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 10.10 1996/09/15 15:59:19 bostic Exp $ (Berkeley) $Date: 1996/09/15 15:59:19 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18
  19 #include <bitstring.h>
  20 #include <limits.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "../common/common.h"
  26
  27 /*
  28  * ex_copy -- :[line [,line]] co[py] line [flags]
  29  *      Copy selected lines.
  30  *
  31  * PUBLIC: int ex_copy __P((SCR *, EXCMD *));
  32  */
  33 int
  34 ex_copy(sp, cmdp)
  35         SCR *sp;
  36         EXCMD *cmdp;
  37 {
  38         CB cb;
  39         MARK fm1, fm2, m, tm;
  40         recno_t cnt;
  41         int rval;
  42
  43         rval = 0;
  44
  45         NEEDFILE(sp, cmdp);
  46
  47         /*
  48          * It's possible to copy things into the area that's being
  49          * copied, e.g. "2,5copy3" is legitimate.  Save the text to
  50          * a cut buffer.
  51          */
  52         fm1 = cmdp->addr1;
  53         fm2 = cmdp->addr2;
  54         memset(&cb, 0, sizeof(cb));
  55         CIRCLEQ_INIT(&cb.textq);
  56         for (cnt = fm1.lno; cnt <= fm2.lno; ++cnt)
  57                 if (cut_line(sp, cnt, 0, 0, &cb)) {
  58                         rval = 1;
  59                         goto err;
  60                 }
  61         cb.flags |= CB_LMODE;
  62
  63         /* Put the text into place. */
  64         tm.lno = cmdp->lineno;
  65         tm.cno = 0;
  66         if (put(sp, &cb, NULL, &tm, &m, 1))
  67                 rval = 1;
  68         else {
  69                 /*
  70                  * Copy puts the cursor on the last line copied.  The cursor
  71                  * returned by the put routine is the first line put, not the
  72                  * last, because that's the historic semantic of vi.
  73                  */
  74                 cnt = (fm2.lno - fm1.lno) + 1;
  75                 sp->lno = m.lno + (cnt - 1);
  76                 sp->cno = 0;
  77         }
  78 err:    text_lfree(&cb.textq);
  79         return (rval);
  80 }
  81
  82 /*
  83  * ex_move -- :[line [,line]] mo[ve] line
  84  *      Move selected lines.
  85  *
  86  * PUBLIC: int ex_move __P((SCR *, EXCMD *));
  87  */
  88 int
  89 ex_move(sp, cmdp)
  90         SCR *sp;
  91         EXCMD *cmdp;
  92 {
  93         LMARK *lmp;
  94         MARK fm1, fm2;
  95         recno_t cnt, diff, fl, tl, mfl, mtl;
  96         size_t blen, len;
  97         int mark_reset;
  98         char *bp, *p;
  99
 100         NEEDFILE(sp, cmdp);
 101
 102         /*
 103          * It's not possible to move things into the area that's being
 104          * moved.
 105          */
 106         fm1 = cmdp->addr1;
 107         fm2 = cmdp->addr2;
 108         if (cmdp->lineno >= fm1.lno && cmdp->lineno <= fm2.lno) {
 109                 msgq(sp, M_ERR, "139|Destination line is inside move range");
 110                 return (1);
 111         }
 112
 113         /*
 114          * Log the positions of any marks in the to-be-deleted lines.  This
 115          * has to work with the logging code.  What happens is that we log
 116          * the old mark positions, make the changes, then log the new mark
 117          * positions.  Then the marks end up in the right positions no matter
 118          * which way the log is traversed.
 119          *
 120          * XXX
 121          * Reset the MARK_USERSET flag so that the log can undo the mark.
 122          * This isn't very clean, and should probably be fixed.
 123          */
 124         fl = fm1.lno;
 125         tl = cmdp->lineno;
 126
 127         /* Log the old positions of the marks. */
 128         mark_reset = 0;
 129         for (lmp = sp->ep->marks.lh_first; lmp != NULL; lmp = lmp->q.le_next)
 130                 if (lmp->name != ABSMARK1 &&
 131                     lmp->lno >= fl && lmp->lno <= tl) {
 132                         mark_reset = 1;
 133                         F_CLR(lmp, MARK_USERSET);
 134                         (void)log_mark(sp, lmp);
 135                 }
 136
 137         /* Get memory for the copy. */
 138         GET_SPACE_RET(sp, bp, blen, 256);
 139
 140         /* Move the lines. */
 141         diff = (fm2.lno - fm1.lno) + 1;
 142         if (tl > fl) {                          /* Destination > source. */
 143                 mfl = tl - diff;
 144                 mtl = tl;
 145                 for (cnt = diff; cnt--;) {
 146                         if (db_get(sp, fl, DBG_FATAL, &p, &len))
 147                                 return (1);
 148                         BINC_RET(sp, bp, blen, len);
 149                         memcpy(bp, p, len);
 150                         if (db_append(sp, 1, tl, bp, len))
 151                                 return (1);
 152                         if (mark_reset)
 153                                 for (lmp = sp->ep->marks.lh_first;
 154                                     lmp != NULL; lmp = lmp->q.le_next)
 155                                         if (lmp->name != ABSMARK1 &&
 156                                             lmp->lno == fl)
 157                                                 lmp->lno = tl + 1;
 158                         if (db_delete(sp, fl))
 159                                 return (1);
 160                 }
 161         } else {                                /* Destination < source. */
 162                 mfl = tl;
 163                 mtl = tl + diff;
 164                 for (cnt = diff; cnt--;) {
 165                         if (db_get(sp, fl, DBG_FATAL, &p, &len))
 166                                 return (1);
 167                         BINC_RET(sp, bp, blen, len);
 168                         memcpy(bp, p, len);
 169                         if (db_append(sp, 1, tl++, bp, len))
 170                                 return (1);
 171                         if (mark_reset)
 172                                 for (lmp = sp->ep->marks.lh_first;
 173                                     lmp != NULL; lmp = lmp->q.le_next)
 174                                         if (lmp->name != ABSMARK1 &&
 175                                             lmp->lno == fl)
 176                                                 lmp->lno = tl;
 177                         ++fl;
 178                         if (db_delete(sp, fl))
 179                                 return (1);
 180                 }
 181         }
 182         FREE_SPACE(sp, bp, blen);
 183
 184         sp->lno = tl;                           /* Last line moved. */
 185         sp->cno = 0;
 186
 187         /* Log the new positions of the marks. */
 188         if (mark_reset)
 189                 for (lmp = sp->ep->marks.lh_first;
 190                     lmp != NULL; lmp = lmp->q.le_next)
 191                         if (lmp->name != ABSMARK1 &&
 192                             lmp->lno >= mfl && lmp->lno <= mtl)
 193                                 (void)log_mark(sp, lmp);
 194
 195
 196         sp->rptlines[L_MOVED] += diff;
 197         return (0);
 198 }