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

   1 /*      $NetBSD: v_util.c,v 1.2 2013/11/22 15:52:06 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 #ifndef lint
  14 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 ";
  15 #endif /* not lint */
  16
  17 #include <sys/types.h>
  18 #include <sys/queue.h>
  19 #include <sys/time.h>
  20
  21 #include <bitstring.h>
  22 #include <ctype.h>
  23 #include <limits.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28
  29 #include "../common/common.h"
  30 #include "vi.h"
  31
  32 /*
  33  * v_eof --
  34  *      Vi end-of-file error.
  35  *
  36  * PUBLIC: void v_eof __P((SCR *, MARK *));
  37  */
  38 void
  39 v_eof(SCR *sp, MARK *mp)
  40 {
  41         db_recno_t lno;
  42
  43         if (mp == NULL)
  44                 v_emsg(sp, NULL, VIM_EOF);
  45         else {
  46                 if (db_last(sp, &lno))
  47                         return;
  48                 if (mp->lno >= lno)
  49                         v_emsg(sp, NULL, VIM_EOF);
  50                 else
  51                         msgq(sp, M_BERR, "195|Movement past the end-of-file");
  52         }
  53 }
  54
  55 /*
  56  * v_eol --
  57  *      Vi end-of-line error.
  58  *
  59  * PUBLIC: void v_eol __P((SCR *, MARK *));
  60  */
  61 void
  62 v_eol(SCR *sp, MARK *mp)
  63 {
  64         size_t len;
  65
  66         if (mp == NULL)
  67                 v_emsg(sp, NULL, VIM_EOL);
  68         else {
  69                 if (db_get(sp, mp->lno, DBG_FATAL, NULL, &len))
  70                         return;
  71                 if (mp->cno == len - 1)
  72                         v_emsg(sp, NULL, VIM_EOL);
  73                 else
  74                         msgq(sp, M_BERR, "196|Movement past the end-of-line");
  75         }
  76 }
  77
  78 /*
  79  * v_nomove --
  80  *      Vi no cursor movement error.
  81  *
  82  * PUBLIC: void v_nomove __P((SCR *));
  83  */
  84 void
  85 v_nomove(SCR *sp)
  86 {
  87         msgq(sp, M_BERR, "197|No cursor movement made");
  88 }
  89
  90 /*
  91  * v_sof --
  92  *      Vi start-of-file error.
  93  *
  94  * PUBLIC: void v_sof __P((SCR *, MARK *));
  95  */
  96 void
  97 v_sof(SCR *sp, MARK *mp)
  98 {
  99         if (mp == NULL || mp->lno == 1)
 100                 msgq(sp, M_BERR, "198|Already at the beginning of the file");
 101         else
 102                 msgq(sp, M_BERR, "199|Movement past the beginning of the file");
 103 }
 104
 105 /*
 106  * v_sol --
 107  *      Vi start-of-line error.
 108  *
 109  * PUBLIC: void v_sol __P((SCR *));
 110  */
 111 void
 112 v_sol(SCR *sp)
 113 {
 114         msgq(sp, M_BERR, "200|Already in the first column");
 115 }
 116
 117 /*
 118  * v_isempty --
 119  *      Return if the line contains nothing but white-space characters.
 120  *
 121  * PUBLIC: int v_isempty __P((CHAR_T *, size_t));
 122  */
 123 int
 124 v_isempty(CHAR_T *p, size_t len)
 125 {
 126         for (; len--; ++p)
 127                 if (!ISBLANK((UCHAR_T)*p))
 128                         return (0);
 129         return (1);
 130 }
 131
 132 /*
 133  * v_emsg --
 134  *      Display a few common vi messages.
 135  *
 136  * PUBLIC: void v_emsg __P((SCR *, const char *, vim_t));
 137  */
 138 void
 139 v_emsg(SCR *sp, const char *p, vim_t which)
 140 {
 141         switch (which) {
 142         case VIM_COMBUF:
 143                 msgq(sp, M_ERR,
 144                     "201|Buffers should be specified before the command");
 145                 break;
 146         case VIM_EMPTY:
 147                 msgq(sp, M_BERR, "209|The file is empty");
 148                 break;
 149         case VIM_EOF:
 150                 msgq(sp, M_BERR, "202|Already at end-of-file");
 151                 break;
 152         case VIM_EOL:
 153                 msgq(sp, M_BERR, "203|Already at end-of-line");
 154                 break;
 155         case VIM_NOCOM:
 156         case VIM_NOCOM_B:
 157                 msgq(sp,
 158                     which == VIM_NOCOM_B ? M_BERR : M_ERR,
 159                     "204|%s isn't a vi command", p);
 160                 break;
 161         case VIM_WRESIZE:
 162                 msgq(sp, M_ERR, "Window resize interrupted text input mode");
 163                 break;
 164         case VIM_USAGE:
 165                 msgq(sp, M_ERR, "205|Usage: %s", p);
 166                 break;
 167         }
 168 }