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