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| 1 | /* |
| 2 | * relop.h - Relational operators |
| 3 | * |
| 4 | * Copyright 2012 by Werner Almesberger |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | */ |
| 11 | |
| 12 | |
| 13 | #ifndef RELOP_H |
| 14 | #define RELOP_H |
| 15 | |
| 16 | #include <stdio.h> |
| 17 | |
| 18 | |
| 19 | enum relop_idx { |
| 20 | idx_lt = 0, |
| 21 | idx_le = 1, |
| 22 | idx_eq = 2, |
| 23 | idx_ge = 3, |
| 24 | idx_gt = 4, |
| 25 | idx_n = 5 |
| 26 | }; |
| 27 | |
| 28 | enum relop { |
| 29 | rel_lt = 1 << idx_lt, |
| 30 | rel_le = 1 << idx_le, |
| 31 | rel_eq = 1 << idx_eq, |
| 32 | rel_ge = 1 << idx_ge, |
| 33 | rel_gt = 1 << idx_gt, |
| 34 | }; |
| 35 | |
| 36 | |
| 37 | /* |
| 38 | * relop_unreachable checks whether, for all X: !(X opb A) -> !(X opa B) |
| 39 | */ |
| 40 | |
| 41 | int relop_unreachable(enum relop opa, enum relop opb, |
| 42 | const void *a, const void *b, |
| 43 | int (*cmp)(const void *a, enum relop op, const void *b, const void *user), |
| 44 | const void *user); |
| 45 | void dump_relop(FILE *file, enum relop op); |
| 46 | |
| 47 | #endif /* !RELOP_H */ |
| 48 |
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