1*d95b3509SRandall Stewart #ifndef __eval_expr_h__ 2*d95b3509SRandall Stewart #define __eval_expr_h__ 3*d95b3509SRandall Stewart /*- 4*d95b3509SRandall Stewart * Copyright (c) 2015 Netflix Inc. 5*d95b3509SRandall Stewart * All rights reserved. 6*d95b3509SRandall Stewart * 7*d95b3509SRandall Stewart * Redistribution and use in source and binary forms, with or without 8*d95b3509SRandall Stewart * modification, are permitted provided that the following conditions 9*d95b3509SRandall Stewart * are met: 10*d95b3509SRandall Stewart * 1. Redistributions of source code must retain the above copyright 11*d95b3509SRandall Stewart * notice, this list of conditions and the following disclaimer, 12*d95b3509SRandall Stewart * in this position and unchanged. 13*d95b3509SRandall Stewart * 2. Redistributions in binary form must reproduce the above copyright 14*d95b3509SRandall Stewart * notice, this list of conditions and the following disclaimer in the 15*d95b3509SRandall Stewart * documentation and/or other materials provided with the distribution. 16*d95b3509SRandall Stewart * 3. The name of the author may not be used to endorse or promote products 17*d95b3509SRandall Stewart * derived from this software without specific prior written permission 18*d95b3509SRandall Stewart * 19*d95b3509SRandall Stewart * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20*d95b3509SRandall Stewart * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21*d95b3509SRandall Stewart * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22*d95b3509SRandall Stewart * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23*d95b3509SRandall Stewart * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24*d95b3509SRandall Stewart * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25*d95b3509SRandall Stewart * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26*d95b3509SRandall Stewart * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27*d95b3509SRandall Stewart * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28*d95b3509SRandall Stewart * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29*d95b3509SRandall Stewart */ 30*d95b3509SRandall Stewart __FBSDID("$FreeBSD$"); 31*d95b3509SRandall Stewart 32*d95b3509SRandall Stewart enum exptype { 33*d95b3509SRandall Stewart TYPE_OP_PLUS, 34*d95b3509SRandall Stewart TYPE_OP_MINUS, 35*d95b3509SRandall Stewart TYPE_OP_MULT, 36*d95b3509SRandall Stewart TYPE_OP_DIVIDE, 37*d95b3509SRandall Stewart TYPE_PARN_OPEN, 38*d95b3509SRandall Stewart TYPE_PARN_CLOSE, 39*d95b3509SRandall Stewart TYPE_VALUE_CON, 40*d95b3509SRandall Stewart TYPE_VALUE_PMC 41*d95b3509SRandall Stewart }; 42*d95b3509SRandall Stewart 43*d95b3509SRandall Stewart #define STATE_UNSET 0 /* We have no setting yet in value */ 44*d95b3509SRandall Stewart #define STATE_FILLED 1 /* We have filled in value */ 45*d95b3509SRandall Stewart 46*d95b3509SRandall Stewart struct expression { 47*d95b3509SRandall Stewart struct expression *next; /* Next in expression. */ 48*d95b3509SRandall Stewart struct expression *prev; /* Prev in expression. */ 49*d95b3509SRandall Stewart double value; /* If there is a value to set */ 50*d95b3509SRandall Stewart enum exptype type; /* What is it */ 51*d95b3509SRandall Stewart uint8_t state; /* Current state if value type */ 52*d95b3509SRandall Stewart char name[252]; /* If a PMC whats the name, con value*/ 53*d95b3509SRandall Stewart }; 54*d95b3509SRandall Stewart 55*d95b3509SRandall Stewart struct expression *parse_expression(char *str); 56*d95b3509SRandall Stewart double run_expr(struct expression *exp, int initial_call, struct expression **lastone); 57*d95b3509SRandall Stewart void print_exp(struct expression *exp); 58*d95b3509SRandall Stewart #endif 59