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- /*
- * 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_split
- |Callby: insert
- |Purpose: Splits a record in two.
- |Arguments:
- | prec is the record to be split.
- | byt is the location of the split point. Everything from [byt] forward goes
- | to the new record.
- \******************************************************************************/
- void rec_split(prec,byt)
- rec_ptr *prec;
- Int byt;
- {
- rec_ptr rec,new;
- Int i;
-
- rec = *prec;
- new = (rec_ptr)imalloc(sizeof(rec_node));
- new->data = (Char *)imalloc(rec->length - byt + 1);
- new->recflags = 1; /* it is a freeable buffer */
- if((new->length = rec->length - byt) > 0)
- memcpy(new->data,&rec->data[byt],new->length);
- new->data[new->length] = '\0';
- if(rec == BASE)
- {
- insq(new,rec->prev); /* insert a blank record just before the [eob] */
- *prec = new; /* we be located at the new record, not [eob] */
- }
- else
- {
- for(i = 0;i < NMARK;i++)
- if(rec == MARKREC[i] && MARKBYT[i] >= byt)
- {
- MARKREC[i] = new;
- MARKBYT[i] -= byt;
- }
- if(rec == SELREC && SELBYT > byt)
- {
- SELREC = new;
- SELBYT -= byt;
- }
- rec_trim(prec,byt,rec->length); /* trim what follows byt in original rec */
- insq(new,*prec);
- }
- }
-
-