what the console output is. base/circlebuf.hh: base/circlebuf.cc: add stuff to spit to an ostream prepend _ in front of protected member variables formatting dev/console.hh: dev/console.cc: Add DPRINTF to spit out the lines of console data dev/console.cc: little hack to append name() to the file so that we can easily get multiple output files. dev/console.hh: TRACING_ON == 1 not defined(TRACING_ON) --HG-- extra : convert_revision : bbe80715fb97ee4c4ed6b484955ef71289f09fc9
213 lines
4.9 KiB
C++
213 lines
4.9 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <algorithm>
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#include <string>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "base/circlebuf.hh"
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#include "base/cprintf.hh"
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#include "base/intmath.hh"
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using namespace std;
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CircleBuf::CircleBuf(int l)
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: _rollover(false), _buflen(l), _size(0), _start(0), _stop(0)
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{
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_buf = new char[_buflen];
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}
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CircleBuf::~CircleBuf()
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{
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if (_buf)
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delete [] _buf;
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}
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void
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CircleBuf::dump()
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{
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cprintf("start = %10d, stop = %10d, buflen = %10d\n",
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_start, _stop, _buflen);
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fflush(stdout);
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::write(STDOUT_FILENO, _buf, _buflen);
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::write(STDOUT_FILENO, "<\n", 2);
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}
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void
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CircleBuf::flush()
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{
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_start = 0;
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_stop = 0;
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_rollover = false;
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}
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void
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CircleBuf::read(char *b, int len)
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{
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_size -= len;
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if (_size < 0)
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_size = 0;
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if (_stop > _start) {
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len = min(len, _stop - _start);
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memcpy(b, _buf + _start, len);
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_start += len;
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}
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else {
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int endlen = _buflen - _start;
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if (endlen > len) {
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memcpy(b, _buf + _start, len);
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_start += len;
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}
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else {
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memcpy(b, _buf + _start, endlen);
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_start = min(len - endlen, _stop);
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memcpy(b + endlen, _buf, _start);
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}
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}
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}
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void
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CircleBuf::read(int fd, int len)
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{
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_size -= len;
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if (_size < 0)
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_size = 0;
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if (_stop > _start) {
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len = min(len, _stop - _start);
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::write(fd, _buf + _start, len);
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_start += len;
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}
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else {
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int endlen = _buflen - _start;
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if (endlen > len) {
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::write(fd, _buf + _start, len);
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_start += len;
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}
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else {
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::write(fd, _buf + _start, endlen);
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_start = min(len - endlen, _stop);
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::write(fd, _buf, _start);
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}
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}
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}
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void
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CircleBuf::read(int fd)
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{
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_size = 0;
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if (_stop > _start) {
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::write(fd, _buf + _start, _stop - _start);
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}
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else {
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::write(fd, _buf + _start, _buflen - _start);
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::write(fd, _buf, _stop);
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}
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_start = _stop;
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}
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void
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CircleBuf::read(ostream &out)
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{
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_size = 0;
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if (_stop > _start) {
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out.write(_buf + _start, _stop - _start);
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}
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else {
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out.write(_buf + _start, _buflen - _start);
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out.write(_buf, _stop);
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}
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_start = _stop;
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}
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void
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CircleBuf::readall(int fd)
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{
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if (_rollover)
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::write(fd, _buf + _stop, _buflen - _stop);
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::write(fd, _buf, _stop);
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_start = _stop;
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}
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void
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CircleBuf::write(char b)
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{
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write(&b, 1);
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}
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void
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CircleBuf::write(const char *b)
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{
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write(b, strlen(b));
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}
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void
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CircleBuf::write(const char *b, int len)
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{
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if (len <= 0)
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return;
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_size += len;
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if (_size > _buflen)
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_size = _buflen;
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int old_start = _start;
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int old_stop = _stop;
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if (len >= _buflen) {
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_start = 0;
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_stop = _buflen;
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_rollover = true;
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memcpy(_buf, b + (len - _buflen), _buflen);
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return;
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}
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if (_stop + len <= _buflen) {
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memcpy(_buf + _stop, b, len);
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_stop += len;
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} else {
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int end_len = _buflen - old_stop;
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_stop = len - end_len;
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memcpy(_buf + old_stop, b, end_len);
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memcpy(_buf, b + end_len, _stop);
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_rollover = true;
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}
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if (old_start > old_stop && old_start < _stop ||
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old_start < old_stop && _stop < old_stop)
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_start = _stop + 1;
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}
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