| 1 | /* fetch.c - Find a key and return the associated data. */
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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) 1990, 1991, 1993 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 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 | *************************************************************************/
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| 28 |
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| 29 |
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| 30 | /* include system configuration before all else. */
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| 31 | #include "autoconf.h"
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| 32 |
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| 33 | #include "gdbmdefs.h"
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| 34 | #include "extern.h"
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| 35 |
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| 36 |
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| 37 | /* Look up a given KEY and return the information associated with that KEY.
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| 38 | The pointer in the structure that is returned is a pointer to dynamically
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| 39 | allocated memory block. This DBM interface uses the NDBM interface. */
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| 40 |
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| 41 | datum
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| 42 | fetch (key)
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| 43 | datum key;
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| 44 | {
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| 45 | datum ret_val; /* The return value. */
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| 46 |
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| 47 | /* Free previous dynamic memory, do actual call, and save pointer to new
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| 48 | memory. */
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| 49 | ret_val = gdbm_fetch (_gdbm_file, key);
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| 50 | if (_gdbm_fetch_val != NULL) free (_gdbm_fetch_val);
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| 51 | _gdbm_fetch_val = ret_val.dptr;
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| 52 |
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| 53 | /* Return the new value. */
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| 54 | return ret_val;
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| 55 |
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| 56 | }
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