1 /* $OpenBSD: vfprintf.c,v 1.83 2024/07/14 13:31:50 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 #define PRINTF_PAGESIZE (1 << _MAX_PAGE_SHIFT) 60 #define PRINTF_PAGEMASK (PRINTF_PAGESIZE - 1) 61 #define PAGEROUND(x) (((x) + (PRINTF_PAGEMASK)) & ~PRINTF_PAGEMASK) 62 63 union arg { 64 int intarg; 65 unsigned int uintarg; 66 long longarg; 67 unsigned long ulongarg; 68 long long longlongarg; 69 unsigned long long ulonglongarg; 70 ptrdiff_t ptrdiffarg; 71 size_t sizearg; 72 ssize_t ssizearg; 73 intmax_t intmaxarg; 74 uintmax_t uintmaxarg; 75 void *pvoidarg; 76 char *pchararg; 77 signed char *pschararg; 78 short *pshortarg; 79 int *pintarg; 80 long *plongarg; 81 long long *plonglongarg; 82 ptrdiff_t *pptrdiffarg; 83 ssize_t *pssizearg; 84 intmax_t *pintmaxarg; 85 #ifdef FLOATING_POINT 86 double doublearg; 87 long double longdoublearg; 88 #endif 89 #ifdef PRINTF_WIDE_CHAR 90 wint_t wintarg; 91 wchar_t *pwchararg; 92 #endif 93 }; 94 95 static int __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 96 size_t *argtablesiz); 97 static int __grow_type_table(unsigned char **typetable, int *tablesize); 98 99 /* 100 * Flush out all the vectors defined by the given uio, 101 * then reset it so that it can be reused. 102 */ 103 static int 104 __sprint(FILE *fp, struct __suio *uio) 105 { 106 int err; 107 108 if (uio->uio_resid == 0) { 109 uio->uio_iovcnt = 0; 110 return (0); 111 } 112 err = __sfvwrite(fp, uio); 113 uio->uio_resid = 0; 114 uio->uio_iovcnt = 0; 115 return (err); 116 } 117 118 /* 119 * Helper function for `fprintf to unbuffered unix file': creates a 120 * temporary buffer. We only work on write-only files; this avoids 121 * worries about ungetc buffers and so forth. 122 */ 123 static int 124 __sbprintf(FILE *fp, const char *fmt, va_list ap) 125 { 126 int ret; 127 FILE fake; 128 struct __sfileext fakeext; 129 unsigned char buf[BUFSIZ]; 130 131 _FILEEXT_SETUP(&fake, &fakeext); 132 /* copy the important variables */ 133 fake._flags = fp->_flags & ~__SNBF; 134 fake._file = fp->_file; 135 fake._cookie = fp->_cookie; 136 fake._write = fp->_write; 137 138 /* set up the buffer */ 139 fake._bf._base = fake._p = buf; 140 fake._bf._size = fake._w = sizeof(buf); 141 fake._lbfsize = 0; /* not actually used, but Just In Case */ 142 143 /* do the work, then copy any error status */ 144 ret = __vfprintf(&fake, fmt, ap); 145 if (ret >= 0 && __sflush(&fake)) 146 ret = EOF; 147 if (fake._flags & __SERR) 148 fp->_flags |= __SERR; 149 return (ret); 150 } 151 152 #ifdef PRINTF_WIDE_CHAR 153 /* 154 * Convert a wide character string argument for the %ls format to a multibyte 155 * string representation. If not -1, prec specifies the maximum number of 156 * bytes to output, and also means that we can't assume that the wide char 157 * string is null-terminated. 158 */ 159 static char * 160 __wcsconv(wchar_t *wcsarg, int prec, char **convbufp, size_t *convbufsizp) 161 { 162 char *convbuf = *convbufp; 163 size_t convbufsiz = *convbufsizp; 164 mbstate_t mbs; 165 char buf[MB_LEN_MAX]; 166 wchar_t *p; 167 size_t clen, nbytes; 168 169 /* Allocate space for the maximum number of bytes we could output. */ 170 if (prec < 0) { 171 memset(&mbs, 0, sizeof(mbs)); 172 p = wcsarg; 173 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs); 174 if (nbytes == (size_t)-1) 175 return (NULL); 176 } else { 177 /* 178 * Optimisation: if the output precision is small enough, 179 * just allocate enough memory for the maximum instead of 180 * scanning the string. 181 */ 182 if (prec < 128) 183 nbytes = prec; 184 else { 185 nbytes = 0; 186 p = wcsarg; 187 memset(&mbs, 0, sizeof(mbs)); 188 for (;;) { 189 clen = wcrtomb(buf, *p++, &mbs); 190 if (clen == 0 || clen == (size_t)-1 || 191 nbytes + clen > (size_t)prec) 192 break; 193 nbytes += clen; 194 } 195 if (clen == (size_t)-1) 196 return (NULL); 197 } 198 } 199 if (nbytes + 1 > convbufsiz) { 200 if (convbuf != NULL) 201 munmap(convbuf, convbufsiz); 202 convbufsiz = PAGEROUND(nbytes + 1); 203 convbuf = mmap(NULL, convbufsiz, PROT_WRITE|PROT_READ, 204 MAP_ANON|MAP_PRIVATE, -1, 0); 205 if (convbuf == MAP_FAILED) { 206 *convbufp = NULL; 207 *convbufsizp = 0; 208 return (NULL); 209 } 210 *convbufp = convbuf; 211 *convbufsizp = convbufsiz; 212 } 213 214 /* Fill the output buffer. */ 215 p = wcsarg; 216 memset(&mbs, 0, sizeof(mbs)); 217 if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p, 218 nbytes, &mbs)) == (size_t)-1) { 219 return (NULL); 220 } 221 convbuf[nbytes] = '\0'; 222 return (convbuf); 223 } 224 #endif 225 226 #ifdef FLOATING_POINT 227 #include <float.h> 228 #include <locale.h> 229 #include <math.h> 230 #include "floatio.h" 231 #include "gdtoa.h" 232 233 #define DEFPREC 6 234 235 static int exponent(char *, int, int); 236 #endif /* FLOATING_POINT */ 237 238 /* 239 * The size of the buffer we use as scratch space for integer 240 * conversions, among other things. Technically, we would need the 241 * most space for base 10 conversions with thousands' grouping 242 * characters between each pair of digits. 100 bytes is a 243 * conservative overestimate even for a 128-bit uintmax_t. 244 */ 245 #define BUF 100 246 247 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 248 249 250 /* 251 * Macros for converting digits to letters and vice versa 252 */ 253 #define to_digit(c) ((c) - '0') 254 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 255 #define to_char(n) ((n) + '0') 256 257 /* 258 * Flags used during conversion. 259 */ 260 #define ALT 0x0001 /* alternate form */ 261 #define LADJUST 0x0004 /* left adjustment */ 262 #define LONGDBL 0x0008 /* long double */ 263 #define LONGINT 0x0010 /* long integer */ 264 #define LLONGINT 0x0020 /* long long integer */ 265 #define SHORTINT 0x0040 /* short integer */ 266 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ 267 #define FPT 0x0100 /* Floating point number */ 268 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ 269 #define SIZEINT 0x0400 /* (signed) size_t */ 270 #define CHARINT 0x0800 /* 8 bit integer */ 271 #define MAXINT 0x1000 /* largest integer size (intmax_t) */ 272 273 int 274 vfprintf(FILE *fp, const char *fmt0, __va_list ap) 275 { 276 int ret; 277 278 FLOCKFILE(fp); 279 ret = __vfprintf(fp, fmt0, ap); 280 FUNLOCKFILE(fp); 281 return (ret); 282 } 283 DEF_STRONG(vfprintf); 284 285 int 286 __vfprintf(FILE *fp, const char *fmt0, __va_list ap) 287 { 288 char *fmt; /* format string */ 289 int ch; /* character from fmt */ 290 int n, n2; /* handy integers (short term usage) */ 291 char *cp; /* handy char pointer (short term usage) */ 292 struct __siov *iovp; /* for PRINT macro */ 293 int flags; /* flags as above */ 294 int ret; /* return value accumulator */ 295 int width; /* width from format (%8d), or 0 */ 296 int prec; /* precision from format; <0 for N/A */ 297 char sign; /* sign prefix (' ', '+', '-', or \0) */ 298 #ifdef FLOATING_POINT 299 /* 300 * We can decompose the printed representation of floating 301 * point numbers into several parts, some of which may be empty: 302 * 303 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 304 * A B ---C--- D E F 305 * 306 * A: 'sign' holds this value if present; '\0' otherwise 307 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 308 * C: cp points to the string MMMNNN. Leading and trailing 309 * zeros are not in the string and must be added. 310 * D: expchar holds this character; '\0' if no exponent, e.g. %f 311 * F: at least two digits for decimal, at least one digit for hex 312 */ 313 char *decimal_point = NULL; 314 int signflag; /* true if float is negative */ 315 union { /* floating point arguments %[aAeEfFgG] */ 316 double dbl; 317 long double ldbl; 318 } fparg; 319 int expt; /* integer value of exponent */ 320 char expchar; /* exponent character: [eEpP\0] */ 321 char *dtoaend; /* pointer to end of converted digits */ 322 int expsize; /* character count for expstr */ 323 int lead; /* sig figs before decimal or group sep */ 324 int ndig; /* actual number of digits returned by dtoa */ 325 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 326 char *dtoaresult = NULL; 327 #endif 328 329 uintmax_t _umax; /* integer arguments %[diouxX] */ 330 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 331 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 332 int realsz; /* field size expanded by dprec */ 333 int size; /* size of converted field or string */ 334 const char *xdigs; /* digits for %[xX] conversion */ 335 #define NIOV 8 336 struct __suio uio; /* output information: summary */ 337 struct __siov iov[NIOV];/* ... and individual io vectors */ 338 char buf[BUF]; /* buffer with space for digits of uintmax_t */ 339 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 340 union arg *argtable; /* args, built due to positional arg */ 341 union arg statargtable[STATIC_ARG_TBL_SIZE]; 342 size_t argtablesiz; 343 int nextarg; /* 1-based argument index */ 344 va_list orgap; /* original argument pointer */ 345 #ifdef PRINTF_WIDE_CHAR 346 char *convbuf; /* buffer for wide to multi-byte conversion */ 347 size_t convbufsiz; /* size of convbuf, for munmap() */ 348 #endif 349 350 /* 351 * Choose PADSIZE to trade efficiency vs. size. If larger printf 352 * fields occur frequently, increase PADSIZE and make the initialisers 353 * below longer. 354 */ 355 #define PADSIZE 16 /* pad chunk size */ 356 static char blanks[PADSIZE] = 357 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 358 static char zeroes[PADSIZE] = 359 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 360 361 static const char xdigs_lower[16] = "0123456789abcdef"; 362 static const char xdigs_upper[16] = "0123456789ABCDEF"; 363 364 /* 365 * BEWARE, these `goto error' on error, and PAD uses `n'. 366 */ 367 #define PRINT(ptr, len) do { \ 368 iovp->iov_base = (ptr); \ 369 iovp->iov_len = (len); \ 370 uio.uio_resid += (len); \ 371 iovp++; \ 372 if (++uio.uio_iovcnt >= NIOV) { \ 373 if (__sprint(fp, &uio)) \ 374 goto error; \ 375 iovp = iov; \ 376 } \ 377 } while (0) 378 #define PAD(howmany, with) do { \ 379 if ((n = (howmany)) > 0) { \ 380 while (n > PADSIZE) { \ 381 PRINT(with, PADSIZE); \ 382 n -= PADSIZE; \ 383 } \ 384 PRINT(with, n); \ 385 } \ 386 } while (0) 387 #define PRINTANDPAD(p, ep, len, with) do { \ 388 n2 = (ep) - (p); \ 389 if (n2 > (len)) \ 390 n2 = (len); \ 391 if (n2 > 0) \ 392 PRINT((p), n2); \ 393 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 394 } while(0) 395 #define FLUSH() do { \ 396 if (uio.uio_resid && __sprint(fp, &uio)) \ 397 goto error; \ 398 uio.uio_iovcnt = 0; \ 399 iovp = iov; \ 400 } while (0) 401 402 /* 403 * To extend shorts properly, we need both signed and unsigned 404 * argument extraction methods. 405 */ 406 #define SARG() \ 407 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 408 flags&LLONGINT ? GETARG(long long) : \ 409 flags&LONGINT ? GETARG(long) : \ 410 flags&PTRINT ? GETARG(ptrdiff_t) : \ 411 flags&SIZEINT ? GETARG(ssize_t) : \ 412 flags&SHORTINT ? (short)GETARG(int) : \ 413 flags&CHARINT ? (signed char)GETARG(int) : \ 414 GETARG(int))) 415 #define UARG() \ 416 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 417 flags&LLONGINT ? GETARG(unsigned long long) : \ 418 flags&LONGINT ? GETARG(unsigned long) : \ 419 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 420 flags&SIZEINT ? GETARG(size_t) : \ 421 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 422 flags&CHARINT ? (unsigned char)GETARG(int) : \ 423 GETARG(unsigned int))) 424 425 /* 426 * Append a digit to a value and check for overflow. 427 */ 428 #define APPEND_DIGIT(val, dig) do { \ 429 if ((val) > INT_MAX / 10) \ 430 goto overflow; \ 431 (val) *= 10; \ 432 if ((val) > INT_MAX - to_digit((dig))) \ 433 goto overflow; \ 434 (val) += to_digit((dig)); \ 435 } while (0) 436 437 /* 438 * Get * arguments, including the form *nn$. Preserve the nextarg 439 * that the argument can be gotten once the type is determined. 440 */ 441 #define GETASTER(val) \ 442 n2 = 0; \ 443 cp = fmt; \ 444 while (is_digit(*cp)) { \ 445 APPEND_DIGIT(n2, *cp); \ 446 cp++; \ 447 } \ 448 if (*cp == '$') { \ 449 int hold = nextarg; \ 450 if (argtable == NULL) { \ 451 argtable = statargtable; \ 452 if (__find_arguments(fmt0, orgap, &argtable, \ 453 &argtablesiz) == -1) { \ 454 ret = -1; \ 455 goto error; \ 456 } \ 457 } \ 458 nextarg = n2; \ 459 val = GETARG(int); \ 460 nextarg = hold; \ 461 fmt = ++cp; \ 462 } else { \ 463 val = GETARG(int); \ 464 } 465 466 /* 467 * Get the argument indexed by nextarg. If the argument table is 468 * built, use it to get the argument. If its not, get the next 469 * argument (and arguments must be gotten sequentially). 470 */ 471 #define GETARG(type) \ 472 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 473 (nextarg++, va_arg(ap, type))) 474 475 _SET_ORIENTATION(fp, -1); 476 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ 477 if (cantwrite(fp)) 478 return (EOF); 479 480 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 481 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 482 fp->_file >= 0) 483 return (__sbprintf(fp, fmt0, ap)); 484 485 fmt = (char *)fmt0; 486 argtable = NULL; 487 nextarg = 1; 488 va_copy(orgap, ap); 489 uio.uio_iov = iovp = iov; 490 uio.uio_resid = 0; 491 uio.uio_iovcnt = 0; 492 ret = 0; 493 #ifdef PRINTF_WIDE_CHAR 494 convbuf = NULL; 495 convbufsiz = 0; 496 #endif 497 498 /* 499 * Scan the format for conversions (`%' character). 500 */ 501 for (;;) { 502 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 503 continue; 504 505 if (fmt != cp) { 506 ptrdiff_t m = fmt - cp; 507 if (m < 0 || m > INT_MAX - ret) 508 goto overflow; 509 PRINT(cp, m); 510 ret += m; 511 } 512 if (ch == '\0') 513 goto done; 514 fmt++; /* skip over '%' */ 515 516 flags = 0; 517 dprec = 0; 518 width = 0; 519 prec = -1; 520 sign = '\0'; 521 ox[1] = '\0'; 522 523 rflag: ch = *fmt++; 524 reswitch: switch (ch) { 525 case ' ': 526 /* 527 * ``If the space and + flags both appear, the space 528 * flag will be ignored.'' 529 * -- ANSI X3J11 530 */ 531 if (!sign) 532 sign = ' '; 533 goto rflag; 534 case '#': 535 flags |= ALT; 536 goto rflag; 537 case '\'': 538 /* grouping not implemented */ 539 goto rflag; 540 case '*': 541 /* 542 * ``A negative field width argument is taken as a 543 * - flag followed by a positive field width.'' 544 * -- ANSI X3J11 545 * They don't exclude field widths read from args. 546 */ 547 GETASTER(width); 548 if (width >= 0) 549 goto rflag; 550 if (width == INT_MIN) 551 goto overflow; 552 width = -width; 553 /* FALLTHROUGH */ 554 case '-': 555 flags |= LADJUST; 556 goto rflag; 557 case '+': 558 sign = '+'; 559 goto rflag; 560 case '.': 561 if ((ch = *fmt++) == '*') { 562 GETASTER(n); 563 prec = n < 0 ? -1 : n; 564 goto rflag; 565 } 566 n = 0; 567 while (is_digit(ch)) { 568 APPEND_DIGIT(n, ch); 569 ch = *fmt++; 570 } 571 if (ch == '$') { 572 nextarg = n; 573 if (argtable == NULL) { 574 argtable = statargtable; 575 if (__find_arguments(fmt0, orgap, 576 &argtable, &argtablesiz) == -1) { 577 ret = -1; 578 goto error; 579 } 580 } 581 goto rflag; 582 } 583 prec = n; 584 goto reswitch; 585 case '0': 586 /* 587 * ``Note that 0 is taken as a flag, not as the 588 * beginning of a field width.'' 589 * -- ANSI X3J11 590 */ 591 flags |= ZEROPAD; 592 goto rflag; 593 case '1': case '2': case '3': case '4': 594 case '5': case '6': case '7': case '8': case '9': 595 n = 0; 596 do { 597 APPEND_DIGIT(n, ch); 598 ch = *fmt++; 599 } while (is_digit(ch)); 600 if (ch == '$') { 601 nextarg = n; 602 if (argtable == NULL) { 603 argtable = statargtable; 604 if (__find_arguments(fmt0, orgap, 605 &argtable, &argtablesiz) == -1) { 606 ret = -1; 607 goto error; 608 } 609 } 610 goto rflag; 611 } 612 width = n; 613 goto reswitch; 614 #ifdef FLOATING_POINT 615 case 'L': 616 flags |= LONGDBL; 617 goto rflag; 618 #endif 619 case 'h': 620 if (*fmt == 'h') { 621 fmt++; 622 flags |= CHARINT; 623 } else { 624 flags |= SHORTINT; 625 } 626 goto rflag; 627 case 'j': 628 flags |= MAXINT; 629 goto rflag; 630 case 'l': 631 if (*fmt == 'l') { 632 fmt++; 633 flags |= LLONGINT; 634 } else { 635 flags |= LONGINT; 636 } 637 goto rflag; 638 case 'q': 639 flags |= LLONGINT; 640 goto rflag; 641 case 't': 642 flags |= PTRINT; 643 goto rflag; 644 case 'z': 645 flags |= SIZEINT; 646 goto rflag; 647 case 'c': 648 #ifdef PRINTF_WIDE_CHAR 649 if (flags & LONGINT) { 650 mbstate_t mbs; 651 size_t mbseqlen; 652 653 memset(&mbs, 0, sizeof(mbs)); 654 mbseqlen = wcrtomb(buf, 655 (wchar_t)GETARG(wint_t), &mbs); 656 if (mbseqlen == (size_t)-1) { 657 ret = -1; 658 goto error; 659 } 660 cp = buf; 661 size = (int)mbseqlen; 662 } else { 663 #endif 664 *(cp = buf) = GETARG(int); 665 size = 1; 666 #ifdef PRINTF_WIDE_CHAR 667 } 668 #endif 669 sign = '\0'; 670 break; 671 case 'D': 672 flags |= LONGINT; 673 /*FALLTHROUGH*/ 674 case 'd': 675 case 'i': 676 _umax = SARG(); 677 if ((intmax_t)_umax < 0) { 678 _umax = -_umax; 679 sign = '-'; 680 } 681 base = DEC; 682 goto number; 683 #ifdef FLOATING_POINT 684 case 'a': 685 case 'A': 686 if (ch == 'a') { 687 ox[1] = 'x'; 688 xdigs = xdigs_lower; 689 expchar = 'p'; 690 } else { 691 ox[1] = 'X'; 692 xdigs = xdigs_upper; 693 expchar = 'P'; 694 } 695 if (prec >= 0) 696 prec++; 697 if (dtoaresult) 698 __freedtoa(dtoaresult); 699 if (flags & LONGDBL) { 700 fparg.ldbl = GETARG(long double); 701 dtoaresult = cp = 702 __hldtoa(fparg.ldbl, xdigs, prec, 703 &expt, &signflag, &dtoaend); 704 if (dtoaresult == NULL) { 705 errno = ENOMEM; 706 goto error; 707 } 708 } else { 709 fparg.dbl = GETARG(double); 710 dtoaresult = cp = 711 __hdtoa(fparg.dbl, xdigs, prec, 712 &expt, &signflag, &dtoaend); 713 if (dtoaresult == NULL) { 714 errno = ENOMEM; 715 goto error; 716 } 717 } 718 if (prec < 0) 719 prec = dtoaend - cp; 720 if (expt == INT_MAX) 721 ox[1] = '\0'; 722 goto fp_common; 723 case 'e': 724 case 'E': 725 expchar = ch; 726 if (prec < 0) /* account for digit before decpt */ 727 prec = DEFPREC + 1; 728 else 729 prec++; 730 goto fp_begin; 731 case 'f': 732 case 'F': 733 expchar = '\0'; 734 goto fp_begin; 735 case 'g': 736 case 'G': 737 expchar = ch - ('g' - 'e'); 738 if (prec == 0) 739 prec = 1; 740 fp_begin: 741 if (prec < 0) 742 prec = DEFPREC; 743 if (dtoaresult) 744 __freedtoa(dtoaresult); 745 if (flags & LONGDBL) { 746 fparg.ldbl = GETARG(long double); 747 dtoaresult = cp = 748 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 749 &expt, &signflag, &dtoaend); 750 if (dtoaresult == NULL) { 751 errno = ENOMEM; 752 goto error; 753 } 754 } else { 755 fparg.dbl = GETARG(double); 756 dtoaresult = cp = 757 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 758 &expt, &signflag, &dtoaend); 759 if (dtoaresult == NULL) { 760 errno = ENOMEM; 761 goto error; 762 } 763 if (expt == 9999) 764 expt = INT_MAX; 765 } 766 fp_common: 767 if (signflag) 768 sign = '-'; 769 if (expt == INT_MAX) { /* inf or nan */ 770 if (*cp == 'N') 771 cp = (ch >= 'a') ? "nan" : "NAN"; 772 else 773 cp = (ch >= 'a') ? "inf" : "INF"; 774 size = 3; 775 flags &= ~ZEROPAD; 776 break; 777 } 778 flags |= FPT; 779 ndig = dtoaend - cp; 780 if (ch == 'g' || ch == 'G') { 781 if (expt > -4 && expt <= prec) { 782 /* Make %[gG] smell like %[fF] */ 783 expchar = '\0'; 784 if (flags & ALT) 785 prec -= expt; 786 else 787 prec = ndig - expt; 788 if (prec < 0) 789 prec = 0; 790 } else { 791 /* 792 * Make %[gG] smell like %[eE], but 793 * trim trailing zeroes if no # flag. 794 */ 795 if (!(flags & ALT)) 796 prec = ndig; 797 } 798 } 799 if (expchar) { 800 expsize = exponent(expstr, expt - 1, expchar); 801 size = expsize + prec; 802 if (prec > 1 || flags & ALT) 803 ++size; 804 } else { 805 /* space for digits before decimal point */ 806 if (expt > 0) 807 size = expt; 808 else /* "0" */ 809 size = 1; 810 /* space for decimal pt and following digits */ 811 if (prec || flags & ALT) 812 size += prec + 1; 813 lead = expt; 814 } 815 break; 816 #endif /* FLOATING_POINT */ 817 case 'n': { 818 static const char n_msg[] = ": *printf used %n, aborting: "; 819 char buf[1024], *p; 820 821 /* <10> is LOG_CRIT */ 822 strlcpy(buf, "<10>", sizeof buf); 823 824 /* Make sure progname does not fill the whole buffer */ 825 strlcat(buf, __progname, sizeof(buf) - sizeof n_msg); 826 strlcat(buf, n_msg, sizeof buf); 827 strlcat(buf, fmt0, sizeof buf); 828 if ((p = strchr(buf, '\n'))) 829 *p = '\0'; 830 sendsyslog(buf, strlen(buf), LOG_CONS); 831 abort(); 832 break; 833 } 834 case 'O': 835 flags |= LONGINT; 836 /*FALLTHROUGH*/ 837 case 'o': 838 _umax = UARG(); 839 base = OCT; 840 goto nosign; 841 case 'p': 842 /* 843 * ``The argument shall be a pointer to void. The 844 * value of the pointer is converted to a sequence 845 * of printable characters, in an implementation- 846 * defined manner.'' 847 * -- ANSI X3J11 848 */ 849 _umax = (u_long)GETARG(void *); 850 base = HEX; 851 xdigs = xdigs_lower; 852 ox[1] = 'x'; 853 goto nosign; 854 case 's': { 855 size_t len; 856 857 #ifdef PRINTF_WIDE_CHAR 858 if (flags & LONGINT) { 859 wchar_t *wcp; 860 861 if ((wcp = GETARG(wchar_t *)) == NULL) { 862 struct syslog_data sdata = SYSLOG_DATA_INIT; 863 int save_errno = errno; 864 865 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 866 "vfprintf %%ls NULL in \"%s\"", fmt0); 867 errno = save_errno; 868 869 cp = "(null)"; 870 } else { 871 cp = __wcsconv(wcp, prec, &convbuf, 872 &convbufsiz); 873 if (cp == NULL) { 874 ret = -1; 875 goto error; 876 } 877 } 878 } else 879 #endif /* PRINTF_WIDE_CHAR */ 880 881 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 } 897 break; 898 case 'U': 899 flags |= LONGINT; 900 /*FALLTHROUGH*/ 901 case 'u': 902 _umax = UARG(); 903 base = DEC; 904 goto nosign; 905 case 'X': 906 xdigs = xdigs_upper; 907 goto hex; 908 case 'x': 909 xdigs = xdigs_lower; 910 hex: _umax = UARG(); 911 base = HEX; 912 /* leading 0x/X only if non-zero */ 913 if (flags & ALT && _umax != 0) 914 ox[1] = ch; 915 916 /* unsigned conversions */ 917 nosign: sign = '\0'; 918 /* 919 * ``... diouXx conversions ... if a precision is 920 * specified, the 0 flag will be ignored.'' 921 * -- ANSI X3J11 922 */ 923 number: if ((dprec = prec) >= 0) 924 flags &= ~ZEROPAD; 925 926 /* 927 * ``The result of converting a zero value with an 928 * explicit precision of zero is no characters.'' 929 * -- ANSI X3J11 930 */ 931 cp = buf + BUF; 932 if (_umax != 0 || prec != 0) { 933 /* 934 * Unsigned mod is hard, and unsigned mod 935 * by a constant is easier than that by 936 * a variable; hence this switch. 937 */ 938 switch (base) { 939 case OCT: 940 do { 941 *--cp = to_char(_umax & 7); 942 _umax >>= 3; 943 } while (_umax); 944 /* handle octal leading 0 */ 945 if (flags & ALT && *cp != '0') 946 *--cp = '0'; 947 break; 948 949 case DEC: 950 /* many numbers are 1 digit */ 951 while (_umax >= 10) { 952 *--cp = to_char(_umax % 10); 953 _umax /= 10; 954 } 955 *--cp = to_char(_umax); 956 break; 957 958 case HEX: 959 do { 960 *--cp = xdigs[_umax & 15]; 961 _umax >>= 4; 962 } while (_umax); 963 break; 964 965 default: 966 cp = "bug in vfprintf: bad base"; 967 size = strlen(cp); 968 goto skipsize; 969 } 970 } 971 size = buf + BUF - cp; 972 if (size > BUF) /* should never happen */ 973 abort(); 974 skipsize: 975 break; 976 default: /* "%?" prints ?, unless ? is NUL */ 977 if (ch == '\0') 978 goto done; 979 /* pretend it was %c with argument ch */ 980 cp = buf; 981 *cp = ch; 982 size = 1; 983 sign = '\0'; 984 break; 985 } 986 987 /* 988 * All reasonable formats wind up here. At this point, `cp' 989 * points to a string which (if not flags&LADJUST) should be 990 * padded out to `width' places. If flags&ZEROPAD, it should 991 * first be prefixed by any sign or other prefix; otherwise, 992 * it should be blank padded before the prefix is emitted. 993 * After any left-hand padding and prefixing, emit zeroes 994 * required by a decimal %[diouxX] precision, then print the 995 * string proper, then emit zeroes required by any leftover 996 * floating precision; finally, if LADJUST, pad with blanks. 997 * 998 * Compute actual size, so we know how much to pad. 999 * size excludes decimal prec; realsz includes it. 1000 */ 1001 realsz = dprec > size ? dprec : size; 1002 if (sign) 1003 realsz++; 1004 if (ox[1]) 1005 realsz+= 2; 1006 1007 /* right-adjusting blank padding */ 1008 if ((flags & (LADJUST|ZEROPAD)) == 0) 1009 PAD(width - realsz, blanks); 1010 1011 /* prefix */ 1012 if (sign) 1013 PRINT(&sign, 1); 1014 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1015 ox[0] = '0'; 1016 PRINT(ox, 2); 1017 } 1018 1019 /* right-adjusting zero padding */ 1020 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1021 PAD(width - realsz, zeroes); 1022 1023 /* leading zeroes from decimal precision */ 1024 PAD(dprec - size, zeroes); 1025 1026 /* the string or number proper */ 1027 #ifdef FLOATING_POINT 1028 if ((flags & FPT) == 0) { 1029 PRINT(cp, size); 1030 } else { /* glue together f_p fragments */ 1031 if (decimal_point == NULL) 1032 decimal_point = nl_langinfo(RADIXCHAR); 1033 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1034 if (expt <= 0) { 1035 PRINT(zeroes, 1); 1036 if (prec || flags & ALT) 1037 PRINT(decimal_point, 1); 1038 PAD(-expt, zeroes); 1039 /* already handled initial 0's */ 1040 prec += expt; 1041 } else { 1042 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1043 cp += lead; 1044 if (prec || flags & ALT) 1045 PRINT(decimal_point, 1); 1046 } 1047 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1048 } else { /* %[eE] or sufficiently long %[gG] */ 1049 if (prec > 1 || flags & ALT) { 1050 buf[0] = *cp++; 1051 buf[1] = *decimal_point; 1052 PRINT(buf, 2); 1053 PRINT(cp, ndig-1); 1054 PAD(prec - ndig, zeroes); 1055 } else { /* XeYYY */ 1056 PRINT(cp, 1); 1057 } 1058 PRINT(expstr, expsize); 1059 } 1060 } 1061 #else 1062 PRINT(cp, size); 1063 #endif 1064 /* left-adjusting padding (always blank) */ 1065 if (flags & LADJUST) 1066 PAD(width - realsz, blanks); 1067 1068 /* finally, adjust ret */ 1069 if (width < realsz) 1070 width = realsz; 1071 if (width > INT_MAX - ret) 1072 goto overflow; 1073 ret += width; 1074 1075 FLUSH(); /* copy out the I/O vectors */ 1076 } 1077 done: 1078 FLUSH(); 1079 error: 1080 va_end(orgap); 1081 if (__sferror(fp)) 1082 ret = -1; 1083 goto finish; 1084 1085 overflow: 1086 errno = EOVERFLOW; 1087 ret = -1; 1088 1089 finish: 1090 #ifdef PRINTF_WIDE_CHAR 1091 if (convbuf != NULL) 1092 munmap(convbuf, convbufsiz); 1093 #endif 1094 #ifdef FLOATING_POINT 1095 if (dtoaresult) 1096 __freedtoa(dtoaresult); 1097 #endif 1098 if (argtable != NULL && argtable != statargtable) { 1099 munmap(argtable, argtablesiz); 1100 argtable = NULL; 1101 } 1102 return (ret); 1103 } 1104 1105 /* 1106 * Type ids for argument type table. 1107 */ 1108 #define T_UNUSED 0 1109 #define T_SHORT 1 1110 #define T_U_SHORT 2 1111 #define TP_SHORT 3 1112 #define T_INT 4 1113 #define T_U_INT 5 1114 #define TP_INT 6 1115 #define T_LONG 7 1116 #define T_U_LONG 8 1117 #define TP_LONG 9 1118 #define T_LLONG 10 1119 #define T_U_LLONG 11 1120 #define TP_LLONG 12 1121 #define T_DOUBLE 13 1122 #define T_LONG_DOUBLE 14 1123 #define TP_CHAR 15 1124 #define TP_VOID 16 1125 #define T_PTRINT 17 1126 #define TP_PTRINT 18 1127 #define T_SIZEINT 19 1128 #define T_SSIZEINT 20 1129 #define TP_SSIZEINT 21 1130 #define T_MAXINT 22 1131 #define T_MAXUINT 23 1132 #define TP_MAXINT 24 1133 #define T_CHAR 25 1134 #define T_U_CHAR 26 1135 #define T_WINT 27 1136 #define TP_WCHAR 28 1137 1138 /* 1139 * Find all arguments when a positional parameter is encountered. Returns a 1140 * table, indexed by argument number, of pointers to each arguments. The 1141 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1142 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1143 * used since we are attempting to make snprintf thread safe, and alloca is 1144 * problematic since we have nested functions..) 1145 */ 1146 static int 1147 __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1148 size_t *argtablesiz) 1149 { 1150 char *fmt; /* format string */ 1151 int ch; /* character from fmt */ 1152 int n, n2; /* handy integer (short term usage) */ 1153 char *cp; /* handy char pointer (short term usage) */ 1154 int flags; /* flags as above */ 1155 unsigned char *typetable; /* table of types */ 1156 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1157 int tablesize; /* current size of type table */ 1158 int tablemax; /* largest used index in table */ 1159 int nextarg; /* 1-based argument index */ 1160 int ret = 0; /* return value */ 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 == '$') { \ 1200 int hold = nextarg; \ 1201 nextarg = n2; \ 1202 ADDTYPE(T_INT); \ 1203 nextarg = hold; \ 1204 fmt = ++cp; \ 1205 } else { \ 1206 ADDTYPE(T_INT); \ 1207 } 1208 fmt = (char *)fmt0; 1209 typetable = stattypetable; 1210 tablesize = STATIC_ARG_TBL_SIZE; 1211 tablemax = 0; 1212 nextarg = 1; 1213 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1214 1215 /* 1216 * Scan the format for conversions (`%' character). 1217 */ 1218 for (;;) { 1219 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1220 continue; 1221 if (ch == '\0') 1222 goto done; 1223 fmt++; /* skip over '%' */ 1224 1225 flags = 0; 1226 1227 rflag: ch = *fmt++; 1228 reswitch: switch (ch) { 1229 case ' ': 1230 case '#': 1231 case '\'': 1232 goto rflag; 1233 case '*': 1234 ADDASTER(); 1235 goto rflag; 1236 case '-': 1237 case '+': 1238 goto rflag; 1239 case '.': 1240 if ((ch = *fmt++) == '*') { 1241 ADDASTER(); 1242 goto rflag; 1243 } 1244 while (is_digit(ch)) { 1245 ch = *fmt++; 1246 } 1247 goto reswitch; 1248 case '0': 1249 goto rflag; 1250 case '1': case '2': case '3': case '4': 1251 case '5': case '6': case '7': case '8': case '9': 1252 n = 0; 1253 do { 1254 APPEND_DIGIT(n ,ch); 1255 ch = *fmt++; 1256 } while (is_digit(ch)); 1257 if (ch == '$') { 1258 nextarg = n; 1259 goto rflag; 1260 } 1261 goto reswitch; 1262 #ifdef FLOATING_POINT 1263 case 'L': 1264 flags |= LONGDBL; 1265 goto rflag; 1266 #endif 1267 case 'h': 1268 if (*fmt == 'h') { 1269 fmt++; 1270 flags |= CHARINT; 1271 } else { 1272 flags |= SHORTINT; 1273 } 1274 goto rflag; 1275 case 'j': 1276 flags |= MAXINT; 1277 goto rflag; 1278 case 'l': 1279 if (*fmt == 'l') { 1280 fmt++; 1281 flags |= LLONGINT; 1282 } else { 1283 flags |= LONGINT; 1284 } 1285 goto rflag; 1286 case 'q': 1287 flags |= LLONGINT; 1288 goto rflag; 1289 case 't': 1290 flags |= PTRINT; 1291 goto rflag; 1292 case 'z': 1293 flags |= SIZEINT; 1294 goto rflag; 1295 case 'c': 1296 #ifdef PRINTF_WIDE_CHAR 1297 if (flags & LONGINT) 1298 ADDTYPE(T_WINT); 1299 else 1300 #endif 1301 ADDTYPE(T_INT); 1302 break; 1303 case 'D': 1304 flags |= LONGINT; 1305 /*FALLTHROUGH*/ 1306 case 'd': 1307 case 'i': 1308 ADDSARG(); 1309 break; 1310 #ifdef FLOATING_POINT 1311 case 'a': 1312 case 'A': 1313 case 'e': 1314 case 'E': 1315 case 'f': 1316 case 'F': 1317 case 'g': 1318 case 'G': 1319 if (flags & LONGDBL) 1320 ADDTYPE(T_LONG_DOUBLE); 1321 else 1322 ADDTYPE(T_DOUBLE); 1323 break; 1324 #endif /* FLOATING_POINT */ 1325 case 'n': 1326 if (flags & LLONGINT) 1327 ADDTYPE(TP_LLONG); 1328 else if (flags & LONGINT) 1329 ADDTYPE(TP_LONG); 1330 else if (flags & SHORTINT) 1331 ADDTYPE(TP_SHORT); 1332 else if (flags & PTRINT) 1333 ADDTYPE(TP_PTRINT); 1334 else if (flags & SIZEINT) 1335 ADDTYPE(TP_SSIZEINT); 1336 else if (flags & MAXINT) 1337 ADDTYPE(TP_MAXINT); 1338 else 1339 ADDTYPE(TP_INT); 1340 continue; /* no output */ 1341 case 'O': 1342 flags |= LONGINT; 1343 /*FALLTHROUGH*/ 1344 case 'o': 1345 ADDUARG(); 1346 break; 1347 case 'p': 1348 ADDTYPE(TP_VOID); 1349 break; 1350 case 's': 1351 #ifdef PRINTF_WIDE_CHAR 1352 if (flags & LONGINT) 1353 ADDTYPE(TP_WCHAR); 1354 else 1355 #endif 1356 ADDTYPE(TP_CHAR); 1357 break; 1358 case 'U': 1359 flags |= LONGINT; 1360 /*FALLTHROUGH*/ 1361 case 'u': 1362 case 'X': 1363 case 'x': 1364 ADDUARG(); 1365 break; 1366 default: /* "%?" prints ?, unless ? is NUL */ 1367 if (ch == '\0') 1368 goto done; 1369 break; 1370 } 1371 } 1372 done: 1373 /* 1374 * Build the argument table. 1375 */ 1376 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1377 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1378 *argtable = mmap(NULL, *argtablesiz, 1379 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1380 if (*argtable == MAP_FAILED) 1381 return (-1); 1382 } 1383 1384 for (n = 1; n <= tablemax; n++) { 1385 switch (typetable[n]) { 1386 case T_UNUSED: 1387 case T_CHAR: 1388 case T_U_CHAR: 1389 case T_SHORT: 1390 case T_U_SHORT: 1391 case T_INT: 1392 (*argtable)[n].intarg = va_arg(ap, int); 1393 break; 1394 case TP_SHORT: 1395 (*argtable)[n].pshortarg = va_arg(ap, short *); 1396 break; 1397 case T_U_INT: 1398 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1399 break; 1400 case TP_INT: 1401 (*argtable)[n].pintarg = va_arg(ap, int *); 1402 break; 1403 case T_LONG: 1404 (*argtable)[n].longarg = va_arg(ap, long); 1405 break; 1406 case T_U_LONG: 1407 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1408 break; 1409 case TP_LONG: 1410 (*argtable)[n].plongarg = va_arg(ap, long *); 1411 break; 1412 case T_LLONG: 1413 (*argtable)[n].longlongarg = va_arg(ap, long long); 1414 break; 1415 case T_U_LLONG: 1416 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1417 break; 1418 case TP_LLONG: 1419 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1420 break; 1421 #ifdef FLOATING_POINT 1422 case T_DOUBLE: 1423 (*argtable)[n].doublearg = va_arg(ap, double); 1424 break; 1425 case T_LONG_DOUBLE: 1426 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1427 break; 1428 #endif 1429 case TP_CHAR: 1430 (*argtable)[n].pchararg = va_arg(ap, char *); 1431 break; 1432 case TP_VOID: 1433 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1434 break; 1435 case T_PTRINT: 1436 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1437 break; 1438 case TP_PTRINT: 1439 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1440 break; 1441 case T_SIZEINT: 1442 (*argtable)[n].sizearg = va_arg(ap, size_t); 1443 break; 1444 case T_SSIZEINT: 1445 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1446 break; 1447 case TP_SSIZEINT: 1448 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1449 break; 1450 case T_MAXINT: 1451 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1452 break; 1453 case T_MAXUINT: 1454 (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t); 1455 break; 1456 case TP_MAXINT: 1457 (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t *); 1458 break; 1459 #ifdef PRINTF_WIDE_CHAR 1460 case T_WINT: 1461 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1462 break; 1463 case TP_WCHAR: 1464 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1465 break; 1466 #endif 1467 } 1468 } 1469 goto finish; 1470 1471 overflow: 1472 errno = EOVERFLOW; 1473 ret = -1; 1474 1475 finish: 1476 if (typetable != NULL && typetable != stattypetable) { 1477 munmap(typetable, *argtablesiz); 1478 typetable = NULL; 1479 } 1480 return (ret); 1481 } 1482 1483 /* 1484 * Increase the size of the type table. 1485 */ 1486 static int 1487 __grow_type_table(unsigned char **typetable, int *tablesize) 1488 { 1489 unsigned char *oldtable = *typetable; 1490 int newsize = *tablesize * 2; 1491 1492 if (newsize < getpagesize()) 1493 newsize = getpagesize(); 1494 1495 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1496 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1497 MAP_ANON|MAP_PRIVATE, -1, 0); 1498 if (*typetable == MAP_FAILED) 1499 return (-1); 1500 bcopy(oldtable, *typetable, *tablesize); 1501 } else { 1502 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1503 MAP_ANON|MAP_PRIVATE, -1, 0); 1504 if (new == MAP_FAILED) 1505 return (-1); 1506 memmove(new, *typetable, *tablesize); 1507 munmap(*typetable, *tablesize); 1508 *typetable = new; 1509 } 1510 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1511 1512 *tablesize = newsize; 1513 return (0); 1514 } 1515 1516 1517 #ifdef FLOATING_POINT 1518 static int 1519 exponent(char *p0, int exp, int fmtch) 1520 { 1521 char *p, *t; 1522 char expbuf[MAXEXPDIG]; 1523 1524 p = p0; 1525 *p++ = fmtch; 1526 if (exp < 0) { 1527 exp = -exp; 1528 *p++ = '-'; 1529 } else 1530 *p++ = '+'; 1531 t = expbuf + MAXEXPDIG; 1532 if (exp > 9) { 1533 do { 1534 *--t = to_char(exp % 10); 1535 } while ((exp /= 10) > 9); 1536 *--t = to_char(exp); 1537 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1538 /* nothing */; 1539 } else { 1540 /* 1541 * Exponents for decimal floating point conversions 1542 * (%[eEgG]) must be at least two characters long, 1543 * whereas exponents for hexadecimal conversions can 1544 * be only one character long. 1545 */ 1546 if (fmtch == 'e' || fmtch == 'E') 1547 *p++ = '0'; 1548 *p++ = to_char(exp); 1549 } 1550 return (p - p0); 1551 } 1552 #endif /* FLOATING_POINT */ 1553