#ifndef _PROBE_FINDER_H
  #define _PROBE_FINDER_H
  
  #include <stdbool.h>
  #include "util.h"
  #include "probe-event.h"
  
  #define MAX_PROBE_BUFFER	1024
  #define MAX_PROBES		 128
  #define MAX_PROBE_ARGS		 128
  
  static inline int is_c_varname(const char *name)
  {
  	/* TODO */
  	return isalpha(name[0]) || name[0] == '_';
  }
  
  #ifdef HAVE_DWARF_SUPPORT
  
  #include "dwarf-aux.h"
  
  /* TODO: export debuginfo data structure even if no dwarf support */
  
  /* debug information structure */
  struct debuginfo {
  	Dwarf		*dbg;
  	Dwfl_Module	*mod;
  	Dwfl		*dwfl;
  	Dwarf_Addr	bias;
  };
  
  extern struct debuginfo *debuginfo__new(const char *path);
  extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr);
  extern void debuginfo__delete(struct debuginfo *dbg);
  
  /* Find probe_trace_events specified by perf_probe_event from debuginfo */
  extern int debuginfo__find_trace_events(struct debuginfo *dbg,
  					struct perf_probe_event *pev,
  					struct probe_trace_event **tevs,
  					int max_tevs);
  
  /* Find a perf_probe_point from debuginfo */
  extern int debuginfo__find_probe_point(struct debuginfo *dbg,
  				       unsigned long addr,
  				       struct perf_probe_point *ppt);
  
  /* Find a line range */
  extern int debuginfo__find_line_range(struct debuginfo *dbg,
  				      struct line_range *lr);
  
  /* Find available variables */
  extern int debuginfo__find_available_vars_at(struct debuginfo *dbg,
  					     struct perf_probe_event *pev,
  					     struct variable_list **vls,
  					     int max_points, bool externs);
  
  struct probe_finder {
  	struct perf_probe_event	*pev;		/* Target probe event */
  
  	/* Callback when a probe point is found */
  	int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf);
  
  	/* For function searching */
  	int			lno;		/* Line number */
  	Dwarf_Addr		addr;		/* Address */
  	const char		*fname;		/* Real file name */
  	Dwarf_Die		cu_die;		/* Current CU */
  	Dwarf_Die		sp_die;
  	struct list_head	lcache;		/* Line cache for lazy match */
  
  	/* For variable searching */
  #if _ELFUTILS_PREREQ(0, 142)
  	Dwarf_CFI		*cfi;		/* Call Frame Information */
  #endif
  	Dwarf_Op		*fb_ops;	/* Frame base attribute */
  	struct perf_probe_arg	*pvar;		/* Current target variable */
  	struct probe_trace_arg	*tvar;		/* Current result variable */
  };
  
  struct trace_event_finder {
  	struct probe_finder	pf;
  	Dwfl_Module		*mod;		/* For solving symbols */
  	struct probe_trace_event *tevs;		/* Found trace events */
  	int			ntevs;		/* Number of trace events */
  	int			max_tevs;	/* Max number of trace events */
  };
  
  struct available_var_finder {
  	struct probe_finder	pf;
  	Dwfl_Module		*mod;		/* For solving symbols */
  	struct variable_list	*vls;		/* Found variable lists */
  	int			nvls;		/* Number of variable lists */
  	int			max_vls;	/* Max no. of variable lists */
  	bool			externs;	/* Find external vars too */
  	bool			child;		/* Search child scopes */
  };
  
  struct line_finder {
  	struct line_range	*lr;		/* Target line range */
  
  	const char		*fname;		/* File name */
  	int			lno_s;		/* Start line number */
  	int			lno_e;		/* End line number */
  	Dwarf_Die		cu_die;		/* Current CU */
  	Dwarf_Die		sp_die;
  	int			found;
  };
  
  #endif /* HAVE_DWARF_SUPPORT */
  
  #endif /*_PROBE_FINDER_H */