[14] | 1 | /**CFile*********************************************************************** |
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| 2 | |
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| 3 | FileName [ tblSweep.c ] |
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| 4 | |
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| 5 | PackageName [ tbl ] |
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| 6 | |
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| 7 | Synopsis [Functions to support network sweeping.] |
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| 8 | |
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| 9 | SeeAlso [ tbl.h, tblEntryUtil.c ] |
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| 10 | |
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| 11 | Author [ Gitanjali M. Swamy ] |
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| 12 | |
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| 13 | Copyright [Copyright (c) 1994-1996 The Regents of the Univ. of California. |
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| 14 | All rights reserved. |
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| 15 | |
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| 16 | Permission is hereby granted, without written agreement and without license |
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| 17 | or royalty fees, to use, copy, modify, and distribute this software and its |
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| 18 | documentation for any purpose, provided that the above copyright notice and |
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| 19 | the following two paragraphs appear in all copies of this software. |
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| 20 | |
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| 21 | IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR |
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| 22 | DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT |
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| 23 | OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF |
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| 24 | CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 25 | |
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| 26 | THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, |
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| 27 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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| 28 | FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN |
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| 29 | "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO PROVIDE |
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| 30 | MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.] |
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| 31 | |
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| 32 | ******************************************************************************/ |
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| 33 | #include "tblInt.h" |
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| 34 | |
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| 35 | static char rcsid[] UNUSED = "$Id: tblSweep.c,v 1.12 2009/04/11 18:26:45 fabio Exp $"; |
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| 36 | |
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| 37 | /**AutomaticStart*************************************************************/ |
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| 38 | |
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| 39 | /*---------------------------------------------------------------------------*/ |
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| 40 | /* Static function prototypes */ |
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| 41 | /*---------------------------------------------------------------------------*/ |
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| 42 | |
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| 43 | static void SetAdjustedEntry(Tbl_Table_t *table, Tbl_Entry_t *entry, int index, int rownum, int colnum, boolean flag); |
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| 44 | static void SetEntry(Tbl_Table_t *newTable, Tbl_Entry_t *entry1, Tbl_Entry_t *entry2, int rownum, int colnum, int index, boolean flag); |
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| 45 | |
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| 46 | /**AutomaticEnd***************************************************************/ |
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| 47 | |
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| 48 | |
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| 49 | /*---------------------------------------------------------------------------*/ |
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| 50 | /* Definition of exported functions */ |
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| 51 | /*---------------------------------------------------------------------------*/ |
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| 52 | /**Function******************************************************************** |
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| 53 | |
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| 54 | Synopsis [return the result of collapsing table2 into table1] |
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| 55 | |
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| 56 | Description [Given two Tbl_Table_t table1 and table2, this function |
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| 57 | will collapse table2 into the table1. It will remove |
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| 58 | the column corresponding to the var associated with the |
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| 59 | first table. Currently, the second table must a |
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| 60 | constant table. This function checks every row to |
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| 61 | confirm that the entry corresponding to the variable of |
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| 62 | table2 does indeed take the constant value. If this |
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| 63 | condition is satisfied it copies the entire row (minus |
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| 64 | the column corresponding to the constant variable) into |
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| 65 | a new resultant table. This condition can be easily |
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| 66 | checked if the corresponding entry is of type |
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| 67 | Tbl_EntryNormal_c, using |
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| 68 | Tbl_EntryTestIntersectEntry. Otherwise its an involved |
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| 69 | process that entails tracing the entire sequence of |
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| 70 | equal entries until we encounter a Tbl_EntryNormal_c |
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| 71 | entry.] |
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| 72 | |
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| 73 | SideEffects [required] |
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| 74 | |
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| 75 | SeeAlso [optional] |
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| 76 | |
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| 77 | ******************************************************************************/ |
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| 78 | Tbl_Table_t* |
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| 79 | Tbl_TableCollapse(Tbl_Table_t* table1, Tbl_Table_t* table2,int index) |
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| 80 | { |
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| 81 | int rownum, realRowNum, colnum,eqcolnum,count,check; |
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| 82 | Var_Variable_t *var; |
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| 83 | Tbl_Table_t *newTable; |
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| 84 | Tbl_Entry_t *entry1, *entry2; |
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| 85 | Tbl_Entry_t *testEntry; |
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| 86 | |
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| 87 | if (Tbl_TableReadNumOutputs(table2)==1){ |
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| 88 | newTable = Tbl_TableAlloc(); |
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| 89 | |
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| 90 | if (Tbl_TableReadNumRows(table2) !=0) { |
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| 91 | entry2 = Tbl_TableReadEntry(table2,0,0,1); |
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| 92 | } |
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| 93 | else { |
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| 94 | entry2 = Tbl_TableDefaultReadEntry(table2,0); |
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| 95 | } |
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| 96 | /* add every input column except collapsing input */ |
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| 97 | for(colnum=0;colnum < Tbl_TableReadNumInputs(table1); colnum++) { |
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| 98 | if (colnum != index) { |
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| 99 | var = Tbl_TableReadIndexVar(table1,colnum,0); |
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| 100 | Tbl_TableAddColumn(newTable,var,0); |
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| 101 | } |
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| 102 | } |
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| 103 | for(colnum=0;colnum < Tbl_TableReadNumOutputs(table1); colnum++) { |
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| 104 | var = Tbl_TableReadIndexVar(table1,colnum,1); |
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| 105 | Tbl_TableAddColumn(newTable,var,1); |
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| 106 | } |
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| 107 | /* (void) Tbl_TableAddRow(newTable); */ |
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| 108 | |
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| 109 | |
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| 110 | realRowNum =0; |
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| 111 | eqcolnum = index; |
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| 112 | |
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| 113 | /* row by row, check if var has given constant value */ |
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| 114 | for(rownum=0; rownum< Tbl_TableReadNumRows(table1); rownum++) { |
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| 115 | testEntry = Tbl_TableReadEntry(table1,rownum,index,0); |
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| 116 | assert(entry2->type == Tbl_EntryNormal_c); |
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| 117 | |
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| 118 | /* input column by column */ |
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| 119 | if (testEntry->type == Tbl_EntryNormal_c){ |
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| 120 | if (Tbl_EntryTestIntersectEntry(testEntry,entry2)){ |
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| 121 | (void) Tbl_TableAddRow(newTable); |
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| 122 | |
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| 123 | for(colnum=0;colnum < Tbl_TableReadNumInputs(table1); colnum++) { |
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| 124 | entry1= Tbl_TableReadEntry(table1,rownum,colnum,0); |
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| 125 | SetEntry(newTable,entry1,entry2,realRowNum,colnum,index,0); |
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| 126 | } |
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| 127 | |
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| 128 | /* do outputs */ |
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| 129 | for(colnum=0;colnum < Tbl_TableReadNumOutputs(table1); colnum++) { |
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| 130 | entry1= Tbl_TableReadEntry(table1,rownum,colnum,1); |
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| 131 | SetEntry(newTable,entry1,entry2,realRowNum,colnum,index,1); |
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| 132 | } |
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| 133 | realRowNum++; |
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| 134 | } |
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| 135 | } |
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| 136 | else if (testEntry->type == Tbl_EntryEqual_c){ |
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| 137 | count = 0; |
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| 138 | check = 0; |
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| 139 | while(count<= Tbl_TableReadNumInputs(table1)){ |
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| 140 | |
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| 141 | /* Find out the column the entry equal to |
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| 142 | * and set that column entry to constant value if |
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| 143 | * its is of type Equal. This gets propagated by the while count |
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| 144 | * loop until you find a non-equal entry, and then it checks |
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| 145 | * for an intersection. If no intersection, then it |
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| 146 | * nullifies the row. Alas, there was no easier way */ |
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| 147 | if (testEntry->type == Tbl_EntryNormal_c){ |
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| 148 | if (Tbl_EntryTestIntersectEntry(testEntry,entry2)){ |
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| 149 | check = 1; |
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| 150 | } |
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| 151 | count = Tbl_TableReadNumInputs(table1)+1; |
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| 152 | } |
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| 153 | else { |
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| 154 | eqcolnum = Tbl_EntryReadVarIndex(testEntry); |
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| 155 | testEntry = Tbl_TableReadEntry(table1,rownum,eqcolnum,0); |
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| 156 | } |
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| 157 | if (count == Tbl_TableReadNumInputs(table1)){ |
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| 158 | check = 1; |
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| 159 | } |
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| 160 | count ++; |
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| 161 | } |
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| 162 | |
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| 163 | if (check == 1) { |
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| 164 | (void) Tbl_TableAddRow(newTable); |
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| 165 | count = 0; |
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| 166 | eqcolnum = index; |
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| 167 | testEntry = Tbl_TableReadEntry(table1,rownum,index,0); |
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| 168 | while(count<= Tbl_TableReadNumInputs(table1)){ |
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| 169 | if (testEntry->type == Tbl_EntryNormal_c){ |
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| 170 | SetEntry(newTable,entry2,entry2,realRowNum,eqcolnum,index,0); |
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| 171 | count = Tbl_TableReadNumInputs(table1)+1 ; |
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| 172 | } |
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| 173 | else { |
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| 174 | eqcolnum = Tbl_EntryReadVarIndex(testEntry); |
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| 175 | testEntry = Tbl_TableReadEntry(table1,rownum,eqcolnum,0); |
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| 176 | count ++; |
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| 177 | } |
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| 178 | } |
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| 179 | /* end of while */ |
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| 180 | /* fill in zero entries */ |
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| 181 | for(colnum=0;colnum < Tbl_TableReadNumInputs(table1); colnum++) { |
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| 182 | entry1= Tbl_TableReadEntry(table1,rownum,colnum,0); |
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| 183 | SetAdjustedEntry(newTable,Tbl_EntryDup(entry1),index,rownum,colnum,0); |
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| 184 | } |
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| 185 | /* do outputs */ |
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| 186 | for(colnum=0;colnum < Tbl_TableReadNumOutputs(table1); colnum++) { |
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| 187 | entry1= Tbl_TableReadEntry(table1,rownum,colnum,1); |
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| 188 | SetEntry(newTable,entry1,entry2,realRowNum,colnum,index,1); |
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| 189 | |
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| 190 | } |
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| 191 | } |
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| 192 | realRowNum++; |
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| 193 | } |
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| 194 | } |
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| 195 | Tbl_TableForEachDefaultEntry(table1,entry1,colnum) { |
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| 196 | entry2 = NIL(Tbl_Entry_t); |
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| 197 | |
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| 198 | if (entry1 != NIL(Tbl_Entry_t)) { |
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| 199 | if (entry1->type != Tbl_EntryEqual_c) { |
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| 200 | entry2 = Tbl_EntryDup(entry1); |
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| 201 | } |
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| 202 | else{ |
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| 203 | eqcolnum = Tbl_EntryReadVarIndex(entry1); |
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| 204 | if ( eqcolnum < index) { |
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| 205 | entry2 = Tbl_EntryDup(entry1); |
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| 206 | } |
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| 207 | else { |
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| 208 | if ( eqcolnum > index) { |
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| 209 | entry2 = Tbl_EntryDup(entry1); |
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| 210 | Tbl_EntrySetEqual(entry2, eqcolnum -1); |
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| 211 | } |
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| 212 | else { |
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| 213 | entry2 = Tbl_EntryDup(Tbl_TableReadEntry(table2,0,0,1)); |
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| 214 | } |
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| 215 | } |
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| 216 | } |
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| 217 | } |
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| 218 | (void) Tbl_TableDefaultSetEntry(newTable,entry2,colnum); |
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| 219 | } |
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| 220 | return newTable; |
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| 221 | } |
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| 222 | else { |
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| 223 | fail("The table is not constant\n"); |
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| 224 | return NIL(Tbl_Table_t); /* not reached */ |
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| 225 | } |
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| 226 | } |
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| 227 | |
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| 228 | |
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| 229 | /**Function******************************************************************** |
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| 230 | |
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| 231 | Synopsis [Inverts a binary input column in a table.] |
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| 232 | |
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| 233 | Description [Inverts a binary input column in a table. It has no |
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| 234 | effect if the variable associated to the given index is not binary |
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| 235 | or is symbolic. In some uncommon cases that are tricky to handle, |
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| 236 | it goves up ad returns a NULL pointer. Otherwise it returns a |
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| 237 | modified table.] |
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| 238 | |
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| 239 | SideEffects [none] |
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| 240 | |
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| 241 | SeeAlso [Tbl_TableIsInverter] |
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| 242 | |
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| 243 | ******************************************************************************/ |
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| 244 | Tbl_Table_t * |
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| 245 | Tbl_TableInvertBinaryInputColumn( |
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| 246 | Tbl_Table_t *table, |
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| 247 | int index |
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| 248 | ) |
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| 249 | { |
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| 250 | int rowNum, colNum; |
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| 251 | Tbl_Entry_t *entry; |
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| 252 | Tbl_Table_t *newTable; |
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| 253 | Var_Variable_t *var; |
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| 254 | |
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| 255 | var = Tbl_TableReadIndexVar(table, index, 0); |
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| 256 | if (Var_VariableReadNumValues(var) != 2 || |
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| 257 | Var_VariableTestIsSymbolic(var)) return NIL(Tbl_Table_t); |
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| 258 | |
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| 259 | /* Check default entries. We give up if any variable points to the column |
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| 260 | * to be complemented, because it's a rare case and it does not seem worth |
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| 261 | * the effort. |
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| 262 | */ |
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| 263 | Tbl_TableForEachDefaultEntry(table, entry, colNum) { |
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| 264 | if (entry != NIL(Tbl_Entry_t) && Tbl_EntryIsEqual(entry)) { |
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| 265 | int eqColNum = Tbl_EntryReadVarIndex(entry); |
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| 266 | if (eqColNum == index) { |
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| 267 | return NIL(Tbl_Table_t); |
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| 268 | } |
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| 269 | } |
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| 270 | } |
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| 271 | |
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| 272 | newTable = Tbl_TableHardDup(table); |
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| 273 | |
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| 274 | Tbl_TableForEachInputVar(table, colNum, var) { |
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| 275 | Tbl_TableSetVar(newTable, colNum, var, 0); |
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| 276 | } |
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| 277 | |
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| 278 | Tbl_TableForEachOutputVar(table, colNum, var) { |
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| 279 | Tbl_TableSetVar(newTable, colNum, var, 1); |
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| 280 | } |
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| 281 | |
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| 282 | /* Get rid of equal entries in the output part that point to the |
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| 283 | * column to be negated. We do not currently deal with equal |
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| 284 | * entries in the input part. If we find one, we give up. |
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| 285 | */ |
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| 286 | Tbl_TableForEachOutputEntry(newTable, rowNum, colNum, entry) { |
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| 287 | if (Tbl_EntryIsEqual(entry)) { |
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| 288 | int eqColNum = Tbl_EntryReadVarIndex(entry); |
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| 289 | if (eqColNum == index) { |
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| 290 | Tbl_Entry_t *eqEntry = Tbl_TableReadEntry(newTable, rowNum, index, 0); |
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| 291 | if (Tbl_EntryIsEqual(eqEntry) || |
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| 292 | Tbl_EntryReadNumValues(eqEntry) == 0) { |
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| 293 | /* Tricky case: we give up. */ |
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| 294 | Tbl_TableFree(newTable); |
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| 295 | return NIL(Tbl_Table_t); |
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| 296 | } else if (Tbl_EntryReadNumValues(eqEntry) == 1) { |
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| 297 | /* Downgrade the equality to a constant value. */ |
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| 298 | Tbl_Entry_t *entry2 = Tbl_EntryDup(eqEntry); |
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| 299 | Tbl_TableSetEntry(newTable, entry2, rowNum, colNum, 1); |
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| 300 | } else { |
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| 301 | int i, j; |
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| 302 | Tbl_Entry_t *entry2; |
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| 303 | i = Tbl_TableAddRow(newTable); |
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| 304 | Tbl_RowForEachInputEntry(newTable, rowNum, entry2, j) { |
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| 305 | if (j == index) { |
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| 306 | Tbl_Entry_t *entry3 = Tbl_EntryAlloc(Tbl_EntryNormal_c); |
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| 307 | Tbl_Entry_t *entry4 = Tbl_EntryAlloc(Tbl_EntryNormal_c); |
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| 308 | Tbl_EntrySetValue(entry3, 0, 0); |
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| 309 | Tbl_EntrySetValue(entry4, 1, 1); |
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| 310 | Tbl_TableSetEntry(newTable, entry3, rowNum, j, 0); |
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| 311 | Tbl_TableSetEntry(newTable, entry4, i, j, 0); |
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| 312 | } else { |
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| 313 | Tbl_TableSetEntry(newTable, Tbl_EntryDup(entry2), i, j, 0); |
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| 314 | } |
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| 315 | } |
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| 316 | Tbl_RowForEachOutputEntry(newTable, rowNum, entry2, j) { |
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| 317 | if (Tbl_EntryIsEqual(entry2) && |
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| 318 | Tbl_EntryReadVarIndex(entry) == index) { |
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| 319 | Tbl_Entry_t *entry3 = Tbl_EntryAlloc(Tbl_EntryNormal_c); |
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| 320 | Tbl_Entry_t *entry4 = Tbl_EntryAlloc(Tbl_EntryNormal_c); |
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| 321 | Tbl_EntrySetValue(entry3, 0, 0); |
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| 322 | Tbl_EntrySetValue(entry4, 1, 1); |
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| 323 | Tbl_TableSetEntry(newTable, entry3, rowNum, j, 1); |
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| 324 | Tbl_TableSetEntry(newTable, entry4, i, j, 1); |
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| 325 | } else { |
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| 326 | Tbl_TableSetEntry(newTable, Tbl_EntryDup(entry2), i, j, 1); |
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| 327 | } |
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| 328 | } |
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| 329 | continue; |
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| 330 | } |
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| 331 | } |
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| 332 | } |
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| 333 | } |
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| 334 | |
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| 335 | Tbl_TableForEachInputEntry(newTable, rowNum, colNum, entry) { |
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| 336 | if (Tbl_EntryIsEqual(entry)) { |
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| 337 | if (colNum == index) { |
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| 338 | Tbl_TableFree(newTable); |
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| 339 | return NIL(Tbl_Table_t); |
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| 340 | } else { |
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| 341 | int eqColNum = Tbl_EntryReadVarIndex(entry); |
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| 342 | if (eqColNum == index) { |
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| 343 | Tbl_TableFree(newTable); |
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| 344 | return NIL(Tbl_Table_t); |
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| 345 | } |
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| 346 | } |
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| 347 | } else if (colNum == index) { |
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| 348 | if (Tbl_EntryReadNumValues(entry) == 1) { |
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| 349 | Tbl_EntryComplement(entry, 0, 1); |
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| 350 | } |
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| 351 | } |
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| 352 | } |
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| 353 | |
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| 354 | return newTable; |
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| 355 | |
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| 356 | } /* Tbl_TableInvertBinaryInputColumn */ |
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| 357 | |
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| 358 | |
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| 359 | /*---------------------------------------------------------------------------*/ |
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| 360 | /* Definition of internal functions */ |
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| 361 | /*---------------------------------------------------------------------------*/ |
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| 362 | |
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| 363 | /**Function******************************************************************** |
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| 364 | |
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| 365 | Synopsis [Remove last row from table] |
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| 366 | |
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| 367 | Description [optional] |
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| 368 | |
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| 369 | SideEffects [required] |
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| 370 | |
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| 371 | SeeAlso [optional] |
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| 372 | |
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| 373 | ******************************************************************************/ |
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| 374 | boolean |
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| 375 | TblTableDeleteLastRow( |
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| 376 | Tbl_Table_t* table) |
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| 377 | { |
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| 378 | array_t *dataArray; |
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| 379 | Tbl_Row_t *row; |
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| 380 | int rowNum; |
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| 381 | |
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| 382 | dataArray = array_dup(TblTableReadData(table)); |
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| 383 | array_free(TblTableReadData(table)); |
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| 384 | TblTableReadData(table)= array_alloc(Tbl_Row_t*,0); |
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| 385 | for(rowNum=0; rowNum < (array_n(dataArray)-1); rowNum++) { |
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| 386 | row = array_fetch(Tbl_Row_t*,dataArray,rowNum); |
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| 387 | array_insert_last(Tbl_Row_t*,TblTableReadData(table),row); |
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| 388 | } |
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| 389 | return TRUE; |
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| 390 | } |
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| 391 | |
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| 392 | /*---------------------------------------------------------------------------*/ |
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| 393 | /* Definition of static functions */ |
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| 394 | /*---------------------------------------------------------------------------*/ |
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| 395 | |
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| 396 | |
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| 397 | /**Function******************************************************************** |
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| 398 | |
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| 399 | Synopsis [Set entry correctly] |
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| 400 | |
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| 401 | Description [optional] |
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| 402 | |
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| 403 | SideEffects [required] |
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| 404 | |
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| 405 | SeeAlso [optional] |
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| 406 | |
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| 407 | |
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| 408 | ******************************************************************************/ |
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| 409 | static void SetAdjustedEntry( |
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| 410 | Tbl_Table_t *table, |
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| 411 | Tbl_Entry_t *entry, |
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| 412 | int index, |
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| 413 | int rownum, |
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| 414 | int colnum, |
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| 415 | boolean flag) |
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| 416 | { |
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| 417 | Tbl_Entry_t *newEntry; |
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| 418 | |
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| 419 | if (flag ==0) { |
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| 420 | if (colnum < index) { |
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| 421 | /* should free if necessary */ |
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| 422 | newEntry = Tbl_TableReadEntry(table,rownum,colnum,0); |
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| 423 | if (newEntry==NIL(Tbl_Entry_t)) { |
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| 424 | Tbl_TableSetEntry(table,entry,rownum,colnum,0); |
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| 425 | } |
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| 426 | else { |
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| 427 | Tbl_EntryFree(entry); |
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| 428 | } |
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| 429 | } |
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| 430 | else if (colnum > index) { |
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| 431 | /* should free if necessary */ |
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| 432 | newEntry = Tbl_TableReadEntry(table,rownum,colnum-1,0); |
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| 433 | if (newEntry==NIL(Tbl_Entry_t)) { |
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| 434 | Tbl_TableSetEntry(table,entry,rownum,colnum-1,0); |
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| 435 | } |
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| 436 | else { |
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| 437 | Tbl_EntryFree(entry); |
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| 438 | } |
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| 439 | } |
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| 440 | else { |
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| 441 | Tbl_EntryFree(entry); |
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| 442 | } |
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| 443 | } |
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| 444 | else { |
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| 445 | newEntry = Tbl_TableReadEntry(table,rownum,colnum,1); |
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| 446 | if (newEntry== NIL(Tbl_Entry_t)) { |
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| 447 | Tbl_TableSetEntry(table,entry,rownum,colnum,1); |
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| 448 | } |
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| 449 | else { |
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| 450 | Tbl_EntryFree(newEntry); |
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| 451 | Tbl_TableSetEntry(table,entry,rownum,colnum,1); |
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| 452 | |
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| 453 | } |
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| 454 | } |
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| 455 | } |
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| 456 | |
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| 457 | /**Function******************************************************************** |
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| 458 | |
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| 459 | Synopsis [Set entry correctly] |
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| 460 | |
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| 461 | Description [optional] |
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| 462 | |
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| 463 | SideEffects [required] |
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| 464 | |
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| 465 | SeeAlso [optional] |
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| 466 | |
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| 467 | |
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| 468 | ******************************************************************************/ |
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| 469 | static void SetEntry( |
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| 470 | Tbl_Table_t *newTable, |
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| 471 | Tbl_Entry_t *entry1, |
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| 472 | Tbl_Entry_t *entry2, |
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| 473 | int rownum, |
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| 474 | int colnum, |
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| 475 | int index, |
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| 476 | boolean flag) |
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| 477 | { |
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| 478 | int varcolnum; |
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| 479 | Tbl_Entry_t *newEntry; |
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| 480 | |
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| 481 | |
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| 482 | if (entry1->type == Tbl_EntryNormal_c) { |
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| 483 | SetAdjustedEntry(newTable,Tbl_EntryDup(entry1),index,rownum,colnum, flag); |
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| 484 | } |
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| 485 | else { |
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| 486 | /* its of type equal */ |
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| 487 | varcolnum = Tbl_EntryReadVarIndex(entry1); |
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| 488 | if (varcolnum < index) { |
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| 489 | SetAdjustedEntry(newTable,Tbl_EntryDup(entry1),index,rownum,colnum, flag); |
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| 490 | } |
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| 491 | else { |
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| 492 | if (varcolnum > index) { |
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| 493 | newEntry = Tbl_EntryDup(entry1); |
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| 494 | Tbl_EntrySetEqual(newEntry,varcolnum-1); |
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| 495 | SetAdjustedEntry(newTable,newEntry,index,rownum,colnum,flag); |
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| 496 | |
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| 497 | } |
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| 498 | else { |
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| 499 | SetAdjustedEntry(newTable,Tbl_EntryDup(entry2),index,rownum,colnum, flag); |
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| 500 | } |
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| 501 | } |
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| 502 | } |
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| 503 | } |
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