1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef PARSE_CTX_H
3 #define PARSE_CTX_H 1
4 
5 // There are fixes that need to land upstream before we can use libbpf's headers,
6 // for now use our copy uncoditionally, since the data structures at this point
7 // are exactly the same, no problem.
8 //#ifdef HAVE_LIBBPF_SUPPORT
9 //#include <bpf/hashmap.h>
10 //#else
11 #include "util/hashmap.h"
12 //#endif
13 
14 struct metric_ref;
15 
16 struct expr_id {
17 	char		*id;
18 	struct expr_id	*parent;
19 };
20 
21 struct expr_parse_ctx {
22 	struct hashmap	 ids;
23 	struct expr_id	*parent;
24 };
25 
26 struct expr_id_data {
27 	union {
28 		double val;
29 		struct {
30 			const char *metric_name;
31 			const char *metric_expr;
32 			bool counted;
33 		} ref;
34 		struct expr_id	*parent;
35 	};
36 
37 	bool is_ref;
38 };
39 
40 struct expr_scanner_ctx {
41 	int start_token;
42 	int runtime;
43 };
44 
45 void expr__ctx_init(struct expr_parse_ctx *ctx);
46 void expr__ctx_clear(struct expr_parse_ctx *ctx);
47 void expr__del_id(struct expr_parse_ctx *ctx, const char *id);
48 int expr__add_id(struct expr_parse_ctx *ctx, const char *id);
49 int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val);
50 int expr__add_ref(struct expr_parse_ctx *ctx, struct metric_ref *ref);
51 int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
52 		 struct expr_id_data **data);
53 int expr__resolve_id(struct expr_parse_ctx *ctx, const char *id,
54 		     struct expr_id_data **datap);
55 int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
56 		const char *expr, int runtime);
57 int expr__find_other(const char *expr, const char *one,
58 		struct expr_parse_ctx *ids, int runtime);
59 
60 #endif
61