// See www.openfst.org for extensive documentation on this weighted
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// finite-state transducer library.
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#ifndef FST_EXTENSIONS_FAR_EQUAL_H_
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#define FST_EXTENSIONS_FAR_EQUAL_H_
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#include <memory>
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#include <string>
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#include <fst/extensions/far/far.h>
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#include <fst/equal.h>
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namespace fst {
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template <class Arc>
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bool FarEqual(const string &filename1, const string &filename2,
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float delta = kDelta, const string &begin_key = string(),
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const string &end_key = string()) {
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std::unique_ptr<FarReader<Arc>> reader1(FarReader<Arc>::Open(filename1));
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if (!reader1) {
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LOG(ERROR) << "FarEqual: Could not open FAR file " << filename1;
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return false;
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}
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std::unique_ptr<FarReader<Arc>> reader2(FarReader<Arc>::Open(filename2));
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if (!reader2) {
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LOG(ERROR) << "FarEqual: Could not open FAR file " << filename2;
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return false;
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}
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if (!begin_key.empty()) {
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bool find_begin1 = reader1->Find(begin_key);
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bool find_begin2 = reader2->Find(begin_key);
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if (!find_begin1 || !find_begin2) {
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bool ret = !find_begin1 && !find_begin2;
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if (!ret) {
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LOG(ERROR) << "FarEqual: Key " << begin_key << " missing from "
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<< (find_begin1 ? "second" : "first") << " archive";
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}
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return ret;
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}
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}
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for (; !reader1->Done() && !reader2->Done();
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reader1->Next(), reader2->Next()) {
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const auto &key1 = reader1->GetKey();
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const auto &key2 = reader2->GetKey();
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if (!end_key.empty() && end_key < key1 && end_key < key2) {
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return true;
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}
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if (key1 != key2) {
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LOG(ERROR) << "FarEqual: Mismatched keys " << key1 << " and " << key2;
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return false;
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}
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if (!Equal(*(reader1->GetFst()), *(reader2->GetFst()), delta)) {
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LOG(ERROR) << "FarEqual: FSTs for key " << key1 << " are not equal";
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return false;
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}
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}
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if (!reader1->Done() || !reader2->Done()) {
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LOG(ERROR) << "FarEqual: Key "
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<< (reader1->Done() ? reader2->GetKey() : reader1->GetKey())
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<< " missing from " << (reader2->Done() ? "first" : "second")
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<< " archive";
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return false;
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}
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return true;
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}
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} // namespace fst
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#endif // FST_EXTENSIONS_FAR_EQUAL_H_
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