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/****************************************************************************** |
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* Top contributors (to current version): |
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* Morgan Deters, Tim King, Kshitij Bansal |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Definition of input and output languages. |
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*/ |
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#include "options/set_language.h" |
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#include <iosfwd> |
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#include <iomanip> |
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#include "options/base_options.h" |
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#include "options/language.h" |
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#include "options/options.h" |
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namespace cvc5 { |
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namespace language { |
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const int SetLanguage::s_iosIndex = std::ios_base::xalloc(); |
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SetLanguage::Scope::Scope(std::ostream& out, OutputLanguage language) |
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: d_out(out) |
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, d_oldLanguage(SetLanguage::getLanguage(out)) |
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{ |
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SetLanguage::setLanguage(out, language); |
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} |
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SetLanguage::Scope::~Scope(){ |
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SetLanguage::setLanguage(d_out, d_oldLanguage); |
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} |
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SetLanguage::SetLanguage(OutputLanguage l) |
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: d_language(l) |
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{} |
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void SetLanguage::applyLanguage(std::ostream& out) { |
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// (offset by one to detect whether default has been set yet) |
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out.iword(s_iosIndex) = int(d_language) + 1; |
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} |
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OutputLanguage SetLanguage::getLanguage(std::ostream& out) { |
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long& l = out.iword(s_iosIndex); |
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if(l == 0) { |
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// set the default language on this ostream |
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// (offset by one to detect whether default has been set yet) |
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if(not Options::isCurrentNull()) { |
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l = options::outputLanguage() + 1; |
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} |
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if(l <= 0 || l > language::output::LANG_MAX) { |
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// if called from outside the library, we may not have options |
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// available to us at this point (or perhaps the output language |
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// is not set in Options). Default to something reasonable, but |
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// don't set "l" since that would make it "sticky" for this |
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// stream. |
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return OutputLanguage(s_defaultOutputLanguage); |
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} |
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} |
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return OutputLanguage(l - 1); |
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} |
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void SetLanguage::setLanguage(std::ostream& out, OutputLanguage l) { |
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// (offset by one to detect whether default has been set yet) |
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out.iword(s_iosIndex) = int(l) + 1; |
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} |
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std::ostream& operator<<(std::ostream& out, SetLanguage l) { |
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l.applyLanguage(out); |
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return out; |
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} |
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} // namespace language |
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} // namespace cvc5 |