vi/v_util.c

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