arch/alpha/alpha_linux_process.cc: arch/alpha/alpha_linux_process.hh: arch/alpha/alpha_memory.cc: arch/alpha/alpha_memory.hh: arch/alpha/alpha_tru64_process.cc: arch/alpha/alpha_tru64_process.hh: arch/alpha/aout_machdep.h: arch/alpha/arguments.cc: arch/alpha/arguments.hh: arch/alpha/faults.cc: arch/alpha/faults.hh: arch/alpha/isa_traits.hh: arch/alpha/osfpal.cc: arch/alpha/osfpal.hh: arch/alpha/pseudo_inst.cc: arch/alpha/pseudo_inst.hh: arch/alpha/vptr.hh: arch/alpha/vtophys.cc: arch/alpha/vtophys.hh: base/bitfield.hh: base/callback.hh: base/circlebuf.cc: base/circlebuf.hh: base/compression/lzss_compression.cc: base/compression/lzss_compression.hh: base/compression/null_compression.hh: base/cprintf.cc: base/cprintf.hh: base/cprintf_formats.hh: base/date.cc: base/dbl_list.hh: base/endian.hh: base/fast_alloc.cc: base/fast_alloc.hh: 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/intmath.hh: 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/object_file.cc: base/loader/object_file.hh: base/loader/symtab.cc: base/loader/symtab.hh: base/misc.cc: base/misc.hh: base/mod_num.hh: base/mysql.cc: base/mysql.hh: base/pollevent.cc: base/pollevent.hh: base/predictor.hh: base/random.cc: base/random.hh: base/range.cc: base/range.hh: base/refcnt.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/socket.hh: base/statistics.cc: base/statistics.hh: base/stats/events.cc: base/stats/events.hh: base/stats/flags.hh: base/stats/mysql.cc: base/stats/mysql.hh: base/stats/mysql_run.hh: base/stats/output.hh: base/stats/statdb.cc: base/stats/statdb.hh: base/stats/text.cc: base/stats/text.hh: base/stats/types.hh: base/stats/visit.cc: base/stats/visit.hh: base/str.cc: base/str.hh: base/time.cc: base/time.hh: base/trace.cc: base/trace.hh: base/userinfo.cc: base/userinfo.hh: cpu/base_cpu.cc: cpu/base_cpu.hh: cpu/exec_context.cc: cpu/exec_context.hh: cpu/exetrace.cc: cpu/exetrace.hh: cpu/full_cpu/op_class.hh: cpu/full_cpu/smt.hh: cpu/inst_seq.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/baddev.cc: dev/baddev.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.cc: dev/etherpkt.hh: dev/ethertap.cc: dev/ethertap.hh: dev/ide_ctrl.cc: dev/ide_ctrl.hh: dev/ide_disk.cc: dev/ide_disk.hh: dev/io_device.cc: dev/io_device.hh: dev/ns_gige.cc: dev/ns_gige.hh: dev/ns_gige_reg.h: dev/pciconfigall.cc: dev/pciconfigall.hh: dev/pcidev.cc: dev/pcidev.hh: dev/pcireg.h: dev/platform.cc: dev/platform.hh: dev/simple_disk.cc: dev/simple_disk.hh: dev/tsunami.cc: dev/tsunami.hh: dev/tsunami_cchip.cc: dev/tsunami_cchip.hh: dev/tsunami_io.cc: dev/tsunami_io.hh: dev/tsunami_pchip.cc: dev/tsunami_pchip.hh: dev/tsunami_uart.hh: dev/tsunamireg.h: docs/stl.hh: kern/linux/linux.hh: kern/linux/linux_syscalls.cc: kern/linux/linux_syscalls.hh: kern/linux/linux_system.cc: kern/linux/linux_system.hh: kern/system_events.cc: kern/system_events.hh: kern/tru64/dump_mbuf.cc: kern/tru64/dump_mbuf.hh: kern/tru64/mbuf.hh: kern/tru64/printf.cc: kern/tru64/printf.hh: kern/tru64/tru64.hh: kern/tru64/tru64_events.cc: kern/tru64/tru64_events.hh: kern/tru64/tru64_syscalls.cc: kern/tru64/tru64_syscalls.hh: kern/tru64/tru64_system.cc: kern/tru64/tru64_system.hh: sim/async.hh: sim/builder.cc: sim/builder.hh: sim/debug.cc: sim/debug.hh: sim/eventq.cc: sim/eventq.hh: sim/host.hh: sim/main.cc: sim/param.cc: sim/param.hh: sim/process.cc: sim/process.hh: sim/serialize.cc: sim/serialize.hh: sim/sim_events.cc: sim/sim_events.hh: sim/sim_exit.hh: sim/sim_object.cc: sim/sim_object.hh: sim/stat_control.cc: sim/stat_control.hh: sim/stats.hh: sim/syscall_emul.cc: sim/syscall_emul.hh: sim/system.cc: sim/system.hh: sim/universe.cc: test/bitvectest.cc: test/circletest.cc: test/cprintftest.cc: test/initest.cc: test/lru_test.cc: test/nmtest.cc: test/offtest.cc: test/paramtest.cc: test/rangetest.cc: test/sized_test.cc: test/stattest.cc: test/strnumtest.cc: test/symtest.cc: test/tokentest.cc: test/tracetest.cc: util/m5/m5.c: util/m5/m5op.h: util/tap/tap.cc: Updated Copyright dev/console.cc: dev/console.hh: This code isn't ours, and shouldn't have our copyright --HG-- extra : convert_revision : 598f2e5eab5d5d3de2c1e862b389086e3212f7c4
213 lines
4.9 KiB
C++
213 lines
4.9 KiB
C++
/*
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* Copyright (c) 2002-2003 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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