| 1 | /* gdbmsetopt.c - set options pertaining to a GDBM descriptor. */
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| 2 |
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| 3 | /* This file is part of GDBM, the GNU data base manager, by Philip A. Nelson.
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| 4 | Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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| 5 |
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| 6 | GDBM is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2, or (at your option)
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| 9 | any later version.
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| 10 |
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| 11 | GDBM is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | GNU General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with GDBM; see the file COPYING. If not, write to
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| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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| 19 |
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| 20 | You may contact the original author by:
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| 21 | e-mail: [email protected]
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| 22 | us-mail: Philip A. Nelson
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| 23 | Computer Science Department
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| 24 | Western Washington University
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| 25 | Bellingham, WA 98226
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| 26 |
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| 27 | The author of this file is:
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| 28 | e-mail: [email protected]
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| 29 |
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| 30 | *************************************************************************/
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| 31 |
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| 32 |
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| 33 | /* include system configuration before all else. */
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| 34 | #include "autoconf.h"
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| 35 |
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| 36 | #include "gdbmdefs.h"
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| 37 | #include "gdbmerrno.h"
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| 38 |
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| 39 | /* operate on an already open descriptor. */
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| 40 |
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| 41 | /* ARGSUSED */
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| 42 | int
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| 43 | gdbm_setopt(dbf, optflag, optval, optlen)
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| 44 | gdbm_file_info *dbf; /* descriptor to operate on. */
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| 45 | int optflag; /* option to set. */
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| 46 | int *optval; /* pointer to option value. */
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| 47 | int optlen; /* size of optval. */
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| 48 | {
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| 49 | switch(optflag)
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| 50 | {
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| 51 | case GDBM_CACHESIZE:
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| 52 | /* here, optval will point to the new size of the cache. */
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| 53 | if (dbf->bucket_cache != NULL)
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| 54 | {
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| 55 | gdbm_errno = GDBM_OPT_ALREADY_SET;
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| 56 | return(-1);
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| 57 | }
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| 58 |
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| 59 | return(_gdbm_init_cache(dbf, ((*optval) > 9) ? (*optval) : 10));
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| 60 |
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| 61 | case GDBM_FASTMODE:
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| 62 | /* here, optval will point to either true or false. */
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| 63 | if ((*optval != TRUE) && (*optval != FALSE))
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| 64 | {
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| 65 | gdbm_errno = GDBM_OPT_ILLEGAL;
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| 66 | return(-1);
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| 67 | }
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| 68 |
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| 69 | dbf->fast_write = *optval;
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| 70 | break;
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| 71 |
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| 72 | default:
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| 73 | gdbm_errno = GDBM_OPT_ILLEGAL;
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| 74 | return(-1);
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| 75 | }
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| 76 |
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| 77 | return(0);
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| 78 | }
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