Clean up and separate internal headers

1 files changed, 96 insertions, 0 deletions

diff --git a/src/byte_sink.h b/src/byte_sink.h
new file mode 100644
index 00000000..f39bc2ba
--- /dev/null
+++ b/src/byte_sink.h
@@ -0,0 +1,96 @@
+/*
+  Copyright 2011-2020 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef SERD_BYTE_SINK_H
+#define SERD_BYTE_SINK_H
+
+#include "serd_internal.h"
+#include "system.h"
+
+#include "serd/serd.h"
+
+#include <stddef.h>
+#include <string.h>
+
+typedef struct SerdByteSinkImpl {
+	SerdSink sink;
+	void*    stream;
+	uint8_t* buf;
+	size_t   size;
+	size_t   block_size;
+} SerdByteSink;
+
+static inline SerdByteSink
+serd_byte_sink_new(SerdSink sink, void* stream, size_t block_size)
+{
+	SerdByteSink bsink;
+	bsink.sink       = sink;
+	bsink.stream     = stream;
+	bsink.size       = 0;
+	bsink.block_size = block_size;
+	bsink.buf        = ((block_size > 1)
+	                    ? (uint8_t*)serd_bufalloc(block_size)
+	                    : NULL);
+	return bsink;
+}
+
+static inline void
+serd_byte_sink_flush(SerdByteSink* bsink)
+{
+	if (bsink->block_size > 1 && bsink->size > 0) {
+		bsink->sink(bsink->buf, bsink->size, bsink->stream);
+		bsink->size = 0;
+	}
+}
+
+static inline void
+serd_byte_sink_free(SerdByteSink* bsink)
+{
+	serd_byte_sink_flush(bsink);
+	free(bsink->buf);
+	bsink->buf = NULL;
+}
+
+static inline size_t
+serd_byte_sink_write(const void* buf, size_t len, SerdByteSink* bsink)
+{
+	if (len == 0) {
+		return 0;
+	} else if (bsink->block_size == 1) {
+		return bsink->sink(buf, len, bsink->stream);
+	}
+
+	const size_t orig_len = len;
+	while (len) {
+		const size_t space = bsink->block_size - bsink->size;
+		const size_t n     = MIN(space, len);
+
+		// Write as much as possible into the remaining buffer space
+		memcpy(bsink->buf + bsink->size, buf, n);
+		bsink->size += n;
+		buf          = (const uint8_t*)buf + n;
+		len         -= n;
+
+		// Flush page if buffer is full
+		if (bsink->size == bsink->block_size) {
+			bsink->sink(bsink->buf, bsink->block_size, bsink->stream);
+			bsink->size = 0;
+		}
+	}
+	return orig_len;
+}
+
+#endif  // SERD_BYTE_SINK_H