112 lines
2.7 KiB
C++
112 lines
2.7 KiB
C++
/*
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* Copyright (c) 2012 Juli Mallett. 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
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* are met:
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* 1. 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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* 2. 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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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <unistd.h>
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#include <event/event_callback.h>
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#include <event/event_system.h>
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#include <io/stream_handle.h>
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#include <xcodec/xcodec.h>
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#include <xcodec/xcodec_hash.h>
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class Sink {
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LogHandle log_;
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StreamHandle fd_;
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XCodecHash hash_;
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unsigned length_;
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Action *action_;
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public:
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Sink(int fd)
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: log_("/sink"),
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fd_(fd),
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hash_(),
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length_(0),
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action_(NULL)
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{
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EventCallback *cb = callback(this, &Sink::read_complete);
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action_ = fd_.read(0, cb);
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}
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~Sink()
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{
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ASSERT(log_, action_ == NULL);
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}
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void read_complete(Event e)
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{
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action_->cancel();
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action_ = NULL;
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switch (e.type_) {
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case Event::Done:
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case Event::EOS:
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break;
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default:
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HALT(log_) << "Unexpected event: " << e;
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return;
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}
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while (!e.buffer_.empty()) {
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BufferSegment *seg;
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e.buffer_.moveout(&seg);
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const uint8_t *p, *q = seg->end();
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if (length_ == XCODEC_SEGMENT_LENGTH) {
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for (p = seg->data(); p < q; p++) {
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hash_.roll(*p);
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}
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} else {
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for (p = seg->data(); p < q; p++) {
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if (length_ == XCODEC_SEGMENT_LENGTH) {
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hash_.roll(*p);
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} else {
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hash_.add(*p);
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length_++;
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}
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}
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}
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seg->unref();
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}
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if (e.type_ == Event::EOS) {
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fd_.close();
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return;
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}
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EventCallback *cb = callback(this, &Sink::read_complete);
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action_ = fd_.read(0, cb);
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}
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};
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int
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main(void)
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{
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Sink sink(STDIN_FILENO);
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event_system.run();
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}
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