1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)rec_utils.c 8.1 (Berkeley) 06/04/93"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/param.h> 13 14 #include <stdio.h> 15 #include <stdlib.h> 16 #include <string.h> 17 18 #include <db.h> 19 #include "recno.h" 20 21 /* 22 * __REC_RET -- Build return data as a result of search or scan. 23 * 24 * Parameters: 25 * t: tree 26 * d: LEAF to be returned to the user. 27 * data: user's data structure 28 * 29 * Returns: 30 * RET_SUCCESS, RET_ERROR. 31 */ 32 int 33 __rec_ret(t, e, nrec, key, data) 34 BTREE *t; 35 EPG *e; 36 recno_t nrec; 37 DBT *key, *data; 38 { 39 register RLEAF *rl; 40 register void *p; 41 42 if (data == NULL) 43 goto retkey; 44 45 rl = GETRLEAF(e->page, e->index); 46 47 if (rl->flags & P_BIGDATA) { 48 if (__ovfl_get(t, rl->bytes, 49 &data->size, &t->bt_dbuf, &t->bt_dbufsz)) 50 return (RET_ERROR); 51 } else { 52 /* Use +1 in case the first record retrieved is 0 length. */ 53 if (rl->dsize + 1 > t->bt_dbufsz) { 54 if ((p = realloc(t->bt_dbuf, rl->dsize + 1)) == NULL) 55 return (RET_ERROR); 56 t->bt_dbuf = p; 57 t->bt_dbufsz = rl->dsize + 1; 58 } 59 memmove(t->bt_dbuf, rl->bytes, rl->dsize); 60 data->size = rl->dsize; 61 } 62 data->data = t->bt_dbuf; 63 64 retkey: if (key == NULL) 65 return (RET_SUCCESS); 66 67 if (sizeof(recno_t) > t->bt_kbufsz) { 68 if ((p = realloc(t->bt_kbuf, sizeof(recno_t))) == NULL) 69 return (RET_ERROR); 70 t->bt_kbuf = p; 71 t->bt_kbufsz = sizeof(recno_t); 72 } 73 memmove(t->bt_kbuf, &nrec, sizeof(recno_t)); 74 key->size = sizeof(recno_t); 75 key->data = t->bt_kbuf; 76 return (RET_SUCCESS); 77 } 78