1 /* UI_FILE - a generic STDIO like output stream.
3 Copyright (C) 1999-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program 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
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Implement the ``struct ui_file'' object. */
24 #include "gdb_obstack.h"
25 #include "gdb_select.h"
26 #include "filestuff.h"
28 null_file null_stream
;
37 ui_file::printf (const char *format
, ...)
41 va_start (args
, format
);
42 vfprintf_unfiltered (this, format
, args
);
47 ui_file::putstr (const char *str
, int quoter
)
49 fputstr_unfiltered (str
, quoter
, this);
53 ui_file::putstrn (const char *str
, int n
, int quoter
)
55 fputstrn_unfiltered (str
, n
, quoter
, fputc_unfiltered
, this);
61 return fputc_unfiltered (c
, this);
65 ui_file::vprintf (const char *format
, va_list args
)
67 vfprintf_unfiltered (this, format
, args
);
73 null_file::write (const char *buf
, long sizeof_buf
)
75 /* Discard the request. */
79 null_file::puts (const char *)
81 /* Discard the request. */
85 null_file::write_async_safe (const char *buf
, long sizeof_buf
)
87 /* Discard the request. */
93 gdb_flush (struct ui_file
*file
)
99 ui_file_isatty (struct ui_file
*file
)
101 return file
->isatty ();
105 ui_file_write (struct ui_file
*file
,
109 file
->write (buf
, length_buf
);
113 ui_file_write_async_safe (struct ui_file
*file
,
117 file
->write_async_safe (buf
, length_buf
);
121 ui_file_read (struct ui_file
*file
, char *buf
, long length_buf
)
123 return file
->read (buf
, length_buf
);
127 fputs_unfiltered (const char *buf
, struct ui_file
*file
)
134 string_file::~string_file ()
138 string_file::write (const char *buf
, long length_buf
)
140 m_string
.append (buf
, length_buf
);
145 stdio_file::stdio_file (FILE *file
, bool close_p
)
151 stdio_file::stdio_file ()
157 stdio_file::~stdio_file ()
164 stdio_file::set_stream (FILE *file
)
167 m_fd
= fileno (file
);
171 stdio_file::open (const char *name
, const char *mode
)
173 /* Close the previous stream, if we own it. */
180 gdb_file_up f
= gdb_fopen_cloexec (name
, mode
);
185 set_stream (f
.release ());
198 stdio_file::read (char *buf
, long length_buf
)
200 /* Wait until at least one byte of data is available, or we get
201 interrupted with Control-C. */
206 FD_SET (m_fd
, &readfds
);
207 if (interruptible_select (m_fd
+ 1, &readfds
, NULL
, NULL
, NULL
) == -1)
211 return ::read (m_fd
, buf
, length_buf
);
215 stdio_file::write (const char *buf
, long length_buf
)
217 /* Calling error crashes when we are called from the exception framework. */
218 if (fwrite (buf
, length_buf
, 1, m_file
))
225 stdio_file::write_async_safe (const char *buf
, long length_buf
)
227 /* This is written the way it is to avoid a warning from gcc about not using the
228 result of write (since it can be declared with attribute warn_unused_result).
229 Alas casting to void doesn't work for this. */
230 if (::write (m_fd
, buf
, length_buf
))
237 stdio_file::puts (const char *linebuffer
)
239 /* Calling error crashes when we are called from the exception framework. */
240 if (fputs (linebuffer
, m_file
))
247 stdio_file::isatty ()
249 return ::isatty (m_fd
);
254 /* This is the implementation of ui_file method 'write' for stderr.
255 gdb_stdout is flushed before writing to gdb_stderr. */
258 stderr_file::write (const char *buf
, long length_buf
)
260 gdb_flush (gdb_stdout
);
261 stdio_file::write (buf
, length_buf
);
264 /* This is the implementation of ui_file method 'puts' for stderr.
265 gdb_stdout is flushed before writing to gdb_stderr. */
268 stderr_file::puts (const char *linebuffer
)
270 gdb_flush (gdb_stdout
);
271 stdio_file::puts (linebuffer
);
274 stderr_file::stderr_file (FILE *stream
)
275 : stdio_file (stream
)
280 tee_file::tee_file (ui_file
*one
, bool close_one
,
281 ui_file
*two
, bool close_two
)
284 m_close_one (close_one
),
285 m_close_two (close_two
)
288 tee_file::~tee_file ()
304 tee_file::write (const char *buf
, long length_buf
)
306 m_one
->write (buf
, length_buf
);
307 m_two
->write (buf
, length_buf
);
311 tee_file::write_async_safe (const char *buf
, long length_buf
)
313 m_one
->write_async_safe (buf
, length_buf
);
314 m_two
->write_async_safe (buf
, length_buf
);
318 tee_file::puts (const char *linebuffer
)
320 m_one
->puts (linebuffer
);
321 m_two
->puts (linebuffer
);
327 return m_one
->isatty ();
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