/usr/include/fst/script/prune.h is in libfst-dev 1.5.3+r3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | // See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
#ifndef FST_SCRIPT_PRUNE_H_
#define FST_SCRIPT_PRUNE_H_
#include <memory>
#include <vector>
#include <fst/arcfilter.h>
#include <fst/prune.h>
#include <fst/script/arg-packs.h>
#include <fst/script/fst-class.h>
#include <fst/script/weight-class.h>
namespace fst {
namespace script {
struct PruneOptions {
const WeightClass &weight_threshold;
int64 state_threshold;
std::unique_ptr<const std::vector<WeightClass>> distance;
float delta;
PruneOptions(const WeightClass &w, int64 s,
std::vector<WeightClass> *d = nullptr, float e = kDelta)
: weight_threshold(w), state_threshold(s), distance(d), delta(e) {}
private:
PruneOptions(); // Forbids this.
};
// This function transforms a script-land PruneOptions into a lib-land
// PruneOptions. If the original opts.distance is not null, a new distance will
// be created with new; the client is responsible for deleting this.
template <class A>
fst::PruneOptions<A, AnyArcFilter<A>> ConvertPruneOptions(
const PruneOptions &opts) {
typedef typename A::Weight Weight;
typedef typename A::StateId StateId;
Weight weight_threshold = *(opts.weight_threshold.GetWeight<Weight>());
StateId state_threshold = opts.state_threshold;
std::unique_ptr<std::vector<Weight>> distance;
if (opts.distance) {
distance.reset(new std::vector<Weight>(opts.distance->size()));
for (auto i = 0; i < opts.distance->size(); ++i)
(*distance)[i] = *((*opts.distance)[i].GetWeight<Weight>());
}
return fst::PruneOptions<A, AnyArcFilter<A>>(weight_threshold,
state_threshold, AnyArcFilter<A>(), distance.get(), opts.delta);
}
// 1
typedef args::Package<MutableFstClass *, const PruneOptions &> PruneArgs1;
template <class Arc>
void Prune(PruneArgs1 *args) {
MutableFst<Arc> *ofst = args->arg1->GetMutableFst<Arc>();
fst::PruneOptions<Arc, AnyArcFilter<Arc>> opts =
ConvertPruneOptions<Arc>(args->arg2);
Prune(ofst, opts);
}
// 2
typedef args::Package<const FstClass &, MutableFstClass *, const PruneOptions &>
PruneArgs2;
template <class Arc>
void Prune(PruneArgs2 *args) {
const Fst<Arc> &ifst = *(args->arg1.GetFst<Arc>());
MutableFst<Arc> *ofst = args->arg2->GetMutableFst<Arc>();
fst::PruneOptions<Arc, AnyArcFilter<Arc>> opts =
ConvertPruneOptions<Arc>(args->arg3);
Prune(ifst, ofst, opts);
}
// 3
typedef args::Package<const FstClass &, MutableFstClass *, const WeightClass &,
int64, float> PruneArgs3;
template <class Arc>
void Prune(PruneArgs3 *args) {
const Fst<Arc> &ifst = *(args->arg1.GetFst<Arc>());
MutableFst<Arc> *ofst = args->arg2->GetMutableFst<Arc>();
typename Arc::Weight weight_threshold =
*(args->arg3.GetWeight<typename Arc::Weight>());
Prune(ifst, ofst, weight_threshold, args->arg4, args->arg5);
}
// 4
typedef args::Package<MutableFstClass *, const WeightClass &, int64, float>
PruneArgs4;
template <class Arc>
void Prune(PruneArgs4 *args) {
MutableFst<Arc> *fst = args->arg1->GetMutableFst<Arc>();
typename Arc::Weight weight_threshold =
*(args->arg2.GetWeight<typename Arc::Weight>());
Prune(fst, weight_threshold, args->arg3, args->arg4);
}
// 1
void Prune(MutableFstClass *fst, const PruneOptions &opts);
// 2
void Prune(const FstClass &ifst, MutableFstClass *fst,
const PruneOptions &opts);
// 3
void Prune(const FstClass &ifst, MutableFstClass *ofst,
const WeightClass &weight_threshold,
int64 state_threshold = kNoStateId,
float delta = kDelta);
// 4
void Prune(MutableFstClass *fst, const WeightClass &weight_threshold,
int64 state_threshold, float delta);
} // namespace script
} // namespace fst
#endif // FST_SCRIPT_PRUNE_H_
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