filter.h

这个是LINUX下的GDB调度工具的源码

/* The IGEN simulator generator for GDB, the GNU Debugger.

   Copyright 2002 Free Software Foundation, Inc.

   Contributed by Andrew Cagney.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */


/* NB, an empty filter is NULL */
typedef struct _filter filter;


/* parse the list merging any flags into the filter */

extern void filter_parse (filter **filters, const char *filt);


/* add the second filter to the first */

extern void filter_add (filter **filters, filter *add);



/* returns true if SUB is a strict subset of SUPER.  For an empty set
   is a member of any set */

extern int filter_is_subset (filter *superset, filter *subset);


/* return true if there is at least one member common to the two
   filters */

extern int filter_is_common (filter *l, filter *r);


/* returns the index (pos + 1) if the name is in the filter.  */

extern int filter_is_member (filter *set, const char *flag);


/* returns true if one of the flags is not present in the filter.
   === !filter_is_subset (filter_parse (NULL, flags), filters) */
int is_filtered_out (filter *filters, const char *flags);


/* returns the next member of the filter set that follows MEMBER.
   Member does not need to be an elememt of the filter set.  Next of
   "" is the first non-empty member */
char *filter_next (filter *set, char *member);



/* for debugging */

extern void dump_filter (lf *file, char *prefix, filter *filt, char *suffix);