first commit for takway.ai

runtime/onnxruntime/third_party/openfst/src/bin/fstcompose-main.cc

@@ -0,0 +1,72 @@
+// See www.openfst.org for extensive documentation on this weighted
+// finite-state transducer library.
+//
+// Composes two FSTs.
+
+#include <cstring>
+
+#include <memory>
+#include <string>
+
+#include <fst/flags.h>
+#include <fst/log.h>
+#include <fst/script/compose.h>
+#include <fst/script/getters.h>
+
+DECLARE_string(compose_filter);
+DECLARE_bool(connect);
+
+int fstcompose_main(int argc, char **argv) {
+  namespace s = fst::script;
+  using fst::ComposeFilter;
+  using fst::ComposeOptions;
+  using fst::script::FstClass;
+  using fst::script::VectorFstClass;
+
+  string usage = "Composes two FSTs.\n\n  Usage: ";
+  usage += argv[0];
+  usage += " in1.fst in2.fst [out.fst]\n";
+
+  std::set_new_handler(FailedNewHandler);
+  SET_FLAGS(usage.c_str(), &argc, &argv, true);
+  if (argc < 3 || argc > 4) {
+    ShowUsage();
+    return 1;
+  }
+
+  const string in1_name = strcmp(argv[1], "-") != 0 ? argv[1] : "";
+  const string in2_name =
+      (argc > 2 && (strcmp(argv[2], "-") != 0)) ? argv[2] : "";
+  const string out_name = argc > 3 ? argv[3] : "";
+
+  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 (ifst1->ArcType() != ifst2->ArcType()) {
+    LOG(ERROR) << argv[0] << ": Input FSTs must have the same arc type";
+    return 1;
+  }
+
+  VectorFstClass ofst(ifst1->ArcType());
+
+  ComposeFilter compose_filter;
+  if (!s::GetComposeFilter(FLAGS_compose_filter, &compose_filter)) {
+    LOG(ERROR) << argv[0] << ": Unknown or unsupported compose filter type: "
+               << FLAGS_compose_filter;
+    return 1;
+  }
+
+  const ComposeOptions opts(FLAGS_connect, compose_filter);
+
+  s::Compose(*ifst1, *ifst2, &ofst, opts);
+
+  return !ofst.Write(out_name);
+}