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-rw-r--r--serd/serd.h48
-rw-r--r--src/statement.c47
-rw-r--r--src/statement.h33
-rw-r--r--wscript1
4 files changed, 129 insertions, 0 deletions
diff --git a/serd/serd.h b/serd/serd.h
index 1e303990..db1ac5db 100644
--- a/serd/serd.h
+++ b/serd/serd.h
@@ -62,6 +62,13 @@ extern "C" {
typedef struct SerdWorldImpl SerdWorld;
/**
+ Statement.
+
+ A subject, predicate, and object, with optional graph context.
+*/
+typedef struct SerdStatementImpl SerdStatement;
+
+/**
Environment.
Represents the state required to resolve a CURIE or relative URI, e.g. the
@@ -1150,6 +1157,47 @@ serd_writer_finish(SerdWriter* writer);
/**
@}
+ @name Statement
+ @{
+*/
+
+/**
+ Return the given node in `statement`.
+*/
+SERD_API
+const SerdNode*
+serd_statement_get_node(const SerdStatement* statement, SerdField field);
+
+/**
+ Return the subject in `statement`.
+*/
+SERD_API
+const SerdNode*
+serd_statement_get_subject(const SerdStatement* statement);
+
+/**
+ Return the predicate in `statement`.
+*/
+SERD_API
+const SerdNode*
+serd_statement_get_predicate(const SerdStatement* statement);
+
+/**
+ Return the object in `statement`.
+*/
+SERD_API
+const SerdNode*
+serd_statement_get_object(const SerdStatement* statement);
+
+/**
+ Return the graph in `statement`.
+*/
+SERD_API
+const SerdNode*
+serd_statement_get_graph(const SerdStatement* statement);
+
+/**
+ @}
@}
*/
diff --git a/src/statement.c b/src/statement.c
new file mode 100644
index 00000000..5e2802eb
--- /dev/null
+++ b/src/statement.c
@@ -0,0 +1,47 @@
+/*
+ Copyright 2011-2018 David Robillard <http://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 "statement.h"
+
+const SerdNode*
+serd_statement_get_node(const SerdStatement* statement, SerdField field)
+{
+ return statement->nodes[field];
+}
+
+const SerdNode*
+serd_statement_get_subject(const SerdStatement* statement)
+{
+ return statement->nodes[SERD_SUBJECT];
+}
+
+const SerdNode*
+serd_statement_get_predicate(const SerdStatement* statement)
+{
+ return statement->nodes[SERD_PREDICATE];
+}
+
+const SerdNode*
+serd_statement_get_object(const SerdStatement* statement)
+{
+ return statement->nodes[SERD_OBJECT];
+}
+
+const SerdNode*
+serd_statement_get_graph(const SerdStatement* statement)
+{
+ return statement->nodes[SERD_GRAPH];
+}
diff --git a/src/statement.h b/src/statement.h
new file mode 100644
index 00000000..7b5d752d
--- /dev/null
+++ b/src/statement.h
@@ -0,0 +1,33 @@
+/*
+ Copyright 2011-2018 David Robillard <http://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.
+*/
+
+#ifndef SERD_STATEMENT_H
+#define SERD_STATEMENT_H
+
+#include "serd/serd.h"
+
+/**
+ Quad of nodes (a statement), or a quad pattern.
+
+ Nodes are ordered (S P O G). The ID of the default graph is 0.
+*/
+typedef const SerdNode* SerdQuad[4];
+
+struct SerdStatementImpl {
+ SerdQuad nodes;
+};
+
+#endif // SERD_STATEMENT_H
diff --git a/wscript b/wscript
index d1c8ba4c..5a9ff9d6 100644
--- a/wscript
+++ b/wscript
@@ -78,6 +78,7 @@ lib_source = ['src/base64.c',
'src/n3.c',
'src/node.c',
'src/reader.c',
+ 'src/statement.c',
'src/string.c',
'src/syntax.c',
'src/system.c',