Add stream.

src/stream.c

@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2012, Jonathan Schleifer <js@webkeks.org>
+ * 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 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 "stream.h"
+
+static bool
+ctor(void *ptr, va_list args)
+{
+	CFWStream *stream = ptr;
+
+	stream->ops = NULL;
+
+	return true;
+}
+
+static void
+dtor(void *ptr)
+{
+	cfw_stream_close(ptr);
+}
+
+ssize_t
+cfw_stream_read(void *ptr, void *buf, size_t len)
+{
+	CFWStream *stream = ptr;
+
+	if (stream == NULL || stream->ops == NULL)
+		return -1;
+
+	return stream->ops->read(stream, buf, len);
+}
+
+bool
+cfw_stream_write(void *ptr, const void *buf, size_t len)
+{
+	CFWStream *stream = ptr;
+
+	if (stream == NULL || stream->ops == NULL)
+		return false;
+
+	return stream->ops->write(stream, buf, len);
+}
+
+bool
+cfw_stream_eof(void *ptr)
+{
+	CFWStream *stream = ptr;
+
+	if (stream == NULL || stream->ops == NULL)
+		return true;
+
+	return stream->ops->eof(stream);
+}
+
+void
+cfw_stream_close(void *ptr)
+{
+	CFWStream *stream = ptr;
+
+	if (stream == NULL || stream->ops == NULL)
+		return;
+
+	stream->ops->close(stream);
+}
+
+static CFWClass class = {
+	.name = "CFWStream",
+	.size = sizeof(CFWStream),
+	.ctor = ctor,
+	.dtor = dtor
+};
+CFWClass *cfw_stream = &class;