Commit | Line | Data |
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f377b406 | 1 | /* TUI support I/O functions. |
f33c6cbf | 2 | |
42a4f53d | 3 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
f33c6cbf | 4 | |
f377b406 SC |
5 | Contributed by Hewlett-Packard Company. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
f377b406 SC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 21 | |
c906108c | 22 | #include "defs.h" |
a198b876 SC |
23 | #include "target.h" |
24 | #include "event-loop.h" | |
e09d2eba | 25 | #include "event-top.h" |
a198b876 SC |
26 | #include "command.h" |
27 | #include "top.h" | |
d7b2e967 AC |
28 | #include "tui/tui.h" |
29 | #include "tui/tui-data.h" | |
30 | #include "tui/tui-io.h" | |
31 | #include "tui/tui-command.h" | |
32 | #include "tui/tui-win.h" | |
33 | #include "tui/tui-wingeneral.h" | |
34 | #include "tui/tui-file.h" | |
112e8700 | 35 | #include "tui/tui-out.h" |
a198b876 SC |
36 | #include "ui-out.h" |
37 | #include "cli-out.h" | |
38 | #include <fcntl.h> | |
9d876a16 | 39 | #include <signal.h> |
3fff2c37 EZ |
40 | #ifdef __MINGW32__ |
41 | #include <windows.h> | |
42 | #endif | |
268a13a5 | 43 | #include "gdbsupport/filestuff.h" |
82083d6d | 44 | #include "completer.h" |
6a83354a | 45 | #include "gdb_curses.h" |
1d1d0bf7 | 46 | #include <map> |
a198b876 | 47 | |
4a1bcc8c MK |
48 | /* This redefines CTRL if it is not already defined, so it must come |
49 | after terminal state releated include files like <term.h> and | |
50 | "gdb_curses.h". */ | |
51 | #include "readline/readline.h" | |
52 | ||
3fff2c37 EZ |
53 | #ifdef __MINGW32__ |
54 | static SHORT ncurses_norm_attr; | |
55 | #endif | |
56 | ||
84371624 TT |
57 | static int tui_getc (FILE *fp); |
58 | ||
59 | static int | |
bcdf1568 AC |
60 | key_is_start_sequence (int ch) |
61 | { | |
62 | return (ch == 27); | |
63 | } | |
64 | ||
ec6f8892 SC |
65 | /* Use definition from readline 4.3. */ |
66 | #undef CTRL_CHAR | |
08ef48c5 MS |
67 | #define CTRL_CHAR(c) \ |
68 | ((c) < control_character_threshold && (((c) & 0x80) == 0)) | |
ec6f8892 | 69 | |
a198b876 SC |
70 | /* This file controls the IO interactions between gdb and curses. |
71 | When the TUI is enabled, gdb has two modes a curses and a standard | |
72 | mode. | |
73 | ||
1cc6d956 MS |
74 | In curses mode, the gdb outputs are made in a curses command |
75 | window. For this, the gdb_stdout and gdb_stderr are redirected to | |
76 | the specific ui_file implemented by TUI. The output is handled by | |
77 | tui_puts(). The input is also controlled by curses with | |
78 | tui_getc(). The readline library uses this function to get its | |
79 | input. Several readline hooks are installed to redirect readline | |
80 | output to the TUI (see also the note below). | |
a198b876 SC |
81 | |
82 | In normal mode, the gdb outputs are restored to their origin, that | |
83 | is as if TUI is not used. Readline also uses its original getc() | |
84 | function with stdin. | |
85 | ||
1cc6d956 MS |
86 | Note SCz/2001-07-21: the current readline is not clean in its |
87 | management of the output. Even if we install a redisplay handler, | |
88 | it sometimes writes on a stdout file. It is important to redirect | |
89 | every output produced by readline, otherwise the curses window will | |
90 | be garbled. This is implemented with a pipe that TUI reads and | |
91 | readline writes to. A gdb input handler is created so that reading | |
92 | the pipe is handled automatically. This will probably not work on | |
93 | non-Unix platforms. The best fix is to make readline clean enougth | |
94 | so that is never write on stdout. | |
95 | ||
96 | Note SCz/2002-09-01: we now use more readline hooks and it seems | |
97 | that with them we don't need the pipe anymore (verified by creating | |
98 | the pipe and closing its end so that write causes a SIGPIPE). The | |
99 | old pipe code is still there and can be conditionally removed by | |
8cee930b SC |
100 | #undef TUI_USE_PIPE_FOR_READLINE. */ |
101 | ||
102 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ | |
a156a290 | 103 | #ifdef HAVE_PIPE |
8cee930b | 104 | #define TUI_USE_PIPE_FOR_READLINE |
a156a290 | 105 | #endif |
1cc6d956 | 106 | /* #undef TUI_USE_PIPE_FOR_READLINE */ |
a198b876 SC |
107 | |
108 | /* TUI output files. */ | |
109 | static struct ui_file *tui_stdout; | |
110 | static struct ui_file *tui_stderr; | |
2b68e2c5 | 111 | struct ui_out *tui_out; |
a198b876 SC |
112 | |
113 | /* GDB output files in non-curses mode. */ | |
114 | static struct ui_file *tui_old_stdout; | |
115 | static struct ui_file *tui_old_stderr; | |
112e8700 | 116 | cli_ui_out *tui_old_uiout; |
a198b876 SC |
117 | |
118 | /* Readline previous hooks. */ | |
840ed64d JK |
119 | static rl_getc_func_t *tui_old_rl_getc_function; |
120 | static rl_voidfunc_t *tui_old_rl_redisplay_function; | |
121 | static rl_vintfunc_t *tui_old_rl_prep_terminal; | |
122 | static rl_voidfunc_t *tui_old_rl_deprep_terminal; | |
ef0b411a | 123 | static rl_compdisp_func_t *tui_old_rl_display_matches_hook; |
cc88a640 | 124 | static int tui_old_rl_echoing_p; |
a198b876 SC |
125 | |
126 | /* Readline output stream. | |
127 | Should be removed when readline is clean. */ | |
128 | static FILE *tui_rl_outstream; | |
129 | static FILE *tui_old_rl_outstream; | |
8cee930b | 130 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 131 | static int tui_readline_pipe[2]; |
8cee930b | 132 | #endif |
c906108c | 133 | |
57266a33 SC |
134 | /* The last gdb prompt that was registered in readline. |
135 | This may be the main gdb prompt or a secondary prompt. */ | |
136 | static char *tui_rl_saved_prompt; | |
137 | ||
9753a2f6 PA |
138 | /* Print a character in the curses command window. The output is |
139 | buffered. It is up to the caller to refresh the screen if | |
140 | necessary. */ | |
141 | ||
142 | static void | |
143 | do_tui_putc (WINDOW *w, char c) | |
144 | { | |
145 | static int tui_skip_line = -1; | |
146 | ||
147 | /* Catch annotation and discard them. We need two \032 and discard | |
148 | until a \n is seen. */ | |
149 | if (c == '\032') | |
150 | { | |
151 | tui_skip_line++; | |
152 | } | |
153 | else if (tui_skip_line != 1) | |
154 | { | |
155 | tui_skip_line = -1; | |
156 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ | |
157 | if (c == '\t') | |
158 | { | |
159 | int col; | |
160 | ||
161 | col = getcurx (w); | |
162 | do | |
163 | { | |
164 | waddch (w, ' '); | |
165 | col++; | |
166 | } | |
167 | while ((col % 8) != 0); | |
168 | } | |
169 | else | |
170 | waddch (w, c); | |
171 | } | |
172 | else if (c == '\n') | |
173 | tui_skip_line = -1; | |
174 | } | |
175 | ||
176 | /* Update the cached value of the command window's start line based on | |
177 | the window's current Y coordinate. */ | |
178 | ||
179 | static void | |
180 | update_cmdwin_start_line () | |
181 | { | |
81491aa0 | 182 | TUI_CMD_WIN->start_line |
cb2ce893 | 183 | = getcury (TUI_CMD_WIN->handle); |
9753a2f6 PA |
184 | } |
185 | ||
186 | /* Print a character in the curses command window. The output is | |
187 | buffered. It is up to the caller to refresh the screen if | |
188 | necessary. */ | |
189 | ||
8cee930b SC |
190 | static void |
191 | tui_putc (char c) | |
192 | { | |
cb2ce893 | 193 | WINDOW *w = TUI_CMD_WIN->handle; |
8cee930b | 194 | |
9753a2f6 PA |
195 | do_tui_putc (w, c); |
196 | update_cmdwin_start_line (); | |
8cee930b | 197 | } |
c906108c | 198 | |
1d1d0bf7 TT |
199 | /* This maps colors to their corresponding color index. */ |
200 | ||
201 | static std::map<ui_file_style::color, int> color_map; | |
202 | ||
203 | /* This holds a pair of colors and is used to track the mapping | |
204 | between a color pair index and the actual colors. */ | |
205 | ||
206 | struct color_pair | |
207 | { | |
208 | int fg; | |
209 | int bg; | |
210 | ||
211 | bool operator< (const color_pair &o) const | |
212 | { | |
213 | return fg < o.fg || (fg == o.fg && bg < o.bg); | |
214 | } | |
215 | }; | |
216 | ||
217 | /* This maps pairs of colors to their corresponding color pair | |
218 | index. */ | |
219 | ||
220 | static std::map<color_pair, int> color_pair_map; | |
221 | ||
222 | /* This is indexed by ANSI color offset from the base color, and holds | |
223 | the corresponding curses color constant. */ | |
224 | ||
225 | static const int curses_colors[] = { | |
226 | COLOR_BLACK, | |
227 | COLOR_RED, | |
228 | COLOR_GREEN, | |
229 | COLOR_YELLOW, | |
230 | COLOR_BLUE, | |
231 | COLOR_MAGENTA, | |
232 | COLOR_CYAN, | |
233 | COLOR_WHITE | |
234 | }; | |
235 | ||
236 | /* Given a color, find its index. */ | |
237 | ||
238 | static bool | |
239 | get_color (const ui_file_style::color &color, int *result) | |
240 | { | |
241 | if (color.is_none ()) | |
242 | *result = -1; | |
243 | else if (color.is_basic ()) | |
244 | *result = curses_colors[color.get_value ()]; | |
245 | else | |
246 | { | |
247 | auto it = color_map.find (color); | |
248 | if (it == color_map.end ()) | |
249 | { | |
250 | /* The first 8 colors are standard. */ | |
251 | int next = color_map.size () + 8; | |
252 | if (next >= COLORS) | |
253 | return false; | |
254 | uint8_t rgb[3]; | |
255 | color.get_rgb (rgb); | |
256 | /* We store RGB as 0..255, but curses wants 0..1000. */ | |
257 | if (init_color (next, rgb[0] * 1000 / 255, rgb[1] * 1000 / 255, | |
258 | rgb[2] * 1000 / 255) == ERR) | |
259 | return false; | |
260 | color_map[color] = next; | |
261 | *result = next; | |
262 | } | |
263 | else | |
264 | *result = it->second; | |
265 | } | |
266 | return true; | |
267 | } | |
268 | ||
269 | /* The most recently emitted color pair. */ | |
270 | ||
271 | static int last_color_pair = -1; | |
272 | ||
273 | /* The most recently applied style. */ | |
274 | ||
275 | static ui_file_style last_style; | |
276 | ||
55c10aca PA |
277 | /* If true, we're highlighting the current source line in reverse |
278 | video mode. */ | |
279 | static bool reverse_mode_p = false; | |
280 | ||
281 | /* The background/foreground colors before we entered reverse | |
282 | mode. */ | |
283 | static ui_file_style::color reverse_save_bg (ui_file_style::NONE); | |
284 | static ui_file_style::color reverse_save_fg (ui_file_style::NONE); | |
285 | ||
1d1d0bf7 TT |
286 | /* Given two colors, return their color pair index; making a new one |
287 | if necessary. */ | |
288 | ||
289 | static int | |
290 | get_color_pair (int fg, int bg) | |
291 | { | |
292 | color_pair c = { fg, bg }; | |
293 | auto it = color_pair_map.find (c); | |
294 | if (it == color_pair_map.end ()) | |
295 | { | |
296 | /* Color pair 0 is our default color, so new colors start at | |
297 | 1. */ | |
298 | int next = color_pair_map.size () + 1; | |
299 | /* Curses has a limited number of available color pairs. Fall | |
300 | back to the default if we've used too many. */ | |
301 | if (next >= COLOR_PAIRS) | |
302 | return 0; | |
303 | init_pair (next, fg, bg); | |
304 | color_pair_map[c] = next; | |
305 | return next; | |
306 | } | |
307 | return it->second; | |
308 | } | |
309 | ||
55c10aca | 310 | /* Apply STYLE to W. */ |
1d1d0bf7 | 311 | |
55c10aca PA |
312 | static void |
313 | apply_style (WINDOW *w, ui_file_style style) | |
1d1d0bf7 | 314 | { |
1d1d0bf7 TT |
315 | /* Reset. */ |
316 | wattron (w, A_NORMAL); | |
317 | wattroff (w, A_BOLD); | |
318 | wattroff (w, A_DIM); | |
319 | wattroff (w, A_REVERSE); | |
320 | if (last_color_pair != -1) | |
321 | wattroff (w, COLOR_PAIR (last_color_pair)); | |
322 | wattron (w, COLOR_PAIR (0)); | |
323 | ||
324 | const ui_file_style::color &fg = style.get_foreground (); | |
325 | const ui_file_style::color &bg = style.get_background (); | |
326 | if (!fg.is_none () || !bg.is_none ()) | |
327 | { | |
328 | int fgi, bgi; | |
329 | if (get_color (fg, &fgi) && get_color (bg, &bgi)) | |
330 | { | |
3fff2c37 EZ |
331 | #ifdef __MINGW32__ |
332 | /* MS-Windows port of ncurses doesn't support implicit | |
333 | default foreground and background colors, so we must | |
334 | specify them explicitly when needed, using the colors we | |
335 | saw at startup. */ | |
336 | if (fgi == -1) | |
337 | fgi = ncurses_norm_attr & 15; | |
338 | if (bgi == -1) | |
339 | bgi = (ncurses_norm_attr >> 4) & 15; | |
340 | #endif | |
1d1d0bf7 TT |
341 | int pair = get_color_pair (fgi, bgi); |
342 | if (last_color_pair != -1) | |
343 | wattroff (w, COLOR_PAIR (last_color_pair)); | |
344 | wattron (w, COLOR_PAIR (pair)); | |
345 | last_color_pair = pair; | |
346 | } | |
347 | } | |
348 | ||
349 | switch (style.get_intensity ()) | |
350 | { | |
351 | case ui_file_style::NORMAL: | |
352 | break; | |
353 | ||
354 | case ui_file_style::BOLD: | |
355 | wattron (w, A_BOLD); | |
356 | break; | |
357 | ||
358 | case ui_file_style::DIM: | |
359 | wattron (w, A_DIM); | |
360 | break; | |
361 | ||
362 | default: | |
363 | gdb_assert_not_reached ("invalid intensity"); | |
364 | } | |
365 | ||
366 | if (style.is_reverse ()) | |
367 | wattron (w, A_REVERSE); | |
368 | ||
369 | last_style = style; | |
55c10aca PA |
370 | } |
371 | ||
372 | /* Apply an ANSI escape sequence from BUF to W. BUF must start with | |
373 | the ESC character. If BUF does not start with an ANSI escape, | |
374 | return 0. Otherwise, apply the sequence if it is recognized, or | |
375 | simply ignore it if not. In this case, the number of bytes read | |
376 | from BUF is returned. */ | |
377 | ||
378 | static size_t | |
379 | apply_ansi_escape (WINDOW *w, const char *buf) | |
380 | { | |
381 | ui_file_style style = last_style; | |
382 | size_t n_read; | |
383 | ||
384 | if (!style.parse (buf, &n_read)) | |
385 | return n_read; | |
386 | ||
387 | if (reverse_mode_p) | |
388 | { | |
389 | /* We want to reverse _only_ the default foreground/background | |
390 | colors. If the foreground color is not the default (because | |
391 | the text was styled), we want to leave it as is. If e.g., | |
392 | the terminal is fg=BLACK, and bg=WHITE, and the style wants | |
393 | to print text in RED, we want to reverse the background color | |
394 | (print in BLACK), but still print the text in RED. To do | |
395 | that, we enable the A_REVERSE attribute, and re-reverse the | |
396 | parsed-style's fb/bg colors. | |
397 | ||
398 | Notes on the approach: | |
399 | ||
400 | - there's no portable way to know which colors the default | |
401 | fb/bg colors map to. | |
402 | ||
403 | - this approach does the right thing even if you change the | |
404 | terminal colors while GDB is running -- the reversed | |
405 | colors automatically adapt. | |
406 | */ | |
407 | if (!style.is_default ()) | |
408 | { | |
409 | ui_file_style::color bg = style.get_background (); | |
410 | ui_file_style::color fg = style.get_foreground (); | |
411 | style.set_fg (bg); | |
412 | style.set_bg (fg); | |
413 | } | |
414 | ||
415 | /* Enable A_REVERSE. */ | |
416 | style.set_reverse (true); | |
417 | } | |
418 | ||
419 | apply_style (w, style); | |
1d1d0bf7 TT |
420 | return n_read; |
421 | } | |
422 | ||
55c10aca PA |
423 | /* See tui.io.h. */ |
424 | ||
425 | void | |
426 | tui_set_reverse_mode (WINDOW *w, bool reverse) | |
427 | { | |
428 | ui_file_style style = last_style; | |
429 | ||
430 | reverse_mode_p = reverse; | |
431 | style.set_reverse (reverse); | |
432 | ||
433 | if (reverse) | |
434 | { | |
435 | reverse_save_bg = style.get_background (); | |
436 | reverse_save_fg = style.get_foreground (); | |
437 | } | |
438 | else | |
439 | { | |
440 | style.set_bg (reverse_save_bg); | |
441 | style.set_fg (reverse_save_fg); | |
442 | } | |
443 | ||
444 | apply_style (w, style); | |
445 | } | |
446 | ||
9753a2f6 PA |
447 | /* Print LENGTH characters from the buffer pointed to by BUF to the |
448 | curses command window. The output is buffered. It is up to the | |
449 | caller to refresh the screen if necessary. */ | |
450 | ||
451 | void | |
452 | tui_write (const char *buf, size_t length) | |
1d1d0bf7 TT |
453 | { |
454 | /* We need this to be \0-terminated for the regexp matching. */ | |
455 | std::string copy (buf, length); | |
456 | tui_puts (copy.c_str ()); | |
457 | } | |
458 | ||
459 | static void | |
62f29fda | 460 | tui_puts_internal (WINDOW *w, const char *string, int *height) |
9753a2f6 | 461 | { |
1d1d0bf7 TT |
462 | char c; |
463 | int prev_col = 0; | |
88b7e7cc | 464 | bool saw_nl = false; |
9753a2f6 | 465 | |
1d1d0bf7 TT |
466 | while ((c = *string++) != 0) |
467 | { | |
88b7e7cc TT |
468 | if (c == '\n') |
469 | saw_nl = true; | |
470 | ||
1d1d0bf7 TT |
471 | if (c == '\1' || c == '\2') |
472 | { | |
473 | /* Ignore these, they are readline escape-marking | |
474 | sequences. */ | |
475 | } | |
476 | else | |
477 | { | |
478 | if (c == '\033') | |
479 | { | |
480 | size_t bytes_read = apply_ansi_escape (w, string - 1); | |
481 | if (bytes_read > 0) | |
482 | { | |
483 | string = string + bytes_read - 1; | |
484 | continue; | |
485 | } | |
486 | } | |
487 | do_tui_putc (w, c); | |
488 | ||
489 | if (height != nullptr) | |
490 | { | |
491 | int col = getcurx (w); | |
492 | if (col <= prev_col) | |
493 | ++*height; | |
494 | prev_col = col; | |
495 | } | |
496 | } | |
497 | } | |
9753a2f6 | 498 | update_cmdwin_start_line (); |
88b7e7cc TT |
499 | if (saw_nl) |
500 | wrefresh (w); | |
9753a2f6 PA |
501 | } |
502 | ||
503 | /* Print a string in the curses command window. The output is | |
504 | buffered. It is up to the caller to refresh the screen if | |
505 | necessary. */ | |
518be979 | 506 | |
c906108c | 507 | void |
62f29fda | 508 | tui_puts (const char *string, WINDOW *w) |
c906108c | 509 | { |
62f29fda | 510 | if (w == nullptr) |
cb2ce893 | 511 | w = TUI_CMD_WIN->handle; |
62f29fda | 512 | tui_puts_internal (w, string, nullptr); |
a198b876 SC |
513 | } |
514 | ||
515 | /* Readline callback. | |
516 | Redisplay the command line with its prompt after readline has | |
517 | changed the edited text. */ | |
e09d2eba | 518 | void |
a198b876 SC |
519 | tui_redisplay_readline (void) |
520 | { | |
521 | int prev_col; | |
522 | int height; | |
cecc8b99 | 523 | int col; |
a198b876 SC |
524 | int c_pos; |
525 | int c_line; | |
526 | int in; | |
527 | WINDOW *w; | |
e6a959d6 | 528 | const char *prompt; |
a198b876 | 529 | int start_line; |
e3da6fc5 SC |
530 | |
531 | /* Detect when we temporarily left SingleKey and now the readline | |
1cc6d956 | 532 | edit buffer is empty, automatically restore the SingleKey |
9b8d6827 SC |
533 | mode. The restore must only be done if the command has finished. |
534 | The command could call prompt_for_continue and we must not | |
535 | restore SingleKey so that the prompt and normal keymap are used. */ | |
536 | if (tui_current_key_mode == TUI_ONE_COMMAND_MODE && rl_end == 0 | |
dbf30ca3 | 537 | && !gdb_in_secondary_prompt_p (current_ui)) |
6d012f14 | 538 | tui_set_key_mode (TUI_SINGLE_KEY_MODE); |
e3da6fc5 | 539 | |
6d012f14 | 540 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
e09d2eba SC |
541 | prompt = ""; |
542 | else | |
57266a33 | 543 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
544 | |
545 | c_pos = -1; | |
546 | c_line = -1; | |
cb2ce893 | 547 | w = TUI_CMD_WIN->handle; |
81491aa0 | 548 | start_line = TUI_CMD_WIN->start_line; |
a198b876 SC |
549 | wmove (w, start_line, 0); |
550 | prev_col = 0; | |
551 | height = 1; | |
1d1d0bf7 | 552 | if (prompt != nullptr) |
cb2ce893 | 553 | tui_puts_internal (TUI_CMD_WIN->handle, prompt, &height); |
1d1d0bf7 TT |
554 | |
555 | prev_col = getcurx (w); | |
588dcc3e | 556 | for (in = 0; in <= rl_end; in++) |
a198b876 SC |
557 | { |
558 | unsigned char c; | |
559 | ||
a198b876 SC |
560 | if (in == rl_point) |
561 | { | |
562 | getyx (w, c_line, c_pos); | |
563 | } | |
564 | ||
588dcc3e PP |
565 | if (in == rl_end) |
566 | break; | |
567 | ||
568 | c = (unsigned char) rl_line_buffer[in]; | |
a198b876 SC |
569 | if (CTRL_CHAR (c) || c == RUBOUT) |
570 | { | |
571 | waddch (w, '^'); | |
572 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
573 | } | |
312809f8 EZ |
574 | else if (c == '\t') |
575 | { | |
576 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ | |
cecc8b99 | 577 | col = getcurx (w); |
312809f8 EZ |
578 | do |
579 | { | |
580 | waddch (w, ' '); | |
581 | col++; | |
582 | } while ((col % 8) != 0); | |
583 | } | |
c906108c SS |
584 | else |
585 | { | |
a198b876 | 586 | waddch (w, c); |
c906108c | 587 | } |
a198b876 | 588 | if (c == '\n') |
81491aa0 | 589 | TUI_CMD_WIN->start_line = getcury (w); |
cecc8b99 | 590 | col = getcurx (w); |
a198b876 SC |
591 | if (col < prev_col) |
592 | height++; | |
593 | prev_col = col; | |
c906108c | 594 | } |
a198b876 | 595 | wclrtobot (w); |
81491aa0 | 596 | TUI_CMD_WIN->start_line = getcury (w); |
a198b876 | 597 | if (c_line >= 0) |
6f1cb6ea | 598 | wmove (w, c_line, c_pos); |
81491aa0 | 599 | TUI_CMD_WIN->start_line -= height - 1; |
a198b876 | 600 | |
a198b876 SC |
601 | wrefresh (w); |
602 | fflush(stdout); | |
603 | } | |
604 | ||
1cc6d956 MS |
605 | /* Readline callback to prepare the terminal. It is called once each |
606 | time we enter readline. Terminal is already setup in curses | |
607 | mode. */ | |
a198b876 | 608 | static void |
88fa91b4 | 609 | tui_prep_terminal (int notused1) |
c906108c | 610 | { |
57266a33 SC |
611 | /* Save the prompt registered in readline to correctly display it. |
612 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
613 | rl_prompt because it points to an alloca buffer). */ | |
614 | xfree (tui_rl_saved_prompt); | |
36d6eb95 | 615 | tui_rl_saved_prompt = rl_prompt != NULL ? xstrdup (rl_prompt) : NULL; |
a198b876 | 616 | } |
c906108c | 617 | |
1cc6d956 MS |
618 | /* Readline callback to restore the terminal. It is called once each |
619 | time we leave readline. There is nothing to do in curses mode. */ | |
a198b876 SC |
620 | static void |
621 | tui_deprep_terminal (void) | |
622 | { | |
623 | } | |
c906108c | 624 | |
8cee930b | 625 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
626 | /* Read readline output pipe and feed the command window with it. |
627 | Should be removed when readline is clean. */ | |
628 | static void | |
01f69b38 | 629 | tui_readline_output (int error, gdb_client_data data) |
a198b876 SC |
630 | { |
631 | int size; | |
632 | char buf[256]; | |
c906108c | 633 | |
a198b876 SC |
634 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
635 | if (size > 0 && tui_active) | |
c906108c | 636 | { |
a198b876 SC |
637 | buf[size] = 0; |
638 | tui_puts (buf); | |
c906108c | 639 | } |
a198b876 | 640 | } |
8cee930b SC |
641 | #endif |
642 | ||
82083d6d | 643 | /* TUI version of displayer.crlf. */ |
8cee930b | 644 | |
82083d6d DE |
645 | static void |
646 | tui_mld_crlf (const struct match_list_displayer *displayer) | |
8cee930b | 647 | { |
82083d6d | 648 | tui_putc ('\n'); |
8cee930b SC |
649 | } |
650 | ||
82083d6d | 651 | /* TUI version of displayer.putch. */ |
8cee930b | 652 | |
82083d6d DE |
653 | static void |
654 | tui_mld_putch (const struct match_list_displayer *displayer, int ch) | |
8cee930b | 655 | { |
82083d6d | 656 | tui_putc (ch); |
8cee930b SC |
657 | } |
658 | ||
82083d6d DE |
659 | /* TUI version of displayer.puts. */ |
660 | ||
661 | static void | |
662 | tui_mld_puts (const struct match_list_displayer *displayer, const char *s) | |
8cee930b | 663 | { |
82083d6d DE |
664 | tui_puts (s); |
665 | } | |
8cee930b | 666 | |
82083d6d DE |
667 | /* TUI version of displayer.flush. */ |
668 | ||
669 | static void | |
670 | tui_mld_flush (const struct match_list_displayer *displayer) | |
671 | { | |
cb2ce893 | 672 | wrefresh (TUI_CMD_WIN->handle); |
8cee930b SC |
673 | } |
674 | ||
82083d6d | 675 | /* TUI version of displayer.erase_entire_line. */ |
8cee930b | 676 | |
8cee930b | 677 | static void |
82083d6d | 678 | tui_mld_erase_entire_line (const struct match_list_displayer *displayer) |
8cee930b | 679 | { |
cb2ce893 | 680 | WINDOW *w = TUI_CMD_WIN->handle; |
6f1cb6ea | 681 | int cur_y = getcury (w); |
8cee930b | 682 | |
6f1cb6ea | 683 | wmove (w, cur_y, 0); |
82083d6d | 684 | wclrtoeol (w); |
6f1cb6ea | 685 | wmove (w, cur_y, 0); |
82083d6d | 686 | } |
8cee930b | 687 | |
82083d6d | 688 | /* TUI version of displayer.beep. */ |
8cee930b | 689 | |
82083d6d DE |
690 | static void |
691 | tui_mld_beep (const struct match_list_displayer *displayer) | |
692 | { | |
693 | beep (); | |
694 | } | |
695 | ||
7a956928 TT |
696 | /* A wrapper for wgetch that enters nonl mode. We We normally want |
697 | curses' "nl" mode, but when reading from the user, we'd like to | |
698 | differentiate between C-j and C-m, because some users bind these | |
699 | keys differently in their .inputrc. So, put curses into nonl mode | |
700 | just when reading from the user. See PR tui/20819. */ | |
701 | ||
702 | static int | |
703 | gdb_wgetch (WINDOW *win) | |
704 | { | |
705 | nonl (); | |
706 | int r = wgetch (win); | |
707 | nl (); | |
708 | return r; | |
709 | } | |
710 | ||
82083d6d DE |
711 | /* Helper function for tui_mld_read_key. |
712 | This temporarily replaces tui_getc for use during tab-completion | |
713 | match list display. */ | |
714 | ||
715 | static int | |
716 | tui_mld_getc (FILE *fp) | |
717 | { | |
cb2ce893 | 718 | WINDOW *w = TUI_CMD_WIN->handle; |
7a956928 | 719 | int c = gdb_wgetch (w); |
8cee930b | 720 | |
82083d6d DE |
721 | return c; |
722 | } | |
8cee930b | 723 | |
82083d6d | 724 | /* TUI version of displayer.read_key. */ |
8cee930b | 725 | |
82083d6d DE |
726 | static int |
727 | tui_mld_read_key (const struct match_list_displayer *displayer) | |
728 | { | |
729 | rl_getc_func_t *prev = rl_getc_function; | |
730 | int c; | |
8cee930b | 731 | |
82083d6d DE |
732 | /* We can't use tui_getc as we need NEWLINE to not get emitted. */ |
733 | rl_getc_function = tui_mld_getc; | |
734 | c = rl_read_key (); | |
735 | rl_getc_function = prev; | |
736 | return c; | |
737 | } | |
8cee930b | 738 | |
82083d6d DE |
739 | /* TUI version of rl_completion_display_matches_hook. |
740 | See gdb_display_match_list for a description of the arguments. */ | |
8cee930b | 741 | |
82083d6d DE |
742 | static void |
743 | tui_rl_display_match_list (char **matches, int len, int max) | |
744 | { | |
745 | struct match_list_displayer displayer; | |
746 | ||
747 | rl_get_screen_size (&displayer.height, &displayer.width); | |
748 | displayer.crlf = tui_mld_crlf; | |
749 | displayer.putch = tui_mld_putch; | |
750 | displayer.puts = tui_mld_puts; | |
751 | displayer.flush = tui_mld_flush; | |
752 | displayer.erase_entire_line = tui_mld_erase_entire_line; | |
753 | displayer.beep = tui_mld_beep; | |
754 | displayer.read_key = tui_mld_read_key; | |
755 | ||
756 | gdb_display_match_list (matches, len, max, &displayer); | |
8cee930b | 757 | } |
a198b876 SC |
758 | |
759 | /* Setup the IO for curses or non-curses mode. | |
760 | - In non-curses mode, readline and gdb use the standard input and | |
761 | standard output/error directly. | |
762 | - In curses mode, the standard output/error is controlled by TUI | |
763 | with the tui_stdout and tui_stderr. The output is redirected in | |
764 | the curses command window. Several readline callbacks are installed | |
765 | so that readline asks for its input to the curses command window | |
766 | with wgetch(). */ | |
767 | void | |
768 | tui_setup_io (int mode) | |
769 | { | |
cc88a640 JK |
770 | extern int _rl_echoing_p; |
771 | ||
a198b876 | 772 | if (mode) |
c906108c | 773 | { |
a198b876 SC |
774 | /* Redirect readline to TUI. */ |
775 | tui_old_rl_redisplay_function = rl_redisplay_function; | |
776 | tui_old_rl_deprep_terminal = rl_deprep_term_function; | |
777 | tui_old_rl_prep_terminal = rl_prep_term_function; | |
778 | tui_old_rl_getc_function = rl_getc_function; | |
ef0b411a | 779 | tui_old_rl_display_matches_hook = rl_completion_display_matches_hook; |
a198b876 | 780 | tui_old_rl_outstream = rl_outstream; |
cc88a640 | 781 | tui_old_rl_echoing_p = _rl_echoing_p; |
a198b876 SC |
782 | rl_redisplay_function = tui_redisplay_readline; |
783 | rl_deprep_term_function = tui_deprep_terminal; | |
784 | rl_prep_term_function = tui_prep_terminal; | |
785 | rl_getc_function = tui_getc; | |
cc88a640 | 786 | _rl_echoing_p = 0; |
a198b876 SC |
787 | rl_outstream = tui_rl_outstream; |
788 | rl_prompt = 0; | |
8cee930b SC |
789 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
790 | rl_already_prompted = 0; | |
a198b876 SC |
791 | |
792 | /* Keep track of previous gdb output. */ | |
793 | tui_old_stdout = gdb_stdout; | |
794 | tui_old_stderr = gdb_stderr; | |
112e8700 SM |
795 | tui_old_uiout = dynamic_cast<cli_ui_out *> (current_uiout); |
796 | gdb_assert (tui_old_uiout != nullptr); | |
a198b876 SC |
797 | |
798 | /* Reconfigure gdb output. */ | |
799 | gdb_stdout = tui_stdout; | |
800 | gdb_stderr = tui_stderr; | |
801 | gdb_stdlog = gdb_stdout; /* for moment */ | |
802 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 803 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 804 | current_uiout = tui_out; |
9d876a16 SC |
805 | |
806 | /* Save tty for SIGCONT. */ | |
807 | savetty (); | |
c906108c | 808 | } |
a198b876 | 809 | else |
c906108c | 810 | { |
a198b876 SC |
811 | /* Restore gdb output. */ |
812 | gdb_stdout = tui_old_stdout; | |
813 | gdb_stderr = tui_old_stderr; | |
814 | gdb_stdlog = gdb_stdout; /* for moment */ | |
815 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 816 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 817 | current_uiout = tui_old_uiout; |
a198b876 SC |
818 | |
819 | /* Restore readline. */ | |
820 | rl_redisplay_function = tui_old_rl_redisplay_function; | |
821 | rl_deprep_term_function = tui_old_rl_deprep_terminal; | |
822 | rl_prep_term_function = tui_old_rl_prep_terminal; | |
823 | rl_getc_function = tui_old_rl_getc_function; | |
ef0b411a | 824 | rl_completion_display_matches_hook = tui_old_rl_display_matches_hook; |
a198b876 | 825 | rl_outstream = tui_old_rl_outstream; |
cc88a640 | 826 | _rl_echoing_p = tui_old_rl_echoing_p; |
bd9b0abf | 827 | rl_already_prompted = 0; |
9d876a16 SC |
828 | |
829 | /* Save tty for SIGCONT. */ | |
830 | savetty (); | |
1d1d0bf7 TT |
831 | |
832 | /* Clean up color information. */ | |
833 | last_color_pair = -1; | |
834 | last_style = ui_file_style (); | |
835 | color_map.clear (); | |
836 | color_pair_map.clear (); | |
9d876a16 SC |
837 | } |
838 | } | |
839 | ||
840 | #ifdef SIGCONT | |
841 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ | |
842 | static void | |
843 | tui_cont_sig (int sig) | |
844 | { | |
845 | if (tui_active) | |
846 | { | |
847 | /* Restore the terminal setting because another process (shell) | |
848 | might have changed it. */ | |
849 | resetty (); | |
850 | ||
851 | /* Force a refresh of the screen. */ | |
a21fcd8f | 852 | tui_refresh_all_win (); |
d75e970c | 853 | |
cb2ce893 | 854 | wrefresh (TUI_CMD_WIN->handle); |
c906108c | 855 | } |
9d876a16 | 856 | signal (sig, tui_cont_sig); |
a198b876 | 857 | } |
9d876a16 | 858 | #endif |
c906108c | 859 | |
a198b876 SC |
860 | /* Initialize the IO for gdb in curses mode. */ |
861 | void | |
d02c80cd | 862 | tui_initialize_io (void) |
a198b876 | 863 | { |
9d876a16 SC |
864 | #ifdef SIGCONT |
865 | signal (SIGCONT, tui_cont_sig); | |
866 | #endif | |
867 | ||
a198b876 | 868 | /* Create tui output streams. */ |
d7e74731 PA |
869 | tui_stdout = new tui_file (stdout); |
870 | tui_stderr = new tui_file (stderr); | |
a198b876 SC |
871 | tui_out = tui_out_new (tui_stdout); |
872 | ||
43df09d9 | 873 | /* Create the default UI. */ |
4801a9a3 | 874 | tui_old_uiout = cli_out_new (gdb_stdout); |
a198b876 | 875 | |
8cee930b | 876 | #ifdef TUI_USE_PIPE_FOR_READLINE |
1cc6d956 MS |
877 | /* Temporary solution for readline writing to stdout: redirect |
878 | readline output in a pipe, read that pipe and output the content | |
879 | in the curses command window. */ | |
614c279d | 880 | if (gdb_pipe_cloexec (tui_readline_pipe) != 0) |
e0e6bcab GB |
881 | error (_("Cannot create pipe for readline")); |
882 | ||
a198b876 SC |
883 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
884 | if (tui_rl_outstream == 0) | |
e0e6bcab GB |
885 | error (_("Cannot redirect readline output")); |
886 | ||
cafb3438 | 887 | setvbuf (tui_rl_outstream, NULL, _IOLBF, 0); |
c906108c | 888 | |
a198b876 SC |
889 | #ifdef O_NONBLOCK |
890 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 891 | #else |
a198b876 SC |
892 | #ifdef O_NDELAY |
893 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 894 | #endif |
a198b876 | 895 | #endif |
a198b876 | 896 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
897 | #else |
898 | tui_rl_outstream = stdout; | |
899 | #endif | |
3fff2c37 EZ |
900 | |
901 | #ifdef __MINGW32__ | |
902 | /* MS-Windows port of ncurses doesn't support default foreground and | |
903 | background colors, so we must record the default colors at startup. */ | |
904 | HANDLE hstdout = (HANDLE)_get_osfhandle (fileno (stdout)); | |
905 | DWORD cmode; | |
906 | CONSOLE_SCREEN_BUFFER_INFO csbi; | |
907 | ||
908 | if (hstdout != INVALID_HANDLE_VALUE | |
909 | && GetConsoleMode (hstdout, &cmode) != 0 | |
910 | && GetConsoleScreenBufferInfo (hstdout, &csbi)) | |
911 | ncurses_norm_attr = csbi.wAttributes; | |
912 | #endif | |
a198b876 SC |
913 | } |
914 | ||
2d8b51cb TT |
915 | /* Dispatch the correct tui function based upon the control |
916 | character. */ | |
917 | static unsigned int | |
918 | tui_dispatch_ctrl_char (unsigned int ch) | |
919 | { | |
920 | struct tui_win_info *win_info = tui_win_with_focus (); | |
921 | ||
922 | /* Handle the CTRL-L refresh for each window. */ | |
923 | if (ch == '\f') | |
924 | tui_refresh_all_win (); | |
925 | ||
926 | /* If no window has the focus, or if the focus window can't scroll, | |
927 | just pass the character through. */ | |
928 | if (win_info == NULL || !win_info->can_scroll ()) | |
929 | return ch; | |
930 | ||
931 | switch (ch) | |
932 | { | |
933 | case KEY_NPAGE: | |
934 | win_info->forward_scroll (0); | |
935 | break; | |
936 | case KEY_PPAGE: | |
937 | win_info->backward_scroll (0); | |
938 | break; | |
939 | case KEY_DOWN: | |
940 | case KEY_SF: | |
941 | win_info->forward_scroll (1); | |
942 | break; | |
943 | case KEY_UP: | |
944 | case KEY_SR: | |
945 | win_info->backward_scroll (1); | |
946 | break; | |
947 | case KEY_RIGHT: | |
948 | win_info->left_scroll (1); | |
949 | break; | |
950 | case KEY_LEFT: | |
951 | win_info->right_scroll (1); | |
952 | break; | |
953 | case '\f': | |
954 | break; | |
955 | default: | |
956 | /* We didn't recognize the character as a control character, so pass it | |
957 | through. */ | |
958 | return ch; | |
959 | } | |
960 | ||
961 | /* We intercepted the control character, so return 0 (which readline | |
962 | will interpret as a no-op). */ | |
963 | return 0; | |
964 | } | |
965 | ||
1cc6d956 MS |
966 | /* Get a character from the command window. This is called from the |
967 | readline package. */ | |
84371624 | 968 | static int |
a198b876 SC |
969 | tui_getc (FILE *fp) |
970 | { | |
971 | int ch; | |
972 | WINDOW *w; | |
973 | ||
cb2ce893 | 974 | w = TUI_CMD_WIN->handle; |
a198b876 | 975 | |
8cee930b | 976 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 977 | /* Flush readline output. */ |
01f69b38 | 978 | tui_readline_output (0, 0); |
8cee930b SC |
979 | #endif |
980 | ||
7a956928 | 981 | ch = gdb_wgetch (w); |
c906108c | 982 | |
1cc6d956 MS |
983 | /* The \n must be echoed because it will not be printed by |
984 | readline. */ | |
b17c4cd0 | 985 | if (ch == '\n' || ch == '\r') |
a198b876 SC |
986 | { |
987 | /* When hitting return with an empty input, gdb executes the last | |
988 | command. If we emit a newline, this fills up the command window | |
989 | with empty lines with gdb prompt at beginning. Instead of that, | |
990 | stay on the same line but provide a visual effect to show the | |
991 | user we recognized the command. */ | |
dbf30ca3 | 992 | if (rl_end == 0 && !gdb_in_secondary_prompt_p (current_ui)) |
a198b876 | 993 | { |
6f1cb6ea | 994 | wmove (w, getcury (w), 0); |
a198b876 SC |
995 | |
996 | /* Clear the line. This will blink the gdb prompt since | |
997 | it will be redrawn at the same line. */ | |
998 | wclrtoeol (w); | |
999 | wrefresh (w); | |
1000 | napms (20); | |
1001 | } | |
1002 | else | |
1003 | { | |
d9080678 PP |
1004 | /* Move cursor to the end of the command line before emitting the |
1005 | newline. We need to do so because when ncurses outputs a newline | |
1006 | it truncates any text that appears past the end of the cursor. */ | |
6f1cb6ea PP |
1007 | int px, py; |
1008 | getyx (w, py, px); | |
d9080678 | 1009 | px += rl_end - rl_point; |
cb2ce893 TT |
1010 | py += px / TUI_CMD_WIN->width; |
1011 | px %= TUI_CMD_WIN->width; | |
d9080678 | 1012 | wmove (w, py, px); |
7a8bcb88 | 1013 | tui_putc ('\n'); |
a198b876 SC |
1014 | } |
1015 | } | |
1016 | ||
69efdff1 PP |
1017 | /* Handle prev/next/up/down here. */ |
1018 | ch = tui_dispatch_ctrl_char (ch); | |
a198b876 | 1019 | |
a198b876 SC |
1020 | if (ch == KEY_BACKSPACE) |
1021 | return '\b'; | |
d64e57fa | 1022 | |
3c216924 | 1023 | if (current_ui->command_editing && key_is_start_sequence (ch)) |
d64e57fa PP |
1024 | { |
1025 | int ch_pending; | |
1026 | ||
1027 | nodelay (w, TRUE); | |
7a956928 | 1028 | ch_pending = gdb_wgetch (w); |
d64e57fa PP |
1029 | nodelay (w, FALSE); |
1030 | ||
1031 | /* If we have pending input following a start sequence, call the stdin | |
1032 | event handler again because ncurses may have already read and stored | |
1033 | the input into its internal buffer, meaning that we won't get an stdin | |
1034 | event for it. If we don't compensate for this missed stdin event, key | |
1035 | sequences as Alt_F (^[f) will not behave promptly. | |
1036 | ||
1037 | (We only compensates for the missed 2nd byte of a key sequence because | |
1038 | 2-byte sequences are by far the most commonly used. ncurses may have | |
1039 | buffered a larger, 3+-byte key sequence though it remains to be seen | |
1040 | whether it is useful to compensate for all the bytes of such | |
1041 | sequences.) */ | |
1042 | if (ch_pending != ERR) | |
1043 | { | |
1044 | ungetch (ch_pending); | |
1045 | call_stdin_event_handler_again_p = 1; | |
1046 | } | |
1047 | } | |
1048 | ||
c906108c | 1049 | return ch; |
a198b876 | 1050 | } |
c906108c | 1051 | |
312809f8 EZ |
1052 | /* Utility function to expand TABs in a STRING into spaces. STRING |
1053 | will be displayed starting at column COL, and is assumed to include | |
1054 | no newlines. The returned expanded string is malloc'ed. */ | |
1055 | ||
1056 | char * | |
1057 | tui_expand_tabs (const char *string, int col) | |
1058 | { | |
b1a0f704 | 1059 | int n_adjust, ncol; |
312809f8 EZ |
1060 | const char *s; |
1061 | char *ret, *q; | |
1062 | ||
1063 | /* 1. How many additional characters do we need? */ | |
b1a0f704 | 1064 | for (ncol = col, n_adjust = 0, s = string; s; ) |
312809f8 EZ |
1065 | { |
1066 | s = strpbrk (s, "\t"); | |
1067 | if (s) | |
1068 | { | |
b1a0f704 | 1069 | ncol += (s - string) + n_adjust; |
312809f8 EZ |
1070 | /* Adjustment for the next tab stop, minus one for the TAB |
1071 | we replace with spaces. */ | |
b1a0f704 | 1072 | n_adjust += 8 - (ncol % 8) - 1; |
312809f8 EZ |
1073 | s++; |
1074 | } | |
1075 | } | |
1076 | ||
1077 | /* Allocate the copy. */ | |
224c3ddb | 1078 | ret = q = (char *) xmalloc (strlen (string) + n_adjust + 1); |
312809f8 EZ |
1079 | |
1080 | /* 2. Copy the original string while replacing TABs with spaces. */ | |
b1a0f704 | 1081 | for (ncol = col, s = string; s; ) |
312809f8 | 1082 | { |
cd46431b | 1083 | const char *s1 = strpbrk (s, "\t"); |
312809f8 EZ |
1084 | if (s1) |
1085 | { | |
1086 | if (s1 > s) | |
1087 | { | |
1088 | strncpy (q, s, s1 - s); | |
1089 | q += s1 - s; | |
b1a0f704 | 1090 | ncol += s1 - s; |
312809f8 EZ |
1091 | } |
1092 | do { | |
1093 | *q++ = ' '; | |
b1a0f704 EZ |
1094 | ncol++; |
1095 | } while ((ncol % 8) != 0); | |
312809f8 EZ |
1096 | s1++; |
1097 | } | |
1098 | else | |
1099 | strcpy (q, s); | |
1100 | s = s1; | |
1101 | } | |
1102 | ||
1103 | return ret; | |
1104 | } |