1d95b3509SRandall Stewart #ifndef __eval_expr_h__ 2d95b3509SRandall Stewart #define __eval_expr_h__ 3d95b3509SRandall Stewart /*- 4*52467047SWarner Losh * Copyright (c) 2015 Netflix, Inc. 5d95b3509SRandall Stewart * 6d95b3509SRandall Stewart * Redistribution and use in source and binary forms, with or without 7d95b3509SRandall Stewart * modification, are permitted provided that the following conditions 8d95b3509SRandall Stewart * are met: 9d95b3509SRandall Stewart * 1. Redistributions of source code must retain the above copyright 10d95b3509SRandall Stewart * notice, this list of conditions and the following disclaimer, 11d95b3509SRandall Stewart * in this position and unchanged. 12d95b3509SRandall Stewart * 2. Redistributions in binary form must reproduce the above copyright 13d95b3509SRandall Stewart * notice, this list of conditions and the following disclaimer in the 14d95b3509SRandall Stewart * documentation and/or other materials provided with the distribution. 15d95b3509SRandall Stewart * 3. The name of the author may not be used to endorse or promote products 16d95b3509SRandall Stewart * derived from this software without specific prior written permission 17d95b3509SRandall Stewart * 18d95b3509SRandall Stewart * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19d95b3509SRandall Stewart * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20d95b3509SRandall Stewart * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21d95b3509SRandall Stewart * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22d95b3509SRandall Stewart * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23d95b3509SRandall Stewart * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24d95b3509SRandall Stewart * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25d95b3509SRandall Stewart * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26d95b3509SRandall Stewart * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27d95b3509SRandall Stewart * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28d95b3509SRandall Stewart */ 29d95b3509SRandall Stewart enum exptype { 30d95b3509SRandall Stewart TYPE_OP_PLUS, 31d95b3509SRandall Stewart TYPE_OP_MINUS, 32d95b3509SRandall Stewart TYPE_OP_MULT, 33d95b3509SRandall Stewart TYPE_OP_DIVIDE, 34d95b3509SRandall Stewart TYPE_PARN_OPEN, 35d95b3509SRandall Stewart TYPE_PARN_CLOSE, 36d95b3509SRandall Stewart TYPE_VALUE_CON, 37d95b3509SRandall Stewart TYPE_VALUE_PMC 38d95b3509SRandall Stewart }; 39d95b3509SRandall Stewart 40d95b3509SRandall Stewart #define STATE_UNSET 0 /* We have no setting yet in value */ 41d95b3509SRandall Stewart #define STATE_FILLED 1 /* We have filled in value */ 42d95b3509SRandall Stewart 43d95b3509SRandall Stewart struct expression { 44d95b3509SRandall Stewart struct expression *next; /* Next in expression. */ 45d95b3509SRandall Stewart struct expression *prev; /* Prev in expression. */ 46d95b3509SRandall Stewart double value; /* If there is a value to set */ 47d95b3509SRandall Stewart enum exptype type; /* What is it */ 48d95b3509SRandall Stewart uint8_t state; /* Current state if value type */ 49d95b3509SRandall Stewart char name[252]; /* If a PMC whats the name, con value*/ 50d95b3509SRandall Stewart }; 51d95b3509SRandall Stewart 52d95b3509SRandall Stewart struct expression *parse_expression(char *str); 53d95b3509SRandall Stewart double run_expr(struct expression *exp, int initial_call, struct expression **lastone); 54d95b3509SRandall Stewart void print_exp(struct expression *exp); 55d95b3509SRandall Stewart #endif 56