Small library for using circular buffers (forked from François Berder's implementation in order to add methods and fix problems)
Dependents: CircularBufferTest XBeeApi
Fork of CircularBuffer by
Test suite can be found in this application, CircularBufferTest
CircularBuffer.h
- Committer:
- feb11
- Date:
- 2013-09-20
- Revision:
- 2:6f3630f5fa06
- Parent:
- 1:9953890d59e2
- Child:
- 3:9a45d6675e65
File content as of revision 2:6f3630f5fa06:
#ifndef CIRCULAR_BUFFER_H #define CIRCULAR_BUFFER_H template<size_t T> class CircularBuffer { public : CircularBuffer(); uint32_t read(uint8_t *data, uint32_t length); uint32_t write(uint8_t *data, uint32_t length); uint32_t getCapacity() const; uint32_t getSize() const; private : uint16_t readIndex, writeIndex; uint8_t buffer[T]; }; template<size_t T> CircularBuffer<T>::CircularBuffer(): readIndex(0), writeIndex(0) { } template<size_t T> uint32_t CircularBuffer<T>::read(uint8_t *data, uint32_t length) { uint32_t n = 0; while(n < length && getSize() < T) { if(readIndex == T) readIndex = 0; data[n++] = buffer[readIndex++]; } return n; } template<size_t T> uint32_t CircularBuffer<T>::write(uint8_t *data, uint32_t length) { uint32_t n = 0; while(n < length && getSize() > 0) { if(writeIndex == T) writeIndex = 0; buffer[writeIndex++] = data[n++]; } return n; } template<size_t T> uint32_t CircularBuffer<T>::getCapacity() const { return T; } template<size_t T> uint32_t CircularBuffer<T>::getSize() const { return ((writeIndex >= readIndex) ? (T - writeIndex + readIndex) : (readIndex - writeIndex)); } typedef CircularBuffer<32> SmallCircularBuffer; typedef CircularBuffer<128> MediumCircularBuffer; typedef CircularBuffer<512> BigCircularBuffer; #endif