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/* MI Console code.
Copyright (C) 2000-2021 Free Software Foundation, Inc.
Contributed by Cygnus Solutions (a Red Hat company).
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* An MI console is a kind of ui_file stream that sends output to
stdout, but encapsulated and prefixed with a distinctive string;
for instance, error output is normally identified by a leading
"&". */
#include "defs.h"
#include "mi-console.h"
/* Create a console that wraps the given output stream RAW with the
string PREFIX and quoting it with QUOTE. */
mi_console_file::mi_console_file (ui_file *raw, const char *prefix, char quote)
: m_raw (raw),
m_prefix (prefix),
m_quote (quote)
{}
void
mi_console_file::write (const char *buf, long length_buf)
{
size_t prev_size = m_buffer.size ();
/* Append the text to our internal buffer. */
m_buffer.write (buf, length_buf);
/* Flush when an embedded newline is present anywhere in the
buffer. */
if (strchr (m_buffer.c_str () + prev_size, '\n') != NULL)
this->flush ();
}
/* Write C to STREAM's in an async-safe way. */
static int
do_fputc_async_safe (int c, ui_file *stream)
{
char ch = c;
stream->write_async_safe (&ch, 1);
return c;
}
void
mi_console_file::write_async_safe (const char *buf, long length_buf)
{
m_raw->write_async_safe (m_prefix, strlen (m_prefix));
if (m_quote)
{
m_raw->write_async_safe (&m_quote, 1);
fputstrn_unfiltered (buf, length_buf, m_quote, do_fputc_async_safe,
m_raw);
m_raw->write_async_safe (&m_quote, 1);
}
else
fputstrn_unfiltered (buf, length_buf, 0, do_fputc_async_safe, m_raw);
char nl = '\n';
m_raw->write_async_safe (&nl, 1);
}
void
mi_console_file::flush ()
{
const std::string &str = m_buffer.string ();
/* Transform a byte sequence into a console output packet. */
if (!str.empty ())
{
size_t length_buf = str.size ();
const char *buf = str.data ();
fputs_unfiltered (m_prefix, m_raw);
if (m_quote)
{
fputc_unfiltered (m_quote, m_raw);
fputstrn_unfiltered (buf, length_buf, m_quote, fputc_unfiltered,
m_raw);
fputc_unfiltered (m_quote, m_raw);
fputc_unfiltered ('\n', m_raw);
}
else
{
fputstrn_unfiltered (buf, length_buf, 0, fputc_unfiltered, m_raw);
fputc_unfiltered ('\n', m_raw);
}
gdb_flush (m_raw);
}
m_buffer.clear ();
}
/* Change the underlying stream of the console directly; this is
useful as a minimum-impact way to reflect external changes like
logging enable/disable. */
void
mi_console_file::set_raw (ui_file *raw)
{
m_raw = raw;
}
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