local libs

lib/async-mqtt-client/src/AsyncMqttClient/Helpers.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+namespace AsyncMqttClientInternals {
+class Helpers {
+ public:
+  static uint32_t decodeRemainingLength(char* bytes) {
+    uint32_t multiplier = 1;
+    uint32_t value = 0;
+    uint8_t currentByte = 0;
+    uint8_t encodedByte;
+    do {
+      encodedByte = bytes[currentByte++];
+      value += (encodedByte & 127) * multiplier;
+      multiplier *= 128;
+    } while ((encodedByte & 128) != 0);
+
+    return value;
+  }
+
+  static uint8_t encodeRemainingLength(uint32_t remainingLength, char* destination) {
+    uint8_t currentByte = 0;
+    uint8_t bytesNeeded = 0;
+
+    do {
+      uint8_t encodedByte = remainingLength % 128;
+      remainingLength /= 128;
+      if (remainingLength > 0) {
+        encodedByte = encodedByte | 128;
+      }
+
+      destination[currentByte++] = encodedByte;
+      bytesNeeded++;
+    } while (remainingLength > 0);
+
+    return bytesNeeded;
+  }
+};
+}  // namespace AsyncMqttClientInternals