1 /* $OpenBSD: vfprintf.c,v 1.81 2021/09/08 15:57:27 jca 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 /* Make sure progname does not fill the whole buffer */ 809 strlcat(buf, __progname, sizeof(buf) - sizeof n_msg); 810 strlcat(buf, n_msg, sizeof buf); 811 strlcat(buf, fmt0, sizeof buf); 812 if ((p = strchr(buf, '\n'))) 813 *p = '\0'; 814 sendsyslog(buf, strlen(buf), LOG_CONS); 815 abort(); 816 break; 817 } 818 case 'O': 819 flags |= LONGINT; 820 /*FALLTHROUGH*/ 821 case 'o': 822 _umax = UARG(); 823 base = OCT; 824 goto nosign; 825 case 'p': 826 /* 827 * ``The argument shall be a pointer to void. The 828 * value of the pointer is converted to a sequence 829 * of printable characters, in an implementation- 830 * defined manner.'' 831 * -- ANSI X3J11 832 */ 833 _umax = (u_long)GETARG(void *); 834 base = HEX; 835 xdigs = xdigs_lower; 836 ox[1] = 'x'; 837 goto nosign; 838 case 's': { 839 size_t len; 840 841 #ifdef PRINTF_WIDE_CHAR 842 if (flags & LONGINT) { 843 wchar_t *wcp; 844 845 free(convbuf); 846 convbuf = NULL; 847 if ((wcp = GETARG(wchar_t *)) == NULL) { 848 struct syslog_data sdata = SYSLOG_DATA_INIT; 849 int save_errno = errno; 850 851 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 852 "vfprintf %%ls NULL in \"%s\"", fmt0); 853 errno = save_errno; 854 855 cp = "(null)"; 856 } else { 857 convbuf = __wcsconv(wcp, prec); 858 if (convbuf == NULL) { 859 ret = -1; 860 goto error; 861 } 862 cp = convbuf; 863 } 864 } else 865 #endif /* PRINTF_WIDE_CHAR */ 866 867 if ((cp = GETARG(char *)) == NULL) { 868 struct syslog_data sdata = SYSLOG_DATA_INIT; 869 int save_errno = errno; 870 871 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 872 "vfprintf %%s NULL in \"%s\"", fmt0); 873 errno = save_errno; 874 875 cp = "(null)"; 876 } 877 len = prec >= 0 ? strnlen(cp, prec) : strlen(cp); 878 if (len > INT_MAX) 879 goto overflow; 880 size = (int)len; 881 sign = '\0'; 882 } 883 break; 884 case 'U': 885 flags |= LONGINT; 886 /*FALLTHROUGH*/ 887 case 'u': 888 _umax = UARG(); 889 base = DEC; 890 goto nosign; 891 case 'X': 892 xdigs = xdigs_upper; 893 goto hex; 894 case 'x': 895 xdigs = xdigs_lower; 896 hex: _umax = UARG(); 897 base = HEX; 898 /* leading 0x/X only if non-zero */ 899 if (flags & ALT && _umax != 0) 900 ox[1] = ch; 901 902 /* unsigned conversions */ 903 nosign: sign = '\0'; 904 /* 905 * ``... diouXx conversions ... if a precision is 906 * specified, the 0 flag will be ignored.'' 907 * -- ANSI X3J11 908 */ 909 number: if ((dprec = prec) >= 0) 910 flags &= ~ZEROPAD; 911 912 /* 913 * ``The result of converting a zero value with an 914 * explicit precision of zero is no characters.'' 915 * -- ANSI X3J11 916 */ 917 cp = buf + BUF; 918 if (_umax != 0 || prec != 0) { 919 /* 920 * Unsigned mod is hard, and unsigned mod 921 * by a constant is easier than that by 922 * a variable; hence this switch. 923 */ 924 switch (base) { 925 case OCT: 926 do { 927 *--cp = to_char(_umax & 7); 928 _umax >>= 3; 929 } while (_umax); 930 /* handle octal leading 0 */ 931 if (flags & ALT && *cp != '0') 932 *--cp = '0'; 933 break; 934 935 case DEC: 936 /* many numbers are 1 digit */ 937 while (_umax >= 10) { 938 *--cp = to_char(_umax % 10); 939 _umax /= 10; 940 } 941 *--cp = to_char(_umax); 942 break; 943 944 case HEX: 945 do { 946 *--cp = xdigs[_umax & 15]; 947 _umax >>= 4; 948 } while (_umax); 949 break; 950 951 default: 952 cp = "bug in vfprintf: bad base"; 953 size = strlen(cp); 954 goto skipsize; 955 } 956 } 957 size = buf + BUF - cp; 958 if (size > BUF) /* should never happen */ 959 abort(); 960 skipsize: 961 break; 962 default: /* "%?" prints ?, unless ? is NUL */ 963 if (ch == '\0') 964 goto done; 965 /* pretend it was %c with argument ch */ 966 cp = buf; 967 *cp = ch; 968 size = 1; 969 sign = '\0'; 970 break; 971 } 972 973 /* 974 * All reasonable formats wind up here. At this point, `cp' 975 * points to a string which (if not flags&LADJUST) should be 976 * padded out to `width' places. If flags&ZEROPAD, it should 977 * first be prefixed by any sign or other prefix; otherwise, 978 * it should be blank padded before the prefix is emitted. 979 * After any left-hand padding and prefixing, emit zeroes 980 * required by a decimal %[diouxX] precision, then print the 981 * string proper, then emit zeroes required by any leftover 982 * floating precision; finally, if LADJUST, pad with blanks. 983 * 984 * Compute actual size, so we know how much to pad. 985 * size excludes decimal prec; realsz includes it. 986 */ 987 realsz = dprec > size ? dprec : size; 988 if (sign) 989 realsz++; 990 if (ox[1]) 991 realsz+= 2; 992 993 /* right-adjusting blank padding */ 994 if ((flags & (LADJUST|ZEROPAD)) == 0) 995 PAD(width - realsz, blanks); 996 997 /* prefix */ 998 if (sign) 999 PRINT(&sign, 1); 1000 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1001 ox[0] = '0'; 1002 PRINT(ox, 2); 1003 } 1004 1005 /* right-adjusting zero padding */ 1006 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1007 PAD(width - realsz, zeroes); 1008 1009 /* leading zeroes from decimal precision */ 1010 PAD(dprec - size, zeroes); 1011 1012 /* the string or number proper */ 1013 #ifdef FLOATING_POINT 1014 if ((flags & FPT) == 0) { 1015 PRINT(cp, size); 1016 } else { /* glue together f_p fragments */ 1017 if (decimal_point == NULL) 1018 decimal_point = nl_langinfo(RADIXCHAR); 1019 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1020 if (expt <= 0) { 1021 PRINT(zeroes, 1); 1022 if (prec || flags & ALT) 1023 PRINT(decimal_point, 1); 1024 PAD(-expt, zeroes); 1025 /* already handled initial 0's */ 1026 prec += expt; 1027 } else { 1028 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1029 cp += lead; 1030 if (prec || flags & ALT) 1031 PRINT(decimal_point, 1); 1032 } 1033 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1034 } else { /* %[eE] or sufficiently long %[gG] */ 1035 if (prec > 1 || flags & ALT) { 1036 buf[0] = *cp++; 1037 buf[1] = *decimal_point; 1038 PRINT(buf, 2); 1039 PRINT(cp, ndig-1); 1040 PAD(prec - ndig, zeroes); 1041 } else { /* XeYYY */ 1042 PRINT(cp, 1); 1043 } 1044 PRINT(expstr, expsize); 1045 } 1046 } 1047 #else 1048 PRINT(cp, size); 1049 #endif 1050 /* left-adjusting padding (always blank) */ 1051 if (flags & LADJUST) 1052 PAD(width - realsz, blanks); 1053 1054 /* finally, adjust ret */ 1055 if (width < realsz) 1056 width = realsz; 1057 if (width > INT_MAX - ret) 1058 goto overflow; 1059 ret += width; 1060 1061 FLUSH(); /* copy out the I/O vectors */ 1062 } 1063 done: 1064 FLUSH(); 1065 error: 1066 va_end(orgap); 1067 if (__sferror(fp)) 1068 ret = -1; 1069 goto finish; 1070 1071 overflow: 1072 errno = EOVERFLOW; 1073 ret = -1; 1074 1075 finish: 1076 #ifdef PRINTF_WIDE_CHAR 1077 free(convbuf); 1078 #endif 1079 #ifdef FLOATING_POINT 1080 if (dtoaresult) 1081 __freedtoa(dtoaresult); 1082 #endif 1083 if (argtable != NULL && argtable != statargtable) { 1084 munmap(argtable, argtablesiz); 1085 argtable = NULL; 1086 } 1087 return (ret); 1088 } 1089 1090 /* 1091 * Type ids for argument type table. 1092 */ 1093 #define T_UNUSED 0 1094 #define T_SHORT 1 1095 #define T_U_SHORT 2 1096 #define TP_SHORT 3 1097 #define T_INT 4 1098 #define T_U_INT 5 1099 #define TP_INT 6 1100 #define T_LONG 7 1101 #define T_U_LONG 8 1102 #define TP_LONG 9 1103 #define T_LLONG 10 1104 #define T_U_LLONG 11 1105 #define TP_LLONG 12 1106 #define T_DOUBLE 13 1107 #define T_LONG_DOUBLE 14 1108 #define TP_CHAR 15 1109 #define TP_VOID 16 1110 #define T_PTRINT 17 1111 #define TP_PTRINT 18 1112 #define T_SIZEINT 19 1113 #define T_SSIZEINT 20 1114 #define TP_SSIZEINT 21 1115 #define T_MAXINT 22 1116 #define T_MAXUINT 23 1117 #define TP_MAXINT 24 1118 #define T_CHAR 25 1119 #define T_U_CHAR 26 1120 #define T_WINT 27 1121 #define TP_WCHAR 28 1122 1123 /* 1124 * Find all arguments when a positional parameter is encountered. Returns a 1125 * table, indexed by argument number, of pointers to each arguments. The 1126 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1127 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1128 * used since we are attempting to make snprintf thread safe, and alloca is 1129 * problematic since we have nested functions..) 1130 */ 1131 static int 1132 __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1133 size_t *argtablesiz) 1134 { 1135 char *fmt; /* format string */ 1136 int ch; /* character from fmt */ 1137 int n, n2; /* handy integer (short term usage) */ 1138 char *cp; /* handy char pointer (short term usage) */ 1139 int flags; /* flags as above */ 1140 unsigned char *typetable; /* table of types */ 1141 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1142 int tablesize; /* current size of type table */ 1143 int tablemax; /* largest used index in table */ 1144 int nextarg; /* 1-based argument index */ 1145 int ret = 0; /* return value */ 1146 1147 /* 1148 * Add an argument type to the table, expanding if necessary. 1149 */ 1150 #define ADDTYPE(type) \ 1151 ((nextarg >= tablesize) ? \ 1152 __grow_type_table(&typetable, &tablesize) : 0, \ 1153 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1154 typetable[nextarg++] = type) 1155 1156 #define ADDSARG() \ 1157 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1158 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1159 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1160 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1161 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1162 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1163 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1164 1165 #define ADDUARG() \ 1166 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1167 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1168 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1169 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1170 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1171 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1172 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1173 1174 /* 1175 * Add * arguments to the type array. 1176 */ 1177 #define ADDASTER() \ 1178 n2 = 0; \ 1179 cp = fmt; \ 1180 while (is_digit(*cp)) { \ 1181 APPEND_DIGIT(n2, *cp); \ 1182 cp++; \ 1183 } \ 1184 if (*cp == '$') { \ 1185 int hold = nextarg; \ 1186 nextarg = n2; \ 1187 ADDTYPE(T_INT); \ 1188 nextarg = hold; \ 1189 fmt = ++cp; \ 1190 } else { \ 1191 ADDTYPE(T_INT); \ 1192 } 1193 fmt = (char *)fmt0; 1194 typetable = stattypetable; 1195 tablesize = STATIC_ARG_TBL_SIZE; 1196 tablemax = 0; 1197 nextarg = 1; 1198 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1199 1200 /* 1201 * Scan the format for conversions (`%' character). 1202 */ 1203 for (;;) { 1204 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1205 continue; 1206 if (ch == '\0') 1207 goto done; 1208 fmt++; /* skip over '%' */ 1209 1210 flags = 0; 1211 1212 rflag: ch = *fmt++; 1213 reswitch: switch (ch) { 1214 case ' ': 1215 case '#': 1216 case '\'': 1217 goto rflag; 1218 case '*': 1219 ADDASTER(); 1220 goto rflag; 1221 case '-': 1222 case '+': 1223 goto rflag; 1224 case '.': 1225 if ((ch = *fmt++) == '*') { 1226 ADDASTER(); 1227 goto rflag; 1228 } 1229 while (is_digit(ch)) { 1230 ch = *fmt++; 1231 } 1232 goto reswitch; 1233 case '0': 1234 goto rflag; 1235 case '1': case '2': case '3': case '4': 1236 case '5': case '6': case '7': case '8': case '9': 1237 n = 0; 1238 do { 1239 APPEND_DIGIT(n ,ch); 1240 ch = *fmt++; 1241 } while (is_digit(ch)); 1242 if (ch == '$') { 1243 nextarg = n; 1244 goto rflag; 1245 } 1246 goto reswitch; 1247 #ifdef FLOATING_POINT 1248 case 'L': 1249 flags |= LONGDBL; 1250 goto rflag; 1251 #endif 1252 case 'h': 1253 if (*fmt == 'h') { 1254 fmt++; 1255 flags |= CHARINT; 1256 } else { 1257 flags |= SHORTINT; 1258 } 1259 goto rflag; 1260 case 'j': 1261 flags |= MAXINT; 1262 goto rflag; 1263 case 'l': 1264 if (*fmt == 'l') { 1265 fmt++; 1266 flags |= LLONGINT; 1267 } else { 1268 flags |= LONGINT; 1269 } 1270 goto rflag; 1271 case 'q': 1272 flags |= LLONGINT; 1273 goto rflag; 1274 case 't': 1275 flags |= PTRINT; 1276 goto rflag; 1277 case 'z': 1278 flags |= SIZEINT; 1279 goto rflag; 1280 case 'c': 1281 #ifdef PRINTF_WIDE_CHAR 1282 if (flags & LONGINT) 1283 ADDTYPE(T_WINT); 1284 else 1285 #endif 1286 ADDTYPE(T_INT); 1287 break; 1288 case 'D': 1289 flags |= LONGINT; 1290 /*FALLTHROUGH*/ 1291 case 'd': 1292 case 'i': 1293 ADDSARG(); 1294 break; 1295 #ifdef FLOATING_POINT 1296 case 'a': 1297 case 'A': 1298 case 'e': 1299 case 'E': 1300 case 'f': 1301 case 'F': 1302 case 'g': 1303 case 'G': 1304 if (flags & LONGDBL) 1305 ADDTYPE(T_LONG_DOUBLE); 1306 else 1307 ADDTYPE(T_DOUBLE); 1308 break; 1309 #endif /* FLOATING_POINT */ 1310 case 'n': 1311 if (flags & LLONGINT) 1312 ADDTYPE(TP_LLONG); 1313 else if (flags & LONGINT) 1314 ADDTYPE(TP_LONG); 1315 else if (flags & SHORTINT) 1316 ADDTYPE(TP_SHORT); 1317 else if (flags & PTRINT) 1318 ADDTYPE(TP_PTRINT); 1319 else if (flags & SIZEINT) 1320 ADDTYPE(TP_SSIZEINT); 1321 else if (flags & MAXINT) 1322 ADDTYPE(TP_MAXINT); 1323 else 1324 ADDTYPE(TP_INT); 1325 continue; /* no output */ 1326 case 'O': 1327 flags |= LONGINT; 1328 /*FALLTHROUGH*/ 1329 case 'o': 1330 ADDUARG(); 1331 break; 1332 case 'p': 1333 ADDTYPE(TP_VOID); 1334 break; 1335 case 's': 1336 #ifdef PRINTF_WIDE_CHAR 1337 if (flags & LONGINT) 1338 ADDTYPE(TP_WCHAR); 1339 else 1340 #endif 1341 ADDTYPE(TP_CHAR); 1342 break; 1343 case 'U': 1344 flags |= LONGINT; 1345 /*FALLTHROUGH*/ 1346 case 'u': 1347 case 'X': 1348 case 'x': 1349 ADDUARG(); 1350 break; 1351 default: /* "%?" prints ?, unless ? is NUL */ 1352 if (ch == '\0') 1353 goto done; 1354 break; 1355 } 1356 } 1357 done: 1358 /* 1359 * Build the argument table. 1360 */ 1361 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1362 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1363 *argtable = mmap(NULL, *argtablesiz, 1364 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1365 if (*argtable == MAP_FAILED) 1366 return (-1); 1367 } 1368 1369 for (n = 1; n <= tablemax; n++) { 1370 switch (typetable[n]) { 1371 case T_UNUSED: 1372 case T_CHAR: 1373 case T_U_CHAR: 1374 case T_SHORT: 1375 case T_U_SHORT: 1376 case T_INT: 1377 (*argtable)[n].intarg = va_arg(ap, int); 1378 break; 1379 case TP_SHORT: 1380 (*argtable)[n].pshortarg = va_arg(ap, short *); 1381 break; 1382 case T_U_INT: 1383 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1384 break; 1385 case TP_INT: 1386 (*argtable)[n].pintarg = va_arg(ap, int *); 1387 break; 1388 case T_LONG: 1389 (*argtable)[n].longarg = va_arg(ap, long); 1390 break; 1391 case T_U_LONG: 1392 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1393 break; 1394 case TP_LONG: 1395 (*argtable)[n].plongarg = va_arg(ap, long *); 1396 break; 1397 case T_LLONG: 1398 (*argtable)[n].longlongarg = va_arg(ap, long long); 1399 break; 1400 case T_U_LLONG: 1401 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1402 break; 1403 case TP_LLONG: 1404 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1405 break; 1406 #ifdef FLOATING_POINT 1407 case T_DOUBLE: 1408 (*argtable)[n].doublearg = va_arg(ap, double); 1409 break; 1410 case T_LONG_DOUBLE: 1411 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1412 break; 1413 #endif 1414 case TP_CHAR: 1415 (*argtable)[n].pchararg = va_arg(ap, char *); 1416 break; 1417 case TP_VOID: 1418 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1419 break; 1420 case T_PTRINT: 1421 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1422 break; 1423 case TP_PTRINT: 1424 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1425 break; 1426 case T_SIZEINT: 1427 (*argtable)[n].sizearg = va_arg(ap, size_t); 1428 break; 1429 case T_SSIZEINT: 1430 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1431 break; 1432 case TP_SSIZEINT: 1433 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1434 break; 1435 case T_MAXINT: 1436 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1437 break; 1438 case T_MAXUINT: 1439 (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t); 1440 break; 1441 case TP_MAXINT: 1442 (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t *); 1443 break; 1444 #ifdef PRINTF_WIDE_CHAR 1445 case T_WINT: 1446 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1447 break; 1448 case TP_WCHAR: 1449 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1450 break; 1451 #endif 1452 } 1453 } 1454 goto finish; 1455 1456 overflow: 1457 errno = EOVERFLOW; 1458 ret = -1; 1459 1460 finish: 1461 if (typetable != NULL && typetable != stattypetable) { 1462 munmap(typetable, *argtablesiz); 1463 typetable = NULL; 1464 } 1465 return (ret); 1466 } 1467 1468 /* 1469 * Increase the size of the type table. 1470 */ 1471 static int 1472 __grow_type_table(unsigned char **typetable, int *tablesize) 1473 { 1474 unsigned char *oldtable = *typetable; 1475 int newsize = *tablesize * 2; 1476 1477 if (newsize < getpagesize()) 1478 newsize = getpagesize(); 1479 1480 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1481 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1482 MAP_ANON|MAP_PRIVATE, -1, 0); 1483 if (*typetable == MAP_FAILED) 1484 return (-1); 1485 bcopy(oldtable, *typetable, *tablesize); 1486 } else { 1487 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1488 MAP_ANON|MAP_PRIVATE, -1, 0); 1489 if (new == MAP_FAILED) 1490 return (-1); 1491 memmove(new, *typetable, *tablesize); 1492 munmap(*typetable, *tablesize); 1493 *typetable = new; 1494 } 1495 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1496 1497 *tablesize = newsize; 1498 return (0); 1499 } 1500 1501 1502 #ifdef FLOATING_POINT 1503 static int 1504 exponent(char *p0, int exp, int fmtch) 1505 { 1506 char *p, *t; 1507 char expbuf[MAXEXPDIG]; 1508 1509 p = p0; 1510 *p++ = fmtch; 1511 if (exp < 0) { 1512 exp = -exp; 1513 *p++ = '-'; 1514 } else 1515 *p++ = '+'; 1516 t = expbuf + MAXEXPDIG; 1517 if (exp > 9) { 1518 do { 1519 *--t = to_char(exp % 10); 1520 } while ((exp /= 10) > 9); 1521 *--t = to_char(exp); 1522 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1523 /* nothing */; 1524 } else { 1525 /* 1526 * Exponents for decimal floating point conversions 1527 * (%[eEgG]) must be at least two characters long, 1528 * whereas exponents for hexadecimal conversions can 1529 * be only one character long. 1530 */ 1531 if (fmtch == 'e' || fmtch == 'E') 1532 *p++ = '0'; 1533 *p++ = to_char(exp); 1534 } 1535 return (p - p0); 1536 } 1537 #endif /* FLOATING_POINT */ 1538