// See www.openfst.org for extensive documentation on this weighted
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// finite-state transducer library.
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//
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// Creates a finite-state archive from component FSTs.
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#ifndef FST_EXTENSIONS_FAR_CREATE_H_
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#define FST_EXTENSIONS_FAR_CREATE_H_
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#include <sstream>
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#include <string>
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#include <vector>
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#include <fst/extensions/far/far.h>
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namespace fst {
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template <class Arc>
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void FarCreate(const std::vector<string> &in_fnames, const string &out_fname,
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const int32 generate_keys, const FarType &far_type,
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const string &key_prefix, const string &key_suffix) {
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std::unique_ptr<FarWriter<Arc>> far_writer(
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FarWriter<Arc>::Create(out_fname, far_type));
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if (!far_writer) return;
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for (size_t i = 0; i < in_fnames.size(); ++i) {
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std::unique_ptr<Fst<Arc>> ifst(Fst<Arc>::Read(in_fnames[i]));
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if (!ifst) return;
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string key;
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if (generate_keys > 0) {
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std::ostringstream keybuf;
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keybuf.width(generate_keys);
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keybuf.fill('0');
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keybuf << i + 1;
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key = keybuf.str();
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} else {
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auto *filename = new char[in_fnames[i].size() + 1];
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strcpy(filename, in_fnames[i].c_str());
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key = basename(filename);
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delete[] filename;
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}
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far_writer->Add(key_prefix + key + key_suffix, *ifst);
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}
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}
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} // namespace fst
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#endif // FST_EXTENSIONS_FAR_CREATE_H_
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