1 /* $OpenBSD: vfprintf.c,v 1.66 2014/05/03 12:36:45 deraadt Exp $ */ 2 /*- 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Chris Torek. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Actual printf innards. 36 * 37 * This code is large and complicated... 38 */ 39 40 #include <sys/types.h> 41 #include <sys/mman.h> 42 43 #include <errno.h> 44 #include <langinfo.h> 45 #include <limits.h> 46 #include <stdarg.h> 47 #include <stddef.h> 48 #include <stdio.h> 49 #include <stdint.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 #include <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 #include "gdtoa.h" 220 221 #define DEFPREC 6 222 223 static int exponent(char *, int, int); 224 #endif /* FLOATING_POINT */ 225 226 /* 227 * The size of the buffer we use as scratch space for integer 228 * conversions, among other things. Technically, we would need the 229 * most space for base 10 conversions with thousands' grouping 230 * characters between each pair of digits. 100 bytes is a 231 * conservative overestimate even for a 128-bit uintmax_t. 232 */ 233 #define BUF 100 234 235 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 236 237 238 /* 239 * Macros for converting digits to letters and vice versa 240 */ 241 #define to_digit(c) ((c) - '0') 242 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 243 #define to_char(n) ((n) + '0') 244 245 /* 246 * Flags used during conversion. 247 */ 248 #define ALT 0x0001 /* alternate form */ 249 #define LADJUST 0x0004 /* left adjustment */ 250 #define LONGDBL 0x0008 /* long double */ 251 #define LONGINT 0x0010 /* long integer */ 252 #define LLONGINT 0x0020 /* long long integer */ 253 #define SHORTINT 0x0040 /* short integer */ 254 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ 255 #define FPT 0x0100 /* Floating point number */ 256 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ 257 #define SIZEINT 0x0400 /* (signed) size_t */ 258 #define CHARINT 0x0800 /* 8 bit integer */ 259 #define MAXINT 0x1000 /* largest integer size (intmax_t) */ 260 261 int 262 vfprintf(FILE *fp, const char *fmt0, __va_list ap) 263 { 264 int ret; 265 266 FLOCKFILE(fp); 267 ret = __vfprintf(fp, fmt0, ap); 268 FUNLOCKFILE(fp); 269 return (ret); 270 } 271 272 int 273 __vfprintf(FILE *fp, const char *fmt0, __va_list ap) 274 { 275 char *fmt; /* format string */ 276 int ch; /* character from fmt */ 277 int n, n2; /* handy integers (short term usage) */ 278 char *cp; /* handy char pointer (short term usage) */ 279 struct __siov *iovp; /* for PRINT macro */ 280 int flags; /* flags as above */ 281 int ret; /* return value accumulator */ 282 int width; /* width from format (%8d), or 0 */ 283 int prec; /* precision from format; <0 for N/A */ 284 char sign; /* sign prefix (' ', '+', '-', or \0) */ 285 wchar_t wc; 286 mbstate_t ps; 287 #ifdef FLOATING_POINT 288 /* 289 * We can decompose the printed representation of floating 290 * point numbers into several parts, some of which may be empty: 291 * 292 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 293 * A B ---C--- D E F 294 * 295 * A: 'sign' holds this value if present; '\0' otherwise 296 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 297 * C: cp points to the string MMMNNN. Leading and trailing 298 * zeros are not in the string and must be added. 299 * D: expchar holds this character; '\0' if no exponent, e.g. %f 300 * F: at least two digits for decimal, at least one digit for hex 301 */ 302 char *decimal_point = NULL; 303 int signflag; /* true if float is negative */ 304 union { /* floating point arguments %[aAeEfFgG] */ 305 double dbl; 306 long double ldbl; 307 } fparg; 308 int expt; /* integer value of exponent */ 309 char expchar; /* exponent character: [eEpP\0] */ 310 char *dtoaend; /* pointer to end of converted digits */ 311 int expsize; /* character count for expstr */ 312 int lead; /* sig figs before decimal or group sep */ 313 int ndig; /* actual number of digits returned by dtoa */ 314 char expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 315 char *dtoaresult = NULL; 316 #endif 317 318 uintmax_t _umax; /* integer arguments %[diouxX] */ 319 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 320 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 321 int realsz; /* field size expanded by dprec */ 322 int size; /* size of converted field or string */ 323 const char *xdigs; /* digits for %[xX] conversion */ 324 #define NIOV 8 325 struct __suio uio; /* output information: summary */ 326 struct __siov iov[NIOV];/* ... and individual io vectors */ 327 char buf[BUF]; /* buffer with space for digits of uintmax_t */ 328 char ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 329 union arg *argtable; /* args, built due to positional arg */ 330 union arg statargtable[STATIC_ARG_TBL_SIZE]; 331 size_t argtablesiz; 332 int nextarg; /* 1-based argument index */ 333 va_list orgap; /* original argument pointer */ 334 #ifdef PRINTF_WIDE_CHAR 335 char *convbuf; /* buffer for wide to multi-byte conversion */ 336 #endif 337 338 /* 339 * Choose PADSIZE to trade efficiency vs. size. If larger printf 340 * fields occur frequently, increase PADSIZE and make the initialisers 341 * below longer. 342 */ 343 #define PADSIZE 16 /* pad chunk size */ 344 static char blanks[PADSIZE] = 345 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 346 static char zeroes[PADSIZE] = 347 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 348 349 static const char xdigs_lower[16] = "0123456789abcdef"; 350 static const char xdigs_upper[16] = "0123456789ABCDEF"; 351 352 /* 353 * BEWARE, these `goto error' on error, and PAD uses `n'. 354 */ 355 #define PRINT(ptr, len) do { \ 356 iovp->iov_base = (ptr); \ 357 iovp->iov_len = (len); \ 358 uio.uio_resid += (len); \ 359 iovp++; \ 360 if (++uio.uio_iovcnt >= NIOV) { \ 361 if (__sprint(fp, &uio)) \ 362 goto error; \ 363 iovp = iov; \ 364 } \ 365 } while (0) 366 #define PAD(howmany, with) do { \ 367 if ((n = (howmany)) > 0) { \ 368 while (n > PADSIZE) { \ 369 PRINT(with, PADSIZE); \ 370 n -= PADSIZE; \ 371 } \ 372 PRINT(with, n); \ 373 } \ 374 } while (0) 375 #define PRINTANDPAD(p, ep, len, with) do { \ 376 n2 = (ep) - (p); \ 377 if (n2 > (len)) \ 378 n2 = (len); \ 379 if (n2 > 0) \ 380 PRINT((p), n2); \ 381 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 382 } while(0) 383 #define FLUSH() do { \ 384 if (uio.uio_resid && __sprint(fp, &uio)) \ 385 goto error; \ 386 uio.uio_iovcnt = 0; \ 387 iovp = iov; \ 388 } while (0) 389 390 /* 391 * To extend shorts properly, we need both signed and unsigned 392 * argument extraction methods. 393 */ 394 #define SARG() \ 395 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 396 flags&LLONGINT ? GETARG(long long) : \ 397 flags&LONGINT ? GETARG(long) : \ 398 flags&PTRINT ? GETARG(ptrdiff_t) : \ 399 flags&SIZEINT ? GETARG(ssize_t) : \ 400 flags&SHORTINT ? (short)GETARG(int) : \ 401 flags&CHARINT ? (signed char)GETARG(int) : \ 402 GETARG(int))) 403 #define UARG() \ 404 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 405 flags&LLONGINT ? GETARG(unsigned long long) : \ 406 flags&LONGINT ? GETARG(unsigned long) : \ 407 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 408 flags&SIZEINT ? GETARG(size_t) : \ 409 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 410 flags&CHARINT ? (unsigned char)GETARG(int) : \ 411 GETARG(unsigned int))) 412 413 /* 414 * Append a digit to a value and check for overflow. 415 */ 416 #define APPEND_DIGIT(val, dig) do { \ 417 if ((val) > INT_MAX / 10) \ 418 goto overflow; \ 419 (val) *= 10; \ 420 if ((val) > INT_MAX - to_digit((dig))) \ 421 goto overflow; \ 422 (val) += to_digit((dig)); \ 423 } while (0) 424 425 /* 426 * Get * arguments, including the form *nn$. Preserve the nextarg 427 * that the argument can be gotten once the type is determined. 428 */ 429 #define GETASTER(val) \ 430 n2 = 0; \ 431 cp = fmt; \ 432 while (is_digit(*cp)) { \ 433 APPEND_DIGIT(n2, *cp); \ 434 cp++; \ 435 } \ 436 if (*cp == '$') { \ 437 int hold = nextarg; \ 438 if (argtable == NULL) { \ 439 argtable = statargtable; \ 440 __find_arguments(fmt0, orgap, &argtable, &argtablesiz); \ 441 } \ 442 nextarg = n2; \ 443 val = GETARG(int); \ 444 nextarg = hold; \ 445 fmt = ++cp; \ 446 } else { \ 447 val = GETARG(int); \ 448 } 449 450 /* 451 * Get the argument indexed by nextarg. If the argument table is 452 * built, use it to get the argument. If its not, get the next 453 * argument (and arguments must be gotten sequentially). 454 */ 455 #define GETARG(type) \ 456 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 457 (nextarg++, va_arg(ap, type))) 458 459 _SET_ORIENTATION(fp, -1); 460 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ 461 if (cantwrite(fp)) { 462 errno = EBADF; 463 return (EOF); 464 } 465 466 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 467 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 468 fp->_file >= 0) 469 return (__sbprintf(fp, fmt0, ap)); 470 471 fmt = (char *)fmt0; 472 argtable = NULL; 473 nextarg = 1; 474 va_copy(orgap, ap); 475 uio.uio_iov = iovp = iov; 476 uio.uio_resid = 0; 477 uio.uio_iovcnt = 0; 478 ret = 0; 479 #ifdef PRINTF_WIDE_CHAR 480 convbuf = NULL; 481 #endif 482 483 memset(&ps, 0, sizeof(ps)); 484 /* 485 * Scan the format for conversions (`%' character). 486 */ 487 for (;;) { 488 cp = fmt; 489 while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) { 490 fmt += n; 491 if (wc == '%') { 492 fmt--; 493 break; 494 } 495 } 496 if (fmt != cp) { 497 ptrdiff_t m = fmt - cp; 498 if (m < 0 || m > INT_MAX - ret) 499 goto overflow; 500 PRINT(cp, m); 501 ret += m; 502 } 503 if (n <= 0) 504 goto done; 505 fmt++; /* skip over '%' */ 506 507 flags = 0; 508 dprec = 0; 509 width = 0; 510 prec = -1; 511 sign = '\0'; 512 ox[1] = '\0'; 513 514 rflag: ch = *fmt++; 515 reswitch: switch (ch) { 516 case ' ': 517 /* 518 * ``If the space and + flags both appear, the space 519 * flag will be ignored.'' 520 * -- ANSI X3J11 521 */ 522 if (!sign) 523 sign = ' '; 524 goto rflag; 525 case '#': 526 flags |= ALT; 527 goto rflag; 528 case '\'': 529 /* grouping not implemented */ 530 goto rflag; 531 case '*': 532 /* 533 * ``A negative field width argument is taken as a 534 * - flag followed by a positive field width.'' 535 * -- ANSI X3J11 536 * They don't exclude field widths read from args. 537 */ 538 GETASTER(width); 539 if (width >= 0) 540 goto rflag; 541 if (width == INT_MIN) 542 goto overflow; 543 width = -width; 544 /* FALLTHROUGH */ 545 case '-': 546 flags |= LADJUST; 547 goto rflag; 548 case '+': 549 sign = '+'; 550 goto rflag; 551 case '.': 552 if ((ch = *fmt++) == '*') { 553 GETASTER(n); 554 prec = n < 0 ? -1 : n; 555 goto rflag; 556 } 557 n = 0; 558 while (is_digit(ch)) { 559 APPEND_DIGIT(n, ch); 560 ch = *fmt++; 561 } 562 if (ch == '$') { 563 nextarg = n; 564 if (argtable == NULL) { 565 argtable = statargtable; 566 __find_arguments(fmt0, orgap, 567 &argtable, &argtablesiz); 568 } 569 goto rflag; 570 } 571 prec = n; 572 goto reswitch; 573 case '0': 574 /* 575 * ``Note that 0 is taken as a flag, not as the 576 * beginning of a field width.'' 577 * -- ANSI X3J11 578 */ 579 flags |= ZEROPAD; 580 goto rflag; 581 case '1': case '2': case '3': case '4': 582 case '5': case '6': case '7': case '8': case '9': 583 n = 0; 584 do { 585 APPEND_DIGIT(n, ch); 586 ch = *fmt++; 587 } while (is_digit(ch)); 588 if (ch == '$') { 589 nextarg = n; 590 if (argtable == NULL) { 591 argtable = statargtable; 592 __find_arguments(fmt0, orgap, 593 &argtable, &argtablesiz); 594 } 595 goto rflag; 596 } 597 width = n; 598 goto reswitch; 599 #ifdef FLOATING_POINT 600 case 'L': 601 flags |= LONGDBL; 602 goto rflag; 603 #endif 604 case 'h': 605 if (*fmt == 'h') { 606 fmt++; 607 flags |= CHARINT; 608 } else { 609 flags |= SHORTINT; 610 } 611 goto rflag; 612 case 'j': 613 flags |= MAXINT; 614 goto rflag; 615 case 'l': 616 if (*fmt == 'l') { 617 fmt++; 618 flags |= LLONGINT; 619 } else { 620 flags |= LONGINT; 621 } 622 goto rflag; 623 case 'q': 624 flags |= LLONGINT; 625 goto rflag; 626 case 't': 627 flags |= PTRINT; 628 goto rflag; 629 case 'z': 630 flags |= SIZEINT; 631 goto rflag; 632 case 'c': 633 #ifdef PRINTF_WIDE_CHAR 634 if (flags & LONGINT) { 635 mbstate_t mbs; 636 size_t mbseqlen; 637 638 memset(&mbs, 0, sizeof(mbs)); 639 mbseqlen = wcrtomb(buf, 640 (wchar_t)GETARG(wint_t), &mbs); 641 if (mbseqlen == (size_t)-1) { 642 fp->_flags |= __SERR; 643 errno = EILSEQ; 644 goto error; 645 } 646 cp = buf; 647 size = (int)mbseqlen; 648 } else { 649 #endif 650 *(cp = buf) = GETARG(int); 651 size = 1; 652 #ifdef PRINTF_WIDE_CHAR 653 } 654 #endif 655 sign = '\0'; 656 break; 657 case 'D': 658 flags |= LONGINT; 659 /*FALLTHROUGH*/ 660 case 'd': 661 case 'i': 662 _umax = SARG(); 663 if ((intmax_t)_umax < 0) { 664 _umax = -_umax; 665 sign = '-'; 666 } 667 base = DEC; 668 goto number; 669 #ifdef FLOATING_POINT 670 case 'a': 671 case 'A': 672 if (ch == 'a') { 673 ox[1] = 'x'; 674 xdigs = xdigs_lower; 675 expchar = 'p'; 676 } else { 677 ox[1] = 'X'; 678 xdigs = xdigs_upper; 679 expchar = 'P'; 680 } 681 if (prec >= 0) 682 prec++; 683 if (dtoaresult) 684 __freedtoa(dtoaresult); 685 if (flags & LONGDBL) { 686 fparg.ldbl = GETARG(long double); 687 dtoaresult = cp = 688 __hldtoa(fparg.ldbl, xdigs, prec, 689 &expt, &signflag, &dtoaend); 690 if (dtoaresult == NULL) { 691 errno = ENOMEM; 692 goto error; 693 } 694 } else { 695 fparg.dbl = GETARG(double); 696 dtoaresult = cp = 697 __hdtoa(fparg.dbl, xdigs, prec, 698 &expt, &signflag, &dtoaend); 699 if (dtoaresult == NULL) { 700 errno = ENOMEM; 701 goto error; 702 } 703 } 704 if (prec < 0) 705 prec = dtoaend - cp; 706 if (expt == INT_MAX) 707 ox[1] = '\0'; 708 goto fp_common; 709 case 'e': 710 case 'E': 711 expchar = ch; 712 if (prec < 0) /* account for digit before decpt */ 713 prec = DEFPREC + 1; 714 else 715 prec++; 716 goto fp_begin; 717 case 'f': 718 case 'F': 719 expchar = '\0'; 720 goto fp_begin; 721 case 'g': 722 case 'G': 723 expchar = ch - ('g' - 'e'); 724 if (prec == 0) 725 prec = 1; 726 fp_begin: 727 if (prec < 0) 728 prec = DEFPREC; 729 if (dtoaresult) 730 __freedtoa(dtoaresult); 731 if (flags & LONGDBL) { 732 fparg.ldbl = GETARG(long double); 733 dtoaresult = cp = 734 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 735 &expt, &signflag, &dtoaend); 736 if (dtoaresult == NULL) { 737 errno = ENOMEM; 738 goto error; 739 } 740 } else { 741 fparg.dbl = GETARG(double); 742 dtoaresult = cp = 743 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 744 &expt, &signflag, &dtoaend); 745 if (dtoaresult == NULL) { 746 errno = ENOMEM; 747 goto error; 748 } 749 if (expt == 9999) 750 expt = INT_MAX; 751 } 752 fp_common: 753 if (signflag) 754 sign = '-'; 755 if (expt == INT_MAX) { /* inf or nan */ 756 if (*cp == 'N') { 757 cp = (ch >= 'a') ? "nan" : "NAN"; 758 sign = '\0'; 759 } else 760 cp = (ch >= 'a') ? "inf" : "INF"; 761 size = 3; 762 flags &= ~ZEROPAD; 763 break; 764 } 765 flags |= FPT; 766 ndig = dtoaend - cp; 767 if (ch == 'g' || ch == 'G') { 768 if (expt > -4 && expt <= prec) { 769 /* Make %[gG] smell like %[fF] */ 770 expchar = '\0'; 771 if (flags & ALT) 772 prec -= expt; 773 else 774 prec = ndig - expt; 775 if (prec < 0) 776 prec = 0; 777 } else { 778 /* 779 * Make %[gG] smell like %[eE], but 780 * trim trailing zeroes if no # flag. 781 */ 782 if (!(flags & ALT)) 783 prec = ndig; 784 } 785 } 786 if (expchar) { 787 expsize = exponent(expstr, expt - 1, expchar); 788 size = expsize + prec; 789 if (prec > 1 || flags & ALT) 790 ++size; 791 } else { 792 /* space for digits before decimal point */ 793 if (expt > 0) 794 size = expt; 795 else /* "0" */ 796 size = 1; 797 /* space for decimal pt and following digits */ 798 if (prec || flags & ALT) 799 size += prec + 1; 800 lead = expt; 801 } 802 break; 803 #endif /* FLOATING_POINT */ 804 #ifndef NO_PRINTF_PERCENT_N 805 case 'n': 806 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 #endif /* NO_PRINTF_PERCENT_N */ 824 case 'O': 825 flags |= LONGINT; 826 /*FALLTHROUGH*/ 827 case 'o': 828 _umax = UARG(); 829 base = OCT; 830 goto nosign; 831 case 'p': 832 /* 833 * ``The argument shall be a pointer to void. The 834 * value of the pointer is converted to a sequence 835 * of printable characters, in an implementation- 836 * defined manner.'' 837 * -- ANSI X3J11 838 */ 839 /* NOSTRICT */ 840 _umax = (u_long)GETARG(void *); 841 base = HEX; 842 xdigs = xdigs_lower; 843 ox[1] = 'x'; 844 goto nosign; 845 case 's': 846 #ifdef PRINTF_WIDE_CHAR 847 if (flags & LONGINT) { 848 wchar_t *wcp; 849 850 if (convbuf != NULL) { 851 free(convbuf); 852 convbuf = NULL; 853 } 854 if ((wcp = GETARG(wchar_t *)) == NULL) { 855 cp = "(null)"; 856 } else { 857 convbuf = __wcsconv(wcp, prec); 858 if (convbuf == NULL) { 859 fp->_flags = __SERR; 860 goto error; 861 } 862 cp = convbuf; 863 } 864 } else 865 #endif /* PRINTF_WIDE_CHAR */ 866 if ((cp = GETARG(char *)) == NULL) 867 cp = "(null)"; 868 if (prec >= 0) { 869 /* 870 * can't use strlen; can only look for the 871 * NUL in the first `prec' characters, and 872 * strlen() will go further. 873 */ 874 char *p = memchr(cp, 0, prec); 875 876 size = p ? (p - cp) : prec; 877 } else { 878 size_t len; 879 880 if ((len = strlen(cp)) > INT_MAX) 881 goto overflow; 882 size = (int)len; 883 } 884 sign = '\0'; 885 break; 886 case 'U': 887 flags |= LONGINT; 888 /*FALLTHROUGH*/ 889 case 'u': 890 _umax = UARG(); 891 base = DEC; 892 goto nosign; 893 case 'X': 894 xdigs = xdigs_upper; 895 goto hex; 896 case 'x': 897 xdigs = xdigs_lower; 898 hex: _umax = UARG(); 899 base = HEX; 900 /* leading 0x/X only if non-zero */ 901 if (flags & ALT && _umax != 0) 902 ox[1] = ch; 903 904 /* unsigned conversions */ 905 nosign: sign = '\0'; 906 /* 907 * ``... diouXx conversions ... if a precision is 908 * specified, the 0 flag will be ignored.'' 909 * -- ANSI X3J11 910 */ 911 number: if ((dprec = prec) >= 0) 912 flags &= ~ZEROPAD; 913 914 /* 915 * ``The result of converting a zero value with an 916 * explicit precision of zero is no characters.'' 917 * -- ANSI X3J11 918 */ 919 cp = buf + BUF; 920 if (_umax != 0 || prec != 0) { 921 /* 922 * Unsigned mod is hard, and unsigned mod 923 * by a constant is easier than that by 924 * a variable; hence this switch. 925 */ 926 switch (base) { 927 case OCT: 928 do { 929 *--cp = to_char(_umax & 7); 930 _umax >>= 3; 931 } while (_umax); 932 /* handle octal leading 0 */ 933 if (flags & ALT && *cp != '0') 934 *--cp = '0'; 935 break; 936 937 case DEC: 938 /* many numbers are 1 digit */ 939 while (_umax >= 10) { 940 *--cp = to_char(_umax % 10); 941 _umax /= 10; 942 } 943 *--cp = to_char(_umax); 944 break; 945 946 case HEX: 947 do { 948 *--cp = xdigs[_umax & 15]; 949 _umax >>= 4; 950 } while (_umax); 951 break; 952 953 default: 954 cp = "bug in vfprintf: bad base"; 955 size = strlen(cp); 956 goto skipsize; 957 } 958 } 959 size = buf + BUF - cp; 960 if (size > BUF) /* should never happen */ 961 abort(); 962 skipsize: 963 break; 964 default: /* "%?" prints ?, unless ? is NUL */ 965 if (ch == '\0') 966 goto done; 967 /* pretend it was %c with argument ch */ 968 cp = buf; 969 *cp = ch; 970 size = 1; 971 sign = '\0'; 972 break; 973 } 974 975 /* 976 * All reasonable formats wind up here. At this point, `cp' 977 * points to a string which (if not flags&LADJUST) should be 978 * padded out to `width' places. If flags&ZEROPAD, it should 979 * first be prefixed by any sign or other prefix; otherwise, 980 * it should be blank padded before the prefix is emitted. 981 * After any left-hand padding and prefixing, emit zeroes 982 * required by a decimal %[diouxX] precision, then print the 983 * string proper, then emit zeroes required by any leftover 984 * floating precision; finally, if LADJUST, pad with blanks. 985 * 986 * Compute actual size, so we know how much to pad. 987 * size excludes decimal prec; realsz includes it. 988 */ 989 realsz = dprec > size ? dprec : size; 990 if (sign) 991 realsz++; 992 if (ox[1]) 993 realsz+= 2; 994 995 /* right-adjusting blank padding */ 996 if ((flags & (LADJUST|ZEROPAD)) == 0) 997 PAD(width - realsz, blanks); 998 999 /* prefix */ 1000 if (sign) 1001 PRINT(&sign, 1); 1002 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1003 ox[0] = '0'; 1004 PRINT(ox, 2); 1005 } 1006 1007 /* right-adjusting zero padding */ 1008 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1009 PAD(width - realsz, zeroes); 1010 1011 /* leading zeroes from decimal precision */ 1012 PAD(dprec - size, zeroes); 1013 1014 /* the string or number proper */ 1015 #ifdef FLOATING_POINT 1016 if ((flags & FPT) == 0) { 1017 PRINT(cp, size); 1018 } else { /* glue together f_p fragments */ 1019 if (decimal_point == NULL) 1020 decimal_point = nl_langinfo(RADIXCHAR); 1021 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1022 if (expt <= 0) { 1023 PRINT(zeroes, 1); 1024 if (prec || flags & ALT) 1025 PRINT(decimal_point, 1); 1026 PAD(-expt, zeroes); 1027 /* already handled initial 0's */ 1028 prec += expt; 1029 } else { 1030 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1031 cp += lead; 1032 if (prec || flags & ALT) 1033 PRINT(decimal_point, 1); 1034 } 1035 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1036 } else { /* %[eE] or sufficiently long %[gG] */ 1037 if (prec > 1 || flags & ALT) { 1038 buf[0] = *cp++; 1039 buf[1] = *decimal_point; 1040 PRINT(buf, 2); 1041 PRINT(cp, ndig-1); 1042 PAD(prec - ndig, zeroes); 1043 } else { /* XeYYY */ 1044 PRINT(cp, 1); 1045 } 1046 PRINT(expstr, expsize); 1047 } 1048 } 1049 #else 1050 PRINT(cp, size); 1051 #endif 1052 /* left-adjusting padding (always blank) */ 1053 if (flags & LADJUST) 1054 PAD(width - realsz, blanks); 1055 1056 /* finally, adjust ret */ 1057 if (width < realsz) 1058 width = realsz; 1059 if (width > INT_MAX - ret) 1060 goto overflow; 1061 ret += width; 1062 1063 FLUSH(); /* copy out the I/O vectors */ 1064 } 1065 done: 1066 FLUSH(); 1067 error: 1068 va_end(orgap); 1069 if (__sferror(fp)) 1070 ret = -1; 1071 goto finish; 1072 1073 overflow: 1074 errno = ENOMEM; 1075 ret = -1; 1076 1077 finish: 1078 #ifdef PRINTF_WIDE_CHAR 1079 if (convbuf) 1080 free(convbuf); 1081 #endif 1082 #ifdef FLOATING_POINT 1083 if (dtoaresult) 1084 __freedtoa(dtoaresult); 1085 #endif 1086 if (argtable != NULL && argtable != statargtable) { 1087 munmap(argtable, argtablesiz); 1088 argtable = NULL; 1089 } 1090 return (ret); 1091 } 1092 1093 /* 1094 * Type ids for argument type table. 1095 */ 1096 #define T_UNUSED 0 1097 #define T_SHORT 1 1098 #define T_U_SHORT 2 1099 #define TP_SHORT 3 1100 #define T_INT 4 1101 #define T_U_INT 5 1102 #define TP_INT 6 1103 #define T_LONG 7 1104 #define T_U_LONG 8 1105 #define TP_LONG 9 1106 #define T_LLONG 10 1107 #define T_U_LLONG 11 1108 #define TP_LLONG 12 1109 #define T_DOUBLE 13 1110 #define T_LONG_DOUBLE 14 1111 #define TP_CHAR 15 1112 #define TP_VOID 16 1113 #define T_PTRINT 17 1114 #define TP_PTRINT 18 1115 #define T_SIZEINT 19 1116 #define T_SSIZEINT 20 1117 #define TP_SSIZEINT 21 1118 #define T_MAXINT 22 1119 #define T_MAXUINT 23 1120 #define TP_MAXINT 24 1121 #define T_CHAR 25 1122 #define T_U_CHAR 26 1123 #define T_WINT 27 1124 #define TP_WCHAR 28 1125 1126 /* 1127 * Find all arguments when a positional parameter is encountered. Returns a 1128 * table, indexed by argument number, of pointers to each arguments. The 1129 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1130 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1131 * used since we are attempting to make snprintf thread safe, and alloca is 1132 * problematic since we have nested functions..) 1133 */ 1134 static int 1135 __find_arguments(const char *fmt0, va_list ap, union arg **argtable, 1136 size_t *argtablesiz) 1137 { 1138 char *fmt; /* format string */ 1139 int ch; /* character from fmt */ 1140 int n, n2; /* handy integer (short term usage) */ 1141 char *cp; /* handy char pointer (short term usage) */ 1142 int flags; /* flags as above */ 1143 unsigned char *typetable; /* table of types */ 1144 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1145 int tablesize; /* current size of type table */ 1146 int tablemax; /* largest used index in table */ 1147 int nextarg; /* 1-based argument index */ 1148 int ret = 0; /* return value */ 1149 wchar_t wc; 1150 mbstate_t ps; 1151 1152 /* 1153 * Add an argument type to the table, expanding if necessary. 1154 */ 1155 #define ADDTYPE(type) \ 1156 ((nextarg >= tablesize) ? \ 1157 __grow_type_table(&typetable, &tablesize) : 0, \ 1158 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1159 typetable[nextarg++] = type) 1160 1161 #define ADDSARG() \ 1162 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1163 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1164 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1165 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1166 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1167 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1168 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1169 1170 #define ADDUARG() \ 1171 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1172 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1173 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1174 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1175 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1176 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1177 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1178 1179 /* 1180 * Add * arguments to the type array. 1181 */ 1182 #define ADDASTER() \ 1183 n2 = 0; \ 1184 cp = fmt; \ 1185 while (is_digit(*cp)) { \ 1186 APPEND_DIGIT(n2, *cp); \ 1187 cp++; \ 1188 } \ 1189 if (*cp == '$') { \ 1190 int hold = nextarg; \ 1191 nextarg = n2; \ 1192 ADDTYPE(T_INT); \ 1193 nextarg = hold; \ 1194 fmt = ++cp; \ 1195 } else { \ 1196 ADDTYPE(T_INT); \ 1197 } 1198 fmt = (char *)fmt0; 1199 typetable = stattypetable; 1200 tablesize = STATIC_ARG_TBL_SIZE; 1201 tablemax = 0; 1202 nextarg = 1; 1203 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1204 memset(&ps, 0, sizeof(ps)); 1205 1206 /* 1207 * Scan the format for conversions (`%' character). 1208 */ 1209 for (;;) { 1210 cp = fmt; 1211 while ((n = mbrtowc(&wc, fmt, MB_CUR_MAX, &ps)) > 0) { 1212 fmt += n; 1213 if (wc == '%') { 1214 fmt--; 1215 break; 1216 } 1217 } 1218 if (n <= 0) 1219 goto done; 1220 fmt++; /* skip over '%' */ 1221 1222 flags = 0; 1223 1224 rflag: ch = *fmt++; 1225 reswitch: switch (ch) { 1226 case ' ': 1227 case '#': 1228 case '\'': 1229 goto rflag; 1230 case '*': 1231 ADDASTER(); 1232 goto rflag; 1233 case '-': 1234 case '+': 1235 goto rflag; 1236 case '.': 1237 if ((ch = *fmt++) == '*') { 1238 ADDASTER(); 1239 goto rflag; 1240 } 1241 while (is_digit(ch)) { 1242 ch = *fmt++; 1243 } 1244 goto reswitch; 1245 case '0': 1246 goto rflag; 1247 case '1': case '2': case '3': case '4': 1248 case '5': case '6': case '7': case '8': case '9': 1249 n = 0; 1250 do { 1251 APPEND_DIGIT(n ,ch); 1252 ch = *fmt++; 1253 } while (is_digit(ch)); 1254 if (ch == '$') { 1255 nextarg = n; 1256 goto rflag; 1257 } 1258 goto reswitch; 1259 #ifdef FLOATING_POINT 1260 case 'L': 1261 flags |= LONGDBL; 1262 goto rflag; 1263 #endif 1264 case 'h': 1265 if (*fmt == 'h') { 1266 fmt++; 1267 flags |= CHARINT; 1268 } else { 1269 flags |= SHORTINT; 1270 } 1271 goto rflag; 1272 case 'j': 1273 flags |= MAXINT; 1274 goto rflag; 1275 case 'l': 1276 if (*fmt == 'l') { 1277 fmt++; 1278 flags |= LLONGINT; 1279 } else { 1280 flags |= LONGINT; 1281 } 1282 goto rflag; 1283 case 'q': 1284 flags |= LLONGINT; 1285 goto rflag; 1286 case 't': 1287 flags |= PTRINT; 1288 goto rflag; 1289 case 'z': 1290 flags |= SIZEINT; 1291 goto rflag; 1292 case 'c': 1293 #ifdef PRINTF_WIDE_CHAR 1294 if (flags & LONGINT) 1295 ADDTYPE(T_WINT); 1296 else 1297 #endif 1298 ADDTYPE(T_INT); 1299 break; 1300 case 'D': 1301 flags |= LONGINT; 1302 /*FALLTHROUGH*/ 1303 case 'd': 1304 case 'i': 1305 ADDSARG(); 1306 break; 1307 #ifdef FLOATING_POINT 1308 case 'a': 1309 case 'A': 1310 case 'e': 1311 case 'E': 1312 case 'f': 1313 case 'F': 1314 case 'g': 1315 case 'G': 1316 if (flags & LONGDBL) 1317 ADDTYPE(T_LONG_DOUBLE); 1318 else 1319 ADDTYPE(T_DOUBLE); 1320 break; 1321 #endif /* FLOATING_POINT */ 1322 #ifndef NO_PRINTF_PERCENT_N 1323 case 'n': 1324 if (flags & LLONGINT) 1325 ADDTYPE(TP_LLONG); 1326 else if (flags & LONGINT) 1327 ADDTYPE(TP_LONG); 1328 else if (flags & SHORTINT) 1329 ADDTYPE(TP_SHORT); 1330 else if (flags & PTRINT) 1331 ADDTYPE(TP_PTRINT); 1332 else if (flags & SIZEINT) 1333 ADDTYPE(TP_SSIZEINT); 1334 else if (flags & MAXINT) 1335 ADDTYPE(TP_MAXINT); 1336 else 1337 ADDTYPE(TP_INT); 1338 continue; /* no output */ 1339 #endif /* NO_PRINTF_PERCENT_N */ 1340 case 'O': 1341 flags |= LONGINT; 1342 /*FALLTHROUGH*/ 1343 case 'o': 1344 ADDUARG(); 1345 break; 1346 case 'p': 1347 ADDTYPE(TP_VOID); 1348 break; 1349 case 's': 1350 #ifdef PRINTF_WIDE_CHAR 1351 if (flags & LONGINT) 1352 ADDTYPE(TP_WCHAR); 1353 else 1354 #endif 1355 ADDTYPE(TP_CHAR); 1356 break; 1357 case 'U': 1358 flags |= LONGINT; 1359 /*FALLTHROUGH*/ 1360 case 'u': 1361 case 'X': 1362 case 'x': 1363 ADDUARG(); 1364 break; 1365 default: /* "%?" prints ?, unless ? is NUL */ 1366 if (ch == '\0') 1367 goto done; 1368 break; 1369 } 1370 } 1371 done: 1372 /* 1373 * Build the argument table. 1374 */ 1375 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1376 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1377 *argtable = mmap(NULL, *argtablesiz, 1378 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1379 if (*argtable == MAP_FAILED) 1380 return (-1); 1381 } 1382 1383 #if 0 1384 /* XXX is this required? */ 1385 (*argtable)[0].intarg = 0; 1386 #endif 1387 for (n = 1; n <= tablemax; n++) { 1388 switch (typetable[n]) { 1389 case T_UNUSED: 1390 case T_CHAR: 1391 case T_U_CHAR: 1392 case T_SHORT: 1393 case T_U_SHORT: 1394 case T_INT: 1395 (*argtable)[n].intarg = va_arg(ap, int); 1396 break; 1397 case TP_SHORT: 1398 (*argtable)[n].pshortarg = va_arg(ap, short *); 1399 break; 1400 case T_U_INT: 1401 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1402 break; 1403 case TP_INT: 1404 (*argtable)[n].pintarg = va_arg(ap, int *); 1405 break; 1406 case T_LONG: 1407 (*argtable)[n].longarg = va_arg(ap, long); 1408 break; 1409 case T_U_LONG: 1410 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1411 break; 1412 case TP_LONG: 1413 (*argtable)[n].plongarg = va_arg(ap, long *); 1414 break; 1415 case T_LLONG: 1416 (*argtable)[n].longlongarg = va_arg(ap, long long); 1417 break; 1418 case T_U_LLONG: 1419 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1420 break; 1421 case TP_LLONG: 1422 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1423 break; 1424 #ifdef FLOATING_POINT 1425 case T_DOUBLE: 1426 (*argtable)[n].doublearg = va_arg(ap, double); 1427 break; 1428 case T_LONG_DOUBLE: 1429 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1430 break; 1431 #endif 1432 case TP_CHAR: 1433 (*argtable)[n].pchararg = va_arg(ap, char *); 1434 break; 1435 case TP_VOID: 1436 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1437 break; 1438 case T_PTRINT: 1439 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1440 break; 1441 case TP_PTRINT: 1442 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1443 break; 1444 case T_SIZEINT: 1445 (*argtable)[n].sizearg = va_arg(ap, size_t); 1446 break; 1447 case T_SSIZEINT: 1448 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1449 break; 1450 case TP_SSIZEINT: 1451 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1452 break; 1453 case T_MAXINT: 1454 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1455 break; 1456 case T_MAXUINT: 1457 (*argtable)[n].uintmaxarg = va_arg(ap, uintmax_t); 1458 break; 1459 case TP_MAXINT: 1460 (*argtable)[n].pintmaxarg = va_arg(ap, intmax_t *); 1461 break; 1462 #ifdef PRINTF_WIDE_CHAR 1463 case T_WINT: 1464 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1465 break; 1466 case TP_WCHAR: 1467 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1468 break; 1469 #endif 1470 } 1471 } 1472 goto finish; 1473 1474 overflow: 1475 errno = ENOMEM; 1476 ret = -1; 1477 1478 finish: 1479 if (typetable != NULL && typetable != stattypetable) { 1480 munmap(typetable, *argtablesiz); 1481 typetable = NULL; 1482 } 1483 return (ret); 1484 } 1485 1486 /* 1487 * Increase the size of the type table. 1488 */ 1489 static int 1490 __grow_type_table(unsigned char **typetable, int *tablesize) 1491 { 1492 unsigned char *oldtable = *typetable; 1493 int newsize = *tablesize * 2; 1494 1495 if (newsize < getpagesize()) 1496 newsize = getpagesize(); 1497 1498 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1499 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1500 MAP_ANON|MAP_PRIVATE, -1, 0); 1501 if (*typetable == MAP_FAILED) 1502 return (-1); 1503 bcopy(oldtable, *typetable, *tablesize); 1504 } else { 1505 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1506 MAP_ANON|MAP_PRIVATE, -1, 0); 1507 if (new == MAP_FAILED) 1508 return (-1); 1509 memmove(new, *typetable, *tablesize); 1510 munmap(*typetable, *tablesize); 1511 *typetable = new; 1512 } 1513 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1514 1515 *tablesize = newsize; 1516 return (0); 1517 } 1518 1519 1520 #ifdef FLOATING_POINT 1521 static int 1522 exponent(char *p0, int exp, int fmtch) 1523 { 1524 char *p, *t; 1525 char expbuf[MAXEXPDIG]; 1526 1527 p = p0; 1528 *p++ = fmtch; 1529 if (exp < 0) { 1530 exp = -exp; 1531 *p++ = '-'; 1532 } else 1533 *p++ = '+'; 1534 t = expbuf + MAXEXPDIG; 1535 if (exp > 9) { 1536 do { 1537 *--t = to_char(exp % 10); 1538 } while ((exp /= 10) > 9); 1539 *--t = to_char(exp); 1540 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1541 /* nothing */; 1542 } else { 1543 /* 1544 * Exponents for decimal floating point conversions 1545 * (%[eEgG]) must be at least two characters long, 1546 * whereas exponents for hexadecimal conversions can 1547 * be only one character long. 1548 */ 1549 if (fmtch == 'e' || fmtch == 'E') 1550 *p++ = '0'; 1551 *p++ = to_char(exp); 1552 } 1553 return (p - p0); 1554 } 1555 #endif /* FLOATING_POINT */ 1556
