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