WIP: Add serd_node_from_syntax() and serd_node_to_syntax()

5 files changed, 127 insertions, 0 deletions

diff --git a/src/node_syntax.c b/src/node_syntax.c
new file mode 100644
index 00000000..88d360dd
--- /dev/null
+++ b/src/node_syntax.c
@@ -0,0 +1,96 @@
+/*
+  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;
+}
diff --git a/src/world.c b/src/world.c
index 0e8df944..d166b1d3 100644
--- a/src/world.c
+++ b/src/world.c
@@ -73,6 +73,7 @@ serd_world_new(void)
   const SerdStringView xsd_boolean = SERD_STATIC_STRING(NS_XSD "boolean");
   const SerdStringView xsd_decimal = SERD_STATIC_STRING(NS_XSD "decimal");
   const SerdStringView xsd_integer = SERD_STATIC_STRING(NS_XSD "integer");
+  const SerdStringView xsd_long    = SERD_STATIC_STRING(NS_XSD "long");
 
   world->rdf_first   = serd_nodes_manage(nodes, serd_new_uri(rdf_first));
   world->rdf_nil     = serd_nodes_manage(nodes, serd_new_uri(rdf_nil));
@@ -81,6 +82,7 @@ serd_world_new(void)
   world->xsd_boolean = serd_nodes_manage(nodes, serd_new_uri(xsd_boolean));
   world->xsd_decimal = serd_nodes_manage(nodes, serd_new_uri(xsd_decimal));
   world->xsd_integer = serd_nodes_manage(nodes, serd_new_uri(xsd_integer));
+  world->xsd_long    = serd_nodes_manage(nodes, serd_new_uri(xsd_long));
   world->blank_node  = serd_new_blank(SERD_STATIC_STRING("b00000000000"));
   world->nodes       = nodes;
 
diff --git a/src/world.h b/src/world.h
index 4f4101e4..f76b9483 100644
--- a/src/world.h
+++ b/src/world.h
@@ -34,6 +34,7 @@ struct SerdWorldImpl {
   const SerdNode* xsd_boolean;
   const SerdNode* xsd_decimal;
   const SerdNode* xsd_integer;
+  const SerdNode* xsd_long;
   uint32_t        next_blank_id;
 };
 
diff --git a/src/writer.c b/src/writer.c
index fbc9dd5d..c520638e 100644
--- a/src/writer.c
+++ b/src/writer.c
@@ -14,6 +14,8 @@
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
+#include "writer.h"
+
 #include "byte_sink.h"
 #include "env.h"
 #include "node.h"
@@ -1149,6 +1151,12 @@ serd_writer_on_event(SerdWriter* writer, const SerdEvent* event)
 }
 
 SerdStatus
+serd_writer_write_node(SerdWriter* writer, const SerdNode* node)
+{
+  return write_node(writer, node, SERD_OBJECT, 0);
+}
+
+SerdStatus
 serd_writer_finish(SerdWriter* writer)
 {
   SerdStatus st = SERD_SUCCESS;
diff --git a/src/writer.h b/src/writer.h
new file mode 100644
index 00000000..c80fe49c
--- /dev/null
+++ b/src/writer.h
@@ -0,0 +1,20 @@
+/*
+  Copyright 2019-2020 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 "serd/serd.h"
+
+SerdStatus
+serd_writer_write_node(SerdWriter* writer, const SerdNode* node);