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lib/ArduinoStreamUtils/src/StreamUtils/Policies/WriteSpyingPolicy.hpp

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+// StreamUtils - github.com/bblanchon/ArduinoStreamUtils
+// Copyright Benoit Blanchon 2019-2021
+// MIT License
+
+#pragma once
+
+#include <Stream.h>
+
+#include "../Configuration.hpp"
+
+namespace StreamUtils {
+
+class WriteSpyingPolicy {
+ public:
+  WriteSpyingPolicy(Print &log) : _log(log) {}
+
+  size_t write(Print &stream, const uint8_t *buffer, size_t size) {
+    _log.print("write('");
+    for (size_t i = 0; i < size; i++) {
+      _log.write(buffer[i]);
+    }
+    _log.print("', ");
+    _log.print(size);
+    _log.print(") -> ");
+
+    size_t result = stream.write(buffer, size);
+    _log.println(result);
+
+    return result;
+  }
+
+  size_t write(Print &stream, uint8_t data) {
+    _log.print("write('");
+    _log.write(data);
+    _log.print("') -> ");
+
+    size_t result = stream.write(data);
+    _log.println(result);
+
+    return result;
+  }
+
+  template <typename TTarget>
+  void flush(TTarget &target) {
+    _log.println("flush()");
+    target.flush();
+  }
+
+  void implicitFlush(Print &) {}
+
+ private:
+  Print &_log;
+};
+
+}  // namespace StreamUtils