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
|
/***********************************************************************
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 "util/tokenize_piece.hh"
#include "FeatureArray.h"
#include "FeatureDataIterator.h"
using namespace std;
using namespace util;
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;
}
FeatureDataIterator::FeatureDataIterator() {}
FeatureDataIterator::FeatureDataIterator(const string& filename) {
m_in.reset(new FilePiece(filename.c_str()));
readNext();
}
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;
}
|
