Import of unmolested less-290.

1 files changed, 67 insertions, 0 deletions

diff --git a/usr.bin/less/option.h b/usr.bin/less/option.h
new file mode 100644
index 00000000000..59a72cf0ca0
--- /dev/null
+++ b/usr.bin/less/option.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 1984,1985,1989,1994,1995  Mark Nudelman
+ * 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 in the documentation and/or other materials provided with 
+ *    the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
+ */
+
+
+#define	END_OPTION_STRING	('$')
+
+/*
+ * Types of options.
+ */
+#define	BOOL		01	/* Boolean option: 0 or 1 */
+#define	TRIPLE		02	/* Triple-valued option: 0, 1 or 2 */
+#define	NUMBER		04	/* Numeric option */
+#define	STRING		010	/* String-valued option */
+#define	NOVAR		020	/* No associated variable */
+#define	REPAINT		040	/* Repaint screen after toggling option */
+#define	NO_TOGGLE	0100	/* Option cannot be toggled with "-" cmd */
+#define	HL_REPAINT	0200	/* Repaint hilites after toggling option */
+#define	NO_QUERY	0400	/* Option cannot be queried with "_" cmd */
+
+#define	OTYPE		(BOOL|TRIPLE|NUMBER|STRING|NOVAR)
+
+/*
+ * Argument to a handling function tells what type of activity:
+ */
+#define	INIT	0	/* Initialization (from command line) */
+#define	QUERY	1	/* Query (from _ or - command) */
+#define	TOGGLE	2	/* Change value (from - command) */
+
+/* Flag to toggle_option to specify how to "toggle" */
+#define	OPT_NO_TOGGLE	0
+#define	OPT_TOGGLE	1
+#define	OPT_UNSET	2
+#define	OPT_SET		3
+
+struct option
+{
+	char oletter;		/* The controlling letter (a-z) */
+	int otype;		/* Type of the option */
+	int odefault;		/* Default value */
+	int *ovar;		/* Pointer to the associated variable */
+	void (*ofunc)();	/* Pointer to special handling function */
+	char *odesc[3];		/* Description of each value */
+};
+