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-rw-r--r--src/TurtleWriter.cpp101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/TurtleWriter.cpp b/src/TurtleWriter.cpp
new file mode 100644
index 00000000..9bceaa06
--- /dev/null
+++ b/src/TurtleWriter.cpp
@@ -0,0 +1,101 @@
+/*
+ This file is part of Ingen.
+ Copyright 2012-2016 David Robillard <http://drobilla.net/>
+
+ Ingen is free software: you can redistribute it and/or modify it under the
+ terms of the GNU Affero General Public License as published by the Free
+ Software Foundation, either version 3 of the License, or any later version.
+
+ Ingen is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU Affero General Public License for details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with Ingen. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ingen/TurtleWriter.hpp"
+#include "ingen/URIMap.hpp"
+
+#define USTR(s) ((const uint8_t*)(s))
+
+namespace ingen {
+
+static size_t
+c_text_sink(const void* buf, size_t len, void* stream)
+{
+ TurtleWriter* writer = (TurtleWriter*)stream;
+ return writer->text_sink(buf, len);
+}
+
+static SerdStatus
+write_prefix(void* handle, const SerdNode* name, const SerdNode* uri)
+{
+ serd_writer_set_prefix((SerdWriter*)handle, name, uri);
+ return SERD_SUCCESS;
+}
+
+TurtleWriter::TurtleWriter(URIMap& map, URIs& uris, const URI& uri)
+ : AtomWriter(map, uris, *this)
+ , _map(map)
+ , _sratom(sratom_new(&map.urid_map_feature()->urid_map))
+ , _uri(uri)
+ , _wrote_prefixes(false)
+{
+ // Use <ingen:/> as base URI, so relative URIs are like bundle paths
+ _base = serd_node_from_string(SERD_URI, (const uint8_t*)"ingen:/");
+ serd_uri_parse(_base.buf, &_base_uri);
+
+ // Set up serialisation environment
+ _env = serd_env_new(&_base);
+ serd_env_set_prefix_from_strings(_env, USTR("atom"), USTR("http://lv2plug.in/ns/ext/atom#"));
+ serd_env_set_prefix_from_strings(_env, USTR("doap"), USTR("http://usefulinc.com/ns/doap#"));
+ serd_env_set_prefix_from_strings(_env, USTR("ingen"), USTR(INGEN_NS));
+ serd_env_set_prefix_from_strings(_env, USTR("lv2"), USTR("http://lv2plug.in/ns/lv2core#"));
+ serd_env_set_prefix_from_strings(_env, USTR("midi"), USTR("http://lv2plug.in/ns/ext/midi#"));
+ serd_env_set_prefix_from_strings(_env, USTR("owl"), USTR("http://www.w3.org/2002/07/owl#"));
+ serd_env_set_prefix_from_strings(_env, USTR("patch"), USTR("http://lv2plug.in/ns/ext/patch#"));
+ serd_env_set_prefix_from_strings(_env, USTR("rdf"), USTR("http://www.w3.org/1999/02/22-rdf-syntax-ns#"));
+ serd_env_set_prefix_from_strings(_env, USTR("rdfs"), USTR("http://www.w3.org/2000/01/rdf-schema#"));
+ serd_env_set_prefix_from_strings(_env, USTR("xsd"), USTR("http://www.w3.org/2001/XMLSchema#"));
+
+ // Make a Turtle writer that writes to text_sink
+ _writer = serd_writer_new(
+ SERD_TURTLE,
+ (SerdStyle)(SERD_STYLE_RESOLVED|SERD_STYLE_ABBREVIATED|SERD_STYLE_CURIED),
+ _env,
+ &_base_uri,
+ c_text_sink,
+ this);
+
+ // Configure sratom to write directly to the writer (and thus text_sink)
+ sratom_set_sink(_sratom,
+ (const char*)_base.buf,
+ (SerdStatementSink)serd_writer_write_statement,
+ (SerdEndSink)serd_writer_end_anon,
+ _writer);
+}
+
+TurtleWriter::~TurtleWriter()
+{
+ sratom_free(_sratom);
+ serd_writer_free(_writer);
+ serd_env_free(_env);
+}
+
+bool
+TurtleWriter::write(const LV2_Atom* msg, int32_t default_id)
+{
+ if (!_wrote_prefixes) {
+ // Write namespace prefixes once to reduce traffic
+ serd_env_foreach(_env, write_prefix, _writer);
+ _wrote_prefixes = true;
+ }
+
+ sratom_write(_sratom, &_map.urid_unmap_feature()->urid_unmap, 0,
+ nullptr, nullptr, msg->type, msg->size, LV2_ATOM_BODY_CONST(msg));
+ serd_writer_finish(_writer);
+ return true;
+}
+
+} // namespace ingen