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// Copyright 2003 John Kasunich
//
// 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
#ifndef PROCFS_MACROS_H
#define PROCFS_MACROS_H
/***********************************************************************
* PROC_FS MACROS *
************************************************************************/
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
/* proc print macros - Contributed by: Erwin Rol (erwin@muffin.org)
and shamelessly ripped from rtai_proc_fs.h, part of the RTAI
project. See http://www.rtai.org for more details.
macro that holds the local variables that
we use in the PROC_PRINT_* macros. We have
this macro so we can add variables with out
changing the users of this macro, of course
only when the names don't colide!
*/
#define PROC_PRINT_VARS \
off_t pos = 0; \
off_t begin = 0; \
int len = 0 /* no ";" */
/* macro that prints in the procfs read buffer.
this macro expects the function arguments to be
named as follows.
static int FOO(char *page, char **start,
off_t off, int count, int *eof, void *data) */
#define PROC_PRINT(fmt,args...) \
len += sprintf(page + len , fmt, ##args); \
pos += len; \
if(pos < off) { \
len = 0; \
begin = pos; \
} \
if(pos > off + count) \
goto done;
/* macro to leave the read function from another
place than at the end. */
#define PROC_PRINT_RETURN \
*eof = 1; \
goto done // no ";"
/* macro that should only used once at the end of the
read function, to return from another place in the
read function use the PROC_PRINT_RETURN macro. */
#define PROC_PRINT_DONE \
*eof = 1; \
done: \
*start = page + (off - begin); \
len -= (off - begin); \
if(len > count) \
len = count; \
if(len < 0) \
len = 0; \
return len // no ";"
#endif /* CONFIG_PROC_FS */
#endif /* PROCFS_MACROS_H */
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