minor changes, added ALL required externals

user/ESP8266lib/data/Bitstream.h

@@ -0,0 +1,62 @@
+#ifndef BITSTREAM_H
+#define BITSTREAM_H
+
+#include <cstdint>
+
+template <int maxBytes> class Bitstream {
+
+public:
+
+	inline void reset() {
+		bitMask = 128;				// start with the MSB
+		curIdx = 0;					// start with the first byte
+		buffer[curIdx] = 0;			// initialize all bits with zero
+		numBitsUsed = 0;			// nothing added
+	}
+
+	inline void addOne() {
+		buffer[curIdx] |= (0xFF & bitMask);
+		bitMask >>= 1;
+		++numBitsUsed;
+		checkNextByte();
+	}
+
+	inline void addZero() {
+		bitMask >>= 1;
+		++numBitsUsed;
+		checkNextByte();
+	}
+
+	const uint8_t* getData() const {
+		return buffer;
+	}
+
+	/** number of used bits */
+	inline uint16_t getNumBits() const {
+		return numBitsUsed;
+	}
+
+	/** number of used bytes. rounded-up to multiples of 8-bits */
+	inline uint8_t getNumBytes() const {
+		return (numBitsUsed - 1) / 8 + 1;
+	}
+
+private:
+
+	/** received 8 bits? byte complete? -> next one */
+	inline void checkNextByte() {
+		if(bitMask == 0) {
+			bitMask = 128;				// start with the MSB
+			++curIdx;					// next byte
+			buffer[curIdx] = 0;			// initialize all bits with zero
+		}
+	}
+
+	uint16_t	numBitsUsed = 0;
+	uint8_t		buffer[maxBytes];		//buffer containing received bits
+	uint8_t		curIdx = 0;				//index pointing to the byte currently selected within the buffer
+	uint8_t		bitMask	= 128;			//mask for the next bit to write
+
+};
+
+#endif // BITSTREAM_H