1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * Copyright (c) 2011 The FreeBSD Foundation 11 * All rights reserved. 12 * Portions of this software were developed by David Chisnall 13 * under sponsorship from the FreeBSD Foundation. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #if 0 41 #if defined(LIBC_SCCS) && !defined(lint) 42 static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93"; 43 #endif /* LIBC_SCCS and not lint */ 44 #endif 45 #include <sys/cdefs.h> 46 __FBSDID("$FreeBSD$"); 47 48 /* 49 * Actual wprintf innards. 50 * 51 * Avoid making gratuitous changes to this source file; it should be kept 52 * as close as possible to vfprintf.c for ease of maintenance. 53 */ 54 55 #include "namespace.h" 56 #include <sys/types.h> 57 58 #include <ctype.h> 59 #include <errno.h> 60 #include <limits.h> 61 #include <locale.h> 62 #include <stdarg.h> 63 #include <stddef.h> 64 #include <stdint.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <wchar.h> 69 #include <wctype.h> 70 #include "un-namespace.h" 71 72 #include "libc_private.h" 73 #include "local.h" 74 #include "fvwrite.h" 75 #include "printflocal.h" 76 #include "xlocale_private.h" 77 78 static int __sprint(FILE *, struct __suio *, locale_t); 79 static int __sbprintf(FILE *, locale_t, const wchar_t *, va_list) __noinline; 80 static wint_t __xfputwc(wchar_t, FILE *, locale_t); 81 static wchar_t *__mbsconv(char *, int); 82 83 #define CHAR wchar_t 84 #include "printfcommon.h" 85 86 struct grouping_state { 87 wchar_t thousands_sep; /* locale-specific thousands separator */ 88 const char *grouping; /* locale-specific numeric grouping rules */ 89 int lead; /* sig figs before decimal or group sep */ 90 int nseps; /* number of group separators with ' */ 91 int nrepeats; /* number of repeats of the last group */ 92 }; 93 94 static const mbstate_t initial_mbs; 95 96 static inline wchar_t 97 get_decpt(locale_t locale) 98 { 99 mbstate_t mbs; 100 wchar_t decpt; 101 int nconv; 102 103 mbs = initial_mbs; 104 nconv = mbrtowc(&decpt, localeconv_l(locale)->decimal_point, MB_CUR_MAX, &mbs); 105 if (nconv == (size_t)-1 || nconv == (size_t)-2) 106 decpt = '.'; /* failsafe */ 107 return (decpt); 108 } 109 110 static inline wchar_t 111 get_thousep(locale_t locale) 112 { 113 mbstate_t mbs; 114 wchar_t thousep; 115 int nconv; 116 117 mbs = initial_mbs; 118 nconv = mbrtowc(&thousep, localeconv_l(locale)->thousands_sep, 119 MB_CUR_MAX, &mbs); 120 if (nconv == (size_t)-1 || nconv == (size_t)-2) 121 thousep = '\0'; /* failsafe */ 122 return (thousep); 123 } 124 125 /* 126 * Initialize the thousands' grouping state in preparation to print a 127 * number with ndigits digits. This routine returns the total number 128 * of wide characters that will be printed. 129 */ 130 static int 131 grouping_init(struct grouping_state *gs, int ndigits, locale_t locale) 132 { 133 134 gs->grouping = localeconv_l(locale)->grouping; 135 gs->thousands_sep = get_thousep(locale); 136 137 gs->nseps = gs->nrepeats = 0; 138 gs->lead = ndigits; 139 while (*gs->grouping != CHAR_MAX) { 140 if (gs->lead <= *gs->grouping) 141 break; 142 gs->lead -= *gs->grouping; 143 if (*(gs->grouping+1)) { 144 gs->nseps++; 145 gs->grouping++; 146 } else 147 gs->nrepeats++; 148 } 149 return (gs->nseps + gs->nrepeats); 150 } 151 152 /* 153 * Print a number with thousands' separators. 154 */ 155 static int 156 grouping_print(struct grouping_state *gs, struct io_state *iop, 157 const CHAR *cp, const CHAR *ep, locale_t locale) 158 { 159 const CHAR *cp0 = cp; 160 161 if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale)) 162 return (-1); 163 cp += gs->lead; 164 while (gs->nseps > 0 || gs->nrepeats > 0) { 165 if (gs->nrepeats > 0) 166 gs->nrepeats--; 167 else { 168 gs->grouping--; 169 gs->nseps--; 170 } 171 if (io_print(iop, &gs->thousands_sep, 1, locale)) 172 return (-1); 173 if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale)) 174 return (-1); 175 cp += *gs->grouping; 176 } 177 if (cp > ep) 178 cp = ep; 179 return (cp - cp0); 180 } 181 182 183 /* 184 * Flush out all the vectors defined by the given uio, 185 * then reset it so that it can be reused. 186 * 187 * XXX The fact that we do this a character at a time and convert to a 188 * multibyte character sequence even if the destination is a wide 189 * string eclipses the benefits of buffering. 190 */ 191 static int 192 __sprint(FILE *fp, struct __suio *uio, locale_t locale) 193 { 194 struct __siov *iov; 195 wchar_t *p; 196 int i, len; 197 198 iov = uio->uio_iov; 199 for (; uio->uio_resid != 0; uio->uio_resid -= len, iov++) { 200 p = (wchar_t *)iov->iov_base; 201 len = iov->iov_len; 202 for (i = 0; i < len; i++) { 203 if (__xfputwc(p[i], fp, locale) == WEOF) 204 return (-1); 205 } 206 } 207 uio->uio_iovcnt = 0; 208 return (0); 209 } 210 211 /* 212 * Helper function for `fprintf to unbuffered unix file': creates a 213 * temporary buffer. We only work on write-only files; this avoids 214 * worries about ungetc buffers and so forth. 215 */ 216 static int 217 __sbprintf(FILE *fp, locale_t locale, const wchar_t *fmt, va_list ap) 218 { 219 int ret; 220 FILE fake; 221 unsigned char buf[BUFSIZ]; 222 223 /* XXX This is probably not needed. */ 224 if (prepwrite(fp) != 0) 225 return (EOF); 226 227 /* copy the important variables */ 228 fake._flags = fp->_flags & ~__SNBF; 229 fake._file = fp->_file; 230 fake._cookie = fp->_cookie; 231 fake._write = fp->_write; 232 fake._orientation = fp->_orientation; 233 fake._mbstate = fp->_mbstate; 234 235 /* set up the buffer */ 236 fake._bf._base = fake._p = buf; 237 fake._bf._size = fake._w = sizeof(buf); 238 fake._lbfsize = 0; /* not actually used, but Just In Case */ 239 240 /* do the work, then copy any error status */ 241 ret = __vfwprintf(&fake, locale, fmt, ap); 242 if (ret >= 0 && __fflush(&fake)) 243 ret = WEOF; 244 if (fake._flags & __SERR) 245 fp->_flags |= __SERR; 246 return (ret); 247 } 248 249 /* 250 * Like __fputwc, but handles fake string (__SSTR) files properly. 251 * File must already be locked. 252 */ 253 static wint_t 254 __xfputwc(wchar_t wc, FILE *fp, locale_t locale) 255 { 256 mbstate_t mbs; 257 char buf[MB_LEN_MAX]; 258 struct __suio uio; 259 struct __siov iov; 260 size_t len; 261 262 if ((fp->_flags & __SSTR) == 0) 263 return (__fputwc(wc, fp, locale)); 264 265 mbs = initial_mbs; 266 if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) { 267 fp->_flags |= __SERR; 268 return (WEOF); 269 } 270 uio.uio_iov = &iov; 271 uio.uio_resid = len; 272 uio.uio_iovcnt = 1; 273 iov.iov_base = buf; 274 iov.iov_len = len; 275 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF); 276 } 277 278 /* 279 * Convert a multibyte character string argument for the %s format to a wide 280 * string representation. ``prec'' specifies the maximum number of bytes 281 * to output. If ``prec'' is greater than or equal to zero, we can't assume 282 * that the multibyte char. string ends in a null character. 283 */ 284 static wchar_t * 285 __mbsconv(char *mbsarg, int prec) 286 { 287 mbstate_t mbs; 288 wchar_t *convbuf, *wcp; 289 const char *p; 290 size_t insize, nchars, nconv; 291 292 if (mbsarg == NULL) 293 return (NULL); 294 295 /* 296 * Supplied argument is a multibyte string; convert it to wide 297 * characters first. 298 */ 299 if (prec >= 0) { 300 /* 301 * String is not guaranteed to be NUL-terminated. Find the 302 * number of characters to print. 303 */ 304 p = mbsarg; 305 insize = nchars = nconv = 0; 306 mbs = initial_mbs; 307 while (nchars != (size_t)prec) { 308 nconv = mbrlen(p, MB_CUR_MAX, &mbs); 309 if (nconv == 0 || nconv == (size_t)-1 || 310 nconv == (size_t)-2) 311 break; 312 p += nconv; 313 nchars++; 314 insize += nconv; 315 } 316 if (nconv == (size_t)-1 || nconv == (size_t)-2) 317 return (NULL); 318 } else { 319 insize = strlen(mbsarg); 320 nconv = 0; 321 } 322 323 /* 324 * Allocate buffer for the result and perform the conversion, 325 * converting at most `size' bytes of the input multibyte string to 326 * wide characters for printing. 327 */ 328 convbuf = malloc((insize + 1) * sizeof(*convbuf)); 329 if (convbuf == NULL) 330 return (NULL); 331 wcp = convbuf; 332 p = mbsarg; 333 mbs = initial_mbs; 334 while (insize != 0) { 335 nconv = mbrtowc(wcp, p, insize, &mbs); 336 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2) 337 break; 338 wcp++; 339 p += nconv; 340 insize -= nconv; 341 } 342 if (nconv == (size_t)-1 || nconv == (size_t)-2) { 343 free(convbuf); 344 return (NULL); 345 } 346 *wcp = L'\0'; 347 348 return (convbuf); 349 } 350 351 /* 352 * MT-safe version 353 */ 354 int 355 vfwprintf_l(FILE * __restrict fp, locale_t locale, 356 const wchar_t * __restrict fmt0, va_list ap) 357 358 { 359 int ret; 360 FIX_LOCALE(locale); 361 FLOCKFILE_CANCELSAFE(fp); 362 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 363 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 364 fp->_file >= 0) 365 ret = __sbprintf(fp, locale, fmt0, ap); 366 else 367 ret = __vfwprintf(fp, locale, fmt0, ap); 368 FUNLOCKFILE_CANCELSAFE(); 369 return (ret); 370 } 371 int 372 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap) 373 { 374 return vfwprintf_l(fp, __get_locale(), fmt0, ap); 375 } 376 377 /* 378 * The size of the buffer we use as scratch space for integer 379 * conversions, among other things. We need enough space to 380 * write a uintmax_t in octal (plus one byte). 381 */ 382 #if UINTMAX_MAX <= UINT64_MAX 383 #define BUF 32 384 #else 385 #error "BUF must be large enough to format a uintmax_t" 386 #endif 387 388 /* 389 * Non-MT-safe version 390 */ 391 int 392 __vfwprintf(FILE *fp, locale_t locale, const wchar_t *fmt0, va_list ap) 393 { 394 wchar_t *fmt; /* format string */ 395 wchar_t ch; /* character from fmt */ 396 int n, n2; /* handy integer (short term usage) */ 397 wchar_t *cp; /* handy char pointer (short term usage) */ 398 int flags; /* flags as above */ 399 int ret; /* return value accumulator */ 400 int width; /* width from format (%8d), or 0 */ 401 int prec; /* precision from format; <0 for N/A */ 402 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */ 403 struct grouping_state gs; /* thousands' grouping info */ 404 #ifndef NO_FLOATING_POINT 405 /* 406 * We can decompose the printed representation of floating 407 * point numbers into several parts, some of which may be empty: 408 * 409 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 410 * A B ---C--- D E F 411 * 412 * A: 'sign' holds this value if present; '\0' otherwise 413 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 414 * C: cp points to the string MMMNNN. Leading and trailing 415 * zeros are not in the string and must be added. 416 * D: expchar holds this character; '\0' if no exponent, e.g. %f 417 * F: at least two digits for decimal, at least one digit for hex 418 */ 419 wchar_t decimal_point; /* locale specific decimal point */ 420 int signflag; /* true if float is negative */ 421 union { /* floating point arguments %[aAeEfFgG] */ 422 double dbl; 423 long double ldbl; 424 } fparg; 425 int expt; /* integer value of exponent */ 426 char expchar; /* exponent character: [eEpP\0] */ 427 char *dtoaend; /* pointer to end of converted digits */ 428 int expsize; /* character count for expstr */ 429 int ndig; /* actual number of digits returned by dtoa */ 430 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 431 char *dtoaresult; /* buffer allocated by dtoa */ 432 #endif 433 u_long ulval; /* integer arguments %[diouxX] */ 434 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */ 435 int base; /* base for [diouxX] conversion */ 436 int dprec; /* a copy of prec if [diouxX], 0 otherwise */ 437 int realsz; /* field size expanded by dprec, sign, etc */ 438 int size; /* size of converted field or string */ 439 int prsize; /* max size of printed field */ 440 const char *xdigs; /* digits for [xX] conversion */ 441 struct io_state io; /* I/O buffering state */ 442 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */ 443 wchar_t ox[2]; /* space for 0x hex-prefix */ 444 union arg *argtable; /* args, built due to positional arg */ 445 union arg statargtable [STATIC_ARG_TBL_SIZE]; 446 int nextarg; /* 1-based argument index */ 447 va_list orgap; /* original argument pointer */ 448 wchar_t *convbuf; /* multibyte to wide conversion result */ 449 int savserr; 450 451 static const char xdigs_lower[16] = "0123456789abcdef"; 452 static const char xdigs_upper[16] = "0123456789ABCDEF"; 453 454 /* BEWARE, these `goto error' on error. */ 455 #define PRINT(ptr, len) do { \ 456 if (io_print(&io, (ptr), (len), locale)) \ 457 goto error; \ 458 } while (0) 459 #define PAD(howmany, with) { \ 460 if (io_pad(&io, (howmany), (with), locale)) \ 461 goto error; \ 462 } 463 #define PRINTANDPAD(p, ep, len, with) { \ 464 if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \ 465 goto error; \ 466 } 467 #define FLUSH() { \ 468 if (io_flush(&io, locale)) \ 469 goto error; \ 470 } 471 472 /* 473 * Get the argument indexed by nextarg. If the argument table is 474 * built, use it to get the argument. If its not, get the next 475 * argument (and arguments must be gotten sequentially). 476 */ 477 #define GETARG(type) \ 478 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 479 (nextarg++, va_arg(ap, type))) 480 481 /* 482 * To extend shorts properly, we need both signed and unsigned 483 * argument extraction methods. 484 */ 485 #define SARG() \ 486 (flags&LONGINT ? GETARG(long) : \ 487 flags&SHORTINT ? (long)(short)GETARG(int) : \ 488 flags&CHARINT ? (long)(signed char)GETARG(int) : \ 489 (long)GETARG(int)) 490 #define UARG() \ 491 (flags&LONGINT ? GETARG(u_long) : \ 492 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \ 493 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \ 494 (u_long)GETARG(u_int)) 495 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT) 496 #define SJARG() \ 497 (flags&INTMAXT ? GETARG(intmax_t) : \ 498 flags&SIZET ? (intmax_t)GETARG(ssize_t) : \ 499 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \ 500 (intmax_t)GETARG(long long)) 501 #define UJARG() \ 502 (flags&INTMAXT ? GETARG(uintmax_t) : \ 503 flags&SIZET ? (uintmax_t)GETARG(size_t) : \ 504 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \ 505 (uintmax_t)GETARG(unsigned long long)) 506 507 /* 508 * Get * arguments, including the form *nn$. Preserve the nextarg 509 * that the argument can be gotten once the type is determined. 510 */ 511 #define GETASTER(val) \ 512 n2 = 0; \ 513 cp = fmt; \ 514 while (is_digit(*cp)) { \ 515 n2 = 10 * n2 + to_digit(*cp); \ 516 cp++; \ 517 } \ 518 if (*cp == '$') { \ 519 int hold = nextarg; \ 520 if (argtable == NULL) { \ 521 argtable = statargtable; \ 522 if (__find_warguments (fmt0, orgap, &argtable)) { \ 523 ret = EOF; \ 524 goto error; \ 525 } \ 526 } \ 527 nextarg = n2; \ 528 val = GETARG (int); \ 529 nextarg = hold; \ 530 fmt = ++cp; \ 531 } else { \ 532 val = GETARG (int); \ 533 } 534 535 536 /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */ 537 if (prepwrite(fp) != 0) { 538 errno = EBADF; 539 return (EOF); 540 } 541 542 savserr = fp->_flags & __SERR; 543 fp->_flags &= ~__SERR; 544 545 convbuf = NULL; 546 fmt = (wchar_t *)fmt0; 547 argtable = NULL; 548 nextarg = 1; 549 va_copy(orgap, ap); 550 io_init(&io, fp); 551 ret = 0; 552 #ifndef NO_FLOATING_POINT 553 decimal_point = get_decpt(locale); 554 #endif 555 556 /* 557 * Scan the format for conversions (`%' character). 558 */ 559 for (;;) { 560 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 561 /* void */; 562 if ((n = fmt - cp) != 0) { 563 if ((unsigned)ret + n > INT_MAX) { 564 ret = EOF; 565 errno = EOVERFLOW; 566 goto error; 567 } 568 PRINT(cp, n); 569 ret += n; 570 } 571 if (ch == '\0') 572 goto done; 573 fmt++; /* skip over '%' */ 574 575 flags = 0; 576 dprec = 0; 577 width = 0; 578 prec = -1; 579 gs.grouping = NULL; 580 sign = '\0'; 581 ox[1] = '\0'; 582 583 rflag: ch = *fmt++; 584 reswitch: switch (ch) { 585 case ' ': 586 /*- 587 * ``If the space and + flags both appear, the space 588 * flag will be ignored.'' 589 * -- ANSI X3J11 590 */ 591 if (!sign) 592 sign = ' '; 593 goto rflag; 594 case '#': 595 flags |= ALT; 596 goto rflag; 597 case '*': 598 /*- 599 * ``A negative field width argument is taken as a 600 * - flag followed by a positive field width.'' 601 * -- ANSI X3J11 602 * They don't exclude field widths read from args. 603 */ 604 GETASTER (width); 605 if (width >= 0) 606 goto rflag; 607 width = -width; 608 /* FALLTHROUGH */ 609 case '-': 610 flags |= LADJUST; 611 goto rflag; 612 case '+': 613 sign = '+'; 614 goto rflag; 615 case '\'': 616 flags |= GROUPING; 617 goto rflag; 618 case '.': 619 if ((ch = *fmt++) == '*') { 620 GETASTER (prec); 621 goto rflag; 622 } 623 prec = 0; 624 while (is_digit(ch)) { 625 prec = 10 * prec + to_digit(ch); 626 ch = *fmt++; 627 } 628 goto reswitch; 629 case '0': 630 /*- 631 * ``Note that 0 is taken as a flag, not as the 632 * beginning of a field width.'' 633 * -- ANSI X3J11 634 */ 635 flags |= ZEROPAD; 636 goto rflag; 637 case '1': case '2': case '3': case '4': 638 case '5': case '6': case '7': case '8': case '9': 639 n = 0; 640 do { 641 n = 10 * n + to_digit(ch); 642 ch = *fmt++; 643 } while (is_digit(ch)); 644 if (ch == '$') { 645 nextarg = n; 646 if (argtable == NULL) { 647 argtable = statargtable; 648 if (__find_warguments (fmt0, orgap, 649 &argtable)) { 650 ret = EOF; 651 goto error; 652 } 653 } 654 goto rflag; 655 } 656 width = n; 657 goto reswitch; 658 #ifndef NO_FLOATING_POINT 659 case 'L': 660 flags |= LONGDBL; 661 goto rflag; 662 #endif 663 case 'h': 664 if (flags & SHORTINT) { 665 flags &= ~SHORTINT; 666 flags |= CHARINT; 667 } else 668 flags |= SHORTINT; 669 goto rflag; 670 case 'j': 671 flags |= INTMAXT; 672 goto rflag; 673 case 'l': 674 if (flags & LONGINT) { 675 flags &= ~LONGINT; 676 flags |= LLONGINT; 677 } else 678 flags |= LONGINT; 679 goto rflag; 680 case 'q': 681 flags |= LLONGINT; /* not necessarily */ 682 goto rflag; 683 case 't': 684 flags |= PTRDIFFT; 685 goto rflag; 686 case 'z': 687 flags |= SIZET; 688 goto rflag; 689 case 'C': 690 flags |= LONGINT; 691 /*FALLTHROUGH*/ 692 case 'c': 693 if (flags & LONGINT) 694 *(cp = buf) = (wchar_t)GETARG(wint_t); 695 else 696 *(cp = buf) = (wchar_t)btowc(GETARG(int)); 697 size = 1; 698 sign = '\0'; 699 break; 700 case 'D': 701 flags |= LONGINT; 702 /*FALLTHROUGH*/ 703 case 'd': 704 case 'i': 705 if (flags & INTMAX_SIZE) { 706 ujval = SJARG(); 707 if ((intmax_t)ujval < 0) { 708 ujval = -ujval; 709 sign = '-'; 710 } 711 } else { 712 ulval = SARG(); 713 if ((long)ulval < 0) { 714 ulval = -ulval; 715 sign = '-'; 716 } 717 } 718 base = 10; 719 goto number; 720 #ifndef NO_FLOATING_POINT 721 case 'a': 722 case 'A': 723 if (ch == 'a') { 724 ox[1] = 'x'; 725 xdigs = xdigs_lower; 726 expchar = 'p'; 727 } else { 728 ox[1] = 'X'; 729 xdigs = xdigs_upper; 730 expchar = 'P'; 731 } 732 if (prec >= 0) 733 prec++; 734 if (flags & LONGDBL) { 735 fparg.ldbl = GETARG(long double); 736 dtoaresult = 737 __hldtoa(fparg.ldbl, xdigs, prec, 738 &expt, &signflag, &dtoaend); 739 } else { 740 fparg.dbl = GETARG(double); 741 dtoaresult = 742 __hdtoa(fparg.dbl, xdigs, prec, 743 &expt, &signflag, &dtoaend); 744 } 745 if (prec < 0) 746 prec = dtoaend - dtoaresult; 747 if (expt == INT_MAX) 748 ox[1] = '\0'; 749 if (convbuf != NULL) 750 free(convbuf); 751 ndig = dtoaend - dtoaresult; 752 cp = convbuf = __mbsconv(dtoaresult, -1); 753 freedtoa(dtoaresult); 754 goto fp_common; 755 case 'e': 756 case 'E': 757 expchar = ch; 758 if (prec < 0) /* account for digit before decpt */ 759 prec = DEFPREC + 1; 760 else 761 prec++; 762 goto fp_begin; 763 case 'f': 764 case 'F': 765 expchar = '\0'; 766 goto fp_begin; 767 case 'g': 768 case 'G': 769 expchar = ch - ('g' - 'e'); 770 if (prec == 0) 771 prec = 1; 772 fp_begin: 773 if (prec < 0) 774 prec = DEFPREC; 775 if (convbuf != NULL) 776 free(convbuf); 777 if (flags & LONGDBL) { 778 fparg.ldbl = GETARG(long double); 779 dtoaresult = 780 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 781 &expt, &signflag, &dtoaend); 782 } else { 783 fparg.dbl = GETARG(double); 784 dtoaresult = 785 dtoa(fparg.dbl, expchar ? 2 : 3, prec, 786 &expt, &signflag, &dtoaend); 787 if (expt == 9999) 788 expt = INT_MAX; 789 } 790 ndig = dtoaend - dtoaresult; 791 cp = convbuf = __mbsconv(dtoaresult, -1); 792 freedtoa(dtoaresult); 793 fp_common: 794 if (signflag) 795 sign = '-'; 796 if (expt == INT_MAX) { /* inf or nan */ 797 if (*cp == 'N') { 798 cp = (ch >= 'a') ? L"nan" : L"NAN"; 799 sign = '\0'; 800 } else 801 cp = (ch >= 'a') ? L"inf" : L"INF"; 802 size = 3; 803 flags &= ~ZEROPAD; 804 break; 805 } 806 flags |= FPT; 807 if (ch == 'g' || ch == 'G') { 808 if (expt > -4 && expt <= prec) { 809 /* Make %[gG] smell like %[fF] */ 810 expchar = '\0'; 811 if (flags & ALT) 812 prec -= expt; 813 else 814 prec = ndig - expt; 815 if (prec < 0) 816 prec = 0; 817 } else { 818 /* 819 * Make %[gG] smell like %[eE], but 820 * trim trailing zeroes if no # flag. 821 */ 822 if (!(flags & ALT)) 823 prec = ndig; 824 } 825 } 826 if (expchar) { 827 expsize = exponent(expstr, expt - 1, expchar); 828 size = expsize + prec; 829 if (prec > 1 || flags & ALT) 830 ++size; 831 } else { 832 /* space for digits before decimal point */ 833 if (expt > 0) 834 size = expt; 835 else /* "0" */ 836 size = 1; 837 /* space for decimal pt and following digits */ 838 if (prec || flags & ALT) 839 size += prec + 1; 840 if ((flags & GROUPING) && expt > 0) 841 size += grouping_init(&gs, expt, locale); 842 } 843 break; 844 #endif /* !NO_FLOATING_POINT */ 845 case 'n': 846 /* 847 * Assignment-like behavior is specified if the 848 * value overflows or is otherwise unrepresentable. 849 * C99 says to use `signed char' for %hhn conversions. 850 */ 851 if (flags & LLONGINT) 852 *GETARG(long long *) = ret; 853 else if (flags & SIZET) 854 *GETARG(ssize_t *) = (ssize_t)ret; 855 else if (flags & PTRDIFFT) 856 *GETARG(ptrdiff_t *) = ret; 857 else if (flags & INTMAXT) 858 *GETARG(intmax_t *) = ret; 859 else if (flags & LONGINT) 860 *GETARG(long *) = ret; 861 else if (flags & SHORTINT) 862 *GETARG(short *) = ret; 863 else if (flags & CHARINT) 864 *GETARG(signed char *) = ret; 865 else 866 *GETARG(int *) = ret; 867 continue; /* no output */ 868 case 'O': 869 flags |= LONGINT; 870 /*FALLTHROUGH*/ 871 case 'o': 872 if (flags & INTMAX_SIZE) 873 ujval = UJARG(); 874 else 875 ulval = UARG(); 876 base = 8; 877 goto nosign; 878 case 'p': 879 /*- 880 * ``The argument shall be a pointer to void. The 881 * value of the pointer is converted to a sequence 882 * of printable characters, in an implementation- 883 * defined manner.'' 884 * -- ANSI X3J11 885 */ 886 ujval = (uintmax_t)(uintptr_t)GETARG(void *); 887 base = 16; 888 xdigs = xdigs_lower; 889 flags = flags | INTMAXT; 890 ox[1] = 'x'; 891 goto nosign; 892 case 'S': 893 flags |= LONGINT; 894 /*FALLTHROUGH*/ 895 case 's': 896 if (flags & LONGINT) { 897 if ((cp = GETARG(wchar_t *)) == NULL) 898 cp = L"(null)"; 899 } else { 900 char *mbp; 901 902 if (convbuf != NULL) 903 free(convbuf); 904 if ((mbp = GETARG(char *)) == NULL) 905 cp = L"(null)"; 906 else { 907 convbuf = __mbsconv(mbp, prec); 908 if (convbuf == NULL) { 909 fp->_flags |= __SERR; 910 goto error; 911 } 912 cp = convbuf; 913 } 914 } 915 size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(cp); 916 sign = '\0'; 917 break; 918 case 'U': 919 flags |= LONGINT; 920 /*FALLTHROUGH*/ 921 case 'u': 922 if (flags & INTMAX_SIZE) 923 ujval = UJARG(); 924 else 925 ulval = UARG(); 926 base = 10; 927 goto nosign; 928 case 'X': 929 xdigs = xdigs_upper; 930 goto hex; 931 case 'x': 932 xdigs = xdigs_lower; 933 hex: 934 if (flags & INTMAX_SIZE) 935 ujval = UJARG(); 936 else 937 ulval = UARG(); 938 base = 16; 939 /* leading 0x/X only if non-zero */ 940 if (flags & ALT && 941 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0)) 942 ox[1] = ch; 943 944 flags &= ~GROUPING; 945 /* unsigned conversions */ 946 nosign: sign = '\0'; 947 /*- 948 * ``... diouXx conversions ... if a precision is 949 * specified, the 0 flag will be ignored.'' 950 * -- ANSI X3J11 951 */ 952 number: if ((dprec = prec) >= 0) 953 flags &= ~ZEROPAD; 954 955 /*- 956 * ``The result of converting a zero value with an 957 * explicit precision of zero is no characters.'' 958 * -- ANSI X3J11 959 * 960 * ``The C Standard is clear enough as is. The call 961 * printf("%#.0o", 0) should print 0.'' 962 * -- Defect Report #151 963 */ 964 cp = buf + BUF; 965 if (flags & INTMAX_SIZE) { 966 if (ujval != 0 || prec != 0 || 967 (flags & ALT && base == 8)) 968 cp = __ujtoa(ujval, cp, base, 969 flags & ALT, xdigs); 970 } else { 971 if (ulval != 0 || prec != 0 || 972 (flags & ALT && base == 8)) 973 cp = __ultoa(ulval, cp, base, 974 flags & ALT, xdigs); 975 } 976 size = buf + BUF - cp; 977 if (size > BUF) /* should never happen */ 978 abort(); 979 if ((flags & GROUPING) && size != 0) 980 size += grouping_init(&gs, size, locale); 981 break; 982 default: /* "%?" prints ?, unless ? is NUL */ 983 if (ch == '\0') 984 goto done; 985 /* pretend it was %c with argument ch */ 986 cp = buf; 987 *cp = ch; 988 size = 1; 989 sign = '\0'; 990 break; 991 } 992 993 /* 994 * All reasonable formats wind up here. At this point, `cp' 995 * points to a string which (if not flags&LADJUST) should be 996 * padded out to `width' places. If flags&ZEROPAD, it should 997 * first be prefixed by any sign or other prefix; otherwise, 998 * it should be blank padded before the prefix is emitted. 999 * After any left-hand padding and prefixing, emit zeroes 1000 * required by a decimal [diouxX] precision, then print the 1001 * string proper, then emit zeroes required by any leftover 1002 * floating precision; finally, if LADJUST, pad with blanks. 1003 * 1004 * Compute actual size, so we know how much to pad. 1005 * size excludes decimal prec; realsz includes it. 1006 */ 1007 realsz = dprec > size ? dprec : size; 1008 if (sign) 1009 realsz++; 1010 if (ox[1]) 1011 realsz += 2; 1012 1013 prsize = width > realsz ? width : realsz; 1014 if ((unsigned)ret + prsize > INT_MAX) { 1015 ret = EOF; 1016 errno = EOVERFLOW; 1017 goto error; 1018 } 1019 1020 /* right-adjusting blank padding */ 1021 if ((flags & (LADJUST|ZEROPAD)) == 0) 1022 PAD(width - realsz, blanks); 1023 1024 /* prefix */ 1025 if (sign) 1026 PRINT(&sign, 1); 1027 1028 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1029 ox[0] = '0'; 1030 PRINT(ox, 2); 1031 } 1032 1033 /* right-adjusting zero padding */ 1034 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1035 PAD(width - realsz, zeroes); 1036 1037 /* the string or number proper */ 1038 #ifndef NO_FLOATING_POINT 1039 if ((flags & FPT) == 0) { 1040 #endif 1041 /* leading zeroes from decimal precision */ 1042 PAD(dprec - size, zeroes); 1043 if (gs.grouping) { 1044 if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0) 1045 goto error; 1046 } else { 1047 PRINT(cp, size); 1048 } 1049 #ifndef NO_FLOATING_POINT 1050 } else { /* glue together f_p fragments */ 1051 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1052 if (expt <= 0) { 1053 PRINT(zeroes, 1); 1054 if (prec || flags & ALT) 1055 PRINT(&decimal_point, 1); 1056 PAD(-expt, zeroes); 1057 /* already handled initial 0's */ 1058 prec += expt; 1059 } else { 1060 if (gs.grouping) { 1061 n = grouping_print(&gs, &io, 1062 cp, convbuf + ndig, locale); 1063 if (n < 0) 1064 goto error; 1065 cp += n; 1066 } else { 1067 PRINTANDPAD(cp, convbuf + ndig, 1068 expt, zeroes); 1069 cp += expt; 1070 } 1071 if (prec || flags & ALT) 1072 PRINT(&decimal_point, 1); 1073 } 1074 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes); 1075 } else { /* %[eE] or sufficiently long %[gG] */ 1076 if (prec > 1 || flags & ALT) { 1077 buf[0] = *cp++; 1078 buf[1] = decimal_point; 1079 PRINT(buf, 2); 1080 PRINT(cp, ndig-1); 1081 PAD(prec - ndig, zeroes); 1082 } else /* XeYYY */ 1083 PRINT(cp, 1); 1084 PRINT(expstr, expsize); 1085 } 1086 } 1087 #endif 1088 /* left-adjusting padding (always blank) */ 1089 if (flags & LADJUST) 1090 PAD(width - realsz, blanks); 1091 1092 /* finally, adjust ret */ 1093 ret += prsize; 1094 1095 FLUSH(); /* copy out the I/O vectors */ 1096 } 1097 done: 1098 FLUSH(); 1099 error: 1100 va_end(orgap); 1101 if (convbuf != NULL) 1102 free(convbuf); 1103 if (__sferror(fp)) 1104 ret = EOF; 1105 else 1106 fp->_flags |= savserr; 1107 if ((argtable != NULL) && (argtable != statargtable)) 1108 free (argtable); 1109 return (ret); 1110 /* NOTREACHED */ 1111 } 1112