diff options
Diffstat (limited to 'db/recno/rec_get.c')
| -rw-r--r-- | db/recno/rec_get.c | 311 |
1 files changed, 0 insertions, 311 deletions
diff --git a/db/recno/rec_get.c b/db/recno/rec_get.c deleted file mode 100644 index 47dd773fb9..0000000000 --- a/db/recno/rec_get.c +++ /dev/null @@ -1,311 +0,0 @@ -/*- - * Copyright (c) 1990, 1993, 1994 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#if defined(LIBC_SCCS) && !defined(lint) -static char sccsid[] = "@(#)rec_get.c 8.9 (Berkeley) 8/18/94"; -#endif /* LIBC_SCCS and not lint */ - -#include <sys/types.h> - -#include <errno.h> -#include <stddef.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include <db.h> -#include "recno.h" - -/* - * __REC_GET -- Get a record from the btree. - * - * Parameters: - * dbp: pointer to access method - * key: key to find - * data: data to return - * flag: currently unused - * - * Returns: - * RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found. - */ -int -__rec_get(dbp, key, data, flags) - const DB *dbp; - const DBT *key; - DBT *data; - u_int flags; -{ - BTREE *t; - EPG *e; - recno_t nrec; - int status; - - t = dbp->internal; - - /* Toss any page pinned across calls. */ - if (t->bt_pinned != NULL) { - mpool_put(t->bt_mp, t->bt_pinned, 0); - t->bt_pinned = NULL; - } - - /* Get currently doesn't take any flags, and keys of 0 are illegal. */ - if (flags || (nrec = *(recno_t *)key->data) == 0) { - errno = EINVAL; - return (RET_ERROR); - } - - /* - * If we haven't seen this record yet, try to find it in the - * original file. - */ - if (nrec > t->bt_nrecs) { - if (F_ISSET(t, R_EOF | R_INMEM)) - return (RET_SPECIAL); - if ((status = t->bt_irec(t, nrec)) != RET_SUCCESS) - return (status); - } - - --nrec; - if ((e = __rec_search(t, nrec, SEARCH)) == NULL) - return (RET_ERROR); - - status = __rec_ret(t, e, 0, NULL, data); - if (F_ISSET(t, B_DB_LOCK)) - mpool_put(t->bt_mp, e->page, 0); - else - t->bt_pinned = e->page; - return (status); -} - -/* - * __REC_FPIPE -- Get fixed length records from a pipe. - * - * Parameters: - * t: tree - * cnt: records to read - * - * Returns: - * RET_ERROR, RET_SUCCESS - */ -int -__rec_fpipe(t, top) - BTREE *t; - recno_t top; -{ - DBT data; - recno_t nrec; - size_t len; - int ch; - u_char *p; - - if (t->bt_rdata.size < t->bt_reclen) { - t->bt_rdata.data = t->bt_rdata.data == NULL ? - malloc(t->bt_reclen) : - realloc(t->bt_rdata.data, t->bt_reclen); - if (t->bt_rdata.data == NULL) - return (RET_ERROR); - t->bt_rdata.size = t->bt_reclen; - } - data.data = t->bt_rdata.data; - data.size = t->bt_reclen; - - for (nrec = t->bt_nrecs; nrec < top;) { - len = t->bt_reclen; - for (p = t->bt_rdata.data;; *p++ = ch) - if ((ch = getc(t->bt_rfp)) == EOF || !--len) { - if (ch != EOF) - *p = ch; - if (len != 0) - memset(p, t->bt_bval, len); - if (__rec_iput(t, - nrec, &data, 0) != RET_SUCCESS) - return (RET_ERROR); - ++nrec; - break; - } - if (ch == EOF) - break; - } - if (nrec < top) { - F_SET(t, R_EOF); - return (RET_SPECIAL); - } - return (RET_SUCCESS); -} - -/* - * __REC_VPIPE -- Get variable length records from a pipe. - * - * Parameters: - * t: tree - * cnt: records to read - * - * Returns: - * RET_ERROR, RET_SUCCESS - */ -int -__rec_vpipe(t, top) - BTREE *t; - recno_t top; -{ - DBT data; - recno_t nrec; - indx_t len; - size_t sz; - int bval, ch; - u_char *p; - - bval = t->bt_bval; - for (nrec = t->bt_nrecs; nrec < top; ++nrec) { - for (p = t->bt_rdata.data, - sz = t->bt_rdata.size;; *p++ = ch, --sz) { - if ((ch = getc(t->bt_rfp)) == EOF || ch == bval) { - data.data = t->bt_rdata.data; - data.size = p - (u_char *)t->bt_rdata.data; - if (ch == EOF && data.size == 0) - break; - if (__rec_iput(t, nrec, &data, 0) - != RET_SUCCESS) - return (RET_ERROR); - break; - } - if (sz == 0) { - len = p - (u_char *)t->bt_rdata.data; - t->bt_rdata.size += (sz = 256); - t->bt_rdata.data = t->bt_rdata.data == NULL ? - malloc(t->bt_rdata.size) : - realloc(t->bt_rdata.data, t->bt_rdata.size); - if (t->bt_rdata.data == NULL) - return (RET_ERROR); - p = (u_char *)t->bt_rdata.data + len; - } - } - if (ch == EOF) - break; - } - if (nrec < top) { - F_SET(t, R_EOF); - return (RET_SPECIAL); - } - return (RET_SUCCESS); -} - -/* - * __REC_FMAP -- Get fixed length records from a file. - * - * Parameters: - * t: tree - * cnt: records to read - * - * Returns: - * RET_ERROR, RET_SUCCESS - */ -int -__rec_fmap(t, top) - BTREE *t; - recno_t top; -{ - DBT data; - recno_t nrec; - u_char *sp, *ep, *p; - size_t len; - - if (t->bt_rdata.size < t->bt_reclen) { - t->bt_rdata.data = t->bt_rdata.data == NULL ? - malloc(t->bt_reclen) : - realloc(t->bt_rdata.data, t->bt_reclen); - if (t->bt_rdata.data == NULL) - return (RET_ERROR); - t->bt_rdata.size = t->bt_reclen; - } - data.data = t->bt_rdata.data; - data.size = t->bt_reclen; - - sp = (u_char *)t->bt_cmap; - ep = (u_char *)t->bt_emap; - for (nrec = t->bt_nrecs; nrec < top; ++nrec) { - if (sp >= ep) { - F_SET(t, R_EOF); - return (RET_SPECIAL); - } - len = t->bt_reclen; - for (p = t->bt_rdata.data; - sp < ep && len > 0; *p++ = *sp++, --len); - if (len != 0) - memset(p, t->bt_bval, len); - if (__rec_iput(t, nrec, &data, 0) != RET_SUCCESS) - return (RET_ERROR); - } - t->bt_cmap = (caddr_t)sp; - return (RET_SUCCESS); -} - -/* - * __REC_VMAP -- Get variable length records from a file. - * - * Parameters: - * t: tree - * cnt: records to read - * - * Returns: - * RET_ERROR, RET_SUCCESS - */ -int -__rec_vmap(t, top) - BTREE *t; - recno_t top; -{ - DBT data; - u_char *sp, *ep; - recno_t nrec; - int bval; - - sp = (u_char *)t->bt_cmap; - ep = (u_char *)t->bt_emap; - bval = t->bt_bval; - - for (nrec = t->bt_nrecs; nrec < top; ++nrec) { - if (sp >= ep) { - F_SET(t, R_EOF); - return (RET_SPECIAL); - } - for (data.data = sp; sp < ep && *sp != bval; ++sp); - data.size = sp - (u_char *)data.data; - if (__rec_iput(t, nrec, &data, 0) != RET_SUCCESS) - return (RET_ERROR); - ++sp; - } - t->bt_cmap = (caddr_t)sp; - return (RET_SUCCESS); -} |