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Diffstat (limited to 'usr.sbin/pmcstudy/eval_expr.h')
| -rw-r--r-- | usr.sbin/pmcstudy/eval_expr.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/usr.sbin/pmcstudy/eval_expr.h b/usr.sbin/pmcstudy/eval_expr.h new file mode 100644 index 0000000..f095513 --- /dev/null +++ b/usr.sbin/pmcstudy/eval_expr.h @@ -0,0 +1,58 @@ +#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 |
