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 10.14 2000/07/15 20:26:35 skimo Exp $ (Berkeley) $Date: 2000/07/15 20:26:35 $";
  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         db_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         db_recno_t cnt, diff, fl, tl, mfl, mtl;
  96         size_t blen, len;
  97         int mark_reset;
  98         CHAR_T *bp;
  99         CHAR_T *p;
 100
 101         NEEDFILE(sp, cmdp);
 102
 103         /*
 104          * It's not possible to move things into the area that's being
 105          * moved.
 106          */
 107         fm1 = cmdp->addr1;
 108         fm2 = cmdp->addr2;
 109         if (cmdp->lineno >= fm1.lno && cmdp->lineno <= fm2.lno) {
 110                 msgq(sp, M_ERR, "139|Destination line is inside move range");
 111                 return (1);
 112         }
 113
 114         /*
 115          * Log the positions of any marks in the to-be-deleted lines.  This
 116          * has to work with the logging code.  What happens is that we log
 117          * the old mark positions, make the changes, then log the new mark
 118          * positions.  Then the marks end up in the right positions no matter
 119          * which way the log is traversed.
 120          *
 121          * XXX
 122          * Reset the MARK_USERSET flag so that the log can undo the mark.
 123          * This isn't very clean, and should probably be fixed.
 124          */
 125         fl = fm1.lno;
 126         tl = cmdp->lineno;
 127
 128         /* Log the old positions of the marks. */
 129         mark_reset = 0;
 130         for (lmp = sp->ep->marks.lh_first; lmp != NULL; lmp = lmp->q.le_next)
 131                 if (lmp->name != ABSMARK1 &&
 132                     lmp->lno >= fl && lmp->lno <= tl) {
 133                         mark_reset = 1;
 134                         F_CLR(lmp, MARK_USERSET);
 135                         (void)log_mark(sp, lmp);
 136                 }
 137
 138         /* Get memory for the copy. */
 139         GET_SPACE_RETW(sp, bp, blen, 256);
 140
 141         /* Move the lines. */
 142         diff = (fm2.lno - fm1.lno) + 1;
 143         if (tl > fl) {                          /* Destination > source. */
 144                 mfl = tl - diff;
 145                 mtl = tl;
 146                 for (cnt = diff; cnt--;) {
 147                         if (db_get(sp, fl, DBG_FATAL, &p, &len))
 148                                 return (1);
 149                         BINC_RETW(sp, bp, blen, len);
 150                         MEMCPYW(bp, p, len);
 151                         if (db_append(sp, 1, tl, bp, len))
 152                                 return (1);
 153                         if (mark_reset)
 154                                 for (lmp = sp->ep->marks.lh_first;
 155                                     lmp != NULL; lmp = lmp->q.le_next)
 156                                         if (lmp->name != ABSMARK1 &&
 157                                             lmp->lno == fl)
 158                                                 lmp->lno = tl + 1;
 159                         if (db_delete(sp, fl))
 160                                 return (1);
 161                 }
 162         } else {                                /* Destination < source. */
 163                 mfl = tl;
 164                 mtl = tl + diff;
 165                 for (cnt = diff; cnt--;) {
 166                         if (db_get(sp, fl, DBG_FATAL, &p, &len))
 167                                 return (1);
 168                         BINC_RETW(sp, bp, blen, len);
 169                         MEMCPYW(bp, p, len);
 170                         if (db_append(sp, 1, tl++, bp, len))
 171                                 return (1);
 172                         if (mark_reset)
 173                                 for (lmp = sp->ep->marks.lh_first;
 174                                     lmp != NULL; lmp = lmp->q.le_next)
 175                                         if (lmp->name != ABSMARK1 &&
 176                                             lmp->lno == fl)
 177                                                 lmp->lno = tl;
 178                         ++fl;
 179                         if (db_delete(sp, fl))
 180                                 return (1);
 181                 }
 182         }
 183         FREE_SPACEW(sp, bp, blen);
 184
 185         sp->lno = tl;                           /* Last line moved. */
 186         sp->cno = 0;
 187
 188         /* Log the new positions of the marks. */
 189         if (mark_reset)
 190                 for (lmp = sp->ep->marks.lh_first;
 191                     lmp != NULL; lmp = lmp->q.le_next)
 192                         if (lmp->name != ABSMARK1 &&
 193                             lmp->lno >= mfl && lmp->lno <= mtl)
 194                                 (void)log_mark(sp, lmp);
 195
 196
 197         sp->rptlines[L_MOVED] += diff;
 198         return (0);
 199 }