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513 lines
12 KiB
C
513 lines
12 KiB
C
/* UI_FILE - a generic STDIO like output stream.
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Copyright (C) 1999, 2000 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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Implement the ``struct ui_file'' object. */
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#include "defs.h"
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#include "ui-file.h"
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#include "gdb_string.h"
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#undef XMALLOC
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#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
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static ui_file_isatty_ftype null_file_isatty;
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static ui_file_write_ftype null_file_write;
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static ui_file_fputs_ftype null_file_fputs;
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static ui_file_flush_ftype null_file_flush;
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static ui_file_delete_ftype null_file_delete;
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static ui_file_rewind_ftype null_file_rewind;
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static ui_file_put_ftype null_file_put;
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struct ui_file
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{
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int *magic;
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ui_file_flush_ftype *to_flush;
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ui_file_write_ftype *to_write;
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ui_file_fputs_ftype *to_fputs;
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ui_file_delete_ftype *to_delete;
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ui_file_isatty_ftype *to_isatty;
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ui_file_rewind_ftype *to_rewind;
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ui_file_put_ftype *to_put;
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void *to_data;
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};
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int ui_file_magic;
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struct ui_file *
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ui_file_new ()
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{
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struct ui_file *file = xmalloc (sizeof (struct ui_file));
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file->magic = &ui_file_magic;
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set_ui_file_data (file, NULL, null_file_delete);
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set_ui_file_flush (file, null_file_flush);
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set_ui_file_write (file, null_file_write);
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set_ui_file_fputs (file, null_file_fputs);
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set_ui_file_isatty (file, null_file_isatty);
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set_ui_file_rewind (file, null_file_rewind);
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set_ui_file_put (file, null_file_put);
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return file;
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}
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void
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ui_file_delete (file)
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struct ui_file *file;
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{
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file->to_delete (file);
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free (file);
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}
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static int
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null_file_isatty (file)
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struct ui_file *file;
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{
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return 0;
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}
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static void
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null_file_rewind (file)
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struct ui_file *file;
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{
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return;
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}
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static void
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null_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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return;
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}
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static void
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null_file_flush (file)
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struct ui_file *file;
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{
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return;
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}
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static void
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null_file_write (struct ui_file *file,
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const char *buf,
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long sizeof_buf)
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{
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if (file->to_fputs == null_file_fputs)
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/* Both the write and fputs methods are null. Discard the
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request. */
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return;
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else
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{
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/* The fputs method isn't null, slowly pass the write request
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onto that. FYI, this isn't as bad as it may look - the
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current (as of 1999-11-07) printf_* function calls fputc and
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fputc does exactly the below. By having a write function it
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is possible to clean up that code. */
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int i;
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char b[2];
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b[1] = '\0';
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for (i = 0; i < sizeof_buf; i++)
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{
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b[0] = buf[i];
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file->to_fputs (b, file);
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}
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return;
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}
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}
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static void
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null_file_fputs (buf, file)
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const char *buf;
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struct ui_file *file;
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{
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if (file->to_write == null_file_write)
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/* Both the write and fputs methods are null. Discard the
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request. */
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return;
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else
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{
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/* The write method was implemented, use that. */
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file->to_write (file, buf, strlen (buf));
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}
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}
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static void
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null_file_delete (file)
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struct ui_file *file;
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{
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return;
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}
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void *
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ui_file_data (file)
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struct ui_file *file;
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{
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if (file->magic != &ui_file_magic)
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internal_error ("ui_file_data: bad magic number");
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return file->to_data;
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}
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void
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gdb_flush (file)
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struct ui_file *file;
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{
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file->to_flush (file);
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}
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int
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ui_file_isatty (file)
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struct ui_file *file;
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{
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return file->to_isatty (file);
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}
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void
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ui_file_rewind (file)
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struct ui_file *file;
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{
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file->to_rewind (file);
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}
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void
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ui_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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file->to_put (file, write, dest);
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}
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void
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ui_file_write (struct ui_file *file,
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const char *buf,
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long length_buf)
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{
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file->to_write (file, buf, length_buf);
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}
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void
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fputs_unfiltered (buf, file)
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const char *buf;
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struct ui_file *file;
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{
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file->to_fputs (buf, file);
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}
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void
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set_ui_file_flush (file, flush)
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struct ui_file *file;
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ui_file_flush_ftype *flush;
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{
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file->to_flush = flush;
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}
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void
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set_ui_file_isatty (file, isatty)
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struct ui_file *file;
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ui_file_isatty_ftype *isatty;
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{
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file->to_isatty = isatty;
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}
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void
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set_ui_file_rewind (file, rewind)
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struct ui_file *file;
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ui_file_rewind_ftype *rewind;
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{
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file->to_rewind = rewind;
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}
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void
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set_ui_file_put (file, put)
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struct ui_file *file;
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ui_file_put_ftype *put;
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{
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file->to_put = put;
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}
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void
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set_ui_file_write (struct ui_file *file,
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ui_file_write_ftype *write)
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{
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file->to_write = write;
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}
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void
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set_ui_file_fputs (file, fputs)
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struct ui_file *file;
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ui_file_fputs_ftype *fputs;
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{
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file->to_fputs = fputs;
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}
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void
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set_ui_file_data (file, data, delete)
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struct ui_file *file;
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void *data;
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ui_file_delete_ftype *delete;
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{
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file->to_data = data;
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file->to_delete = delete;
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}
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/* ui_file utility function for converting a ``struct ui_file'' into
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a memory buffer''. */
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struct accumulated_ui_file
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{
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char *buffer;
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long length;
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};
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static void
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do_ui_file_xstrdup (void *context, const char *buffer, long length)
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{
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struct accumulated_ui_file *acc = context;
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if (acc->buffer == NULL)
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acc->buffer = xmalloc (length + 1);
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else
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acc->buffer = xrealloc (acc->buffer, acc->length + length + 1);
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memcpy (acc->buffer + acc->length, buffer, length);
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acc->length += length;
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acc->buffer[acc->length] = '\0';
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}
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char *
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ui_file_xstrdup (struct ui_file *file,
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long *length)
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{
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struct accumulated_ui_file acc;
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acc.buffer = NULL;
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acc.length = 0;
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ui_file_put (file, do_ui_file_xstrdup, &acc);
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if (acc.buffer == NULL)
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acc.buffer = xstrdup ("");
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*length = acc.length;
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return acc.buffer;
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}
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/* A pure memory based ``struct ui_file'' that can be used an output
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buffer. The buffers accumulated contents are available via
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ui_file_put(). */
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struct mem_file
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{
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int *magic;
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char *buffer;
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int sizeof_buffer;
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int length_buffer;
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};
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static ui_file_rewind_ftype mem_file_rewind;
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static ui_file_put_ftype mem_file_put;
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static ui_file_write_ftype mem_file_write;
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static ui_file_delete_ftype mem_file_delete;
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static struct ui_file *mem_file_new (void);
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static int mem_file_magic;
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static struct ui_file *
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mem_file_new (void)
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{
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struct mem_file *stream = XMALLOC (struct mem_file);
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struct ui_file *file = ui_file_new ();
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set_ui_file_data (file, stream, mem_file_delete);
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set_ui_file_rewind (file, mem_file_rewind);
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set_ui_file_put (file, mem_file_put);
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set_ui_file_write (file, mem_file_write);
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stream->magic = &mem_file_magic;
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stream->buffer = NULL;
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stream->sizeof_buffer = 0;
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stream->length_buffer = 0;
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return file;
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}
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static void
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mem_file_delete (struct ui_file *file)
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{
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struct mem_file *stream = ui_file_data (file);
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if (stream->magic != &mem_file_magic)
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internal_error ("mem_file_delete: bad magic number");
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if (stream->buffer != NULL)
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free (stream->buffer);
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free (stream);
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}
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struct ui_file *
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mem_fileopen (void)
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{
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return mem_file_new ();
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}
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static void
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mem_file_rewind (struct ui_file *file)
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{
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struct mem_file *stream = ui_file_data (file);
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if (stream->magic != &mem_file_magic)
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internal_error ("mem_file_rewind: bad magic number");
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stream->length_buffer = 0;
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}
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static void
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mem_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 mem_file *stream = ui_file_data (file);
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if (stream->magic != &mem_file_magic)
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internal_error ("mem_file_put: bad magic number");
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if (stream->length_buffer > 0)
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write (dest, stream->buffer, stream->length_buffer);
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}
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void
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mem_file_write (struct ui_file *file,
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const char *buffer,
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long length_buffer)
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{
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struct mem_file *stream = ui_file_data (file);
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if (stream->magic != &mem_file_magic)
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internal_error ("mem_file_write: bad magic number");
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if (stream->buffer == NULL)
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{
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stream->length_buffer = length_buffer;
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stream->sizeof_buffer = length_buffer;
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stream->buffer = xmalloc (stream->sizeof_buffer);
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memcpy (stream->buffer, buffer, length_buffer);
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}
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else
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{
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int new_length = stream->length_buffer + length_buffer;
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if (new_length >= stream->sizeof_buffer)
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{
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stream->sizeof_buffer = new_length;
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stream->buffer = xrealloc (stream->buffer, stream->sizeof_buffer);
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}
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memcpy (stream->buffer + stream->length_buffer, buffer, length_buffer);
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stream->length_buffer = new_length;
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}
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}
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/* ``struct ui_file'' implementation that maps directly onto
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<stdio.h>'s FILE. */
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static ui_file_write_ftype stdio_file_write;
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static ui_file_fputs_ftype stdio_file_fputs;
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static ui_file_isatty_ftype stdio_file_isatty;
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static ui_file_delete_ftype stdio_file_delete;
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static struct ui_file *stdio_file_new (FILE * file, int close_p);
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static ui_file_flush_ftype stdio_file_flush;
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static int stdio_file_magic;
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struct stdio_file
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{
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int *magic;
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FILE *file;
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int close_p;
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};
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static struct ui_file *
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stdio_file_new (file, close_p)
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FILE *file;
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int close_p;
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{
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struct ui_file *ui_file = ui_file_new ();
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struct stdio_file *stdio = xmalloc (sizeof (struct stdio_file));
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stdio->magic = &stdio_file_magic;
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stdio->file = file;
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stdio->close_p = close_p;
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set_ui_file_data (ui_file, stdio, stdio_file_delete);
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set_ui_file_flush (ui_file, stdio_file_flush);
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set_ui_file_write (ui_file, stdio_file_write);
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set_ui_file_fputs (ui_file, stdio_file_fputs);
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set_ui_file_isatty (ui_file, stdio_file_isatty);
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return ui_file;
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}
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static void
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stdio_file_delete (file)
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struct ui_file *file;
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{
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struct stdio_file *stdio = ui_file_data (file);
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if (stdio->magic != &stdio_file_magic)
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internal_error ("stdio_file_delete: bad magic number");
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if (stdio->close_p)
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{
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fclose (stdio->file);
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}
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free (stdio);
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}
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static void
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stdio_file_flush (file)
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struct ui_file *file;
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{
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struct stdio_file *stdio = ui_file_data (file);
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if (stdio->magic != &stdio_file_magic)
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internal_error ("stdio_file_flush: bad magic number");
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fflush (stdio->file);
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}
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static void
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stdio_file_write (struct ui_file *file, const char *buf, long length_buf)
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{
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struct stdio_file *stdio = ui_file_data (file);
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if (stdio->magic != &stdio_file_magic)
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internal_error ("stdio_file_write: bad magic number");
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fwrite (buf, length_buf, 1, stdio->file);
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}
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static void
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stdio_file_fputs (linebuffer, file)
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const char *linebuffer;
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struct ui_file *file;
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{
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struct stdio_file *stdio = ui_file_data (file);
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if (stdio->magic != &stdio_file_magic)
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internal_error ("stdio_file_fputs: bad magic number");
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fputs (linebuffer, stdio->file);
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}
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static int
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stdio_file_isatty (file)
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struct ui_file *file;
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{
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struct stdio_file *stdio = ui_file_data (file);
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if (stdio->magic != &stdio_file_magic)
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internal_error ("stdio_file_isatty: bad magic number");
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return (isatty (fileno (stdio->file)));
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}
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/* Like fdopen(). Create a ui_file from a previously opened FILE. */
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struct ui_file *
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stdio_fileopen (file)
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FILE *file;
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{
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return stdio_file_new (file, 0);
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}
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struct ui_file *
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gdb_fopen (name, mode)
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char *name;
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char *mode;
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{
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FILE *f = fopen (name, mode);
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if (f == NULL)
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return NULL;
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return stdio_file_new (f, 1);
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}
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