contrib/nvi/ex/ex_move.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: ex_move.c,v 10.16 2012/02/11 15:52:33 zy Exp $";
  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 <limits.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "../common/common.h"
  27
  28 /*
  29  * ex_copy -- :[line [,line]] co[py] line [flags]
  30  *      Copy selected lines.
  31  *
  32  * PUBLIC: int ex_copy __P((SCR *, EXCMD *));
  33  */
  34 int
  35 ex_copy(SCR *sp, EXCMD *cmdp)
  36 {
  37         CB cb = {{ 0 }};
  38         MARK fm1, fm2, m, tm;
  39         recno_t cnt;
  40         int rval;
  41
  42         rval = 0;
  43
  44         NEEDFILE(sp, cmdp);
  45
  46         /*
  47          * It's possible to copy things into the area that's being
  48          * copied, e.g. "2,5copy3" is legitimate.  Save the text to
  49          * a cut buffer.
  50          */
  51         fm1 = cmdp->addr1;
  52         fm2 = cmdp->addr2;
  53         TAILQ_INIT(cb.textq);
  54         for (cnt = fm1.lno; cnt <= fm2.lno; ++cnt)
  55                 if (cut_line(sp, cnt, 0, ENTIRE_LINE, &cb)) {
  56                         rval = 1;
  57                         goto err;
  58                 }
  59         cb.flags |= CB_LMODE;
  60
  61         /* Put the text into place. */
  62         tm.lno = cmdp->lineno;
  63         tm.cno = 0;
  64         if (put(sp, &cb, NULL, &tm, &m, 1))
  65                 rval = 1;
  66         else {
  67                 /*
  68                  * Copy puts the cursor on the last line copied.  The cursor
  69                  * returned by the put routine is the first line put, not the
  70                  * last, because that's the historic semantic of vi.
  71                  */
  72                 cnt = (fm2.lno - fm1.lno) + 1;
  73                 sp->lno = m.lno + (cnt - 1);
  74                 sp->cno = 0;
  75         }
  76 err:    text_lfree(cb.textq);
  77         return (rval);
  78 }
  79
  80 /*
  81  * ex_move -- :[line [,line]] mo[ve] line
  82  *      Move selected lines.
  83  *
  84  * PUBLIC: int ex_move __P((SCR *, EXCMD *));
  85  */
  86 int
  87 ex_move(SCR *sp, EXCMD *cmdp)
  88 {
  89         LMARK *lmp;
  90         MARK fm1, fm2;
  91         recno_t cnt, diff, fl, tl, mfl, mtl;
  92         size_t blen, len;
  93         int mark_reset;
  94         CHAR_T *bp;
  95         CHAR_T *p;
  96
  97         NEEDFILE(sp, cmdp);
  98
  99         /*
 100          * It's not possible to move things into the area that's being
 101          * moved.
 102          */
 103         fm1 = cmdp->addr1;
 104         fm2 = cmdp->addr2;
 105         if (cmdp->lineno >= fm1.lno && cmdp->lineno <= fm2.lno) {
 106                 msgq(sp, M_ERR, "139|Destination line is inside move range");
 107                 return (1);
 108         }
 109
 110         /*
 111          * Log the positions of any marks in the to-be-deleted lines.  This
 112          * has to work with the logging code.  What happens is that we log
 113          * the old mark positions, make the changes, then log the new mark
 114          * positions.  Then the marks end up in the right positions no matter
 115          * which way the log is traversed.
 116          *
 117          * XXX
 118          * Reset the MARK_USERSET flag so that the log can undo the mark.
 119          * This isn't very clean, and should probably be fixed.
 120          */
 121         fl = fm1.lno;
 122         tl = cmdp->lineno;
 123
 124         /* Log the old positions of the marks. */
 125         mark_reset = 0;
 126         SLIST_FOREACH(lmp, sp->ep->marks, q)
 127                 if (lmp->name != ABSMARK1 &&
 128                     lmp->lno >= fl && lmp->lno <= tl) {
 129                         mark_reset = 1;
 130                         F_CLR(lmp, MARK_USERSET);
 131                         (void)log_mark(sp, lmp);
 132                 }
 133
 134         /* Get memory for the copy. */
 135         GET_SPACE_RETW(sp, bp, blen, 256);
 136
 137         /* Move the lines. */
 138         diff = (fm2.lno - fm1.lno) + 1;
 139         if (tl > fl) {                          /* Destination > source. */
 140                 mfl = tl - diff;
 141                 mtl = tl;
 142                 for (cnt = diff; cnt--;) {
 143                         if (db_get(sp, fl, DBG_FATAL, &p, &len))
 144                                 return (1);
 145                         BINC_RETW(sp, bp, blen, len);
 146                         MEMCPY(bp, p, len);
 147                         if (db_append(sp, 1, tl, bp, len))
 148                                 return (1);
 149                         if (mark_reset)
 150                                 SLIST_FOREACH(lmp, sp->ep->marks, q)
 151                                         if (lmp->name != ABSMARK1 &&
 152                                             lmp->lno == fl)
 153                                                 lmp->lno = tl + 1;
 154                         if (db_delete(sp, fl))
 155                                 return (1);
 156                 }
 157         } else {                                /* Destination < source. */
 158                 mfl = tl;
 159                 mtl = tl + diff;
 160                 for (cnt = diff; cnt--;) {
 161                         if (db_get(sp, fl, DBG_FATAL, &p, &len))
 162                                 return (1);
 163                         BINC_RETW(sp, bp, blen, len);
 164                         MEMCPY(bp, p, len);
 165                         if (db_append(sp, 1, tl++, bp, len))
 166                                 return (1);
 167                         if (mark_reset)
 168                                 SLIST_FOREACH(lmp, sp->ep->marks, q)
 169                                         if (lmp->name != ABSMARK1 &&
 170                                             lmp->lno == fl)
 171                                                 lmp->lno = tl;
 172                         ++fl;
 173                         if (db_delete(sp, fl))
 174                                 return (1);
 175                 }
 176         }
 177         FREE_SPACEW(sp, bp, blen);
 178
 179         sp->lno = tl;                           /* Last line moved. */
 180         sp->cno = 0;
 181
 182         /* Log the new positions of the marks. */
 183         if (mark_reset)
 184                 SLIST_FOREACH(lmp, sp->ep->marks, q)
 185                         if (lmp->name != ABSMARK1 &&
 186                             lmp->lno >= mfl && lmp->lno <= mtl)
 187                                 (void)log_mark(sp, lmp);
 188
 189
 190         sp->rptlines[L_MOVED] += diff;
 191         return (0);
 192 }