1 /* $OpenBSD: vfprintf.c,v 1.80 2021/08/30 11:16:49 deraadt 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 <syslog.h> 54 #include <wchar.h> 55 56 #include "local.h" 57 #include "fvwrite.h" 58 59 union arg { 60 int intarg; 61 unsigned int uintarg; 62 long longarg; 63 unsigned long ulongarg; 64 long long longlongarg; 65 unsigned long long ulonglongarg; 66 ptrdiff_t ptrdiffarg; 67 size_t sizearg; 68 ssize_t ssizearg; 69 intmax_t intmaxarg; 70 uintmax_t uintmaxarg; 71 void *pvoidarg; 72 char *pchararg; 73 signed char *pschararg; 74 short *pshortarg; 75 int *pintarg; 76 long *plongarg; 77 long long *plonglongarg; 78 ptrdiff_t *pptrdiffarg; 79 ssize_t *pssizearg; 80 intmax_t *pintmaxarg; 81 #ifdef FLOATING_POINT 82 double doublearg; 83 long double longdoublearg; 84 #endif 85 #ifdef PRINTF_WIDE_CHAR 86 wint_t wintarg; 87 wchar_t *pwchararg; 88 #endif 89 }; 90 91 static int __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 92 size_t *argtablesiz); 93 static int __grow_type_table(unsigned char **typetable, int *tablesize); 94 95 /* 96 * Flush out all the vectors defined by the given uio, 97 * then reset it so that it can be reused. 98 */ 99 static int 100 __sprint(FILE *fp, struct __suio *uio) 101 { 102 int err; 103 104 if (uio->uio_resid == 0) { 105 uio->uio_iovcnt = 0; 106 return (0); 107 } 108 err = __sfvwrite(fp, uio); 109 uio->uio_resid = 0; 110 uio->uio_iovcnt = 0; 111 return (err); 112 } 113 114 /* 115 * Helper function for `fprintf to unbuffered unix file': creates a 116 * temporary buffer. We only work on write-only files; this avoids 117 * worries about ungetc buffers and so forth. 118 */ 119 static int 120 __sbprintf(FILE *fp, const char *fmt, va_list ap) 121 { 122 int ret; 123 FILE fake; 124 struct __sfileext fakeext; 125 unsigned char buf[BUFSIZ]; 126 127 _FILEEXT_SETUP(&fake, &fakeext); 128 /* copy the important variables */ 129 fake._flags = fp->_flags & ~__SNBF; 130 fake._file = fp->_file; 131 fake._cookie = fp->_cookie; 132 fake._write = fp->_write; 133 134 /* set up the buffer */ 135 fake._bf._base = fake._p = buf; 136 fake._bf._size = fake._w = sizeof(buf); 137 fake._lbfsize = 0; /* not actually used, but Just In Case */ 138 139 /* do the work, then copy any error status */ 140 ret = __vfprintf(&fake, fmt, ap); 141 if (ret >= 0 && __sflush(&fake)) 142 ret = EOF; 143 if (fake._flags & __SERR) 144 fp->_flags |= __SERR; 145 return (ret); 146 } 147 148 #ifdef PRINTF_WIDE_CHAR 149 /* 150 * Convert a wide character string argument for the %ls format to a multibyte 151 * string representation. If not -1, prec specifies the maximum number of 152 * bytes to output, and also means that we can't assume that the wide char 153 * string is null-terminated. 154 */ 155 static char * 156 __wcsconv(wchar_t *wcsarg, int prec) 157 { 158 mbstate_t mbs; 159 char buf[MB_LEN_MAX]; 160 wchar_t *p; 161 char *convbuf; 162 size_t clen, nbytes; 163 164 /* Allocate space for the maximum number of bytes we could output. */ 165 if (prec < 0) { 166 memset(&mbs, 0, sizeof(mbs)); 167 p = wcsarg; 168 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs); 169 if (nbytes == (size_t)-1) 170 return (NULL); 171 } else { 172 /* 173 * Optimisation: if the output precision is small enough, 174 * just allocate enough memory for the maximum instead of 175 * scanning the string. 176 */ 177 if (prec < 128) 178 nbytes = prec; 179 else { 180 nbytes = 0; 181 p = wcsarg; 182 memset(&mbs, 0, sizeof(mbs)); 183 for (;;) { 184 clen = wcrtomb(buf, *p++, &mbs); 185 if (clen == 0 || clen == (size_t)-1 || 186 nbytes + clen > (size_t)prec) 187 break; 188 nbytes += clen; 189 } 190 if (clen == (size_t)-1) 191 return (NULL); 192 } 193 } 194 if ((convbuf = malloc(nbytes + 1)) == NULL) 195 return (NULL); 196 197 /* Fill the output buffer. */ 198 p = wcsarg; 199 memset(&mbs, 0, sizeof(mbs)); 200 if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p, 201 nbytes, &mbs)) == (size_t)-1) { 202 free(convbuf); 203 return (NULL); 204 } 205 convbuf[nbytes] = '\0'; 206 return (convbuf); 207 } 208 #endif 209 210 #ifdef FLOATING_POINT 211 #include <float.h> 212 #include <locale.h> 213 #include <math.h> 214 #include "floatio.h" 215 #include "gdtoa.h" 216 217 #define DEFPREC 6 218 219 static int exponent(char *, int, int); 220 #endif /* FLOATING_POINT */ 221 222 /* 223 * The size of the buffer we use as scratch space for integer 224 * conversions, among other things. Technically, we would need the 225 * most space for base 10 conversions with thousands' grouping 226 * characters between each pair of digits. 100 bytes is a 227 * conservative overestimate even for a 128-bit uintmax_t. 228 */ 229 #define BUF 100 230 231 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 232 233 234 /* 235 * Macros for converting digits to letters and vice versa 236 */ 237 #define to_digit(c) ((c) - '0') 238 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 239 #define to_char(n) ((n) + '0') 240 241 /* 242 * Flags used during conversion. 243 */ 244 #define ALT 0x0001 /* alternate form */ 245 #define LADJUST 0x0004 /* left adjustment */ 246 #define LONGDBL 0x0008 /* long double */ 247 #define LONGINT 0x0010 /* long integer */ 248 #define LLONGINT 0x0020 /* long long integer */ 249 #define SHORTINT 0x0040 /* short integer */ 250 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ 251 #define FPT 0x0100 /* Floating point number */ 252 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ 253 #define SIZEINT 0x0400 /* (signed) size_t */ 254 #define CHARINT 0x0800 /* 8 bit integer */ 255 #define MAXINT 0x1000 /* largest integer size (intmax_t) */ 256 257 int 258 vfprintf(FILE *fp, const char *fmt0, __va_list ap) 259 { 260 int ret; 261 262 FLOCKFILE(fp); 263 ret = __vfprintf(fp, fmt0, ap); 264 FUNLOCKFILE(fp); 265 return (ret); 266 } 267 DEF_STRONG(vfprintf); 268 269 int 270 __vfprintf(FILE *fp, const char *fmt0, __va_list ap) 271 { 272 char *fmt; /* format string */ 273 int ch; /* character from fmt */ 274 int n, n2; /* handy integers (short term usage) */ 275 char *cp; /* handy char pointer (short term usage) */ 276 struct __siov *iovp; /* for PRINT macro */ 277 int flags; /* flags as above */ 278 int ret; /* return value accumulator */ 279 int width; /* width from format (%8d), or 0 */ 280 int prec; /* precision from format; <0 for N/A */ 281 char sign; /* sign prefix (' ', '+', '-', or \0) */ 282 #ifdef FLOATING_POINT 283 /* 284 * We can decompose the printed representation of floating 285 * point numbers into several parts, some of which may be empty: 286 * 287 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 288 * A B ---C--- D E F 289 * 290 * A: 'sign' holds this value if present; '\0' otherwise 291 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 292 * C: cp points to the string MMMNNN. Leading and trailing 293 * zeros are not in the string and must be added. 294 * D: expchar holds this character; '\0' if no exponent, e.g. %f 295 * F: at least two digits for decimal, at least one digit for hex 296 */ 297 char *decimal_point = NULL; 298 int signflag; /* true if float is negative */ 299 union { /* floating point arguments %[aAeEfFgG] */ 300 double dbl; 301 long double ldbl; 302 } fparg; 303 int expt; /* integer value of exponent */ 304 char expchar; /* exponent character: [eEpP\0] */ 305 char *dtoaend; /* pointer to end of converted digits */ 306 int expsize; /* character count for expstr */ 307 int lead; /* sig figs before decimal or group sep */ 308 int ndig; /* actual number of digits returned by dtoa */ 309 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 310 char *dtoaresult = NULL; 311 #endif 312 313 uintmax_t _umax; /* integer arguments %[diouxX] */ 314 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 315 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 316 int realsz; /* field size expanded by dprec */ 317 int size; /* size of converted field or string */ 318 const char *xdigs; /* digits for %[xX] conversion */ 319 #define NIOV 8 320 struct __suio uio; /* output information: summary */ 321 struct __siov iov[NIOV];/* ... and individual io vectors */ 322 char buf[BUF]; /* buffer with space for digits of uintmax_t */ 323 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 324 union arg *argtable; /* args, built due to positional arg */ 325 union arg statargtable[STATIC_ARG_TBL_SIZE]; 326 size_t argtablesiz; 327 int nextarg; /* 1-based argument index */ 328 va_list orgap; /* original argument pointer */ 329 #ifdef PRINTF_WIDE_CHAR 330 char *convbuf; /* buffer for wide to multi-byte conversion */ 331 #endif 332 333 /* 334 * Choose PADSIZE to trade efficiency vs. size. If larger printf 335 * fields occur frequently, increase PADSIZE and make the initialisers 336 * below longer. 337 */ 338 #define PADSIZE 16 /* pad chunk size */ 339 static char blanks[PADSIZE] = 340 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 341 static char zeroes[PADSIZE] = 342 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 343 344 static const char xdigs_lower[16] = "0123456789abcdef"; 345 static const char xdigs_upper[16] = "0123456789ABCDEF"; 346 347 /* 348 * BEWARE, these `goto error' on error, and PAD uses `n'. 349 */ 350 #define PRINT(ptr, len) do { \ 351 iovp->iov_base = (ptr); \ 352 iovp->iov_len = (len); \ 353 uio.uio_resid += (len); \ 354 iovp++; \ 355 if (++uio.uio_iovcnt >= NIOV) { \ 356 if (__sprint(fp, &uio)) \ 357 goto error; \ 358 iovp = iov; \ 359 } \ 360 } while (0) 361 #define PAD(howmany, with) do { \ 362 if ((n = (howmany)) > 0) { \ 363 while (n > PADSIZE) { \ 364 PRINT(with, PADSIZE); \ 365 n -= PADSIZE; \ 366 } \ 367 PRINT(with, n); \ 368 } \ 369 } while (0) 370 #define PRINTANDPAD(p, ep, len, with) do { \ 371 n2 = (ep) - (p); \ 372 if (n2 > (len)) \ 373 n2 = (len); \ 374 if (n2 > 0) \ 375 PRINT((p), n2); \ 376 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 377 } while(0) 378 #define FLUSH() do { \ 379 if (uio.uio_resid && __sprint(fp, &uio)) \ 380 goto error; \ 381 uio.uio_iovcnt = 0; \ 382 iovp = iov; \ 383 } while (0) 384 385 /* 386 * To extend shorts properly, we need both signed and unsigned 387 * argument extraction methods. 388 */ 389 #define SARG() \ 390 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 391 flags&LLONGINT ? GETARG(long long) : \ 392 flags&LONGINT ? GETARG(long) : \ 393 flags&PTRINT ? GETARG(ptrdiff_t) : \ 394 flags&SIZEINT ? GETARG(ssize_t) : \ 395 flags&SHORTINT ? (short)GETARG(int) : \ 396 flags&CHARINT ? (signed char)GETARG(int) : \ 397 GETARG(int))) 398 #define UARG() \ 399 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 400 flags&LLONGINT ? GETARG(unsigned long long) : \ 401 flags&LONGINT ? GETARG(unsigned long) : \ 402 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 403 flags&SIZEINT ? GETARG(size_t) : \ 404 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 405 flags&CHARINT ? (unsigned char)GETARG(int) : \ 406 GETARG(unsigned int))) 407 408 /* 409 * Append a digit to a value and check for overflow. 410 */ 411 #define APPEND_DIGIT(val, dig) do { \ 412 if ((val) > INT_MAX / 10) \ 413 goto overflow; \ 414 (val) *= 10; \ 415 if ((val) > INT_MAX - to_digit((dig))) \ 416 goto overflow; \ 417 (val) += to_digit((dig)); \ 418 } while (0) 419 420 /* 421 * Get * arguments, including the form *nn$. Preserve the nextarg 422 * that the argument can be gotten once the type is determined. 423 */ 424 #define GETASTER(val) \ 425 n2 = 0; \ 426 cp = fmt; \ 427 while (is_digit(*cp)) { \ 428 APPEND_DIGIT(n2, *cp); \ 429 cp++; \ 430 } \ 431 if (*cp == '$') { \ 432 int hold = nextarg; \ 433 if (argtable == NULL) { \ 434 argtable = statargtable; \ 435 if (__find_arguments(fmt0, orgap, &argtable, \ 436 &argtablesiz) == -1) { \ 437 ret = -1; \ 438 goto error; \ 439 } \ 440 } \ 441 nextarg = n2; \ 442 val = GETARG(int); \ 443 nextarg = hold; \ 444 fmt = ++cp; \ 445 } else { \ 446 val = GETARG(int); \ 447 } 448 449 /* 450 * Get the argument indexed by nextarg. If the argument table is 451 * built, use it to get the argument. If its not, get the next 452 * argument (and arguments must be gotten sequentially). 453 */ 454 #define GETARG(type) \ 455 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 456 (nextarg++, va_arg(ap, type))) 457 458 _SET_ORIENTATION(fp, -1); 459 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ 460 if (cantwrite(fp)) { 461 errno = EBADF; 462 return (EOF); 463 } 464 465 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 466 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 467 fp->_file >= 0) 468 return (__sbprintf(fp, fmt0, ap)); 469 470 fmt = (char *)fmt0; 471 argtable = NULL; 472 nextarg = 1; 473 va_copy(orgap, ap); 474 uio.uio_iov = iovp = iov; 475 uio.uio_resid = 0; 476 uio.uio_iovcnt = 0; 477 ret = 0; 478 #ifdef PRINTF_WIDE_CHAR 479 convbuf = NULL; 480 #endif 481 482 /* 483 * Scan the format for conversions (`%' character). 484 */ 485 for (;;) { 486 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 487 continue; 488 489 if (fmt != cp) { 490 ptrdiff_t m = fmt - cp; 491 if (m < 0 || m > INT_MAX - ret) 492 goto overflow; 493 PRINT(cp, m); 494 ret += m; 495 } 496 if (ch == '\0') 497 goto done; 498 fmt++; /* skip over '%' */ 499 500 flags = 0; 501 dprec = 0; 502 width = 0; 503 prec = -1; 504 sign = '\0'; 505 ox[1] = '\0'; 506 507 rflag: ch = *fmt++; 508 reswitch: switch (ch) { 509 case ' ': 510 /* 511 * ``If the space and + flags both appear, the space 512 * flag will be ignored.'' 513 * -- ANSI X3J11 514 */ 515 if (!sign) 516 sign = ' '; 517 goto rflag; 518 case '#': 519 flags |= ALT; 520 goto rflag; 521 case '\'': 522 /* grouping not implemented */ 523 goto rflag; 524 case '*': 525 /* 526 * ``A negative field width argument is taken as a 527 * - flag followed by a positive field width.'' 528 * -- ANSI X3J11 529 * They don't exclude field widths read from args. 530 */ 531 GETASTER(width); 532 if (width >= 0) 533 goto rflag; 534 if (width == INT_MIN) 535 goto overflow; 536 width = -width; 537 /* FALLTHROUGH */ 538 case '-': 539 flags |= LADJUST; 540 goto rflag; 541 case '+': 542 sign = '+'; 543 goto rflag; 544 case '.': 545 if ((ch = *fmt++) == '*') { 546 GETASTER(n); 547 prec = n < 0 ? -1 : n; 548 goto rflag; 549 } 550 n = 0; 551 while (is_digit(ch)) { 552 APPEND_DIGIT(n, ch); 553 ch = *fmt++; 554 } 555 if (ch == '$') { 556 nextarg = n; 557 if (argtable == NULL) { 558 argtable = statargtable; 559 if (__find_arguments(fmt0, orgap, 560 &argtable, &argtablesiz) == -1) { 561 ret = -1; 562 goto error; 563 } 564 } 565 goto rflag; 566 } 567 prec = n; 568 goto reswitch; 569 case '0': 570 /* 571 * ``Note that 0 is taken as a flag, not as the 572 * beginning of a field width.'' 573 * -- ANSI X3J11 574 */ 575 flags |= ZEROPAD; 576 goto rflag; 577 case '1': case '2': case '3': case '4': 578 case '5': case '6': case '7': case '8': case '9': 579 n = 0; 580 do { 581 APPEND_DIGIT(n, ch); 582 ch = *fmt++; 583 } while (is_digit(ch)); 584 if (ch == '$') { 585 nextarg = n; 586 if (argtable == NULL) { 587 argtable = statargtable; 588 if (__find_arguments(fmt0, orgap, 589 &argtable, &argtablesiz) == -1) { 590 ret = -1; 591 goto error; 592 } 593 } 594 goto rflag; 595 } 596 width = n; 597 goto reswitch; 598 #ifdef FLOATING_POINT 599 case 'L': 600 flags |= LONGDBL; 601 goto rflag; 602 #endif 603 case 'h': 604 if (*fmt == 'h') { 605 fmt++; 606 flags |= CHARINT; 607 } else { 608 flags |= SHORTINT; 609 } 610 goto rflag; 611 case 'j': 612 flags |= MAXINT; 613 goto rflag; 614 case 'l': 615 if (*fmt == 'l') { 616 fmt++; 617 flags |= LLONGINT; 618 } else { 619 flags |= LONGINT; 620 } 621 goto rflag; 622 case 'q': 623 flags |= LLONGINT; 624 goto rflag; 625 case 't': 626 flags |= PTRINT; 627 goto rflag; 628 case 'z': 629 flags |= SIZEINT; 630 goto rflag; 631 case 'c': 632 #ifdef PRINTF_WIDE_CHAR 633 if (flags & LONGINT) { 634 mbstate_t mbs; 635 size_t mbseqlen; 636 637 memset(&mbs, 0, sizeof(mbs)); 638 mbseqlen = wcrtomb(buf, 639 (wchar_t)GETARG(wint_t), &mbs); 640 if (mbseqlen == (size_t)-1) { 641 ret = -1; 642 goto error; 643 } 644 cp = buf; 645 size = (int)mbseqlen; 646 } else { 647 #endif 648 *(cp = buf) = GETARG(int); 649 size = 1; 650 #ifdef PRINTF_WIDE_CHAR 651 } 652 #endif 653 sign = '\0'; 654 break; 655 case 'D': 656 flags |= LONGINT; 657 /*FALLTHROUGH*/ 658 case 'd': 659 case 'i': 660 _umax = SARG(); 661 if ((intmax_t)_umax < 0) { 662 _umax = -_umax; 663 sign = '-'; 664 } 665 base = DEC; 666 goto number; 667 #ifdef FLOATING_POINT 668 case 'a': 669 case 'A': 670 if (ch == 'a') { 671 ox[1] = 'x'; 672 xdigs = xdigs_lower; 673 expchar = 'p'; 674 } else { 675 ox[1] = 'X'; 676 xdigs = xdigs_upper; 677 expchar = 'P'; 678 } 679 if (prec >= 0) 680 prec++; 681 if (dtoaresult) 682 __freedtoa(dtoaresult); 683 if (flags & LONGDBL) { 684 fparg.ldbl = GETARG(long double); 685 dtoaresult = cp = 686 __hldtoa(fparg.ldbl, xdigs, prec, 687 &expt, &signflag, &dtoaend); 688 if (dtoaresult == NULL) { 689 errno = ENOMEM; 690 goto error; 691 } 692 } else { 693 fparg.dbl = GETARG(double); 694 dtoaresult = cp = 695 __hdtoa(fparg.dbl, xdigs, prec, 696 &expt, &signflag, &dtoaend); 697 if (dtoaresult == NULL) { 698 errno = ENOMEM; 699 goto error; 700 } 701 } 702 if (prec < 0) 703 prec = dtoaend - cp; 704 if (expt == INT_MAX) 705 ox[1] = '\0'; 706 goto fp_common; 707 case 'e': 708 case 'E': 709 expchar = ch; 710 if (prec < 0) /* account for digit before decpt */ 711 prec = DEFPREC + 1; 712 else 713 prec++; 714 goto fp_begin; 715 case 'f': 716 case 'F': 717 expchar = '\0'; 718 goto fp_begin; 719 case 'g': 720 case 'G': 721 expchar = ch - ('g' - 'e'); 722 if (prec == 0) 723 prec = 1; 724 fp_begin: 725 if (prec < 0) 726 prec = DEFPREC; 727 if (dtoaresult) 728 __freedtoa(dtoaresult); 729 if (flags & LONGDBL) { 730 fparg.ldbl = GETARG(long double); 731 dtoaresult = cp = 732 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 733 &expt, &signflag, &dtoaend); 734 if (dtoaresult == NULL) { 735 errno = ENOMEM; 736 goto error; 737 } 738 } else { 739 fparg.dbl = GETARG(double); 740 dtoaresult = cp = 741 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 742 &expt, &signflag, &dtoaend); 743 if (dtoaresult == NULL) { 744 errno = ENOMEM; 745 goto error; 746 } 747 if (expt == 9999) 748 expt = INT_MAX; 749 } 750 fp_common: 751 if (signflag) 752 sign = '-'; 753 if (expt == INT_MAX) { /* inf or nan */ 754 if (*cp == 'N') 755 cp = (ch >= 'a') ? "nan" : "NAN"; 756 else 757 cp = (ch >= 'a') ? "inf" : "INF"; 758 size = 3; 759 flags &= ~ZEROPAD; 760 break; 761 } 762 flags |= FPT; 763 ndig = dtoaend - cp; 764 if (ch == 'g' || ch == 'G') { 765 if (expt > -4 && expt <= prec) { 766 /* Make %[gG] smell like %[fF] */ 767 expchar = '\0'; 768 if (flags & ALT) 769 prec -= expt; 770 else 771 prec = ndig - expt; 772 if (prec < 0) 773 prec = 0; 774 } else { 775 /* 776 * Make %[gG] smell like %[eE], but 777 * trim trailing zeroes if no # flag. 778 */ 779 if (!(flags & ALT)) 780 prec = ndig; 781 } 782 } 783 if (expchar) { 784 expsize = exponent(expstr, expt - 1, expchar); 785 size = expsize + prec; 786 if (prec > 1 || flags & ALT) 787 ++size; 788 } else { 789 /* space for digits before decimal point */ 790 if (expt > 0) 791 size = expt; 792 else /* "0" */ 793 size = 1; 794 /* space for decimal pt and following digits */ 795 if (prec || flags & ALT) 796 size += prec + 1; 797 lead = expt; 798 } 799 break; 800 #endif /* FLOATING_POINT */ 801 case 'n': { 802 static const char n_msg[] = ": *printf used %n, aborting: "; 803 char buf[1024], *p; 804 805 /* <10> is LOG_CRIT */ 806 strlcpy(buf, "<10>", sizeof buf); 807 808 /* XXX */ 809 if ((p = getenv("_THIS_PORT")) != NULL) { 810 strlcat(buf, p, sizeof buf); 811 strlcat(buf, " ", sizeof buf); 812 } 813 814 /* Make sure progname does not fill the whole buffer */ 815 strlcat(buf, __progname, sizeof(buf) - sizeof n_msg); 816 strlcat(buf, n_msg, sizeof buf); 817 strlcat(buf, fmt0, sizeof buf); 818 if ((p = strchr(buf, '\n'))) 819 *p = '\0'; 820 sendsyslog(buf, strlen(buf), LOG_CONS); 821 abort(); 822 break; 823 } 824 case 'O': 825 flags |= LONGINT; 826 /*FALLTHROUGH*/ 827 case 'o': 828 _umax = UARG(); 829 base = OCT; 830 goto nosign; 831 case 'p': 832 /* 833 * ``The argument shall be a pointer to void. The 834 * value of the pointer is converted to a sequence 835 * of printable characters, in an implementation- 836 * defined manner.'' 837 * -- ANSI X3J11 838 */ 839 _umax = (u_long)GETARG(void *); 840 base = HEX; 841 xdigs = xdigs_lower; 842 ox[1] = 'x'; 843 goto nosign; 844 case 's': { 845 size_t len; 846 847 #ifdef PRINTF_WIDE_CHAR 848 if (flags & LONGINT) { 849 wchar_t *wcp; 850 851 free(convbuf); 852 convbuf = NULL; 853 if ((wcp = GETARG(wchar_t *)) == NULL) { 854 struct syslog_data sdata = SYSLOG_DATA_INIT; 855 int save_errno = errno; 856 857 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 858 "vfprintf %%ls NULL in \"%s\"", fmt0); 859 errno = save_errno; 860 861 cp = "(null)"; 862 } else { 863 convbuf = __wcsconv(wcp, prec); 864 if (convbuf == NULL) { 865 ret = -1; 866 goto error; 867 } 868 cp = convbuf; 869 } 870 } else 871 #endif /* PRINTF_WIDE_CHAR */ 872 873 if ((cp = GETARG(char *)) == NULL) { 874 struct syslog_data sdata = SYSLOG_DATA_INIT; 875 int save_errno = errno; 876 877 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 878 "vfprintf %%s NULL in \"%s\"", fmt0); 879 errno = save_errno; 880 881 cp = "(null)"; 882 } 883 len = prec >= 0 ? strnlen(cp, prec) : strlen(cp); 884 if (len > INT_MAX) 885 goto overflow; 886 size = (int)len; 887 sign = '\0'; 888 } 889 break; 890 case 'U': 891 flags |= LONGINT; 892 /*FALLTHROUGH*/ 893 case 'u': 894 _umax = UARG(); 895 base = DEC; 896 goto nosign; 897 case 'X': 898 xdigs = xdigs_upper; 899 goto hex; 900 case 'x': 901 xdigs = xdigs_lower; 902 hex: _umax = UARG(); 903 base = HEX; 904 /* leading 0x/X only if non-zero */ 905 if (flags & ALT && _umax != 0) 906 ox[1] = ch; 907 908 /* unsigned conversions */ 909 nosign: sign = '\0'; 910 /* 911 * ``... diouXx conversions ... if a precision is 912 * specified, the 0 flag will be ignored.'' 913 * -- ANSI X3J11 914 */ 915 number: if ((dprec = prec) >= 0) 916 flags &= ~ZEROPAD; 917 918 /* 919 * ``The result of converting a zero value with an 920 * explicit precision of zero is no characters.'' 921 * -- ANSI X3J11 922 */ 923 cp = buf + BUF; 924 if (_umax != 0 || prec != 0) { 925 /* 926 * Unsigned mod is hard, and unsigned mod 927 * by a constant is easier than that by 928 * a variable; hence this switch. 929 */ 930 switch (base) { 931 case OCT: 932 do { 933 *--cp = to_char(_umax & 7); 934 _umax >>= 3; 935 } while (_umax); 936 /* handle octal leading 0 */ 937 if (flags & ALT && *cp != '0') 938 *--cp = '0'; 939 break; 940 941 case DEC: 942 /* many numbers are 1 digit */ 943 while (_umax >= 10) { 944 *--cp = to_char(_umax % 10); 945 _umax /= 10; 946 } 947 *--cp = to_char(_umax); 948 break; 949 950 case HEX: 951 do { 952 *--cp = xdigs[_umax & 15]; 953 _umax >>= 4; 954 } while (_umax); 955 break; 956 957 default: 958 cp = "bug in vfprintf: bad base"; 959 size = strlen(cp); 960 goto skipsize; 961 } 962 } 963 size = buf + BUF - cp; 964 if (size > BUF) /* should never happen */ 965 abort(); 966 skipsize: 967 break; 968 default: /* "%?" prints ?, unless ? is NUL */ 969 if (ch == '\0') 970 goto done; 971 /* pretend it was %c with argument ch */ 972 cp = buf; 973 *cp = ch; 974 size = 1; 975 sign = '\0'; 976 break; 977 } 978 979 /* 980 * All reasonable formats wind up here. At this point, `cp' 981 * points to a string which (if not flags&LADJUST) should be 982 * padded out to `width' places. If flags&ZEROPAD, it should 983 * first be prefixed by any sign or other prefix; otherwise, 984 * it should be blank padded before the prefix is emitted. 985 * After any left-hand padding and prefixing, emit zeroes 986 * required by a decimal %[diouxX] precision, then print the 987 * string proper, then emit zeroes required by any leftover 988 * floating precision; finally, if LADJUST, pad with blanks. 989 * 990 * Compute actual size, so we know how much to pad. 991 * size excludes decimal prec; realsz includes it. 992 */ 993 realsz = dprec > size ? dprec : size; 994 if (sign) 995 realsz++; 996 if (ox[1]) 997 realsz+= 2; 998 999 /* right-adjusting blank padding */ 1000 if ((flags & (LADJUST|ZEROPAD)) == 0) 1001 PAD(width - realsz, blanks); 1002 1003 /* prefix */ 1004 if (sign) 1005 PRINT(&sign, 1); 1006 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1007 ox[0] = '0'; 1008 PRINT(ox, 2); 1009 } 1010 1011 /* right-adjusting zero padding */ 1012 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1013 PAD(width - realsz, zeroes); 1014 1015 /* leading zeroes from decimal precision */ 1016 PAD(dprec - size, zeroes); 1017 1018 /* the string or number proper */ 1019 #ifdef FLOATING_POINT 1020 if ((flags & FPT) == 0) { 1021 PRINT(cp, size); 1022 } else { /* glue together f_p fragments */ 1023 if (decimal_point == NULL) 1024 decimal_point = nl_langinfo(RADIXCHAR); 1025 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1026 if (expt <= 0) { 1027 PRINT(zeroes, 1); 1028 if (prec || flags & ALT) 1029 PRINT(decimal_point, 1); 1030 PAD(-expt, zeroes); 1031 /* already handled initial 0's */ 1032 prec += expt; 1033 } else { 1034 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1035 cp += lead; 1036 if (prec || flags & ALT) 1037 PRINT(decimal_point, 1); 1038 } 1039 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1040 } else { /* %[eE] or sufficiently long %[gG] */ 1041 if (prec > 1 || flags & ALT) { 1042 buf[0] = *cp++; 1043 buf[1] = *decimal_point; 1044 PRINT(buf, 2); 1045 PRINT(cp, ndig-1); 1046 PAD(prec - ndig, zeroes); 1047 } else { /* XeYYY */ 1048 PRINT(cp, 1); 1049 } 1050 PRINT(expstr, expsize); 1051 } 1052 } 1053 #else 1054 PRINT(cp, size); 1055 #endif 1056 /* left-adjusting padding (always blank) */ 1057 if (flags & LADJUST) 1058 PAD(width - realsz, blanks); 1059 1060 /* finally, adjust ret */ 1061 if (width < realsz) 1062 width = realsz; 1063 if (width > INT_MAX - ret) 1064 goto overflow; 1065 ret += width; 1066 1067 FLUSH(); /* copy out the I/O vectors */ 1068 } 1069 done: 1070 FLUSH(); 1071 error: 1072 va_end(orgap); 1073 if (__sferror(fp)) 1074 ret = -1; 1075 goto finish; 1076 1077 overflow: 1078 errno = EOVERFLOW; 1079 ret = -1; 1080 1081 finish: 1082 #ifdef PRINTF_WIDE_CHAR 1083 free(convbuf); 1084 #endif 1085 #ifdef FLOATING_POINT 1086 if (dtoaresult) 1087 __freedtoa(dtoaresult); 1088 #endif 1089 if (argtable != NULL && argtable != statargtable) { 1090 munmap(argtable, argtablesiz); 1091 argtable = NULL; 1092 } 1093 return (ret); 1094 } 1095 1096 /* 1097 * Type ids for argument type table. 1098 */ 1099 #define T_UNUSED 0 1100 #define T_SHORT 1 1101 #define T_U_SHORT 2 1102 #define TP_SHORT 3 1103 #define T_INT 4 1104 #define T_U_INT 5 1105 #define TP_INT 6 1106 #define T_LONG 7 1107 #define T_U_LONG 8 1108 #define TP_LONG 9 1109 #define T_LLONG 10 1110 #define T_U_LLONG 11 1111 #define TP_LLONG 12 1112 #define T_DOUBLE 13 1113 #define T_LONG_DOUBLE 14 1114 #define TP_CHAR 15 1115 #define TP_VOID 16 1116 #define T_PTRINT 17 1117 #define TP_PTRINT 18 1118 #define T_SIZEINT 19 1119 #define T_SSIZEINT 20 1120 #define TP_SSIZEINT 21 1121 #define T_MAXINT 22 1122 #define T_MAXUINT 23 1123 #define TP_MAXINT 24 1124 #define T_CHAR 25 1125 #define T_U_CHAR 26 1126 #define T_WINT 27 1127 #define TP_WCHAR 28 1128 1129 /* 1130 * Find all arguments when a positional parameter is encountered. Returns a 1131 * table, indexed by argument number, of pointers to each arguments. The 1132 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1133 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1134 * used since we are attempting to make snprintf thread safe, and alloca is 1135 * problematic since we have nested functions..) 1136 */ 1137 static int 1138 __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1139 size_t *argtablesiz) 1140 { 1141 char *fmt; /* format string */ 1142 int ch; /* character from fmt */ 1143 int n, n2; /* handy integer (short term usage) */ 1144 char *cp; /* handy char pointer (short term usage) */ 1145 int flags; /* flags as above */ 1146 unsigned char *typetable; /* table of types */ 1147 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1148 int tablesize; /* current size of type table */ 1149 int tablemax; /* largest used index in table */ 1150 int nextarg; /* 1-based argument index */ 1151 int ret = 0; /* return value */ 1152 1153 /* 1154 * Add an argument type to the table, expanding if necessary. 1155 */ 1156 #define ADDTYPE(type) \ 1157 ((nextarg >= tablesize) ? \ 1158 __grow_type_table(&typetable, &tablesize) : 0, \ 1159 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1160 typetable[nextarg++] = type) 1161 1162 #define ADDSARG() \ 1163 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1164 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1165 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1166 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1167 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1168 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1169 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1170 1171 #define ADDUARG() \ 1172 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1173 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1174 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1175 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1176 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1177 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1178 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1179 1180 /* 1181 * Add * arguments to the type array. 1182 */ 1183 #define ADDASTER() \ 1184 n2 = 0; \ 1185 cp = fmt; \ 1186 while (is_digit(*cp)) { \ 1187 APPEND_DIGIT(n2, *cp); \ 1188 cp++; \ 1189 } \ 1190 if (*cp == '$') { \ 1191 int hold = nextarg; \ 1192 nextarg = n2; \ 1193 ADDTYPE(T_INT); \ 1194 nextarg = hold; \ 1195 fmt = ++cp; \ 1196 } else { \ 1197 ADDTYPE(T_INT); \ 1198 } 1199 fmt = (char *)fmt0; 1200 typetable = stattypetable; 1201 tablesize = STATIC_ARG_TBL_SIZE; 1202 tablemax = 0; 1203 nextarg = 1; 1204 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1205 1206 /* 1207 * Scan the format for conversions (`%' character). 1208 */ 1209 for (;;) { 1210 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1211 continue; 1212 if (ch == '\0') 1213 goto done; 1214 fmt++; /* skip over '%' */ 1215 1216 flags = 0; 1217 1218 rflag: ch = *fmt++; 1219 reswitch: switch (ch) { 1220 case ' ': 1221 case '#': 1222 case '\'': 1223 goto rflag; 1224 case '*': 1225 ADDASTER(); 1226 goto rflag; 1227 case '-': 1228 case '+': 1229 goto rflag; 1230 case '.': 1231 if ((ch = *fmt++) == '*') { 1232 ADDASTER(); 1233 goto rflag; 1234 } 1235 while (is_digit(ch)) { 1236 ch = *fmt++; 1237 } 1238 goto reswitch; 1239 case '0': 1240 goto rflag; 1241 case '1': case '2': case '3': case '4': 1242 case '5': case '6': case '7': case '8': case '9': 1243 n = 0; 1244 do { 1245 APPEND_DIGIT(n ,ch); 1246 ch = *fmt++; 1247 } while (is_digit(ch)); 1248 if (ch == '$') { 1249 nextarg = n; 1250 goto rflag; 1251 } 1252 goto reswitch; 1253 #ifdef FLOATING_POINT 1254 case 'L': 1255 flags |= LONGDBL; 1256 goto rflag; 1257 #endif 1258 case 'h': 1259 if (*fmt == 'h') { 1260 fmt++; 1261 flags |= CHARINT; 1262 } else { 1263 flags |= SHORTINT; 1264 } 1265 goto rflag; 1266 case 'j': 1267 flags |= MAXINT; 1268 goto rflag; 1269 case 'l': 1270 if (*fmt == 'l') { 1271 fmt++; 1272 flags |= LLONGINT; 1273 } else { 1274 flags |= LONGINT; 1275 } 1276 goto rflag; 1277 case 'q': 1278 flags |= LLONGINT; 1279 goto rflag; 1280 case 't': 1281 flags |= PTRINT; 1282 goto rflag; 1283 case 'z': 1284 flags |= SIZEINT; 1285 goto rflag; 1286 case 'c': 1287 #ifdef PRINTF_WIDE_CHAR 1288 if (flags & LONGINT) 1289 ADDTYPE(T_WINT); 1290 else 1291 #endif 1292 ADDTYPE(T_INT); 1293 break; 1294 case 'D': 1295 flags |= LONGINT; 1296 /*FALLTHROUGH*/ 1297 case 'd': 1298 case 'i': 1299 ADDSARG(); 1300 break; 1301 #ifdef FLOATING_POINT 1302 case 'a': 1303 case 'A': 1304 case 'e': 1305 case 'E': 1306 case 'f': 1307 case 'F': 1308 case 'g': 1309 case 'G': 1310 if (flags & LONGDBL) 1311 ADDTYPE(T_LONG_DOUBLE); 1312 else 1313 ADDTYPE(T_DOUBLE); 1314 break; 1315 #endif /* FLOATING_POINT */ 1316 case 'n': 1317 if (flags & LLONGINT) 1318 ADDTYPE(TP_LLONG); 1319 else if (flags & LONGINT) 1320 ADDTYPE(TP_LONG); 1321 else if (flags & SHORTINT) 1322 ADDTYPE(TP_SHORT); 1323 else if (flags & PTRINT) 1324 ADDTYPE(TP_PTRINT); 1325 else if (flags & SIZEINT) 1326 ADDTYPE(TP_SSIZEINT); 1327 else if (flags & MAXINT) 1328 ADDTYPE(TP_MAXINT); 1329 else 1330 ADDTYPE(TP_INT); 1331 continue; /* no output */ 1332 case 'O': 1333 flags |= LONGINT; 1334 /*FALLTHROUGH*/ 1335 case 'o': 1336 ADDUARG(); 1337 break; 1338 case 'p': 1339 ADDTYPE(TP_VOID); 1340 break; 1341 case 's': 1342 #ifdef PRINTF_WIDE_CHAR 1343 if (flags & LONGINT) 1344 ADDTYPE(TP_WCHAR); 1345 else 1346 #endif 1347 ADDTYPE(TP_CHAR); 1348 break; 1349 case 'U': 1350 flags |= LONGINT; 1351 /*FALLTHROUGH*/ 1352 case 'u': 1353 case 'X': 1354 case 'x': 1355 ADDUARG(); 1356 break; 1357 default: /* "%?" prints ?, unless ? is NUL */ 1358 if (ch == '\0') 1359 goto done; 1360 break; 1361 } 1362 } 1363 done: 1364 /* 1365 * Build the argument table. 1366 */ 1367 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1368 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1369 *argtable = mmap(NULL, *argtablesiz, 1370 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1371 if (*argtable == MAP_FAILED) 1372 return (-1); 1373 } 1374 1375 for (n = 1; n <= tablemax; n++) { 1376 switch (typetable[n]) { 1377 case T_UNUSED: 1378 case T_CHAR: 1379 case T_U_CHAR: 1380 case T_SHORT: 1381 case T_U_SHORT: 1382 case T_INT: 1383 (*argtable)[n].intarg = va_arg(ap, int); 1384 break; 1385 case TP_SHORT: 1386 (*argtable)[n].pshortarg = va_arg(ap, short *); 1387 break; 1388 case T_U_INT: 1389 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1390 break; 1391 case TP_INT: 1392 (*argtable)[n].pintarg = va_arg(ap, int *); 1393 break; 1394 case T_LONG: 1395 (*argtable)[n].longarg = va_arg(ap, long); 1396 break; 1397 case T_U_LONG: 1398 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1399 break; 1400 case TP_LONG: 1401 (*argtable)[n].plongarg = va_arg(ap, long *); 1402 break; 1403 case T_LLONG: 1404 (*argtable)[n].longlongarg = va_arg(ap, long long); 1405 break; 1406 case T_U_LLONG: 1407 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1408 break; 1409 case TP_LLONG: 1410 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1411 break; 1412 #ifdef FLOATING_POINT 1413 case T_DOUBLE: 1414 (*argtable)[n].doublearg = va_arg(ap, double); 1415 break; 1416 case T_LONG_DOUBLE: 1417 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1418 break; 1419 #endif 1420 case TP_CHAR: 1421 (*argtable)[n].pchararg = va_arg(ap, char *); 1422 break; 1423 case TP_VOID: 1424 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1425 break; 1426 case T_PTRINT: 1427 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1428 break; 1429 case TP_PTRINT: 1430 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1431 break; 1432 case T_SIZEINT: 1433 (*argtable)[n].sizearg = va_arg(ap, size_t); 1434 break; 1435 case T_SSIZEINT: 1436 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1437 break; 1438 case TP_SSIZEINT: 1439 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1440 break; 1441 case T_MAXINT: 1442 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1443 break; 1444 case T_MAXUINT: 1445 (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t); 1446 break; 1447 case TP_MAXINT: 1448 (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t *); 1449 break; 1450 #ifdef PRINTF_WIDE_CHAR 1451 case T_WINT: 1452 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1453 break; 1454 case TP_WCHAR: 1455 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1456 break; 1457 #endif 1458 } 1459 } 1460 goto finish; 1461 1462 overflow: 1463 errno = EOVERFLOW; 1464 ret = -1; 1465 1466 finish: 1467 if (typetable != NULL && typetable != stattypetable) { 1468 munmap(typetable, *argtablesiz); 1469 typetable = NULL; 1470 } 1471 return (ret); 1472 } 1473 1474 /* 1475 * Increase the size of the type table. 1476 */ 1477 static int 1478 __grow_type_table(unsigned char **typetable, int *tablesize) 1479 { 1480 unsigned char *oldtable = *typetable; 1481 int newsize = *tablesize * 2; 1482 1483 if (newsize < getpagesize()) 1484 newsize = getpagesize(); 1485 1486 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1487 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1488 MAP_ANON|MAP_PRIVATE, -1, 0); 1489 if (*typetable == MAP_FAILED) 1490 return (-1); 1491 bcopy(oldtable, *typetable, *tablesize); 1492 } else { 1493 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1494 MAP_ANON|MAP_PRIVATE, -1, 0); 1495 if (new == MAP_FAILED) 1496 return (-1); 1497 memmove(new, *typetable, *tablesize); 1498 munmap(*typetable, *tablesize); 1499 *typetable = new; 1500 } 1501 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1502 1503 *tablesize = newsize; 1504 return (0); 1505 } 1506 1507 1508 #ifdef FLOATING_POINT 1509 static int 1510 exponent(char *p0, int exp, int fmtch) 1511 { 1512 char *p, *t; 1513 char expbuf[MAXEXPDIG]; 1514 1515 p = p0; 1516 *p++ = fmtch; 1517 if (exp < 0) { 1518 exp = -exp; 1519 *p++ = '-'; 1520 } else 1521 *p++ = '+'; 1522 t = expbuf + MAXEXPDIG; 1523 if (exp > 9) { 1524 do { 1525 *--t = to_char(exp % 10); 1526 } while ((exp /= 10) > 9); 1527 *--t = to_char(exp); 1528 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1529 /* nothing */; 1530 } else { 1531 /* 1532 * Exponents for decimal floating point conversions 1533 * (%[eEgG]) must be at least two characters long, 1534 * whereas exponents for hexadecimal conversions can 1535 * be only one character long. 1536 */ 1537 if (fmtch == 'e' || fmtch == 'E') 1538 *p++ = '0'; 1539 *p++ = to_char(exp); 1540 } 1541 return (p - p0); 1542 } 1543 #endif /* FLOATING_POINT */ 1544