1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 /*static char sccsid[] = "from: @(#)rec_utils.c 8.1 (Berkeley) 6/4/93";*/ 36 static char rcsid[] = "$Id: rec_utils.c,v 1.2 1993/08/01 18:43:09 mycroft Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <sys/param.h> 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include <db.h> 46 #include "recno.h" 47 48 /* 49 * __REC_RET -- Build return data as a result of search or scan. 50 * 51 * Parameters: 52 * t: tree 53 * d: LEAF to be returned to the user. 54 * data: user's data structure 55 * 56 * Returns: 57 * RET_SUCCESS, RET_ERROR. 58 */ 59 int 60 __rec_ret(t, e, nrec, key, data) 61 BTREE *t; 62 EPG *e; 63 recno_t nrec; 64 DBT *key, *data; 65 { 66 register RLEAF *rl; 67 register void *p; 68 69 if (data == NULL) 70 goto retkey; 71 72 rl = GETRLEAF(e->page, e->index); 73 74 if (rl->flags & P_BIGDATA) { 75 if (__ovfl_get(t, rl->bytes, 76 &data->size, &t->bt_dbuf, &t->bt_dbufsz)) 77 return (RET_ERROR); 78 } else { 79 /* Use +1 in case the first record retrieved is 0 length. */ 80 if (rl->dsize + 1 > t->bt_dbufsz) { 81 if ((p = realloc(t->bt_dbuf, rl->dsize + 1)) == NULL) 82 return (RET_ERROR); 83 t->bt_dbuf = p; 84 t->bt_dbufsz = rl->dsize + 1; 85 } 86 memmove(t->bt_dbuf, rl->bytes, rl->dsize); 87 data->size = rl->dsize; 88 } 89 data->data = t->bt_dbuf; 90 91 retkey: if (key == NULL) 92 return (RET_SUCCESS); 93 94 if (sizeof(recno_t) > t->bt_kbufsz) { 95 if ((p = realloc(t->bt_kbuf, sizeof(recno_t))) == NULL) 96 return (RET_ERROR); 97 t->bt_kbuf = p; 98 t->bt_kbufsz = sizeof(recno_t); 99 } 100 memmove(t->bt_kbuf, &nrec, sizeof(recno_t)); 101 key->size = sizeof(recno_t); 102 key->data = t->bt_kbuf; 103 return (RET_SUCCESS); 104 } 105