From 2402d960c54981abb34a79982ecd61a00f798901 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 3 Jun 2018 22:23:28 +0200
Subject: Add cursor to statement

This allows the file and position of statements to be used in sinks, for
example for more helpful error reporting outside the parser.
---
 serd/serd.h     | 7 +++++++
 src/reader.c    | 3 ++-
 src/sink.c      | 3 ++-
 src/statement.c | 6 ++++++
 src/statement.h | 3 ++-
 5 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/serd/serd.h b/serd/serd.h
index cc09b158..9e1c651e 100644
--- a/serd/serd.h
+++ b/serd/serd.h
@@ -1267,6 +1267,13 @@ SERD_API
 const SerdNode*
 serd_statement_get_graph(const SerdStatement* statement);
 
+/**
+   Return the source location where `statement` originated, or NULL.
+*/
+SERD_API
+const SerdCursor*
+serd_statement_get_cursor(const SerdStatement* statement);
+
 /**
    @}
    @name Cursor
diff --git a/src/reader.c b/src/reader.c
index 79e2315e..fb06bdc3 100644
--- a/src/reader.c
+++ b/src/reader.c
@@ -126,7 +126,8 @@ emit_statement(SerdReader* reader, ReadContext ctx, SerdNode* o)
 	serd_node_zero_pad(o);
 
 	const SerdStatement statement = {
-		{ ctx.subject, ctx.predicate, o, graph }
+		{ ctx.subject, ctx.predicate, o, graph },
+		&reader->source.cur
 	};
 
 	const SerdStatus st = reader->sink->statement(
diff --git a/src/sink.c b/src/sink.c
index 1c5c500f..fffa386e 100644
--- a/src/sink.c
+++ b/src/sink.c
@@ -48,7 +48,8 @@ serd_sink_write(const SerdSink*          sink,
                 const SerdNode*          object,
                 const SerdNode*          graph)
 {
-	const SerdStatement statement = { { subject, predicate, object, graph } };
+	const SerdStatement statement = { { subject, predicate, object, graph },
+		                              NULL };
 	return sink->statement(sink->handle, flags, &statement);
 }
 
diff --git a/src/statement.c b/src/statement.c
index 5e2802eb..24440a38 100644
--- a/src/statement.c
+++ b/src/statement.c
@@ -45,3 +45,9 @@ serd_statement_get_graph(const SerdStatement* statement)
 {
 	return statement->nodes[SERD_GRAPH];
 }
+
+const SerdCursor*
+serd_statement_get_cursor(const SerdStatement* statement)
+{
+	return statement->cursor;
+}
diff --git a/src/statement.h b/src/statement.h
index 7b5d752d..7c8384e9 100644
--- a/src/statement.h
+++ b/src/statement.h
@@ -27,7 +27,8 @@
 typedef const SerdNode* SerdQuad[4];
 
 struct SerdStatementImpl {
-	SerdQuad nodes;
+	SerdQuad    nodes;
+	SerdCursor* cursor;
 };
 
 #endif  // SERD_STATEMENT_H
-- 
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