Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/tt/mini_isam/ispageio.c

@@ -0,0 +1,69 @@
+/*%%  (c) Copyright 1993, 1994 Hewlett-Packard Company			 */
+/*%%  (c) Copyright 1993, 1994 International Business Machines Corp.	 */
+/*%%  (c) Copyright 1993, 1994 Sun Microsystems, Inc.			 */
+/*%%  (c) Copyright 1993, 1994 Novell, Inc. 				 */
+/*%%  $XConsortium: ispageio.c /main/3 1995/10/23 11:42:51 rswiston $ 			 				 */
+#ifndef lint
+static char sccsid[] = "@(#)ispageio.c 1.3 89/07/17 Copyr 1988 Sun Micro";
+#endif
+/*
+ * Copyright (c) 1988 by Sun Microsystems, Inc.
+ */
+
+/*
+ * ispageio.c
+ *
+ * Description: 
+ *	I/O functions for file pages.
+ *	
+ *
+ */
+
+#include "isam_impl.h"
+
+/*
+ * _isseekpg(fd, pgno)
+ *
+ * Set current file pointer to the page pgno.
+ */
+
+void
+_isseekpg(fd, pgno)
+    int		fd;
+    Blkno	pgno;
+{
+    long	offset = pgno * ISPAGESIZE;
+
+    if (lseek(fd, offset, 0) != offset)
+	_isfatal_error("lseek failed");
+}
+
+/*
+ * _isreadpg(fd, buf)
+ *
+ * Read eon block from UNIX file into a buffer.
+ */
+
+void
+_isreadpg(fd, buf)
+    int		fd;
+    char	*buf;
+{
+    if (read(fd, buf, ISPAGESIZE) != ISPAGESIZE)
+	_isfatal_error("read failed");
+}
+
+/*
+ * _iswritepg(fd, buf)
+ *
+ * Write one block to UNIX file.
+ */
+
+void
+_iswritepg(fd, buf)
+    int		fd;
+    char	*buf;
+{
+    if (write(fd, buf, ISPAGESIZE) != ISPAGESIZE)
+	_isfatal_error("write failed");
+}