add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/perf/util/expr.h
..
..
@@ -2,25 +2,59 @@
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 #ifndef PARSE_CTX_H
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 #define PARSE_CTX_H 1
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-#define EXPR_MAX_OTHER 15
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-#define MAX_PARSE_ID EXPR_MAX_OTHER
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+// There are fixes that need to land upstream before we can use libbpf's headers,
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+// for now use our copy uncoditionally, since the data structures at this point
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+// are exactly the same, no problem.
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+//#ifdef HAVE_LIBBPF_SUPPORT
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+//#include <bpf/hashmap.h>
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+//#else
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+#include "util/hashmap.h"
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+//#endif
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-struct parse_id {
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-	const char *name;
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-	double val;
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+struct metric_ref;
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+
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+struct expr_id {
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+	char		*id;
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+	struct expr_id	*parent;
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 };
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-struct parse_ctx {
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-	int num_ids;
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-	struct parse_id ids[MAX_PARSE_ID];
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+struct expr_parse_ctx {
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+	struct hashmap	 ids;
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+	struct expr_id	*parent;
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 };
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-void expr__ctx_init(struct parse_ctx *ctx);
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-void expr__add_id(struct parse_ctx *ctx, const char *id, double val);
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-#ifndef IN_EXPR_Y
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-int expr__parse(double *final_val, struct parse_ctx *ctx, const char **pp);
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-#endif
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-int expr__find_other(const char *p, const char *one, const char ***other,
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-		int *num_other);
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+struct expr_id_data {
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+	union {
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+		double val;
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+		struct {
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+			const char *metric_name;
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+			const char *metric_expr;
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+			bool counted;
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+		} ref;
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+		struct expr_id	*parent;
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+	};
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+
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+	bool is_ref;
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+};
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+
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+struct expr_scanner_ctx {
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+	int start_token;
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+	int runtime;
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+};
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+
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+void expr__ctx_init(struct expr_parse_ctx *ctx);
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+void expr__ctx_clear(struct expr_parse_ctx *ctx);
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+void expr__del_id(struct expr_parse_ctx *ctx, const char *id);
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+int expr__add_id(struct expr_parse_ctx *ctx, const char *id);
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+int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val);
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+int expr__add_ref(struct expr_parse_ctx *ctx, struct metric_ref *ref);
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+int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
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+		 struct expr_id_data **data);
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+int expr__resolve_id(struct expr_parse_ctx *ctx, const char *id,
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+		     struct expr_id_data **datap);
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+int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
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+		const char *expr, int runtime);
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+int expr__find_other(const char *expr, const char *one,
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+		struct expr_parse_ctx *ids, int runtime);
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 #endif