1 /* $OpenBSD: vfprintf.c,v 1.77 2016/08/29 12:20:57 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 wchar_t wc; 283 mbstate_t ps; 284 #ifdef FLOATING_POINT 285 /* 286 * We can decompose the printed representation of floating 287 * point numbers into several parts, some of which may be empty: 288 * 289 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 290 * A B ---C--- D E F 291 * 292 * A: 'sign' holds this value if present; '\0' otherwise 293 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 294 * C: cp points to the string MMMNNN. Leading and trailing 295 * zeros are not in the string and must be added. 296 * D: expchar holds this character; '\0' if no exponent, e.g. %f 297 * F: at least two digits for decimal, at least one digit for hex 298 */ 299 char *decimal_point = NULL; 300 int signflag; /* true if float is negative */ 301 union { /* floating point arguments %[aAeEfFgG] */ 302 double dbl; 303 long double ldbl; 304 } fparg; 305 int expt; /* integer value of exponent */ 306 char expchar; /* exponent character: [eEpP\0] */ 307 char *dtoaend; /* pointer to end of converted digits */ 308 int expsize; /* character count for expstr */ 309 int lead; /* sig figs before decimal or group sep */ 310 int ndig; /* actual number of digits returned by dtoa */ 311 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 312 char *dtoaresult = NULL; 313 #endif 314 315 uintmax_t _umax; /* integer arguments %[diouxX] */ 316 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 317 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 318 int realsz; /* field size expanded by dprec */ 319 int size; /* size of converted field or string */ 320 const char *xdigs; /* digits for %[xX] conversion */ 321 #define NIOV 8 322 struct __suio uio; /* output information: summary */ 323 struct __siov iov[NIOV];/* ... and individual io vectors */ 324 char buf[BUF]; /* buffer with space for digits of uintmax_t */ 325 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 326 union arg *argtable; /* args, built due to positional arg */ 327 union arg statargtable[STATIC_ARG_TBL_SIZE]; 328 size_t argtablesiz; 329 int nextarg; /* 1-based argument index */ 330 va_list orgap; /* original argument pointer */ 331 #ifdef PRINTF_WIDE_CHAR 332 char *convbuf; /* buffer for wide to multi-byte conversion */ 333 #endif 334 335 /* 336 * Choose PADSIZE to trade efficiency vs. size. If larger printf 337 * fields occur frequently, increase PADSIZE and make the initialisers 338 * below longer. 339 */ 340 #define PADSIZE 16 /* pad chunk size */ 341 static char blanks[PADSIZE] = 342 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 343 static char zeroes[PADSIZE] = 344 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 345 346 static const char xdigs_lower[16] = "0123456789abcdef"; 347 static const char xdigs_upper[16] = "0123456789ABCDEF"; 348 349 /* 350 * BEWARE, these `goto error' on error, and PAD uses `n'. 351 */ 352 #define PRINT(ptr, len) do { \ 353 iovp->iov_base = (ptr); \ 354 iovp->iov_len = (len); \ 355 uio.uio_resid += (len); \ 356 iovp++; \ 357 if (++uio.uio_iovcnt >= NIOV) { \ 358 if (__sprint(fp, &uio)) \ 359 goto error; \ 360 iovp = iov; \ 361 } \ 362 } while (0) 363 #define PAD(howmany, with) do { \ 364 if ((n = (howmany)) > 0) { \ 365 while (n > PADSIZE) { \ 366 PRINT(with, PADSIZE); \ 367 n -= PADSIZE; \ 368 } \ 369 PRINT(with, n); \ 370 } \ 371 } while (0) 372 #define PRINTANDPAD(p, ep, len, with) do { \ 373 n2 = (ep) - (p); \ 374 if (n2 > (len)) \ 375 n2 = (len); \ 376 if (n2 > 0) \ 377 PRINT((p), n2); \ 378 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 379 } while(0) 380 #define FLUSH() do { \ 381 if (uio.uio_resid && __sprint(fp, &uio)) \ 382 goto error; \ 383 uio.uio_iovcnt = 0; \ 384 iovp = iov; \ 385 } while (0) 386 387 /* 388 * To extend shorts properly, we need both signed and unsigned 389 * argument extraction methods. 390 */ 391 #define SARG() \ 392 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 393 flags&LLONGINT ? GETARG(long long) : \ 394 flags&LONGINT ? GETARG(long) : \ 395 flags&PTRINT ? GETARG(ptrdiff_t) : \ 396 flags&SIZEINT ? GETARG(ssize_t) : \ 397 flags&SHORTINT ? (short)GETARG(int) : \ 398 flags&CHARINT ? (signed char)GETARG(int) : \ 399 GETARG(int))) 400 #define UARG() \ 401 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 402 flags&LLONGINT ? GETARG(unsigned long long) : \ 403 flags&LONGINT ? GETARG(unsigned long) : \ 404 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 405 flags&SIZEINT ? GETARG(size_t) : \ 406 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 407 flags&CHARINT ? (unsigned char)GETARG(int) : \ 408 GETARG(unsigned int))) 409 410 /* 411 * Append a digit to a value and check for overflow. 412 */ 413 #define APPEND_DIGIT(val, dig) do { \ 414 if ((val) > INT_MAX / 10) \ 415 goto overflow; \ 416 (val) *= 10; \ 417 if ((val) > INT_MAX - to_digit((dig))) \ 418 goto overflow; \ 419 (val) += to_digit((dig)); \ 420 } while (0) 421 422 /* 423 * Get * arguments, including the form *nn$. Preserve the nextarg 424 * that the argument can be gotten once the type is determined. 425 */ 426 #define GETASTER(val) \ 427 n2 = 0; \ 428 cp = fmt; \ 429 while (is_digit(*cp)) { \ 430 APPEND_DIGIT(n2, *cp); \ 431 cp++; \ 432 } \ 433 if (*cp == '$') { \ 434 int hold = nextarg; \ 435 if (argtable == NULL) { \ 436 argtable = statargtable; \ 437 if (__find_arguments(fmt0, orgap, &argtable, \ 438 &argtablesiz) == -1) { \ 439 ret = -1; \ 440 goto error; \ 441 } \ 442 } \ 443 nextarg = n2; \ 444 val = GETARG(int); \ 445 nextarg = hold; \ 446 fmt = ++cp; \ 447 } else { \ 448 val = GETARG(int); \ 449 } 450 451 /* 452 * Get the argument indexed by nextarg. If the argument table is 453 * built, use it to get the argument. If its not, get the next 454 * argument (and arguments must be gotten sequentially). 455 */ 456 #define GETARG(type) \ 457 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 458 (nextarg++, va_arg(ap, type))) 459 460 _SET_ORIENTATION(fp, -1); 461 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ 462 if (cantwrite(fp)) { 463 errno = EBADF; 464 return (EOF); 465 } 466 467 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 468 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 469 fp->_file >= 0) 470 return (__sbprintf(fp, fmt0, ap)); 471 472 fmt = (char *)fmt0; 473 argtable = NULL; 474 nextarg = 1; 475 va_copy(orgap, ap); 476 uio.uio_iov = iovp = iov; 477 uio.uio_resid = 0; 478 uio.uio_iovcnt = 0; 479 ret = 0; 480 #ifdef PRINTF_WIDE_CHAR 481 convbuf = NULL; 482 #endif 483 484 memset(&ps, 0, sizeof(ps)); 485 /* 486 * Scan the format for conversions (`%' character). 487 */ 488 for (;;) { 489 size_t len; 490 491 cp = fmt; 492 while ((len = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) != 0) { 493 if (len == (size_t)-1 || len == (size_t)-2) { 494 ret = -1; 495 goto error; 496 } 497 fmt += len; 498 if (wc == '%') { 499 fmt--; 500 break; 501 } 502 } 503 if (fmt != cp) { 504 ptrdiff_t m = fmt - cp; 505 if (m < 0 || m > INT_MAX - ret) 506 goto overflow; 507 PRINT(cp, m); 508 ret += m; 509 } 510 if (len == 0) 511 goto done; 512 fmt++; /* skip over '%' */ 513 514 flags = 0; 515 dprec = 0; 516 width = 0; 517 prec = -1; 518 sign = '\0'; 519 ox[1] = '\0'; 520 521 rflag: ch = *fmt++; 522 reswitch: switch (ch) { 523 case ' ': 524 /* 525 * ``If the space and + flags both appear, the space 526 * flag will be ignored.'' 527 * -- ANSI X3J11 528 */ 529 if (!sign) 530 sign = ' '; 531 goto rflag; 532 case '#': 533 flags |= ALT; 534 goto rflag; 535 case '\'': 536 /* grouping not implemented */ 537 goto rflag; 538 case '*': 539 /* 540 * ``A negative field width argument is taken as a 541 * - flag followed by a positive field width.'' 542 * -- ANSI X3J11 543 * They don't exclude field widths read from args. 544 */ 545 GETASTER(width); 546 if (width >= 0) 547 goto rflag; 548 if (width == INT_MIN) 549 goto overflow; 550 width = -width; 551 /* FALLTHROUGH */ 552 case '-': 553 flags |= LADJUST; 554 goto rflag; 555 case '+': 556 sign = '+'; 557 goto rflag; 558 case '.': 559 if ((ch = *fmt++) == '*') { 560 GETASTER(n); 561 prec = n < 0 ? -1 : n; 562 goto rflag; 563 } 564 n = 0; 565 while (is_digit(ch)) { 566 APPEND_DIGIT(n, ch); 567 ch = *fmt++; 568 } 569 if (ch == '$') { 570 nextarg = n; 571 if (argtable == NULL) { 572 argtable = statargtable; 573 if (__find_arguments(fmt0, orgap, 574 &argtable, &argtablesiz) == -1) { 575 ret = -1; 576 goto error; 577 } 578 } 579 goto rflag; 580 } 581 prec = n; 582 goto reswitch; 583 case '0': 584 /* 585 * ``Note that 0 is taken as a flag, not as the 586 * beginning of a field width.'' 587 * -- ANSI X3J11 588 */ 589 flags |= ZEROPAD; 590 goto rflag; 591 case '1': case '2': case '3': case '4': 592 case '5': case '6': case '7': case '8': case '9': 593 n = 0; 594 do { 595 APPEND_DIGIT(n, ch); 596 ch = *fmt++; 597 } while (is_digit(ch)); 598 if (ch == '$') { 599 nextarg = n; 600 if (argtable == NULL) { 601 argtable = statargtable; 602 if (__find_arguments(fmt0, orgap, 603 &argtable, &argtablesiz) == -1) { 604 ret = -1; 605 goto error; 606 } 607 } 608 goto rflag; 609 } 610 width = n; 611 goto reswitch; 612 #ifdef FLOATING_POINT 613 case 'L': 614 flags |= LONGDBL; 615 goto rflag; 616 #endif 617 case 'h': 618 if (*fmt == 'h') { 619 fmt++; 620 flags |= CHARINT; 621 } else { 622 flags |= SHORTINT; 623 } 624 goto rflag; 625 case 'j': 626 flags |= MAXINT; 627 goto rflag; 628 case 'l': 629 if (*fmt == 'l') { 630 fmt++; 631 flags |= LLONGINT; 632 } else { 633 flags |= LONGINT; 634 } 635 goto rflag; 636 case 'q': 637 flags |= LLONGINT; 638 goto rflag; 639 case 't': 640 flags |= PTRINT; 641 goto rflag; 642 case 'z': 643 flags |= SIZEINT; 644 goto rflag; 645 case 'c': 646 #ifdef PRINTF_WIDE_CHAR 647 if (flags & LONGINT) { 648 mbstate_t mbs; 649 size_t mbseqlen; 650 651 memset(&mbs, 0, sizeof(mbs)); 652 mbseqlen = wcrtomb(buf, 653 (wchar_t)GETARG(wint_t), &mbs); 654 if (mbseqlen == (size_t)-1) { 655 ret = -1; 656 goto error; 657 } 658 cp = buf; 659 size = (int)mbseqlen; 660 } else { 661 #endif 662 *(cp = buf) = GETARG(int); 663 size = 1; 664 #ifdef PRINTF_WIDE_CHAR 665 } 666 #endif 667 sign = '\0'; 668 break; 669 case 'D': 670 flags |= LONGINT; 671 /*FALLTHROUGH*/ 672 case 'd': 673 case 'i': 674 _umax = SARG(); 675 if ((intmax_t)_umax < 0) { 676 _umax = -_umax; 677 sign = '-'; 678 } 679 base = DEC; 680 goto number; 681 #ifdef FLOATING_POINT 682 case 'a': 683 case 'A': 684 if (ch == 'a') { 685 ox[1] = 'x'; 686 xdigs = xdigs_lower; 687 expchar = 'p'; 688 } else { 689 ox[1] = 'X'; 690 xdigs = xdigs_upper; 691 expchar = 'P'; 692 } 693 if (prec >= 0) 694 prec++; 695 if (dtoaresult) 696 __freedtoa(dtoaresult); 697 if (flags & LONGDBL) { 698 fparg.ldbl = GETARG(long double); 699 dtoaresult = cp = 700 __hldtoa(fparg.ldbl, xdigs, prec, 701 &expt, &signflag, &dtoaend); 702 if (dtoaresult == NULL) { 703 errno = ENOMEM; 704 goto error; 705 } 706 } else { 707 fparg.dbl = GETARG(double); 708 dtoaresult = cp = 709 __hdtoa(fparg.dbl, xdigs, prec, 710 &expt, &signflag, &dtoaend); 711 if (dtoaresult == NULL) { 712 errno = ENOMEM; 713 goto error; 714 } 715 } 716 if (prec < 0) 717 prec = dtoaend - cp; 718 if (expt == INT_MAX) 719 ox[1] = '\0'; 720 goto fp_common; 721 case 'e': 722 case 'E': 723 expchar = ch; 724 if (prec < 0) /* account for digit before decpt */ 725 prec = DEFPREC + 1; 726 else 727 prec++; 728 goto fp_begin; 729 case 'f': 730 case 'F': 731 expchar = '\0'; 732 goto fp_begin; 733 case 'g': 734 case 'G': 735 expchar = ch - ('g' - 'e'); 736 if (prec == 0) 737 prec = 1; 738 fp_begin: 739 if (prec < 0) 740 prec = DEFPREC; 741 if (dtoaresult) 742 __freedtoa(dtoaresult); 743 if (flags & LONGDBL) { 744 fparg.ldbl = GETARG(long double); 745 dtoaresult = cp = 746 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 747 &expt, &signflag, &dtoaend); 748 if (dtoaresult == NULL) { 749 errno = ENOMEM; 750 goto error; 751 } 752 } else { 753 fparg.dbl = GETARG(double); 754 dtoaresult = cp = 755 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 756 &expt, &signflag, &dtoaend); 757 if (dtoaresult == NULL) { 758 errno = ENOMEM; 759 goto error; 760 } 761 if (expt == 9999) 762 expt = INT_MAX; 763 } 764 fp_common: 765 if (signflag) 766 sign = '-'; 767 if (expt == INT_MAX) { /* inf or nan */ 768 if (*cp == 'N') 769 cp = (ch >= 'a') ? "nan" : "NAN"; 770 else 771 cp = (ch >= 'a') ? "inf" : "INF"; 772 size = 3; 773 flags &= ~ZEROPAD; 774 break; 775 } 776 flags |= FPT; 777 ndig = dtoaend - cp; 778 if (ch == 'g' || ch == 'G') { 779 if (expt > -4 && expt <= prec) { 780 /* Make %[gG] smell like %[fF] */ 781 expchar = '\0'; 782 if (flags & ALT) 783 prec -= expt; 784 else 785 prec = ndig - expt; 786 if (prec < 0) 787 prec = 0; 788 } else { 789 /* 790 * Make %[gG] smell like %[eE], but 791 * trim trailing zeroes if no # flag. 792 */ 793 if (!(flags & ALT)) 794 prec = ndig; 795 } 796 } 797 if (expchar) { 798 expsize = exponent(expstr, expt - 1, expchar); 799 size = expsize + prec; 800 if (prec > 1 || flags & ALT) 801 ++size; 802 } else { 803 /* space for digits before decimal point */ 804 if (expt > 0) 805 size = expt; 806 else /* "0" */ 807 size = 1; 808 /* space for decimal pt and following digits */ 809 if (prec || flags & ALT) 810 size += prec + 1; 811 lead = expt; 812 } 813 break; 814 #endif /* FLOATING_POINT */ 815 #ifndef NO_PRINTF_PERCENT_N 816 case 'n': 817 if (flags & LLONGINT) 818 *GETARG(long long *) = ret; 819 else if (flags & LONGINT) 820 *GETARG(long *) = ret; 821 else if (flags & SHORTINT) 822 *GETARG(short *) = ret; 823 else if (flags & CHARINT) 824 *GETARG(signed char *) = ret; 825 else if (flags & PTRINT) 826 *GETARG(ptrdiff_t *) = ret; 827 else if (flags & SIZEINT) 828 *GETARG(ssize_t *) = ret; 829 else if (flags & MAXINT) 830 *GETARG(intmax_t *) = ret; 831 else 832 *GETARG(int *) = ret; 833 continue; /* no output */ 834 #endif /* NO_PRINTF_PERCENT_N */ 835 case 'O': 836 flags |= LONGINT; 837 /*FALLTHROUGH*/ 838 case 'o': 839 _umax = UARG(); 840 base = OCT; 841 goto nosign; 842 case 'p': 843 /* 844 * ``The argument shall be a pointer to void. The 845 * value of the pointer is converted to a sequence 846 * of printable characters, in an implementation- 847 * defined manner.'' 848 * -- ANSI X3J11 849 */ 850 _umax = (u_long)GETARG(void *); 851 base = HEX; 852 xdigs = xdigs_lower; 853 ox[1] = 'x'; 854 goto nosign; 855 case 's': 856 #ifdef PRINTF_WIDE_CHAR 857 if (flags & LONGINT) { 858 wchar_t *wcp; 859 860 free(convbuf); 861 convbuf = NULL; 862 if ((wcp = GETARG(wchar_t *)) == NULL) { 863 struct syslog_data sdata = SYSLOG_DATA_INIT; 864 int save_errno = errno; 865 866 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 867 "vfprintf %%ls NULL in \"%s\"", fmt0); 868 errno = save_errno; 869 870 cp = "(null)"; 871 } else { 872 convbuf = __wcsconv(wcp, prec); 873 if (convbuf == NULL) { 874 ret = -1; 875 goto error; 876 } 877 cp = convbuf; 878 } 879 } else 880 #endif /* PRINTF_WIDE_CHAR */ 881 if ((cp = GETARG(char *)) == NULL) { 882 struct syslog_data sdata = SYSLOG_DATA_INIT; 883 int save_errno = errno; 884 885 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 886 "vfprintf %%s NULL in \"%s\"", fmt0); 887 errno = save_errno; 888 889 cp = "(null)"; 890 } 891 len = prec >= 0 ? strnlen(cp, prec) : strlen(cp); 892 if (len > INT_MAX) 893 goto overflow; 894 size = (int)len; 895 sign = '\0'; 896 break; 897 case 'U': 898 flags |= LONGINT; 899 /*FALLTHROUGH*/ 900 case 'u': 901 _umax = UARG(); 902 base = DEC; 903 goto nosign; 904 case 'X': 905 xdigs = xdigs_upper; 906 goto hex; 907 case 'x': 908 xdigs = xdigs_lower; 909 hex: _umax = UARG(); 910 base = HEX; 911 /* leading 0x/X only if non-zero */ 912 if (flags & ALT && _umax != 0) 913 ox[1] = ch; 914 915 /* unsigned conversions */ 916 nosign: sign = '\0'; 917 /* 918 * ``... diouXx conversions ... if a precision is 919 * specified, the 0 flag will be ignored.'' 920 * -- ANSI X3J11 921 */ 922 number: if ((dprec = prec) >= 0) 923 flags &= ~ZEROPAD; 924 925 /* 926 * ``The result of converting a zero value with an 927 * explicit precision of zero is no characters.'' 928 * -- ANSI X3J11 929 */ 930 cp = buf + BUF; 931 if (_umax != 0 || prec != 0) { 932 /* 933 * Unsigned mod is hard, and unsigned mod 934 * by a constant is easier than that by 935 * a variable; hence this switch. 936 */ 937 switch (base) { 938 case OCT: 939 do { 940 *--cp = to_char(_umax & 7); 941 _umax >>= 3; 942 } while (_umax); 943 /* handle octal leading 0 */ 944 if (flags & ALT && *cp != '0') 945 *--cp = '0'; 946 break; 947 948 case DEC: 949 /* many numbers are 1 digit */ 950 while (_umax >= 10) { 951 *--cp = to_char(_umax % 10); 952 _umax /= 10; 953 } 954 *--cp = to_char(_umax); 955 break; 956 957 case HEX: 958 do { 959 *--cp = xdigs[_umax & 15]; 960 _umax >>= 4; 961 } while (_umax); 962 break; 963 964 default: 965 cp = "bug in vfprintf: bad base"; 966 size = strlen(cp); 967 goto skipsize; 968 } 969 } 970 size = buf + BUF - cp; 971 if (size > BUF) /* should never happen */ 972 abort(); 973 skipsize: 974 break; 975 default: /* "%?" prints ?, unless ? is NUL */ 976 if (ch == '\0') 977 goto done; 978 /* pretend it was %c with argument ch */ 979 cp = buf; 980 *cp = ch; 981 size = 1; 982 sign = '\0'; 983 break; 984 } 985 986 /* 987 * All reasonable formats wind up here. At this point, `cp' 988 * points to a string which (if not flags&LADJUST) should be 989 * padded out to `width' places. If flags&ZEROPAD, it should 990 * first be prefixed by any sign or other prefix; otherwise, 991 * it should be blank padded before the prefix is emitted. 992 * After any left-hand padding and prefixing, emit zeroes 993 * required by a decimal %[diouxX] precision, then print the 994 * string proper, then emit zeroes required by any leftover 995 * floating precision; finally, if LADJUST, pad with blanks. 996 * 997 * Compute actual size, so we know how much to pad. 998 * size excludes decimal prec; realsz includes it. 999 */ 1000 realsz = dprec > size ? dprec : size; 1001 if (sign) 1002 realsz++; 1003 if (ox[1]) 1004 realsz+= 2; 1005 1006 /* right-adjusting blank padding */ 1007 if ((flags & (LADJUST|ZEROPAD)) == 0) 1008 PAD(width - realsz, blanks); 1009 1010 /* prefix */ 1011 if (sign) 1012 PRINT(&sign, 1); 1013 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1014 ox[0] = '0'; 1015 PRINT(ox, 2); 1016 } 1017 1018 /* right-adjusting zero padding */ 1019 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1020 PAD(width - realsz, zeroes); 1021 1022 /* leading zeroes from decimal precision */ 1023 PAD(dprec - size, zeroes); 1024 1025 /* the string or number proper */ 1026 #ifdef FLOATING_POINT 1027 if ((flags & FPT) == 0) { 1028 PRINT(cp, size); 1029 } else { /* glue together f_p fragments */ 1030 if (decimal_point == NULL) 1031 decimal_point = nl_langinfo(RADIXCHAR); 1032 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1033 if (expt <= 0) { 1034 PRINT(zeroes, 1); 1035 if (prec || flags & ALT) 1036 PRINT(decimal_point, 1); 1037 PAD(-expt, zeroes); 1038 /* already handled initial 0's */ 1039 prec += expt; 1040 } else { 1041 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1042 cp += lead; 1043 if (prec || flags & ALT) 1044 PRINT(decimal_point, 1); 1045 } 1046 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1047 } else { /* %[eE] or sufficiently long %[gG] */ 1048 if (prec > 1 || flags & ALT) { 1049 buf[0] = *cp++; 1050 buf[1] = *decimal_point; 1051 PRINT(buf, 2); 1052 PRINT(cp, ndig-1); 1053 PAD(prec - ndig, zeroes); 1054 } else { /* XeYYY */ 1055 PRINT(cp, 1); 1056 } 1057 PRINT(expstr, expsize); 1058 } 1059 } 1060 #else 1061 PRINT(cp, size); 1062 #endif 1063 /* left-adjusting padding (always blank) */ 1064 if (flags & LADJUST) 1065 PAD(width - realsz, blanks); 1066 1067 /* finally, adjust ret */ 1068 if (width < realsz) 1069 width = realsz; 1070 if (width > INT_MAX - ret) 1071 goto overflow; 1072 ret += width; 1073 1074 FLUSH(); /* copy out the I/O vectors */ 1075 } 1076 done: 1077 FLUSH(); 1078 error: 1079 va_end(orgap); 1080 if (__sferror(fp)) 1081 ret = -1; 1082 goto finish; 1083 1084 overflow: 1085 errno = EOVERFLOW; 1086 ret = -1; 1087 1088 finish: 1089 #ifdef PRINTF_WIDE_CHAR 1090 free(convbuf); 1091 #endif 1092 #ifdef FLOATING_POINT 1093 if (dtoaresult) 1094 __freedtoa(dtoaresult); 1095 #endif 1096 if (argtable != NULL && argtable != statargtable) { 1097 munmap(argtable, argtablesiz); 1098 argtable = NULL; 1099 } 1100 return (ret); 1101 } 1102 1103 /* 1104 * Type ids for argument type table. 1105 */ 1106 #define T_UNUSED 0 1107 #define T_SHORT 1 1108 #define T_U_SHORT 2 1109 #define TP_SHORT 3 1110 #define T_INT 4 1111 #define T_U_INT 5 1112 #define TP_INT 6 1113 #define T_LONG 7 1114 #define T_U_LONG 8 1115 #define TP_LONG 9 1116 #define T_LLONG 10 1117 #define T_U_LLONG 11 1118 #define TP_LLONG 12 1119 #define T_DOUBLE 13 1120 #define T_LONG_DOUBLE 14 1121 #define TP_CHAR 15 1122 #define TP_VOID 16 1123 #define T_PTRINT 17 1124 #define TP_PTRINT 18 1125 #define T_SIZEINT 19 1126 #define T_SSIZEINT 20 1127 #define TP_SSIZEINT 21 1128 #define T_MAXINT 22 1129 #define T_MAXUINT 23 1130 #define TP_MAXINT 24 1131 #define T_CHAR 25 1132 #define T_U_CHAR 26 1133 #define T_WINT 27 1134 #define TP_WCHAR 28 1135 1136 /* 1137 * Find all arguments when a positional parameter is encountered. Returns a 1138 * table, indexed by argument number, of pointers to each arguments. The 1139 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1140 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1141 * used since we are attempting to make snprintf thread safe, and alloca is 1142 * problematic since we have nested functions..) 1143 */ 1144 static int 1145 __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1146 size_t *argtablesiz) 1147 { 1148 char *fmt; /* format string */ 1149 int ch; /* character from fmt */ 1150 int n, n2; /* handy integer (short term usage) */ 1151 char *cp; /* handy char pointer (short term usage) */ 1152 int flags; /* flags as above */ 1153 unsigned char *typetable; /* table of types */ 1154 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1155 int tablesize; /* current size of type table */ 1156 int tablemax; /* largest used index in table */ 1157 int nextarg; /* 1-based argument index */ 1158 int ret = 0; /* return value */ 1159 wchar_t wc; 1160 mbstate_t ps; 1161 1162 /* 1163 * Add an argument type to the table, expanding if necessary. 1164 */ 1165 #define ADDTYPE(type) \ 1166 ((nextarg >= tablesize) ? \ 1167 __grow_type_table(&typetable, &tablesize) : 0, \ 1168 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1169 typetable[nextarg++] = type) 1170 1171 #define ADDSARG() \ 1172 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1173 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1174 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1175 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1176 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1177 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1178 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1179 1180 #define ADDUARG() \ 1181 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1182 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1183 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1184 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1185 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1186 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1187 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1188 1189 /* 1190 * Add * arguments to the type array. 1191 */ 1192 #define ADDASTER() \ 1193 n2 = 0; \ 1194 cp = fmt; \ 1195 while (is_digit(*cp)) { \ 1196 APPEND_DIGIT(n2, *cp); \ 1197 cp++; \ 1198 } \ 1199 if (*cp == '$') { \ 1200 int hold = nextarg; \ 1201 nextarg = n2; \ 1202 ADDTYPE(T_INT); \ 1203 nextarg = hold; \ 1204 fmt = ++cp; \ 1205 } else { \ 1206 ADDTYPE(T_INT); \ 1207 } 1208 fmt = (char *)fmt0; 1209 typetable = stattypetable; 1210 tablesize = STATIC_ARG_TBL_SIZE; 1211 tablemax = 0; 1212 nextarg = 1; 1213 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1214 memset(&ps, 0, sizeof(ps)); 1215 1216 /* 1217 * Scan the format for conversions (`%' character). 1218 */ 1219 for (;;) { 1220 size_t len; 1221 1222 cp = fmt; 1223 while ((len = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) != 0) { 1224 if (len == (size_t)-1 || len == (size_t)-2) 1225 return (-1); 1226 fmt += len; 1227 if (wc == '%') { 1228 fmt--; 1229 break; 1230 } 1231 } 1232 if (len == 0) 1233 goto done; 1234 fmt++; /* skip over '%' */ 1235 1236 flags = 0; 1237 1238 rflag: ch = *fmt++; 1239 reswitch: switch (ch) { 1240 case ' ': 1241 case '#': 1242 case '\'': 1243 goto rflag; 1244 case '*': 1245 ADDASTER(); 1246 goto rflag; 1247 case '-': 1248 case '+': 1249 goto rflag; 1250 case '.': 1251 if ((ch = *fmt++) == '*') { 1252 ADDASTER(); 1253 goto rflag; 1254 } 1255 while (is_digit(ch)) { 1256 ch = *fmt++; 1257 } 1258 goto reswitch; 1259 case '0': 1260 goto rflag; 1261 case '1': case '2': case '3': case '4': 1262 case '5': case '6': case '7': case '8': case '9': 1263 n = 0; 1264 do { 1265 APPEND_DIGIT(n ,ch); 1266 ch = *fmt++; 1267 } while (is_digit(ch)); 1268 if (ch == '$') { 1269 nextarg = n; 1270 goto rflag; 1271 } 1272 goto reswitch; 1273 #ifdef FLOATING_POINT 1274 case 'L': 1275 flags |= LONGDBL; 1276 goto rflag; 1277 #endif 1278 case 'h': 1279 if (*fmt == 'h') { 1280 fmt++; 1281 flags |= CHARINT; 1282 } else { 1283 flags |= SHORTINT; 1284 } 1285 goto rflag; 1286 case 'j': 1287 flags |= MAXINT; 1288 goto rflag; 1289 case 'l': 1290 if (*fmt == 'l') { 1291 fmt++; 1292 flags |= LLONGINT; 1293 } else { 1294 flags |= LONGINT; 1295 } 1296 goto rflag; 1297 case 'q': 1298 flags |= LLONGINT; 1299 goto rflag; 1300 case 't': 1301 flags |= PTRINT; 1302 goto rflag; 1303 case 'z': 1304 flags |= SIZEINT; 1305 goto rflag; 1306 case 'c': 1307 #ifdef PRINTF_WIDE_CHAR 1308 if (flags & LONGINT) 1309 ADDTYPE(T_WINT); 1310 else 1311 #endif 1312 ADDTYPE(T_INT); 1313 break; 1314 case 'D': 1315 flags |= LONGINT; 1316 /*FALLTHROUGH*/ 1317 case 'd': 1318 case 'i': 1319 ADDSARG(); 1320 break; 1321 #ifdef FLOATING_POINT 1322 case 'a': 1323 case 'A': 1324 case 'e': 1325 case 'E': 1326 case 'f': 1327 case 'F': 1328 case 'g': 1329 case 'G': 1330 if (flags & LONGDBL) 1331 ADDTYPE(T_LONG_DOUBLE); 1332 else 1333 ADDTYPE(T_DOUBLE); 1334 break; 1335 #endif /* FLOATING_POINT */ 1336 #ifndef NO_PRINTF_PERCENT_N 1337 case 'n': 1338 if (flags & LLONGINT) 1339 ADDTYPE(TP_LLONG); 1340 else if (flags & LONGINT) 1341 ADDTYPE(TP_LONG); 1342 else if (flags & SHORTINT) 1343 ADDTYPE(TP_SHORT); 1344 else if (flags & PTRINT) 1345 ADDTYPE(TP_PTRINT); 1346 else if (flags & SIZEINT) 1347 ADDTYPE(TP_SSIZEINT); 1348 else if (flags & MAXINT) 1349 ADDTYPE(TP_MAXINT); 1350 else 1351 ADDTYPE(TP_INT); 1352 continue; /* no output */ 1353 #endif /* NO_PRINTF_PERCENT_N */ 1354 case 'O': 1355 flags |= LONGINT; 1356 /*FALLTHROUGH*/ 1357 case 'o': 1358 ADDUARG(); 1359 break; 1360 case 'p': 1361 ADDTYPE(TP_VOID); 1362 break; 1363 case 's': 1364 #ifdef PRINTF_WIDE_CHAR 1365 if (flags & LONGINT) 1366 ADDTYPE(TP_WCHAR); 1367 else 1368 #endif 1369 ADDTYPE(TP_CHAR); 1370 break; 1371 case 'U': 1372 flags |= LONGINT; 1373 /*FALLTHROUGH*/ 1374 case 'u': 1375 case 'X': 1376 case 'x': 1377 ADDUARG(); 1378 break; 1379 default: /* "%?" prints ?, unless ? is NUL */ 1380 if (ch == '\0') 1381 goto done; 1382 break; 1383 } 1384 } 1385 done: 1386 /* 1387 * Build the argument table. 1388 */ 1389 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1390 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1391 *argtable = mmap(NULL, *argtablesiz, 1392 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1393 if (*argtable == MAP_FAILED) 1394 return (-1); 1395 } 1396 1397 for (n = 1; n <= tablemax; n++) { 1398 switch (typetable[n]) { 1399 case T_UNUSED: 1400 case T_CHAR: 1401 case T_U_CHAR: 1402 case T_SHORT: 1403 case T_U_SHORT: 1404 case T_INT: 1405 (*argtable)[n].intarg = va_arg(ap, int); 1406 break; 1407 case TP_SHORT: 1408 (*argtable)[n].pshortarg = va_arg(ap, short *); 1409 break; 1410 case T_U_INT: 1411 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1412 break; 1413 case TP_INT: 1414 (*argtable)[n].pintarg = va_arg(ap, int *); 1415 break; 1416 case T_LONG: 1417 (*argtable)[n].longarg = va_arg(ap, long); 1418 break; 1419 case T_U_LONG: 1420 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1421 break; 1422 case TP_LONG: 1423 (*argtable)[n].plongarg = va_arg(ap, long *); 1424 break; 1425 case T_LLONG: 1426 (*argtable)[n].longlongarg = va_arg(ap, long long); 1427 break; 1428 case T_U_LLONG: 1429 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1430 break; 1431 case TP_LLONG: 1432 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1433 break; 1434 #ifdef FLOATING_POINT 1435 case T_DOUBLE: 1436 (*argtable)[n].doublearg = va_arg(ap, double); 1437 break; 1438 case T_LONG_DOUBLE: 1439 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1440 break; 1441 #endif 1442 case TP_CHAR: 1443 (*argtable)[n].pchararg = va_arg(ap, char *); 1444 break; 1445 case TP_VOID: 1446 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1447 break; 1448 case T_PTRINT: 1449 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1450 break; 1451 case TP_PTRINT: 1452 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1453 break; 1454 case T_SIZEINT: 1455 (*argtable)[n].sizearg = va_arg(ap, size_t); 1456 break; 1457 case T_SSIZEINT: 1458 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1459 break; 1460 case TP_SSIZEINT: 1461 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1462 break; 1463 case T_MAXINT: 1464 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1465 break; 1466 case T_MAXUINT: 1467 (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t); 1468 break; 1469 case TP_MAXINT: 1470 (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t *); 1471 break; 1472 #ifdef PRINTF_WIDE_CHAR 1473 case T_WINT: 1474 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1475 break; 1476 case TP_WCHAR: 1477 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1478 break; 1479 #endif 1480 } 1481 } 1482 goto finish; 1483 1484 overflow: 1485 errno = EOVERFLOW; 1486 ret = -1; 1487 1488 finish: 1489 if (typetable != NULL && typetable != stattypetable) { 1490 munmap(typetable, *argtablesiz); 1491 typetable = NULL; 1492 } 1493 return (ret); 1494 } 1495 1496 /* 1497 * Increase the size of the type table. 1498 */ 1499 static int 1500 __grow_type_table(unsigned char **typetable, int *tablesize) 1501 { 1502 unsigned char *oldtable = *typetable; 1503 int newsize = *tablesize * 2; 1504 1505 if (newsize < getpagesize()) 1506 newsize = getpagesize(); 1507 1508 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1509 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1510 MAP_ANON|MAP_PRIVATE, -1, 0); 1511 if (*typetable == MAP_FAILED) 1512 return (-1); 1513 bcopy(oldtable, *typetable, *tablesize); 1514 } else { 1515 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1516 MAP_ANON|MAP_PRIVATE, -1, 0); 1517 if (new == MAP_FAILED) 1518 return (-1); 1519 memmove(new, *typetable, *tablesize); 1520 munmap(*typetable, *tablesize); 1521 *typetable = new; 1522 } 1523 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1524 1525 *tablesize = newsize; 1526 return (0); 1527 } 1528 1529 1530 #ifdef FLOATING_POINT 1531 static int 1532 exponent(char *p0, int exp, int fmtch) 1533 { 1534 char *p, *t; 1535 char expbuf[MAXEXPDIG]; 1536 1537 p = p0; 1538 *p++ = fmtch; 1539 if (exp < 0) { 1540 exp = -exp; 1541 *p++ = '-'; 1542 } else 1543 *p++ = '+'; 1544 t = expbuf + MAXEXPDIG; 1545 if (exp > 9) { 1546 do { 1547 *--t = to_char(exp % 10); 1548 } while ((exp /= 10) > 9); 1549 *--t = to_char(exp); 1550 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1551 /* nothing */; 1552 } else { 1553 /* 1554 * Exponents for decimal floating point conversions 1555 * (%[eEgG]) must be at least two characters long, 1556 * whereas exponents for hexadecimal conversions can 1557 * be only one character long. 1558 */ 1559 if (fmtch == 'e' || fmtch == 'E') 1560 *p++ = '0'; 1561 *p++ = to_char(exp); 1562 } 1563 return (p - p0); 1564 } 1565 #endif /* FLOATING_POINT */ 1566