home *** CD-ROM | disk | FTP | other *** search
- /*
- * Copyright (C) 1992 by Rush Record (rhr@clio.rice.edu)
- *
- * This file is part of ED.
- *
- * ED is free software; you can redistribute it and/or modify it under the terms
- * of the GNU General Public License as published by the Free Software Foundation.
- *
- * ED is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
- * PARTICULAR PURPOSE. See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with ED
- * (see the file COPYING). If not, write to the Free Software Foundation, 675
- * Mass Ave, Cambridge, MA 02139, USA.
- */
- #include "opsys.h"
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
-
- #include "memory.h"
- #include "rec.h"
- #include "window.h"
- #include "ed_dec.h"
-
- /******************************************************************************\
- |Routine: rec_merge
- |Callby: copier killer
- |Purpose: Handles merging of records (deletion of "separators").
- |Arguments:
- | prec is the record that is to be merged with its successor.
- \******************************************************************************/
- void rec_merge(prec)
- rec_ptr *prec;
- {
- register rec_ptr rec,next,new,pred;
- register Int l1,l2,i;
-
- rec = *prec;
- if((next = rec->next) == BASE)
- {
- if(!rec->length)
- {
- remq(rec);
- fixup_recs(rec,BASE);
- if(rec == SELREC)
- {
- SELREC = BASE;
- SELBYT = 0;
- }
- for(i = 0;i < NMARK;i++)
- if(rec == MARKREC[i])
- {
- MARKREC[i] = BASE;
- MARKBYT[i] = 0;
- }
- }
- return;
- }
- new = (rec_ptr)imalloc(sizeof(rec_node));
- l1 = rec->length;
- l2 = next->length;
- new->data = (Char *)imalloc(l1 + l2 + 1);
- new->recflags = 1; /* it is a freeable buffer */
- if(l1 > 0)
- memcpy(new->data,rec->data,l1);
- if(l2 > 0)
- memcpy(&new->data[l1],next->data,l2);
- new->length = l1 + l2;
- new->data[l1 + l2] = 0;
- pred = rec->prev;
- remq(rec);
- if(rec->data && (rec->recflags & 1))
- ifree(rec->data);
- ifree(rec);
- remq(next);
- if(next->data && (next->recflags & 1))
- ifree(next->data);
- ifree(next);
- fixup_recs(rec,new);
- fixup_recs(next,new);
- if(rec == SELREC || next == SELREC)
- {
- if(next == SELREC)
- SELBYT += l1;
- SELREC = new;
- }
- for(i = 0;i < NMARK;i++)
- if(rec == MARKREC[i] || next == MARKREC[i])
- {
- if(next == MARKREC[i])
- MARKBYT[i] += l1;
- MARKREC[i] = new;
- }
- insq(new,pred);
- *prec = new;
- }
-
-