version 3.0

xcodec/example/Makefile

@@ -0,0 +1,3 @@
+SUBDIR+=xcodec-hash-roll1
+
+include ../../common/subdir.mk

xcodec/example/xcodec-hash-roll1/Makefile

@@ -0,0 +1,7 @@
+PROGRAM=xcodec-hash-roll1
+
+SRCS+=	xcodec-hash-roll1.cc
+
+TOPDIR=../../..
+USE_LIBS=common common/thread common/time common/uuid event io xcodec
+include ${TOPDIR}/common/program.mk

xcodec/example/xcodec-hash-roll1/xcodec-hash-roll1.cc

@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2012 Juli Mallett. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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 <unistd.h>
+
+#include <event/event_callback.h>
+#include <event/event_system.h>
+
+#include <io/stream_handle.h>
+
+#include <xcodec/xcodec.h>
+#include <xcodec/xcodec_hash.h>
+
+class Sink {
+	LogHandle log_;
+
+	StreamHandle fd_;
+	XCodecHash hash_;
+	unsigned length_;
+	Action *action_;
+public:
+	Sink(int fd)
+	: log_("/sink"),
+	  fd_(fd),
+	  hash_(),
+	  length_(0),
+	  action_(NULL)
+	{
+		EventCallback *cb = callback(this, &Sink::read_complete);
+		action_ = fd_.read(0, cb);
+	}
+
+	~Sink()
+	{
+		ASSERT(log_, action_ == NULL);
+	}
+
+	void read_complete(Event e)
+	{
+		action_->cancel();
+		action_ = NULL;
+
+		switch (e.type_) {
+		case Event::Done:
+		case Event::EOS:
+			break;
+		default:
+			HALT(log_) << "Unexpected event: " << e;
+			return;
+		}
+
+		while (!e.buffer_.empty()) {
+			BufferSegment *seg;
+			e.buffer_.moveout(&seg);
+
+			const uint8_t *p, *q = seg->end();
+			if (length_ == XCODEC_SEGMENT_LENGTH) {
+				for (p = seg->data(); p < q; p++) {
+					hash_.roll(*p);
+				}
+			} else {
+				for (p = seg->data(); p < q; p++) {
+					if (length_ == XCODEC_SEGMENT_LENGTH) {
+						hash_.roll(*p);
+					} else {
+						hash_.add(*p);
+						length_++;
+					}
+				}
+			}
+			seg->unref();
+		}
+
+		if (e.type_ == Event::EOS) {
+			fd_.close();
+			return;
+		}
+
+		EventCallback *cb = callback(this, &Sink::read_complete);
+		action_ = fd_.read(0, cb);
+	}
+};
+
+int
+main(void)
+{
+	Sink sink(STDIN_FILENO);
+
+	event_system.run();
+}