1 files changed, 322 insertions, 0 deletions
diff --git a/contrib/global/lib/dbio.c b/contrib/global/lib/dbio.c
new file mode 100644
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--- /dev/null
+++ b/contrib/global/lib/dbio.c
@@ -0,0 +1,322 @@
+/*
+ * Copyright (c) 1996, 1997 Shigio Yamaguchi. All rights reserved.
+ *
+ * Redilogibution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redilogibutions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redilogibutions 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 dilogibution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Shigio Yamaguchi.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ *	dbio.c					14-Dec-97
+ *
+ */
+#include <stdlib.h>
+#include <fcntl.h>
+#include "dbio.h"
+#include "die.h"
+
+DBT	key;					/* key of record	*/
+DBT	dat;					/* data of record	*/
+/*
+ * db_open: open db database.
+ *
+ *	i)	dbname	database name
+ *	i)	mode	0: read only, 1: write only, 2: read & write
+ *	i)	perm	file permission
+ *	i)	flags
+ *			DBIO_DUP: allow duplicate records.
+ *			DBIO_REMOVE: remove on closed.
+ *	r)		descripter for db_xxx()
+ *
+ * db_open leaves database permission 0600. please chmod(2) to make public.
+ */
+DBIO	*
+db_open(dbname, mode, perm, flags)
+char	*dbname;
+int	mode;
+int	perm;
+int	flags;
+{
+	DB	*db;
+	int     rw;
+	BTREEINFO info;
+	DBIO	*dbio;
+
+	/*
+	 * setup argments.
+	 */
+	if (mode == 0)
+		rw = O_RDONLY;
+	else if (mode == 1)
+		rw = O_RDWR|O_CREAT|O_TRUNC;
+	else if (mode == 2)
+		rw = O_RDWR;
+	else
+		die("db_open illegal mode.");
+	info.flags = (flags & DBIO_DUP) ? R_DUP : 0;
+	info.cachesize = 500000;
+	info.maxkeypage = 0;
+	info.minkeypage = 0;
+	info.psize = 0;
+	info.compare = NULL;
+	info.prefix = NULL;
+	info.lorder = LITTLE_ENDIAN;
+
+	/*
+	 * if unlink do job normally, those who already open tag file can use
+	 * it until closing.
+	 */
+	if (mode == 1 && test("f", dbname))
+		(void)unlink(dbname);
+	db = dbopen(dbname, rw, 0600, DB_BTREE, &info);
+	if (!db)
+		die1("db_open failed (dbname = %s).", dbname);
+	if (!(dbio = (DBIO *)malloc(sizeof(DBIO))))
+		die("short of memory.");
+	strcpy(dbio->dbname, dbname);
+	dbio->db	= db;
+	dbio->openflags	= flags;
+	dbio->perm	= (mode == 1) ? perm : 0;
+	dbio->lastkey	= (char *)0;
+	dbio->lastdat	= (char *)0;
+
+	return dbio;
+}
+/*
+ * db_get: get data by a key.
+ *
+ *	i)	dbio	descripter
+ *	i)	k	key
+ *	r)		pointer to data
+ */
+char	*
+db_get(dbio, k)
+DBIO	*dbio;
+char	*k;
+{
+	DB	*db = dbio->db;
+	int	status;
+
+	key.data = k;
+	key.size = strlen(k)+1;
+
+	status = (*db->get)(db, &key, &dat, 0);
+	dbio->lastkey	= (char *)key.data;
+	dbio->lastdat	= (char *)dat.data;
+	switch (status) {
+	case RET_SUCCESS:
+		break;
+	case RET_ERROR:
+		die("db_get failed.");
+	case RET_SPECIAL:
+		return((char *)0);
+	}
+	return((char *)dat.data);
+}
+/*
+ * db_put: put data by a key.
+ *
+ *	i)	dbio	descripter
+ *	i)	k	key
+ *	i)	d	data
+ */
+void
+db_put(dbio, k, d)
+DBIO	*dbio;
+char	*k;
+char	*d;
+{
+	DB	*db = dbio->db;
+	int	status;
+
+	if (strlen(k) > MAXKEYLEN)
+		die("primary key too long.");
+	key.data = k;
+	key.size = strlen(k)+1;
+	dat.data = d;
+	dat.size = strlen(d)+1;
+
+	status = (*db->put)(db, &key, &dat, 0);
+	switch (status) {
+	case RET_SUCCESS:
+		break;
+	case RET_ERROR:
+	case RET_SPECIAL:
+		die("db_put failed.");
+	}
+}
+/*
+ * db_del: delete record by a key.
+ *
+ *	i)	dbio	descripter
+ *	i)	k	key
+ */
+void
+db_del(dbio, k)
+DBIO	*dbio;
+char	*k;
+{
+	DB	*db = dbio->db;
+	int	status;
+
+	if (k) {
+		key.data = k;
+		key.size = strlen(k)+1;
+		status = (*db->del)(db, &key, 0);
+	} else
+		status = (*db->del)(db, &key, R_CURSOR);
+	if (status == RET_ERROR)
+		die("db_del failed.");
+}
+/*
+ * db_first: get first record. 
+ * 
+ *	i)	dbio	dbio descripter
+ *	i)	k	key
+ *			!=NULL: indexed read by key
+ *			==NULL: sequential read
+ *	i)	flags	following db_next call take over this.
+ *			DBIO_KEY	read key part
+ *			DBIO_PREFIX	prefix read
+ *			DBIO_SKIPMETA	skip META record
+ *					only valied when sequential read
+ *	r)		data
+ */
+char	*
+db_first(dbio, k, flags)
+DBIO	*dbio;
+char	*k;
+int	flags;
+{
+	DB	*db = dbio->db;
+	int	status;
+
+	if (flags & DBIO_PREFIX && !k)
+		flags &= ~DBIO_PREFIX;
+	if (flags & DBIO_SKIPMETA && k)
+		flags &= ~DBIO_SKIPMETA;
+	if (k) {
+		if (strlen(k) > MAXKEYLEN)
+			die("primary key too long.");
+		strcpy(dbio->key, k);
+		key.data = k;
+		key.size = strlen(k);
+		/*
+		 * includes NULL character unless prefix read.
+		 */
+		if (!(flags & DBIO_PREFIX))
+			key.size++;
+		dbio->keylen = key.size;
+		status = (*db->seq)(db, &key, &dat, R_CURSOR);
+	} else {
+		dbio->keylen = dbio->key[0] = 0;
+		for (status = (*db->seq)(db, &key, &dat, R_FIRST);
+			status == RET_SUCCESS	&&
+			flags & DBIO_SKIPMETA	&&
+			*((char *)dat.data) == ' ';
+			status = (*db->seq)(db, &key, &dat, R_NEXT))
+			;
+	}
+	dbio->lastkey	= (char *)key.data;
+	dbio->lastdat	= (char *)dat.data;
+	switch (status) {
+	case RET_SUCCESS:
+		break;
+	case RET_ERROR:
+		die("db_first failed.");
+	case RET_SPECIAL:
+		return ((char *)0);
+	}
+	dbio->ioflags = flags;
+	if (flags & DBIO_PREFIX) {
+		if (strncmp((char *)key.data, dbio->key, dbio->keylen))
+			return (char *)0;
+	} else if (dbio->keylen) {
+		if (strcmp((char *)key.data, dbio->key))
+			return (char *)0;
+	}
+	if (flags & DBIO_KEY) {
+		strcpy(dbio->prev, (char *)key.data);
+		return (char *)key.data;
+	}
+	return ((char *)dat.data);
+}
+/*
+ * db_next: get next record. 
+ * 
+ *	i)	dbio	dbio descripter
+ *	r)		data
+ */
+char	*
+db_next(dbio)
+DBIO	*dbio;
+{
+	DB	*db = dbio->db;
+	int	flags = dbio->ioflags;
+	int	status;
+
+	while ((status = (*db->seq)(db, &key, &dat, R_NEXT)) == RET_SUCCESS) {
+		if (flags & DBIO_SKIPMETA) {
+			if (*((char *)dat.data) == ' ')
+				continue;
+		}
+		if (flags & DBIO_KEY) {
+			if (!strcmp(dbio->prev, (char *)key.data))
+				continue;
+			if (strlen((char *)key.data) > MAXKEYLEN)
+				die("primary key too long.");
+			strcpy(dbio->prev, (char *)key.data);
+		}
+		dbio->lastkey	= (char *)key.data;
+		dbio->lastdat	= (char *)dat.data;
+		if (flags & DBIO_PREFIX) {
+			if (strncmp((char *)key.data, dbio->key, dbio->keylen))
+				return (char *)0;
+		} else if (dbio->keylen) {
+			if (strcmp((char *)key.data, dbio->key))
+				return (char *)0;
+		}
+		return (flags & DBIO_KEY) ? (char *)key.data : (char *)dat.data;
+	}
+	if (status == RET_ERROR)
+		die("db_next failed.");
+	return (char *)0;
+}
+/*
+ * db_close: close db
+ * 
+ *	i)	dbio	dbio descripter
+ */
+void
+db_close(dbio)
+DBIO	*dbio;
+{
+	DB	*db = dbio->db;
+	(void)db->close(db);
+	if (dbio->openflags & DBIO_REMOVE)
+		(void)unlink(dbio->dbname);
+	else if (dbio->perm && chmod(dbio->dbname, dbio->perm) < 0)
+		die("cannot change file mode.");
+	(void)free(dbio);
+}