1 | // This is an open source non-commercial project. Dear PVS-Studio, please check |
2 | // it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com |
3 | |
4 | |
5 | #include "nvim/tui/input.h" |
6 | #include "nvim/vim.h" |
7 | #include "nvim/api/vim.h" |
8 | #include "nvim/api/private/helpers.h" |
9 | #include "nvim/ascii.h" |
10 | #include "nvim/charset.h" |
11 | #include "nvim/main.h" |
12 | #include "nvim/aucmd.h" |
13 | #include "nvim/ex_docmd.h" |
14 | #include "nvim/option.h" |
15 | #include "nvim/os/os.h" |
16 | #include "nvim/os/input.h" |
17 | #include "nvim/event/rstream.h" |
18 | |
19 | #define KEY_BUFFER_SIZE 0xfff |
20 | |
21 | #ifdef INCLUDE_GENERATED_DECLARATIONS |
22 | # include "tui/input.c.generated.h" |
23 | #endif |
24 | |
25 | void tinput_init(TermInput *input, Loop *loop) |
26 | { |
27 | input->loop = loop; |
28 | input->paste = 0; |
29 | input->in_fd = 0; |
30 | input->key_buffer = rbuffer_new(KEY_BUFFER_SIZE); |
31 | uv_mutex_init(&input->key_buffer_mutex); |
32 | uv_cond_init(&input->key_buffer_cond); |
33 | |
34 | // If stdin is not a pty, switch to stderr. For cases like: |
35 | // echo q | nvim -es |
36 | // ls *.md | xargs nvim |
37 | #ifdef WIN32 |
38 | if (!os_isatty(0)) { |
39 | const HANDLE conin_handle = CreateFile("CONIN$" , |
40 | GENERIC_READ | GENERIC_WRITE, |
41 | FILE_SHARE_READ | FILE_SHARE_WRITE, |
42 | (LPSECURITY_ATTRIBUTES)NULL, |
43 | OPEN_EXISTING, 0, (HANDLE)NULL); |
44 | input->in_fd = _open_osfhandle(conin_handle, _O_RDONLY); |
45 | assert(input->in_fd != -1); |
46 | } |
47 | #else |
48 | if (!os_isatty(0) && os_isatty(2)) { |
49 | input->in_fd = 2; |
50 | } |
51 | #endif |
52 | input_global_fd_init(input->in_fd); |
53 | |
54 | const char *term = os_getenv("TERM" ); |
55 | if (!term) { |
56 | term = "" ; // termkey_new_abstract assumes non-null (#2745) |
57 | } |
58 | |
59 | #if TERMKEY_VERSION_MAJOR > 0 || TERMKEY_VERSION_MINOR > 18 |
60 | input->tk = termkey_new_abstract(term, |
61 | TERMKEY_FLAG_UTF8 | TERMKEY_FLAG_NOSTART); |
62 | termkey_hook_terminfo_getstr(input->tk, input->tk_ti_hook_fn, NULL); |
63 | termkey_start(input->tk); |
64 | #else |
65 | input->tk = termkey_new_abstract(term, TERMKEY_FLAG_UTF8); |
66 | #endif |
67 | |
68 | int curflags = termkey_get_canonflags(input->tk); |
69 | termkey_set_canonflags(input->tk, curflags | TERMKEY_CANON_DELBS); |
70 | |
71 | // setup input handle |
72 | rstream_init_fd(loop, &input->read_stream, input->in_fd, 0xfff); |
73 | // initialize a timer handle for handling ESC with libtermkey |
74 | time_watcher_init(loop, &input->timer_handle, input); |
75 | } |
76 | |
77 | void tinput_destroy(TermInput *input) |
78 | { |
79 | rbuffer_free(input->key_buffer); |
80 | uv_mutex_destroy(&input->key_buffer_mutex); |
81 | uv_cond_destroy(&input->key_buffer_cond); |
82 | time_watcher_close(&input->timer_handle, NULL); |
83 | stream_close(&input->read_stream, NULL, NULL); |
84 | termkey_destroy(input->tk); |
85 | } |
86 | |
87 | void tinput_start(TermInput *input) |
88 | { |
89 | rstream_start(&input->read_stream, tinput_read_cb, input); |
90 | } |
91 | |
92 | void tinput_stop(TermInput *input) |
93 | { |
94 | rstream_stop(&input->read_stream); |
95 | time_watcher_stop(&input->timer_handle); |
96 | } |
97 | |
98 | static void tinput_done_event(void **argv) |
99 | { |
100 | input_done(); |
101 | } |
102 | |
103 | static void tinput_wait_enqueue(void **argv) |
104 | { |
105 | TermInput *input = argv[0]; |
106 | RBUFFER_UNTIL_EMPTY(input->key_buffer, buf, len) { |
107 | const String keys = { .data = buf, .size = len }; |
108 | if (input->paste) { |
109 | String copy = copy_string(keys); |
110 | multiqueue_put(main_loop.events, tinput_paste_event, 3, |
111 | copy.data, copy.size, (intptr_t)input->paste); |
112 | if (input->paste == 1) { |
113 | // Paste phase: "continue" |
114 | input->paste = 2; |
115 | } |
116 | rbuffer_consumed(input->key_buffer, len); |
117 | rbuffer_reset(input->key_buffer); |
118 | } else { |
119 | const size_t consumed = input_enqueue(keys); |
120 | if (consumed) { |
121 | rbuffer_consumed(input->key_buffer, consumed); |
122 | } |
123 | rbuffer_reset(input->key_buffer); |
124 | if (consumed < len) { |
125 | break; |
126 | } |
127 | } |
128 | } |
129 | uv_mutex_lock(&input->key_buffer_mutex); |
130 | input->waiting = false; |
131 | uv_cond_signal(&input->key_buffer_cond); |
132 | uv_mutex_unlock(&input->key_buffer_mutex); |
133 | } |
134 | |
135 | static void tinput_paste_event(void **argv) |
136 | { |
137 | String keys = { .data = argv[0], .size = (size_t)argv[1] }; |
138 | intptr_t phase = (intptr_t)argv[2]; |
139 | |
140 | Error err = ERROR_INIT; |
141 | nvim_paste(keys, true, phase, &err); |
142 | if (ERROR_SET(&err)) { |
143 | emsgf("paste: %s" , err.msg); |
144 | api_clear_error(&err); |
145 | } |
146 | |
147 | api_free_string(keys); |
148 | } |
149 | |
150 | static void tinput_flush(TermInput *input, bool wait_until_empty) |
151 | { |
152 | size_t drain_boundary = wait_until_empty ? 0 : 0xff; |
153 | do { |
154 | uv_mutex_lock(&input->key_buffer_mutex); |
155 | loop_schedule_fast(&main_loop, event_create(tinput_wait_enqueue, 1, input)); |
156 | input->waiting = true; |
157 | while (input->waiting) { |
158 | uv_cond_wait(&input->key_buffer_cond, &input->key_buffer_mutex); |
159 | } |
160 | uv_mutex_unlock(&input->key_buffer_mutex); |
161 | } while (rbuffer_size(input->key_buffer) > drain_boundary); |
162 | } |
163 | |
164 | static void tinput_enqueue(TermInput *input, char *buf, size_t size) |
165 | { |
166 | if (rbuffer_size(input->key_buffer) > |
167 | rbuffer_capacity(input->key_buffer) - 0xff) { |
168 | // don't ever let the buffer get too full or we risk putting incomplete keys |
169 | // into it |
170 | tinput_flush(input, false); |
171 | } |
172 | rbuffer_write(input->key_buffer, buf, size); |
173 | } |
174 | |
175 | static void forward_simple_utf8(TermInput *input, TermKeyKey *key) |
176 | { |
177 | size_t len = 0; |
178 | char buf[64]; |
179 | char *ptr = key->utf8; |
180 | |
181 | while (*ptr) { |
182 | if (*ptr == '<') { |
183 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "<lt>" ); |
184 | } else { |
185 | buf[len++] = *ptr; |
186 | } |
187 | ptr++; |
188 | } |
189 | |
190 | tinput_enqueue(input, buf, len); |
191 | } |
192 | |
193 | static void forward_modified_utf8(TermInput *input, TermKeyKey *key) |
194 | { |
195 | size_t len; |
196 | char buf[64]; |
197 | |
198 | if (key->type == TERMKEY_TYPE_KEYSYM |
199 | && key->code.sym == TERMKEY_SYM_ESCAPE) { |
200 | len = (size_t)snprintf(buf, sizeof(buf), "<Esc>" ); |
201 | } else if (key->type == TERMKEY_TYPE_KEYSYM |
202 | && key->code.sym == TERMKEY_SYM_SUSPEND) { |
203 | len = (size_t)snprintf(buf, sizeof(buf), "<C-Z>" ); |
204 | } else { |
205 | len = termkey_strfkey(input->tk, buf, sizeof(buf), key, TERMKEY_FORMAT_VIM); |
206 | } |
207 | |
208 | tinput_enqueue(input, buf, len); |
209 | } |
210 | |
211 | static void forward_mouse_event(TermInput *input, TermKeyKey *key) |
212 | { |
213 | char buf[64]; |
214 | size_t len = 0; |
215 | int button, row, col; |
216 | static int last_pressed_button = 0; |
217 | TermKeyMouseEvent ev; |
218 | termkey_interpret_mouse(input->tk, key, &ev, &button, &row, &col); |
219 | |
220 | if ((ev == TERMKEY_MOUSE_RELEASE || ev == TERMKEY_MOUSE_DRAG) |
221 | && button == 0) { |
222 | // Some terminals (like urxvt) don't report which button was released. |
223 | // libtermkey reports button 0 in this case. |
224 | // For drag and release, we can reasonably infer the button to be the last |
225 | // pressed one. |
226 | button = last_pressed_button; |
227 | } |
228 | |
229 | if (button == 0 || (ev != TERMKEY_MOUSE_PRESS && ev != TERMKEY_MOUSE_DRAG |
230 | && ev != TERMKEY_MOUSE_RELEASE)) { |
231 | return; |
232 | } |
233 | |
234 | row--; col--; // Termkey uses 1-based coordinates |
235 | buf[len++] = '<'; |
236 | |
237 | if (key->modifiers & TERMKEY_KEYMOD_SHIFT) { |
238 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "S-" ); |
239 | } |
240 | |
241 | if (key->modifiers & TERMKEY_KEYMOD_CTRL) { |
242 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "C-" ); |
243 | } |
244 | |
245 | if (key->modifiers & TERMKEY_KEYMOD_ALT) { |
246 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "A-" ); |
247 | } |
248 | |
249 | if (button == 1) { |
250 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "Left" ); |
251 | } else if (button == 2) { |
252 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "Middle" ); |
253 | } else if (button == 3) { |
254 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "Right" ); |
255 | } |
256 | |
257 | switch (ev) { |
258 | case TERMKEY_MOUSE_PRESS: |
259 | if (button == 4) { |
260 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "ScrollWheelUp" ); |
261 | } else if (button == 5) { |
262 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, |
263 | "ScrollWheelDown" ); |
264 | } else { |
265 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "Mouse" ); |
266 | last_pressed_button = button; |
267 | } |
268 | break; |
269 | case TERMKEY_MOUSE_DRAG: |
270 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "Drag" ); |
271 | break; |
272 | case TERMKEY_MOUSE_RELEASE: |
273 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "Release" ); |
274 | break; |
275 | case TERMKEY_MOUSE_UNKNOWN: |
276 | assert(false); |
277 | } |
278 | |
279 | len += (size_t)snprintf(buf + len, sizeof(buf) - len, "><%d,%d>" , col, row); |
280 | tinput_enqueue(input, buf, len); |
281 | } |
282 | |
283 | static TermKeyResult tk_getkey(TermKey *tk, TermKeyKey *key, bool force) |
284 | { |
285 | return force ? termkey_getkey_force(tk, key) : termkey_getkey(tk, key); |
286 | } |
287 | |
288 | static void tinput_timer_cb(TimeWatcher *watcher, void *data); |
289 | |
290 | static int get_key_code_timeout(void) |
291 | { |
292 | Integer ms = -1; |
293 | // Check 'ttimeout' to determine if we should send ESC after 'ttimeoutlen'. |
294 | Error err = ERROR_INIT; |
295 | if (nvim_get_option(cstr_as_string("ttimeout" ), &err).data.boolean) { |
296 | Object rv = nvim_get_option(cstr_as_string("ttimeoutlen" ), &err); |
297 | if (!ERROR_SET(&err)) { |
298 | ms = rv.data.integer; |
299 | } |
300 | } |
301 | api_clear_error(&err); |
302 | return (int)ms; |
303 | } |
304 | |
305 | static void tk_getkeys(TermInput *input, bool force) |
306 | { |
307 | TermKeyKey key; |
308 | TermKeyResult result; |
309 | |
310 | while ((result = tk_getkey(input->tk, &key, force)) == TERMKEY_RES_KEY) { |
311 | if (key.type == TERMKEY_TYPE_UNICODE && !key.modifiers) { |
312 | forward_simple_utf8(input, &key); |
313 | } else if (key.type == TERMKEY_TYPE_UNICODE |
314 | || key.type == TERMKEY_TYPE_FUNCTION |
315 | || key.type == TERMKEY_TYPE_KEYSYM) { |
316 | forward_modified_utf8(input, &key); |
317 | } else if (key.type == TERMKEY_TYPE_MOUSE) { |
318 | forward_mouse_event(input, &key); |
319 | } |
320 | } |
321 | |
322 | if (result != TERMKEY_RES_AGAIN) { |
323 | return; |
324 | } |
325 | // else: Partial keypress event was found in the buffer, but it does not |
326 | // yet contain all the bytes required. `key` structure indicates what |
327 | // termkey_getkey_force() would return. |
328 | |
329 | int ms = get_key_code_timeout(); |
330 | |
331 | if (ms > 0) { |
332 | // Stop the current timer if already running |
333 | time_watcher_stop(&input->timer_handle); |
334 | time_watcher_start(&input->timer_handle, tinput_timer_cb, (uint32_t)ms, 0); |
335 | } else { |
336 | tk_getkeys(input, true); |
337 | } |
338 | } |
339 | |
340 | static void tinput_timer_cb(TimeWatcher *watcher, void *data) |
341 | { |
342 | tk_getkeys(data, true); |
343 | tinput_flush(data, true); |
344 | } |
345 | |
346 | /// Handle focus events. |
347 | /// |
348 | /// If the upcoming sequence of bytes in the input stream matches the termcode |
349 | /// for "focus gained" or "focus lost", consume that sequence and schedule an |
350 | /// event on the main loop. |
351 | /// |
352 | /// @param input the input stream |
353 | /// @return true iff handle_focus_event consumed some input |
354 | static bool handle_focus_event(TermInput *input) |
355 | { |
356 | if (rbuffer_size(input->read_stream.buffer) > 2 |
357 | && (!rbuffer_cmp(input->read_stream.buffer, "\x1b[I" , 3) |
358 | || !rbuffer_cmp(input->read_stream.buffer, "\x1b[O" , 3))) { |
359 | bool focus_gained = *rbuffer_get(input->read_stream.buffer, 2) == 'I'; |
360 | // Advance past the sequence |
361 | rbuffer_consumed(input->read_stream.buffer, 3); |
362 | aucmd_schedule_focusgained(focus_gained); |
363 | return true; |
364 | } |
365 | return false; |
366 | } |
367 | |
368 | static bool handle_bracketed_paste(TermInput *input) |
369 | { |
370 | if (rbuffer_size(input->read_stream.buffer) > 5 |
371 | && (!rbuffer_cmp(input->read_stream.buffer, "\x1b[200~" , 6) |
372 | || !rbuffer_cmp(input->read_stream.buffer, "\x1b[201~" , 6))) { |
373 | bool enable = *rbuffer_get(input->read_stream.buffer, 4) == '0'; |
374 | if (input->paste && enable) { |
375 | return false; // Pasting "start paste" code literally. |
376 | } |
377 | // Advance past the sequence |
378 | rbuffer_consumed(input->read_stream.buffer, 6); |
379 | if (!!input->paste == enable) { |
380 | return true; // Spurious "disable paste" code. |
381 | } |
382 | |
383 | if (enable) { |
384 | // Flush before starting paste. |
385 | tinput_flush(input, true); |
386 | // Paste phase: "first-chunk". |
387 | input->paste = 1; |
388 | } else if (input->paste) { |
389 | // Paste phase: "last-chunk". |
390 | input->paste = input->paste == 2 ? 3 : -1; |
391 | tinput_flush(input, true); |
392 | // Paste phase: "disabled". |
393 | input->paste = 0; |
394 | } |
395 | return true; |
396 | } |
397 | return false; |
398 | } |
399 | |
400 | // ESC NUL => <Esc> |
401 | static bool handle_forced_escape(TermInput *input) |
402 | { |
403 | if (rbuffer_size(input->read_stream.buffer) > 1 |
404 | && !rbuffer_cmp(input->read_stream.buffer, "\x1b\x00" , 2)) { |
405 | // skip the ESC and NUL and push one <esc> to the input buffer |
406 | size_t rcnt; |
407 | termkey_push_bytes(input->tk, rbuffer_read_ptr(input->read_stream.buffer, |
408 | &rcnt), 1); |
409 | rbuffer_consumed(input->read_stream.buffer, 2); |
410 | tk_getkeys(input, true); |
411 | return true; |
412 | } |
413 | return false; |
414 | } |
415 | |
416 | static void set_bg_deferred(void **argv) |
417 | { |
418 | char *bgvalue = argv[0]; |
419 | if (!option_was_set("bg" ) && !strequal((char *)p_bg, bgvalue)) { |
420 | // Value differs, apply it. |
421 | if (starting) { |
422 | // Wait until after startup, so OptionSet is triggered. |
423 | do_cmdline_cmd((bgvalue[0] == 'l') |
424 | ? "autocmd VimEnter * ++once ++nested set bg=light" |
425 | : "autocmd VimEnter * ++once ++nested set bg=dark" ); |
426 | } else { |
427 | set_option_value("bg" , 0L, bgvalue, 0); |
428 | reset_option_was_set("bg" ); |
429 | } |
430 | } |
431 | } |
432 | |
433 | // During startup, tui.c requests the background color (see `ext.get_bg`). |
434 | // |
435 | // Here in input.c, we watch for the terminal response `\e]11;COLOR\a`. If |
436 | // COLOR matches `rgb:RRRR/GGGG/BBBB/AAAA` where R, G, B, and A are hex digits, |
437 | // then compute the luminance[1] of the RGB color and classify it as light/dark |
438 | // accordingly. Note that the color components may have anywhere from one to |
439 | // four hex digits, and require scaling accordingly as values out of 4, 8, 12, |
440 | // or 16 bits. Also note the A(lpha) component is optional, and is parsed but |
441 | // ignored in the calculations. |
442 | // |
443 | // [1] https://en.wikipedia.org/wiki/Luma_%28video%29 |
444 | static bool handle_background_color(TermInput *input) |
445 | { |
446 | size_t count = 0; |
447 | size_t component = 0; |
448 | size_t = 0; |
449 | size_t num_components = 0; |
450 | uint16_t rgb[] = { 0, 0, 0 }; |
451 | uint16_t rgb_max[] = { 0, 0, 0 }; |
452 | bool eat_backslash = false; |
453 | bool done = false; |
454 | bool bad = false; |
455 | if (rbuffer_size(input->read_stream.buffer) >= 9 |
456 | && !rbuffer_cmp(input->read_stream.buffer, "\x1b]11;rgb:" , 9)) { |
457 | header_size = 9; |
458 | num_components = 3; |
459 | } else if (rbuffer_size(input->read_stream.buffer) >= 10 |
460 | && !rbuffer_cmp(input->read_stream.buffer, "\x1b]11;rgba:" , 10)) { |
461 | header_size = 10; |
462 | num_components = 4; |
463 | } else { |
464 | return false; |
465 | } |
466 | rbuffer_consumed(input->read_stream.buffer, header_size); |
467 | RBUFFER_EACH(input->read_stream.buffer, c, i) { |
468 | count = i + 1; |
469 | if (eat_backslash) { |
470 | done = true; |
471 | break; |
472 | } else if (c == '\x07') { |
473 | done = true; |
474 | break; |
475 | } else if (c == '\x1b') { |
476 | eat_backslash = true; |
477 | } else if (bad) { |
478 | // ignore |
479 | } else if ((c == '/') && (++component < num_components)) { |
480 | // work done in condition |
481 | } else if (ascii_isxdigit(c)) { |
482 | if (component < 3 && rgb_max[component] != 0xffff) { |
483 | rgb_max[component] = (uint16_t)((rgb_max[component] << 4) | 0xf); |
484 | rgb[component] = (uint16_t)((rgb[component] << 4) | hex2nr(c)); |
485 | } |
486 | } else { |
487 | bad = true; |
488 | } |
489 | } |
490 | rbuffer_consumed(input->read_stream.buffer, count); |
491 | if (done && !bad && rgb_max[0] && rgb_max[1] && rgb_max[2]) { |
492 | double r = (double)rgb[0] / (double)rgb_max[0]; |
493 | double g = (double)rgb[1] / (double)rgb_max[1]; |
494 | double b = (double)rgb[2] / (double)rgb_max[2]; |
495 | double luminance = (0.299 * r) + (0.587 * g) + (0.114 * b); // CCIR 601 |
496 | char *bgvalue = luminance < 0.5 ? "dark" : "light" ; |
497 | DLOG("bg response: %s" , bgvalue); |
498 | loop_schedule_deferred(&main_loop, |
499 | event_create(set_bg_deferred, 1, bgvalue)); |
500 | } else { |
501 | DLOG("failed to parse bg response" ); |
502 | return false; |
503 | } |
504 | return true; |
505 | } |
506 | |
507 | static void tinput_read_cb(Stream *stream, RBuffer *buf, size_t count_, |
508 | void *data, bool eof) |
509 | { |
510 | TermInput *input = data; |
511 | |
512 | if (eof) { |
513 | loop_schedule_fast(&main_loop, event_create(tinput_done_event, 0)); |
514 | return; |
515 | } |
516 | |
517 | do { |
518 | if (handle_focus_event(input) |
519 | || handle_bracketed_paste(input) |
520 | || handle_forced_escape(input) |
521 | || handle_background_color(input)) { |
522 | continue; |
523 | } |
524 | |
525 | // |
526 | // Find the next ESC and push everything up to it (excluding), so it will |
527 | // be the first thing encountered on the next iteration. The `handle_*` |
528 | // calls (above) depend on this. |
529 | // |
530 | size_t count = 0; |
531 | RBUFFER_EACH(input->read_stream.buffer, c, i) { |
532 | count = i + 1; |
533 | if (c == '\x1b' && count > 1) { |
534 | count--; |
535 | break; |
536 | } |
537 | } |
538 | // Push bytes directly (paste). |
539 | if (input->paste) { |
540 | RBUFFER_UNTIL_EMPTY(input->read_stream.buffer, ptr, len) { |
541 | size_t consumed = MIN(count, len); |
542 | assert(consumed <= input->read_stream.buffer->size); |
543 | tinput_enqueue(input, ptr, consumed); |
544 | rbuffer_consumed(input->read_stream.buffer, consumed); |
545 | if (!(count -= consumed)) { |
546 | break; |
547 | } |
548 | } |
549 | continue; |
550 | } |
551 | // Push through libtermkey (translates to "<keycode>" strings, etc.). |
552 | RBUFFER_UNTIL_EMPTY(input->read_stream.buffer, ptr, len) { |
553 | size_t consumed = termkey_push_bytes(input->tk, ptr, MIN(count, len)); |
554 | // termkey_push_bytes can return (size_t)-1, so it is possible that |
555 | // `consumed > input->read_stream.buffer->size`, but since tk_getkeys is |
556 | // called soon, it shouldn't happen. |
557 | assert(consumed <= input->read_stream.buffer->size); |
558 | rbuffer_consumed(input->read_stream.buffer, consumed); |
559 | // Process the keys now: there is no guarantee `count` will |
560 | // fit into libtermkey's input buffer. |
561 | tk_getkeys(input, false); |
562 | if (!(count -= consumed)) { |
563 | break; |
564 | } |
565 | } |
566 | } while (rbuffer_size(input->read_stream.buffer)); |
567 | tinput_flush(input, true); |
568 | // Make sure the next input escape sequence fits into the ring buffer without |
569 | // wraparound, else it could be misinterpreted (because rbuffer_read_ptr() |
570 | // exposes the underlying buffer to callers unaware of the wraparound). |
571 | rbuffer_reset(input->read_stream.buffer); |
572 | } |
573 | |