1 /* $OpenBSD: vfprintf.c,v 1.82 2023/10/06 16:41:02 millert 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 return (EOF); 462 463 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 464 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 465 fp->_file >= 0) 466 return (__sbprintf(fp, fmt0, ap)); 467 468 fmt = (char *)fmt0; 469 argtable = NULL; 470 nextarg = 1; 471 va_copy(orgap, ap); 472 uio.uio_iov = iovp = iov; 473 uio.uio_resid = 0; 474 uio.uio_iovcnt = 0; 475 ret = 0; 476 #ifdef PRINTF_WIDE_CHAR 477 convbuf = NULL; 478 #endif 479 480 /* 481 * Scan the format for conversions (`%' character). 482 */ 483 for (;;) { 484 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 485 continue; 486 487 if (fmt != cp) { 488 ptrdiff_t m = fmt - cp; 489 if (m < 0 || m > INT_MAX - ret) 490 goto overflow; 491 PRINT(cp, m); 492 ret += m; 493 } 494 if (ch == '\0') 495 goto done; 496 fmt++; /* skip over '%' */ 497 498 flags = 0; 499 dprec = 0; 500 width = 0; 501 prec = -1; 502 sign = '\0'; 503 ox[1] = '\0'; 504 505 rflag: ch = *fmt++; 506 reswitch: switch (ch) { 507 case ' ': 508 /* 509 * ``If the space and + flags both appear, the space 510 * flag will be ignored.'' 511 * -- ANSI X3J11 512 */ 513 if (!sign) 514 sign = ' '; 515 goto rflag; 516 case '#': 517 flags |= ALT; 518 goto rflag; 519 case '\'': 520 /* grouping not implemented */ 521 goto rflag; 522 case '*': 523 /* 524 * ``A negative field width argument is taken as a 525 * - flag followed by a positive field width.'' 526 * -- ANSI X3J11 527 * They don't exclude field widths read from args. 528 */ 529 GETASTER(width); 530 if (width >= 0) 531 goto rflag; 532 if (width == INT_MIN) 533 goto overflow; 534 width = -width; 535 /* FALLTHROUGH */ 536 case '-': 537 flags |= LADJUST; 538 goto rflag; 539 case '+': 540 sign = '+'; 541 goto rflag; 542 case '.': 543 if ((ch = *fmt++) == '*') { 544 GETASTER(n); 545 prec = n < 0 ? -1 : n; 546 goto rflag; 547 } 548 n = 0; 549 while (is_digit(ch)) { 550 APPEND_DIGIT(n, ch); 551 ch = *fmt++; 552 } 553 if (ch == '$') { 554 nextarg = n; 555 if (argtable == NULL) { 556 argtable = statargtable; 557 if (__find_arguments(fmt0, orgap, 558 &argtable, &argtablesiz) == -1) { 559 ret = -1; 560 goto error; 561 } 562 } 563 goto rflag; 564 } 565 prec = n; 566 goto reswitch; 567 case '0': 568 /* 569 * ``Note that 0 is taken as a flag, not as the 570 * beginning of a field width.'' 571 * -- ANSI X3J11 572 */ 573 flags |= ZEROPAD; 574 goto rflag; 575 case '1': case '2': case '3': case '4': 576 case '5': case '6': case '7': case '8': case '9': 577 n = 0; 578 do { 579 APPEND_DIGIT(n, ch); 580 ch = *fmt++; 581 } while (is_digit(ch)); 582 if (ch == '$') { 583 nextarg = n; 584 if (argtable == NULL) { 585 argtable = statargtable; 586 if (__find_arguments(fmt0, orgap, 587 &argtable, &argtablesiz) == -1) { 588 ret = -1; 589 goto error; 590 } 591 } 592 goto rflag; 593 } 594 width = n; 595 goto reswitch; 596 #ifdef FLOATING_POINT 597 case 'L': 598 flags |= LONGDBL; 599 goto rflag; 600 #endif 601 case 'h': 602 if (*fmt == 'h') { 603 fmt++; 604 flags |= CHARINT; 605 } else { 606 flags |= SHORTINT; 607 } 608 goto rflag; 609 case 'j': 610 flags |= MAXINT; 611 goto rflag; 612 case 'l': 613 if (*fmt == 'l') { 614 fmt++; 615 flags |= LLONGINT; 616 } else { 617 flags |= LONGINT; 618 } 619 goto rflag; 620 case 'q': 621 flags |= LLONGINT; 622 goto rflag; 623 case 't': 624 flags |= PTRINT; 625 goto rflag; 626 case 'z': 627 flags |= SIZEINT; 628 goto rflag; 629 case 'c': 630 #ifdef PRINTF_WIDE_CHAR 631 if (flags & LONGINT) { 632 mbstate_t mbs; 633 size_t mbseqlen; 634 635 memset(&mbs, 0, sizeof(mbs)); 636 mbseqlen = wcrtomb(buf, 637 (wchar_t)GETARG(wint_t), &mbs); 638 if (mbseqlen == (size_t)-1) { 639 ret = -1; 640 goto error; 641 } 642 cp = buf; 643 size = (int)mbseqlen; 644 } else { 645 #endif 646 *(cp = buf) = GETARG(int); 647 size = 1; 648 #ifdef PRINTF_WIDE_CHAR 649 } 650 #endif 651 sign = '\0'; 652 break; 653 case 'D': 654 flags |= LONGINT; 655 /*FALLTHROUGH*/ 656 case 'd': 657 case 'i': 658 _umax = SARG(); 659 if ((intmax_t)_umax < 0) { 660 _umax = -_umax; 661 sign = '-'; 662 } 663 base = DEC; 664 goto number; 665 #ifdef FLOATING_POINT 666 case 'a': 667 case 'A': 668 if (ch == 'a') { 669 ox[1] = 'x'; 670 xdigs = xdigs_lower; 671 expchar = 'p'; 672 } else { 673 ox[1] = 'X'; 674 xdigs = xdigs_upper; 675 expchar = 'P'; 676 } 677 if (prec >= 0) 678 prec++; 679 if (dtoaresult) 680 __freedtoa(dtoaresult); 681 if (flags & LONGDBL) { 682 fparg.ldbl = GETARG(long double); 683 dtoaresult = cp = 684 __hldtoa(fparg.ldbl, xdigs, prec, 685 &expt, &signflag, &dtoaend); 686 if (dtoaresult == NULL) { 687 errno = ENOMEM; 688 goto error; 689 } 690 } else { 691 fparg.dbl = GETARG(double); 692 dtoaresult = cp = 693 __hdtoa(fparg.dbl, xdigs, prec, 694 &expt, &signflag, &dtoaend); 695 if (dtoaresult == NULL) { 696 errno = ENOMEM; 697 goto error; 698 } 699 } 700 if (prec < 0) 701 prec = dtoaend - cp; 702 if (expt == INT_MAX) 703 ox[1] = '\0'; 704 goto fp_common; 705 case 'e': 706 case 'E': 707 expchar = ch; 708 if (prec < 0) /* account for digit before decpt */ 709 prec = DEFPREC + 1; 710 else 711 prec++; 712 goto fp_begin; 713 case 'f': 714 case 'F': 715 expchar = '\0'; 716 goto fp_begin; 717 case 'g': 718 case 'G': 719 expchar = ch - ('g' - 'e'); 720 if (prec == 0) 721 prec = 1; 722 fp_begin: 723 if (prec < 0) 724 prec = DEFPREC; 725 if (dtoaresult) 726 __freedtoa(dtoaresult); 727 if (flags & LONGDBL) { 728 fparg.ldbl = GETARG(long double); 729 dtoaresult = cp = 730 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 731 &expt, &signflag, &dtoaend); 732 if (dtoaresult == NULL) { 733 errno = ENOMEM; 734 goto error; 735 } 736 } else { 737 fparg.dbl = GETARG(double); 738 dtoaresult = cp = 739 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 740 &expt, &signflag, &dtoaend); 741 if (dtoaresult == NULL) { 742 errno = ENOMEM; 743 goto error; 744 } 745 if (expt == 9999) 746 expt = INT_MAX; 747 } 748 fp_common: 749 if (signflag) 750 sign = '-'; 751 if (expt == INT_MAX) { /* inf or nan */ 752 if (*cp == 'N') 753 cp = (ch >= 'a') ? "nan" : "NAN"; 754 else 755 cp = (ch >= 'a') ? "inf" : "INF"; 756 size = 3; 757 flags &= ~ZEROPAD; 758 break; 759 } 760 flags |= FPT; 761 ndig = dtoaend - cp; 762 if (ch == 'g' || ch == 'G') { 763 if (expt > -4 && expt <= prec) { 764 /* Make %[gG] smell like %[fF] */ 765 expchar = '\0'; 766 if (flags & ALT) 767 prec -= expt; 768 else 769 prec = ndig - expt; 770 if (prec < 0) 771 prec = 0; 772 } else { 773 /* 774 * Make %[gG] smell like %[eE], but 775 * trim trailing zeroes if no # flag. 776 */ 777 if (!(flags & ALT)) 778 prec = ndig; 779 } 780 } 781 if (expchar) { 782 expsize = exponent(expstr, expt - 1, expchar); 783 size = expsize + prec; 784 if (prec > 1 || flags & ALT) 785 ++size; 786 } else { 787 /* space for digits before decimal point */ 788 if (expt > 0) 789 size = expt; 790 else /* "0" */ 791 size = 1; 792 /* space for decimal pt and following digits */ 793 if (prec || flags & ALT) 794 size += prec + 1; 795 lead = expt; 796 } 797 break; 798 #endif /* FLOATING_POINT */ 799 case 'n': { 800 static const char n_msg[] = ": *printf used %n, aborting: "; 801 char buf[1024], *p; 802 803 /* <10> is LOG_CRIT */ 804 strlcpy(buf, "<10>", sizeof buf); 805 806 /* Make sure progname does not fill the whole buffer */ 807 strlcat(buf, __progname, sizeof(buf) - sizeof n_msg); 808 strlcat(buf, n_msg, sizeof buf); 809 strlcat(buf, fmt0, sizeof buf); 810 if ((p = strchr(buf, '\n'))) 811 *p = '\0'; 812 sendsyslog(buf, strlen(buf), LOG_CONS); 813 abort(); 814 break; 815 } 816 case 'O': 817 flags |= LONGINT; 818 /*FALLTHROUGH*/ 819 case 'o': 820 _umax = UARG(); 821 base = OCT; 822 goto nosign; 823 case 'p': 824 /* 825 * ``The argument shall be a pointer to void. The 826 * value of the pointer is converted to a sequence 827 * of printable characters, in an implementation- 828 * defined manner.'' 829 * -- ANSI X3J11 830 */ 831 _umax = (u_long)GETARG(void *); 832 base = HEX; 833 xdigs = xdigs_lower; 834 ox[1] = 'x'; 835 goto nosign; 836 case 's': { 837 size_t len; 838 839 #ifdef PRINTF_WIDE_CHAR 840 if (flags & LONGINT) { 841 wchar_t *wcp; 842 843 free(convbuf); 844 convbuf = NULL; 845 if ((wcp = GETARG(wchar_t *)) == NULL) { 846 struct syslog_data sdata = SYSLOG_DATA_INIT; 847 int save_errno = errno; 848 849 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 850 "vfprintf %%ls NULL in \"%s\"", fmt0); 851 errno = save_errno; 852 853 cp = "(null)"; 854 } else { 855 convbuf = __wcsconv(wcp, prec); 856 if (convbuf == NULL) { 857 ret = -1; 858 goto error; 859 } 860 cp = convbuf; 861 } 862 } else 863 #endif /* PRINTF_WIDE_CHAR */ 864 865 if ((cp = GETARG(char *)) == NULL) { 866 struct syslog_data sdata = SYSLOG_DATA_INIT; 867 int save_errno = errno; 868 869 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 870 "vfprintf %%s NULL in \"%s\"", fmt0); 871 errno = save_errno; 872 873 cp = "(null)"; 874 } 875 len = prec >= 0 ? strnlen(cp, prec) : strlen(cp); 876 if (len > INT_MAX) 877 goto overflow; 878 size = (int)len; 879 sign = '\0'; 880 } 881 break; 882 case 'U': 883 flags |= LONGINT; 884 /*FALLTHROUGH*/ 885 case 'u': 886 _umax = UARG(); 887 base = DEC; 888 goto nosign; 889 case 'X': 890 xdigs = xdigs_upper; 891 goto hex; 892 case 'x': 893 xdigs = xdigs_lower; 894 hex: _umax = UARG(); 895 base = HEX; 896 /* leading 0x/X only if non-zero */ 897 if (flags & ALT && _umax != 0) 898 ox[1] = ch; 899 900 /* unsigned conversions */ 901 nosign: sign = '\0'; 902 /* 903 * ``... diouXx conversions ... if a precision is 904 * specified, the 0 flag will be ignored.'' 905 * -- ANSI X3J11 906 */ 907 number: if ((dprec = prec) >= 0) 908 flags &= ~ZEROPAD; 909 910 /* 911 * ``The result of converting a zero value with an 912 * explicit precision of zero is no characters.'' 913 * -- ANSI X3J11 914 */ 915 cp = buf + BUF; 916 if (_umax != 0 || prec != 0) { 917 /* 918 * Unsigned mod is hard, and unsigned mod 919 * by a constant is easier than that by 920 * a variable; hence this switch. 921 */ 922 switch (base) { 923 case OCT: 924 do { 925 *--cp = to_char(_umax & 7); 926 _umax >>= 3; 927 } while (_umax); 928 /* handle octal leading 0 */ 929 if (flags & ALT && *cp != '0') 930 *--cp = '0'; 931 break; 932 933 case DEC: 934 /* many numbers are 1 digit */ 935 while (_umax >= 10) { 936 *--cp = to_char(_umax % 10); 937 _umax /= 10; 938 } 939 *--cp = to_char(_umax); 940 break; 941 942 case HEX: 943 do { 944 *--cp = xdigs[_umax & 15]; 945 _umax >>= 4; 946 } while (_umax); 947 break; 948 949 default: 950 cp = "bug in vfprintf: bad base"; 951 size = strlen(cp); 952 goto skipsize; 953 } 954 } 955 size = buf + BUF - cp; 956 if (size > BUF) /* should never happen */ 957 abort(); 958 skipsize: 959 break; 960 default: /* "%?" prints ?, unless ? is NUL */ 961 if (ch == '\0') 962 goto done; 963 /* pretend it was %c with argument ch */ 964 cp = buf; 965 *cp = ch; 966 size = 1; 967 sign = '\0'; 968 break; 969 } 970 971 /* 972 * All reasonable formats wind up here. At this point, `cp' 973 * points to a string which (if not flags&LADJUST) should be 974 * padded out to `width' places. If flags&ZEROPAD, it should 975 * first be prefixed by any sign or other prefix; otherwise, 976 * it should be blank padded before the prefix is emitted. 977 * After any left-hand padding and prefixing, emit zeroes 978 * required by a decimal %[diouxX] precision, then print the 979 * string proper, then emit zeroes required by any leftover 980 * floating precision; finally, if LADJUST, pad with blanks. 981 * 982 * Compute actual size, so we know how much to pad. 983 * size excludes decimal prec; realsz includes it. 984 */ 985 realsz = dprec > size ? dprec : size; 986 if (sign) 987 realsz++; 988 if (ox[1]) 989 realsz+= 2; 990 991 /* right-adjusting blank padding */ 992 if ((flags & (LADJUST|ZEROPAD)) == 0) 993 PAD(width - realsz, blanks); 994 995 /* prefix */ 996 if (sign) 997 PRINT(&sign, 1); 998 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 999 ox[0] = '0'; 1000 PRINT(ox, 2); 1001 } 1002 1003 /* right-adjusting zero padding */ 1004 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1005 PAD(width - realsz, zeroes); 1006 1007 /* leading zeroes from decimal precision */ 1008 PAD(dprec - size, zeroes); 1009 1010 /* the string or number proper */ 1011 #ifdef FLOATING_POINT 1012 if ((flags & FPT) == 0) { 1013 PRINT(cp, size); 1014 } else { /* glue together f_p fragments */ 1015 if (decimal_point == NULL) 1016 decimal_point = nl_langinfo(RADIXCHAR); 1017 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1018 if (expt <= 0) { 1019 PRINT(zeroes, 1); 1020 if (prec || flags & ALT) 1021 PRINT(decimal_point, 1); 1022 PAD(-expt, zeroes); 1023 /* already handled initial 0's */ 1024 prec += expt; 1025 } else { 1026 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1027 cp += lead; 1028 if (prec || flags & ALT) 1029 PRINT(decimal_point, 1); 1030 } 1031 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1032 } else { /* %[eE] or sufficiently long %[gG] */ 1033 if (prec > 1 || flags & ALT) { 1034 buf[0] = *cp++; 1035 buf[1] = *decimal_point; 1036 PRINT(buf, 2); 1037 PRINT(cp, ndig-1); 1038 PAD(prec - ndig, zeroes); 1039 } else { /* XeYYY */ 1040 PRINT(cp, 1); 1041 } 1042 PRINT(expstr, expsize); 1043 } 1044 } 1045 #else 1046 PRINT(cp, size); 1047 #endif 1048 /* left-adjusting padding (always blank) */ 1049 if (flags & LADJUST) 1050 PAD(width - realsz, blanks); 1051 1052 /* finally, adjust ret */ 1053 if (width < realsz) 1054 width = realsz; 1055 if (width > INT_MAX - ret) 1056 goto overflow; 1057 ret += width; 1058 1059 FLUSH(); /* copy out the I/O vectors */ 1060 } 1061 done: 1062 FLUSH(); 1063 error: 1064 va_end(orgap); 1065 if (__sferror(fp)) 1066 ret = -1; 1067 goto finish; 1068 1069 overflow: 1070 errno = EOVERFLOW; 1071 ret = -1; 1072 1073 finish: 1074 #ifdef PRINTF_WIDE_CHAR 1075 free(convbuf); 1076 #endif 1077 #ifdef FLOATING_POINT 1078 if (dtoaresult) 1079 __freedtoa(dtoaresult); 1080 #endif 1081 if (argtable != NULL && argtable != statargtable) { 1082 munmap(argtable, argtablesiz); 1083 argtable = NULL; 1084 } 1085 return (ret); 1086 } 1087 1088 /* 1089 * Type ids for argument type table. 1090 */ 1091 #define T_UNUSED 0 1092 #define T_SHORT 1 1093 #define T_U_SHORT 2 1094 #define TP_SHORT 3 1095 #define T_INT 4 1096 #define T_U_INT 5 1097 #define TP_INT 6 1098 #define T_LONG 7 1099 #define T_U_LONG 8 1100 #define TP_LONG 9 1101 #define T_LLONG 10 1102 #define T_U_LLONG 11 1103 #define TP_LLONG 12 1104 #define T_DOUBLE 13 1105 #define T_LONG_DOUBLE 14 1106 #define TP_CHAR 15 1107 #define TP_VOID 16 1108 #define T_PTRINT 17 1109 #define TP_PTRINT 18 1110 #define T_SIZEINT 19 1111 #define T_SSIZEINT 20 1112 #define TP_SSIZEINT 21 1113 #define T_MAXINT 22 1114 #define T_MAXUINT 23 1115 #define TP_MAXINT 24 1116 #define T_CHAR 25 1117 #define T_U_CHAR 26 1118 #define T_WINT 27 1119 #define TP_WCHAR 28 1120 1121 /* 1122 * Find all arguments when a positional parameter is encountered. Returns a 1123 * table, indexed by argument number, of pointers to each arguments. The 1124 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1125 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1126 * used since we are attempting to make snprintf thread safe, and alloca is 1127 * problematic since we have nested functions..) 1128 */ 1129 static int 1130 __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1131 size_t *argtablesiz) 1132 { 1133 char *fmt; /* format string */ 1134 int ch; /* character from fmt */ 1135 int n, n2; /* handy integer (short term usage) */ 1136 char *cp; /* handy char pointer (short term usage) */ 1137 int flags; /* flags as above */ 1138 unsigned char *typetable; /* table of types */ 1139 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1140 int tablesize; /* current size of type table */ 1141 int tablemax; /* largest used index in table */ 1142 int nextarg; /* 1-based argument index */ 1143 int ret = 0; /* return value */ 1144 1145 /* 1146 * Add an argument type to the table, expanding if necessary. 1147 */ 1148 #define ADDTYPE(type) \ 1149 ((nextarg >= tablesize) ? \ 1150 __grow_type_table(&typetable, &tablesize) : 0, \ 1151 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1152 typetable[nextarg++] = type) 1153 1154 #define ADDSARG() \ 1155 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1156 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1157 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1158 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1159 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1160 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1161 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1162 1163 #define ADDUARG() \ 1164 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1165 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1166 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1167 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1168 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1169 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1170 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1171 1172 /* 1173 * Add * arguments to the type array. 1174 */ 1175 #define ADDASTER() \ 1176 n2 = 0; \ 1177 cp = fmt; \ 1178 while (is_digit(*cp)) { \ 1179 APPEND_DIGIT(n2, *cp); \ 1180 cp++; \ 1181 } \ 1182 if (*cp == '$') { \ 1183 int hold = nextarg; \ 1184 nextarg = n2; \ 1185 ADDTYPE(T_INT); \ 1186 nextarg = hold; \ 1187 fmt = ++cp; \ 1188 } else { \ 1189 ADDTYPE(T_INT); \ 1190 } 1191 fmt = (char *)fmt0; 1192 typetable = stattypetable; 1193 tablesize = STATIC_ARG_TBL_SIZE; 1194 tablemax = 0; 1195 nextarg = 1; 1196 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1197 1198 /* 1199 * Scan the format for conversions (`%' character). 1200 */ 1201 for (;;) { 1202 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1203 continue; 1204 if (ch == '\0') 1205 goto done; 1206 fmt++; /* skip over '%' */ 1207 1208 flags = 0; 1209 1210 rflag: ch = *fmt++; 1211 reswitch: switch (ch) { 1212 case ' ': 1213 case '#': 1214 case '\'': 1215 goto rflag; 1216 case '*': 1217 ADDASTER(); 1218 goto rflag; 1219 case '-': 1220 case '+': 1221 goto rflag; 1222 case '.': 1223 if ((ch = *fmt++) == '*') { 1224 ADDASTER(); 1225 goto rflag; 1226 } 1227 while (is_digit(ch)) { 1228 ch = *fmt++; 1229 } 1230 goto reswitch; 1231 case '0': 1232 goto rflag; 1233 case '1': case '2': case '3': case '4': 1234 case '5': case '6': case '7': case '8': case '9': 1235 n = 0; 1236 do { 1237 APPEND_DIGIT(n ,ch); 1238 ch = *fmt++; 1239 } while (is_digit(ch)); 1240 if (ch == '$') { 1241 nextarg = n; 1242 goto rflag; 1243 } 1244 goto reswitch; 1245 #ifdef FLOATING_POINT 1246 case 'L': 1247 flags |= LONGDBL; 1248 goto rflag; 1249 #endif 1250 case 'h': 1251 if (*fmt == 'h') { 1252 fmt++; 1253 flags |= CHARINT; 1254 } else { 1255 flags |= SHORTINT; 1256 } 1257 goto rflag; 1258 case 'j': 1259 flags |= MAXINT; 1260 goto rflag; 1261 case 'l': 1262 if (*fmt == 'l') { 1263 fmt++; 1264 flags |= LLONGINT; 1265 } else { 1266 flags |= LONGINT; 1267 } 1268 goto rflag; 1269 case 'q': 1270 flags |= LLONGINT; 1271 goto rflag; 1272 case 't': 1273 flags |= PTRINT; 1274 goto rflag; 1275 case 'z': 1276 flags |= SIZEINT; 1277 goto rflag; 1278 case 'c': 1279 #ifdef PRINTF_WIDE_CHAR 1280 if (flags & LONGINT) 1281 ADDTYPE(T_WINT); 1282 else 1283 #endif 1284 ADDTYPE(T_INT); 1285 break; 1286 case 'D': 1287 flags |= LONGINT; 1288 /*FALLTHROUGH*/ 1289 case 'd': 1290 case 'i': 1291 ADDSARG(); 1292 break; 1293 #ifdef FLOATING_POINT 1294 case 'a': 1295 case 'A': 1296 case 'e': 1297 case 'E': 1298 case 'f': 1299 case 'F': 1300 case 'g': 1301 case 'G': 1302 if (flags & LONGDBL) 1303 ADDTYPE(T_LONG_DOUBLE); 1304 else 1305 ADDTYPE(T_DOUBLE); 1306 break; 1307 #endif /* FLOATING_POINT */ 1308 case 'n': 1309 if (flags & LLONGINT) 1310 ADDTYPE(TP_LLONG); 1311 else if (flags & LONGINT) 1312 ADDTYPE(TP_LONG); 1313 else if (flags & SHORTINT) 1314 ADDTYPE(TP_SHORT); 1315 else if (flags & PTRINT) 1316 ADDTYPE(TP_PTRINT); 1317 else if (flags & SIZEINT) 1318 ADDTYPE(TP_SSIZEINT); 1319 else if (flags & MAXINT) 1320 ADDTYPE(TP_MAXINT); 1321 else 1322 ADDTYPE(TP_INT); 1323 continue; /* no output */ 1324 case 'O': 1325 flags |= LONGINT; 1326 /*FALLTHROUGH*/ 1327 case 'o': 1328 ADDUARG(); 1329 break; 1330 case 'p': 1331 ADDTYPE(TP_VOID); 1332 break; 1333 case 's': 1334 #ifdef PRINTF_WIDE_CHAR 1335 if (flags & LONGINT) 1336 ADDTYPE(TP_WCHAR); 1337 else 1338 #endif 1339 ADDTYPE(TP_CHAR); 1340 break; 1341 case 'U': 1342 flags |= LONGINT; 1343 /*FALLTHROUGH*/ 1344 case 'u': 1345 case 'X': 1346 case 'x': 1347 ADDUARG(); 1348 break; 1349 default: /* "%?" prints ?, unless ? is NUL */ 1350 if (ch == '\0') 1351 goto done; 1352 break; 1353 } 1354 } 1355 done: 1356 /* 1357 * Build the argument table. 1358 */ 1359 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1360 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1361 *argtable = mmap(NULL, *argtablesiz, 1362 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1363 if (*argtable == MAP_FAILED) 1364 return (-1); 1365 } 1366 1367 for (n = 1; n <= tablemax; n++) { 1368 switch (typetable[n]) { 1369 case T_UNUSED: 1370 case T_CHAR: 1371 case T_U_CHAR: 1372 case T_SHORT: 1373 case T_U_SHORT: 1374 case T_INT: 1375 (*argtable)[n].intarg = va_arg(ap, int); 1376 break; 1377 case TP_SHORT: 1378 (*argtable)[n].pshortarg = va_arg(ap, short *); 1379 break; 1380 case T_U_INT: 1381 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1382 break; 1383 case TP_INT: 1384 (*argtable)[n].pintarg = va_arg(ap, int *); 1385 break; 1386 case T_LONG: 1387 (*argtable)[n].longarg = va_arg(ap, long); 1388 break; 1389 case T_U_LONG: 1390 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1391 break; 1392 case TP_LONG: 1393 (*argtable)[n].plongarg = va_arg(ap, long *); 1394 break; 1395 case T_LLONG: 1396 (*argtable)[n].longlongarg = va_arg(ap, long long); 1397 break; 1398 case T_U_LLONG: 1399 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1400 break; 1401 case TP_LLONG: 1402 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1403 break; 1404 #ifdef FLOATING_POINT 1405 case T_DOUBLE: 1406 (*argtable)[n].doublearg = va_arg(ap, double); 1407 break; 1408 case T_LONG_DOUBLE: 1409 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1410 break; 1411 #endif 1412 case TP_CHAR: 1413 (*argtable)[n].pchararg = va_arg(ap, char *); 1414 break; 1415 case TP_VOID: 1416 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1417 break; 1418 case T_PTRINT: 1419 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1420 break; 1421 case TP_PTRINT: 1422 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1423 break; 1424 case T_SIZEINT: 1425 (*argtable)[n].sizearg = va_arg(ap, size_t); 1426 break; 1427 case T_SSIZEINT: 1428 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1429 break; 1430 case TP_SSIZEINT: 1431 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1432 break; 1433 case T_MAXINT: 1434 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1435 break; 1436 case T_MAXUINT: 1437 (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t); 1438 break; 1439 case TP_MAXINT: 1440 (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t *); 1441 break; 1442 #ifdef PRINTF_WIDE_CHAR 1443 case T_WINT: 1444 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1445 break; 1446 case TP_WCHAR: 1447 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1448 break; 1449 #endif 1450 } 1451 } 1452 goto finish; 1453 1454 overflow: 1455 errno = EOVERFLOW; 1456 ret = -1; 1457 1458 finish: 1459 if (typetable != NULL && typetable != stattypetable) { 1460 munmap(typetable, *argtablesiz); 1461 typetable = NULL; 1462 } 1463 return (ret); 1464 } 1465 1466 /* 1467 * Increase the size of the type table. 1468 */ 1469 static int 1470 __grow_type_table(unsigned char **typetable, int *tablesize) 1471 { 1472 unsigned char *oldtable = *typetable; 1473 int newsize = *tablesize * 2; 1474 1475 if (newsize < getpagesize()) 1476 newsize = getpagesize(); 1477 1478 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1479 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1480 MAP_ANON|MAP_PRIVATE, -1, 0); 1481 if (*typetable == MAP_FAILED) 1482 return (-1); 1483 bcopy(oldtable, *typetable, *tablesize); 1484 } else { 1485 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1486 MAP_ANON|MAP_PRIVATE, -1, 0); 1487 if (new == MAP_FAILED) 1488 return (-1); 1489 memmove(new, *typetable, *tablesize); 1490 munmap(*typetable, *tablesize); 1491 *typetable = new; 1492 } 1493 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1494 1495 *tablesize = newsize; 1496 return (0); 1497 } 1498 1499 1500 #ifdef FLOATING_POINT 1501 static int 1502 exponent(char *p0, int exp, int fmtch) 1503 { 1504 char *p, *t; 1505 char expbuf[MAXEXPDIG]; 1506 1507 p = p0; 1508 *p++ = fmtch; 1509 if (exp < 0) { 1510 exp = -exp; 1511 *p++ = '-'; 1512 } else 1513 *p++ = '+'; 1514 t = expbuf + MAXEXPDIG; 1515 if (exp > 9) { 1516 do { 1517 *--t = to_char(exp % 10); 1518 } while ((exp /= 10) > 9); 1519 *--t = to_char(exp); 1520 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1521 /* nothing */; 1522 } else { 1523 /* 1524 * Exponents for decimal floating point conversions 1525 * (%[eEgG]) must be at least two characters long, 1526 * whereas exponents for hexadecimal conversions can 1527 * be only one character long. 1528 */ 1529 if (fmtch == 'e' || fmtch == 'E') 1530 *p++ = '0'; 1531 *p++ = to_char(exp); 1532 } 1533 return (p - p0); 1534 } 1535 #endif /* FLOATING_POINT */ 1536