1/* $OpenBSD: vfprintf.c,v 1.71 2016/01/04 15:47:47 schwarze Exp $ */ 2/*- 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Chris Torek. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34/* 35 * Actual printf innards. 36 * 37 * This code is large and complicated... 38 */ 39 40#include <sys/types.h> 41#include <sys/mman.h> 42 43#include <errno.h> 44#include <langinfo.h> 45#include <limits.h> 46#include <stdarg.h> 47#include <stddef.h> 48#include <stdio.h> 49#include <stdint.h> 50#include <stdlib.h> 51#include <string.h> 52#include <unistd.h> 53#include <wchar.h> 54 55#include "local.h" 56#include "fvwrite.h" 57 58union arg { 59 int intarg; 60 unsigned int uintarg; 61 long longarg; 62 unsigned long ulongarg; 63 long long longlongarg; 64 unsigned long long ulonglongarg; 65 ptrdiff_t ptrdiffarg; 66 size_t sizearg; 67 ssize_t ssizearg; 68 intmax_t intmaxarg; 69 uintmax_t uintmaxarg; 70 void *pvoidarg; 71 char *pchararg; 72 signed char *pschararg; 73 short *pshortarg; 74 int *pintarg; 75 long *plongarg; 76 long long *plonglongarg; 77 ptrdiff_t *pptrdiffarg; 78 ssize_t *pssizearg; 79 intmax_t *pintmaxarg; 80#ifdef FLOATING_POINT 81 double doublearg; 82 long double longdoublearg; 83#endif 84#ifdef PRINTF_WIDE_CHAR 85 wint_t wintarg; 86 wchar_t *pwchararg; 87#endif 88}; 89 90static int __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 91 size_t *argtablesiz); 92static int __grow_type_table(unsigned char **typetable, int *tablesize); 93 94/* 95 * Flush out all the vectors defined by the given uio, 96 * then reset it so that it can be reused. 97 */ 98static int 99__sprint(FILE *fp, struct __suio *uio) 100{ 101 int err; 102 103 if (uio->uio_resid == 0) { 104 uio->uio_iovcnt = 0; 105 return (0); 106 } 107 err = __sfvwrite(fp, uio); 108 uio->uio_resid = 0; 109 uio->uio_iovcnt = 0; 110 return (err); 111} 112 113/* 114 * Helper function for `fprintf to unbuffered unix file': creates a 115 * temporary buffer. We only work on write-only files; this avoids 116 * worries about ungetc buffers and so forth. 117 */ 118static int 119__sbprintf(FILE *fp, const char *fmt, va_list ap) 120{ 121 int ret; 122 FILE fake; 123 struct __sfileext fakeext; 124 unsigned char buf[BUFSIZ]; 125 126 _FILEEXT_SETUP(&fake, &fakeext); 127 /* copy the important variables */ 128 fake._flags = fp->_flags & ~__SNBF; 129 fake._file = fp->_file; 130 fake._cookie = fp->_cookie; 131 fake._write = fp->_write; 132 133 /* set up the buffer */ 134 fake._bf._base = fake._p = buf; 135 fake._bf._size = fake._w = sizeof(buf); 136 fake._lbfsize = 0; /* not actually used, but Just In Case */ 137 138 /* do the work, then copy any error status */ 139 ret = __vfprintf(&fake, fmt, ap); 140 if (ret >= 0 && __sflush(&fake)) 141 ret = EOF; 142 if (fake._flags & __SERR) 143 fp->_flags |= __SERR; 144 return (ret); 145} 146 147#ifdef PRINTF_WIDE_CHAR 148/* 149 * Convert a wide character string argument for the %ls format to a multibyte 150 * string representation. If not -1, prec specifies the maximum number of 151 * bytes to output, and also means that we can't assume that the wide char 152 * string is null-terminated. 153 */ 154static char * 155__wcsconv(wchar_t *wcsarg, int prec) 156{ 157 mbstate_t mbs; 158 char buf[MB_LEN_MAX]; 159 wchar_t *p; 160 char *convbuf; 161 size_t clen, nbytes; 162 163 /* Allocate space for the maximum number of bytes we could output. */ 164 if (prec < 0) { 165 memset(&mbs, 0, sizeof(mbs)); 166 p = wcsarg; 167 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs); 168 if (nbytes == (size_t)-1) 169 return (NULL); 170 } else { 171 /* 172 * Optimisation: if the output precision is small enough, 173 * just allocate enough memory for the maximum instead of 174 * scanning the string. 175 */ 176 if (prec < 128) 177 nbytes = prec; 178 else { 179 nbytes = 0; 180 p = wcsarg; 181 memset(&mbs, 0, sizeof(mbs)); 182 for (;;) { 183 clen = wcrtomb(buf, *p++, &mbs); 184 if (clen == 0 || clen == (size_t)-1 || 185 nbytes + clen > (size_t)prec) 186 break; 187 nbytes += clen; 188 } 189 if (clen == (size_t)-1) 190 return (NULL); 191 } 192 } 193 if ((convbuf = malloc(nbytes + 1)) == NULL) 194 return (NULL); 195 196 /* Fill the output buffer. */ 197 p = wcsarg; 198 memset(&mbs, 0, sizeof(mbs)); 199 if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p, 200 nbytes, &mbs)) == (size_t)-1) { 201 free(convbuf); 202 return (NULL); 203 } 204 convbuf[nbytes] = '\0'; 205 return (convbuf); 206} 207#endif 208 209#ifdef FLOATING_POINT 210#include <float.h> 211#include <locale.h> 212#include <math.h> 213#include "floatio.h" 214#include "gdtoa.h" 215 216#define DEFPREC 6 217 218static int exponent(char *, int, int); 219#endif /* FLOATING_POINT */ 220 221/* 222 * The size of the buffer we use as scratch space for integer 223 * conversions, among other things. Technically, we would need the 224 * most space for base 10 conversions with thousands' grouping 225 * characters between each pair of digits. 100 bytes is a 226 * conservative overestimate even for a 128-bit uintmax_t. 227 */ 228#define BUF 100 229 230#define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 231 232 233/* 234 * Macros for converting digits to letters and vice versa 235 */ 236#define to_digit(c) ((c) - '0') 237#define is_digit(c) ((unsigned)to_digit(c) <= 9) 238#define to_char(n) ((n) + '0') 239 240/* 241 * Flags used during conversion. 242 */ 243#define ALT 0x0001 /* alternate form */ 244#define LADJUST 0x0004 /* left adjustment */ 245#define LONGDBL 0x0008 /* long double */ 246#define LONGINT 0x0010 /* long integer */ 247#define LLONGINT 0x0020 /* long long integer */ 248#define SHORTINT 0x0040 /* short integer */ 249#define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ 250#define FPT 0x0100 /* Floating point number */ 251#define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ 252#define SIZEINT 0x0400 /* (signed) size_t */ 253#define CHARINT 0x0800 /* 8 bit integer */ 254#define MAXINT 0x1000 /* largest integer size (intmax_t) */ 255 256int 257vfprintf(FILE *fp, const char *fmt0, __va_list ap) 258{ 259 int ret; 260 261 FLOCKFILE(fp); 262 ret = __vfprintf(fp, fmt0, ap); 263 FUNLOCKFILE(fp); 264 return (ret); 265} 266DEF_STRONG(vfprintf); 267 268int 269__vfprintf(FILE *fp, const char *fmt0, __va_list ap) 270{ 271 char *fmt; /* format string */ 272 int ch; /* character from fmt */ 273 int n, n2; /* handy integers (short term usage) */ 274 char *cp; /* handy char pointer (short term usage) */ 275 struct __siov *iovp; /* for PRINT macro */ 276 int flags; /* flags as above */ 277 int ret; /* return value accumulator */ 278 int width; /* width from format (%8d), or 0 */ 279 int prec; /* precision from format; <0 for N/A */ 280 char sign; /* sign prefix (' ', '+', '-', or \0) */ 281 wchar_t wc; 282 mbstate_t ps; 283#ifdef FLOATING_POINT 284 /* 285 * We can decompose the printed representation of floating 286 * point numbers into several parts, some of which may be empty: 287 * 288 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 289 * A B ---C--- D E F 290 * 291 * A: 'sign' holds this value if present; '\0' otherwise 292 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 293 * C: cp points to the string MMMNNN. Leading and trailing 294 * zeros are not in the string and must be added. 295 * D: expchar holds this character; '\0' if no exponent, e.g. %f 296 * F: at least two digits for decimal, at least one digit for hex 297 */ 298 char *decimal_point = NULL; 299 int signflag; /* true if float is negative */ 300 union { /* floating point arguments %[aAeEfFgG] */ 301 double dbl; 302 long double ldbl; 303 } fparg; 304 int expt; /* integer value of exponent */ 305 char expchar; /* exponent character: [eEpP\0] */ 306 char *dtoaend; /* pointer to end of converted digits */ 307 int expsize; /* character count for expstr */ 308 int lead; /* sig figs before decimal or group sep */ 309 int ndig; /* actual number of digits returned by dtoa */ 310 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 311 char *dtoaresult = NULL; 312#endif 313 314 uintmax_t _umax; /* integer arguments %[diouxX] */ 315 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 316 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 317 int realsz; /* field size expanded by dprec */ 318 int size; /* size of converted field or string */ 319 const char *xdigs; /* digits for %[xX] conversion */ 320#define NIOV 8 321 struct __suio uio; /* output information: summary */ 322 struct __siov iov[NIOV];/* ... and individual io vectors */ 323 char buf[BUF]; /* buffer with space for digits of uintmax_t */ 324 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 325 union arg *argtable; /* args, built due to positional arg */ 326 union arg statargtable[STATIC_ARG_TBL_SIZE]; 327 size_t argtablesiz; 328 int nextarg; /* 1-based argument index */ 329 va_list orgap; /* original argument pointer */ 330#ifdef PRINTF_WIDE_CHAR 331 char *convbuf; /* buffer for wide to multi-byte conversion */ 332#endif 333 334 /* 335 * Choose PADSIZE to trade efficiency vs. size. If larger printf 336 * fields occur frequently, increase PADSIZE and make the initialisers 337 * below longer. 338 */ 339#define PADSIZE 16 /* pad chunk size */ 340 static char blanks[PADSIZE] = 341 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 342 static char zeroes[PADSIZE] = 343 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 344 345 static const char xdigs_lower[16] = "0123456789abcdef"; 346 static const char xdigs_upper[16] = "0123456789ABCDEF"; 347 348 /* 349 * BEWARE, these `goto error' on error, and PAD uses `n'. 350 */ 351#define PRINT(ptr, len) do { \ 352 iovp->iov_base = (ptr); \ 353 iovp->iov_len = (len); \ 354 uio.uio_resid += (len); \ 355 iovp++; \ 356 if (++uio.uio_iovcnt >= NIOV) { \ 357 if (__sprint(fp, &uio)) \ 358 goto error; \ 359 iovp = iov; \ 360 } \ 361} while (0) 362#define PAD(howmany, with) do { \ 363 if ((n = (howmany)) > 0) { \ 364 while (n > PADSIZE) { \ 365 PRINT(with, PADSIZE); \ 366 n -= PADSIZE; \ 367 } \ 368 PRINT(with, n); \ 369 } \ 370} while (0) 371#define PRINTANDPAD(p, ep, len, with) do { \ 372 n2 = (ep) - (p); \ 373 if (n2 > (len)) \ 374 n2 = (len); \ 375 if (n2 > 0) \ 376 PRINT((p), n2); \ 377 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 378} while(0) 379#define FLUSH() do { \ 380 if (uio.uio_resid && __sprint(fp, &uio)) \ 381 goto error; \ 382 uio.uio_iovcnt = 0; \ 383 iovp = iov; \ 384} while (0) 385 386 /* 387 * To extend shorts properly, we need both signed and unsigned 388 * argument extraction methods. 389 */ 390#define SARG() \ 391 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 392 flags&LLONGINT ? GETARG(long long) : \ 393 flags&LONGINT ? GETARG(long) : \ 394 flags&PTRINT ? GETARG(ptrdiff_t) : \ 395 flags&SIZEINT ? GETARG(ssize_t) : \ 396 flags&SHORTINT ? (short)GETARG(int) : \ 397 flags&CHARINT ? (signed char)GETARG(int) : \ 398 GETARG(int))) 399#define UARG() \ 400 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 401 flags&LLONGINT ? GETARG(unsigned long long) : \ 402 flags&LONGINT ? GETARG(unsigned long) : \ 403 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 404 flags&SIZEINT ? GETARG(size_t) : \ 405 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 406 flags&CHARINT ? (unsigned char)GETARG(int) : \ 407 GETARG(unsigned int))) 408 409 /* 410 * Append a digit to a value and check for overflow. 411 */ 412#define APPEND_DIGIT(val, dig) do { \ 413 if ((val) > INT_MAX / 10) \ 414 goto overflow; \ 415 (val) *= 10; \ 416 if ((val) > INT_MAX - to_digit((dig))) \ 417 goto overflow; \ 418 (val) += to_digit((dig)); \ 419} while (0) 420 421 /* 422 * Get * arguments, including the form *nn$. Preserve the nextarg 423 * that the argument can be gotten once the type is determined. 424 */ 425#define GETASTER(val) \ 426 n2 = 0; \ 427 cp = fmt; \ 428 while (is_digit(*cp)) { \ 429 APPEND_DIGIT(n2, *cp); \ 430 cp++; \ 431 } \ 432 if (*cp == '$') { \ 433 int hold = nextarg; \ 434 if (argtable == NULL) { \ 435 argtable = statargtable; \ 436 if (__find_arguments(fmt0, orgap, &argtable, \ 437 &argtablesiz) == -1) { \ 438 ret = -1; \ 439 goto error; \ 440 } \ 441 } \ 442 nextarg = n2; \ 443 val = GETARG(int); \ 444 nextarg = hold; \ 445 fmt = ++cp; \ 446 } else { \ 447 val = GETARG(int); \ 448 } 449 450/* 451* Get the argument indexed by nextarg. If the argument table is 452* built, use it to get the argument. If its not, get the next 453* argument (and arguments must be gotten sequentially). 454*/ 455#define GETARG(type) \ 456 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 457 (nextarg++, va_arg(ap, type))) 458 459 _SET_ORIENTATION(fp, -1); 460 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ 461 if (cantwrite(fp)) { 462 errno = EBADF; 463 return (EOF); 464 } 465 466 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 467 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 468 fp->_file >= 0) 469 return (__sbprintf(fp, fmt0, ap)); 470 471 fmt = (char *)fmt0; 472 argtable = NULL; 473 nextarg = 1; 474 va_copy(orgap, ap); 475 uio.uio_iov = iovp = iov; 476 uio.uio_resid = 0; 477 uio.uio_iovcnt = 0; 478 ret = 0; 479#ifdef PRINTF_WIDE_CHAR 480 convbuf = NULL; 481#endif 482 483 memset(&ps, 0, sizeof(ps)); 484 /* 485 * Scan the format for conversions (`%' character). 486 */ 487 for (;;) { 488 cp = fmt; 489 while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) { 490 fmt += n; 491 if (wc == '%') { 492 fmt--; 493 break; 494 } 495 } 496 if (n < 0) { 497 ret = -1; 498 goto error; 499 } 500 if (fmt != cp) { 501 ptrdiff_t m = fmt - cp; 502 if (m < 0 || m > INT_MAX - ret) 503 goto overflow; 504 PRINT(cp, m); 505 ret += m; 506 } 507 if (n == 0) 508 goto done; 509 fmt++; /* skip over '%' */ 510 511 flags = 0; 512 dprec = 0; 513 width = 0; 514 prec = -1; 515 sign = '\0'; 516 ox[1] = '\0'; 517 518rflag: ch = *fmt++; 519reswitch: switch (ch) { 520 case ' ': 521 /* 522 * ``If the space and + flags both appear, the space 523 * flag will be ignored.'' 524 * -- ANSI X3J11 525 */ 526 if (!sign) 527 sign = ' '; 528 goto rflag; 529 case '#': 530 flags |= ALT; 531 goto rflag; 532 case '\'': 533 /* grouping not implemented */ 534 goto rflag; 535 case '*': 536 /* 537 * ``A negative field width argument is taken as a 538 * - flag followed by a positive field width.'' 539 * -- ANSI X3J11 540 * They don't exclude field widths read from args. 541 */ 542 GETASTER(width); 543 if (width >= 0) 544 goto rflag; 545 if (width == INT_MIN) 546 goto overflow; 547 width = -width; 548 /* FALLTHROUGH */ 549 case '-': 550 flags |= LADJUST; 551 goto rflag; 552 case '+': 553 sign = '+'; 554 goto rflag; 555 case '.': 556 if ((ch = *fmt++) == '*') { 557 GETASTER(n); 558 prec = n < 0 ? -1 : n; 559 goto rflag; 560 } 561 n = 0; 562 while (is_digit(ch)) { 563 APPEND_DIGIT(n, ch); 564 ch = *fmt++; 565 } 566 if (ch == '$') { 567 nextarg = n; 568 if (argtable == NULL) { 569 argtable = statargtable; 570 if (__find_arguments(fmt0, orgap, 571 &argtable, &argtablesiz) == -1) { 572 ret = -1; 573 goto error; 574 } 575 } 576 goto rflag; 577 } 578 prec = n; 579 goto reswitch; 580 case '0': 581 /* 582 * ``Note that 0 is taken as a flag, not as the 583 * beginning of a field width.'' 584 * -- ANSI X3J11 585 */ 586 flags |= ZEROPAD; 587 goto rflag; 588 case '1': case '2': case '3': case '4': 589 case '5': case '6': case '7': case '8': case '9': 590 n = 0; 591 do { 592 APPEND_DIGIT(n, ch); 593 ch = *fmt++; 594 } while (is_digit(ch)); 595 if (ch == '$') { 596 nextarg = n; 597 if (argtable == NULL) { 598 argtable = statargtable; 599 if (__find_arguments(fmt0, orgap, 600 &argtable, &argtablesiz) == -1) { 601 ret = -1; 602 goto error; 603 } 604 } 605 goto rflag; 606 } 607 width = n; 608 goto reswitch; 609#ifdef FLOATING_POINT 610 case 'L': 611 flags |= LONGDBL; 612 goto rflag; 613#endif 614 case 'h': 615 if (*fmt == 'h') { 616 fmt++; 617 flags |= CHARINT; 618 } else { 619 flags |= SHORTINT; 620 } 621 goto rflag; 622 case 'j': 623 flags |= MAXINT; 624 goto rflag; 625 case 'l': 626 if (*fmt == 'l') { 627 fmt++; 628 flags |= LLONGINT; 629 } else { 630 flags |= LONGINT; 631 } 632 goto rflag; 633 case 'q': 634 flags |= LLONGINT; 635 goto rflag; 636 case 't': 637 flags |= PTRINT; 638 goto rflag; 639 case 'z': 640 flags |= SIZEINT; 641 goto rflag; 642 case 'c': 643#ifdef PRINTF_WIDE_CHAR 644 if (flags & LONGINT) { 645 mbstate_t mbs; 646 size_t mbseqlen; 647 648 memset(&mbs, 0, sizeof(mbs)); 649 mbseqlen = wcrtomb(buf, 650 (wchar_t)GETARG(wint_t), &mbs); 651 if (mbseqlen == (size_t)-1) { 652 ret = -1; 653 goto error; 654 } 655 cp = buf; 656 size = (int)mbseqlen; 657 } else { 658#endif 659 *(cp = buf) = GETARG(int); 660 size = 1; 661#ifdef PRINTF_WIDE_CHAR 662 } 663#endif 664 sign = '\0'; 665 break; 666 case 'D': 667 flags |= LONGINT; 668 /*FALLTHROUGH*/ 669 case 'd': 670 case 'i': 671 _umax = SARG(); 672 if ((intmax_t)_umax < 0) { 673 _umax = -_umax; 674 sign = '-'; 675 } 676 base = DEC; 677 goto number; 678#ifdef FLOATING_POINT 679 case 'a': 680 case 'A': 681 if (ch == 'a') { 682 ox[1] = 'x'; 683 xdigs = xdigs_lower; 684 expchar = 'p'; 685 } else { 686 ox[1] = 'X'; 687 xdigs = xdigs_upper; 688 expchar = 'P'; 689 } 690 if (prec >= 0) 691 prec++; 692 if (dtoaresult) 693 __freedtoa(dtoaresult); 694 if (flags & LONGDBL) { 695 fparg.ldbl = GETARG(long double); 696 dtoaresult = cp = 697 __hldtoa(fparg.ldbl, xdigs, prec, 698 &expt, &signflag, &dtoaend); 699 if (dtoaresult == NULL) { 700 errno = ENOMEM; 701 goto error; 702 } 703 } else { 704 fparg.dbl = GETARG(double); 705 dtoaresult = cp = 706 __hdtoa(fparg.dbl, xdigs, prec, 707 &expt, &signflag, &dtoaend); 708 if (dtoaresult == NULL) { 709 errno = ENOMEM; 710 goto error; 711 } 712 } 713 if (prec < 0) 714 prec = dtoaend - cp; 715 if (expt == INT_MAX) 716 ox[1] = '\0'; 717 goto fp_common; 718 case 'e': 719 case 'E': 720 expchar = ch; 721 if (prec < 0) /* account for digit before decpt */ 722 prec = DEFPREC + 1; 723 else 724 prec++; 725 goto fp_begin; 726 case 'f': 727 case 'F': 728 expchar = '\0'; 729 goto fp_begin; 730 case 'g': 731 case 'G': 732 expchar = ch - ('g' - 'e'); 733 if (prec == 0) 734 prec = 1; 735fp_begin: 736 if (prec < 0) 737 prec = DEFPREC; 738 if (dtoaresult) 739 __freedtoa(dtoaresult); 740 if (flags & LONGDBL) { 741 fparg.ldbl = GETARG(long double); 742 dtoaresult = cp = 743 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 744 &expt, &signflag, &dtoaend); 745 if (dtoaresult == NULL) { 746 errno = ENOMEM; 747 goto error; 748 } 749 } else { 750 fparg.dbl = GETARG(double); 751 dtoaresult = cp = 752 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 753 &expt, &signflag, &dtoaend); 754 if (dtoaresult == NULL) { 755 errno = ENOMEM; 756 goto error; 757 } 758 if (expt == 9999) 759 expt = INT_MAX; 760 } 761fp_common: 762 if (signflag) 763 sign = '-'; 764 if (expt == INT_MAX) { /* inf or nan */ 765 if (*cp == 'N') 766 cp = (ch >= 'a') ? "nan" : "NAN"; 767 else 768 cp = (ch >= 'a') ? "inf" : "INF"; 769 size = 3; 770 flags &= ~ZEROPAD; 771 break; 772 } 773 flags |= FPT; 774 ndig = dtoaend - cp; 775 if (ch == 'g' || ch == 'G') { 776 if (expt > -4 && expt <= prec) { 777 /* Make %[gG] smell like %[fF] */ 778 expchar = '\0'; 779 if (flags & ALT) 780 prec -= expt; 781 else 782 prec = ndig - expt; 783 if (prec < 0) 784 prec = 0; 785 } else { 786 /* 787 * Make %[gG] smell like %[eE], but 788 * trim trailing zeroes if no # flag. 789 */ 790 if (!(flags & ALT)) 791 prec = ndig; 792 } 793 } 794 if (expchar) { 795 expsize = exponent(expstr, expt - 1, expchar); 796 size = expsize + prec; 797 if (prec > 1 || flags & ALT) 798 ++size; 799 } else { 800 /* space for digits before decimal point */ 801 if (expt > 0) 802 size = expt; 803 else /* "0" */ 804 size = 1; 805 /* space for decimal pt and following digits */ 806 if (prec || flags & ALT) 807 size += prec + 1; 808 lead = expt; 809 } 810 break; 811#endif /* FLOATING_POINT */ 812#ifndef NO_PRINTF_PERCENT_N 813 case 'n': 814 if (flags & LLONGINT) 815 *GETARG(long long *) = ret; 816 else if (flags & LONGINT) 817 *GETARG(long *) = ret; 818 else if (flags & SHORTINT) 819 *GETARG(short *) = ret; 820 else if (flags & CHARINT) 821 *GETARG(signed char *) = ret; 822 else if (flags & PTRINT) 823 *GETARG(ptrdiff_t *) = ret; 824 else if (flags & SIZEINT) 825 *GETARG(ssize_t *) = ret; 826 else if (flags & MAXINT) 827 *GETARG(intmax_t *) = ret; 828 else 829 *GETARG(int *) = ret; 830 continue; /* no output */ 831#endif /* NO_PRINTF_PERCENT_N */ 832 case 'O': 833 flags |= LONGINT; 834 /*FALLTHROUGH*/ 835 case 'o': 836 _umax = UARG(); 837 base = OCT; 838 goto nosign; 839 case 'p': 840 /* 841 * ``The argument shall be a pointer to void. The 842 * value of the pointer is converted to a sequence 843 * of printable characters, in an implementation- 844 * defined manner.'' 845 * -- ANSI X3J11 846 */ 847 _umax = (u_long)GETARG(void *); 848 base = HEX; 849 xdigs = xdigs_lower; 850 ox[1] = 'x'; 851 goto nosign; 852 case 's': 853#ifdef PRINTF_WIDE_CHAR 854 if (flags & LONGINT) { 855 wchar_t *wcp; 856 857 free(convbuf); 858 convbuf = NULL; 859 if ((wcp = GETARG(wchar_t *)) == NULL) { 860 cp = "(null)"; 861 } else { 862 convbuf = __wcsconv(wcp, prec); 863 if (convbuf == NULL) { 864 ret = -1; 865 goto error; 866 } 867 cp = convbuf; 868 } 869 } else 870#endif /* PRINTF_WIDE_CHAR */ 871 if ((cp = GETARG(char *)) == NULL) 872 cp = "(null)"; 873 if (prec >= 0) { 874 /* 875 * can't use strlen; can only look for the 876 * NUL in the first `prec' characters, and 877 * strlen() will go further. 878 */ 879 char *p = memchr(cp, 0, prec); 880 881 size = p ? (p - cp) : prec; 882 } else { 883 size_t len; 884 885 if ((len = strlen(cp)) > INT_MAX) 886 goto overflow; 887 size = (int)len; 888 } 889 sign = '\0'; 890 break; 891 case 'U': 892 flags |= LONGINT; 893 /*FALLTHROUGH*/ 894 case 'u': 895 _umax = UARG(); 896 base = DEC; 897 goto nosign; 898 case 'X': 899 xdigs = xdigs_upper; 900 goto hex; 901 case 'x': 902 xdigs = xdigs_lower; 903hex: _umax = UARG(); 904 base = HEX; 905 /* leading 0x/X only if non-zero */ 906 if (flags & ALT && _umax != 0) 907 ox[1] = ch; 908 909 /* unsigned conversions */ 910nosign: sign = '\0'; 911 /* 912 * ``... diouXx conversions ... if a precision is 913 * specified, the 0 flag will be ignored.'' 914 * -- ANSI X3J11 915 */ 916number: if ((dprec = prec) >= 0) 917 flags &= ~ZEROPAD; 918 919 /* 920 * ``The result of converting a zero value with an 921 * explicit precision of zero is no characters.'' 922 * -- ANSI X3J11 923 */ 924 cp = buf + BUF; 925 if (_umax != 0 || prec != 0) { 926 /* 927 * Unsigned mod is hard, and unsigned mod 928 * by a constant is easier than that by 929 * a variable; hence this switch. 930 */ 931 switch (base) { 932 case OCT: 933 do { 934 *--cp = to_char(_umax & 7); 935 _umax >>= 3; 936 } while (_umax); 937 /* handle octal leading 0 */ 938 if (flags & ALT && *cp != '0') 939 *--cp = '0'; 940 break; 941 942 case DEC: 943 /* many numbers are 1 digit */ 944 while (_umax >= 10) { 945 *--cp = to_char(_umax % 10); 946 _umax /= 10; 947 } 948 *--cp = to_char(_umax); 949 break; 950 951 case HEX: 952 do { 953 *--cp = xdigs[_umax & 15]; 954 _umax >>= 4; 955 } while (_umax); 956 break; 957 958 default: 959 cp = "bug in vfprintf: bad base"; 960 size = strlen(cp); 961 goto skipsize; 962 } 963 } 964 size = buf + BUF - cp; 965 if (size > BUF) /* should never happen */ 966 abort(); 967 skipsize: 968 break; 969 default: /* "%?" prints ?, unless ? is NUL */ 970 if (ch == '\0') 971 goto done; 972 /* pretend it was %c with argument ch */ 973 cp = buf; 974 *cp = ch; 975 size = 1; 976 sign = '\0'; 977 break; 978 } 979 980 /* 981 * All reasonable formats wind up here. At this point, `cp' 982 * points to a string which (if not flags&LADJUST) should be 983 * padded out to `width' places. If flags&ZEROPAD, it should 984 * first be prefixed by any sign or other prefix; otherwise, 985 * it should be blank padded before the prefix is emitted. 986 * After any left-hand padding and prefixing, emit zeroes 987 * required by a decimal %[diouxX] precision, then print the 988 * string proper, then emit zeroes required by any leftover 989 * floating precision; finally, if LADJUST, pad with blanks. 990 * 991 * Compute actual size, so we know how much to pad. 992 * size excludes decimal prec; realsz includes it. 993 */ 994 realsz = dprec > size ? dprec : size; 995 if (sign) 996 realsz++; 997 if (ox[1]) 998 realsz+= 2; 999 1000 /* right-adjusting blank padding */ 1001 if ((flags & (LADJUST|ZEROPAD)) == 0) 1002 PAD(width - realsz, blanks); 1003 1004 /* prefix */ 1005 if (sign) 1006 PRINT(&sign, 1); 1007 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1008 ox[0] = '0'; 1009 PRINT(ox, 2); 1010 } 1011 1012 /* right-adjusting zero padding */ 1013 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1014 PAD(width - realsz, zeroes); 1015 1016 /* leading zeroes from decimal precision */ 1017 PAD(dprec - size, zeroes); 1018 1019 /* the string or number proper */ 1020#ifdef FLOATING_POINT 1021 if ((flags & FPT) == 0) { 1022 PRINT(cp, size); 1023 } else { /* glue together f_p fragments */ 1024 if (decimal_point == NULL) 1025 decimal_point = nl_langinfo(RADIXCHAR); 1026 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1027 if (expt <= 0) { 1028 PRINT(zeroes, 1); 1029 if (prec || flags & ALT) 1030 PRINT(decimal_point, 1); 1031 PAD(-expt, zeroes); 1032 /* already handled initial 0's */ 1033 prec += expt; 1034 } else { 1035 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1036 cp += lead; 1037 if (prec || flags & ALT) 1038 PRINT(decimal_point, 1); 1039 } 1040 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1041 } else { /* %[eE] or sufficiently long %[gG] */ 1042 if (prec > 1 || flags & ALT) { 1043 buf[0] = *cp++; 1044 buf[1] = *decimal_point; 1045 PRINT(buf, 2); 1046 PRINT(cp, ndig-1); 1047 PAD(prec - ndig, zeroes); 1048 } else { /* XeYYY */ 1049 PRINT(cp, 1); 1050 } 1051 PRINT(expstr, expsize); 1052 } 1053 } 1054#else 1055 PRINT(cp, size); 1056#endif 1057 /* left-adjusting padding (always blank) */ 1058 if (flags & LADJUST) 1059 PAD(width - realsz, blanks); 1060 1061 /* finally, adjust ret */ 1062 if (width < realsz) 1063 width = realsz; 1064 if (width > INT_MAX - ret) 1065 goto overflow; 1066 ret += width; 1067 1068 FLUSH(); /* copy out the I/O vectors */ 1069 } 1070done: 1071 FLUSH(); 1072error: 1073 va_end(orgap); 1074 if (__sferror(fp)) 1075 ret = -1; 1076 goto finish; 1077 1078overflow: 1079 errno = ENOMEM; 1080 ret = -1; 1081 1082finish: 1083#ifdef PRINTF_WIDE_CHAR 1084 free(convbuf); 1085#endif 1086#ifdef FLOATING_POINT 1087 if (dtoaresult) 1088 __freedtoa(dtoaresult); 1089#endif 1090 if (argtable != NULL && argtable != statargtable) { 1091 munmap(argtable, argtablesiz); 1092 argtable = NULL; 1093 } 1094 return (ret); 1095} 1096 1097/* 1098 * Type ids for argument type table. 1099 */ 1100#define T_UNUSED 0 1101#define T_SHORT 1 1102#define T_U_SHORT 2 1103#define TP_SHORT 3 1104#define T_INT 4 1105#define T_U_INT 5 1106#define TP_INT 6 1107#define T_LONG 7 1108#define T_U_LONG 8 1109#define TP_LONG 9 1110#define T_LLONG 10 1111#define T_U_LLONG 11 1112#define TP_LLONG 12 1113#define T_DOUBLE 13 1114#define T_LONG_DOUBLE 14 1115#define TP_CHAR 15 1116#define TP_VOID 16 1117#define T_PTRINT 17 1118#define TP_PTRINT 18 1119#define T_SIZEINT 19 1120#define T_SSIZEINT 20 1121#define TP_SSIZEINT 21 1122#define T_MAXINT 22 1123#define T_MAXUINT 23 1124#define TP_MAXINT 24 1125#define T_CHAR 25 1126#define T_U_CHAR 26 1127#define T_WINT 27 1128#define TP_WCHAR 28 1129 1130/* 1131 * Find all arguments when a positional parameter is encountered. Returns a 1132 * table, indexed by argument number, of pointers to each arguments. The 1133 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1134 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1135 * used since we are attempting to make snprintf thread safe, and alloca is 1136 * problematic since we have nested functions..) 1137 */ 1138static int 1139__find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1140 size_t *argtablesiz) 1141{ 1142 char *fmt; /* format string */ 1143 int ch; /* character from fmt */ 1144 int n, n2; /* handy integer (short term usage) */ 1145 char *cp; /* handy char pointer (short term usage) */ 1146 int flags; /* flags as above */ 1147 unsigned char *typetable; /* table of types */ 1148 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1149 int tablesize; /* current size of type table */ 1150 int tablemax; /* largest used index in table */ 1151 int nextarg; /* 1-based argument index */ 1152 int ret = 0; /* return value */ 1153 wchar_t wc; 1154 mbstate_t ps; 1155 1156 /* 1157 * Add an argument type to the table, expanding if necessary. 1158 */ 1159#define ADDTYPE(type) \ 1160 ((nextarg >= tablesize) ? \ 1161 __grow_type_table(&typetable, &tablesize) : 0, \ 1162 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1163 typetable[nextarg++] = type) 1164 1165#define ADDSARG() \ 1166 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1167 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1168 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1169 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1170 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1171 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1172 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1173 1174#define ADDUARG() \ 1175 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1176 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1177 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1178 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1179 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1180 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1181 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1182 1183 /* 1184 * Add * arguments to the type array. 1185 */ 1186#define ADDASTER() \ 1187 n2 = 0; \ 1188 cp = fmt; \ 1189 while (is_digit(*cp)) { \ 1190 APPEND_DIGIT(n2, *cp); \ 1191 cp++; \ 1192 } \ 1193 if (*cp == '$') { \ 1194 int hold = nextarg; \ 1195 nextarg = n2; \ 1196 ADDTYPE(T_INT); \ 1197 nextarg = hold; \ 1198 fmt = ++cp; \ 1199 } else { \ 1200 ADDTYPE(T_INT); \ 1201 } 1202 fmt = (char *)fmt0; 1203 typetable = stattypetable; 1204 tablesize = STATIC_ARG_TBL_SIZE; 1205 tablemax = 0; 1206 nextarg = 1; 1207 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1208 memset(&ps, 0, sizeof(ps)); 1209 1210 /* 1211 * Scan the format for conversions (`%' character). 1212 */ 1213 for (;;) { 1214 cp = fmt; 1215 while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) { 1216 fmt += n; 1217 if (wc == '%') { 1218 fmt--; 1219 break; 1220 } 1221 } 1222 if (n < 0) 1223 return (-1); 1224 if (n == 0) 1225 goto done; 1226 fmt++; /* skip over '%' */ 1227 1228 flags = 0; 1229 1230rflag: ch = *fmt++; 1231reswitch: switch (ch) { 1232 case ' ': 1233 case '#': 1234 case '\'': 1235 goto rflag; 1236 case '*': 1237 ADDASTER(); 1238 goto rflag; 1239 case '-': 1240 case '+': 1241 goto rflag; 1242 case '.': 1243 if ((ch = *fmt++) == '*') { 1244 ADDASTER(); 1245 goto rflag; 1246 } 1247 while (is_digit(ch)) { 1248 ch = *fmt++; 1249 } 1250 goto reswitch; 1251 case '0': 1252 goto rflag; 1253 case '1': case '2': case '3': case '4': 1254 case '5': case '6': case '7': case '8': case '9': 1255 n = 0; 1256 do { 1257 APPEND_DIGIT(n ,ch); 1258 ch = *fmt++; 1259 } while (is_digit(ch)); 1260 if (ch == '$') { 1261 nextarg = n; 1262 goto rflag; 1263 } 1264 goto reswitch; 1265#ifdef FLOATING_POINT 1266 case 'L': 1267 flags |= LONGDBL; 1268 goto rflag; 1269#endif 1270 case 'h': 1271 if (*fmt == 'h') { 1272 fmt++; 1273 flags |= CHARINT; 1274 } else { 1275 flags |= SHORTINT; 1276 } 1277 goto rflag; 1278 case 'j': 1279 flags |= MAXINT; 1280 goto rflag; 1281 case 'l': 1282 if (*fmt == 'l') { 1283 fmt++; 1284 flags |= LLONGINT; 1285 } else { 1286 flags |= LONGINT; 1287 } 1288 goto rflag; 1289 case 'q': 1290 flags |= LLONGINT; 1291 goto rflag; 1292 case 't': 1293 flags |= PTRINT; 1294 goto rflag; 1295 case 'z': 1296 flags |= SIZEINT; 1297 goto rflag; 1298 case 'c': 1299#ifdef PRINTF_WIDE_CHAR 1300 if (flags & LONGINT) 1301 ADDTYPE(T_WINT); 1302 else 1303#endif 1304 ADDTYPE(T_INT); 1305 break; 1306 case 'D': 1307 flags |= LONGINT; 1308 /*FALLTHROUGH*/ 1309 case 'd': 1310 case 'i': 1311 ADDSARG(); 1312 break; 1313#ifdef FLOATING_POINT 1314 case 'a': 1315 case 'A': 1316 case 'e': 1317 case 'E': 1318 case 'f': 1319 case 'F': 1320 case 'g': 1321 case 'G': 1322 if (flags & LONGDBL) 1323 ADDTYPE(T_LONG_DOUBLE); 1324 else 1325 ADDTYPE(T_DOUBLE); 1326 break; 1327#endif /* FLOATING_POINT */ 1328#ifndef NO_PRINTF_PERCENT_N 1329 case 'n': 1330 if (flags & LLONGINT) 1331 ADDTYPE(TP_LLONG); 1332 else if (flags & LONGINT) 1333 ADDTYPE(TP_LONG); 1334 else if (flags & SHORTINT) 1335 ADDTYPE(TP_SHORT); 1336 else if (flags & PTRINT) 1337 ADDTYPE(TP_PTRINT); 1338 else if (flags & SIZEINT) 1339 ADDTYPE(TP_SSIZEINT); 1340 else if (flags & MAXINT) 1341 ADDTYPE(TP_MAXINT); 1342 else 1343 ADDTYPE(TP_INT); 1344 continue; /* no output */ 1345#endif /* NO_PRINTF_PERCENT_N */ 1346 case 'O': 1347 flags |= LONGINT; 1348 /*FALLTHROUGH*/ 1349 case 'o': 1350 ADDUARG(); 1351 break; 1352 case 'p': 1353 ADDTYPE(TP_VOID); 1354 break; 1355 case 's': 1356#ifdef PRINTF_WIDE_CHAR 1357 if (flags & LONGINT) 1358 ADDTYPE(TP_WCHAR); 1359 else 1360#endif 1361 ADDTYPE(TP_CHAR); 1362 break; 1363 case 'U': 1364 flags |= LONGINT; 1365 /*FALLTHROUGH*/ 1366 case 'u': 1367 case 'X': 1368 case 'x': 1369 ADDUARG(); 1370 break; 1371 default: /* "%?" prints ?, unless ? is NUL */ 1372 if (ch == '\0') 1373 goto done; 1374 break; 1375 } 1376 } 1377done: 1378 /* 1379 * Build the argument table. 1380 */ 1381 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1382 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1383 *argtable = mmap(NULL, *argtablesiz, 1384 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1385 if (*argtable == MAP_FAILED) 1386 return (-1); 1387 } 1388 1389#if 0 1390 /* XXX is this required? */ 1391 (*argtable)[0].intarg = 0; 1392#endif 1393 for (n = 1; n <= tablemax; n++) { 1394 switch (typetable[n]) { 1395 case T_UNUSED: 1396 case T_CHAR: 1397 case T_U_CHAR: 1398 case T_SHORT: 1399 case T_U_SHORT: 1400 case T_INT: 1401 (*argtable)[n].intarg = va_arg(ap, int); 1402 break; 1403 case TP_SHORT: 1404 (*argtable)[n].pshortarg = va_arg(ap, short *); 1405 break; 1406 case T_U_INT: 1407 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1408 break; 1409 case TP_INT: 1410 (*argtable)[n].pintarg = va_arg(ap, int *); 1411 break; 1412 case T_LONG: 1413 (*argtable)[n].longarg = va_arg(ap, long); 1414 break; 1415 case T_U_LONG: 1416 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1417 break; 1418 case TP_LONG: 1419 (*argtable)[n].plongarg = va_arg(ap, long *); 1420 break; 1421 case T_LLONG: 1422 (*argtable)[n].longlongarg = va_arg(ap, long long); 1423 break; 1424 case T_U_LLONG: 1425 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1426 break; 1427 case TP_LLONG: 1428 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1429 break; 1430#ifdef FLOATING_POINT 1431 case T_DOUBLE: 1432 (*argtable)[n].doublearg = va_arg(ap, double); 1433 break; 1434 case T_LONG_DOUBLE: 1435 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1436 break; 1437#endif 1438 case TP_CHAR: 1439 (*argtable)[n].pchararg = va_arg(ap, char *); 1440 break; 1441 case TP_VOID: 1442 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1443 break; 1444 case T_PTRINT: 1445 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1446 break; 1447 case TP_PTRINT: 1448 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1449 break; 1450 case T_SIZEINT: 1451 (*argtable)[n].sizearg = va_arg(ap, size_t); 1452 break; 1453 case T_SSIZEINT: 1454 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1455 break; 1456 case TP_SSIZEINT: 1457 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1458 break; 1459 case T_MAXINT: 1460 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1461 break; 1462 case T_MAXUINT: 1463 (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t); 1464 break; 1465 case TP_MAXINT: 1466 (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t *); 1467 break; 1468#ifdef PRINTF_WIDE_CHAR 1469 case T_WINT: 1470 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1471 break; 1472 case TP_WCHAR: 1473 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1474 break; 1475#endif 1476 } 1477 } 1478 goto finish; 1479 1480overflow: 1481 errno = ENOMEM; 1482 ret = -1; 1483 1484finish: 1485 if (typetable != NULL && typetable != stattypetable) { 1486 munmap(typetable, *argtablesiz); 1487 typetable = NULL; 1488 } 1489 return (ret); 1490} 1491 1492/* 1493 * Increase the size of the type table. 1494 */ 1495static int 1496__grow_type_table(unsigned char **typetable, int *tablesize) 1497{ 1498 unsigned char *oldtable = *typetable; 1499 int newsize = *tablesize * 2; 1500 1501 if (newsize < getpagesize()) 1502 newsize = getpagesize(); 1503 1504 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1505 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1506 MAP_ANON|MAP_PRIVATE, -1, 0); 1507 if (*typetable == MAP_FAILED) 1508 return (-1); 1509 bcopy(oldtable, *typetable, *tablesize); 1510 } else { 1511 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1512 MAP_ANON|MAP_PRIVATE, -1, 0); 1513 if (new == MAP_FAILED) 1514 return (-1); 1515 memmove(new, *typetable, *tablesize); 1516 munmap(*typetable, *tablesize); 1517 *typetable = new; 1518 } 1519 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1520 1521 *tablesize = newsize; 1522 return (0); 1523} 1524 1525 1526#ifdef FLOATING_POINT 1527static int 1528exponent(char *p0, int exp, int fmtch) 1529{ 1530 char *p, *t; 1531 char expbuf[MAXEXPDIG]; 1532 1533 p = p0; 1534 *p++ = fmtch; 1535 if (exp < 0) { 1536 exp = -exp; 1537 *p++ = '-'; 1538 } else 1539 *p++ = '+'; 1540 t = expbuf + MAXEXPDIG; 1541 if (exp > 9) { 1542 do { 1543 *--t = to_char(exp % 10); 1544 } while ((exp /= 10) > 9); 1545 *--t = to_char(exp); 1546 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1547 /* nothing */; 1548 } else { 1549 /* 1550 * Exponents for decimal floating point conversions 1551 * (%[eEgG]) must be at least two characters long, 1552 * whereas exponents for hexadecimal conversions can 1553 * be only one character long. 1554 */ 1555 if (fmtch == 'e' || fmtch == 'E') 1556 *p++ = '0'; 1557 *p++ = to_char(exp); 1558 } 1559 return (p - p0); 1560} 1561#endif /* FLOATING_POINT */ 1562