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/*
Ousía
Copyright (C) 2014, 2015 Benjamin Paaßen, Andreas Stöckel
This program 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 3 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Callbacks.hpp"
#include "TokenRegistry.hpp"
namespace ousia {
namespace parser_stack {
TokenRegistry::~TokenRegistry()
{
for (const auto &tid: tokenIds) {
parser.unregisterToken(tid.first);
}
}
TokenId TokenRegistry::registerToken(const std::string &token)
{
// Check whether the given token is already registered
auto it = tokens.find(token);
if (it != tokens.end()) {
// Increment the reference count
size_t &refCount = it->second.second;
refCount++;
// Return the token id
return it->second.first;
}
// Register the token in the parser
TokenId id = parser.registerToken(token);
tokens[token] = std::pair<TokenId, size_t>(id, 1);
tokenIds[id] = token;
return id;
}
void TokenRegistry::unregisterToken(TokenId id)
{
// Lookup the token corresponding to the given token id
auto tokenIt = tokenIds.find(id);
if (tokenIt != tokenIds.end()) {
const std::string &token = tokenIt->second;
// Lookup the reference count for the corresponding token
auto idIt = tokens.find(token);
if (idIt != tokens.end()) {
// Decrement the reference count, abort if the refCount is larger
// than zero
size_t &refCount = idIt->second.second;
refCount--;
if (refCount > 0) {
return;
}
// Unregister the token from the parser
parser.unregisterToken(id);
// Unregister the token from the internal tokens map
tokens.erase(token);
}
// Unregister the token from the internal id map
tokenIds.erase(id);
}
}
}
}
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