Suga koubou
/
Phone_ip_test
mbed Phone Platform UDP to DAC/ADC test
Diff: RingBuffer/RingBuffer.cpp
- Revision:
- 0:c0c1269a8f51
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RingBuffer/RingBuffer.cpp Wed Dec 01 14:35:05 2010 +0000 @@ -0,0 +1,84 @@ +/* + * mbed library for RingBuffer + * Copyright (c) 2010 Hiroshi Suga + * Released under the MIT License: http://mbed.org/license/mit + */ + +#include "RingBuffer.h" + +RingBuffer::RingBuffer (int p_size) { + size = p_size + 1; + buf = new char[size]; + addr_w = 0; + addr_r = 0; +} + +RingBuffer::~RingBuffer () { + delete [] buf; +} + +int RingBuffer::put (char dat) { + int next; + + next = (addr_w + 1) % size; + if (next == addr_r) { + return -1; + } + buf[addr_w] = dat; + addr_w = next; + return dat; +} + +int RingBuffer::put (char *dat, int len) { + int next, i; + + + for (i = 0; i < len; i ++) { + next = (addr_w + 1) % size; + if (next == addr_r) { + break; + } + buf[addr_w] = dat[i]; + addr_w = next; + } + return i; +} + +int RingBuffer::get (char &dat) { + if (addr_r == addr_w) { + return -1; + } + dat = buf[addr_r]; + addr_r = (addr_r + 1) % size; + return 0; +} + +int RingBuffer::get (char *dat, int len) { + int i; + + for (i = 0; i < len; i ++) { + if (addr_r == addr_w) { + break; + } + dat[i] = buf[addr_r]; + addr_r = (addr_r + 1) % size; + } + return i; +} + +int RingBuffer::available () { + if (addr_w < addr_r) { + return addr_r - addr_w - 1; + } else { + return (size - addr_w) + addr_r - 1; + } +} + +int RingBuffer::use () { + return size - available() - 1; +} + +void RingBuffer::clear () { + addr_w = 0; + addr_r = 0; +}