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tools/openfst-1.6.7/include/fst/script/randequivalent.h
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
#ifndef FST_SCRIPT_RANDEQUIVALENT_H_
#define FST_SCRIPT_RANDEQUIVALENT_H_
#include <climits>
#include <ctime>
#include <tuple>
#include <fst/randequivalent.h>
#include <fst/script/arg-packs.h>
#include <fst/script/fst-class.h>
#include <fst/script/script-impl.h>
namespace fst {
namespace script {
using RandEquivalentInnerArgs = std::tuple<const FstClass &, const FstClass &,
int32, float, time_t, const RandGenOptions<RandArcSelection> &>;
using RandEquivalentArgs = WithReturnValue<bool, RandEquivalentInnerArgs>;
template <class Arc>
void RandEquivalent(RandEquivalentArgs *args) {
const Fst<Arc> &fst1 = *(std::get<0>(args->args).GetFst<Arc>());
const Fst<Arc> &fst2 = *(std::get<1>(args->args).GetFst<Arc>());
const auto seed = std::get<4>(args->args);
const auto &opts = std::get<5>(args->args);
switch (opts.selector) {
case UNIFORM_ARC_SELECTOR: {
const UniformArcSelector<Arc> selector(seed);
const RandGenOptions<UniformArcSelector<Arc>> ropts(selector,
opts.max_length);
args->retval = RandEquivalent(fst1, fst2, std::get<2>(args->args),
std::get<3>(args->args), ropts);
return;
}
case FAST_LOG_PROB_ARC_SELECTOR: {
const FastLogProbArcSelector<Arc> selector(seed);
const RandGenOptions<FastLogProbArcSelector<Arc>> ropts(selector,
opts.max_length);
args->retval = RandEquivalent(fst1, fst2, std::get<2>(args->args),
std::get<3>(args->args), ropts);
return;
}
case LOG_PROB_ARC_SELECTOR: {
const LogProbArcSelector<Arc> selector(seed);
const RandGenOptions<LogProbArcSelector<Arc>> ropts(selector,
opts.max_length);
args->retval = RandEquivalent(fst1, fst2, std::get<2>(args->args),
std::get<3>(args->args), ropts);
return;
}
}
}
bool RandEquivalent(const FstClass &fst1, const FstClass &fst2, int32 npath = 1,
float delta = kDelta, time_t seed = time(nullptr),
const RandGenOptions<RandArcSelection> &opts =
RandGenOptions<RandArcSelection>(UNIFORM_ARC_SELECTOR));
} // namespace script
} // namespace fst
#endif // FST_SCRIPT_RANDEQUIVALENT_H_
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