1 /* UI_FILE - a generic STDIO like output stream.
2 Copyright (C) 1999, 2000 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Implement the ``struct ui_file'' object. */
25 #include "gdb_string.h"
28 #define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
30 static ui_file_isatty_ftype null_file_isatty;
31 static ui_file_write_ftype null_file_write;
32 static ui_file_fputs_ftype null_file_fputs;
33 static ui_file_flush_ftype null_file_flush;
34 static ui_file_delete_ftype null_file_delete;
35 static ui_file_rewind_ftype null_file_rewind;
36 static ui_file_put_ftype null_file_put;
41 ui_file_flush_ftype *to_flush;
42 ui_file_write_ftype *to_write;
43 ui_file_fputs_ftype *to_fputs;
44 ui_file_delete_ftype *to_delete;
45 ui_file_isatty_ftype *to_isatty;
46 ui_file_rewind_ftype *to_rewind;
47 ui_file_put_ftype *to_put;
55 struct ui_file *file = xmalloc (sizeof (struct ui_file));
56 file->magic = &ui_file_magic;
57 set_ui_file_data (file, NULL, null_file_delete);
58 set_ui_file_flush (file, null_file_flush);
59 set_ui_file_write (file, null_file_write);
60 set_ui_file_fputs (file, null_file_fputs);
61 set_ui_file_isatty (file, null_file_isatty);
62 set_ui_file_rewind (file, null_file_rewind);
63 set_ui_file_put (file, null_file_put);
71 file->to_delete (file);
76 null_file_isatty (file)
83 null_file_rewind (file)
90 null_file_put (struct ui_file *file,
91 ui_file_put_method_ftype *write,
98 null_file_flush (file)
105 null_file_write (struct ui_file *file,
109 if (file->to_fputs == null_file_fputs)
110 /* Both the write and fputs methods are null. Discard the
115 /* The fputs method isn't null, slowly pass the write request
116 onto that. FYI, this isn't as bad as it may look - the
117 current (as of 1999-11-07) printf_* function calls fputc and
118 fputc does exactly the below. By having a write function it
119 is possible to clean up that code. */
123 for (i = 0; i < sizeof_buf; i++)
126 file->to_fputs (b, file);
133 null_file_fputs (buf, file)
135 struct ui_file *file;
137 if (file->to_write == null_file_write)
138 /* Both the write and fputs methods are null. Discard the
143 /* The write method was implemented, use that. */
144 file->to_write (file, buf, strlen (buf));
149 null_file_delete (file)
150 struct ui_file *file;
157 struct ui_file *file;
159 if (file->magic != &ui_file_magic)
160 internal_error ("ui_file_data: bad magic number");
161 return file->to_data;
166 struct ui_file *file;
168 file->to_flush (file);
172 ui_file_isatty (file)
173 struct ui_file *file;
175 return file->to_isatty (file);
179 ui_file_rewind (file)
180 struct ui_file *file;
182 file->to_rewind (file);
186 ui_file_put (struct ui_file *file,
187 ui_file_put_method_ftype *write,
190 file->to_put (file, write, dest);
194 ui_file_write (struct ui_file *file,
198 file->to_write (file, buf, length_buf);
202 fputs_unfiltered (buf, file)
204 struct ui_file *file;
206 file->to_fputs (buf, file);
210 set_ui_file_flush (file, flush)
211 struct ui_file *file;
212 ui_file_flush_ftype *flush;
214 file->to_flush = flush;
218 set_ui_file_isatty (file, isatty)
219 struct ui_file *file;
220 ui_file_isatty_ftype *isatty;
222 file->to_isatty = isatty;
226 set_ui_file_rewind (file, rewind)
227 struct ui_file *file;
228 ui_file_rewind_ftype *rewind;
230 file->to_rewind = rewind;
234 set_ui_file_put (file, put)
235 struct ui_file *file;
236 ui_file_put_ftype *put;
242 set_ui_file_write (struct ui_file *file,
243 ui_file_write_ftype *write)
245 file->to_write = write;
249 set_ui_file_fputs (file, fputs)
250 struct ui_file *file;
251 ui_file_fputs_ftype *fputs;
253 file->to_fputs = fputs;
257 set_ui_file_data (file, data, delete)
258 struct ui_file *file;
260 ui_file_delete_ftype *delete;
262 file->to_data = data;
263 file->to_delete = delete;
266 /* ui_file utility function for converting a ``struct ui_file'' into
267 a memory buffer''. */
269 struct accumulated_ui_file
276 do_ui_file_xstrdup (void *context, const char *buffer, long length)
278 struct accumulated_ui_file *acc = context;
279 if (acc->buffer == NULL)
280 acc->buffer = xmalloc (length + 1);
282 acc->buffer = xrealloc (acc->buffer, acc->length + length + 1);
283 memcpy (acc->buffer + acc->length, buffer, length);
284 acc->length += length;
285 acc->buffer[acc->length] = '\0';
289 ui_file_xstrdup (struct ui_file *file,
292 struct accumulated_ui_file acc;
295 ui_file_put (file, do_ui_file_xstrdup, &acc);
296 if (acc.buffer == NULL)
297 acc.buffer = xstrdup ("");
298 *length = acc.length;
302 /* A pure memory based ``struct ui_file'' that can be used an output
303 buffer. The buffers accumulated contents are available via
314 static ui_file_rewind_ftype mem_file_rewind;
315 static ui_file_put_ftype mem_file_put;
316 static ui_file_write_ftype mem_file_write;
317 static ui_file_delete_ftype mem_file_delete;
318 static struct ui_file *mem_file_new PARAMS ((void));
319 static int mem_file_magic;
321 static struct ui_file *
324 struct mem_file *stream = XMALLOC (struct mem_file);
325 struct ui_file *file = ui_file_new ();
326 set_ui_file_data (file, stream, mem_file_delete);
327 set_ui_file_rewind (file, mem_file_rewind);
328 set_ui_file_put (file, mem_file_put);
329 set_ui_file_write (file, mem_file_write);
330 stream->magic = &mem_file_magic;
331 stream->buffer = NULL;
332 stream->sizeof_buffer = 0;
333 stream->length_buffer = 0;
338 mem_file_delete (struct ui_file *file)
340 struct mem_file *stream = ui_file_data (file);
341 if (stream->magic != &mem_file_magic)
342 internal_error ("mem_file_delete: bad magic number");
343 if (stream->buffer != NULL)
344 free (stream->buffer);
351 return mem_file_new ();
355 mem_file_rewind (struct ui_file *file)
357 struct mem_file *stream = ui_file_data (file);
358 if (stream->magic != &mem_file_magic)
359 internal_error ("mem_file_rewind: bad magic number");
360 stream->length_buffer = 0;
364 mem_file_put (struct ui_file *file,
365 ui_file_put_method_ftype *write,
368 struct mem_file *stream = ui_file_data (file);
369 if (stream->magic != &mem_file_magic)
370 internal_error ("mem_file_put: bad magic number");
371 if (stream->length_buffer > 0)
372 write (dest, stream->buffer, stream->length_buffer);
376 mem_file_write (struct ui_file *file,
380 struct mem_file *stream = ui_file_data (file);
381 if (stream->magic != &mem_file_magic)
382 internal_error ("mem_file_write: bad magic number");
383 if (stream->buffer == NULL)
385 stream->length_buffer = length_buffer;
386 stream->sizeof_buffer = length_buffer;
387 stream->buffer = xmalloc (stream->sizeof_buffer);
388 memcpy (stream->buffer, buffer, length_buffer);
392 int new_length = stream->length_buffer + length_buffer;
393 if (new_length >= stream->sizeof_buffer)
395 stream->sizeof_buffer = new_length;
396 stream->buffer = xrealloc (stream->buffer, stream->sizeof_buffer);
398 memcpy (stream->buffer + stream->length_buffer, buffer, length_buffer);
399 stream->length_buffer = new_length;
403 /* ``struct ui_file'' implementation that maps directly onto
406 static ui_file_write_ftype stdio_file_write;
407 static ui_file_fputs_ftype stdio_file_fputs;
408 static ui_file_isatty_ftype stdio_file_isatty;
409 static ui_file_delete_ftype stdio_file_delete;
410 static struct ui_file *stdio_file_new PARAMS ((FILE * file, int close_p));
411 static ui_file_flush_ftype stdio_file_flush;
413 static int stdio_file_magic;
422 static struct ui_file *
423 stdio_file_new (file, close_p)
427 struct ui_file *ui_file = ui_file_new ();
428 struct stdio_file *stdio = xmalloc (sizeof (struct stdio_file));
429 stdio->magic = &stdio_file_magic;
431 stdio->close_p = close_p;
432 set_ui_file_data (ui_file, stdio, stdio_file_delete);
433 set_ui_file_flush (ui_file, stdio_file_flush);
434 set_ui_file_write (ui_file, stdio_file_write);
435 set_ui_file_fputs (ui_file, stdio_file_fputs);
436 set_ui_file_isatty (ui_file, stdio_file_isatty);
441 stdio_file_delete (file)
442 struct ui_file *file;
444 struct stdio_file *stdio = ui_file_data (file);
445 if (stdio->magic != &stdio_file_magic)
446 internal_error ("stdio_file_delete: bad magic number");
449 fclose (stdio->file);
455 stdio_file_flush (file)
456 struct ui_file *file;
458 struct stdio_file *stdio = ui_file_data (file);
459 if (stdio->magic != &stdio_file_magic)
460 internal_error ("stdio_file_flush: bad magic number");
461 fflush (stdio->file);
465 stdio_file_write (struct ui_file *file, const char *buf, long length_buf)
467 struct stdio_file *stdio = ui_file_data (file);
468 if (stdio->magic != &stdio_file_magic)
469 internal_error ("stdio_file_write: bad magic number");
470 fwrite (buf, length_buf, 1, stdio->file);
474 stdio_file_fputs (linebuffer, file)
475 const char *linebuffer;
476 struct ui_file *file;
478 struct stdio_file *stdio = ui_file_data (file);
479 if (stdio->magic != &stdio_file_magic)
480 internal_error ("stdio_file_fputs: bad magic number");
481 fputs (linebuffer, stdio->file);
485 stdio_file_isatty (file)
486 struct ui_file *file;
488 struct stdio_file *stdio = ui_file_data (file);
489 if (stdio->magic != &stdio_file_magic)
490 internal_error ("stdio_file_isatty: bad magic number");
491 return (isatty (fileno (stdio->file)));
494 /* Like fdopen(). Create a ui_file from a previously opened FILE. */
497 stdio_fileopen (file)
500 return stdio_file_new (file, 0);
504 gdb_fopen (name, mode)
508 FILE *f = fopen (name, mode);
511 return stdio_file_new (f, 1);