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      1 /*	$NetBSD: msg.h,v 1.2 2013/11/22 15:52:05 christos Exp $	*/
      2 /*-
      3  * Copyright (c) 1993, 1994
      4  *	The Regents of the University of California.  All rights reserved.
      5  * Copyright (c) 1993, 1994, 1995, 1996
      6  *	Keith Bostic.  All rights reserved.
      7  *
      8  * See the LICENSE file for redistribution information.
      9  *
     10  *	Id: msg.h,v 10.11 2000/04/21 21:26:19 skimo Exp  (Berkeley) Date: 2000/04/21 21:26:19
     11  */
     12 
     13 /*
     14  * Common messages (continuation or confirmation).
     15  */
     16 typedef enum {
     17 	CMSG_CONF, CMSG_CONT, CMSG_CONT_EX,
     18 	CMSG_CONT_R, CMSG_CONT_S, CMSG_CONT_Q } cmsg_t;
     19 
     20 /*
     21  * Message types.
     22  *
     23  * !!!
     24  * In historical vi, O_VERBOSE didn't exist, and O_TERSE made the error
     25  * messages shorter.  In this implementation, O_TERSE has no effect and
     26  * O_VERBOSE results in informational displays about common errors, for
     27  * naive users.
     28  *
     29  * M_NONE	Display to the user, no reformatting, no nothing.
     30  *
     31  * M_BERR	Error: M_ERR if O_VERBOSE, else bell.
     32  * M_ERR	Error: Display in inverse video.
     33  * M_INFO	 Info: Display in normal video.
     34  * M_SYSERR	Error: M_ERR, using strerror(3) message.
     35  * M_VINFO	 Info: M_INFO if O_VERBOSE, else ignore.
     36  *
     37  * The underlying message display routines only need to know about M_NONE,
     38  * M_ERR and M_INFO -- all the other message types are converted into one
     39  * of them by the message routines.
     40  */
     41 typedef enum {
     42 	M_NONE = 1, M_BERR, M_ERR, M_INFO, M_SYSERR, M_VINFO, M_DBERR } mtype_t;
     43 
     44 /*
     45  * There are major problems with error messages being generated by routines
     46  * preparing the screen to display error messages.  It's possible for the
     47  * editor to generate messages before we have a screen in which to display
     48  * them, or during the transition between ex (and vi startup) and a true vi.
     49  * There's a queue in the global area to hold them.
     50  *
     51  * If SC_EX/SC_VI is set, that's the mode that the editor is in.  If the flag
     52  * S_SCREEN_READY is set, that means that the screen is prepared to display
     53  * messages.
     54  */
     55 typedef struct _msgh MSGH;	/* MSGS list head structure. */
     56 LIST_HEAD(_msgh, _msg);
     57 struct _msg {
     58 	LIST_ENTRY(_msg) q;	/* Linked list of messages. */
     59 	mtype_t	 mtype;		/* Message type: M_NONE, M_ERR, M_INFO. */
     60 	char	*buf;		/* Message buffer. */
     61 	size_t	 len;		/* Message length. */
     62 };
     63 
     64 /* Flags to msgq_status(). */
     65 #define	MSTAT_SHOWLAST	0x01	/* Show the line number of the last line. */
     66 #define	MSTAT_TRUNCATE	0x02	/* Truncate the file name if it's too long. */
     67