Add model

1 files changed, 77 insertions, 0 deletions

diff --git a/src/statement.c b/src/statement.c
index 24440a38..f0b09247 100644
--- a/src/statement.c
+++ b/src/statement.c
@@ -16,6 +16,54 @@
 
 #include "statement.h"
 
+#include "cursor.h"
+#include "node.h"
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+SerdStatement*
+serd_statement_new(const SerdNode*   s,
+                   const SerdNode*   p,
+                   const SerdNode*   o,
+                   const SerdNode*   g,
+                   const SerdCursor* cursor)
+{
+	SerdStatement* statement = (SerdStatement*)malloc(sizeof(SerdStatement));
+	if (statement) {
+		statement->nodes[0] = s;
+		statement->nodes[1] = p;
+		statement->nodes[2] = o;
+		statement->nodes[3] = g;
+		statement->cursor   = serd_cursor_copy(cursor);
+	}
+	return statement;
+}
+
+SerdStatement*
+serd_statement_copy(const SerdStatement* statement)
+{
+	if (!statement) {
+		return NULL;
+	}
+
+	SerdStatement* copy = (SerdStatement*)malloc(sizeof(SerdStatement));
+	memcpy(copy, statement, sizeof(SerdStatement));
+	if (statement->cursor) {
+		copy->cursor = (SerdCursor*)malloc(sizeof(SerdCursor));
+		memcpy(copy->cursor, statement->cursor, sizeof(SerdCursor));
+	}
+	return copy;
+}
+
+void
+serd_statement_free(SerdStatement* statement)
+{
+	free(statement->cursor);
+	free(statement);
+}
+
 const SerdNode*
 serd_statement_get_node(const SerdStatement* statement, SerdField field)
 {
@@ -51,3 +99,32 @@ serd_statement_get_cursor(const SerdStatement* statement)
 {
 	return statement->cursor;
 }
+
+bool
+serd_statement_equals(const SerdStatement* a, const SerdStatement* b)
+{
+	return (a == b || (a && b && serd_node_equals(a->nodes[0], b->nodes[0]) &&
+	                   serd_node_equals(a->nodes[1], b->nodes[1]) &&
+	                   serd_node_equals(a->nodes[2], b->nodes[2]) &&
+	                   serd_node_equals(a->nodes[3], b->nodes[3])));
+}
+
+bool
+serd_statement_matches(const SerdStatement* statement,
+                       const SerdNode*      subject,
+                       const SerdNode*      predicate,
+                       const SerdNode*      object,
+                       const SerdNode*      graph)
+{
+	return (serd_node_pattern_match(statement->nodes[0], subject) &&
+	        serd_node_pattern_match(statement->nodes[1], predicate) &&
+	        serd_node_pattern_match(statement->nodes[2], object) &&
+	        serd_node_pattern_match(statement->nodes[3], graph));
+}
+
+bool
+serd_statement_matches_quad(const SerdStatement* statement, const SerdQuad quad)
+{
+	return serd_statement_matches(
+		statement, quad[0], quad[1], quad[2], quad[3]);
+}