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//===-- qlogo/vars.cpp - Vars class implementation -------*- C++ -*-===//
//
// This file is part of QLogo.
//
// QLogo is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// QLogo is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with QLogo. If not, see <http://www.gnu.org/licenses/>.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file contains the implementation of the Vars class, which holds the
/// variables in the QLogo language.
///
//===----------------------------------------------------------------------===//
#include "vars.h"
#include "QDebug"
#include <QSet>
const QString tf = "*tf*";
Vars::Vars() { upScope(); }
void Vars::setDatumForName(DatumP &aDatum, const QString &name) {
for (auto &variables : levels) {
if (variables.contains(name)) {
variables[name] = aDatum;
return;
}
}
levels.last().insert(name, aDatum);
}
DatumP Vars::datumForName(const QString &name) {
for (auto &variables : levels) {
auto result = variables.find(name);
if (result != variables.end()) {
return *result;
}
}
return nothing;
}
void Vars::setVarAsLocal(const QString &name) {
levels.first().insert(name, nothing);
}
void Vars::setVarAsGlobal(const QString &name) {
levels.last().insert(name, nothing);
}
void Vars::upScope() {
QHash<QString, DatumP> a;
levels.push_front(a);
}
void Vars::downScope() { levels.pop_front(); }
int Vars::currentScope() { return levels.size(); }
bool Vars::doesExist(const QString &name) {
for (auto &variables : levels) {
if (variables.contains(name))
return true;
}
return false;
}
DatumP Vars::allVariables(showContents_t showWhat) {
List *retval = new List;
QSet<const QString> seenVars;
for (auto &levelIter : levels) {
for (auto &varname : levelIter.keys()) {
if (!seenVars.contains(varname)) {
seenVars.insert(varname);
if (shouldInclude(showWhat, varname))
retval->append(DatumP(new Word(varname)));
}
}
}
return DatumP(retval);
}
void Vars::eraseAll() {
for (auto &levelIter : levels) {
for (auto &varname : levelIter.keys()) {
if (!isBuried(varname))
levelIter.remove(varname);
}
}
}
void Vars::eraseVar(const QString &name) {
for (auto &variables : levels) {
if (variables.remove(name) > 0)
return;
}
}
void Vars::setTest(bool isTrue) {
DatumP t = new Word(isTrue ? 0 : 1);
levels.first().insert(tf, t);
}
bool Vars::isTested() { return datumForName(tf).isWord(); }
bool Vars::isTrue() {
DatumP retval = datumForName(tf);
if (retval.isWord() && (retval.wordValue()->numberValue() == 0))
return true;
return false;
}
bool Vars::isFalse() {
DatumP retval = datumForName(tf);
if (retval.isWord() && (retval.wordValue()->numberValue() == 1))
return true;
return false;
}
Scope::Scope(Vars *aVars) {
v = aVars;
v->upScope();
}
Scope::~Scope() { v->downScope(); }
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