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#ifndef __eval_expr_h__
#define __eval_expr_h__
/*-
* Copyright (c) 2015 Netflix Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
__FBSDID("$FreeBSD$");
enum exptype {
TYPE_OP_PLUS,
TYPE_OP_MINUS,
TYPE_OP_MULT,
TYPE_OP_DIVIDE,
TYPE_PARN_OPEN,
TYPE_PARN_CLOSE,
TYPE_VALUE_CON,
TYPE_VALUE_PMC
};
#define STATE_UNSET 0 /* We have no setting yet in value */
#define STATE_FILLED 1 /* We have filled in value */
struct expression {
struct expression *next; /* Next in expression. */
struct expression *prev; /* Prev in expression. */
double value; /* If there is a value to set */
enum exptype type; /* What is it */
uint8_t state; /* Current state if value type */
char name[252]; /* If a PMC whats the name, con value*/
};
struct expression *parse_expression(char *str);
double run_expr(struct expression *exp, int initial_call, struct expression **lastone);
void print_exp(struct expression *exp);
#endif
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