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 "common/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 ();