1 /* $OpenBSD: vfprintf.c,v 1.79 2020/10/27 21:06:57 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 static const char n_msg[] = ": *printf used %n: "; 60 static int n_report; 61 62 union arg { 63 int intarg; 64 unsigned int uintarg; 65 long longarg; 66 unsigned long ulongarg; 67 long long longlongarg; 68 unsigned long long ulonglongarg; 69 ptrdiff_t ptrdiffarg; 70 size_t sizearg; 71 ssize_t ssizearg; 72 intmax_t intmaxarg; 73 uintmax_t uintmaxarg; 74 void *pvoidarg; 75 char *pchararg; 76 signed char *pschararg; 77 short *pshortarg; 78 int *pintarg; 79 long *plongarg; 80 long long *plonglongarg; 81 ptrdiff_t *pptrdiffarg; 82 ssize_t *pssizearg; 83 intmax_t *pintmaxarg; 84 #ifdef FLOATING_POINT 85 double doublearg; 86 long double longdoublearg; 87 #endif 88 #ifdef PRINTF_WIDE_CHAR 89 wint_t wintarg; 90 wchar_t *pwchararg; 91 #endif 92 }; 93 94 static int __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 95 size_t *argtablesiz); 96 static int __grow_type_table(unsigned char **typetable, int *tablesize); 97 98 /* 99 * Flush out all the vectors defined by the given uio, 100 * then reset it so that it can be reused. 101 */ 102 static int 103 __sprint(FILE *fp, struct __suio *uio) 104 { 105 int err; 106 107 if (uio->uio_resid == 0) { 108 uio->uio_iovcnt = 0; 109 return (0); 110 } 111 err = __sfvwrite(fp, uio); 112 uio->uio_resid = 0; 113 uio->uio_iovcnt = 0; 114 return (err); 115 } 116 117 /* 118 * Helper function for `fprintf to unbuffered unix file': creates a 119 * temporary buffer. We only work on write-only files; this avoids 120 * worries about ungetc buffers and so forth. 121 */ 122 static int 123 __sbprintf(FILE *fp, const char *fmt, va_list ap) 124 { 125 int ret; 126 FILE fake; 127 struct __sfileext fakeext; 128 unsigned char buf[BUFSIZ]; 129 130 _FILEEXT_SETUP(&fake, &fakeext); 131 /* copy the important variables */ 132 fake._flags = fp->_flags & ~__SNBF; 133 fake._file = fp->_file; 134 fake._cookie = fp->_cookie; 135 fake._write = fp->_write; 136 137 /* set up the buffer */ 138 fake._bf._base = fake._p = buf; 139 fake._bf._size = fake._w = sizeof(buf); 140 fake._lbfsize = 0; /* not actually used, but Just In Case */ 141 142 /* do the work, then copy any error status */ 143 ret = __vfprintf(&fake, fmt, ap); 144 if (ret >= 0 && __sflush(&fake)) 145 ret = EOF; 146 if (fake._flags & __SERR) 147 fp->_flags |= __SERR; 148 return (ret); 149 } 150 151 #ifdef PRINTF_WIDE_CHAR 152 /* 153 * Convert a wide character string argument for the %ls format to a multibyte 154 * string representation. If not -1, prec specifies the maximum number of 155 * bytes to output, and also means that we can't assume that the wide char 156 * string is null-terminated. 157 */ 158 static char * 159 __wcsconv(wchar_t *wcsarg, int prec) 160 { 161 mbstate_t mbs; 162 char buf[MB_LEN_MAX]; 163 wchar_t *p; 164 char *convbuf; 165 size_t clen, nbytes; 166 167 /* Allocate space for the maximum number of bytes we could output. */ 168 if (prec < 0) { 169 memset(&mbs, 0, sizeof(mbs)); 170 p = wcsarg; 171 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs); 172 if (nbytes == (size_t)-1) 173 return (NULL); 174 } else { 175 /* 176 * Optimisation: if the output precision is small enough, 177 * just allocate enough memory for the maximum instead of 178 * scanning the string. 179 */ 180 if (prec < 128) 181 nbytes = prec; 182 else { 183 nbytes = 0; 184 p = wcsarg; 185 memset(&mbs, 0, sizeof(mbs)); 186 for (;;) { 187 clen = wcrtomb(buf, *p++, &mbs); 188 if (clen == 0 || clen == (size_t)-1 || 189 nbytes + clen > (size_t)prec) 190 break; 191 nbytes += clen; 192 } 193 if (clen == (size_t)-1) 194 return (NULL); 195 } 196 } 197 if ((convbuf = malloc(nbytes + 1)) == NULL) 198 return (NULL); 199 200 /* Fill the output buffer. */ 201 p = wcsarg; 202 memset(&mbs, 0, sizeof(mbs)); 203 if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p, 204 nbytes, &mbs)) == (size_t)-1) { 205 free(convbuf); 206 return (NULL); 207 } 208 convbuf[nbytes] = '\0'; 209 return (convbuf); 210 } 211 #endif 212 213 #ifdef FLOATING_POINT 214 #include <float.h> 215 #include <locale.h> 216 #include <math.h> 217 #include "floatio.h" 218 #include "gdtoa.h" 219 220 #define DEFPREC 6 221 222 static int exponent(char *, int, int); 223 #endif /* FLOATING_POINT */ 224 225 /* 226 * The size of the buffer we use as scratch space for integer 227 * conversions, among other things. Technically, we would need the 228 * most space for base 10 conversions with thousands' grouping 229 * characters between each pair of digits. 100 bytes is a 230 * conservative overestimate even for a 128-bit uintmax_t. 231 */ 232 #define BUF 100 233 234 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 235 236 237 /* 238 * Macros for converting digits to letters and vice versa 239 */ 240 #define to_digit(c) ((c) - '0') 241 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 242 #define to_char(n) ((n) + '0') 243 244 /* 245 * Flags used during conversion. 246 */ 247 #define ALT 0x0001 /* alternate form */ 248 #define LADJUST 0x0004 /* left adjustment */ 249 #define LONGDBL 0x0008 /* long double */ 250 #define LONGINT 0x0010 /* long integer */ 251 #define LLONGINT 0x0020 /* long long integer */ 252 #define SHORTINT 0x0040 /* short integer */ 253 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ 254 #define FPT 0x0100 /* Floating point number */ 255 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ 256 #define SIZEINT 0x0400 /* (signed) size_t */ 257 #define CHARINT 0x0800 /* 8 bit integer */ 258 #define MAXINT 0x1000 /* largest integer size (intmax_t) */ 259 260 int 261 vfprintf(FILE *fp, const char *fmt0, __va_list ap) 262 { 263 int ret; 264 265 FLOCKFILE(fp); 266 ret = __vfprintf(fp, fmt0, ap); 267 FUNLOCKFILE(fp); 268 return (ret); 269 } 270 DEF_STRONG(vfprintf); 271 272 int 273 __vfprintf(FILE *fp, const char *fmt0, __va_list ap) 274 { 275 char *fmt; /* format string */ 276 int ch; /* character from fmt */ 277 int n, n2; /* handy integers (short term usage) */ 278 char *cp; /* handy char pointer (short term usage) */ 279 struct __siov *iovp; /* for PRINT macro */ 280 int flags; /* flags as above */ 281 int ret; /* return value accumulator */ 282 int width; /* width from format (%8d), or 0 */ 283 int prec; /* precision from format; <0 for N/A */ 284 char sign; /* sign prefix (' ', '+', '-', or \0) */ 285 #ifdef FLOATING_POINT 286 /* 287 * We can decompose the printed representation of floating 288 * point numbers into several parts, some of which may be empty: 289 * 290 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 291 * A B ---C--- D E F 292 * 293 * A: 'sign' holds this value if present; '\0' otherwise 294 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 295 * C: cp points to the string MMMNNN. Leading and trailing 296 * zeros are not in the string and must be added. 297 * D: expchar holds this character; '\0' if no exponent, e.g. %f 298 * F: at least two digits for decimal, at least one digit for hex 299 */ 300 char *decimal_point = NULL; 301 int signflag; /* true if float is negative */ 302 union { /* floating point arguments %[aAeEfFgG] */ 303 double dbl; 304 long double ldbl; 305 } fparg; 306 int expt; /* integer value of exponent */ 307 char expchar; /* exponent character: [eEpP\0] */ 308 char *dtoaend; /* pointer to end of converted digits */ 309 int expsize; /* character count for expstr */ 310 int lead; /* sig figs before decimal or group sep */ 311 int ndig; /* actual number of digits returned by dtoa */ 312 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 313 char *dtoaresult = NULL; 314 #endif 315 316 uintmax_t _umax; /* integer arguments %[diouxX] */ 317 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 318 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 319 int realsz; /* field size expanded by dprec */ 320 int size; /* size of converted field or string */ 321 const char *xdigs; /* digits for %[xX] conversion */ 322 #define NIOV 8 323 struct __suio uio; /* output information: summary */ 324 struct __siov iov[NIOV];/* ... and individual io vectors */ 325 char buf[BUF]; /* buffer with space for digits of uintmax_t */ 326 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 327 union arg *argtable; /* args, built due to positional arg */ 328 union arg statargtable[STATIC_ARG_TBL_SIZE]; 329 size_t argtablesiz; 330 int nextarg; /* 1-based argument index */ 331 va_list orgap; /* original argument pointer */ 332 #ifdef PRINTF_WIDE_CHAR 333 char *convbuf; /* buffer for wide to multi-byte conversion */ 334 #endif 335 336 /* 337 * Choose PADSIZE to trade efficiency vs. size. If larger printf 338 * fields occur frequently, increase PADSIZE and make the initialisers 339 * below longer. 340 */ 341 #define PADSIZE 16 /* pad chunk size */ 342 static char blanks[PADSIZE] = 343 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 344 static char zeroes[PADSIZE] = 345 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 346 347 static const char xdigs_lower[16] = "0123456789abcdef"; 348 static const char xdigs_upper[16] = "0123456789ABCDEF"; 349 350 /* 351 * BEWARE, these `goto error' on error, and PAD uses `n'. 352 */ 353 #define PRINT(ptr, len) do { \ 354 iovp->iov_base = (ptr); \ 355 iovp->iov_len = (len); \ 356 uio.uio_resid += (len); \ 357 iovp++; \ 358 if (++uio.uio_iovcnt >= NIOV) { \ 359 if (__sprint(fp, &uio)) \ 360 goto error; \ 361 iovp = iov; \ 362 } \ 363 } while (0) 364 #define PAD(howmany, with) do { \ 365 if ((n = (howmany)) > 0) { \ 366 while (n > PADSIZE) { \ 367 PRINT(with, PADSIZE); \ 368 n -= PADSIZE; \ 369 } \ 370 PRINT(with, n); \ 371 } \ 372 } while (0) 373 #define PRINTANDPAD(p, ep, len, with) do { \ 374 n2 = (ep) - (p); \ 375 if (n2 > (len)) \ 376 n2 = (len); \ 377 if (n2 > 0) \ 378 PRINT((p), n2); \ 379 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 380 } while(0) 381 #define FLUSH() do { \ 382 if (uio.uio_resid && __sprint(fp, &uio)) \ 383 goto error; \ 384 uio.uio_iovcnt = 0; \ 385 iovp = iov; \ 386 } while (0) 387 388 /* 389 * To extend shorts properly, we need both signed and unsigned 390 * argument extraction methods. 391 */ 392 #define SARG() \ 393 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 394 flags&LLONGINT ? GETARG(long long) : \ 395 flags&LONGINT ? GETARG(long) : \ 396 flags&PTRINT ? GETARG(ptrdiff_t) : \ 397 flags&SIZEINT ? GETARG(ssize_t) : \ 398 flags&SHORTINT ? (short)GETARG(int) : \ 399 flags&CHARINT ? (signed char)GETARG(int) : \ 400 GETARG(int))) 401 #define UARG() \ 402 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 403 flags&LLONGINT ? GETARG(unsigned long long) : \ 404 flags&LONGINT ? GETARG(unsigned long) : \ 405 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 406 flags&SIZEINT ? GETARG(size_t) : \ 407 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 408 flags&CHARINT ? (unsigned char)GETARG(int) : \ 409 GETARG(unsigned int))) 410 411 /* 412 * Append a digit to a value and check for overflow. 413 */ 414 #define APPEND_DIGIT(val, dig) do { \ 415 if ((val) > INT_MAX / 10) \ 416 goto overflow; \ 417 (val) *= 10; \ 418 if ((val) > INT_MAX - to_digit((dig))) \ 419 goto overflow; \ 420 (val) += to_digit((dig)); \ 421 } while (0) 422 423 /* 424 * Get * arguments, including the form *nn$. Preserve the nextarg 425 * that the argument can be gotten once the type is determined. 426 */ 427 #define GETASTER(val) \ 428 n2 = 0; \ 429 cp = fmt; \ 430 while (is_digit(*cp)) { \ 431 APPEND_DIGIT(n2, *cp); \ 432 cp++; \ 433 } \ 434 if (*cp == '$') { \ 435 int hold = nextarg; \ 436 if (argtable == NULL) { \ 437 argtable = statargtable; \ 438 if (__find_arguments(fmt0, orgap, &argtable, \ 439 &argtablesiz) == -1) { \ 440 ret = -1; \ 441 goto error; \ 442 } \ 443 } \ 444 nextarg = n2; \ 445 val = GETARG(int); \ 446 nextarg = hold; \ 447 fmt = ++cp; \ 448 } else { \ 449 val = GETARG(int); \ 450 } 451 452 /* 453 * Get the argument indexed by nextarg. If the argument table is 454 * built, use it to get the argument. If its not, get the next 455 * argument (and arguments must be gotten sequentially). 456 */ 457 #define GETARG(type) \ 458 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 459 (nextarg++, va_arg(ap, type))) 460 461 _SET_ORIENTATION(fp, -1); 462 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ 463 if (cantwrite(fp)) { 464 errno = EBADF; 465 return (EOF); 466 } 467 468 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 469 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 470 fp->_file >= 0) 471 return (__sbprintf(fp, fmt0, ap)); 472 473 fmt = (char *)fmt0; 474 argtable = NULL; 475 nextarg = 1; 476 va_copy(orgap, ap); 477 uio.uio_iov = iovp = iov; 478 uio.uio_resid = 0; 479 uio.uio_iovcnt = 0; 480 ret = 0; 481 #ifdef PRINTF_WIDE_CHAR 482 convbuf = NULL; 483 #endif 484 485 /* 486 * Scan the format for conversions (`%' character). 487 */ 488 for (;;) { 489 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 490 continue; 491 492 if (fmt != cp) { 493 ptrdiff_t m = fmt - cp; 494 if (m < 0 || m > INT_MAX - ret) 495 goto overflow; 496 PRINT(cp, m); 497 ret += m; 498 } 499 if (ch == '\0') 500 goto done; 501 fmt++; /* skip over '%' */ 502 503 flags = 0; 504 dprec = 0; 505 width = 0; 506 prec = -1; 507 sign = '\0'; 508 ox[1] = '\0'; 509 510 rflag: ch = *fmt++; 511 reswitch: switch (ch) { 512 case ' ': 513 /* 514 * ``If the space and + flags both appear, the space 515 * flag will be ignored.'' 516 * -- ANSI X3J11 517 */ 518 if (!sign) 519 sign = ' '; 520 goto rflag; 521 case '#': 522 flags |= ALT; 523 goto rflag; 524 case '\'': 525 /* grouping not implemented */ 526 goto rflag; 527 case '*': 528 /* 529 * ``A negative field width argument is taken as a 530 * - flag followed by a positive field width.'' 531 * -- ANSI X3J11 532 * They don't exclude field widths read from args. 533 */ 534 GETASTER(width); 535 if (width >= 0) 536 goto rflag; 537 if (width == INT_MIN) 538 goto overflow; 539 width = -width; 540 /* FALLTHROUGH */ 541 case '-': 542 flags |= LADJUST; 543 goto rflag; 544 case '+': 545 sign = '+'; 546 goto rflag; 547 case '.': 548 if ((ch = *fmt++) == '*') { 549 GETASTER(n); 550 prec = n < 0 ? -1 : n; 551 goto rflag; 552 } 553 n = 0; 554 while (is_digit(ch)) { 555 APPEND_DIGIT(n, ch); 556 ch = *fmt++; 557 } 558 if (ch == '$') { 559 nextarg = n; 560 if (argtable == NULL) { 561 argtable = statargtable; 562 if (__find_arguments(fmt0, orgap, 563 &argtable, &argtablesiz) == -1) { 564 ret = -1; 565 goto error; 566 } 567 } 568 goto rflag; 569 } 570 prec = n; 571 goto reswitch; 572 case '0': 573 /* 574 * ``Note that 0 is taken as a flag, not as the 575 * beginning of a field width.'' 576 * -- ANSI X3J11 577 */ 578 flags |= ZEROPAD; 579 goto rflag; 580 case '1': case '2': case '3': case '4': 581 case '5': case '6': case '7': case '8': case '9': 582 n = 0; 583 do { 584 APPEND_DIGIT(n, ch); 585 ch = *fmt++; 586 } while (is_digit(ch)); 587 if (ch == '$') { 588 nextarg = n; 589 if (argtable == NULL) { 590 argtable = statargtable; 591 if (__find_arguments(fmt0, orgap, 592 &argtable, &argtablesiz) == -1) { 593 ret = -1; 594 goto error; 595 } 596 } 597 goto rflag; 598 } 599 width = n; 600 goto reswitch; 601 #ifdef FLOATING_POINT 602 case 'L': 603 flags |= LONGDBL; 604 goto rflag; 605 #endif 606 case 'h': 607 if (*fmt == 'h') { 608 fmt++; 609 flags |= CHARINT; 610 } else { 611 flags |= SHORTINT; 612 } 613 goto rflag; 614 case 'j': 615 flags |= MAXINT; 616 goto rflag; 617 case 'l': 618 if (*fmt == 'l') { 619 fmt++; 620 flags |= LLONGINT; 621 } else { 622 flags |= LONGINT; 623 } 624 goto rflag; 625 case 'q': 626 flags |= LLONGINT; 627 goto rflag; 628 case 't': 629 flags |= PTRINT; 630 goto rflag; 631 case 'z': 632 flags |= SIZEINT; 633 goto rflag; 634 case 'c': 635 #ifdef PRINTF_WIDE_CHAR 636 if (flags & LONGINT) { 637 mbstate_t mbs; 638 size_t mbseqlen; 639 640 memset(&mbs, 0, sizeof(mbs)); 641 mbseqlen = wcrtomb(buf, 642 (wchar_t)GETARG(wint_t), &mbs); 643 if (mbseqlen == (size_t)-1) { 644 ret = -1; 645 goto error; 646 } 647 cp = buf; 648 size = (int)mbseqlen; 649 } else { 650 #endif 651 *(cp = buf) = GETARG(int); 652 size = 1; 653 #ifdef PRINTF_WIDE_CHAR 654 } 655 #endif 656 sign = '\0'; 657 break; 658 case 'D': 659 flags |= LONGINT; 660 /*FALLTHROUGH*/ 661 case 'd': 662 case 'i': 663 _umax = SARG(); 664 if ((intmax_t)_umax < 0) { 665 _umax = -_umax; 666 sign = '-'; 667 } 668 base = DEC; 669 goto number; 670 #ifdef FLOATING_POINT 671 case 'a': 672 case 'A': 673 if (ch == 'a') { 674 ox[1] = 'x'; 675 xdigs = xdigs_lower; 676 expchar = 'p'; 677 } else { 678 ox[1] = 'X'; 679 xdigs = xdigs_upper; 680 expchar = 'P'; 681 } 682 if (prec >= 0) 683 prec++; 684 if (dtoaresult) 685 __freedtoa(dtoaresult); 686 if (flags & LONGDBL) { 687 fparg.ldbl = GETARG(long double); 688 dtoaresult = cp = 689 __hldtoa(fparg.ldbl, xdigs, prec, 690 &expt, &signflag, &dtoaend); 691 if (dtoaresult == NULL) { 692 errno = ENOMEM; 693 goto error; 694 } 695 } else { 696 fparg.dbl = GETARG(double); 697 dtoaresult = cp = 698 __hdtoa(fparg.dbl, xdigs, prec, 699 &expt, &signflag, &dtoaend); 700 if (dtoaresult == NULL) { 701 errno = ENOMEM; 702 goto error; 703 } 704 } 705 if (prec < 0) 706 prec = dtoaend - cp; 707 if (expt == INT_MAX) 708 ox[1] = '\0'; 709 goto fp_common; 710 case 'e': 711 case 'E': 712 expchar = ch; 713 if (prec < 0) /* account for digit before decpt */ 714 prec = DEFPREC + 1; 715 else 716 prec++; 717 goto fp_begin; 718 case 'f': 719 case 'F': 720 expchar = '\0'; 721 goto fp_begin; 722 case 'g': 723 case 'G': 724 expchar = ch - ('g' - 'e'); 725 if (prec == 0) 726 prec = 1; 727 fp_begin: 728 if (prec < 0) 729 prec = DEFPREC; 730 if (dtoaresult) 731 __freedtoa(dtoaresult); 732 if (flags & LONGDBL) { 733 fparg.ldbl = GETARG(long double); 734 dtoaresult = cp = 735 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 736 &expt, &signflag, &dtoaend); 737 if (dtoaresult == NULL) { 738 errno = ENOMEM; 739 goto error; 740 } 741 } else { 742 fparg.dbl = GETARG(double); 743 dtoaresult = cp = 744 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 745 &expt, &signflag, &dtoaend); 746 if (dtoaresult == NULL) { 747 errno = ENOMEM; 748 goto error; 749 } 750 if (expt == 9999) 751 expt = INT_MAX; 752 } 753 fp_common: 754 if (signflag) 755 sign = '-'; 756 if (expt == INT_MAX) { /* inf or nan */ 757 if (*cp == 'N') 758 cp = (ch >= 'a') ? "nan" : "NAN"; 759 else 760 cp = (ch >= 'a') ? "inf" : "INF"; 761 size = 3; 762 flags &= ~ZEROPAD; 763 break; 764 } 765 flags |= FPT; 766 ndig = dtoaend - cp; 767 if (ch == 'g' || ch == 'G') { 768 if (expt > -4 && expt <= prec) { 769 /* Make %[gG] smell like %[fF] */ 770 expchar = '\0'; 771 if (flags & ALT) 772 prec -= expt; 773 else 774 prec = ndig - expt; 775 if (prec < 0) 776 prec = 0; 777 } else { 778 /* 779 * Make %[gG] smell like %[eE], but 780 * trim trailing zeroes if no # flag. 781 */ 782 if (!(flags & ALT)) 783 prec = ndig; 784 } 785 } 786 if (expchar) { 787 expsize = exponent(expstr, expt - 1, expchar); 788 size = expsize + prec; 789 if (prec > 1 || flags & ALT) 790 ++size; 791 } else { 792 /* space for digits before decimal point */ 793 if (expt > 0) 794 size = expt; 795 else /* "0" */ 796 size = 1; 797 /* space for decimal pt and following digits */ 798 if (prec || flags & ALT) 799 size += prec + 1; 800 lead = expt; 801 } 802 break; 803 #endif /* FLOATING_POINT */ 804 #ifndef NO_PRINTF_PERCENT_N 805 case 'n': { 806 int maxprot = 0; 807 808 #ifdef notyet 809 if (mprotections(fmt0, strlen(fmt0) + 1, 810 &maxprot) == -1) 811 maxprot = 0; 812 maxprot &= ~PROT_READ; 813 #endif 814 815 if (n_report == 0 || maxprot) { 816 char buf[1024], *p; 817 818 /* <10> is LOG_CRIT */ 819 strlcpy(buf, "<10>", sizeof buf); 820 821 /* XXX */ 822 if ((p = getenv("_THIS_PORT")) != NULL) { 823 strlcat(buf, p, sizeof buf); 824 strlcat(buf, " ", sizeof buf); 825 } 826 827 /* Make sure progname does not fill the whole buffer */ 828 strlcat(buf, __progname, sizeof(buf) - sizeof n_msg); 829 strlcat(buf, n_msg, sizeof buf); 830 strlcat(buf, fmt0, sizeof buf); 831 if ((p = strchr(buf, '\n'))) 832 *p = '\0'; 833 if (maxprot) 834 strlcat(buf, ": aborting", sizeof buf); 835 sendsyslog(buf, strlen(buf), LOG_CONS); 836 n_report = 1; 837 } 838 839 if (maxprot) 840 abort(); 841 842 if (flags & LLONGINT) 843 *GETARG(long long *) = ret; 844 else if (flags & LONGINT) 845 *GETARG(long *) = ret; 846 else if (flags & SHORTINT) 847 *GETARG(short *) = ret; 848 else if (flags & CHARINT) 849 *GETARG(signed char *) = ret; 850 else if (flags & PTRINT) 851 *GETARG(ptrdiff_t *) = ret; 852 else if (flags & SIZEINT) 853 *GETARG(ssize_t *) = ret; 854 else if (flags & MAXINT) 855 *GETARG(intmax_t *) = ret; 856 else 857 *GETARG(int *) = ret; 858 continue; /* no output */ 859 } 860 #endif /* NO_PRINTF_PERCENT_N */ 861 case 'O': 862 flags |= LONGINT; 863 /*FALLTHROUGH*/ 864 case 'o': 865 _umax = UARG(); 866 base = OCT; 867 goto nosign; 868 case 'p': 869 /* 870 * ``The argument shall be a pointer to void. The 871 * value of the pointer is converted to a sequence 872 * of printable characters, in an implementation- 873 * defined manner.'' 874 * -- ANSI X3J11 875 */ 876 _umax = (u_long)GETARG(void *); 877 base = HEX; 878 xdigs = xdigs_lower; 879 ox[1] = 'x'; 880 goto nosign; 881 case 's': { 882 size_t len; 883 884 #ifdef PRINTF_WIDE_CHAR 885 if (flags & LONGINT) { 886 wchar_t *wcp; 887 888 free(convbuf); 889 convbuf = NULL; 890 if ((wcp = GETARG(wchar_t *)) == NULL) { 891 struct syslog_data sdata = SYSLOG_DATA_INIT; 892 int save_errno = errno; 893 894 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 895 "vfprintf %%ls NULL in \"%s\"", fmt0); 896 errno = save_errno; 897 898 cp = "(null)"; 899 } else { 900 convbuf = __wcsconv(wcp, prec); 901 if (convbuf == NULL) { 902 ret = -1; 903 goto error; 904 } 905 cp = convbuf; 906 } 907 } else 908 #endif /* PRINTF_WIDE_CHAR */ 909 910 if ((cp = GETARG(char *)) == NULL) { 911 struct syslog_data sdata = SYSLOG_DATA_INIT; 912 int save_errno = errno; 913 914 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 915 "vfprintf %%s NULL in \"%s\"", fmt0); 916 errno = save_errno; 917 918 cp = "(null)"; 919 } 920 len = prec >= 0 ? strnlen(cp, prec) : strlen(cp); 921 if (len > INT_MAX) 922 goto overflow; 923 size = (int)len; 924 sign = '\0'; 925 } 926 break; 927 case 'U': 928 flags |= LONGINT; 929 /*FALLTHROUGH*/ 930 case 'u': 931 _umax = UARG(); 932 base = DEC; 933 goto nosign; 934 case 'X': 935 xdigs = xdigs_upper; 936 goto hex; 937 case 'x': 938 xdigs = xdigs_lower; 939 hex: _umax = UARG(); 940 base = HEX; 941 /* leading 0x/X only if non-zero */ 942 if (flags & ALT && _umax != 0) 943 ox[1] = ch; 944 945 /* unsigned conversions */ 946 nosign: sign = '\0'; 947 /* 948 * ``... diouXx conversions ... if a precision is 949 * specified, the 0 flag will be ignored.'' 950 * -- ANSI X3J11 951 */ 952 number: if ((dprec = prec) >= 0) 953 flags &= ~ZEROPAD; 954 955 /* 956 * ``The result of converting a zero value with an 957 * explicit precision of zero is no characters.'' 958 * -- ANSI X3J11 959 */ 960 cp = buf + BUF; 961 if (_umax != 0 || prec != 0) { 962 /* 963 * Unsigned mod is hard, and unsigned mod 964 * by a constant is easier than that by 965 * a variable; hence this switch. 966 */ 967 switch (base) { 968 case OCT: 969 do { 970 *--cp = to_char(_umax & 7); 971 _umax >>= 3; 972 } while (_umax); 973 /* handle octal leading 0 */ 974 if (flags & ALT && *cp != '0') 975 *--cp = '0'; 976 break; 977 978 case DEC: 979 /* many numbers are 1 digit */ 980 while (_umax >= 10) { 981 *--cp = to_char(_umax % 10); 982 _umax /= 10; 983 } 984 *--cp = to_char(_umax); 985 break; 986 987 case HEX: 988 do { 989 *--cp = xdigs[_umax & 15]; 990 _umax >>= 4; 991 } while (_umax); 992 break; 993 994 default: 995 cp = "bug in vfprintf: bad base"; 996 size = strlen(cp); 997 goto skipsize; 998 } 999 } 1000 size = buf + BUF - cp; 1001 if (size > BUF) /* should never happen */ 1002 abort(); 1003 skipsize: 1004 break; 1005 default: /* "%?" prints ?, unless ? is NUL */ 1006 if (ch == '\0') 1007 goto done; 1008 /* pretend it was %c with argument ch */ 1009 cp = buf; 1010 *cp = ch; 1011 size = 1; 1012 sign = '\0'; 1013 break; 1014 } 1015 1016 /* 1017 * All reasonable formats wind up here. At this point, `cp' 1018 * points to a string which (if not flags&LADJUST) should be 1019 * padded out to `width' places. If flags&ZEROPAD, it should 1020 * first be prefixed by any sign or other prefix; otherwise, 1021 * it should be blank padded before the prefix is emitted. 1022 * After any left-hand padding and prefixing, emit zeroes 1023 * required by a decimal %[diouxX] precision, then print the 1024 * string proper, then emit zeroes required by any leftover 1025 * floating precision; finally, if LADJUST, pad with blanks. 1026 * 1027 * Compute actual size, so we know how much to pad. 1028 * size excludes decimal prec; realsz includes it. 1029 */ 1030 realsz = dprec > size ? dprec : size; 1031 if (sign) 1032 realsz++; 1033 if (ox[1]) 1034 realsz+= 2; 1035 1036 /* right-adjusting blank padding */ 1037 if ((flags & (LADJUST|ZEROPAD)) == 0) 1038 PAD(width - realsz, blanks); 1039 1040 /* prefix */ 1041 if (sign) 1042 PRINT(&sign, 1); 1043 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1044 ox[0] = '0'; 1045 PRINT(ox, 2); 1046 } 1047 1048 /* right-adjusting zero padding */ 1049 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1050 PAD(width - realsz, zeroes); 1051 1052 /* leading zeroes from decimal precision */ 1053 PAD(dprec - size, zeroes); 1054 1055 /* the string or number proper */ 1056 #ifdef FLOATING_POINT 1057 if ((flags & FPT) == 0) { 1058 PRINT(cp, size); 1059 } else { /* glue together f_p fragments */ 1060 if (decimal_point == NULL) 1061 decimal_point = nl_langinfo(RADIXCHAR); 1062 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1063 if (expt <= 0) { 1064 PRINT(zeroes, 1); 1065 if (prec || flags & ALT) 1066 PRINT(decimal_point, 1); 1067 PAD(-expt, zeroes); 1068 /* already handled initial 0's */ 1069 prec += expt; 1070 } else { 1071 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1072 cp += lead; 1073 if (prec || flags & ALT) 1074 PRINT(decimal_point, 1); 1075 } 1076 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1077 } else { /* %[eE] or sufficiently long %[gG] */ 1078 if (prec > 1 || flags & ALT) { 1079 buf[0] = *cp++; 1080 buf[1] = *decimal_point; 1081 PRINT(buf, 2); 1082 PRINT(cp, ndig-1); 1083 PAD(prec - ndig, zeroes); 1084 } else { /* XeYYY */ 1085 PRINT(cp, 1); 1086 } 1087 PRINT(expstr, expsize); 1088 } 1089 } 1090 #else 1091 PRINT(cp, size); 1092 #endif 1093 /* left-adjusting padding (always blank) */ 1094 if (flags & LADJUST) 1095 PAD(width - realsz, blanks); 1096 1097 /* finally, adjust ret */ 1098 if (width < realsz) 1099 width = realsz; 1100 if (width > INT_MAX - ret) 1101 goto overflow; 1102 ret += width; 1103 1104 FLUSH(); /* copy out the I/O vectors */ 1105 } 1106 done: 1107 FLUSH(); 1108 error: 1109 va_end(orgap); 1110 if (__sferror(fp)) 1111 ret = -1; 1112 goto finish; 1113 1114 overflow: 1115 errno = EOVERFLOW; 1116 ret = -1; 1117 1118 finish: 1119 #ifdef PRINTF_WIDE_CHAR 1120 free(convbuf); 1121 #endif 1122 #ifdef FLOATING_POINT 1123 if (dtoaresult) 1124 __freedtoa(dtoaresult); 1125 #endif 1126 if (argtable != NULL && argtable != statargtable) { 1127 munmap(argtable, argtablesiz); 1128 argtable = NULL; 1129 } 1130 return (ret); 1131 } 1132 1133 /* 1134 * Type ids for argument type table. 1135 */ 1136 #define T_UNUSED 0 1137 #define T_SHORT 1 1138 #define T_U_SHORT 2 1139 #define TP_SHORT 3 1140 #define T_INT 4 1141 #define T_U_INT 5 1142 #define TP_INT 6 1143 #define T_LONG 7 1144 #define T_U_LONG 8 1145 #define TP_LONG 9 1146 #define T_LLONG 10 1147 #define T_U_LLONG 11 1148 #define TP_LLONG 12 1149 #define T_DOUBLE 13 1150 #define T_LONG_DOUBLE 14 1151 #define TP_CHAR 15 1152 #define TP_VOID 16 1153 #define T_PTRINT 17 1154 #define TP_PTRINT 18 1155 #define T_SIZEINT 19 1156 #define T_SSIZEINT 20 1157 #define TP_SSIZEINT 21 1158 #define T_MAXINT 22 1159 #define T_MAXUINT 23 1160 #define TP_MAXINT 24 1161 #define T_CHAR 25 1162 #define T_U_CHAR 26 1163 #define T_WINT 27 1164 #define TP_WCHAR 28 1165 1166 /* 1167 * Find all arguments when a positional parameter is encountered. Returns a 1168 * table, indexed by argument number, of pointers to each arguments. The 1169 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1170 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1171 * used since we are attempting to make snprintf thread safe, and alloca is 1172 * problematic since we have nested functions..) 1173 */ 1174 static int 1175 __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1176 size_t *argtablesiz) 1177 { 1178 char *fmt; /* format string */ 1179 int ch; /* character from fmt */ 1180 int n, n2; /* handy integer (short term usage) */ 1181 char *cp; /* handy char pointer (short term usage) */ 1182 int flags; /* flags as above */ 1183 unsigned char *typetable; /* table of types */ 1184 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1185 int tablesize; /* current size of type table */ 1186 int tablemax; /* largest used index in table */ 1187 int nextarg; /* 1-based argument index */ 1188 int ret = 0; /* return value */ 1189 1190 /* 1191 * Add an argument type to the table, expanding if necessary. 1192 */ 1193 #define ADDTYPE(type) \ 1194 ((nextarg >= tablesize) ? \ 1195 __grow_type_table(&typetable, &tablesize) : 0, \ 1196 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1197 typetable[nextarg++] = type) 1198 1199 #define ADDSARG() \ 1200 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1201 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1202 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1203 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1204 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1205 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1206 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1207 1208 #define ADDUARG() \ 1209 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1210 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1211 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1212 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1213 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1214 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1215 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1216 1217 /* 1218 * Add * arguments to the type array. 1219 */ 1220 #define ADDASTER() \ 1221 n2 = 0; \ 1222 cp = fmt; \ 1223 while (is_digit(*cp)) { \ 1224 APPEND_DIGIT(n2, *cp); \ 1225 cp++; \ 1226 } \ 1227 if (*cp == '$') { \ 1228 int hold = nextarg; \ 1229 nextarg = n2; \ 1230 ADDTYPE(T_INT); \ 1231 nextarg = hold; \ 1232 fmt = ++cp; \ 1233 } else { \ 1234 ADDTYPE(T_INT); \ 1235 } 1236 fmt = (char *)fmt0; 1237 typetable = stattypetable; 1238 tablesize = STATIC_ARG_TBL_SIZE; 1239 tablemax = 0; 1240 nextarg = 1; 1241 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1242 1243 /* 1244 * Scan the format for conversions (`%' character). 1245 */ 1246 for (;;) { 1247 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1248 continue; 1249 if (ch == '\0') 1250 goto done; 1251 fmt++; /* skip over '%' */ 1252 1253 flags = 0; 1254 1255 rflag: ch = *fmt++; 1256 reswitch: switch (ch) { 1257 case ' ': 1258 case '#': 1259 case '\'': 1260 goto rflag; 1261 case '*': 1262 ADDASTER(); 1263 goto rflag; 1264 case '-': 1265 case '+': 1266 goto rflag; 1267 case '.': 1268 if ((ch = *fmt++) == '*') { 1269 ADDASTER(); 1270 goto rflag; 1271 } 1272 while (is_digit(ch)) { 1273 ch = *fmt++; 1274 } 1275 goto reswitch; 1276 case '0': 1277 goto rflag; 1278 case '1': case '2': case '3': case '4': 1279 case '5': case '6': case '7': case '8': case '9': 1280 n = 0; 1281 do { 1282 APPEND_DIGIT(n ,ch); 1283 ch = *fmt++; 1284 } while (is_digit(ch)); 1285 if (ch == '$') { 1286 nextarg = n; 1287 goto rflag; 1288 } 1289 goto reswitch; 1290 #ifdef FLOATING_POINT 1291 case 'L': 1292 flags |= LONGDBL; 1293 goto rflag; 1294 #endif 1295 case 'h': 1296 if (*fmt == 'h') { 1297 fmt++; 1298 flags |= CHARINT; 1299 } else { 1300 flags |= SHORTINT; 1301 } 1302 goto rflag; 1303 case 'j': 1304 flags |= MAXINT; 1305 goto rflag; 1306 case 'l': 1307 if (*fmt == 'l') { 1308 fmt++; 1309 flags |= LLONGINT; 1310 } else { 1311 flags |= LONGINT; 1312 } 1313 goto rflag; 1314 case 'q': 1315 flags |= LLONGINT; 1316 goto rflag; 1317 case 't': 1318 flags |= PTRINT; 1319 goto rflag; 1320 case 'z': 1321 flags |= SIZEINT; 1322 goto rflag; 1323 case 'c': 1324 #ifdef PRINTF_WIDE_CHAR 1325 if (flags & LONGINT) 1326 ADDTYPE(T_WINT); 1327 else 1328 #endif 1329 ADDTYPE(T_INT); 1330 break; 1331 case 'D': 1332 flags |= LONGINT; 1333 /*FALLTHROUGH*/ 1334 case 'd': 1335 case 'i': 1336 ADDSARG(); 1337 break; 1338 #ifdef FLOATING_POINT 1339 case 'a': 1340 case 'A': 1341 case 'e': 1342 case 'E': 1343 case 'f': 1344 case 'F': 1345 case 'g': 1346 case 'G': 1347 if (flags & LONGDBL) 1348 ADDTYPE(T_LONG_DOUBLE); 1349 else 1350 ADDTYPE(T_DOUBLE); 1351 break; 1352 #endif /* FLOATING_POINT */ 1353 #ifndef NO_PRINTF_PERCENT_N 1354 case 'n': 1355 if (flags & LLONGINT) 1356 ADDTYPE(TP_LLONG); 1357 else if (flags & LONGINT) 1358 ADDTYPE(TP_LONG); 1359 else if (flags & SHORTINT) 1360 ADDTYPE(TP_SHORT); 1361 else if (flags & PTRINT) 1362 ADDTYPE(TP_PTRINT); 1363 else if (flags & SIZEINT) 1364 ADDTYPE(TP_SSIZEINT); 1365 else if (flags & MAXINT) 1366 ADDTYPE(TP_MAXINT); 1367 else 1368 ADDTYPE(TP_INT); 1369 continue; /* no output */ 1370 #endif /* NO_PRINTF_PERCENT_N */ 1371 case 'O': 1372 flags |= LONGINT; 1373 /*FALLTHROUGH*/ 1374 case 'o': 1375 ADDUARG(); 1376 break; 1377 case 'p': 1378 ADDTYPE(TP_VOID); 1379 break; 1380 case 's': 1381 #ifdef PRINTF_WIDE_CHAR 1382 if (flags & LONGINT) 1383 ADDTYPE(TP_WCHAR); 1384 else 1385 #endif 1386 ADDTYPE(TP_CHAR); 1387 break; 1388 case 'U': 1389 flags |= LONGINT; 1390 /*FALLTHROUGH*/ 1391 case 'u': 1392 case 'X': 1393 case 'x': 1394 ADDUARG(); 1395 break; 1396 default: /* "%?" prints ?, unless ? is NUL */ 1397 if (ch == '\0') 1398 goto done; 1399 break; 1400 } 1401 } 1402 done: 1403 /* 1404 * Build the argument table. 1405 */ 1406 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1407 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1408 *argtable = mmap(NULL, *argtablesiz, 1409 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1410 if (*argtable == MAP_FAILED) 1411 return (-1); 1412 } 1413 1414 for (n = 1; n <= tablemax; n++) { 1415 switch (typetable[n]) { 1416 case T_UNUSED: 1417 case T_CHAR: 1418 case T_U_CHAR: 1419 case T_SHORT: 1420 case T_U_SHORT: 1421 case T_INT: 1422 (*argtable)[n].intarg = va_arg(ap, int); 1423 break; 1424 case TP_SHORT: 1425 (*argtable)[n].pshortarg = va_arg(ap, short *); 1426 break; 1427 case T_U_INT: 1428 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1429 break; 1430 case TP_INT: 1431 (*argtable)[n].pintarg = va_arg(ap, int *); 1432 break; 1433 case T_LONG: 1434 (*argtable)[n].longarg = va_arg(ap, long); 1435 break; 1436 case T_U_LONG: 1437 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1438 break; 1439 case TP_LONG: 1440 (*argtable)[n].plongarg = va_arg(ap, long *); 1441 break; 1442 case T_LLONG: 1443 (*argtable)[n].longlongarg = va_arg(ap, long long); 1444 break; 1445 case T_U_LLONG: 1446 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1447 break; 1448 case TP_LLONG: 1449 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1450 break; 1451 #ifdef FLOATING_POINT 1452 case T_DOUBLE: 1453 (*argtable)[n].doublearg = va_arg(ap, double); 1454 break; 1455 case T_LONG_DOUBLE: 1456 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1457 break; 1458 #endif 1459 case TP_CHAR: 1460 (*argtable)[n].pchararg = va_arg(ap, char *); 1461 break; 1462 case TP_VOID: 1463 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1464 break; 1465 case T_PTRINT: 1466 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1467 break; 1468 case TP_PTRINT: 1469 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1470 break; 1471 case T_SIZEINT: 1472 (*argtable)[n].sizearg = va_arg(ap, size_t); 1473 break; 1474 case T_SSIZEINT: 1475 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1476 break; 1477 case TP_SSIZEINT: 1478 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1479 break; 1480 case T_MAXINT: 1481 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1482 break; 1483 case T_MAXUINT: 1484 (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t); 1485 break; 1486 case TP_MAXINT: 1487 (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t *); 1488 break; 1489 #ifdef PRINTF_WIDE_CHAR 1490 case T_WINT: 1491 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1492 break; 1493 case TP_WCHAR: 1494 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1495 break; 1496 #endif 1497 } 1498 } 1499 goto finish; 1500 1501 overflow: 1502 errno = EOVERFLOW; 1503 ret = -1; 1504 1505 finish: 1506 if (typetable != NULL && typetable != stattypetable) { 1507 munmap(typetable, *argtablesiz); 1508 typetable = NULL; 1509 } 1510 return (ret); 1511 } 1512 1513 /* 1514 * Increase the size of the type table. 1515 */ 1516 static int 1517 __grow_type_table(unsigned char **typetable, int *tablesize) 1518 { 1519 unsigned char *oldtable = *typetable; 1520 int newsize = *tablesize * 2; 1521 1522 if (newsize < getpagesize()) 1523 newsize = getpagesize(); 1524 1525 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1526 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1527 MAP_ANON|MAP_PRIVATE, -1, 0); 1528 if (*typetable == MAP_FAILED) 1529 return (-1); 1530 bcopy(oldtable, *typetable, *tablesize); 1531 } else { 1532 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1533 MAP_ANON|MAP_PRIVATE, -1, 0); 1534 if (new == MAP_FAILED) 1535 return (-1); 1536 memmove(new, *typetable, *tablesize); 1537 munmap(*typetable, *tablesize); 1538 *typetable = new; 1539 } 1540 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1541 1542 *tablesize = newsize; 1543 return (0); 1544 } 1545 1546 1547 #ifdef FLOATING_POINT 1548 static int 1549 exponent(char *p0, int exp, int fmtch) 1550 { 1551 char *p, *t; 1552 char expbuf[MAXEXPDIG]; 1553 1554 p = p0; 1555 *p++ = fmtch; 1556 if (exp < 0) { 1557 exp = -exp; 1558 *p++ = '-'; 1559 } else 1560 *p++ = '+'; 1561 t = expbuf + MAXEXPDIG; 1562 if (exp > 9) { 1563 do { 1564 *--t = to_char(exp % 10); 1565 } while ((exp /= 10) > 9); 1566 *--t = to_char(exp); 1567 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1568 /* nothing */; 1569 } else { 1570 /* 1571 * Exponents for decimal floating point conversions 1572 * (%[eEgG]) must be at least two characters long, 1573 * whereas exponents for hexadecimal conversions can 1574 * be only one character long. 1575 */ 1576 if (fmtch == 'e' || fmtch == 'E') 1577 *p++ = '0'; 1578 *p++ = to_char(exp); 1579 } 1580 return (p - p0); 1581 } 1582 #endif /* FLOATING_POINT */ 1583