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/* gdbmsetopt.c - set options pertaining to a GDBM descriptor. */
/* This file is part of GDBM, the GNU data base manager, by Philip A. Nelson.
Copyright (C) 1993, 1994 Free Software Foundation, Inc.
GDBM 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, or (at your option)
any later version.
GDBM 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 GDBM; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
You may contact the original author by:
e-mail: phil@cs.wwu.edu
us-mail: Philip A. Nelson
Computer Science Department
Western Washington University
Bellingham, WA 98226
The author of this file is:
e-mail: downsj@downsj.com
*************************************************************************/
/* include system configuration before all else. */
#include "autoconf.h"
#include "gdbmdefs.h"
#include "gdbmerrno.h"
/* operate on an already open descriptor. */
/* ARGSUSED */
int
gdbm_setopt(dbf, optflag, optval, optlen)
gdbm_file_info *dbf; /* descriptor to operate on. */
int optflag; /* option to set. */
int *optval; /* pointer to option value. */
int optlen; /* size of optval. */
{
switch(optflag)
{
case GDBM_CACHESIZE:
/* Optval will point to the new size of the cache. */
if (dbf->bucket_cache != NULL)
{
gdbm_errno = GDBM_OPT_ALREADY_SET;
return(-1);
}
return(_gdbm_init_cache(dbf, ((*optval) > 9) ? (*optval) : 10));
case GDBM_FASTMODE:
/* Obsolete form of SYNCMODE. */
if ((*optval != TRUE) && (*optval != FALSE))
{
gdbm_errno = GDBM_OPT_ILLEGAL;
return(-1);
}
dbf->fast_write = *optval;
break;
case GDBM_SYNCMODE:
/* Optval will point to either true or false. */
if ((*optval != TRUE) && (*optval != FALSE))
{
gdbm_errno = GDBM_OPT_ILLEGAL;
return(-1);
}
dbf->fast_write = !(*optval);
break;
case GDBM_CENTFREE:
/* Optval will point to either true or false. */
if ((*optval != TRUE) && (*optval != FALSE))
{
gdbm_errno = GDBM_OPT_ILLEGAL;
return(-1);
}
dbf->fast_write = *optval;
break;
case GDBM_COALESCEBLKS:
/* Optval will point to either true or false. */
if ((*optval != TRUE) && (*optval != FALSE))
{
gdbm_errno = GDBM_OPT_ILLEGAL;
return(-1);
}
dbf->fast_write = *optval;
break;
default:
gdbm_errno = GDBM_OPT_ILLEGAL;
return(-1);
}
return(0);
}
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