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C/C++ Users Group Library 1996 July
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C-C++ Users Group Library July 1996.iso
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vol_400
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424_02
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ED-157
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buffer_app.c
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1993-09-10
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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 "buffer.h"
/******************************************************************************\
|Routine: buffer_append
|Callby: command copier killer output_file
|Purpose: Appends a record or a portion of a record to an existing buffer.
|Arguments:
| buf is the existing buffer.
| rec is the record containing the data to be appended.
| byt1,byt2 define the portion of the record that is to be appended.
\******************************************************************************/
void buffer_append(buf,rec,byt1,byt2)
register buf_ptr buf;
register rec_ptr rec;
register Int byt1,byt2;
{
rec_ptr new;
Int l;
new = (rec_ptr)imalloc(sizeof(rec_node));
if((l = byt2 - byt1) > 0)
{
new->data = (Char *)imalloc(l + 1);
memcpy(new->data,rec->data + byt1,l);
new->data[l] = '\0';
new->recflags = 1; /* it is a freeable buffer */
}
else
new->data = NULL;
new->length = l;
insq(new,buf->last);
}