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#include <omega/pres_conj.h>
#include <omega/RelBody.h>
#include <omega/omega_i.h>
namespace omega {
//
// Copy column fr_col of problem fp
// to column to_col of problem tp.
// Displacement for constraints in tp are start_EQ and start_GEQ.
//
void copy_column(Problem *tp, int to_col,
Problem *fp, int fr_col,
int start_EQ, int start_GEQ) {
checkVars(to_col);
assert(start_EQ + fp->nEQs <= tp->allocEQs);
assert(start_GEQ + fp->nGEQs <= tp->allocGEQs);
int i;
for(i=0; i<fp->nEQs; i++) {
tp->EQs[i+start_EQ].coef[to_col] = fp->EQs[i].coef[fr_col];
}
for(i=0; i<fp->nGEQs; i++) {
tp->GEQs[i+start_GEQ].coef[to_col] = fp->GEQs[i].coef[fr_col];
}
}
//
// Zero column to_col of problem tp.
// Displacement for constraints in to_conj are start_EQ and start_GEQ.
// Number of constraints to zero are no_EQ and no_GEQ.
//
void zero_column(Problem *tp, int to_col,
int start_EQ, int start_GEQ,
int no_EQs, int no_GEQs) {
assert(start_EQ + no_EQs <= tp->allocEQs);
assert(start_GEQ + no_GEQs <= tp->allocGEQs);
int i;
for(i=0; i<no_EQs; i++) {
tp->EQs[i+start_EQ].coef[to_col] = 0;
}
for(i=0; i<no_GEQs; i++) {
tp->GEQs[i+start_GEQ].coef[to_col] = 0;
}
}
//
// return column for D in conjunct
//
int Conjunct::get_column(Variable_ID D) {
int col = find_column(D);
if (col == 0) // if it does not already have a column assigned
col = map_to_column(D);
assert(col > 0); // Not substituted
return col;
}
//
// Find column in conjunct.
//
int Conjunct::find_column(Variable_ID D) {
assert(D != 0);
int column = mappedVars.index(D);
// If it has been through the omega core (variablesInitialized),
// and it exists in the problem, check to see if it has been forwarded.
// This will likely only be the case if substitutions have been done;
// that won't arise in user code, only in print_with_subs and the
// Substitutions class.
if (problem->variablesInitialized && column > 0) {
assert(problem->forwardingAddress[column] != 0);
column = problem->forwardingAddress[column];
}
assert (column <= problem->nVars);
return column;
}
//
// Create new column in conjunct.
//
int Conjunct::map_to_column(Variable_ID D) {
assert(D != 0);
// This heavy-duty assertion says that if you are trying to use a global
// var's local representative in a relation, that you have first told the
// relation that you are using it here. PUFS requires that we know
// all the function symbols that might be used in a relation.
// If one wanted to be less strict, one could just tell the relation
// that the global variable was being used.
assert(D->kind() != Global_Var ||
(relation()->has_local(D->get_global_var(), D->function_of())
&& "Attempt to update global var without a local variable ID"));
cols_ordered = false; // extremely important
checkVars(problem->nVars+2);
int col = ++problem->nVars;
mappedVars.append(D);
problem->forwardingAddress[col] = col;
problem->var[col] = col;
zero_column(problem, col, 0, 0, problem->nEQs, problem->nGEQs);
return col;
}
} // namespace
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