BSD 4_3 release

[unix-history] / usr / src / lib / libc / stdio / setbuffer.c

/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)setbuffer.c 5.2 (Berkeley) 3/9/86";
#endif LIBC_SCCS and not lint

#include        <stdio.h>

setbuffer(iop, buf, size)
       register FILE *iop;
       char *buf;
       int size;
{
       if (iop->_base != NULL && iop->_flag&_IOMYBUF)
               free(iop->_base);
       iop->_flag &= ~(_IOMYBUF|_IONBF|_IOLBF);
       if ((iop->_base = buf) == NULL) {
               iop->_flag |= _IONBF;
               iop->_bufsiz = NULL;
       } else {
               iop->_ptr = iop->_base;
               iop->_bufsiz = size;
       }
       iop->_cnt = 0;
}

/*
* set line buffering for either stdout or stderr
*/
setlinebuf(iop)
       register FILE *iop;
{
       char *buf;
       extern char *malloc();

       fflush(iop);
       setbuffer(iop, NULL, 0);
       buf = malloc(BUFSIZ);
       if (buf != NULL) {
               setbuffer(iop, buf, BUFSIZ);
               iop->_flag |= _IOLBF|_IOMYBUF;
       }
}