1 /* stdio on a Mach device port.
2 Translates \n to \r on output.
4 Copyright (C) 1992 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public License as
9 published by the Free Software Foundation; either version 2 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If
19 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
20 Cambridge, MA 02139, USA. */
24 #include <device/device.h>
34 if (f->__buffer == NULL)
42 to_read = f->__bufsize;
47 if (err = device_read_inband ((device_t) cookie, 0, f->__target, to_read,
51 f->__bufp = f->__get_limit = f->__put_limit = f->__buffer;
56 if (f->__buffer == NULL)
57 return (unsigned char) c;
59 f->__get_limit = f->__buffer + nread;
60 f->__bufp = f->__buffer;
61 f->__put_limit = f->__buffer + (f->__mode.__write ? f->__bufsize : 0);
62 return (unsigned char *) *f->__bufp++;
66 output (FILE *f, int c)
72 if (f->__buffer == NULL)
76 char cc = (unsigned char) c;
80 if ((err = device_write_inband ((device_t) f->__cookie, 0,
81 f->__target, &cc, 1, &wrote)) ||
92 if (f->__put_limit == f->__buffer)
94 f->__put_limit = f->__buffer + f->__bufsize;
95 f->__bufp = f->__buffer;
98 *f->__bufp++ = (unsigned char) c;
103 to_write = f->__bufp - f->__buffer;
107 char *p2 = memchr (p, '\n', to_write);
115 to_write = f->__bufp - f->__buffer;
120 if (err = device_write_inband ((device_t) f->__cookie, 0, f->__target,
121 p, to_write, &wrote))
129 f->__target += wrote;
132 f->__bufp = f->__buffer;
134 if (c != EOF && !ferror (f))
136 if (f->__linebuf && (unsigned char) c == '\n')
138 static const char nl = '\r';
139 if ((err = device_write_inband ((device_t) f->__cookie, 0,
140 f->__target, &nl, 1, &wrote)) ||
150 *f->__bufp++ = (unsigned char) c;
155 mach_open_devstream (device_t dev, const char *mode)
157 FILE *stream = fopencookie (dev, mode, __default_io_functions);
161 stream->__room_funcs.__input = input;
162 stream->__room_funcs.__output = output;
163 stream->__io_funcs.__close = device_close;