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-rw-r--r--src/node_syntax.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/src/node_syntax.c b/src/node_syntax.c
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+++ b/src/node_syntax.c
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+/*
+ Copyright 2011-2020 David Robillard <d@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.
+*/
+
+#include "writer.h"
+
+#include "serd/serd.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static SerdStatus
+quiet_error_func(void* const handle, const SerdError* const e)
+{
+ (void)handle;
+ (void)e;
+ return SERD_SUCCESS;
+}
+
+static SerdStatus
+on_node_string_event(void* const handle, const SerdEvent* const event)
+{
+ if (event->type == SERD_STATEMENT) {
+ *(SerdNode**)handle =
+ serd_node_copy(serd_statement_object(event->statement.statement));
+ }
+
+ return SERD_SUCCESS;
+}
+
+SerdNode*
+serd_node_from_syntax(const char* const str, const SerdSyntax syntax)
+{
+ static const char* const prelude =
+ "_:s <http://www.w3.org/2000/01/rdf-schema#object>";
+
+ const size_t str_len = strlen(str);
+ const size_t doc_len = strlen(prelude) + str_len + 4;
+ char* const doc = (char*)calloc(doc_len + 1, 1);
+
+ snprintf(doc, doc_len + 1, "%s %s .", prelude, str);
+
+ SerdNode* object = NULL;
+ SerdWorld* const world = serd_world_new();
+ SerdSink* const sink = serd_sink_new(&object, on_node_string_event, NULL);
+
+ SerdByteSource* const source = serd_byte_source_new_string(doc, NULL);
+ SerdReader* const reader = serd_reader_new(
+ world, syntax, SERD_READ_EXACT_BLANKS, sink, 1024 + doc_len);
+
+ serd_world_set_error_func(world, quiet_error_func, NULL);
+ serd_reader_start(reader, source);
+ serd_reader_read_document(reader);
+ serd_reader_finish(reader);
+ serd_byte_source_free(source);
+ serd_reader_free(reader);
+ serd_sink_free(sink);
+ serd_world_free(world);
+ free(doc);
+
+ return object;
+}
+
+char*
+serd_node_to_syntax(const SerdNode* const node, const SerdSyntax syntax)
+{
+ SerdWorld* const world = serd_world_new();
+ SerdEnv* const env = serd_env_new(SERD_EMPTY_STRING());
+ SerdBuffer buffer = {NULL, 0};
+ SerdByteSink* const out = serd_byte_sink_new_buffer(&buffer);
+ SerdWriter* const writer = serd_writer_new(world, syntax, 0, env, out);
+
+ serd_world_set_error_func(world, quiet_error_func, NULL);
+
+ SerdStatus st = SERD_SUCCESS;
+ char* result = NULL;
+ if (!(st = serd_writer_write_node(writer, node)) &&
+ !(st = serd_writer_finish(writer))) {
+ result = serd_buffer_sink_finish(&buffer);
+ }
+
+ return result;
+}