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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