Added userspace db files.

2025-10-21 22:00:13 +08:00 · 2012-09-12 10:59:41 -05:00
parent a4e4484df6
commit e4e17463bb
30 changed files with 7083 additions and 0 deletions
--- a/freebsd-userspace/lib/libc/db/recno/rec_utils.c
+++ b/freebsd-userspace/lib/libc/db/recno/rec_utils.c
@@ -0,0 +1,114 @@
+#include "port_before.h"
+
+/*-
+ * 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.
+ * 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_utils.c	8.6 (Berkeley) 7/16/94";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <db.h>
+#include "recno.h"
+
+/*
+ * __rec_ret --
+ *	Build return data.
+ *
+ * Parameters:
+ *	t:	tree
+ *	e:	key/data pair to be returned
+ *   nrec:	record number
+ *    key:	user's key structure
+ *   data:	user's data structure
+ *
+ * Returns:
+ *	RET_SUCCESS, RET_ERROR.
+ */
+int
+__rec_ret(BTREE *t, EPG *e, recno_t nrec, DBT *key, DBT *data)
+{
+	RLEAF *rl;
+	void *p;
+
+	if (key == NULL)
+		goto dataonly;
+
+	/* We have to copy the key, it's not on the page. */
+	if (sizeof(recno_t) > t->bt_rkey.size) {
+		p = realloc(t->bt_rkey.data, sizeof(recno_t));
+		if (p == NULL)
+			return (RET_ERROR);
+		t->bt_rkey.data = p;
+		t->bt_rkey.size = sizeof(recno_t);
+	}
+	memmove(t->bt_rkey.data, &nrec, sizeof(recno_t));
+	key->size = sizeof(recno_t);
+	key->data = t->bt_rkey.data;
+
+dataonly:
+	if (data == NULL)
+		return (RET_SUCCESS);
+
+	/*
+	 * We must copy big keys/data to make them contigous.  Otherwise,
+	 * leave the page pinned and don't copy unless the user specified
+	 * concurrent access.
+	 */
+	rl = GETRLEAF(e->page, e->index);
+	if (rl->flags & P_BIGDATA) {
+		if (__ovfl_get(t, rl->bytes,
+		    &data->size, &t->bt_rdata.data, &t->bt_rdata.size))
+			return (RET_ERROR);
+		data->data = t->bt_rdata.data;
+	} else if (F_ISSET(t, B_DB_LOCK)) {
+		/* Use +1 in case the first record retrieved is 0 length. */
+		if (rl->dsize + 1 > t->bt_rdata.size) {
+			p = realloc(t->bt_rdata.data, rl->dsize + 1);
+			if (p == NULL)
+				return (RET_ERROR);
+			t->bt_rdata.data = p;
+			t->bt_rdata.size = rl->dsize + 1;
+		}
+		memmove(t->bt_rdata.data, rl->bytes, rl->dsize);
+		data->size = rl->dsize;
+		data->data = t->bt_rdata.data;
+	} else {
+		data->size = rl->dsize;
+		data->data = rl->bytes;
+	}
+	return (RET_SUCCESS);
+}