Imported Upstream version 4.8.30.NCupstream/4.8.30.NC

1 files changed, 148 insertions, 0 deletions

diff --git a/hsearch/hsearch.c b/hsearch/hsearch.c
new file mode 100644
index 00000000..3269eae3
--- /dev/null
+++ b/hsearch/hsearch.c
@@ -0,0 +1,148 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1996-2009 Oracle.  All rights reserved.
+ */
+/*
+ * Copyright (c) 1990, 1993
+ *	Margo Seltzer.  All rights reserved.
+ */
+/*
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Margo Seltzer.
+ *
+ * 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. 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.
+ *
+ * $Id$
+ */
+
+#define	DB_DBM_HSEARCH	1
+#include "db_config.h"
+
+#include "db_int.h"
+
+static DB	*dbp;
+static ENTRY	 retval;
+
+/*
+ * Translate HSEARCH calls into DB calls so that DB doesn't step on the
+ * application's name space.
+ *
+ * EXTERN: #if DB_DBM_HSEARCH != 0
+ *
+ * EXTERN: int __db_hcreate __P((size_t));
+ * EXTERN: ENTRY *__db_hsearch __P((ENTRY, ACTION));
+ * EXTERN: void __db_hdestroy __P((void));
+ *
+ * EXTERN: #endif
+ */
+int
+__db_hcreate(nel)
+	size_t nel;
+{
+	int ret;
+
+	if ((ret = db_create(&dbp, NULL, 0)) != 0) {
+		__os_set_errno(ret);
+		return (1);
+	}
+
+	if ((ret = dbp->set_pagesize(dbp, 512)) != 0 ||
+	    (ret = dbp->set_h_ffactor(dbp, 16)) != 0 ||
+	    (ret = dbp->set_h_nelem(dbp, (u_int32_t)nel)) != 0 ||
+	    (ret = dbp->open(dbp, NULL,
+	    NULL, NULL, DB_HASH, DB_CREATE, DB_MODE_600)) != 0)
+		__os_set_errno(ret);
+
+	/*
+	 * !!!
+	 * Hsearch returns 0 on error, not 1.
+	 */
+	return (ret == 0 ? 1 : 0);
+}
+
+ENTRY *
+__db_hsearch(item, action)
+	ENTRY item;
+	ACTION action;
+{
+	DBT key, val;
+	int ret;
+
+	if (dbp == NULL) {
+		__os_set_errno(EINVAL);
+		return (NULL);
+	}
+	DB_INIT_DBT(key, item.key, strlen(item.key) + 1);
+	memset(&val, 0, sizeof(val));
+
+	switch (action) {
+	case ENTER:
+		DB_SET_DBT(val, item.data, strlen(item.data) + 1);
+
+		/*
+		 * Try and add the key to the database.  If we fail because
+		 * the key already exists, return the existing key.
+		 */
+		if ((ret =
+		    dbp->put(dbp, NULL, &key, &val, DB_NOOVERWRITE)) == 0)
+			break;
+		if (ret == DB_KEYEXIST &&
+		    (ret = dbp->get(dbp, NULL, &key, &val, 0)) == 0)
+			break;
+		/*
+		 * The only possible DB error is DB_NOTFOUND, and it can't
+		 * happen.  Check for a DB error, and lie if we find one.
+		 */
+		__os_set_errno(ret > 0 ? ret : EINVAL);
+		return (NULL);
+	case FIND:
+		if ((ret = dbp->get(dbp, NULL, &key, &val, 0)) != 0) {
+			if (ret != DB_NOTFOUND)
+				__os_set_errno(ret);
+			return (NULL);
+		}
+		item.data = (char *)val.data;
+		break;
+	default:
+		__os_set_errno(EINVAL);
+		return (NULL);
+	}
+	retval.key = item.key;
+	retval.data = item.data;
+	return (&retval);
+}
+
+void
+__db_hdestroy()
+{
+	if (dbp != NULL) {
+		(void)dbp->close(dbp, 0);
+		dbp = NULL;
+	}
+}