gem5/base/circlebuf.cc
Steve Reinhardt 25693e9e69 Make include paths explicit and update makefile accordingly.
arch/alpha/alpha_memory.cc:
arch/alpha/alpha_memory.hh:
arch/alpha/arguments.cc:
arch/alpha/arguments.hh:
arch/alpha/ev5.cc:
arch/alpha/ev5.hh:
arch/alpha/fake_syscall.cc:
arch/alpha/faults.cc:
arch/alpha/isa_desc:
arch/alpha/isa_traits.hh:
arch/alpha/osfpal.cc:
arch/alpha/vtophys.cc:
arch/alpha/vtophys.hh:
base/circlebuf.cc:
base/compression/lzss_compression.cc:
base/compression/lzss_compression.hh:
base/cprintf.cc:
base/cprintf.hh:
base/fast_alloc.cc:
base/fifo_buffer.cc:
base/fifo_buffer.hh:
base/hashmap.hh:
base/hostinfo.cc:
base/hostinfo.hh:
base/hybrid_pred.cc:
base/hybrid_pred.hh:
base/inet.cc:
base/inet.hh:
base/inifile.cc:
base/inifile.hh:
base/intmath.cc:
base/loader/aout_object.cc:
base/loader/aout_object.hh:
base/loader/ecoff_object.cc:
base/loader/ecoff_object.hh:
base/loader/elf_object.cc:
base/loader/elf_object.hh:
base/loader/exec_aout.h:
base/loader/exec_ecoff.h:
base/loader/object_file.cc:
base/loader/object_file.hh:
base/loader/symtab.cc:
base/loader/symtab.hh:
base/misc.cc:
base/misc.hh:
base/pollevent.cc:
base/pollevent.hh:
base/random.cc:
base/random.hh:
base/range.hh:
base/remote_gdb.cc:
base/remote_gdb.hh:
base/res_list.hh:
base/sat_counter.cc:
base/sat_counter.hh:
base/sched_list.hh:
base/socket.cc:
base/statistics.cc:
base/statistics.hh:
base/str.cc:
base/trace.cc:
base/trace.hh:
cpu/base_cpu.cc:
cpu/base_cpu.hh:
cpu/exec_context.cc:
cpu/exec_context.hh:
cpu/exetrace.cc:
cpu/exetrace.hh:
cpu/intr_control.cc:
cpu/intr_control.hh:
cpu/memtest/memtest.cc:
cpu/memtest/memtest.hh:
cpu/pc_event.cc:
cpu/pc_event.hh:
cpu/simple_cpu/simple_cpu.cc:
cpu/simple_cpu/simple_cpu.hh:
cpu/static_inst.cc:
cpu/static_inst.hh:
dev/alpha_console.cc:
dev/alpha_console.hh:
dev/console.cc:
dev/console.hh:
dev/disk_image.cc:
dev/disk_image.hh:
dev/etherbus.cc:
dev/etherbus.hh:
dev/etherdump.cc:
dev/etherdump.hh:
dev/etherint.cc:
dev/etherint.hh:
dev/etherlink.cc:
dev/etherlink.hh:
dev/etherpkt.hh:
dev/ethertap.cc:
dev/ethertap.hh:
dev/simple_disk.cc:
dev/simple_disk.hh:
kern/tru64/tru64_syscalls.cc:
kern/tru64/tru64_syscalls.hh:
sim/debug.cc:
sim/eventq.cc:
sim/eventq.hh:
sim/main.cc:
sim/param.cc:
sim/param.hh:
sim/prog.cc:
sim/prog.hh:
sim/serialize.cc:
sim/serialize.hh:
sim/sim_events.cc:
sim/sim_events.hh:
sim/sim_object.cc:
sim/sim_object.hh:
sim/sim_time.cc:
sim/system.cc:
sim/system.hh:
sim/universe.cc:
test/circletest.cc:
test/cprintftest.cc:
test/initest.cc:
test/nmtest.cc:
test/offtest.cc:
test/paramtest.cc:
test/rangetest.cc:
test/stattest.cc:
test/strnumtest.cc:
test/symtest.cc:
test/tokentest.cc:
test/tracetest.cc:
util/tap/tap.cc:
    Make include paths explicit.

--HG--
extra : convert_revision : 941cbdc591fd4d3d1d9f095cd58fc23dd2d73840
2003-10-10 11:09:00 -07:00

187 lines
4.2 KiB
C++

/*
* Copyright (c) 2003 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::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;
}