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/*
* Copyright (c) 2001-2002 The Trustees of Indiana University.
* All rights reserved.
* Copyright (c) 1998-2001 University of Notre Dame.
* All rights reserved.
* Copyright (c) 1994-1998 The Ohio State University.
* All rights reserved.
*
* This file is part of the LAM/MPI software package. For license
* information, see the LICENSE file in the top level directory of the
* LAM/MPI source distribution.
*
* $HEADER$
* Ohio Trollius
*
* $Id
*
* We are just putting our stamp on this for housekeeping reasons.
*/
/*
* This file is originally from dLibs 1.2 by Dale Schumacher et al.
* It was modified for Trollius by MB, 88/12.
* It was modified again for portability by GDB, 91/08.
* And yet again by JRV for LAM, 93/05.
*/
#include <errno.h>
#include <kreq.h>
#include <laminternal.h>
#include <tstdio.h>
/*
* external variables
*/
extern int _ioexit;
int
tfread(data, size, count, fp)
char *data;
int size;
int count;
TFILE *fp;
{
int n, m;
int f, c;
if (! _ioexit) {
if (atkexit (tfcloseall, (char *) 0) != 0)
return (-1);
_ioexit = 1;
}
f = (fp->_flag &= ~_TIORW);
n = count * size;
if(f & _TIODEV) /* device i/o */
{
for(m = 0; (m < n); ++m)
{
if((c = tfgetc(fp)) == EOF)
break;
*data++ = (char) c;
}
}
else /* file i/o */
{
tfflush(fp); /* re-sync file pointers */
m = lam_iomap_read(fp->_flag, fp->_file, data, n);
}
return((m > 0) ? (m / size) : (errno = m));
}
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