| 1 | /* UI_FILE - a generic STDIO like output stream. |
| 2 | |
| 3 | Copyright (C) 1999, 2000, 2001, 2002, 2007, 2008 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | /* Implement the ``struct ui_file'' object. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include "ui-file.h" |
| 25 | #include "gdb_string.h" |
| 26 | |
| 27 | #include <errno.h> |
| 28 | |
| 29 | static ui_file_isatty_ftype null_file_isatty; |
| 30 | static ui_file_write_ftype null_file_write; |
| 31 | static ui_file_fputs_ftype null_file_fputs; |
| 32 | static ui_file_read_ftype null_file_read; |
| 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; |
| 37 | |
| 38 | struct ui_file |
| 39 | { |
| 40 | int *magic; |
| 41 | ui_file_flush_ftype *to_flush; |
| 42 | ui_file_write_ftype *to_write; |
| 43 | ui_file_fputs_ftype *to_fputs; |
| 44 | ui_file_read_ftype *to_read; |
| 45 | ui_file_delete_ftype *to_delete; |
| 46 | ui_file_isatty_ftype *to_isatty; |
| 47 | ui_file_rewind_ftype *to_rewind; |
| 48 | ui_file_put_ftype *to_put; |
| 49 | void *to_data; |
| 50 | }; |
| 51 | int ui_file_magic; |
| 52 | |
| 53 | struct ui_file * |
| 54 | ui_file_new (void) |
| 55 | { |
| 56 | struct ui_file *file = xmalloc (sizeof (struct ui_file)); |
| 57 | file->magic = &ui_file_magic; |
| 58 | set_ui_file_data (file, NULL, null_file_delete); |
| 59 | set_ui_file_flush (file, null_file_flush); |
| 60 | set_ui_file_write (file, null_file_write); |
| 61 | set_ui_file_fputs (file, null_file_fputs); |
| 62 | set_ui_file_read (file, null_file_read); |
| 63 | set_ui_file_isatty (file, null_file_isatty); |
| 64 | set_ui_file_rewind (file, null_file_rewind); |
| 65 | set_ui_file_put (file, null_file_put); |
| 66 | return file; |
| 67 | } |
| 68 | |
| 69 | void |
| 70 | ui_file_delete (struct ui_file *file) |
| 71 | { |
| 72 | file->to_delete (file); |
| 73 | xfree (file); |
| 74 | } |
| 75 | |
| 76 | static int |
| 77 | null_file_isatty (struct ui_file *file) |
| 78 | { |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | static void |
| 83 | null_file_rewind (struct ui_file *file) |
| 84 | { |
| 85 | return; |
| 86 | } |
| 87 | |
| 88 | static void |
| 89 | null_file_put (struct ui_file *file, |
| 90 | ui_file_put_method_ftype *write, |
| 91 | void *dest) |
| 92 | { |
| 93 | return; |
| 94 | } |
| 95 | |
| 96 | static void |
| 97 | null_file_flush (struct ui_file *file) |
| 98 | { |
| 99 | return; |
| 100 | } |
| 101 | |
| 102 | static void |
| 103 | null_file_write (struct ui_file *file, |
| 104 | const char *buf, |
| 105 | long sizeof_buf) |
| 106 | { |
| 107 | if (file->to_fputs == null_file_fputs) |
| 108 | /* Both the write and fputs methods are null. Discard the |
| 109 | request. */ |
| 110 | return; |
| 111 | else |
| 112 | { |
| 113 | /* The fputs method isn't null, slowly pass the write request |
| 114 | onto that. FYI, this isn't as bad as it may look - the |
| 115 | current (as of 1999-11-07) printf_* function calls fputc and |
| 116 | fputc does exactly the below. By having a write function it |
| 117 | is possible to clean up that code. */ |
| 118 | int i; |
| 119 | char b[2]; |
| 120 | b[1] = '\0'; |
| 121 | for (i = 0; i < sizeof_buf; i++) |
| 122 | { |
| 123 | b[0] = buf[i]; |
| 124 | file->to_fputs (b, file); |
| 125 | } |
| 126 | return; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | static long |
| 131 | null_file_read (struct ui_file *file, |
| 132 | char *buf, |
| 133 | long sizeof_buf) |
| 134 | { |
| 135 | errno = EBADF; |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | static void |
| 140 | null_file_fputs (const char *buf, struct ui_file *file) |
| 141 | { |
| 142 | if (file->to_write == null_file_write) |
| 143 | /* Both the write and fputs methods are null. Discard the |
| 144 | request. */ |
| 145 | return; |
| 146 | else |
| 147 | { |
| 148 | /* The write method was implemented, use that. */ |
| 149 | file->to_write (file, buf, strlen (buf)); |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | static void |
| 154 | null_file_delete (struct ui_file *file) |
| 155 | { |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | void * |
| 160 | ui_file_data (struct ui_file *file) |
| 161 | { |
| 162 | if (file->magic != &ui_file_magic) |
| 163 | internal_error (__FILE__, __LINE__, |
| 164 | _("ui_file_data: bad magic number")); |
| 165 | return file->to_data; |
| 166 | } |
| 167 | |
| 168 | void |
| 169 | gdb_flush (struct ui_file *file) |
| 170 | { |
| 171 | file->to_flush (file); |
| 172 | } |
| 173 | |
| 174 | int |
| 175 | ui_file_isatty (struct ui_file *file) |
| 176 | { |
| 177 | return file->to_isatty (file); |
| 178 | } |
| 179 | |
| 180 | void |
| 181 | ui_file_rewind (struct ui_file *file) |
| 182 | { |
| 183 | file->to_rewind (file); |
| 184 | } |
| 185 | |
| 186 | void |
| 187 | ui_file_put (struct ui_file *file, |
| 188 | ui_file_put_method_ftype *write, |
| 189 | void *dest) |
| 190 | { |
| 191 | file->to_put (file, write, dest); |
| 192 | } |
| 193 | |
| 194 | void |
| 195 | ui_file_write (struct ui_file *file, |
| 196 | const char *buf, |
| 197 | long length_buf) |
| 198 | { |
| 199 | file->to_write (file, buf, length_buf); |
| 200 | } |
| 201 | |
| 202 | long |
| 203 | ui_file_read (struct ui_file *file, char *buf, long length_buf) |
| 204 | { |
| 205 | return file->to_read (file, buf, length_buf); |
| 206 | } |
| 207 | |
| 208 | void |
| 209 | fputs_unfiltered (const char *buf, struct ui_file *file) |
| 210 | { |
| 211 | file->to_fputs (buf, file); |
| 212 | } |
| 213 | |
| 214 | void |
| 215 | set_ui_file_flush (struct ui_file *file, ui_file_flush_ftype *flush) |
| 216 | { |
| 217 | file->to_flush = flush; |
| 218 | } |
| 219 | |
| 220 | void |
| 221 | set_ui_file_isatty (struct ui_file *file, ui_file_isatty_ftype *isatty) |
| 222 | { |
| 223 | file->to_isatty = isatty; |
| 224 | } |
| 225 | |
| 226 | void |
| 227 | set_ui_file_rewind (struct ui_file *file, ui_file_rewind_ftype *rewind) |
| 228 | { |
| 229 | file->to_rewind = rewind; |
| 230 | } |
| 231 | |
| 232 | void |
| 233 | set_ui_file_put (struct ui_file *file, ui_file_put_ftype *put) |
| 234 | { |
| 235 | file->to_put = put; |
| 236 | } |
| 237 | |
| 238 | void |
| 239 | set_ui_file_write (struct ui_file *file, |
| 240 | ui_file_write_ftype *write) |
| 241 | { |
| 242 | file->to_write = write; |
| 243 | } |
| 244 | |
| 245 | void |
| 246 | set_ui_file_read (struct ui_file *file, ui_file_read_ftype *read) |
| 247 | { |
| 248 | file->to_read = read; |
| 249 | } |
| 250 | |
| 251 | void |
| 252 | set_ui_file_fputs (struct ui_file *file, ui_file_fputs_ftype *fputs) |
| 253 | { |
| 254 | file->to_fputs = fputs; |
| 255 | } |
| 256 | |
| 257 | void |
| 258 | set_ui_file_data (struct ui_file *file, void *data, |
| 259 | ui_file_delete_ftype *delete) |
| 260 | { |
| 261 | file->to_data = data; |
| 262 | file->to_delete = delete; |
| 263 | } |
| 264 | |
| 265 | /* ui_file utility function for converting a ``struct ui_file'' into |
| 266 | a memory buffer''. */ |
| 267 | |
| 268 | struct accumulated_ui_file |
| 269 | { |
| 270 | char *buffer; |
| 271 | long length; |
| 272 | }; |
| 273 | |
| 274 | static void |
| 275 | do_ui_file_xstrdup (void *context, const char *buffer, long length) |
| 276 | { |
| 277 | struct accumulated_ui_file *acc = context; |
| 278 | if (acc->buffer == NULL) |
| 279 | acc->buffer = xmalloc (length + 1); |
| 280 | else |
| 281 | acc->buffer = xrealloc (acc->buffer, acc->length + length + 1); |
| 282 | memcpy (acc->buffer + acc->length, buffer, length); |
| 283 | acc->length += length; |
| 284 | acc->buffer[acc->length] = '\0'; |
| 285 | } |
| 286 | |
| 287 | char * |
| 288 | ui_file_xstrdup (struct ui_file *file, |
| 289 | long *length) |
| 290 | { |
| 291 | struct accumulated_ui_file acc; |
| 292 | acc.buffer = NULL; |
| 293 | acc.length = 0; |
| 294 | ui_file_put (file, do_ui_file_xstrdup, &acc); |
| 295 | if (acc.buffer == NULL) |
| 296 | acc.buffer = xstrdup (""); |
| 297 | *length = acc.length; |
| 298 | return acc.buffer; |
| 299 | } |
| 300 | \f |
| 301 | /* A pure memory based ``struct ui_file'' that can be used an output |
| 302 | buffer. The buffers accumulated contents are available via |
| 303 | ui_file_put(). */ |
| 304 | |
| 305 | struct mem_file |
| 306 | { |
| 307 | int *magic; |
| 308 | char *buffer; |
| 309 | int sizeof_buffer; |
| 310 | int length_buffer; |
| 311 | }; |
| 312 | |
| 313 | static ui_file_rewind_ftype mem_file_rewind; |
| 314 | static ui_file_put_ftype mem_file_put; |
| 315 | static ui_file_write_ftype mem_file_write; |
| 316 | static ui_file_delete_ftype mem_file_delete; |
| 317 | static struct ui_file *mem_file_new (void); |
| 318 | static int mem_file_magic; |
| 319 | |
| 320 | static struct ui_file * |
| 321 | mem_file_new (void) |
| 322 | { |
| 323 | struct mem_file *stream = XMALLOC (struct mem_file); |
| 324 | struct ui_file *file = ui_file_new (); |
| 325 | set_ui_file_data (file, stream, mem_file_delete); |
| 326 | set_ui_file_rewind (file, mem_file_rewind); |
| 327 | set_ui_file_put (file, mem_file_put); |
| 328 | set_ui_file_write (file, mem_file_write); |
| 329 | stream->magic = &mem_file_magic; |
| 330 | stream->buffer = NULL; |
| 331 | stream->sizeof_buffer = 0; |
| 332 | stream->length_buffer = 0; |
| 333 | return file; |
| 334 | } |
| 335 | |
| 336 | static void |
| 337 | mem_file_delete (struct ui_file *file) |
| 338 | { |
| 339 | struct mem_file *stream = ui_file_data (file); |
| 340 | if (stream->magic != &mem_file_magic) |
| 341 | internal_error (__FILE__, __LINE__, |
| 342 | _("mem_file_delete: bad magic number")); |
| 343 | if (stream->buffer != NULL) |
| 344 | xfree (stream->buffer); |
| 345 | xfree (stream); |
| 346 | } |
| 347 | |
| 348 | struct ui_file * |
| 349 | mem_fileopen (void) |
| 350 | { |
| 351 | return mem_file_new (); |
| 352 | } |
| 353 | |
| 354 | static void |
| 355 | mem_file_rewind (struct ui_file *file) |
| 356 | { |
| 357 | struct mem_file *stream = ui_file_data (file); |
| 358 | if (stream->magic != &mem_file_magic) |
| 359 | internal_error (__FILE__, __LINE__, |
| 360 | _("mem_file_rewind: bad magic number")); |
| 361 | stream->length_buffer = 0; |
| 362 | } |
| 363 | |
| 364 | static void |
| 365 | mem_file_put (struct ui_file *file, |
| 366 | ui_file_put_method_ftype *write, |
| 367 | void *dest) |
| 368 | { |
| 369 | struct mem_file *stream = ui_file_data (file); |
| 370 | if (stream->magic != &mem_file_magic) |
| 371 | internal_error (__FILE__, __LINE__, |
| 372 | _("mem_file_put: bad magic number")); |
| 373 | if (stream->length_buffer > 0) |
| 374 | write (dest, stream->buffer, stream->length_buffer); |
| 375 | } |
| 376 | |
| 377 | void |
| 378 | mem_file_write (struct ui_file *file, |
| 379 | const char *buffer, |
| 380 | long length_buffer) |
| 381 | { |
| 382 | struct mem_file *stream = ui_file_data (file); |
| 383 | if (stream->magic != &mem_file_magic) |
| 384 | internal_error (__FILE__, __LINE__, |
| 385 | _("mem_file_write: bad magic number")); |
| 386 | if (stream->buffer == NULL) |
| 387 | { |
| 388 | stream->length_buffer = length_buffer; |
| 389 | stream->sizeof_buffer = length_buffer; |
| 390 | stream->buffer = xmalloc (stream->sizeof_buffer); |
| 391 | memcpy (stream->buffer, buffer, length_buffer); |
| 392 | } |
| 393 | else |
| 394 | { |
| 395 | int new_length = stream->length_buffer + length_buffer; |
| 396 | if (new_length >= stream->sizeof_buffer) |
| 397 | { |
| 398 | stream->sizeof_buffer = new_length; |
| 399 | stream->buffer = xrealloc (stream->buffer, stream->sizeof_buffer); |
| 400 | } |
| 401 | memcpy (stream->buffer + stream->length_buffer, buffer, length_buffer); |
| 402 | stream->length_buffer = new_length; |
| 403 | } |
| 404 | } |
| 405 | \f |
| 406 | /* ``struct ui_file'' implementation that maps directly onto |
| 407 | <stdio.h>'s FILE. */ |
| 408 | |
| 409 | static ui_file_write_ftype stdio_file_write; |
| 410 | static ui_file_fputs_ftype stdio_file_fputs; |
| 411 | static ui_file_read_ftype stdio_file_read; |
| 412 | static ui_file_isatty_ftype stdio_file_isatty; |
| 413 | static ui_file_delete_ftype stdio_file_delete; |
| 414 | static struct ui_file *stdio_file_new (FILE * file, int close_p); |
| 415 | static ui_file_flush_ftype stdio_file_flush; |
| 416 | |
| 417 | static int stdio_file_magic; |
| 418 | |
| 419 | struct stdio_file |
| 420 | { |
| 421 | int *magic; |
| 422 | FILE *file; |
| 423 | int close_p; |
| 424 | }; |
| 425 | |
| 426 | static struct ui_file * |
| 427 | stdio_file_new (FILE *file, int close_p) |
| 428 | { |
| 429 | struct ui_file *ui_file = ui_file_new (); |
| 430 | struct stdio_file *stdio = xmalloc (sizeof (struct stdio_file)); |
| 431 | stdio->magic = &stdio_file_magic; |
| 432 | stdio->file = file; |
| 433 | stdio->close_p = close_p; |
| 434 | set_ui_file_data (ui_file, stdio, stdio_file_delete); |
| 435 | set_ui_file_flush (ui_file, stdio_file_flush); |
| 436 | set_ui_file_write (ui_file, stdio_file_write); |
| 437 | set_ui_file_fputs (ui_file, stdio_file_fputs); |
| 438 | set_ui_file_read (ui_file, stdio_file_read); |
| 439 | set_ui_file_isatty (ui_file, stdio_file_isatty); |
| 440 | return ui_file; |
| 441 | } |
| 442 | |
| 443 | static void |
| 444 | stdio_file_delete (struct ui_file *file) |
| 445 | { |
| 446 | struct stdio_file *stdio = ui_file_data (file); |
| 447 | if (stdio->magic != &stdio_file_magic) |
| 448 | internal_error (__FILE__, __LINE__, |
| 449 | _("stdio_file_delete: bad magic number")); |
| 450 | if (stdio->close_p) |
| 451 | { |
| 452 | fclose (stdio->file); |
| 453 | } |
| 454 | xfree (stdio); |
| 455 | } |
| 456 | |
| 457 | static void |
| 458 | stdio_file_flush (struct ui_file *file) |
| 459 | { |
| 460 | struct stdio_file *stdio = ui_file_data (file); |
| 461 | if (stdio->magic != &stdio_file_magic) |
| 462 | internal_error (__FILE__, __LINE__, |
| 463 | _("stdio_file_flush: bad magic number")); |
| 464 | fflush (stdio->file); |
| 465 | } |
| 466 | |
| 467 | static long |
| 468 | stdio_file_read (struct ui_file *file, char *buf, long length_buf) |
| 469 | { |
| 470 | struct stdio_file *stdio = ui_file_data (file); |
| 471 | if (stdio->magic != &stdio_file_magic) |
| 472 | internal_error (__FILE__, __LINE__, |
| 473 | _("stdio_file_read: bad magic number")); |
| 474 | return read (fileno (stdio->file), buf, length_buf); |
| 475 | } |
| 476 | |
| 477 | static void |
| 478 | stdio_file_write (struct ui_file *file, const char *buf, long length_buf) |
| 479 | { |
| 480 | struct stdio_file *stdio = ui_file_data (file); |
| 481 | if (stdio->magic != &stdio_file_magic) |
| 482 | internal_error (__FILE__, __LINE__, |
| 483 | _("stdio_file_write: bad magic number")); |
| 484 | fwrite (buf, length_buf, 1, stdio->file); |
| 485 | } |
| 486 | |
| 487 | static void |
| 488 | stdio_file_fputs (const char *linebuffer, struct ui_file *file) |
| 489 | { |
| 490 | struct stdio_file *stdio = ui_file_data (file); |
| 491 | if (stdio->magic != &stdio_file_magic) |
| 492 | internal_error (__FILE__, __LINE__, |
| 493 | _("stdio_file_fputs: bad magic number")); |
| 494 | fputs (linebuffer, stdio->file); |
| 495 | } |
| 496 | |
| 497 | static int |
| 498 | stdio_file_isatty (struct ui_file *file) |
| 499 | { |
| 500 | struct stdio_file *stdio = ui_file_data (file); |
| 501 | if (stdio->magic != &stdio_file_magic) |
| 502 | internal_error (__FILE__, __LINE__, |
| 503 | _("stdio_file_isatty: bad magic number")); |
| 504 | return (isatty (fileno (stdio->file))); |
| 505 | } |
| 506 | |
| 507 | /* Like fdopen(). Create a ui_file from a previously opened FILE. */ |
| 508 | |
| 509 | struct ui_file * |
| 510 | stdio_fileopen (FILE *file) |
| 511 | { |
| 512 | return stdio_file_new (file, 0); |
| 513 | } |
| 514 | |
| 515 | struct ui_file * |
| 516 | gdb_fopen (char *name, char *mode) |
| 517 | { |
| 518 | FILE *f = fopen (name, mode); |
| 519 | if (f == NULL) |
| 520 | return NULL; |
| 521 | return stdio_file_new (f, 1); |
| 522 | } |
| 523 | |
| 524 | /* ``struct ui_file'' implementation that maps onto two ui-file objects. */ |
| 525 | |
| 526 | static ui_file_write_ftype tee_file_write; |
| 527 | static ui_file_fputs_ftype tee_file_fputs; |
| 528 | static ui_file_isatty_ftype tee_file_isatty; |
| 529 | static ui_file_delete_ftype tee_file_delete; |
| 530 | static ui_file_flush_ftype tee_file_flush; |
| 531 | |
| 532 | static int tee_file_magic; |
| 533 | |
| 534 | struct tee_file |
| 535 | { |
| 536 | int *magic; |
| 537 | struct ui_file *one, *two; |
| 538 | int close_one, close_two; |
| 539 | }; |
| 540 | |
| 541 | struct ui_file * |
| 542 | tee_file_new (struct ui_file *one, int close_one, |
| 543 | struct ui_file *two, int close_two) |
| 544 | { |
| 545 | struct ui_file *ui_file = ui_file_new (); |
| 546 | struct tee_file *tee = xmalloc (sizeof (struct tee_file)); |
| 547 | tee->magic = &tee_file_magic; |
| 548 | tee->one = one; |
| 549 | tee->two = two; |
| 550 | tee->close_one = close_one; |
| 551 | tee->close_two = close_two; |
| 552 | set_ui_file_data (ui_file, tee, tee_file_delete); |
| 553 | set_ui_file_flush (ui_file, tee_file_flush); |
| 554 | set_ui_file_write (ui_file, tee_file_write); |
| 555 | set_ui_file_fputs (ui_file, tee_file_fputs); |
| 556 | set_ui_file_isatty (ui_file, tee_file_isatty); |
| 557 | return ui_file; |
| 558 | } |
| 559 | |
| 560 | static void |
| 561 | tee_file_delete (struct ui_file *file) |
| 562 | { |
| 563 | struct tee_file *tee = ui_file_data (file); |
| 564 | if (tee->magic != &tee_file_magic) |
| 565 | internal_error (__FILE__, __LINE__, |
| 566 | _("tee_file_delete: bad magic number")); |
| 567 | if (tee->close_one) |
| 568 | ui_file_delete (tee->one); |
| 569 | if (tee->close_two) |
| 570 | ui_file_delete (tee->two); |
| 571 | |
| 572 | xfree (tee); |
| 573 | } |
| 574 | |
| 575 | static void |
| 576 | tee_file_flush (struct ui_file *file) |
| 577 | { |
| 578 | struct tee_file *tee = ui_file_data (file); |
| 579 | if (tee->magic != &tee_file_magic) |
| 580 | internal_error (__FILE__, __LINE__, |
| 581 | _("tee_file_flush: bad magic number")); |
| 582 | tee->one->to_flush (tee->one); |
| 583 | tee->two->to_flush (tee->two); |
| 584 | } |
| 585 | |
| 586 | static void |
| 587 | tee_file_write (struct ui_file *file, const char *buf, long length_buf) |
| 588 | { |
| 589 | struct tee_file *tee = ui_file_data (file); |
| 590 | if (tee->magic != &tee_file_magic) |
| 591 | internal_error (__FILE__, __LINE__, |
| 592 | _("tee_file_write: bad magic number")); |
| 593 | ui_file_write (tee->one, buf, length_buf); |
| 594 | ui_file_write (tee->two, buf, length_buf); |
| 595 | } |
| 596 | |
| 597 | static void |
| 598 | tee_file_fputs (const char *linebuffer, struct ui_file *file) |
| 599 | { |
| 600 | struct tee_file *tee = ui_file_data (file); |
| 601 | if (tee->magic != &tee_file_magic) |
| 602 | internal_error (__FILE__, __LINE__, |
| 603 | _("tee_file_fputs: bad magic number")); |
| 604 | tee->one->to_fputs (linebuffer, tee->one); |
| 605 | tee->two->to_fputs (linebuffer, tee->two); |
| 606 | } |
| 607 | |
| 608 | static int |
| 609 | tee_file_isatty (struct ui_file *file) |
| 610 | { |
| 611 | struct tee_file *tee = ui_file_data (file); |
| 612 | if (tee->magic != &tee_file_magic) |
| 613 | internal_error (__FILE__, __LINE__, |
| 614 | _("tee_file_isatty: bad magic number")); |
| 615 | return (0); |
| 616 | } |