1 files changed, 60 insertions, 0 deletions
diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
new file mode 100644
index 000000000..fc2b5e824
--- /dev/null
+++ b/tools/perf/util/expr.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef PARSE_CTX_H
+#define PARSE_CTX_H 1
+
+// There are fixes that need to land upstream before we can use libbpf's headers,
+// for now use our copy uncoditionally, since the data structures at this point
+// are exactly the same, no problem.
+//#ifdef HAVE_LIBBPF_SUPPORT
+//#include <bpf/hashmap.h>
+//#else
+#include "util/hashmap.h"
+//#endif
+
+struct metric_ref;
+
+struct expr_id {
+	char		*id;
+	struct expr_id	*parent;
+};
+
+struct expr_parse_ctx {
+	struct hashmap	 ids;
+	struct expr_id	*parent;
+};
+
+struct expr_id_data {
+	union {
+		double val;
+		struct {
+			const char *metric_name;
+			const char *metric_expr;
+			bool counted;
+		} ref;
+		struct expr_id	*parent;
+	};
+
+	bool is_ref;
+};
+
+struct expr_scanner_ctx {
+	int start_token;
+	int runtime;
+};
+
+void expr__ctx_init(struct expr_parse_ctx *ctx);
+void expr__ctx_clear(struct expr_parse_ctx *ctx);
+void expr__del_id(struct expr_parse_ctx *ctx, const char *id);
+int expr__add_id(struct expr_parse_ctx *ctx, const char *id);
+int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val);
+int expr__add_ref(struct expr_parse_ctx *ctx, struct metric_ref *ref);
+int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
+		 struct expr_id_data **data);
+int expr__resolve_id(struct expr_parse_ctx *ctx, const char *id,
+		     struct expr_id_data **datap);
+int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
+		const char *expr, int runtime);
+int expr__find_other(const char *expr, const char *one,
+		struct expr_parse_ctx *ids, int runtime);
+
+#endif