E-mail: pak21-fuse@srcf.ucam.org
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Postal address: 15 Crescent Road, Wokingham, Berks, RG40 2DB, England
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*/
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#include <config.h>
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#include <stdlib.h>
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#include "debugger_internals.h"
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#include "ui/ui.h"
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typedef enum debugger_expression_type {
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DEBUGGER_EXPRESSION_TYPE_INTEGER,
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DEBUGGER_EXPRESSION_TYPE_REGISTER,
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} debugger_expression_type;
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struct debugger_expression {
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debugger_expression_type type;
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union {
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int integer;
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int reg;
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} types;
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};
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debugger_expression*
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debugger_expression_new_number( int number )
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{
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debugger_expression *exp;
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exp = malloc( sizeof( debugger_expression ) );
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if( !exp ) {
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ui_error( UI_ERROR_ERROR, "out of memory at %s:%d", __FILE__, __LINE__ );
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return NULL;
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}
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exp->type = DEBUGGER_EXPRESSION_TYPE_INTEGER;
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exp->types.integer = number;
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return exp;
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}
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debugger_expression*
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debugger_expression_new_register( int which )
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{
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debugger_expression *exp;
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exp = malloc( sizeof( debugger_expression ) );
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if( !exp ) {
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ui_error( UI_ERROR_ERROR, "out of memory at %s:%d", __FILE__, __LINE__ );
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return NULL;
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}
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exp->type = DEBUGGER_EXPRESSION_TYPE_REGISTER;
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exp->types.reg = which;
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return exp;
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}
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void
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debugger_expression_delete( debugger_expression *exp )
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{
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free( exp );
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}
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int
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debugger_expression_evaluate( debugger_expression *exp )
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{
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switch( exp->type ) {
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case DEBUGGER_EXPRESSION_TYPE_INTEGER:
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return exp->types.integer;
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case DEBUGGER_EXPRESSION_TYPE_REGISTER:
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return debugger_register_get( exp->types.reg );
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default:
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ui_error( UI_ERROR_ERROR, "unknown expression type %d", exp->type );
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return 0;
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}
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}
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