external/bsd/nvi/dist/common/msg.h

   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. */