1 /* $OpenBSD: vfprintf.c,v 1.63 2013/03/02 19:40:08 guenther 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 <wchar.h> 54 55 #include "local.h" 56 #include "fvwrite.h" 57 58 union arg { 59 int intarg; 60 unsigned int uintarg; 61 long longarg; 62 unsigned long ulongarg; 63 long long longlongarg; 64 unsigned long long ulonglongarg; 65 ptrdiff_t ptrdiffarg; 66 size_t sizearg; 67 ssize_t ssizearg; 68 intmax_t intmaxarg; 69 uintmax_t uintmaxarg; 70 void *pvoidarg; 71 char *pchararg; 72 signed char *pschararg; 73 short *pshortarg; 74 int *pintarg; 75 long *plongarg; 76 long long *plonglongarg; 77 ptrdiff_t *pptrdiffarg; 78 ssize_t *pssizearg; 79 intmax_t *pintmaxarg; 80 #ifdef FLOATING_POINT 81 double doublearg; 82 long double longdoublearg; 83 #endif 84 #ifdef PRINTF_WIDE_CHAR 85 wint_t wintarg; 86 wchar_t *pwchararg; 87 #endif 88 }; 89 90 static int __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 91 size_t *argtablesiz); 92 static int __grow_type_table(unsigned char **typetable, int *tablesize); 93 94 /* 95 * Flush out all the vectors defined by the given uio, 96 * then reset it so that it can be reused. 97 */ 98 static int 99 __sprint(FILE *fp, struct __suio *uio) 100 { 101 int err; 102 103 if (uio->uio_resid == 0) { 104 uio->uio_iovcnt = 0; 105 return (0); 106 } 107 err = __sfvwrite(fp, uio); 108 uio->uio_resid = 0; 109 uio->uio_iovcnt = 0; 110 return (err); 111 } 112 113 /* 114 * Helper function for `fprintf to unbuffered unix file': creates a 115 * temporary buffer. We only work on write-only files; this avoids 116 * worries about ungetc buffers and so forth. 117 */ 118 static int 119 __sbprintf(FILE *fp, const char *fmt, va_list ap) 120 { 121 int ret; 122 FILE fake; 123 struct __sfileext fakeext; 124 unsigned char buf[BUFSIZ]; 125 126 _FILEEXT_SETUP(&fake, &fakeext); 127 /* copy the important variables */ 128 fake._flags = fp->_flags & ~__SNBF; 129 fake._file = fp->_file; 130 fake._cookie = fp->_cookie; 131 fake._write = fp->_write; 132 133 /* set up the buffer */ 134 fake._bf._base = fake._p = buf; 135 fake._bf._size = fake._w = sizeof(buf); 136 fake._lbfsize = 0; /* not actually used, but Just In Case */ 137 138 /* do the work, then copy any error status */ 139 ret = __vfprintf(&fake, fmt, ap); 140 if (ret >= 0 && __sflush(&fake)) 141 ret = EOF; 142 if (fake._flags & __SERR) 143 fp->_flags |= __SERR; 144 return (ret); 145 } 146 147 #ifdef PRINTF_WIDE_CHAR 148 /* 149 * Convert a wide character string argument for the %ls format to a multibyte 150 * string representation. If not -1, prec specifies the maximum number of 151 * bytes to output, and also means that we can't assume that the wide char 152 * string is null-terminated. 153 */ 154 static char * 155 __wcsconv(wchar_t *wcsarg, int prec) 156 { 157 mbstate_t mbs; 158 char buf[MB_LEN_MAX]; 159 wchar_t *p; 160 char *convbuf; 161 size_t clen, nbytes; 162 163 /* Allocate space for the maximum number of bytes we could output. */ 164 if (prec < 0) { 165 memset(&mbs, 0, sizeof(mbs)); 166 p = wcsarg; 167 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs); 168 if (nbytes == (size_t)-1) { 169 errno = EILSEQ; 170 return (NULL); 171 } 172 } else { 173 /* 174 * Optimisation: if the output precision is small enough, 175 * just allocate enough memory for the maximum instead of 176 * scanning the string. 177 */ 178 if (prec < 128) 179 nbytes = prec; 180 else { 181 nbytes = 0; 182 p = wcsarg; 183 memset(&mbs, 0, sizeof(mbs)); 184 for (;;) { 185 clen = wcrtomb(buf, *p++, &mbs); 186 if (clen == 0 || clen == (size_t)-1 || 187 nbytes + clen > (size_t)prec) 188 break; 189 nbytes += clen; 190 } 191 if (clen == (size_t)-1) { 192 errno = EILSEQ; 193 return (NULL); 194 } 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 errno = EILSEQ; 207 return (NULL); 208 } 209 convbuf[nbytes] = '\0'; 210 return (convbuf); 211 } 212 #endif 213 214 #ifdef FLOATING_POINT 215 #include <float.h> 216 #include <locale.h> 217 #include <math.h> 218 #include "floatio.h" 219 220 #define DEFPREC 6 221 222 extern char *__dtoa(double, int, int, int *, int *, char **); 223 extern void __freedtoa(char *); 224 static int exponent(char *, int, int); 225 #endif /* FLOATING_POINT */ 226 227 /* 228 * The size of the buffer we use as scratch space for integer 229 * conversions, among other things. Technically, we would need the 230 * most space for base 10 conversions with thousands' grouping 231 * characters between each pair of digits. 100 bytes is a 232 * conservative overestimate even for a 128-bit uintmax_t. 233 */ 234 #define BUF 100 235 236 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 237 238 239 /* 240 * Macros for converting digits to letters and vice versa 241 */ 242 #define to_digit(c) ((c) - '0') 243 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 244 #define to_char(n) ((n) + '0') 245 246 /* 247 * Flags used during conversion. 248 */ 249 #define ALT 0x0001 /* alternate form */ 250 #define LADJUST 0x0004 /* left adjustment */ 251 #define LONGDBL 0x0008 /* long double */ 252 #define LONGINT 0x0010 /* long integer */ 253 #define LLONGINT 0x0020 /* long long integer */ 254 #define SHORTINT 0x0040 /* short integer */ 255 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ 256 #define FPT 0x0100 /* Floating point number */ 257 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ 258 #define SIZEINT 0x0400 /* (signed) size_t */ 259 #define CHARINT 0x0800 /* 8 bit integer */ 260 #define MAXINT 0x1000 /* largest integer size (intmax_t) */ 261 262 int 263 vfprintf(FILE *fp, const char *fmt0, __va_list ap) 264 { 265 int ret; 266 267 FLOCKFILE(fp); 268 ret = __vfprintf(fp, fmt0, ap); 269 FUNLOCKFILE(fp); 270 return (ret); 271 } 272 273 int 274 __vfprintf(FILE *fp, const char *fmt0, __va_list ap) 275 { 276 char *fmt; /* format string */ 277 int ch; /* character from fmt */ 278 int n, n2; /* handy integers (short term usage) */ 279 char *cp; /* handy char pointer (short term usage) */ 280 struct __siov *iovp; /* for PRINT macro */ 281 int flags; /* flags as above */ 282 int ret; /* return value accumulator */ 283 int width; /* width from format (%8d), or 0 */ 284 int prec; /* precision from format; <0 for N/A */ 285 char sign; /* sign prefix (' ', '+', '-', or \0) */ 286 wchar_t wc; 287 mbstate_t ps; 288 #ifdef FLOATING_POINT 289 /* 290 * We can decompose the printed representation of floating 291 * point numbers into several parts, some of which may be empty: 292 * 293 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 294 * A B ---C--- D E F 295 * 296 * A: 'sign' holds this value if present; '\0' otherwise 297 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 298 * C: cp points to the string MMMNNN. Leading and trailing 299 * zeros are not in the string and must be added. 300 * D: expchar holds this character; '\0' if no exponent, e.g. %f 301 * F: at least two digits for decimal, at least one digit for hex 302 */ 303 char *decimal_point = NULL; 304 int signflag; /* true if float is negative */ 305 union { /* floating point arguments %[aAeEfFgG] */ 306 double dbl; 307 long double ldbl; 308 } fparg; 309 int expt; /* integer value of exponent */ 310 char expchar; /* exponent character: [eEpP\0] */ 311 char *dtoaend; /* pointer to end of converted digits */ 312 int expsize; /* character count for expstr */ 313 int lead; /* sig figs before decimal or group sep */ 314 int ndig; /* actual number of digits returned by dtoa */ 315 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 316 char *dtoaresult = NULL; 317 #endif 318 319 uintmax_t _umax; /* integer arguments %[diouxX] */ 320 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 321 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 322 int realsz; /* field size expanded by dprec */ 323 int size; /* size of converted field or string */ 324 const char *xdigs; /* digits for %[xX] conversion */ 325 #define NIOV 8 326 struct __suio uio; /* output information: summary */ 327 struct __siov iov[NIOV];/* ... and individual io vectors */ 328 char buf[BUF]; /* buffer with space for digits of uintmax_t */ 329 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 330 union arg *argtable; /* args, built due to positional arg */ 331 union arg statargtable[STATIC_ARG_TBL_SIZE]; 332 size_t argtablesiz; 333 int nextarg; /* 1-based argument index */ 334 va_list orgap; /* original argument pointer */ 335 #ifdef PRINTF_WIDE_CHAR 336 char *convbuf; /* buffer for wide to multi-byte conversion */ 337 #endif 338 339 /* 340 * Choose PADSIZE to trade efficiency vs. size. If larger printf 341 * fields occur frequently, increase PADSIZE and make the initialisers 342 * below longer. 343 */ 344 #define PADSIZE 16 /* pad chunk size */ 345 static char blanks[PADSIZE] = 346 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 347 static char zeroes[PADSIZE] = 348 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 349 350 static const char xdigs_lower[16] = "0123456789abcdef"; 351 static const char xdigs_upper[16] = "0123456789ABCDEF"; 352 353 /* 354 * BEWARE, these `goto error' on error, and PAD uses `n'. 355 */ 356 #define PRINT(ptr, len) do { \ 357 iovp->iov_base = (ptr); \ 358 iovp->iov_len = (len); \ 359 uio.uio_resid += (len); \ 360 iovp++; \ 361 if (++uio.uio_iovcnt >= NIOV) { \ 362 if (__sprint(fp, &uio)) \ 363 goto error; \ 364 iovp = iov; \ 365 } \ 366 } while (0) 367 #define PAD(howmany, with) do { \ 368 if ((n = (howmany)) > 0) { \ 369 while (n > PADSIZE) { \ 370 PRINT(with, PADSIZE); \ 371 n -= PADSIZE; \ 372 } \ 373 PRINT(with, n); \ 374 } \ 375 } while (0) 376 #define PRINTANDPAD(p, ep, len, with) do { \ 377 n2 = (ep) - (p); \ 378 if (n2 > (len)) \ 379 n2 = (len); \ 380 if (n2 > 0) \ 381 PRINT((p), n2); \ 382 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 383 } while(0) 384 #define FLUSH() do { \ 385 if (uio.uio_resid && __sprint(fp, &uio)) \ 386 goto error; \ 387 uio.uio_iovcnt = 0; \ 388 iovp = iov; \ 389 } while (0) 390 391 /* 392 * To extend shorts properly, we need both signed and unsigned 393 * argument extraction methods. 394 */ 395 #define SARG() \ 396 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 397 flags&LLONGINT ? GETARG(long long) : \ 398 flags&LONGINT ? GETARG(long) : \ 399 flags&PTRINT ? GETARG(ptrdiff_t) : \ 400 flags&SIZEINT ? GETARG(ssize_t) : \ 401 flags&SHORTINT ? (short)GETARG(int) : \ 402 flags&CHARINT ? (__signed char)GETARG(int) : \ 403 GETARG(int))) 404 #define UARG() \ 405 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 406 flags&LLONGINT ? GETARG(unsigned long long) : \ 407 flags&LONGINT ? GETARG(unsigned long) : \ 408 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 409 flags&SIZEINT ? GETARG(size_t) : \ 410 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 411 flags&CHARINT ? (unsigned char)GETARG(int) : \ 412 GETARG(unsigned int))) 413 414 /* 415 * Append a digit to a value and check for overflow. 416 */ 417 #define APPEND_DIGIT(val, dig) do { \ 418 if ((val) > INT_MAX / 10) \ 419 goto overflow; \ 420 (val) *= 10; \ 421 if ((val) > INT_MAX - to_digit((dig))) \ 422 goto overflow; \ 423 (val) += to_digit((dig)); \ 424 } while (0) 425 426 /* 427 * Get * arguments, including the form *nn$. Preserve the nextarg 428 * that the argument can be gotten once the type is determined. 429 */ 430 #define GETASTER(val) \ 431 n2 = 0; \ 432 cp = fmt; \ 433 while (is_digit(*cp)) { \ 434 APPEND_DIGIT(n2, *cp); \ 435 cp++; \ 436 } \ 437 if (*cp == '$') { \ 438 int hold = nextarg; \ 439 if (argtable == NULL) { \ 440 argtable = statargtable; \ 441 __find_arguments(fmt0, orgap, &argtable, &argtablesiz); \ 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 cp = fmt; 490 while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) { 491 fmt += n; 492 if (wc == '%') { 493 fmt--; 494 break; 495 } 496 } 497 if (fmt != cp) { 498 ptrdiff_t m = fmt - cp; 499 if (m < 0 || m > INT_MAX - ret) 500 goto overflow; 501 PRINT(cp, m); 502 ret += m; 503 } 504 if (n <= 0) 505 goto done; 506 fmt++; /* skip over '%' */ 507 508 flags = 0; 509 dprec = 0; 510 width = 0; 511 prec = -1; 512 sign = '\0'; 513 ox[1] = '\0'; 514 515 rflag: ch = *fmt++; 516 reswitch: switch (ch) { 517 case ' ': 518 /* 519 * ``If the space and + flags both appear, the space 520 * flag will be ignored.'' 521 * -- ANSI X3J11 522 */ 523 if (!sign) 524 sign = ' '; 525 goto rflag; 526 case '#': 527 flags |= ALT; 528 goto rflag; 529 case '\'': 530 /* grouping not implemented */ 531 goto rflag; 532 case '*': 533 /* 534 * ``A negative field width argument is taken as a 535 * - flag followed by a positive field width.'' 536 * -- ANSI X3J11 537 * They don't exclude field widths read from args. 538 */ 539 GETASTER(width); 540 if (width >= 0) 541 goto rflag; 542 if (width == INT_MIN) 543 goto overflow; 544 width = -width; 545 /* FALLTHROUGH */ 546 case '-': 547 flags |= LADJUST; 548 goto rflag; 549 case '+': 550 sign = '+'; 551 goto rflag; 552 case '.': 553 if ((ch = *fmt++) == '*') { 554 GETASTER(n); 555 prec = n < 0 ? -1 : n; 556 goto rflag; 557 } 558 n = 0; 559 while (is_digit(ch)) { 560 APPEND_DIGIT(n, ch); 561 ch = *fmt++; 562 } 563 if (ch == '$') { 564 nextarg = n; 565 if (argtable == NULL) { 566 argtable = statargtable; 567 __find_arguments(fmt0, orgap, 568 &argtable, &argtablesiz); 569 } 570 goto rflag; 571 } 572 prec = n; 573 goto reswitch; 574 case '0': 575 /* 576 * ``Note that 0 is taken as a flag, not as the 577 * beginning of a field width.'' 578 * -- ANSI X3J11 579 */ 580 flags |= ZEROPAD; 581 goto rflag; 582 case '1': case '2': case '3': case '4': 583 case '5': case '6': case '7': case '8': case '9': 584 n = 0; 585 do { 586 APPEND_DIGIT(n, ch); 587 ch = *fmt++; 588 } while (is_digit(ch)); 589 if (ch == '$') { 590 nextarg = n; 591 if (argtable == NULL) { 592 argtable = statargtable; 593 __find_arguments(fmt0, orgap, 594 &argtable, &argtablesiz); 595 } 596 goto rflag; 597 } 598 width = n; 599 goto reswitch; 600 #ifdef FLOATING_POINT 601 case 'L': 602 flags |= LONGDBL; 603 goto rflag; 604 #endif 605 case 'h': 606 if (*fmt == 'h') { 607 fmt++; 608 flags |= CHARINT; 609 } else { 610 flags |= SHORTINT; 611 } 612 goto rflag; 613 case 'j': 614 flags |= MAXINT; 615 goto rflag; 616 case 'l': 617 if (*fmt == 'l') { 618 fmt++; 619 flags |= LLONGINT; 620 } else { 621 flags |= LONGINT; 622 } 623 goto rflag; 624 case 'q': 625 flags |= LLONGINT; 626 goto rflag; 627 case 't': 628 flags |= PTRINT; 629 goto rflag; 630 case 'z': 631 flags |= SIZEINT; 632 goto rflag; 633 case 'c': 634 #ifdef PRINTF_WIDE_CHAR 635 if (flags & LONGINT) { 636 mbstate_t mbs; 637 size_t mbseqlen; 638 639 memset(&mbs, 0, sizeof(mbs)); 640 mbseqlen = wcrtomb(buf, 641 (wchar_t)GETARG(wint_t), &mbs); 642 if (mbseqlen == (size_t)-1) { 643 fp->_flags |= __SERR; 644 errno = EILSEQ; 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 sign = '\0'; 760 } else 761 cp = (ch >= 'a') ? "inf" : "INF"; 762 size = 3; 763 flags &= ~ZEROPAD; 764 break; 765 } 766 flags |= FPT; 767 ndig = dtoaend - cp; 768 if (ch == 'g' || ch == 'G') { 769 if (expt > -4 && expt <= prec) { 770 /* Make %[gG] smell like %[fF] */ 771 expchar = '\0'; 772 if (flags & ALT) 773 prec -= expt; 774 else 775 prec = ndig - expt; 776 if (prec < 0) 777 prec = 0; 778 } else { 779 /* 780 * Make %[gG] smell like %[eE], but 781 * trim trailing zeroes if no # flag. 782 */ 783 if (!(flags & ALT)) 784 prec = ndig; 785 } 786 } 787 if (expchar) { 788 expsize = exponent(expstr, expt - 1, expchar); 789 size = expsize + prec; 790 if (prec > 1 || flags & ALT) 791 ++size; 792 } else { 793 /* space for digits before decimal point */ 794 if (expt > 0) 795 size = expt; 796 else /* "0" */ 797 size = 1; 798 /* space for decimal pt and following digits */ 799 if (prec || flags & ALT) 800 size += prec + 1; 801 lead = expt; 802 } 803 break; 804 #endif /* FLOATING_POINT */ 805 case 'n': 806 if (flags & LLONGINT) 807 *GETARG(long long *) = ret; 808 else if (flags & LONGINT) 809 *GETARG(long *) = ret; 810 else if (flags & SHORTINT) 811 *GETARG(short *) = ret; 812 else if (flags & CHARINT) 813 *GETARG(__signed char *) = ret; 814 else if (flags & PTRINT) 815 *GETARG(ptrdiff_t *) = ret; 816 else if (flags & SIZEINT) 817 *GETARG(ssize_t *) = ret; 818 else if (flags & MAXINT) 819 *GETARG(intmax_t *) = ret; 820 else 821 *GETARG(int *) = ret; 822 continue; /* no output */ 823 case 'O': 824 flags |= LONGINT; 825 /*FALLTHROUGH*/ 826 case 'o': 827 _umax = UARG(); 828 base = OCT; 829 goto nosign; 830 case 'p': 831 /* 832 * ``The argument shall be a pointer to void. The 833 * value of the pointer is converted to a sequence 834 * of printable characters, in an implementation- 835 * defined manner.'' 836 * -- ANSI X3J11 837 */ 838 /* NOSTRICT */ 839 _umax = (u_long)GETARG(void *); 840 base = HEX; 841 xdigs = xdigs_lower; 842 ox[1] = 'x'; 843 goto nosign; 844 case 's': 845 #ifdef PRINTF_WIDE_CHAR 846 if (flags & LONGINT) { 847 wchar_t *wcp; 848 849 if (convbuf != NULL) { 850 free(convbuf); 851 convbuf = NULL; 852 } 853 if ((wcp = GETARG(wchar_t *)) == NULL) { 854 cp = "(null)"; 855 } else { 856 convbuf = __wcsconv(wcp, prec); 857 if (convbuf == NULL) { 858 fp->_flags = __SERR; 859 goto error; 860 } 861 cp = convbuf; 862 } 863 } else 864 #endif /* PRINTF_WIDE_CHAR */ 865 if ((cp = GETARG(char *)) == NULL) 866 cp = "(null)"; 867 if (prec >= 0) { 868 /* 869 * can't use strlen; can only look for the 870 * NUL in the first `prec' characters, and 871 * strlen() will go further. 872 */ 873 char *p = memchr(cp, 0, prec); 874 875 size = p ? (p - cp) : prec; 876 } else { 877 size_t len; 878 879 if ((len = strlen(cp)) > INT_MAX) 880 goto overflow; 881 size = (int)len; 882 } 883 sign = '\0'; 884 break; 885 case 'U': 886 flags |= LONGINT; 887 /*FALLTHROUGH*/ 888 case 'u': 889 _umax = UARG(); 890 base = DEC; 891 goto nosign; 892 case 'X': 893 xdigs = xdigs_upper; 894 goto hex; 895 case 'x': 896 xdigs = xdigs_lower; 897 hex: _umax = UARG(); 898 base = HEX; 899 /* leading 0x/X only if non-zero */ 900 if (flags & ALT && _umax != 0) 901 ox[1] = ch; 902 903 /* unsigned conversions */ 904 nosign: sign = '\0'; 905 /* 906 * ``... diouXx conversions ... if a precision is 907 * specified, the 0 flag will be ignored.'' 908 * -- ANSI X3J11 909 */ 910 number: if ((dprec = prec) >= 0) 911 flags &= ~ZEROPAD; 912 913 /* 914 * ``The result of converting a zero value with an 915 * explicit precision of zero is no characters.'' 916 * -- ANSI X3J11 917 */ 918 cp = buf + BUF; 919 if (_umax != 0 || prec != 0) { 920 /* 921 * Unsigned mod is hard, and unsigned mod 922 * by a constant is easier than that by 923 * a variable; hence this switch. 924 */ 925 switch (base) { 926 case OCT: 927 do { 928 *--cp = to_char(_umax & 7); 929 _umax >>= 3; 930 } while (_umax); 931 /* handle octal leading 0 */ 932 if (flags & ALT && *cp != '0') 933 *--cp = '0'; 934 break; 935 936 case DEC: 937 /* many numbers are 1 digit */ 938 while (_umax >= 10) { 939 *--cp = to_char(_umax % 10); 940 _umax /= 10; 941 } 942 *--cp = to_char(_umax); 943 break; 944 945 case HEX: 946 do { 947 *--cp = xdigs[_umax & 15]; 948 _umax >>= 4; 949 } while (_umax); 950 break; 951 952 default: 953 cp = "bug in vfprintf: bad base"; 954 size = strlen(cp); 955 goto skipsize; 956 } 957 } 958 size = buf + BUF - cp; 959 if (size > BUF) /* should never happen */ 960 abort(); 961 skipsize: 962 break; 963 default: /* "%?" prints ?, unless ? is NUL */ 964 if (ch == '\0') 965 goto done; 966 /* pretend it was %c with argument ch */ 967 cp = buf; 968 *cp = ch; 969 size = 1; 970 sign = '\0'; 971 break; 972 } 973 974 /* 975 * All reasonable formats wind up here. At this point, `cp' 976 * points to a string which (if not flags&LADJUST) should be 977 * padded out to `width' places. If flags&ZEROPAD, it should 978 * first be prefixed by any sign or other prefix; otherwise, 979 * it should be blank padded before the prefix is emitted. 980 * After any left-hand padding and prefixing, emit zeroes 981 * required by a decimal %[diouxX] precision, then print the 982 * string proper, then emit zeroes required by any leftover 983 * floating precision; finally, if LADJUST, pad with blanks. 984 * 985 * Compute actual size, so we know how much to pad. 986 * size excludes decimal prec; realsz includes it. 987 */ 988 realsz = dprec > size ? dprec : size; 989 if (sign) 990 realsz++; 991 if (ox[1]) 992 realsz+= 2; 993 994 /* right-adjusting blank padding */ 995 if ((flags & (LADJUST|ZEROPAD)) == 0) 996 PAD(width - realsz, blanks); 997 998 /* prefix */ 999 if (sign) 1000 PRINT(&sign, 1); 1001 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1002 ox[0] = '0'; 1003 PRINT(ox, 2); 1004 } 1005 1006 /* right-adjusting zero padding */ 1007 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1008 PAD(width - realsz, zeroes); 1009 1010 /* leading zeroes from decimal precision */ 1011 PAD(dprec - size, zeroes); 1012 1013 /* the string or number proper */ 1014 #ifdef FLOATING_POINT 1015 if ((flags & FPT) == 0) { 1016 PRINT(cp, size); 1017 } else { /* glue together f_p fragments */ 1018 if (decimal_point == NULL) 1019 decimal_point = nl_langinfo(RADIXCHAR); 1020 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1021 if (expt <= 0) { 1022 PRINT(zeroes, 1); 1023 if (prec || flags & ALT) 1024 PRINT(decimal_point, 1); 1025 PAD(-expt, zeroes); 1026 /* already handled initial 0's */ 1027 prec += expt; 1028 } else { 1029 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1030 cp += lead; 1031 if (prec || flags & ALT) 1032 PRINT(decimal_point, 1); 1033 } 1034 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1035 } else { /* %[eE] or sufficiently long %[gG] */ 1036 if (prec > 1 || flags & ALT) { 1037 buf[0] = *cp++; 1038 buf[1] = *decimal_point; 1039 PRINT(buf, 2); 1040 PRINT(cp, ndig-1); 1041 PAD(prec - ndig, zeroes); 1042 } else { /* XeYYY */ 1043 PRINT(cp, 1); 1044 } 1045 PRINT(expstr, expsize); 1046 } 1047 } 1048 #else 1049 PRINT(cp, size); 1050 #endif 1051 /* left-adjusting padding (always blank) */ 1052 if (flags & LADJUST) 1053 PAD(width - realsz, blanks); 1054 1055 /* finally, adjust ret */ 1056 if (width < realsz) 1057 width = realsz; 1058 if (width > INT_MAX - ret) 1059 goto overflow; 1060 ret += width; 1061 1062 FLUSH(); /* copy out the I/O vectors */ 1063 } 1064 done: 1065 FLUSH(); 1066 error: 1067 va_end(orgap); 1068 if (__sferror(fp)) 1069 ret = -1; 1070 goto finish; 1071 1072 overflow: 1073 errno = ENOMEM; 1074 ret = -1; 1075 1076 finish: 1077 #ifdef PRINTF_WIDE_CHAR 1078 if (convbuf) 1079 free(convbuf); 1080 #endif 1081 #ifdef FLOATING_POINT 1082 if (dtoaresult) 1083 __freedtoa(dtoaresult); 1084 #endif 1085 if (argtable != NULL && argtable != statargtable) { 1086 munmap(argtable, argtablesiz); 1087 argtable = NULL; 1088 } 1089 return (ret); 1090 } 1091 1092 /* 1093 * Type ids for argument type table. 1094 */ 1095 #define T_UNUSED 0 1096 #define T_SHORT 1 1097 #define T_U_SHORT 2 1098 #define TP_SHORT 3 1099 #define T_INT 4 1100 #define T_U_INT 5 1101 #define TP_INT 6 1102 #define T_LONG 7 1103 #define T_U_LONG 8 1104 #define TP_LONG 9 1105 #define T_LLONG 10 1106 #define T_U_LLONG 11 1107 #define TP_LLONG 12 1108 #define T_DOUBLE 13 1109 #define T_LONG_DOUBLE 14 1110 #define TP_CHAR 15 1111 #define TP_VOID 16 1112 #define T_PTRINT 17 1113 #define TP_PTRINT 18 1114 #define T_SIZEINT 19 1115 #define T_SSIZEINT 20 1116 #define TP_SSIZEINT 21 1117 #define T_MAXINT 22 1118 #define T_MAXUINT 23 1119 #define TP_MAXINT 24 1120 #define T_CHAR 25 1121 #define T_U_CHAR 26 1122 #define T_WINT 27 1123 #define TP_WCHAR 28 1124 1125 /* 1126 * Find all arguments when a positional parameter is encountered. Returns a 1127 * table, indexed by argument number, of pointers to each arguments. The 1128 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1129 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1130 * used since we are attempting to make snprintf thread safe, and alloca is 1131 * problematic since we have nested functions..) 1132 */ 1133 static int 1134 __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1135 size_t *argtablesiz) 1136 { 1137 char *fmt; /* format string */ 1138 int ch; /* character from fmt */ 1139 int n, n2; /* handy integer (short term usage) */ 1140 char *cp; /* handy char pointer (short term usage) */ 1141 int flags; /* flags as above */ 1142 unsigned char *typetable; /* table of types */ 1143 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1144 int tablesize; /* current size of type table */ 1145 int tablemax; /* largest used index in table */ 1146 int nextarg; /* 1-based argument index */ 1147 int ret = 0; /* return value */ 1148 wchar_t wc; 1149 mbstate_t ps; 1150 1151 /* 1152 * Add an argument type to the table, expanding if necessary. 1153 */ 1154 #define ADDTYPE(type) \ 1155 ((nextarg >= tablesize) ? \ 1156 __grow_type_table(&typetable, &tablesize) : 0, \ 1157 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1158 typetable[nextarg++] = type) 1159 1160 #define ADDSARG() \ 1161 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1162 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1163 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1164 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1165 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1166 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1167 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1168 1169 #define ADDUARG() \ 1170 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1171 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1172 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1173 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1174 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1175 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1176 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1177 1178 /* 1179 * Add * arguments to the type array. 1180 */ 1181 #define ADDASTER() \ 1182 n2 = 0; \ 1183 cp = fmt; \ 1184 while (is_digit(*cp)) { \ 1185 APPEND_DIGIT(n2, *cp); \ 1186 cp++; \ 1187 } \ 1188 if (*cp == '$') { \ 1189 int hold = nextarg; \ 1190 nextarg = n2; \ 1191 ADDTYPE(T_INT); \ 1192 nextarg = hold; \ 1193 fmt = ++cp; \ 1194 } else { \ 1195 ADDTYPE(T_INT); \ 1196 } 1197 fmt = (char *)fmt0; 1198 typetable = stattypetable; 1199 tablesize = STATIC_ARG_TBL_SIZE; 1200 tablemax = 0; 1201 nextarg = 1; 1202 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1203 memset(&ps, 0, sizeof(ps)); 1204 1205 /* 1206 * Scan the format for conversions (`%' character). 1207 */ 1208 for (;;) { 1209 cp = fmt; 1210 while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) { 1211 fmt += n; 1212 if (wc == '%') { 1213 fmt--; 1214 break; 1215 } 1216 } 1217 if (n <= 0) 1218 goto done; 1219 fmt++; /* skip over '%' */ 1220 1221 flags = 0; 1222 1223 rflag: ch = *fmt++; 1224 reswitch: switch (ch) { 1225 case ' ': 1226 case '#': 1227 case '\'': 1228 goto rflag; 1229 case '*': 1230 ADDASTER(); 1231 goto rflag; 1232 case '-': 1233 case '+': 1234 goto rflag; 1235 case '.': 1236 if ((ch = *fmt++) == '*') { 1237 ADDASTER(); 1238 goto rflag; 1239 } 1240 while (is_digit(ch)) { 1241 ch = *fmt++; 1242 } 1243 goto reswitch; 1244 case '0': 1245 goto rflag; 1246 case '1': case '2': case '3': case '4': 1247 case '5': case '6': case '7': case '8': case '9': 1248 n = 0; 1249 do { 1250 APPEND_DIGIT(n ,ch); 1251 ch = *fmt++; 1252 } while (is_digit(ch)); 1253 if (ch == '$') { 1254 nextarg = n; 1255 goto rflag; 1256 } 1257 goto reswitch; 1258 #ifdef FLOATING_POINT 1259 case 'L': 1260 flags |= LONGDBL; 1261 goto rflag; 1262 #endif 1263 case 'h': 1264 if (*fmt == 'h') { 1265 fmt++; 1266 flags |= CHARINT; 1267 } else { 1268 flags |= SHORTINT; 1269 } 1270 goto rflag; 1271 case 'j': 1272 flags |= MAXINT; 1273 goto rflag; 1274 case 'l': 1275 if (*fmt == 'l') { 1276 fmt++; 1277 flags |= LLONGINT; 1278 } else { 1279 flags |= LONGINT; 1280 } 1281 goto rflag; 1282 case 'q': 1283 flags |= LLONGINT; 1284 goto rflag; 1285 case 't': 1286 flags |= PTRINT; 1287 goto rflag; 1288 case 'z': 1289 flags |= SIZEINT; 1290 goto rflag; 1291 case 'c': 1292 #ifdef PRINTF_WIDE_CHAR 1293 if (flags & LONGINT) 1294 ADDTYPE(T_WINT); 1295 else 1296 #endif 1297 ADDTYPE(T_INT); 1298 break; 1299 case 'D': 1300 flags |= LONGINT; 1301 /*FALLTHROUGH*/ 1302 case 'd': 1303 case 'i': 1304 ADDSARG(); 1305 break; 1306 #ifdef FLOATING_POINT 1307 case 'a': 1308 case 'A': 1309 case 'e': 1310 case 'E': 1311 case 'f': 1312 case 'F': 1313 case 'g': 1314 case 'G': 1315 if (flags & LONGDBL) 1316 ADDTYPE(T_LONG_DOUBLE); 1317 else 1318 ADDTYPE(T_DOUBLE); 1319 break; 1320 #endif /* FLOATING_POINT */ 1321 case 'n': 1322 if (flags & LLONGINT) 1323 ADDTYPE(TP_LLONG); 1324 else if (flags & LONGINT) 1325 ADDTYPE(TP_LONG); 1326 else if (flags & SHORTINT) 1327 ADDTYPE(TP_SHORT); 1328 else if (flags & PTRINT) 1329 ADDTYPE(TP_PTRINT); 1330 else if (flags & SIZEINT) 1331 ADDTYPE(TP_SSIZEINT); 1332 else if (flags & MAXINT) 1333 ADDTYPE(TP_MAXINT); 1334 else 1335 ADDTYPE(TP_INT); 1336 continue; /* no output */ 1337 case 'O': 1338 flags |= LONGINT; 1339 /*FALLTHROUGH*/ 1340 case 'o': 1341 ADDUARG(); 1342 break; 1343 case 'p': 1344 ADDTYPE(TP_VOID); 1345 break; 1346 case 's': 1347 #ifdef PRINTF_WIDE_CHAR 1348 if (flags & LONGINT) 1349 ADDTYPE(TP_WCHAR); 1350 else 1351 #endif 1352 ADDTYPE(TP_CHAR); 1353 break; 1354 case 'U': 1355 flags |= LONGINT; 1356 /*FALLTHROUGH*/ 1357 case 'u': 1358 case 'X': 1359 case 'x': 1360 ADDUARG(); 1361 break; 1362 default: /* "%?" prints ?, unless ? is NUL */ 1363 if (ch == '\0') 1364 goto done; 1365 break; 1366 } 1367 } 1368 done: 1369 /* 1370 * Build the argument table. 1371 */ 1372 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1373 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1374 *argtable = mmap(NULL, *argtablesiz, 1375 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1376 if (*argtable == MAP_FAILED) 1377 return (-1); 1378 } 1379 1380 #if 0 1381 /* XXX is this required? */ 1382 (*argtable)[0].intarg = 0; 1383 #endif 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 = ENOMEM; 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