254 lines
7 KiB
C
254 lines
7 KiB
C
/* UI_FILE - a generic STDIO like output stream.
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Copyright (C) 1999-2016 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "ui-file.h"
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#include "tui/tui-file.h"
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#include "tui/tui-io.h"
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#include "tui/tui-command.h"
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#include "tui.h"
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/* A ``struct ui_file'' that is compatible with all the legacy
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code. */
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/* new */
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enum streamtype
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{
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afile,
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astring
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};
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/* new */
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struct tui_stream
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{
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int *ts_magic;
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enum streamtype ts_streamtype;
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FILE *ts_filestream;
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char *ts_strbuf;
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int ts_buflen;
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};
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static ui_file_flush_ftype tui_file_flush;
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extern ui_file_fputs_ftype tui_file_fputs;
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static ui_file_isatty_ftype tui_file_isatty;
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static ui_file_rewind_ftype tui_file_rewind;
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static ui_file_put_ftype tui_file_put;
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static ui_file_delete_ftype tui_file_delete;
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static struct ui_file *tui_file_new (void);
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static int tui_file_magic;
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static struct ui_file *
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tui_file_new (void)
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{
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struct tui_stream *tui = XNEW (struct tui_stream);
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struct ui_file *file = ui_file_new ();
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set_ui_file_data (file, tui, tui_file_delete);
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set_ui_file_flush (file, tui_file_flush);
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set_ui_file_fputs (file, tui_file_fputs);
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set_ui_file_isatty (file, tui_file_isatty);
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set_ui_file_rewind (file, tui_file_rewind);
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set_ui_file_put (file, tui_file_put);
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tui->ts_magic = &tui_file_magic;
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return file;
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}
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static void
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tui_file_delete (struct ui_file *file)
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{
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struct tui_stream *tmpstream = (struct tui_stream *) ui_file_data (file);
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if (tmpstream->ts_magic != &tui_file_magic)
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internal_error (__FILE__, __LINE__,
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_("tui_file_delete: bad magic number"));
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if ((tmpstream->ts_streamtype == astring)
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&& (tmpstream->ts_strbuf != NULL))
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{
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xfree (tmpstream->ts_strbuf);
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}
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xfree (tmpstream);
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}
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struct ui_file *
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tui_fileopen (FILE *stream)
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{
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struct ui_file *file = tui_file_new ();
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struct tui_stream *tmpstream = (struct tui_stream *) ui_file_data (file);
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tmpstream->ts_streamtype = afile;
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tmpstream->ts_filestream = stream;
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tmpstream->ts_strbuf = NULL;
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tmpstream->ts_buflen = 0;
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return file;
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}
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struct ui_file *
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tui_sfileopen (int n)
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{
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struct ui_file *file = tui_file_new ();
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struct tui_stream *tmpstream = (struct tui_stream *) ui_file_data (file);
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tmpstream->ts_streamtype = astring;
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tmpstream->ts_filestream = NULL;
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if (n > 0)
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{
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tmpstream->ts_strbuf = XNEWVEC (char, n + 1);
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tmpstream->ts_strbuf[0] = '\0';
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}
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else
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/* Do not allocate the buffer now. The first time something is
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printed one will be allocated by tui_file_adjust_strbuf(). */
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tmpstream->ts_strbuf = NULL;
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tmpstream->ts_buflen = n;
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return file;
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}
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static int
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tui_file_isatty (struct ui_file *file)
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{
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struct tui_stream *stream = (struct tui_stream *) ui_file_data (file);
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if (stream->ts_magic != &tui_file_magic)
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internal_error (__FILE__, __LINE__,
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_("tui_file_isatty: bad magic number"));
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if (stream->ts_streamtype == afile)
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return (isatty (fileno (stream->ts_filestream)));
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else
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return 0;
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}
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static void
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tui_file_rewind (struct ui_file *file)
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{
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struct tui_stream *stream = (struct tui_stream *) ui_file_data (file);
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if (stream->ts_magic != &tui_file_magic)
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internal_error (__FILE__, __LINE__,
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_("tui_file_rewind: bad magic number"));
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stream->ts_strbuf[0] = '\0';
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}
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static void
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tui_file_put (struct ui_file *file,
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ui_file_put_method_ftype *write,
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void *dest)
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{
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struct tui_stream *stream = (struct tui_stream *) ui_file_data (file);
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if (stream->ts_magic != &tui_file_magic)
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internal_error (__FILE__, __LINE__,
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_("tui_file_put: bad magic number"));
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if (stream->ts_streamtype == astring)
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write (dest, stream->ts_strbuf, strlen (stream->ts_strbuf));
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}
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/* All TUI I/O sent to the *_filtered and *_unfiltered functions
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eventually ends up here. The fputs_unfiltered_hook is primarily
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used by GUIs to collect all output and send it to the GUI, instead
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of the controlling terminal. Only output to gdb_stdout and
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gdb_stderr are sent to the hook. Everything else is sent on to
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fputs to allow file I/O to be handled appropriately. */
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/* FIXME: Should be broken up and moved to a TUI specific file. */
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void
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tui_file_fputs (const char *linebuffer, struct ui_file *file)
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{
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struct tui_stream *stream = (struct tui_stream *) ui_file_data (file);
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if (stream->ts_streamtype == astring)
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{
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tui_file_adjust_strbuf (strlen (linebuffer), file);
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strcat (stream->ts_strbuf, linebuffer);
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}
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else
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{
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tui_puts (linebuffer);
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/* gdb_stdout is buffered, and the caller must gdb_flush it at
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appropriate times. Other streams are not so buffered. */
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if (file != gdb_stdout)
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tui_refresh_cmd_win ();
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}
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}
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char *
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tui_file_get_strbuf (struct ui_file *file)
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{
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struct tui_stream *stream = (struct tui_stream *) ui_file_data (file);
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if (stream->ts_magic != &tui_file_magic)
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internal_error (__FILE__, __LINE__,
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_("tui_file_get_strbuf: bad magic number"));
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return (stream->ts_strbuf);
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}
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/* Adjust the length of the buffer by the amount necessary to
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accomodate appending a string of length N to the buffer
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contents. */
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void
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tui_file_adjust_strbuf (int n, struct ui_file *file)
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{
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struct tui_stream *stream = (struct tui_stream *) ui_file_data (file);
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int non_null_chars;
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if (stream->ts_magic != &tui_file_magic)
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internal_error (__FILE__, __LINE__,
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_("tui_file_adjust_strbuf: bad magic number"));
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if (stream->ts_streamtype != astring)
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return;
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if (stream->ts_strbuf)
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{
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/* There is already a buffer allocated. */
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non_null_chars = strlen (stream->ts_strbuf);
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if (n > (stream->ts_buflen - non_null_chars - 1))
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{
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stream->ts_buflen = n + non_null_chars + 1;
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stream->ts_strbuf
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= XRESIZEVEC (char, stream->ts_strbuf, stream->ts_buflen);
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}
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}
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else
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/* No buffer yet, so allocate one of the desired size. */
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stream->ts_strbuf = XNEWVEC (char, n + 1);
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}
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static void
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tui_file_flush (struct ui_file *file)
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{
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struct tui_stream *stream = (struct tui_stream *) ui_file_data (file);
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if (stream->ts_magic != &tui_file_magic)
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internal_error (__FILE__, __LINE__,
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_("tui_file_flush: bad magic number"));
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switch (stream->ts_streamtype)
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{
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case astring:
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break;
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case afile:
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/* gdb_stdout is buffered. Other files are always flushed on
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every write. */
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if (file == gdb_stdout)
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tui_refresh_cmd_win ();
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fflush (stream->ts_filestream);
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break;
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}
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}
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