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-rw-r--r--src/sink.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/src/sink.c b/src/sink.c
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+++ b/src/sink.c
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+/*
+ Copyright 2011 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.
+*/
+
+#define _POSIX_C_SOURCE 201112L /* for posix_memalign */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "serd_internal.h"
+#include "serd-config.h"
+
+#ifndef MIN
+# define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
+
+struct SerdBulkSinkImpl {
+ SerdSink sink;
+ void* stream;
+ uint8_t* buf;
+ size_t size;
+ size_t block_size;
+};
+
+SERD_API
+SerdBulkSink*
+serd_bulk_sink_new(SerdSink sink, void* stream, size_t block_size)
+{
+ SerdBulkSink* bsink = (SerdBulkSink*)malloc(sizeof(SerdBulkSink));
+ bsink->sink = sink;
+ bsink->stream = stream;
+ bsink->size = 0;
+ bsink->block_size = block_size;
+#ifdef HAVE_POSIX_MEMALIGN
+ posix_memalign((void**)&bsink->buf, block_size, block_size);
+#else
+ bsink->buf = (uint8_t*)malloc(block_size);
+#endif
+ return bsink;
+}
+
+SERD_API
+void
+serd_bulk_sink_free(SerdBulkSink* bsink)
+{
+ if (bsink) {
+ // Flush any remaining output
+ if (bsink->size > 0) {
+ bsink->sink(bsink->buf, bsink->size, bsink->stream);
+ }
+ free(bsink->buf);
+ free(bsink);
+ }
+}
+
+SERD_API
+size_t
+serd_bulk_sink_write(const void* buf, size_t len, SerdBulkSink* bsink)
+{
+ const size_t orig_len = len;
+ while (len > 0) {
+ 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 = (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;
+}