still partial implementation for complex queries in libsg, and added sg.h which I had forgotten to include in darcs

1 files changed, 57 insertions, 0 deletions

diff --git a/src/runtime/c/sg/sg.h b/src/runtime/c/sg/sg.h
new file mode 100644
index 000000000..a859bbec2
--- /dev/null
+++ b/src/runtime/c/sg/sg.h
@@ -0,0 +1,57 @@
+#ifndef SG_SG_H_
+#define SG_SG_H_
+
+typedef long long int SgId;
+
+#include <gu/exn.h>
+#include <pgf/pgf.h>
+
+typedef struct SgSG SgSG;
+
+SgSG*
+sg_open(const char *filename, GuExn* err);
+
+void
+sg_close(SgSG *sg, GuExn* err);
+
+SgId
+sg_insert_expr(SgSG *sg, PgfExpr expr, GuExn* err);
+
+PgfExpr
+sg_select_expr(SgSG *sg, SgId key, GuPool* out_pool, GuExn* err);
+
+
+typedef SgId SgTriple[3];
+
+SgId
+sg_insert_triple(SgSG *sg, SgTriple triple, GuExn* err);
+
+bool
+sg_select_triple(SgSG *sg, SgId key, SgTriple triple, GuExn* err);
+
+typedef struct SgTripleResult SgTripleResult;
+
+SgTripleResult*
+sg_query_triple(SgSG *sg, SgTriple triple, GuExn* err);
+
+bool
+sg_triple_result_fetch(SgTripleResult* tres, SgId* pKey, SgTriple triple, GuExn* err);
+
+void
+sg_triple_result_close(SgTripleResult* tres, GuExn* err);
+
+typedef int SgPattern[3];
+
+typedef struct {
+	SgId* sel;
+	SgId* vars;
+	size_t n_patterns;
+	SgPattern patterns[];
+} SgQuery;
+
+typedef struct SgQueryResult SgQueryResult;
+
+SgQueryResult*
+sg_query(SgSG *sg, SgQuery* query, GuExn* err);
+
+#endif