[13] | 1 | #include "mdd.h" |
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| 2 | |
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| 3 | /* |
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| 4 | * MDD Package |
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| 5 | * |
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| 6 | * $Id: mdd_literal.c,v 1.10 2002/08/24 21:48:15 fabio Exp $ |
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| 7 | * |
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| 8 | * Author: Timothy Kam |
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| 9 | * |
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| 10 | * Copyright 1992 by the Regents of the University of California. |
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| 11 | * |
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| 12 | * All rights reserved. Permission to use, copy, modify and distribute |
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| 13 | * this software is hereby granted, provided that the above copyright |
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| 14 | * notice and this permission notice appear in all copies. This software |
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| 15 | * is made available as is, with no warranties. |
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| 16 | */ |
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| 17 | |
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| 18 | /* Returns \/_{i in values}(mddid == i) */ |
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| 19 | /* Algorithm used to be quadratic. Is linear now */ |
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| 20 | mdd_t * |
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| 21 | mdd_literal( |
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| 22 | mdd_manager *mgr, |
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| 23 | int mddid, |
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| 24 | array_t *values) |
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| 25 | { |
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| 26 | mvar_type mvar; |
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| 27 | mdd_t *one, *zero; |
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| 28 | array_t *allValues; /* Holds one in pos i iff value i is allowed */ |
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| 29 | int i; /* iterator */ |
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| 30 | int value; /* iterates over values */ |
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| 31 | mdd_t *result; |
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| 32 | |
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| 33 | mvar = mdd_get_var_by_id(mgr, mddid); |
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| 34 | one = mdd_one(mgr); |
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| 35 | zero = mdd_zero(mgr); |
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| 36 | allValues = array_alloc(mdd_t *, mvar.values); |
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| 37 | |
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| 38 | /* first set every value to zero */ |
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| 39 | for(i = 0; i < mvar.values; i++) |
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| 40 | array_insert(mdd_t *, allValues, i, zero); |
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| 41 | |
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| 42 | /* then set requested values to one */ |
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| 43 | arrayForEachItem(int, values, i, value) |
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| 44 | array_insert(mdd_t *, allValues, value, one); |
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| 45 | |
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| 46 | result = mdd_case(mgr, mddid, allValues); |
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| 47 | array_free(allValues); |
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| 48 | |
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| 49 | mdd_free(one); |
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| 50 | mdd_free(zero); |
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| 51 | |
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| 52 | return result; |
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| 53 | } |
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| 54 | |
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| 55 | |
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| 56 | /*---------------------------------------------------------------------------*/ |
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| 57 | /* Static function prototypes */ |
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| 58 | /*---------------------------------------------------------------------------*/ |
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| 59 | |
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| 60 | |
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