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/* gdbmsetopt.c - set options pertaining to a GDBM descriptor. */
/* This file is part of GDBM, the GNU data base manager.
Copyright (C) 1993, 1994, 2007 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. */
/* Include system configuration before all else. */
#include "autoconf.h"
#include "gdbmdefs.h"
/* operate on an already open descriptor. */
/* ARGSUSED */
int
gdbm_setopt(GDBM_FILE dbf, int optflag, int *optval, int optlen)
{
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 || ((*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 || ((*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 || ((*optval != TRUE) && (*optval != FALSE)))
{
gdbm_errno = GDBM_OPT_ILLEGAL;
return -1;
}
dbf->central_free = *optval;
break;
case GDBM_COALESCEBLKS:
/* Optval will point to either true or false. */
if (!optval || ((*optval != TRUE) && (*optval != FALSE)))
{
gdbm_errno = GDBM_OPT_ILLEGAL;
return -1;
}
dbf->coalesce_blocks = *optval;
break;
default:
gdbm_errno = GDBM_OPT_ILLEGAL;
return -1;
}
return 0;
}
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