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/*
* Copyright (c) 1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND CARNEGIE MELLON UNIVERSITY
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT
* SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Users of this software agree to return to Carnegie Mellon any
* improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* Export of this software is permitted only after complying with the
* regulations of the U.S. Deptartment of Commerce relating to the
* Export of Technical Data.
*/
/* ffilecopy -- very fast buffered file copy
*
* Usage: i = ffilecopy (here,there)
* int i;
* FILE *here, *there;
*
* Ffilecopy is a very fast routine to copy the rest of a buffered
* input file to a buffered output file. Here and there are open
* buffers for reading and writing (respectively); ffilecopy
* performs a file-copy faster than you should expect to do it
* yourself. Ffilecopy returns 0 if everything was OK; EOF if
* there was any error. Normally, the input file will be left in
* EOF state (feof(here) will return TRUE), and the output file will be
* flushed (i.e. all data on the file rather in the core buffer).
* It is not necessary to flush the output file before ffilecopy.
*
* HISTORY
* $Log: ffilecopy.c,v $
* Revision 1.2 90/12/11 17:52:41 mja
* Add copyright/disclaimer for distribution.
*
* 20-Nov-79 Steven Shafer (sas) at Carnegie-Mellon University
* Created for VAX.
*
*/
#include <stdio.h>
int filecopy();
int ffilecopy (here,there)
FILE *here, *there;
{
register int i, herefile, therefile;
herefile = fileno(here);
therefile = fileno(there);
if (fflush (there) == EOF) /* flush pending output */
return (EOF);
if ((here->_cnt) > 0) { /* flush buffered input */
i = write (therefile, here->_ptr, here->_cnt);
if (i != here->_cnt) return (EOF);
here->_ptr = here->_base;
here->_cnt = 0;
}
i = filecopy (herefile, therefile); /* fast file copy */
if (i < 0) return (EOF);
(here->_flag) |= _IOEOF; /* indicate EOF */
return (0);
}
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