mirror of
https://github.com/moses-smt/mosesdecoder.git
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152 lines
4.2 KiB
C++
152 lines
4.2 KiB
C++
/***********************************************************************
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Moses - factored phrase-based language decoder
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Copyright (C) 2011- University of Edinburgh
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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***********************************************************************/
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#include <iostream>
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#include <sstream>
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#include <boost/functional/hash.hpp>
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#include "util/file_piece.hh"
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#include "util/tokenize_piece.hh"
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#include "FeatureArray.h"
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#include "FeatureDataIterator.h"
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using namespace std;
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using namespace util;
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namespace MosesTuning
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{
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int ParseInt(const StringPiece& str )
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{
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char* errIndex;
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//could wrap?
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int value = static_cast<int>(strtol(str.data(), &errIndex,10));
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if (errIndex == str.data()) {
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throw util::ParseNumberException(str);
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}
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return value;
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}
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float ParseFloat(const StringPiece& str)
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{
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char* errIndex;
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float value = static_cast<float>(strtod(str.data(), &errIndex));
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if (errIndex == str.data()) {
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throw util::ParseNumberException(str);
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}
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return value;
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}
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bool operator==(FeatureDataItem const& item1, FeatureDataItem const& item2)
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{
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return item1.dense==item1.dense && item1.sparse==item1.sparse;
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}
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size_t hash_value(FeatureDataItem const& item)
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{
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size_t seed = 0;
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boost::hash_combine(seed,item.dense);
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boost::hash_combine(seed,item.sparse);
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return seed;
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}
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FeatureDataIterator::FeatureDataIterator() {}
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FeatureDataIterator::FeatureDataIterator(const string& filename)
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{
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m_in.reset(new FilePiece(filename.c_str()));
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readNext();
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}
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FeatureDataIterator::~FeatureDataIterator() {}
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void FeatureDataIterator::readNext()
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{
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m_next.clear();
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try {
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StringPiece marker = m_in->ReadDelimited();
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if (marker != StringPiece(FEATURES_TXT_BEGIN)) {
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throw FileFormatException(m_in->FileName(), marker.as_string());
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}
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// size_t sentenceId = m_in->ReadULong();
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size_t count = m_in->ReadULong();
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size_t length = m_in->ReadULong();
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m_in->ReadLine(); //discard rest of line
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for (size_t i = 0; i < count; ++i) {
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StringPiece line = m_in->ReadLine();
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m_next.push_back(FeatureDataItem());
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for (TokenIter<AnyCharacter, true> token(line, AnyCharacter(" \t")); token; ++token) {
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TokenIter<AnyCharacterLast,false> value(*token,AnyCharacterLast("="));
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if (!value) throw FileFormatException(m_in->FileName(), line.as_string());
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StringPiece first = *value;
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++value;
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if (!value) {
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//regular feature
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float floatValue = ParseFloat(first);
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m_next.back().dense.push_back(floatValue);
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} else {
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//sparse feature
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StringPiece second = *value;
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float floatValue = ParseFloat(second);
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m_next.back().sparse.set(first.as_string(),floatValue);
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}
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}
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if (length != m_next.back().dense.size()) {
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throw FileFormatException(m_in->FileName(), line.as_string());
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}
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}
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StringPiece line = m_in->ReadLine();
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if (line != StringPiece(FEATURES_TXT_END)) {
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throw FileFormatException(m_in->FileName(), line.as_string());
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}
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} catch (EndOfFileException &e) {
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m_in.reset();
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}
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}
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void FeatureDataIterator::increment()
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{
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readNext();
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}
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bool FeatureDataIterator::equal(const FeatureDataIterator& rhs) const
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{
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if (!m_in && !rhs.m_in) {
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return true;
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} else if (!m_in) {
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return false;
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} else if (!rhs.m_in) {
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return false;
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} else {
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return m_in->FileName() == rhs.m_in->FileName() &&
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m_in->Offset() == rhs.m_in->Offset();
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}
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}
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const vector<FeatureDataItem>& FeatureDataIterator::dereference() const
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{
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return m_next;
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}
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}
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