diff options
Diffstat (limited to 'base/circlebuf.cc')
| -rw-r--r-- | base/circlebuf.cc | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/base/circlebuf.cc b/base/circlebuf.cc deleted file mode 100644 index 89bbfd822..000000000 --- a/base/circlebuf.cc +++ /dev/null @@ -1,213 +0,0 @@ -/* - * Copyright (c) 2002-2005 The Regents of The University of Michigan - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer; - * redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution; - * neither the name of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <algorithm> -#include <string> - -#include <stdio.h> -#include <string.h> -#include <unistd.h> - -#include "base/circlebuf.hh" -#include "base/cprintf.hh" -#include "base/intmath.hh" - -using namespace std; - -CircleBuf::CircleBuf(int l) - : _rollover(false), _buflen(l), _size(0), _start(0), _stop(0) -{ - _buf = new char[_buflen]; -} - -CircleBuf::~CircleBuf() -{ - if (_buf) - delete [] _buf; -} - -void -CircleBuf::dump() -{ - cprintf("start = %10d, stop = %10d, buflen = %10d\n", - _start, _stop, _buflen); - fflush(stdout); - ::write(STDOUT_FILENO, _buf, _buflen); - ::write(STDOUT_FILENO, "<\n", 2); -} - -void -CircleBuf::flush() -{ - _start = 0; - _stop = 0; - _rollover = false; -} - -void -CircleBuf::read(char *b, int len) -{ - _size -= len; - if (_size < 0) - _size = 0; - - if (_stop > _start) { - len = min(len, _stop - _start); - memcpy(b, _buf + _start, len); - _start += len; - } - else { - int endlen = _buflen - _start; - if (endlen > len) { - memcpy(b, _buf + _start, len); - _start += len; - } - else { - memcpy(b, _buf + _start, endlen); - _start = min(len - endlen, _stop); - memcpy(b + endlen, _buf, _start); - } - } -} - -void -CircleBuf::read(int fd, int len) -{ - _size -= len; - if (_size < 0) - _size = 0; - - if (_stop > _start) { - len = min(len, _stop - _start); - ::write(fd, _buf + _start, len); - _start += len; - } - else { - int endlen = _buflen - _start; - if (endlen > len) { - ::write(fd, _buf + _start, len); - _start += len; - } - else { - ::write(fd, _buf + _start, endlen); - _start = min(len - endlen, _stop); - ::write(fd, _buf, _start); - } - } -} - -void -CircleBuf::read(int fd) -{ - _size = 0; - - if (_stop > _start) { - ::write(fd, _buf + _start, _stop - _start); - } - else { - ::write(fd, _buf + _start, _buflen - _start); - ::write(fd, _buf, _stop); - } - - _start = _stop; -} - -void -CircleBuf::read(ostream &out) -{ - _size = 0; - - if (_stop > _start) { - out.write(_buf + _start, _stop - _start); - } - else { - out.write(_buf + _start, _buflen - _start); - out.write(_buf, _stop); - } - - _start = _stop; -} - -void -CircleBuf::readall(int fd) -{ - if (_rollover) - ::write(fd, _buf + _stop, _buflen - _stop); - - ::write(fd, _buf, _stop); - _start = _stop; -} - -void -CircleBuf::write(char b) -{ - write(&b, 1); -} - -void -CircleBuf::write(const char *b) -{ - write(b, strlen(b)); -} - -void -CircleBuf::write(const char *b, int len) -{ - if (len <= 0) - return; - - _size += len; - if (_size > _buflen) - _size = _buflen; - - int old_start = _start; - int old_stop = _stop; - - if (len >= _buflen) { - _start = 0; - _stop = _buflen; - _rollover = true; - memcpy(_buf, b + (len - _buflen), _buflen); - return; - } - - if (_stop + len <= _buflen) { - memcpy(_buf + _stop, b, len); - _stop += len; - } else { - int end_len = _buflen - old_stop; - _stop = len - end_len; - memcpy(_buf + old_stop, b, end_len); - memcpy(_buf, b + end_len, _stop); - _rollover = true; - } - - if (old_start > old_stop && old_start < _stop || - old_start < old_stop && _stop < old_stop) - _start = _stop + 1; -} |