Add less 643

third_party/less/option.h

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 1984-2023  Mark Nudelman
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Less License, as specified in the README file.
+ *
+ * For more information, see the README file.
+ */
+
+
+#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 INIT_HANDLER    01000   /* Call option handler function at startup */
+
+#define OTYPE           (BOOL|TRIPLE|NUMBER|STRING|NOVAR)
+
+#define OLETTER_NONE    '\1'     /* Invalid option letter */
+
+/*
+ * 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
+#define OPT_NO_PROMPT   0100
+
+/* Error code from findopt_name */
+#define OPT_AMBIG       1
+
+struct optname
+{
+        char *oname;            /* Long (GNU-style) option name */
+        struct optname *onext;  /* List of synonymous option names */
+};
+
+#define OPTNAME_MAX     32      /* Max length of long option name */
+
+struct loption
+{
+        char oletter;           /* The controlling letter (a-z) */
+        struct optname *onames; /* Long (GNU-style) option name */
+        int otype;              /* Type of the option */
+        int odefault;           /* Default value */
+        int *ovar;              /* Pointer to the associated variable */
+        void (*ofunc)(int, char*); /* Pointer to special handling function */
+        char *odesc[3];         /* Description of each value */
+};
+