add streaming websocket server and client (#62)

sherpa-onnx/csrc/file-utils.h

@@ -0,0 +1,28 @@
+// sherpa-onnx/csrc/file-utils.h
+//
+// Copyright (c)  2022-2023  Xiaomi Corporation
+
+#ifndef SHERPA_ONNX_CSRC_FILE_UTILS_H_
+#define SHERPA_ONNX_CSRC_FILE_UTILS_H_
+
+#include <fstream>
+#include <string>
+
+namespace sherpa_onnx {
+
+/** Check whether a given path is a file or not
+ *
+ * @param filename Path to check.
+ * @return Return true if the given path is a file; return false otherwise.
+ */
+bool FileExists(const std::string &filename);
+
+/** Abort if the file does not exist.
+ *
+ * @param filename The file to check.
+ */
+void AssertFileExists(const std::string &filename);
+
+}  // namespace sherpa_onnx
+
+#endif  // SHERPA_ONNX_CSRC_FILE_UTILS_H_