Cache commonly used nodes in the world

3 files changed, 32 insertions, 14 deletions

diff --git a/src/world.c b/src/world.c
index d43a2909..21bce2f3 100644
--- a/src/world.c
+++ b/src/world.c
@@ -21,6 +21,7 @@
 #include "cursor.h"
 #include "node.h"
 #include "serd_config.h"
+#include "serd_internal.h"
 
 #include <errno.h>
 #include <stdarg.h>
@@ -83,8 +84,18 @@ SerdWorld*
 serd_world_new(void)
 {
 	SerdWorld* world = (SerdWorld*)calloc(1, sizeof(SerdWorld));
+	SerdNodes* nodes = serd_nodes_new();
+
+	world->rdf_first   = serd_nodes_manage(nodes, serd_new_uri(NS_RDF "first"));
+	world->rdf_nil     = serd_nodes_manage(nodes, serd_new_uri(NS_RDF "nil"));
+	world->rdf_rest    = serd_nodes_manage(nodes, serd_new_uri(NS_RDF "rest"));
+	world->rdf_type    = serd_nodes_manage(nodes, serd_new_uri(NS_RDF "type"));
+	world->xsd_boolean = serd_nodes_manage(nodes, serd_new_uri(NS_XSD "boolean"));
+	world->xsd_decimal = serd_nodes_manage(nodes, serd_new_uri(NS_XSD "decimal"));
+	world->xsd_integer = serd_nodes_manage(nodes, serd_new_uri(NS_XSD "integer"));
 
 	world->blank_node = serd_new_blank("b0000000000");
+	world->nodes      = nodes;
 
 	return world;
 }
@@ -93,6 +104,7 @@ void
 serd_world_free(SerdWorld* world)
 {
 	serd_node_free(world->blank_node);
+	serd_nodes_free(world->nodes);
 	free(world);
 }
 
diff --git a/src/world.h b/src/world.h
index 201d038f..9ac13a95 100644
--- a/src/world.h
+++ b/src/world.h
@@ -23,10 +23,18 @@
 #include <stdio.h>
 
 struct SerdWorldImpl {
-	SerdErrorSink error_sink;
-	void*         error_handle;
-	uint32_t      next_blank_id;
-	SerdNode*     blank_node;
+	SerdNodes*      nodes;
+	SerdErrorSink   error_sink;
+	void*           error_handle;
+	uint32_t        next_blank_id;
+	SerdNode*       blank_node;
+	const SerdNode* rdf_first;
+	const SerdNode* rdf_nil;
+	const SerdNode* rdf_rest;
+	const SerdNode* rdf_type;
+	const SerdNode* xsd_boolean;
+	const SerdNode* xsd_decimal;
+	const SerdNode* xsd_integer;
 };
 
 FILE* serd_world_fopen(SerdWorld* world, const char* path, const char* mode);
diff --git a/src/writer.c b/src/writer.c
index 48167cc7..13f439fd 100644
--- a/src/writer.c
+++ b/src/writer.c
@@ -16,7 +16,6 @@
 
 #include "env.h"
 #include "node.h"
-#include "serd_internal.h"
 #include "sink.h"
 #include "stack.h"
 #include "string_utils.h"
@@ -441,13 +440,11 @@ write_literal(SerdWriter*        writer,
 	const char*     node_str = serd_node_get_string(node);
 	const char*     type_uri = serd_node_get_string(datatype);
 	if (supports_abbrev(writer) && type_uri) {
-		if (!strncmp(type_uri, NS_XSD, sizeof(NS_XSD) - 1) && (
-			    !strcmp(type_uri + sizeof(NS_XSD) - 1, "boolean") ||
-			    !strcmp(type_uri + sizeof(NS_XSD) - 1, "integer"))) {
+		if (serd_node_equals(datatype, writer->world->xsd_boolean) ||
+		    serd_node_equals(datatype, writer->world->xsd_integer)) {
 			sink(node_str, node->n_bytes, writer);
 			return true;
-		} else if (!strncmp(type_uri, NS_XSD, sizeof(NS_XSD) - 1) &&
-		           !strcmp(type_uri + sizeof(NS_XSD) - 1, "decimal") &&
+		} else if (serd_node_equals(datatype, writer->world->xsd_decimal) &&
 		           strchr(node_str, '.') &&
 		           node_str[node->n_bytes - 1] != '.') {
 			/* xsd:decimal literals without trailing digits, e.g. "5.", can
@@ -510,9 +507,10 @@ write_uri_node(SerdWriter* const        writer,
 	const char* node_str   = serd_node_get_string(node);
 	const bool  has_scheme = serd_uri_string_has_scheme(node_str);
 	if (field == SERD_PREDICATE && supports_abbrev(writer)
-	    && !strcmp(node_str, NS_RDF "type")) {
+	    && serd_node_equals(node, writer->world->rdf_type)) {
 		return sink("a", 1, writer) == 1;
-	} else if (supports_abbrev(writer) && !strcmp(node_str, NS_RDF "nil")) {
+	} else if (supports_abbrev(writer) &&
+	           serd_node_equals(node, writer->world->rdf_nil)) {
 		return sink("()", 2, writer) == 2;
 	} else if (has_scheme && supports_abbrev(writer) &&
 	           serd_env_qualify_in_place(writer->env, node, &prefix, &suffix) &&
@@ -678,11 +676,11 @@ write_list_obj(SerdWriter*        writer,
                const SerdNode*    predicate,
                const SerdNode*    object)
 {
-	if (!strcmp(serd_node_get_string(object), NS_RDF "nil")) {
+	if (serd_node_equals(object, writer->world->rdf_nil)) {
 		--writer->indent;
 		write_sep(writer, SEP_LIST_END);
 		return true;
-	} else if (!strcmp(serd_node_get_string(predicate), NS_RDF "first")) {
+	} else if (serd_node_equals(predicate, writer->world->rdf_first)) {
 		write_sep(writer, SEP_LIST_SEP);
 		write_node(writer, object, SERD_OBJECT, flags);
 	}