/* stdio on a Mach device port.
Translates \n to \r\n on output, echos and translates \r to \n on input.
- Copyright (C) 1992, 1993, 1994, 1996, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1992-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <mach.h>
#include <device/device.h>
#include <errno.h>
#include <string.h>
-
-static int
-input (FILE *f)
-{
- kern_return_t err;
- char *buffer;
- size_t to_read;
- mach_msg_type_number_t nread;
- char c;
-
- if (f->__buffer == NULL)
- {
- buffer = &c;
- to_read = 1;
- }
- else
- {
- buffer = f->__buffer;
- to_read = f->__bufsize;
- }
-
- f->__eof = 0;
-
- nread = to_read;
- err = device_read_inband ((device_t) f->__cookie, 0, f->__target,
- to_read, buffer, &nread);
-
- if (err)
- {
- f->__error = 1;
- f->__bufp = f->__get_limit = f->__put_limit = f->__buffer;
- errno = err;
- return EOF;
- }
-
- /* Echo it back. */
- err = device_write_inband ((device_t) f->__cookie, 0, f->__target,
- buffer, nread, (int *) &to_read);
-
- /* Translate LF to CR. */
- {
- char *p;
- for (p = memchr (buffer, '\r', nread); p;
- p = memchr (p + 1, '\r', (buffer + nread) - (p + 1)))
- *p = '\n';
- }
-
- if (f->__buffer == NULL)
- return (unsigned char) c;
-
- f->__get_limit = f->__buffer + nread;
- f->__bufp = f->__buffer;
- f->__put_limit = f->__buffer + (f->__mode.__write ? f->__bufsize : 0);
- return (unsigned char) *f->__bufp++;
-}
+#include <libioP.h>
-#if 0
-static void
-output (FILE *f, int c)
+static ssize_t
+devstream_write (void *cookie, const char *buffer, size_t n)
{
- inline void write_some (const char *p, size_t to_write)
- {
- kern_return_t err;
- int wrote;
- while (to_write > 0)
- {
- if (err = device_write ((device_t) f->__cookie, 0,
- f->__target, (char *)p,
- to_write, &wrote))
- {
- errno = err;
- f->__error = 1;
- break;
- }
- p += wrote;
- to_write -= wrote;
- f->__target += wrote;
- }
- }
+ const device_t dev = (device_t) cookie;
- if (f->__buffer != NULL)
- {
- if (f->__put_limit == f->__buffer)
- {
- /* Prime the stream for writing. */
- f->__put_limit = f->__buffer + f->__bufsize;
- f->__bufp = f->__buffer;
- if (c != EOF)
- {
- *f->__bufp++ = (unsigned char) c;
- c = EOF;
- }
- }
-
-
- /* Write out the buffer. */
-
- write_some (f->__buffer, f->__bufp - f->__buffer);
-
- f->__bufp = f->__buffer;
- }
-
- if (c != EOF && !ferror (f))
- {
- if (f->__linebuf && (unsigned char) c == '\n')
- {
- static const char nl = '\n';
- write_some (&nl, 1);
- }
- else
- *f->__bufp++ = (unsigned char) c;
- }
-}
-#endif
-
-
-static void
-output (FILE *f, int c)
-{
- void write_some (const char *p, size_t to_write)
+ int write_some (const char *p, size_t to_write)
{
kern_return_t err;
int wrote;
if (thiswrite > IO_INBAND_MAX)
thiswrite = IO_INBAND_MAX;
- if (err = device_write_inband ((device_t) f->__cookie, 0,
- f->__target, p, thiswrite, &wrote))
+ if (err = device_write_inband (dev, 0, 0, p, thiswrite, &wrote))
{
errno = err;
- f->__error = 1;
- break;
+ return 0;
}
p += wrote;
to_write -= wrote;
- f->__target += wrote;
}
+ return 1;
}
- void write_crlf (void)
+ int write_crlf (void)
{
static const char crlf[] = "\r\n";
- write_some (crlf, 2);
+ return write_some (crlf, 2);
}
- if (f->__buffer == NULL)
- {
- /* The stream is unbuffered. */
+ /* Search for newlines (LFs) in the buffer. */
- if (c == '\n')
- write_crlf ();
- else if (c != EOF)
- {
- char cc = (unsigned char) c;
- write_some (&cc, 1);
- }
-
- return;
- }
-
- if (f->__put_limit == f->__buffer)
+ const char *start = buffer, *p;
+ while ((p = memchr (start, '\n', n)) != NULL)
{
- /* Prime the stream for writing. */
- f->__put_limit = f->__buffer + f->__bufsize;
- f->__bufp = f->__buffer;
- if (c != EOF)
- {
- *f->__bufp++ = (unsigned char) c;
- c = EOF;
- }
- }
-
- {
- /* Search for newlines (LFs) in the buffer. */
+ /* Found one. Write out through the preceding character,
+ and then write a CR/LF pair. */
- char *start = f->__buffer, *p = start;
+ if ((p > start && !write_some (start, p - start))
+ || !write_crlf ())
+ return (start - buffer) ?: -1;
- while (!ferror (f) && (p = memchr (p, '\n', f->__bufp - start)))
- {
- /* Found one. Replace it with a CR and write out through that CR. */
+ n -= p + 1 - start;
+ start = p + 1;
+ }
- *p = '\r';
- write_some (start, p + 1 - start);
+ /* Write the remainder of the buffer. */
+ if (write_some (start, n))
+ start += n;
+ return (start - buffer) ?: -1;
+}
- /* Change it back to an LF; the next iteration will write it out
- first thing. Start the next searching iteration one char later. */
+static ssize_t
+devstream_read (void *cookie, char *buffer, size_t to_read)
+{
+ const device_t dev = (device_t) cookie;
- start = p;
- *p++ = '\n';
- }
+ kern_return_t err;
+ mach_msg_type_number_t nread = to_read;
- /* Write the remainder of the buffer. */
+ err = device_read_inband (dev, 0, 0, to_read, buffer, &nread);
+ if (err)
+ {
+ errno = err;
+ return -1;
+ }
- if (!ferror (f))
- write_some (start, f->__bufp - start);
+ /* Translate CR to LF. */
+ {
+ char *p;
+ for (p = memchr (buffer, '\r', nread); p;
+ p = memchr (p + 1, '\r', (buffer + nread) - (p + 1)))
+ *p = '\n';
}
- f->__bufp = f->__buffer;
+ /* Echo back what we read. */
+ (void) devstream_write (cookie, buffer, nread);
- if (c != EOF && !ferror (f))
- {
- if (f->__linebuf && (unsigned char) c == '\n')
- write_crlf ();
- else
- *f->__bufp++ = (unsigned char) c;
- }
+ return nread;
}
static int
dealloc_ref (void *cookie)
{
- if (mach_port_deallocate (mach_task_self (), (mach_port_t) cookie))
+ if (__mach_port_deallocate (mach_task_self (), (mach_port_t) cookie))
{
errno = EINVAL;
return -1;
return 0;
}
-
FILE *
mach_open_devstream (mach_port_t dev, const char *mode)
{
return NULL;
}
- stream = fopencookie ((void *) dev, mode, __default_io_functions);
+ stream = _IO_fopencookie ((void *) dev, mode,
+ (cookie_io_functions_t) { write: devstream_write,
+ read: devstream_read,
+ close: dealloc_ref });
if (stream == NULL)
{
- mach_port_deallocate (mach_task_self (), dev);
+ __mach_port_deallocate (mach_task_self (), dev);
return NULL;
}
- stream->__room_funcs.__input = input;
- stream->__room_funcs.__output = output;
- stream->__io_funcs.__close = dealloc_ref;
- stream->__io_funcs.__seek = NULL; /* Cannot seek. */
- stream->__io_funcs.__fileno = NULL; /* No corresponding POSIX.1 fd. */
- stream->__seen = 1;
-
return stream;
}
projects / thirdparty / glibc.git / blobdiff