75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the Kungliga Tekniska
|
|
* Högskolan and its contributors.
|
|
*
|
|
* 4. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "common.h"
|
|
#include <stdio.h>
|
|
#include <err.h>
|
|
#include "roken.h"
|
|
|
|
RCSID("$Id: buffer.c,v 1.2 1997/12/14 23:51:45 assar Exp $");
|
|
|
|
/*
|
|
* Allocate a buffer enough to handle st->st_blksize, if
|
|
* there is such a field, otherwise BUFSIZ.
|
|
*/
|
|
|
|
void *
|
|
alloc_buffer (void *oldbuf, size_t *sz, struct stat *st)
|
|
{
|
|
size_t new_sz;
|
|
|
|
new_sz = BUFSIZ;
|
|
#ifdef HAVE_ST_BLKSIZE
|
|
if (st)
|
|
new_sz = max(BUFSIZ, st->st_blksize);
|
|
#endif
|
|
if(new_sz > *sz) {
|
|
if (oldbuf)
|
|
free (oldbuf);
|
|
oldbuf = malloc (new_sz);
|
|
if (oldbuf == NULL) {
|
|
warn ("malloc");
|
|
*sz = 0;
|
|
return NULL;
|
|
}
|
|
*sz = new_sz;
|
|
}
|
|
return oldbuf;
|
|
}
|
|
|