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tools/openfst-1.6.7/src/bin/fstequivalent-main.cc
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// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
//
// Two DFAs are equivalent iff their exit status is zero.
#include <cstring>
#include <memory>
#include <string>
#include <fst/flags.h>
#include <fst/log.h>
#include <fst/script/equivalent.h>
#include <fst/script/getters.h>
#include <fst/script/randequivalent.h>
DECLARE_double(delta);
DECLARE_bool(random);
DECLARE_int32(max_length);
DECLARE_int32(npath);
DECLARE_int32(seed);
DECLARE_string(select);
int fstequivalent_main(int argc, char **argv) {
namespace s = fst::script;
using fst::RandGenOptions;
using fst::script::FstClass;
string usage =
"Two DFAs are equivalent iff the exit status is zero.
"
" Usage: ";
usage += argv[0];
usage += " in1.fst in2.fst
";
std::set_new_handler(FailedNewHandler);
SET_FLAGS(usage.c_str(), &argc, &argv, true);
if (argc != 3) {
ShowUsage();
return 1;
}
const string in1_name = strcmp(argv[1], "-") == 0 ? "" : argv[1];
const string in2_name = strcmp(argv[2], "-") == 0 ? "" : argv[2];
if (in1_name.empty() && in2_name.empty()) {
LOG(ERROR) << argv[0] << ": Can't take both inputs from standard input";
return 1;
}
std::unique_ptr<FstClass> ifst1(FstClass::Read(in1_name));
if (!ifst1) return 1;
std::unique_ptr<FstClass> ifst2(FstClass::Read(in2_name));
if (!ifst2) return 1;
if (!FLAGS_random) {
bool result = s::Equivalent(*ifst1, *ifst2, FLAGS_delta);
if (!result) VLOG(1) << "FSTs are not equivalent";
return result ? 0 : 2;
} else {
s::RandArcSelection ras;
if (!s::GetRandArcSelection(FLAGS_select, &ras)) {
LOG(ERROR) << argv[0] << ": Unknown or unsupported select type "
<< FLAGS_select;
return 1;
}
const RandGenOptions<s::RandArcSelection> opts(ras, FLAGS_max_length);
bool result = s::RandEquivalent(*ifst1, *ifst2, FLAGS_npath, FLAGS_delta,
FLAGS_seed, opts);
if (!result) VLOG(1) << "FSTs are not equivalent";
return result ? 0 : 2;
}
}
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