1 /* stdio on a Mach device port.
2 Translates \n to \r\n on output, echos input.
4 Copyright (C) 1992, 1993, 1994 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 mach_msg_type_number_t nread;
37 if (f->__buffer == NULL)
45 to_read = f->__bufsize;
51 err = device_read_inband ((device_t) f->__cookie, 0, f->__target,
52 to_read, buffer, &nread);
57 f->__bufp = f->__get_limit = f->__put_limit = f->__buffer;
63 err = device_write_inband ((device_t) f->__cookie, 0, f->__target,
64 buffer, nread, (int *) &to_read);
66 if (f->__buffer == NULL)
67 return (unsigned char) c;
69 f->__get_limit = f->__buffer + nread;
70 f->__bufp = f->__buffer;
71 f->__put_limit = f->__buffer + (f->__mode.__write ? f->__bufsize : 0);
72 return (unsigned char) *f->__bufp++;
78 output (FILE *f, int c)
80 inline void write_some (const char *p, size_t to_write)
86 if (err = device_write ((device_t) f->__cookie, 0,
87 f->__target, (char *)p,
100 if (f->__buffer != NULL)
102 if (f->__put_limit == f->__buffer)
104 /* Prime the stream for writing. */
105 f->__put_limit = f->__buffer + f->__bufsize;
106 f->__bufp = f->__buffer;
109 *f->__bufp++ = (unsigned char) c;
115 /* Write out the buffer. */
117 write_some (f->__buffer, f->__bufp - f->__buffer);
119 f->__bufp = f->__buffer;
122 if (c != EOF && !ferror (f))
124 if (f->__linebuf && (unsigned char) c == '\n')
126 static const char nl = '\n';
130 *f->__bufp++ = (unsigned char) c;
137 output (FILE *f, int c)
139 void write_some (const char *p, size_t to_write)
145 if (err = device_write_inband ((device_t) f->__cookie, 0,
146 f->__target, p, to_write, &wrote))
154 f->__target += wrote;
157 void write_crlf (void)
159 static const char crlf[] = "\r\n";
160 write_some (crlf, 2);
163 if (f->__buffer == NULL)
165 /* The stream is unbuffered. */
171 char cc = (unsigned char) c;
178 if (f->__put_limit == f->__buffer)
180 /* Prime the stream for writing. */
181 f->__put_limit = f->__buffer + f->__bufsize;
182 f->__bufp = f->__buffer;
185 *f->__bufp++ = (unsigned char) c;
191 /* Search for newlines (LFs) in the buffer. */
193 char *start = f->__buffer, *p = start;
195 while (!ferror (f) && (p = memchr (p, '\n', f->__bufp - start)))
197 /* Found one. Replace it with a CR and write out through that CR. */
200 write_some (start, p + 1 - start);
202 /* Change it back to an LF; the next iteration will write it out
203 first thing. Start the next searching iteration one char later. */
209 /* Write the remainder of the buffer. */
212 write_some (start, f->__bufp - start);
215 f->__bufp = f->__buffer;
217 if (c != EOF && !ferror (f))
219 if (f->__linebuf && (unsigned char) c == '\n')
222 *f->__bufp++ = (unsigned char) c;
227 dealloc_ref (void *cookie)
229 if (mach_port_deallocate (mach_task_self (), (mach_port_t) cookie))
239 mach_open_devstream (mach_port_t dev, const char *mode)
243 if (mach_port_mod_refs (mach_task_self (), dev, MACH_PORT_RIGHT_SEND, 1))
249 stream = fopencookie ((void *) dev, mode, __default_io_functions);
252 mach_port_deallocate (mach_task_self (), dev);
256 stream->__room_funcs.__input = input;
257 stream->__room_funcs.__output = output;
258 stream->__io_funcs.__close = dealloc_ref;
259 stream->__io_funcs.__seek = NULL; /* Cannot seek. */
260 stream->__io_funcs.__fileno = NULL; /* No corresponding POSIX.1 fd. */