File size: 4,274 Bytes
158b61b |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 |
/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2011- University of Edinburgh
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
***********************************************************************/
#include <iostream>
#include <sstream>
#include <boost/functional/hash.hpp>
#include "util/file_piece.hh"
#include "util/tokenize_piece.hh"
#include "FeatureArray.h"
#include "FeatureDataIterator.h"
using namespace std;
using namespace util;
namespace MosesTuning
{
int ParseInt(const StringPiece& str )
{
char* errIndex;
//could wrap?
int value = static_cast<int>(strtol(str.data(), &errIndex,10));
if (errIndex == str.data()) {
throw util::ParseNumberException(str);
}
return value;
}
float ParseFloat(const StringPiece& str)
{
char* errIndex;
float value = static_cast<float>(strtod(str.data(), &errIndex));
if (errIndex == str.data()) {
throw util::ParseNumberException(str);
}
return value;
}
bool operator==(FeatureDataItem const& item1, FeatureDataItem const& item2)
{
return item1.dense==item1.dense && item1.sparse==item1.sparse;
}
size_t hash_value(FeatureDataItem const& item)
{
size_t seed = 0;
boost::hash_combine(seed,item.dense);
boost::hash_combine(seed,item.sparse);
return seed;
}
FeatureDataIterator::FeatureDataIterator() {}
FeatureDataIterator::FeatureDataIterator(const string& filename)
{
m_in.reset(new FilePiece(filename.c_str()));
readNext();
}
FeatureDataIterator::~FeatureDataIterator() {}
void FeatureDataIterator::readNext()
{
m_next.clear();
try {
StringPiece marker = m_in->ReadDelimited();
if (marker != StringPiece(FEATURES_TXT_BEGIN)) {
throw FileFormatException(m_in->FileName(), marker.as_string());
}
// size_t sentenceId =
m_in->ReadULong();
size_t count = m_in->ReadULong();
size_t length = m_in->ReadULong();
m_in->ReadLine(); //discard rest of line
for (size_t i = 0; i < count; ++i) {
StringPiece line = m_in->ReadLine();
m_next.push_back(FeatureDataItem());
for (TokenIter<AnyCharacter, true> token(line, AnyCharacter(" \t")); token; ++token) {
TokenIter<AnyCharacterLast,false> value(*token,AnyCharacterLast("="));
if (!value) throw FileFormatException(m_in->FileName(), line.as_string());
StringPiece first = *value;
++value;
if (!value) {
//regular feature
float floatValue = ParseFloat(first);
m_next.back().dense.push_back(floatValue);
} else {
//sparse feature
StringPiece second = *value;
float floatValue = ParseFloat(second);
m_next.back().sparse.set(first.as_string(),floatValue);
}
}
if (length != m_next.back().dense.size()) {
throw FileFormatException(m_in->FileName(), line.as_string());
}
}
StringPiece line = m_in->ReadLine();
if (line != StringPiece(FEATURES_TXT_END)) {
throw FileFormatException(m_in->FileName(), line.as_string());
}
} catch (EndOfFileException &e) {
m_in.reset();
}
}
void FeatureDataIterator::increment()
{
readNext();
}
bool FeatureDataIterator::equal(const FeatureDataIterator& rhs) const
{
if (!m_in && !rhs.m_in) {
return true;
} else if (!m_in) {
return false;
} else if (!rhs.m_in) {
return false;
} else {
return m_in->FileName() == rhs.m_in->FileName() &&
m_in->Offset() == rhs.m_in->Offset();
}
}
const vector<FeatureDataItem>& FeatureDataIterator::dereference() const
{
return m_next;
}
}
|