addbytes.c revision 1.67
1 /* $NetBSD: addbytes.c,v 1.67 2022/12/12 21:14:15 blymn Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)addbytes.c 8.4 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: addbytes.c,v 1.67 2022/12/12 21:14:15 blymn Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 #include <string.h> 43 #include "curses.h" 44 #include "curses_private.h" 45 #ifdef DEBUG 46 #include <assert.h> 47 #endif 48 49 #ifndef _CURSES_USE_MACROS 50 51 /* 52 * addbytes -- 53 * Add the characters to the current position in stdscr. 54 */ 55 int 56 addbytes(const char *bytes, int count) 57 { 58 59 return _cursesi_waddbytes(stdscr, bytes, count, 0, 1); 60 } 61 62 /* 63 * waddbytes -- 64 * Add the characters to the current position in the given window. 65 */ 66 int 67 waddbytes(WINDOW *win, const char *bytes, int count) 68 { 69 70 return _cursesi_waddbytes(win, bytes, count, 0, 1); 71 } 72 73 /* 74 * mvaddbytes -- 75 * Add the characters to stdscr at the location given. 76 */ 77 int 78 mvaddbytes(int y, int x, const char *bytes, int count) 79 { 80 81 return mvwaddbytes(stdscr, y, x, bytes, count); 82 } 83 84 /* 85 * mvwaddbytes -- 86 * Add the characters to the given window at the location given. 87 */ 88 int 89 mvwaddbytes(WINDOW *win, int y, int x, const char *bytes, int count) 90 { 91 92 if (wmove(win, y, x) == ERR) 93 return ERR; 94 95 return _cursesi_waddbytes(win, bytes, count, 0, 1); 96 } 97 98 #endif 99 100 int 101 __waddbytes(WINDOW *win, const char *bytes, int count, attr_t attr) 102 { 103 104 return _cursesi_waddbytes(win, bytes, count, attr, 1); 105 } 106 107 /* 108 * _cursesi_waddbytes -- 109 * Add the characters to the current position in the given window. 110 * if char_interp is non-zero then character interpretation is done on 111 * the byte (i.e. \n to newline, \r to carriage return, \b to backspace 112 * and so on). 113 */ 114 int 115 _cursesi_waddbytes(WINDOW *win, const char *bytes, int count, attr_t attr, 116 int char_interp) 117 { 118 int *py = &win->cury, *px = &win->curx, err; 119 __LINE *lp; 120 #ifdef HAVE_WCHAR 121 int n, width; 122 cchar_t cc; 123 wchar_t wc; 124 mbstate_t st; 125 #else 126 int c; 127 #endif 128 #ifdef DEBUG 129 int i; 130 131 for (i = 0; i < win->maxy; i++) { 132 assert(win->alines[i]->sentinel == SENTINEL_VALUE); 133 } 134 135 __CTRACE(__CTRACE_INPUT, "ADDBYTES: add %d bytes\n", count); 136 #endif 137 138 err = OK; 139 lp = win->alines[*py]; 140 141 #ifdef HAVE_WCHAR 142 (void)memset(&st, 0, sizeof(st)); 143 #endif 144 while (count > 0) { 145 #ifndef HAVE_WCHAR 146 c = *bytes++; 147 __CTRACE(__CTRACE_INPUT, "ADDBYTES('%c', %x) at (%d, %d)\n", 148 c, attr, *py, *px); 149 err = _cursesi_addbyte(win, &lp, py, px, c, attr, char_interp); 150 count--; 151 #else 152 /* 153 * For wide-character support only, try to convert the 154 * given string into a wide character - we do this because 155 * this is how ncurses behaves (not that I think this is 156 * actually the correct thing to do but if we don't do it 157 * a lot of things that rely on this behaviour will break 158 * and we will be blamed). If the conversion succeeds 159 * then we eat the n characters used to make the wide char 160 * from the string. 161 */ 162 n = (int)mbrtowc(&wc, bytes, (size_t)count, &st); 163 if (n < 0) { 164 /* not a valid conversion just eat a char */ 165 wc = *bytes; 166 n = 1; 167 (void)memset(&st, 0, sizeof(st)); 168 } else if (wc == 0) { 169 break; 170 } 171 172 __CTRACE(__CTRACE_INPUT, 173 "ADDBYTES WIDE(0x%x [%s], %x) at (%d, %d), ate %d bytes\n", 174 (unsigned)wc, unctrl((unsigned)wc), attr, *py, *px, n); 175 cc.vals[0] = wc; 176 cc.elements = 1; 177 cc.attributes = attr; 178 err = _cursesi_addwchar(win, &lp, py, px, &cc, char_interp); 179 bytes += n; 180 181 width = wcwidth(wc); 182 if (width < 0) 183 width = 1; 184 count -= width; 185 #endif 186 } 187 188 #ifdef DEBUG 189 for (i = 0; i < win->maxy; i++) { 190 assert(win->alines[i]->sentinel == SENTINEL_VALUE); 191 } 192 #endif 193 194 return (err); 195 } 196 197 /* 198 * _cursesi_addbyte - 199 * Internal function to add a byte and update the row and column 200 * positions as appropriate. If char_interp is non-zero then 201 * character interpretation is done on the byte. This function is 202 * only used in the narrow character version of curses. 203 */ 204 int 205 _cursesi_addbyte(WINDOW *win, __LINE **lp, int *y, int *x, int c, 206 attr_t attr, int char_interp) 207 { 208 static char blank[] = " "; 209 int tabsize; 210 int newx, i, wcols; 211 attr_t attributes; 212 213 if (char_interp) { 214 switch (c) { 215 case '\t': 216 tabsize = win->screen->TABSIZE; 217 newx = tabsize - (*x % tabsize); 218 /* if at the bottom of the window and 219 not allowed to scroll then just do 220 what we can */ 221 if ((*y == win->scr_b) && 222 !(win->flags & __SCROLLOK)) { 223 if ((*lp)->flags & __ISPASTEOL) { 224 return OK; 225 } 226 227 if (*x + newx > win->maxx - 1) 228 newx = win->maxx - *x - 1; 229 } 230 231 for (i = 0; i < newx; i++) { 232 if (waddbytes(win, blank, 1) == ERR) 233 return ERR; 234 } 235 return OK; 236 237 case '\n': 238 wclrtoeol(win); 239 (*lp)->flags |= __ISPASTEOL; 240 break; 241 242 case '\r': 243 *x = 0; 244 return OK; 245 246 case '\b': 247 if (--(*x) < 0) 248 *x = 0; 249 return OK; 250 } 251 } 252 253 __CTRACE(__CTRACE_INPUT, "ADDBYTES(%p, %d, %d)\n", win, *y, *x); 254 255 if (char_interp && ((*lp)->flags & __ISPASTEOL)) { 256 *x = 0; 257 (*lp)->flags &= ~__ISPASTEOL; 258 if (*y == win->scr_b) { 259 __CTRACE(__CTRACE_INPUT, 260 "ADDBYTES - on bottom of scrolling region\n"); 261 if (!(win->flags & __SCROLLOK)) 262 return ERR; 263 scroll(win); 264 } else { 265 (*y)++; 266 } 267 *lp = win->alines[*y]; 268 if (c == '\n') 269 return OK; 270 } 271 272 __CTRACE(__CTRACE_INPUT, 273 "ADDBYTES: 1: y = %d, x = %d, firstch = %d, lastch = %d\n", 274 *y, *x, *win->alines[*y]->firstchp, *win->alines[*y]->lastchp); 275 276 attributes = (win->wattr | attr) & (__ATTRIBUTES & ~__COLOR); 277 if (attr & __COLOR) 278 attributes |= attr & __COLOR; 279 else if (win->wattr & __COLOR) 280 attributes |= win->wattr & __COLOR; 281 282 283 wcols = wcwidth(c); 284 if (wcols < 0) 285 wcols = 1; 286 287 /* 288 * Always update the change pointers. Otherwise, 289 * we could end up not displaying 'blank' characters 290 * when overlapping windows are displayed. 291 */ 292 newx = *x + win->ch_off; 293 (*lp)->flags |= __ISDIRTY; 294 /* 295 * firstchp/lastchp are shared between 296 * parent window and sub-window. 297 */ 298 if (newx < *(*lp)->firstchp) 299 *(*lp)->firstchp = newx; 300 301 if (newx > *(*lp)->lastchp) 302 *(*lp)->lastchp = newx; 303 __CTRACE(__CTRACE_INPUT, "ADDBYTES: change gives f/l: %d/%d [%d/%d]\n", 304 *(*lp)->firstchp, *(*lp)->lastchp, 305 *(*lp)->firstchp - win->ch_off, 306 *(*lp)->lastchp - win->ch_off); 307 if (win->bch != ' ' && c == ' ') { 308 (*lp)->line[*x].ch = win->bch; 309 #ifdef HAVE_CHAR 310 (*lp)->line[*x].wcols = win->wcols; 311 #endif 312 } else { 313 (*lp)->line[*x].ch = c; 314 #ifdef HAVE_CHAR 315 (*lp)->line[*x].wcols = wcols; 316 #endif 317 } 318 319 (*lp)->line[*x].cflags &= ~ (CA_BACKGROUND | CA_CONTINUATION); 320 321 if (attributes & __COLOR) 322 (*lp)->line[*x].attr = 323 attributes | (win->battr & ~__COLOR); 324 else 325 (*lp)->line[*x].attr = attributes | win->battr; 326 327 if (*x == win->maxx - 1) 328 (*lp)->flags |= __ISPASTEOL; 329 else 330 (*x)++; 331 332 __CTRACE(__CTRACE_INPUT, 333 "ADDBYTES: 2: y = %d, x = %d, firstch = %d, lastch = %d\n", 334 *y, *x, *win->alines[*y]->firstchp, *win->alines[*y]->lastchp); 335 __sync(win); 336 return OK; 337 } 338 339 /* 340 * _cursesi_addwchar - 341 * Internal function to add a wide character and update the row 342 * and column positions. 343 */ 344 int 345 _cursesi_addwchar(WINDOW *win, __LINE **lnp, int *y, int *x, 346 const cchar_t *wch, int char_interp) 347 { 348 #ifndef HAVE_WCHAR 349 return ERR; 350 #else 351 int sx = 0, ex = 0, cw = 0, i = 0, newx = 0, tabsize; 352 __LDATA *lp = &win->alines[*y]->line[*x], *tp = NULL; 353 nschar_t *np = NULL; 354 cchar_t cc; 355 attr_t attributes; 356 357 if (char_interp) { 358 /* special characters handling */ 359 switch (wch->vals[0]) { 360 case L'\b': 361 if (--*x < 0) 362 *x = 0; 363 return OK; 364 case L'\r': 365 *x = 0; 366 return OK; 367 case L'\n': 368 if (*y == win->scr_b) { 369 if (!(win->flags & __SCROLLOK)) 370 return ERR; 371 wclrtoeol(win); 372 scroll(win); 373 } else { 374 wclrtoeol(win); 375 (*y)++; 376 } 377 *x = 0; 378 (*lnp)->flags &= ~__ISPASTEOL; 379 return OK; 380 case L'\t': 381 cc.vals[0] = L' '; 382 cc.elements = 1; 383 cc.attributes = win->wattr; 384 tabsize = win->screen->TABSIZE; 385 newx = tabsize - (*x % tabsize); 386 387 /* if at the bottom of the window and 388 not allowed to scroll then just do 389 what we can */ 390 if ((*y == win->scr_b) && 391 !(win->flags & __SCROLLOK)) { 392 if ((*lnp)->flags & __ISPASTEOL) { 393 return ERR; 394 } 395 396 if (*x + newx > win->maxx - 1) 397 newx = win->maxx - *x - 1; 398 } 399 400 for (i = 0; i < newx; i++) { 401 if (wadd_wch(win, &cc) == ERR) 402 return ERR; 403 } 404 return OK; 405 } 406 } 407 408 /* check for non-spacing character */ 409 if (!wcwidth(wch->vals[0])) { 410 __CTRACE(__CTRACE_INPUT, 411 "_cursesi_addwchar: char '%c' is non-spacing\n", 412 wch->vals[0]); 413 cw = (*lp).wcols; 414 if (cw < 0) { 415 lp += cw; 416 *x += cw; 417 } 418 for (i = 0; i < wch->elements; i++) { 419 if (!(np = (nschar_t *) malloc(sizeof(nschar_t)))) 420 return ERR; 421 np->ch = wch->vals[i]; 422 np->next = lp->nsp; 423 lp->nsp = np; 424 } 425 (*lnp)->flags |= __ISDIRTY; 426 newx = *x + win->ch_off; 427 if (newx < *(*lnp)->firstchp) 428 *(*lnp)->firstchp = newx; 429 430 if (newx > *(*lnp)->lastchp) 431 *(*lnp)->lastchp = newx; 432 __touchline(win, *y, *x, *x); 433 return OK; 434 } 435 /* check for new line first */ 436 if (char_interp && ((*lnp)->flags & __ISPASTEOL)) { 437 *x = 0; 438 (*lnp)->flags &= ~__ISPASTEOL; 439 if (*y == win->scr_b) { 440 if (!(win->flags & __SCROLLOK)) 441 return ERR; 442 scroll(win); 443 } else { 444 (*y)++; 445 } 446 (*lnp) = win->alines[*y]; 447 lp = &win->alines[*y]->line[*x]; 448 } 449 /* clear out the current character */ 450 cw = (*lp).wcols; 451 if (cw >= 0) { 452 sx = *x; 453 } else { 454 for (sx = *x - 1; sx >= max(*x + cw, 0); sx--) { 455 __CTRACE(__CTRACE_INPUT, 456 "_cursesi_addwchar: clear current char (%d,%d)\n", 457 *y, sx); 458 tp = &win->alines[*y]->line[sx]; 459 tp->ch = win->bch; 460 tp->cflags = CA_BACKGROUND; 461 if (_cursesi_copy_nsp(win->bnsp, tp) == ERR) 462 return ERR; 463 464 tp->attr = win->battr; 465 tp->wcols = win->wcols; 466 } 467 sx = *x + cw; 468 (*lnp)->flags |= __ISDIRTY; 469 newx = sx + win->ch_off; 470 if (newx < *(*lnp)->firstchp) 471 *(*lnp)->firstchp = newx; 472 } 473 474 /* check for enough space before the end of line */ 475 cw = wcwidth(wch->vals[0]); 476 if (cw < 0) 477 cw = 1; 478 479 if (cw > win->maxx - *x) { 480 __CTRACE(__CTRACE_INPUT, 481 "_cursesi_addwchar: clear EOL (%d,%d)\n", *y, *x); 482 if (*y == win->scr_b) { 483 if (!(win->flags & __SCROLLOK)) 484 return ERR; 485 scroll(win); 486 } 487 488 (*lnp)->flags |= __ISDIRTY; 489 newx = *x + win->ch_off; 490 if (newx < *(*lnp)->firstchp) 491 *(*lnp)->firstchp = newx; 492 493 for (tp = lp; *x < win->maxx; tp++, (*x)++) { 494 tp->ch = win->bch; 495 if (_cursesi_copy_nsp(win->bnsp, tp) == ERR) 496 return ERR; 497 tp->attr = win->battr; 498 tp->wcols = win->wcols; 499 tp->cflags = CA_BACKGROUND; 500 } 501 newx = win->maxx - 1 + win->ch_off; 502 if (newx > *(*lnp)->lastchp) 503 *(*lnp)->lastchp = newx; 504 __touchline(win, *y, sx, (int) win->maxx - 1); 505 sx = *x = 0; 506 if (*y != win->scr_b) { 507 (*y)++; 508 } 509 lp = &win->alines[*y]->line[0]; 510 (*lnp) = win->alines[*y]; 511 } 512 513 /* add spacing character */ 514 __CTRACE(__CTRACE_INPUT, 515 "_cursesi_addwchar: add character (%d,%d) 0x%x\n", 516 *y, *x, wch->vals[0]); 517 (*lnp)->flags |= __ISDIRTY; 518 newx = *x + win->ch_off; 519 if (newx < *(*lnp)->firstchp) 520 *(*lnp)->firstchp = newx; 521 522 if (lp->nsp) { 523 __cursesi_free_nsp(lp->nsp); 524 lp->nsp = NULL; 525 } 526 527 lp->ch = wch->vals[0]; 528 lp->cflags &= ~ (CA_BACKGROUND | CA_CONTINUATION); 529 530 attributes = (win->wattr | wch->attributes) 531 & (WA_ATTRIBUTES & ~__COLOR); 532 if (wch->attributes & __COLOR) 533 attributes |= wch->attributes & __COLOR; 534 else if (win->wattr & __COLOR) 535 attributes |= win->wattr & __COLOR; 536 if (attributes & __COLOR) 537 lp->attr = attributes | (win->battr & ~__COLOR); 538 else 539 lp->attr = attributes | win->battr; 540 541 lp->wcols = cw; 542 543 __CTRACE(__CTRACE_INPUT, 544 "_cursesi_addwchar: add spacing char 0x%x, attr 0x%x, width %d\n", 545 lp->ch, lp->attr, lp->wcols); 546 547 if (wch->elements > 1) { 548 for (i = 1; i < wch->elements; i++) { 549 np = malloc(sizeof(nschar_t)); 550 if (!np) 551 return ERR; 552 np->ch = wch->vals[i]; 553 np->next = lp->nsp; 554 __CTRACE(__CTRACE_INPUT, 555 "_cursesi_addwchar: add non-spacing char 0x%x\n", 556 np->ch); 557 lp->nsp = np; 558 } 559 } 560 __CTRACE(__CTRACE_INPUT, 561 "_cursesi_addwchar: non-spacing list header: %p\n", lp->nsp); 562 __CTRACE(__CTRACE_INPUT, 563 "_cursesi_addwchar: add rest columns (%d:%d)\n", 564 sx + 1, sx + cw - 1); 565 __CTRACE(__CTRACE_INPUT, "_cursesi_addwchar: *x = %d, win->maxx = %d\n", 566 *x, win->maxx); 567 for (tp = lp + 1, *x = sx + 1, i = cw - 1; i > 0; tp++, (*x)++, i--) { 568 __CTRACE(__CTRACE_INPUT, 569 "_cursesi_addwchar: setting continuation at x %d\n", *x); 570 if (tp->nsp) { 571 __cursesi_free_nsp(tp->nsp); 572 tp->nsp = NULL; 573 } 574 tp->ch = wch->vals[0]; 575 tp->attr = lp->attr & WA_ATTRIBUTES; 576 /* Mark as "continuation" cell */ 577 tp->cflags |= CA_CONTINUATION; 578 tp->cflags &= ~ CA_BACKGROUND; 579 tp->wcols = i; 580 } 581 582 if (*x >= win->maxx) { 583 __CTRACE(__CTRACE_INPUT, "_cursesi_addwchar: do line wrap\n"); 584 if (*y == win->scr_b) { 585 __CTRACE(__CTRACE_INPUT, 586 "_cursesi_addwchar: at bottom of screen\n"); 587 if (!(win->flags & __SCROLLOK)) 588 return ERR; 589 __CTRACE(__CTRACE_INPUT, 590 "_cursesi_addwchar: do a scroll\n"); 591 scroll(win); 592 } 593 newx = win->maxx - 1 + win->ch_off; 594 if (newx > *(*lnp)->lastchp) 595 *(*lnp)->lastchp = newx; 596 __touchline(win, *y, sx, (int) win->maxx - 1); 597 *x = sx = 0; 598 if (*y != win->scr_b) { 599 (*y)++; 600 } 601 lp = &win->alines[*y]->line[0]; 602 (*lnp) = win->alines[*y]; 603 *(*lnp)->lastchp = win->ch_off + win->maxx - 1; 604 } else { 605 /* clear the remaining of the current character */ 606 if (*x && *x < win->maxx) { 607 ex = sx + cw; 608 tp = &win->alines[*y]->line[ex]; 609 while (ex < win->maxx && tp->wcols < 0) { 610 __CTRACE(__CTRACE_INPUT, 611 "_cursesi_addwchar: clear " 612 "remaining of current char (%d,%d)nn", 613 *y, ex); 614 tp->ch = win->bch; 615 tp->cflags = CA_BACKGROUND; 616 if (_cursesi_copy_nsp(win->bnsp, tp) == ERR) 617 return ERR; 618 tp->attr = win->battr; 619 tp->wcols = win->wcols; 620 tp++, ex++; 621 } 622 newx = ex - 1 + win->ch_off; 623 if (newx > *(*lnp)->lastchp) 624 *(*lnp)->lastchp = newx; 625 __touchline(win, *y, sx, ex - 1); 626 } 627 } 628 629 __CTRACE(__CTRACE_INPUT, "_cursesi_addwchar: %d : 0x%x\n", 630 lp->ch, lp->attr); 631 __CTRACE(__CTRACE_INPUT, 632 "_cursesi_addwchar: *x = %d, *y = %d, win->maxx = %d\n", 633 *x, *y, win->maxx); 634 __sync(win); 635 return OK; 636 #endif 637 } 638
Indexes created Thu Sep 25 06:09:39 GMT 2025