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/* message.h - declaration for verbosity sensitive feedback function
Copyright 1998-2017 Free Software Foundation, Inc.
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 3, 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., 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
#ifndef MESSAGE_H_
# define MESSAGE_H_
/* The bigger, the more verbose. Should be set by application
(default is 0, set to -1 for to messages) */
extern unsigned int msg_verbosity;
/* Decode ARG which is the verbosity level wanted: either an integer
specifying directly the bits, or using a comma separated list of
token which are ARGMATCHed. */
unsigned msg_verbosity_argmatch (const char *option, char *arg);
/* Return non null value if message at LVL should be displayed. */
# define msg_test(lvl) ((lvl) & msg_verbosity)
/* fprintf (TEXT) at verbosity LEVEL. */
# define message(level,text) \
do { \
if (msg_test (level)) \
fprintf text; \
} while (0)
/* Include the definition of the verbosity levels. This is
application dependant. */
# include "msg.h"
#endif /* not MESSAGE_H_ */
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