contrib/nvi2/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 #include <sys/types.h>
  13 #include <sys/queue.h>
  14 #include <sys/time.h>
  15
  16 #include <bitstring.h>
  17 #include <limits.h>
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 #include "../common/common.h"
  23
  24 /*
  25  * ex_copy -- :[line [,line]] co[py] line [flags]
  26  *      Copy selected lines.
  27  *
  28  * PUBLIC: int ex_copy(SCR *, EXCMD *);
  29  */
  30 int
  31 ex_copy(SCR *sp, EXCMD *cmdp)
  32 {
  33         CB cb = {{ 0 }};
  34         MARK fm1, fm2, m, tm;
  35         recno_t cnt;
  36         int rval;
  37
  38         rval = 0;
  39
  40         NEEDFILE(sp, cmdp);
  41
  42         /*
  43          * It's possible to copy things into the area that's being
  44          * copied, e.g. "2,5copy3" is legitimate.  Save the text to
  45          * a cut buffer.
  46          */
  47         fm1 = cmdp->addr1;
  48         fm2 = cmdp->addr2;
  49         TAILQ_INIT(cb.textq);
  50         for (cnt = fm1.lno; cnt <= fm2.lno; ++cnt)
  51                 if (cut_line(sp, cnt, 0, ENTIRE_LINE, &cb)) {
  52                         rval = 1;
  53                         goto err;
  54                 }
  55         cb.flags |= CB_LMODE;
  56
  57         /* Put the text into place. */
  58         tm.lno = cmdp->lineno;
  59         tm.cno = 0;
  60         if (put(sp, &cb, NULL, &tm, &m, 1))
  61                 rval = 1;
  62         else {
  63                 /*
  64                  * Copy puts the cursor on the last line copied.  The cursor
  65                  * returned by the put routine is the first line put, not the
  66                  * last, because that's the historic semantic of vi.
  67                  */
  68                 cnt = (fm2.lno - fm1.lno) + 1;
  69                 sp->lno = m.lno + (cnt - 1);
  70                 sp->cno = 0;
  71         }
  72 err:    text_lfree(cb.textq);
  73         return (rval);
  74 }
  75
  76 /*
  77  * ex_move -- :[line [,line]] mo[ve] line
  78  *      Move selected lines.
  79  *
  80  * PUBLIC: int ex_move(SCR *, EXCMD *);
  81  */
  82 int
  83 ex_move(SCR *sp, EXCMD *cmdp)
  84 {
  85         LMARK *lmp;
  86         MARK fm1, fm2;
  87         recno_t cnt, diff, fl, tl, mfl, mtl;
  88         size_t blen, len;
  89         int mark_reset;
  90         CHAR_T *bp;
  91         CHAR_T *p;
  92
  93         NEEDFILE(sp, cmdp);
  94
  95         /*
  96          * It's not possible to move things into the area that's being
  97          * moved.
  98          */
  99         fm1 = cmdp->addr1;
 100         fm2 = cmdp->addr2;
 101         if (cmdp->lineno >= fm1.lno && cmdp->lineno <= fm2.lno) {
 102                 msgq(sp, M_ERR, "139|Destination line is inside move range");
 103                 return (1);
 104         }
 105
 106         /*
 107          * Log the positions of any marks in the to-be-deleted lines.  This
 108          * has to work with the logging code.  What happens is that we log
 109          * the old mark positions, make the changes, then log the new mark
 110          * positions.  Then the marks end up in the right positions no matter
 111          * which way the log is traversed.
 112          *
 113          * XXX
 114          * Reset the MARK_USERSET flag so that the log can undo the mark.
 115          * This isn't very clean, and should probably be fixed.
 116          */
 117         fl = fm1.lno;
 118         tl = cmdp->lineno;
 119
 120         /* Log the old positions of the marks. */
 121         mark_reset = 0;
 122         SLIST_FOREACH(lmp, sp->ep->marks, q)
 123                 if (lmp->name != ABSMARK1 &&
 124                     lmp->lno >= fl && lmp->lno <= tl) {
 125                         mark_reset = 1;
 126                         F_CLR(lmp, MARK_USERSET);
 127                         (void)log_mark(sp, lmp);
 128                 }
 129
 130         /* Get memory for the copy. */
 131         GET_SPACE_RETW(sp, bp, blen, 256);
 132
 133         /* Move the lines. */
 134         diff = (fm2.lno - fm1.lno) + 1;
 135         if (tl > fl) {                          /* Destination > source. */
 136                 mfl = tl - diff;
 137                 mtl = tl;
 138                 for (cnt = diff; cnt--;) {
 139                         if (db_get(sp, fl, DBG_FATAL, &p, &len))
 140                                 return (1);
 141                         BINC_RETW(sp, bp, blen, len);
 142                         MEMCPY(bp, p, len);
 143                         if (db_append(sp, 1, tl, bp, len))
 144                                 return (1);
 145                         if (mark_reset)
 146                                 SLIST_FOREACH(lmp, sp->ep->marks, q)
 147                                         if (lmp->name != ABSMARK1 &&
 148                                             lmp->lno == fl)
 149                                                 lmp->lno = tl + 1;
 150                         if (db_delete(sp, fl))
 151                                 return (1);
 152                 }
 153         } else {                                /* Destination < source. */
 154                 mfl = tl;
 155                 mtl = tl + diff;
 156                 for (cnt = diff; cnt--;) {
 157                         if (db_get(sp, fl, DBG_FATAL, &p, &len))
 158                                 return (1);
 159                         BINC_RETW(sp, bp, blen, len);
 160                         MEMCPY(bp, p, len);
 161                         if (db_append(sp, 1, tl++, bp, len))
 162                                 return (1);
 163                         if (mark_reset)
 164                                 SLIST_FOREACH(lmp, sp->ep->marks, q)
 165                                         if (lmp->name != ABSMARK1 &&
 166                                             lmp->lno == fl)
 167                                                 lmp->lno = tl;
 168                         ++fl;
 169                         if (db_delete(sp, fl))
 170                                 return (1);
 171                 }
 172         }
 173         FREE_SPACEW(sp, bp, blen);
 174
 175         sp->lno = tl;                           /* Last line moved. */
 176         sp->cno = 0;
 177
 178         /* Log the new positions of the marks. */
 179         if (mark_reset)
 180                 SLIST_FOREACH(lmp, sp->ep->marks, q)
 181                         if (lmp->name != ABSMARK1 &&
 182                             lmp->lno >= mfl && lmp->lno <= mtl)
 183                                 (void)log_mark(sp, lmp);
 184
 185
 186         sp->rptlines[L_MOVED] += diff;
 187         return (0);
 188 }