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authorUlrich Drepper <drepper@redhat.com>2000-01-02 06:01:06 +0000
committerUlrich Drepper <drepper@redhat.com>2000-01-02 06:01:06 +0000
commit8d6f1731fcd082e4f744ba9cb4bde4be7c08f1b3 (patch)
tree099a250d7366aef2ab028fdb24f0d692cd784b4a /db/btree/bt_overflow.c
parent9a6450d578556c11e7c173d2f28362345b8f1258 (diff)
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Update.
	* Makeconfig (all-subdirs): Remove db and db2.
	* db/*: Removed.
	* db2/*: Removed.
Diffstat (limited to 'db/btree/bt_overflow.c')
-rw-r--r--db/btree/bt_overflow.c228
1 files changed, 0 insertions, 228 deletions
diff --git a/db/btree/bt_overflow.c b/db/btree/bt_overflow.c
deleted file mode 100644
index b28b8e0471..0000000000
--- a/db/btree/bt_overflow.c
+++ /dev/null
@@ -1,228 +0,0 @@
-/*-
- * Copyright (c) 1990, 1993, 1994
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Mike Olson.
- *
- * 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[] = "@(#)bt_overflow.c	8.5 (Berkeley) 7/16/94";
-#endif /* LIBC_SCCS and not lint */
-
-#include <sys/param.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <db.h>
-#include "btree.h"
-
-/*
- * Big key/data code.
- *
- * Big key and data entries are stored on linked lists of pages.  The initial
- * reference is byte string stored with the key or data and is the page number
- * and size.  The actual record is stored in a chain of pages linked by the
- * nextpg field of the PAGE header.
- *
- * The first page of the chain has a special property.  If the record is used
- * by an internal page, it cannot be deleted and the P_PRESERVE bit will be set
- * in the header.
- *
- * XXX
- * A single DBT is written to each chain, so a lot of space on the last page
- * is wasted.  This is a fairly major bug for some data sets.
- */
-
-/*
- * __OVFL_GET -- Get an overflow key/data item.
- *
- * Parameters:
- *	t:	tree
- *	p:	pointer to { pgno_t, u_int32_t }
- *	buf:	storage address
- *	bufsz:	storage size
- *
- * Returns:
- *	RET_ERROR, RET_SUCCESS
- */
-int
-__ovfl_get(t, p, ssz, buf, bufsz)
-	BTREE *t;
-	void *p;
-	size_t *ssz;
-	void **buf;
-	size_t *bufsz;
-{
-	PAGE *h;
-	pgno_t pg;
-	size_t nb, plen;
-	u_int32_t sz;
-
-	memmove(&pg, p, sizeof(pgno_t));
-	memmove(&sz, (char *)p + sizeof(pgno_t), sizeof(u_int32_t));
-	*ssz = sz;
-
-#ifdef DEBUG
-	if (pg == P_INVALID || sz == 0)
-		abort();
-#endif
-	/* Make the buffer bigger as necessary. */
-	if (*bufsz < sz) {
-		*buf = (char *)(*buf == NULL ? malloc(sz) : realloc(*buf, sz));
-		if (*buf == NULL)
-			return (RET_ERROR);
-		*bufsz = sz;
-	}
-
-	/*
-	 * Step through the linked list of pages, copying the data on each one
-	 * into the buffer.  Never copy more than the data's length.
-	 */
-	plen = t->bt_psize - BTDATAOFF;
-	for (p = *buf;; p = (char *)p + nb, pg = h->nextpg) {
-		if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
-			return (RET_ERROR);
-
-		nb = MIN(sz, plen);
-		memmove(p, (char *)h + BTDATAOFF, nb);
-		mpool_put(t->bt_mp, h, 0);
-
-		if ((sz -= nb) == 0)
-			break;
-	}
-	return (RET_SUCCESS);
-}
-
-/*
- * __OVFL_PUT -- Store an overflow key/data item.
- *
- * Parameters:
- *	t:	tree
- *	data:	DBT to store
- *	pgno:	storage page number
- *
- * Returns:
- *	RET_ERROR, RET_SUCCESS
- */
-int
-__ovfl_put(t, dbt, pg)
-	BTREE *t;
-	const DBT *dbt;
-	pgno_t *pg;
-{
-	PAGE *h, *last;
-	void *p;
-	pgno_t npg;
-	size_t nb, plen;
-	u_int32_t sz;
-
-	/*
-	 * Allocate pages and copy the key/data record into them.  Store the
-	 * number of the first page in the chain.
-	 */
-	plen = t->bt_psize - BTDATAOFF;
-	for (last = NULL, p = dbt->data, sz = dbt->size;;
-	    p = (char *)p + plen, last = h) {
-		if ((h = __bt_new(t, &npg)) == NULL)
-			return (RET_ERROR);
-
-		h->pgno = npg;
-		h->nextpg = h->prevpg = P_INVALID;
-		h->flags = P_OVERFLOW;
-		h->lower = h->upper = 0;
-
-		nb = MIN(sz, plen);
-		memmove((char *)h + BTDATAOFF, p, nb);
-
-		if (last) {
-			last->nextpg = h->pgno;
-			mpool_put(t->bt_mp, last, MPOOL_DIRTY);
-		} else
-			*pg = h->pgno;
-
-		if ((sz -= nb) == 0) {
-			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
-			break;
-		}
-	}
-	return (RET_SUCCESS);
-}
-
-/*
- * __OVFL_DELETE -- Delete an overflow chain.
- *
- * Parameters:
- *	t:	tree
- *	p:	pointer to { pgno_t, u_int32_t }
- *
- * Returns:
- *	RET_ERROR, RET_SUCCESS
- */
-int
-__ovfl_delete(t, p)
-	BTREE *t;
-	void *p;
-{
-	PAGE *h;
-	pgno_t pg;
-	size_t plen;
-	u_int32_t sz;
-
-	memmove(&pg, p, sizeof(pgno_t));
-	memmove(&sz, (char *)p + sizeof(pgno_t), sizeof(u_int32_t));
-
-#ifdef DEBUG
-	if (pg == P_INVALID || sz == 0)
-		abort();
-#endif
-	if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
-		return (RET_ERROR);
-
-	/* Don't delete chains used by internal pages. */
-	if (h->flags & P_PRESERVE) {
-		mpool_put(t->bt_mp, h, 0);
-		return (RET_SUCCESS);
-	}
-
-	/* Step through the chain, calling the free routine for each page. */
-	for (plen = t->bt_psize - BTDATAOFF;; sz -= plen) {
-		pg = h->nextpg;
-		__bt_free(t, h);
-		if (sz <= plen)
-			break;
-		if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
-			return (RET_ERROR);
-	}
-	return (RET_SUCCESS);
-}