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/********************* */
/*! \file set_language.cpp
** \verbatim
** Top contributors (to current version):
** Morgan Deters, Tim King, Kshitij Bansal
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
** in the top-level source directory and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Definition of input and output languages
**
** Definition of input and output languages.
**/
#include "options/set_language.h"
#include <iosfwd>
#include <iomanip>
#include "options/base_options.h"
#include "options/language.h"
#include "options/options.h"
namespace CVC4 {
namespace language {
const int SetLanguage::s_iosIndex = std::ios_base::xalloc();
SetLanguage::Scope::Scope(std::ostream& out, OutputLanguage language)
: d_out(out)
, d_oldLanguage(SetLanguage::getLanguage(out))
{
SetLanguage::setLanguage(out, language);
}
SetLanguage::Scope::~Scope(){
SetLanguage::setLanguage(d_out, d_oldLanguage);
}
SetLanguage::SetLanguage(OutputLanguage l)
: d_language(l)
{}
void SetLanguage::applyLanguage(std::ostream& out) {
// (offset by one to detect whether default has been set yet)
out.iword(s_iosIndex) = int(d_language) + 1;
}
OutputLanguage SetLanguage::getLanguage(std::ostream& out) {
long& l = out.iword(s_iosIndex);
if(l == 0) {
// set the default language on this ostream
// (offset by one to detect whether default has been set yet)
if(not Options::isCurrentNull()) {
l = options::outputLanguage() + 1;
}
if(l <= 0 || l > language::output::LANG_MAX) {
// if called from outside the library, we may not have options
// available to us at this point (or perhaps the output language
// is not set in Options). Default to something reasonable, but
// don't set "l" since that would make it "sticky" for this
// stream.
return OutputLanguage(s_defaultOutputLanguage);
}
}
return OutputLanguage(l - 1);
}
void SetLanguage::setLanguage(std::ostream& out, OutputLanguage l) {
// (offset by one to detect whether default has been set yet)
out.iword(s_iosIndex) = int(l) + 1;
}
std::ostream& operator<<(std::ostream& out, SetLanguage l) {
l.applyLanguage(out);
return out;
}
}/* CVC4::language namespace */
}/* CVC4 namespace */
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