/usr/include/ngram/hist-arc.h is in libngram-dev 1.3.2-3.
This file is owned by root:root, with mode 0o644.
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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 | // Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Copyright 2005-2016 Brian Roark and Google, Inc.
// An Fst arc type for histograms.
#ifndef NGRAM_HIST_ARC_H_
#define NGRAM_HIST_ARC_H_
#include <cctype>
#include <cmath>
#include <list>
#include <sstream>
#include <string>
#include <fst/types.h>
#include <fst/arc.h>
namespace ngram {
// Number of bins in histogram arc weights. Set to 2 more than the highest
// count that receives a Katz backoff estimate, to allow for bins representing
// the 0 count and counts higher than the cutoff.
const int kHistogramBins = 7;
} // namespace ngram
namespace fst {
// Histogram Arc is a cartesian product of Std Arcs.
struct HistogramArc : public PowerArc<StdArc, ngram::kHistogramBins> {
HistogramArc(Label i, Label o, Weight w, StateId s)
: ilabel(i), olabel(o), weight(w), nextstate(s) {}
HistogramArc() {}
static const string &Type() { // Arc type name
static const string type = "hist";
return type;
}
Label ilabel; // Transition input label
Label olabel; // Transition output label
Weight weight; // Transition weight
StateId nextstate; // Transition destination state
};
} // namespace fst
#endif // NGRAM_HIST_ARC_H_
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