external/bsd/nvi/dist/vi/v_util.c

   1 /*      $NetBSD: v_util.c,v 1.3 2014/01/26 21:43:45 christos Exp $ */
   2 /*-
   3  * Copyright (c) 1992, 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   6  *      Keith Bostic.  All rights reserved.
   7  *
   8  * See the LICENSE file for redistribution information.
   9  */
  10
  11 #include "config.h"
  12
  13 #include <sys/cdefs.h>
  14 #if 0
  15 #ifndef lint
  16 static const char sccsid[] = "Id: v_util.c,v 10.14 2001/06/25 15:19:36 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:36 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: v_util.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
  20 #endif
  21
  22 #include <sys/types.h>
  23 #include <sys/queue.h>
  24 #include <sys/time.h>
  25
  26 #include <bitstring.h>
  27 #include <ctype.h>
  28 #include <limits.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33
  34 #include "../common/common.h"
  35 #include "vi.h"
  36
  37 /*
  38  * v_eof --
  39  *      Vi end-of-file error.
  40  *
  41  * PUBLIC: void v_eof __P((SCR *, MARK *));
  42  */
  43 void
  44 v_eof(SCR *sp, MARK *mp)
  45 {
  46         db_recno_t lno;
  47
  48         if (mp == NULL)
  49                 v_emsg(sp, NULL, VIM_EOF);
  50         else {
  51                 if (db_last(sp, &lno))
  52                         return;
  53                 if (mp->lno >= lno)
  54                         v_emsg(sp, NULL, VIM_EOF);
  55                 else
  56                         msgq(sp, M_BERR, "195|Movement past the end-of-file");
  57         }
  58 }
  59
  60 /*
  61  * v_eol --
  62  *      Vi end-of-line error.
  63  *
  64  * PUBLIC: void v_eol __P((SCR *, MARK *));
  65  */
  66 void
  67 v_eol(SCR *sp, MARK *mp)
  68 {
  69         size_t len;
  70
  71         if (mp == NULL)
  72                 v_emsg(sp, NULL, VIM_EOL);
  73         else {
  74                 if (db_get(sp, mp->lno, DBG_FATAL, NULL, &len))
  75                         return;
  76                 if (mp->cno == len - 1)
  77                         v_emsg(sp, NULL, VIM_EOL);
  78                 else
  79                         msgq(sp, M_BERR, "196|Movement past the end-of-line");
  80         }
  81 }
  82
  83 /*
  84  * v_nomove --
  85  *      Vi no cursor movement error.
  86  *
  87  * PUBLIC: void v_nomove __P((SCR *));
  88  */
  89 void
  90 v_nomove(SCR *sp)
  91 {
  92         msgq(sp, M_BERR, "197|No cursor movement made");
  93 }
  94
  95 /*
  96  * v_sof --
  97  *      Vi start-of-file error.
  98  *
  99  * PUBLIC: void v_sof __P((SCR *, MARK *));
 100  */
 101 void
 102 v_sof(SCR *sp, MARK *mp)
 103 {
 104         if (mp == NULL || mp->lno == 1)
 105                 msgq(sp, M_BERR, "198|Already at the beginning of the file");
 106         else
 107                 msgq(sp, M_BERR, "199|Movement past the beginning of the file");
 108 }
 109
 110 /*
 111  * v_sol --
 112  *      Vi start-of-line error.
 113  *
 114  * PUBLIC: void v_sol __P((SCR *));
 115  */
 116 void
 117 v_sol(SCR *sp)
 118 {
 119         msgq(sp, M_BERR, "200|Already in the first column");
 120 }
 121
 122 /*
 123  * v_isempty --
 124  *      Return if the line contains nothing but white-space characters.
 125  *
 126  * PUBLIC: int v_isempty __P((CHAR_T *, size_t));
 127  */
 128 int
 129 v_isempty(CHAR_T *p, size_t len)
 130 {
 131         for (; len--; ++p)
 132                 if (!ISBLANK((UCHAR_T)*p))
 133                         return (0);
 134         return (1);
 135 }
 136
 137 /*
 138  * v_emsg --
 139  *      Display a few common vi messages.
 140  *
 141  * PUBLIC: void v_emsg __P((SCR *, const char *, vim_t));
 142  */
 143 void
 144 v_emsg(SCR *sp, const char *p, vim_t which)
 145 {
 146         switch (which) {
 147         case VIM_COMBUF:
 148                 msgq(sp, M_ERR,
 149                     "201|Buffers should be specified before the command");
 150                 break;
 151         case VIM_EMPTY:
 152                 msgq(sp, M_BERR, "209|The file is empty");
 153                 break;
 154         case VIM_EOF:
 155                 msgq(sp, M_BERR, "202|Already at end-of-file");
 156                 break;
 157         case VIM_EOL:
 158                 msgq(sp, M_BERR, "203|Already at end-of-line");
 159                 break;
 160         case VIM_NOCOM:
 161         case VIM_NOCOM_B:
 162                 msgq(sp,
 163                     which == VIM_NOCOM_B ? M_BERR : M_ERR,
 164                     "204|%s isn't a vi command", p);
 165                 break;
 166         case VIM_WRESIZE:
 167                 msgq(sp, M_ERR, "Window resize interrupted text input mode");
 168                 break;
 169         case VIM_USAGE:
 170                 msgq(sp, M_ERR, "205|Usage: %s", p);
 171                 break;
 172         }
 173 }