vi/v_right.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * %sccs.include.redist.c%
   6  */
   7
   8 #ifndef lint
   9 static char sccsid[] = "$Id: v_right.c,v 8.2 1993/08/16 21:10:07 bostic Exp $ (Berkeley) $Date: 1993/08/16 21:10:07 $";
  10 #endif /* not lint */
  11
  12 #include <sys/types.h>
  13
  14 #include "vi.h"
  15 #include "vcmd.h"
  16
  17 /*
  18  * v_right -- [count]' ', [count]l
  19  *      Move right by columns.
  20  *
  21  * Special case: the 'c' and 'd' commands can move past the end of line.
  22  */
  23 int
  24 v_right(sp, ep, vp, fm, tm, rp)
  25         SCR *sp;
  26         EXF *ep;
  27         VICMDARG *vp;
  28         MARK *fm, *tm, *rp;
  29 {
  30         recno_t lno;
  31         u_long cnt;
  32         size_t len;
  33
  34         if (file_gline(sp, ep, fm->lno, &len) == NULL) {
  35                 if (file_lline(sp, ep, &lno))
  36                         return (1);
  37                 if (lno == 0)
  38                         v_eol(sp, ep, NULL);
  39                 else
  40                         GETLINE_ERR(sp, fm->lno);
  41                 return (1);
  42         }
  43
  44         rp->lno = fm->lno;
  45         if (len == 0 || fm->cno == len - 1) {
  46                 if (F_ISSET(vp, VC_C | VC_D | VC_Y)) {
  47                         rp->cno = len;
  48                         return (0);
  49                 }
  50                 v_eol(sp, ep, NULL);
  51                 return (1);
  52         }
  53
  54         cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
  55         rp->cno = fm->cno + cnt;
  56         if (rp->cno > len - 1)
  57                 if (F_ISSET(vp, VC_C | VC_D | VC_Y))
  58                         rp->cno = len;
  59                 else
  60                         rp->cno = len - 1;
  61         return (0);
  62 }
  63
  64 /*
  65  * v_dollar -- [count]$
  66  *      Move to the last column.
  67  *
  68  *      One of places that you are allowed to move beyond the end of
  69  *      the line.
  70  */
  71 int
  72 v_dollar(sp, ep, vp, fm, tm, rp)
  73         SCR *sp;
  74         EXF *ep;
  75         VICMDARG *vp;
  76         MARK *fm, *tm, *rp;
  77 {
  78         recno_t lno;
  79         size_t len;
  80         u_long cnt;
  81
  82         /* A count moves down count - 1 rows, so, "3$" is the same as "2j$". */
  83         cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
  84         if (cnt != 1) {
  85                 --vp->count;
  86                 if (v_down(sp, ep, vp, fm, tm, rp))
  87                         return (1);
  88                 *fm = *rp;
  89         }
  90
  91         if (file_gline(sp, ep, fm->lno, &len) == NULL) {
  92                 if (file_lline(sp, ep, &lno))
  93                         return (1);
  94                 if (lno == 0)
  95                         v_eol(sp, ep, NULL);
  96                 else
  97                         GETLINE_ERR(sp, fm->lno);
  98                 return (1);
  99         }
 100
 101         if (len == 0) {
 102                 v_eol(sp, ep, NULL);
 103                 return (1);
 104         }
 105
 106         rp->lno = fm->lno;
 107         rp->cno = F_ISSET(vp, VC_C | VC_D | VC_Y) ? len : len - 1;
 108         return (0);
 109 }