1 /* $OpenBSD: vfwprintf.c,v 1.20 2020/10/27 21:06:57 deraadt Exp $ */ 2 /*- 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Chris Torek. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Actual wprintf 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 <syslog.h> 53 #include <unistd.h> 54 55 #include "local.h" 56 #include "fvwrite.h" 57 58 static const char n_msg[] = ": *wprintf used %n"; 59 static int n_report; 60 61 union arg { 62 int intarg; 63 unsigned int uintarg; 64 long longarg; 65 unsigned long ulongarg; 66 long long longlongarg; 67 unsigned long long ulonglongarg; 68 ptrdiff_t ptrdiffarg; 69 size_t sizearg; 70 ssize_t ssizearg; 71 intmax_t intmaxarg; 72 uintmax_t uintmaxarg; 73 void *pvoidarg; 74 char *pchararg; 75 signed char *pschararg; 76 short *pshortarg; 77 int *pintarg; 78 long *plongarg; 79 long long *plonglongarg; 80 ptrdiff_t *pptrdiffarg; 81 ssize_t *pssizearg; 82 intmax_t *pintmaxarg; 83 #ifdef FLOATING_POINT 84 double doublearg; 85 long double longdoublearg; 86 #endif 87 wint_t wintarg; 88 wchar_t *pwchararg; 89 }; 90 91 static int __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable, 92 size_t *argtablesiz); 93 static int __grow_type_table(unsigned char **typetable, int *tablesize); 94 95 /* 96 * Helper function for `fprintf to unbuffered unix file': creates a 97 * temporary buffer. We only work on write-only files; this avoids 98 * worries about ungetc buffers and so forth. 99 */ 100 static int 101 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap) 102 { 103 int ret; 104 FILE fake; 105 struct __sfileext fakeext; 106 unsigned char buf[BUFSIZ]; 107 108 _FILEEXT_SETUP(&fake, &fakeext); 109 /* copy the important variables */ 110 fake._flags = fp->_flags & ~__SNBF; 111 fake._file = fp->_file; 112 fake._cookie = fp->_cookie; 113 fake._write = fp->_write; 114 115 /* set up the buffer */ 116 fake._bf._base = fake._p = buf; 117 fake._bf._size = fake._w = sizeof(buf); 118 fake._lbfsize = 0; /* not actually used, but Just In Case */ 119 120 /* do the work, then copy any error status */ 121 ret = __vfwprintf(&fake, fmt, ap); 122 if (ret >= 0 && __sflush(&fake)) 123 ret = EOF; 124 if (fake._flags & __SERR) 125 fp->_flags |= __SERR; 126 return (ret); 127 } 128 129 /* 130 * Like __fputwc_unlock, but handles fake string (__SSTR) files properly. 131 * File must already be locked. 132 */ 133 static wint_t 134 __xfputwc(wchar_t wc, FILE *fp) 135 { 136 mbstate_t mbs; 137 char buf[MB_LEN_MAX]; 138 struct __suio uio; 139 struct __siov iov; 140 size_t len; 141 142 if ((fp->_flags & __SSTR) == 0) 143 return (__fputwc_unlock(wc, fp)); 144 145 bzero(&mbs, sizeof(mbs)); 146 len = wcrtomb(buf, wc, &mbs); 147 if (len == (size_t)-1) { 148 fp->_flags |= __SERR; 149 errno = EILSEQ; 150 return (WEOF); 151 } 152 uio.uio_iov = &iov; 153 uio.uio_resid = len; 154 uio.uio_iovcnt = 1; 155 iov.iov_base = buf; 156 iov.iov_len = len; 157 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF); 158 } 159 160 /* 161 * Convert a multibyte character string argument for the %s format to a wide 162 * string representation. ``prec'' specifies the maximum number of bytes 163 * to output. If ``prec'' is greater than or equal to zero, we can't assume 164 * that the multibyte character string ends in a null character. 165 * 166 * Returns NULL on failure. 167 * To find out what happened check errno for ENOMEM, EILSEQ and EINVAL. 168 */ 169 static wchar_t * 170 __mbsconv(char *mbsarg, int prec) 171 { 172 mbstate_t mbs; 173 wchar_t *convbuf, *wcp; 174 const char *p; 175 size_t insize, nchars, nconv; 176 177 if (mbsarg == NULL) 178 return (NULL); 179 180 /* 181 * Supplied argument is a multibyte string; convert it to wide 182 * characters first. 183 */ 184 if (prec >= 0) { 185 /* 186 * String is not guaranteed to be NUL-terminated. Find the 187 * number of characters to print. 188 */ 189 p = mbsarg; 190 insize = nchars = nconv = 0; 191 bzero(&mbs, sizeof(mbs)); 192 while (nchars != (size_t)prec) { 193 nconv = mbrlen(p, MB_CUR_MAX, &mbs); 194 if (nconv == (size_t)0 || nconv == (size_t)-1 || 195 nconv == (size_t)-2) 196 break; 197 p += nconv; 198 nchars++; 199 insize += nconv; 200 } 201 if (nconv == (size_t)-1 || nconv == (size_t)-2) 202 return (NULL); 203 } else 204 insize = strlen(mbsarg); 205 206 /* 207 * Allocate buffer for the result and perform the conversion, 208 * converting at most `size' bytes of the input multibyte string to 209 * wide characters for printing. 210 */ 211 convbuf = calloc(insize + 1, sizeof(*convbuf)); 212 if (convbuf == NULL) 213 return (NULL); 214 wcp = convbuf; 215 p = mbsarg; 216 bzero(&mbs, sizeof(mbs)); 217 nconv = 0; 218 while (insize != 0) { 219 nconv = mbrtowc(wcp, p, insize, &mbs); 220 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2) 221 break; 222 wcp++; 223 p += nconv; 224 insize -= nconv; 225 } 226 if (nconv == (size_t)-1 || nconv == (size_t)-2) { 227 free(convbuf); 228 return (NULL); 229 } 230 *wcp = '\0'; 231 232 return (convbuf); 233 } 234 235 #ifdef FLOATING_POINT 236 #include <float.h> 237 #include <locale.h> 238 #include <math.h> 239 #include "floatio.h" 240 #include "gdtoa.h" 241 242 #define DEFPREC 6 243 244 static int exponent(wchar_t *, int, int); 245 #endif /* FLOATING_POINT */ 246 247 /* 248 * The size of the buffer we use as scratch space for integer 249 * conversions, among other things. Technically, we would need the 250 * most space for base 10 conversions with thousands' grouping 251 * characters between each pair of digits. 100 bytes is a 252 * conservative overestimate even for a 128-bit uintmax_t. 253 */ 254 #define BUF 100 255 256 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 257 258 259 /* 260 * Macros for converting digits to letters and vice versa 261 */ 262 #define to_digit(c) ((c) - '0') 263 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 264 #define to_char(n) ((wchar_t)((n) + '0')) 265 266 /* 267 * Flags used during conversion. 268 */ 269 #define ALT 0x0001 /* alternate form */ 270 #define LADJUST 0x0004 /* left adjustment */ 271 #define LONGDBL 0x0008 /* long double */ 272 #define LONGINT 0x0010 /* long integer */ 273 #define LLONGINT 0x0020 /* long long integer */ 274 #define SHORTINT 0x0040 /* short integer */ 275 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ 276 #define FPT 0x0100 /* Floating point number */ 277 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ 278 #define SIZEINT 0x0400 /* (signed) size_t */ 279 #define CHARINT 0x0800 /* 8 bit integer */ 280 #define MAXINT 0x1000 /* largest integer size (intmax_t) */ 281 282 int 283 __vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap) 284 { 285 wchar_t *fmt; /* format string */ 286 wchar_t ch; /* character from fmt */ 287 int n, n2, n3; /* handy integers (short term usage) */ 288 wchar_t *cp; /* handy char pointer (short term usage) */ 289 int flags; /* flags as above */ 290 int ret; /* return value accumulator */ 291 int width; /* width from format (%8d), or 0 */ 292 int prec; /* precision from format; <0 for N/A */ 293 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */ 294 #ifdef FLOATING_POINT 295 /* 296 * We can decompose the printed representation of floating 297 * point numbers into several parts, some of which may be empty: 298 * 299 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 300 * A B ---C--- D E F 301 * 302 * A: 'sign' holds this value if present; '\0' otherwise 303 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 304 * C: cp points to the string MMMNNN. Leading and trailing 305 * zeros are not in the string and must be added. 306 * D: expchar holds this character; '\0' if no exponent, e.g. %f 307 * F: at least two digits for decimal, at least one digit for hex 308 */ 309 char *decimal_point = NULL; 310 int signflag; /* true if float is negative */ 311 union { /* floating point arguments %[aAeEfFgG] */ 312 double dbl; 313 long double ldbl; 314 } fparg; 315 int expt; /* integer value of exponent */ 316 char expchar; /* exponent character: [eEpP\0] */ 317 char *dtoaend; /* pointer to end of converted digits */ 318 int expsize; /* character count for expstr */ 319 int lead; /* sig figs before decimal or group sep */ 320 int ndig; /* actual number of digits returned by dtoa */ 321 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 322 char *dtoaresult = NULL; 323 #endif 324 325 uintmax_t _umax; /* integer arguments %[diouxX] */ 326 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 327 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 328 int realsz; /* field size expanded by dprec */ 329 int size; /* size of converted field or string */ 330 const char *xdigs; /* digits for %[xX] conversion */ 331 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */ 332 wchar_t ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 333 union arg *argtable; /* args, built due to positional arg */ 334 union arg statargtable[STATIC_ARG_TBL_SIZE]; 335 size_t argtablesiz; 336 int nextarg; /* 1-based argument index */ 337 va_list orgap; /* original argument pointer */ 338 wchar_t *convbuf; /* buffer for multibyte to wide conversion */ 339 340 /* 341 * Choose PADSIZE to trade efficiency vs. size. If larger printf 342 * fields occur frequently, increase PADSIZE and make the initialisers 343 * below longer. 344 */ 345 #define PADSIZE 16 /* pad chunk size */ 346 static wchar_t blanks[PADSIZE] = 347 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 348 static wchar_t zeroes[PADSIZE] = 349 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 350 351 static const char xdigs_lower[16] = "0123456789abcdef"; 352 static const char xdigs_upper[16] = "0123456789ABCDEF"; 353 354 /* 355 * BEWARE, these `goto error' on error, PRINT uses 'n3', 356 * PAD uses `n' and 'n3', and PRINTANDPAD uses 'n', 'n2', and 'n3'. 357 */ 358 #define PRINT(ptr, len) do { \ 359 for (n3 = 0; n3 < (len); n3++) { \ 360 if ((__xfputwc((ptr)[n3], fp)) == WEOF) \ 361 goto error; \ 362 } \ 363 } while (0) 364 #define PAD(howmany, with) do { \ 365 if ((n = (howmany)) > 0) { \ 366 while (n > PADSIZE) { \ 367 PRINT(with, PADSIZE); \ 368 n -= PADSIZE; \ 369 } \ 370 PRINT(with, n); \ 371 } \ 372 } while (0) 373 #define PRINTANDPAD(p, ep, len, with) do { \ 374 n2 = (ep) - (p); \ 375 if (n2 > (len)) \ 376 n2 = (len); \ 377 if (n2 > 0) \ 378 PRINT((p), n2); \ 379 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 380 } while(0) 381 382 /* 383 * To extend shorts properly, we need both signed and unsigned 384 * argument extraction methods. 385 */ 386 #define SARG() \ 387 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 388 flags&LLONGINT ? GETARG(long long) : \ 389 flags&LONGINT ? GETARG(long) : \ 390 flags&PTRINT ? GETARG(ptrdiff_t) : \ 391 flags&SIZEINT ? GETARG(ssize_t) : \ 392 flags&SHORTINT ? (short)GETARG(int) : \ 393 flags&CHARINT ? (signed char)GETARG(int) : \ 394 GETARG(int))) 395 #define UARG() \ 396 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 397 flags&LLONGINT ? GETARG(unsigned long long) : \ 398 flags&LONGINT ? GETARG(unsigned long) : \ 399 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 400 flags&SIZEINT ? GETARG(size_t) : \ 401 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 402 flags&CHARINT ? (unsigned char)GETARG(int) : \ 403 GETARG(unsigned int))) 404 405 /* 406 * Append a digit to a value and check for overflow. 407 */ 408 #define APPEND_DIGIT(val, dig) do { \ 409 if ((val) > INT_MAX / 10) \ 410 goto overflow; \ 411 (val) *= 10; \ 412 if ((val) > INT_MAX - to_digit((dig))) \ 413 goto overflow; \ 414 (val) += to_digit((dig)); \ 415 } while (0) 416 417 /* 418 * Get * arguments, including the form *nn$. Preserve the nextarg 419 * that the argument can be gotten once the type is determined. 420 */ 421 #define GETASTER(val) \ 422 n2 = 0; \ 423 cp = fmt; \ 424 while (is_digit(*cp)) { \ 425 APPEND_DIGIT(n2, *cp); \ 426 cp++; \ 427 } \ 428 if (*cp == '$') { \ 429 int hold = nextarg; \ 430 if (argtable == NULL) { \ 431 argtable = statargtable; \ 432 if (__find_arguments(fmt0, orgap, &argtable, \ 433 &argtablesiz) == -1) { \ 434 ret = -1; \ 435 goto error; \ 436 } \ 437 } \ 438 nextarg = n2; \ 439 val = GETARG(int); \ 440 nextarg = hold; \ 441 fmt = ++cp; \ 442 } else { \ 443 val = GETARG(int); \ 444 } 445 446 /* 447 * Get the argument indexed by nextarg. If the argument table is 448 * built, use it to get the argument. If its not, get the next 449 * argument (and arguments must be gotten sequentially). 450 */ 451 #define GETARG(type) \ 452 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 453 (nextarg++, va_arg(ap, type))) 454 455 _SET_ORIENTATION(fp, 1); 456 /* sorry, fwprintf(read_only_file, "") returns EOF, not 0 */ 457 if (cantwrite(fp)) { 458 errno = EBADF; 459 return (EOF); 460 } 461 462 /* optimise fwprintf(stderr) (and other unbuffered Unix files) */ 463 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 464 fp->_file >= 0) 465 return (__sbprintf(fp, fmt0, ap)); 466 467 fmt = (wchar_t *)fmt0; 468 argtable = NULL; 469 nextarg = 1; 470 va_copy(orgap, ap); 471 ret = 0; 472 convbuf = NULL; 473 474 /* 475 * Scan the format for conversions (`%' character). 476 */ 477 for (;;) { 478 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 479 continue; 480 if (fmt != cp) { 481 ptrdiff_t m = fmt - cp; 482 if (m < 0 || m > INT_MAX - ret) 483 goto overflow; 484 PRINT(cp, m); 485 ret += m; 486 } 487 if (ch == '\0') 488 goto done; 489 fmt++; /* skip over '%' */ 490 491 flags = 0; 492 dprec = 0; 493 width = 0; 494 prec = -1; 495 sign = '\0'; 496 ox[1] = '\0'; 497 498 rflag: ch = *fmt++; 499 reswitch: switch (ch) { 500 case ' ': 501 /* 502 * ``If the space and + flags both appear, the space 503 * flag will be ignored.'' 504 * -- ANSI X3J11 505 */ 506 if (!sign) 507 sign = ' '; 508 goto rflag; 509 case '#': 510 flags |= ALT; 511 goto rflag; 512 case '\'': 513 /* grouping not implemented */ 514 goto rflag; 515 case '*': 516 /* 517 * ``A negative field width argument is taken as a 518 * - flag followed by a positive field width.'' 519 * -- ANSI X3J11 520 * They don't exclude field widths read from args. 521 */ 522 GETASTER(width); 523 if (width >= 0) 524 goto rflag; 525 if (width == INT_MIN) 526 goto overflow; 527 width = -width; 528 /* FALLTHROUGH */ 529 case '-': 530 flags |= LADJUST; 531 goto rflag; 532 case '+': 533 sign = '+'; 534 goto rflag; 535 case '.': 536 if ((ch = *fmt++) == '*') { 537 GETASTER(n); 538 prec = n < 0 ? -1 : n; 539 goto rflag; 540 } 541 n = 0; 542 while (is_digit(ch)) { 543 APPEND_DIGIT(n, ch); 544 ch = *fmt++; 545 } 546 if (ch == '$') { 547 nextarg = n; 548 if (argtable == NULL) { 549 argtable = statargtable; 550 if (__find_arguments(fmt0, orgap, 551 &argtable, &argtablesiz) == -1) { 552 ret = -1; 553 goto error; 554 } 555 } 556 goto rflag; 557 } 558 prec = n; 559 goto reswitch; 560 case '0': 561 /* 562 * ``Note that 0 is taken as a flag, not as the 563 * beginning of a field width.'' 564 * -- ANSI X3J11 565 */ 566 flags |= ZEROPAD; 567 goto rflag; 568 case '1': case '2': case '3': case '4': 569 case '5': case '6': case '7': case '8': case '9': 570 n = 0; 571 do { 572 APPEND_DIGIT(n, ch); 573 ch = *fmt++; 574 } while (is_digit(ch)); 575 if (ch == '$') { 576 nextarg = n; 577 if (argtable == NULL) { 578 argtable = statargtable; 579 if (__find_arguments(fmt0, orgap, 580 &argtable, &argtablesiz) == -1) { 581 ret = -1; 582 goto error; 583 } 584 } 585 goto rflag; 586 } 587 width = n; 588 goto reswitch; 589 #ifdef FLOATING_POINT 590 case 'L': 591 flags |= LONGDBL; 592 goto rflag; 593 #endif 594 case 'h': 595 if (*fmt == 'h') { 596 fmt++; 597 flags |= CHARINT; 598 } else { 599 flags |= SHORTINT; 600 } 601 goto rflag; 602 case 'j': 603 flags |= MAXINT; 604 goto rflag; 605 case 'l': 606 if (*fmt == 'l') { 607 fmt++; 608 flags |= LLONGINT; 609 } else { 610 flags |= LONGINT; 611 } 612 goto rflag; 613 case 'q': 614 flags |= LLONGINT; 615 goto rflag; 616 case 't': 617 flags |= PTRINT; 618 goto rflag; 619 case 'z': 620 flags |= SIZEINT; 621 goto rflag; 622 case 'C': 623 flags |= LONGINT; 624 /*FALLTHROUGH*/ 625 case 'c': 626 if (flags & LONGINT) 627 *(cp = buf) = (wchar_t)GETARG(wint_t); 628 else 629 *(cp = buf) = (wchar_t)btowc(GETARG(int)); 630 size = 1; 631 sign = '\0'; 632 break; 633 case 'D': 634 flags |= LONGINT; 635 /*FALLTHROUGH*/ 636 case 'd': 637 case 'i': 638 _umax = SARG(); 639 if ((intmax_t)_umax < 0) { 640 _umax = -_umax; 641 sign = '-'; 642 } 643 base = DEC; 644 goto number; 645 #ifdef FLOATING_POINT 646 case 'a': 647 case 'A': 648 if (ch == 'a') { 649 ox[1] = 'x'; 650 xdigs = xdigs_lower; 651 expchar = 'p'; 652 } else { 653 ox[1] = 'X'; 654 xdigs = xdigs_upper; 655 expchar = 'P'; 656 } 657 if (prec >= 0) 658 prec++; 659 if (dtoaresult) 660 __freedtoa(dtoaresult); 661 if (flags & LONGDBL) { 662 fparg.ldbl = GETARG(long double); 663 dtoaresult = 664 __hldtoa(fparg.ldbl, xdigs, prec, 665 &expt, &signflag, &dtoaend); 666 if (dtoaresult == NULL) { 667 errno = ENOMEM; 668 goto error; 669 } 670 } else { 671 fparg.dbl = GETARG(double); 672 dtoaresult = 673 __hdtoa(fparg.dbl, xdigs, prec, 674 &expt, &signflag, &dtoaend); 675 if (dtoaresult == NULL) { 676 errno = ENOMEM; 677 goto error; 678 } 679 } 680 if (prec < 0) 681 prec = dtoaend - dtoaresult; 682 if (expt == INT_MAX) 683 ox[1] = '\0'; 684 free(convbuf); 685 cp = convbuf = __mbsconv(dtoaresult, -1); 686 if (cp == NULL) 687 goto error; 688 ndig = dtoaend - dtoaresult; 689 goto fp_common; 690 case 'e': 691 case 'E': 692 expchar = ch; 693 if (prec < 0) /* account for digit before decpt */ 694 prec = DEFPREC + 1; 695 else 696 prec++; 697 goto fp_begin; 698 case 'f': 699 case 'F': 700 expchar = '\0'; 701 goto fp_begin; 702 case 'g': 703 case 'G': 704 expchar = ch - ('g' - 'e'); 705 if (prec == 0) 706 prec = 1; 707 fp_begin: 708 if (prec < 0) 709 prec = DEFPREC; 710 if (dtoaresult) 711 __freedtoa(dtoaresult); 712 if (flags & LONGDBL) { 713 fparg.ldbl = GETARG(long double); 714 dtoaresult = 715 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 716 &expt, &signflag, &dtoaend); 717 if (dtoaresult == NULL) { 718 errno = ENOMEM; 719 goto error; 720 } 721 } else { 722 fparg.dbl = GETARG(double); 723 dtoaresult = 724 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 725 &expt, &signflag, &dtoaend); 726 if (dtoaresult == NULL) { 727 errno = ENOMEM; 728 goto error; 729 } 730 if (expt == 9999) 731 expt = INT_MAX; 732 } 733 free(convbuf); 734 cp = convbuf = __mbsconv(dtoaresult, -1); 735 if (cp == NULL) 736 goto error; 737 ndig = dtoaend - dtoaresult; 738 fp_common: 739 if (signflag) 740 sign = '-'; 741 if (expt == INT_MAX) { /* inf or nan */ 742 if (*cp == 'N') 743 cp = (ch >= 'a') ? L"nan" : L"NAN"; 744 else 745 cp = (ch >= 'a') ? L"inf" : L"INF"; 746 size = 3; 747 flags &= ~ZEROPAD; 748 break; 749 } 750 flags |= FPT; 751 if (ch == 'g' || ch == 'G') { 752 if (expt > -4 && expt <= prec) { 753 /* Make %[gG] smell like %[fF] */ 754 expchar = '\0'; 755 if (flags & ALT) 756 prec -= expt; 757 else 758 prec = ndig - expt; 759 if (prec < 0) 760 prec = 0; 761 } else { 762 /* 763 * Make %[gG] smell like %[eE], but 764 * trim trailing zeroes if no # flag. 765 */ 766 if (!(flags & ALT)) 767 prec = ndig; 768 } 769 } 770 if (expchar) { 771 expsize = exponent(expstr, expt - 1, expchar); 772 size = expsize + prec; 773 if (prec > 1 || flags & ALT) 774 ++size; 775 } else { 776 /* space for digits before decimal point */ 777 if (expt > 0) 778 size = expt; 779 else /* "0" */ 780 size = 1; 781 /* space for decimal pt and following digits */ 782 if (prec || flags & ALT) 783 size += prec + 1; 784 lead = expt; 785 } 786 break; 787 #endif /* FLOATING_POINT */ 788 #ifndef NO_PRINTF_PERCENT_N 789 case 'n': { 790 int maxprot = 0; 791 792 #ifdef notyet 793 if (mprotections(fmt0, wcslen(fmt0) + 1, 794 &maxprot) == -1) 795 maxprot = 0; 796 maxprot &= ~PROT_READ; 797 #endif 798 799 if (n_report == 0 || maxprot) { 800 char buf[1024], *p; 801 802 /* <10> is LOG_CRIT */ 803 strlcpy(buf, "<10>", sizeof buf); 804 805 /* XXX */ 806 if ((p = getenv("_THIS_PORT")) != NULL) { 807 strlcat(buf, p, sizeof buf); 808 strlcat(buf, " ", sizeof buf); 809 } 810 811 /* Make sure progname does not fill the whole buffer */ 812 strlcat(buf, __progname, sizeof(buf) - sizeof n_msg); 813 strlcat(buf, n_msg, sizeof buf); 814 /* XXX should we include the wide string? */ 815 if ((p = strchr(buf, '\n'))) 816 *p = '\0'; 817 if (maxprot) 818 strlcat(buf, ": aborting", sizeof buf); 819 sendsyslog(buf, strlen(buf), LOG_CONS); 820 n_report = 1; 821 } 822 if (maxprot) 823 abort(); 824 825 if (flags & LLONGINT) 826 *GETARG(long long *) = ret; 827 else if (flags & LONGINT) 828 *GETARG(long *) = ret; 829 else if (flags & SHORTINT) 830 *GETARG(short *) = ret; 831 else if (flags & CHARINT) 832 *GETARG(signed char *) = ret; 833 else if (flags & PTRINT) 834 *GETARG(ptrdiff_t *) = ret; 835 else if (flags & SIZEINT) 836 *GETARG(ssize_t *) = ret; 837 else if (flags & MAXINT) 838 *GETARG(intmax_t *) = ret; 839 else 840 *GETARG(int *) = ret; 841 continue; /* no output */ 842 } 843 #endif /* NO_PRINTF_PERCENT_N */ 844 case 'O': 845 flags |= LONGINT; 846 /*FALLTHROUGH*/ 847 case 'o': 848 _umax = UARG(); 849 base = OCT; 850 goto nosign; 851 case 'p': 852 /* 853 * ``The argument shall be a pointer to void. The 854 * value of the pointer is converted to a sequence 855 * of printable characters, in an implementation- 856 * defined manner.'' 857 * -- ANSI X3J11 858 */ 859 _umax = (u_long)GETARG(void *); 860 base = HEX; 861 xdigs = xdigs_lower; 862 ox[1] = 'x'; 863 goto nosign; 864 case 'S': 865 flags |= LONGINT; 866 /*FALLTHROUGH*/ 867 case 's': 868 if (flags & LONGINT) { 869 if ((cp = GETARG(wchar_t *)) == NULL) { 870 struct syslog_data sdata = SYSLOG_DATA_INIT; 871 int save_errno = errno; 872 873 syslog_r(LOG_CRIT | LOG_CONS, &sdata, 874 "vfwprintf %%ls NULL in \"%ls\"", fmt0); 875 errno = save_errno; 876 877 cp = L"(null)"; 878 } 879 } else { 880 char *mbsarg; 881 if ((mbsarg = 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 "vfwprintf %%s NULL in \"%ls\"", fmt0); 887 errno = save_errno; 888 889 mbsarg = "(null)"; 890 } 891 free(convbuf); 892 convbuf = __mbsconv(mbsarg, prec); 893 if (convbuf == NULL) { 894 fp->_flags |= __SERR; 895 goto error; 896 } else 897 cp = convbuf; 898 } 899 if (prec >= 0) { 900 /* 901 * can't use wcslen; can only look for the 902 * NUL in the first `prec' characters, and 903 * wcslen() will go further. 904 */ 905 wchar_t *p = wmemchr(cp, 0, prec); 906 907 size = p ? (p - cp) : prec; 908 } else { 909 size_t len; 910 911 if ((len = wcslen(cp)) > INT_MAX) 912 goto overflow; 913 size = (int)len; 914 } 915 sign = '\0'; 916 break; 917 case 'U': 918 flags |= LONGINT; 919 /*FALLTHROUGH*/ 920 case 'u': 921 _umax = UARG(); 922 base = DEC; 923 goto nosign; 924 case 'X': 925 xdigs = xdigs_upper; 926 goto hex; 927 case 'x': 928 xdigs = xdigs_lower; 929 hex: _umax = UARG(); 930 base = HEX; 931 /* leading 0x/X only if non-zero */ 932 if (flags & ALT && _umax != 0) 933 ox[1] = ch; 934 935 /* unsigned conversions */ 936 nosign: sign = '\0'; 937 /* 938 * ``... diouXx conversions ... if a precision is 939 * specified, the 0 flag will be ignored.'' 940 * -- ANSI X3J11 941 */ 942 number: if ((dprec = prec) >= 0) 943 flags &= ~ZEROPAD; 944 945 /* 946 * ``The result of converting a zero value with an 947 * explicit precision of zero is no characters.'' 948 * -- ANSI X3J11 949 */ 950 cp = buf + BUF; 951 if (_umax != 0 || prec != 0) { 952 /* 953 * Unsigned mod is hard, and unsigned mod 954 * by a constant is easier than that by 955 * a variable; hence this switch. 956 */ 957 switch (base) { 958 case OCT: 959 do { 960 *--cp = to_char(_umax & 7); 961 _umax >>= 3; 962 } while (_umax); 963 /* handle octal leading 0 */ 964 if (flags & ALT && *cp != '0') 965 *--cp = '0'; 966 break; 967 968 case DEC: 969 /* many numbers are 1 digit */ 970 while (_umax >= 10) { 971 *--cp = to_char(_umax % 10); 972 _umax /= 10; 973 } 974 *--cp = to_char(_umax); 975 break; 976 977 case HEX: 978 do { 979 *--cp = xdigs[_umax & 15]; 980 _umax >>= 4; 981 } while (_umax); 982 break; 983 984 default: 985 cp = L"bug in vfwprintf: bad base"; 986 size = wcslen(cp); 987 goto skipsize; 988 } 989 } 990 size = buf + BUF - cp; 991 if (size > BUF) /* should never happen */ 992 abort(); 993 skipsize: 994 break; 995 default: /* "%?" prints ?, unless ? is NUL */ 996 if (ch == '\0') 997 goto done; 998 /* pretend it was %c with argument ch */ 999 cp = buf; 1000 *cp = ch; 1001 size = 1; 1002 sign = '\0'; 1003 break; 1004 } 1005 1006 /* 1007 * All reasonable formats wind up here. At this point, `cp' 1008 * points to a string which (if not flags&LADJUST) should be 1009 * padded out to `width' places. If flags&ZEROPAD, it should 1010 * first be prefixed by any sign or other prefix; otherwise, 1011 * it should be blank padded before the prefix is emitted. 1012 * After any left-hand padding and prefixing, emit zeroes 1013 * required by a decimal %[diouxX] precision, then print the 1014 * string proper, then emit zeroes required by any leftover 1015 * floating precision; finally, if LADJUST, pad with blanks. 1016 * 1017 * Compute actual size, so we know how much to pad. 1018 * size excludes decimal prec; realsz includes it. 1019 */ 1020 realsz = dprec > size ? dprec : size; 1021 if (sign) 1022 realsz++; 1023 if (ox[1]) 1024 realsz+= 2; 1025 1026 /* right-adjusting blank padding */ 1027 if ((flags & (LADJUST|ZEROPAD)) == 0) 1028 PAD(width - realsz, blanks); 1029 1030 /* prefix */ 1031 if (sign) 1032 PRINT(&sign, 1); 1033 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1034 ox[0] = '0'; 1035 PRINT(ox, 2); 1036 } 1037 1038 /* right-adjusting zero padding */ 1039 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1040 PAD(width - realsz, zeroes); 1041 1042 /* leading zeroes from decimal precision */ 1043 PAD(dprec - size, zeroes); 1044 1045 /* the string or number proper */ 1046 #ifdef FLOATING_POINT 1047 if ((flags & FPT) == 0) { 1048 PRINT(cp, size); 1049 } else { /* glue together f_p fragments */ 1050 if (decimal_point == NULL) 1051 decimal_point = nl_langinfo(RADIXCHAR); 1052 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1053 if (expt <= 0) { 1054 PRINT(zeroes, 1); 1055 if (prec || flags & ALT) 1056 PRINT(decimal_point, 1); 1057 PAD(-expt, zeroes); 1058 /* already handled initial 0's */ 1059 prec += expt; 1060 } else { 1061 PRINTANDPAD(cp, convbuf + ndig, 1062 lead, zeroes); 1063 cp += lead; 1064 if (prec || flags & ALT) 1065 PRINT(decimal_point, 1); 1066 } 1067 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes); 1068 } else { /* %[eE] or sufficiently long %[gG] */ 1069 if (prec > 1 || flags & ALT) { 1070 buf[0] = *cp++; 1071 buf[1] = *decimal_point; 1072 PRINT(buf, 2); 1073 PRINT(cp, ndig-1); 1074 PAD(prec - ndig, zeroes); 1075 } else { /* XeYYY */ 1076 PRINT(cp, 1); 1077 } 1078 PRINT(expstr, expsize); 1079 } 1080 } 1081 #else 1082 PRINT(cp, size); 1083 #endif 1084 /* left-adjusting padding (always blank) */ 1085 if (flags & LADJUST) 1086 PAD(width - realsz, blanks); 1087 1088 /* finally, adjust ret */ 1089 if (width < realsz) 1090 width = realsz; 1091 if (width > INT_MAX - ret) 1092 goto overflow; 1093 ret += width; 1094 } 1095 done: 1096 error: 1097 va_end(orgap); 1098 if (__sferror(fp)) 1099 ret = -1; 1100 goto finish; 1101 1102 overflow: 1103 errno = ENOMEM; 1104 ret = -1; 1105 1106 finish: 1107 free(convbuf); 1108 #ifdef FLOATING_POINT 1109 if (dtoaresult) 1110 __freedtoa(dtoaresult); 1111 #endif 1112 if (argtable != NULL && argtable != statargtable) { 1113 munmap(argtable, argtablesiz); 1114 argtable = NULL; 1115 } 1116 return (ret); 1117 } 1118 1119 int 1120 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap) 1121 { 1122 int r; 1123 1124 FLOCKFILE(fp); 1125 r = __vfwprintf(fp, fmt0, ap); 1126 FUNLOCKFILE(fp); 1127 1128 return (r); 1129 } 1130 DEF_STRONG(vfwprintf); 1131 1132 /* 1133 * Type ids for argument type table. 1134 */ 1135 #define T_UNUSED 0 1136 #define T_SHORT 1 1137 #define T_U_SHORT 2 1138 #define TP_SHORT 3 1139 #define T_INT 4 1140 #define T_U_INT 5 1141 #define TP_INT 6 1142 #define T_LONG 7 1143 #define T_U_LONG 8 1144 #define TP_LONG 9 1145 #define T_LLONG 10 1146 #define T_U_LLONG 11 1147 #define TP_LLONG 12 1148 #define T_DOUBLE 13 1149 #define T_LONG_DOUBLE 14 1150 #define TP_CHAR 15 1151 #define TP_VOID 16 1152 #define T_PTRINT 17 1153 #define TP_PTRINT 18 1154 #define T_SIZEINT 19 1155 #define T_SSIZEINT 20 1156 #define TP_SSIZEINT 21 1157 #define T_MAXINT 22 1158 #define T_MAXUINT 23 1159 #define TP_MAXINT 24 1160 #define T_CHAR 25 1161 #define T_U_CHAR 26 1162 #define T_WINT 27 1163 #define TP_WCHAR 28 1164 1165 /* 1166 * Find all arguments when a positional parameter is encountered. Returns a 1167 * table, indexed by argument number, of pointers to each arguments. The 1168 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1169 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1170 * used since we are attempting to make snprintf thread safe, and alloca is 1171 * problematic since we have nested functions..) 1172 */ 1173 static int 1174 __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable, 1175 size_t *argtablesiz) 1176 { 1177 wchar_t *fmt; /* format string */ 1178 int ch; /* character from fmt */ 1179 int n, n2; /* handy integer (short term usage) */ 1180 wchar_t *cp; /* handy char pointer (short term usage) */ 1181 int flags; /* flags as above */ 1182 unsigned char *typetable; /* table of types */ 1183 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1184 int tablesize; /* current size of type table */ 1185 int tablemax; /* largest used index in table */ 1186 int nextarg; /* 1-based argument index */ 1187 int ret = 0; /* return value */ 1188 1189 /* 1190 * Add an argument type to the table, expanding if necessary. 1191 */ 1192 #define ADDTYPE(type) \ 1193 ((nextarg >= tablesize) ? \ 1194 __grow_type_table(&typetable, &tablesize) : 0, \ 1195 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1196 typetable[nextarg++] = type) 1197 1198 #define ADDSARG() \ 1199 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1200 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1201 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1202 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1203 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1204 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1205 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1206 1207 #define ADDUARG() \ 1208 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1209 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1210 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1211 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1212 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1213 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1214 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1215 1216 /* 1217 * Add * arguments to the type array. 1218 */ 1219 #define ADDASTER() \ 1220 n2 = 0; \ 1221 cp = fmt; \ 1222 while (is_digit(*cp)) { \ 1223 APPEND_DIGIT(n2, *cp); \ 1224 cp++; \ 1225 } \ 1226 if (*cp == '$') { \ 1227 int hold = nextarg; \ 1228 nextarg = n2; \ 1229 ADDTYPE(T_INT); \ 1230 nextarg = hold; \ 1231 fmt = ++cp; \ 1232 } else { \ 1233 ADDTYPE(T_INT); \ 1234 } 1235 fmt = (wchar_t *)fmt0; 1236 typetable = stattypetable; 1237 tablesize = STATIC_ARG_TBL_SIZE; 1238 tablemax = 0; 1239 nextarg = 1; 1240 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1241 1242 /* 1243 * Scan the format for conversions (`%' character). 1244 */ 1245 for (;;) { 1246 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1247 continue; 1248 if (ch == '\0') 1249 goto done; 1250 fmt++; /* skip over '%' */ 1251 1252 flags = 0; 1253 1254 rflag: ch = *fmt++; 1255 reswitch: switch (ch) { 1256 case ' ': 1257 case '#': 1258 case '\'': 1259 goto rflag; 1260 case '*': 1261 ADDASTER(); 1262 goto rflag; 1263 case '-': 1264 case '+': 1265 goto rflag; 1266 case '.': 1267 if ((ch = *fmt++) == '*') { 1268 ADDASTER(); 1269 goto rflag; 1270 } 1271 while (is_digit(ch)) { 1272 ch = *fmt++; 1273 } 1274 goto reswitch; 1275 case '0': 1276 goto rflag; 1277 case '1': case '2': case '3': case '4': 1278 case '5': case '6': case '7': case '8': case '9': 1279 n = 0; 1280 do { 1281 APPEND_DIGIT(n ,ch); 1282 ch = *fmt++; 1283 } while (is_digit(ch)); 1284 if (ch == '$') { 1285 nextarg = n; 1286 goto rflag; 1287 } 1288 goto reswitch; 1289 #ifdef FLOATING_POINT 1290 case 'L': 1291 flags |= LONGDBL; 1292 goto rflag; 1293 #endif 1294 case 'h': 1295 if (*fmt == 'h') { 1296 fmt++; 1297 flags |= CHARINT; 1298 } else { 1299 flags |= SHORTINT; 1300 } 1301 goto rflag; 1302 case 'l': 1303 if (*fmt == 'l') { 1304 fmt++; 1305 flags |= LLONGINT; 1306 } else { 1307 flags |= LONGINT; 1308 } 1309 goto rflag; 1310 case 'q': 1311 flags |= LLONGINT; 1312 goto rflag; 1313 case 't': 1314 flags |= PTRINT; 1315 goto rflag; 1316 case 'z': 1317 flags |= SIZEINT; 1318 goto rflag; 1319 case 'C': 1320 flags |= LONGINT; 1321 /*FALLTHROUGH*/ 1322 case 'c': 1323 if (flags & LONGINT) 1324 ADDTYPE(T_WINT); 1325 else 1326 ADDTYPE(T_INT); 1327 break; 1328 case 'D': 1329 flags |= LONGINT; 1330 /*FALLTHROUGH*/ 1331 case 'd': 1332 case 'i': 1333 ADDSARG(); 1334 break; 1335 #ifdef FLOATING_POINT 1336 case 'a': 1337 case 'A': 1338 case 'e': 1339 case 'E': 1340 case 'f': 1341 case 'F': 1342 case 'g': 1343 case 'G': 1344 if (flags & LONGDBL) 1345 ADDTYPE(T_LONG_DOUBLE); 1346 else 1347 ADDTYPE(T_DOUBLE); 1348 break; 1349 #endif /* FLOATING_POINT */ 1350 #ifndef NO_PRINTF_PERCENT_N 1351 case 'n': 1352 if (flags & LLONGINT) 1353 ADDTYPE(TP_LLONG); 1354 else if (flags & LONGINT) 1355 ADDTYPE(TP_LONG); 1356 else if (flags & SHORTINT) 1357 ADDTYPE(TP_SHORT); 1358 else if (flags & PTRINT) 1359 ADDTYPE(TP_PTRINT); 1360 else if (flags & SIZEINT) 1361 ADDTYPE(TP_SSIZEINT); 1362 else if (flags & MAXINT) 1363 ADDTYPE(TP_MAXINT); 1364 else 1365 ADDTYPE(TP_INT); 1366 continue; /* no output */ 1367 #endif /* NO_PRINTF_PERCENT_N */ 1368 case 'O': 1369 flags |= LONGINT; 1370 /*FALLTHROUGH*/ 1371 case 'o': 1372 ADDUARG(); 1373 break; 1374 case 'p': 1375 ADDTYPE(TP_VOID); 1376 break; 1377 case 'S': 1378 flags |= LONGINT; 1379 /*FALLTHROUGH*/ 1380 case 's': 1381 if (flags & LONGINT) 1382 ADDTYPE(TP_CHAR); 1383 else 1384 ADDTYPE(TP_WCHAR); 1385 break; 1386 case 'U': 1387 flags |= LONGINT; 1388 /*FALLTHROUGH*/ 1389 case 'u': 1390 case 'X': 1391 case 'x': 1392 ADDUARG(); 1393 break; 1394 default: /* "%?" prints ?, unless ? is NUL */ 1395 if (ch == '\0') 1396 goto done; 1397 break; 1398 } 1399 } 1400 done: 1401 /* 1402 * Build the argument table. 1403 */ 1404 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1405 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1406 *argtable = mmap(NULL, *argtablesiz, 1407 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1408 if (*argtable == MAP_FAILED) 1409 return (-1); 1410 } 1411 1412 #if 0 1413 /* XXX is this required? */ 1414 (*argtable)[0].intarg = 0; 1415 #endif 1416 for (n = 1; n <= tablemax; n++) { 1417 switch (typetable[n]) { 1418 case T_UNUSED: 1419 case T_CHAR: 1420 case T_U_CHAR: 1421 case T_SHORT: 1422 case T_U_SHORT: 1423 case T_INT: 1424 (*argtable)[n].intarg = va_arg(ap, int); 1425 break; 1426 case TP_SHORT: 1427 (*argtable)[n].pshortarg = va_arg(ap, short *); 1428 break; 1429 case T_U_INT: 1430 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1431 break; 1432 case TP_INT: 1433 (*argtable)[n].pintarg = va_arg(ap, int *); 1434 break; 1435 case T_LONG: 1436 (*argtable)[n].longarg = va_arg(ap, long); 1437 break; 1438 case T_U_LONG: 1439 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1440 break; 1441 case TP_LONG: 1442 (*argtable)[n].plongarg = va_arg(ap, long *); 1443 break; 1444 case T_LLONG: 1445 (*argtable)[n].longlongarg = va_arg(ap, long long); 1446 break; 1447 case T_U_LLONG: 1448 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1449 break; 1450 case TP_LLONG: 1451 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1452 break; 1453 #ifdef FLOATING_POINT 1454 case T_DOUBLE: 1455 (*argtable)[n].doublearg = va_arg(ap, double); 1456 break; 1457 case T_LONG_DOUBLE: 1458 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1459 break; 1460 #endif 1461 case TP_CHAR: 1462 (*argtable)[n].pchararg = va_arg(ap, char *); 1463 break; 1464 case TP_VOID: 1465 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1466 break; 1467 case T_PTRINT: 1468 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1469 break; 1470 case TP_PTRINT: 1471 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1472 break; 1473 case T_SIZEINT: 1474 (*argtable)[n].sizearg = va_arg(ap, size_t); 1475 break; 1476 case T_SSIZEINT: 1477 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1478 break; 1479 case TP_SSIZEINT: 1480 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1481 break; 1482 case TP_MAXINT: 1483 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1484 break; 1485 case T_WINT: 1486 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1487 break; 1488 case TP_WCHAR: 1489 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1490 break; 1491 } 1492 } 1493 goto finish; 1494 1495 overflow: 1496 errno = ENOMEM; 1497 ret = -1; 1498 1499 finish: 1500 if (typetable != NULL && typetable != stattypetable) { 1501 munmap(typetable, *argtablesiz); 1502 typetable = NULL; 1503 } 1504 return (ret); 1505 } 1506 1507 /* 1508 * Increase the size of the type table. 1509 */ 1510 static int 1511 __grow_type_table(unsigned char **typetable, int *tablesize) 1512 { 1513 unsigned char *oldtable = *typetable; 1514 int newsize = *tablesize * 2; 1515 1516 if (newsize < getpagesize()) 1517 newsize = getpagesize(); 1518 1519 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1520 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1521 MAP_ANON|MAP_PRIVATE, -1, 0); 1522 if (*typetable == MAP_FAILED) 1523 return (-1); 1524 bcopy(oldtable, *typetable, *tablesize); 1525 } else { 1526 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1527 MAP_ANON|MAP_PRIVATE, -1, 0); 1528 if (new == MAP_FAILED) 1529 return (-1); 1530 memmove(new, *typetable, *tablesize); 1531 munmap(*typetable, *tablesize); 1532 *typetable = new; 1533 } 1534 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1535 1536 *tablesize = newsize; 1537 return (0); 1538 } 1539 1540 1541 #ifdef FLOATING_POINT 1542 static int 1543 exponent(wchar_t *p0, int exp, int fmtch) 1544 { 1545 wchar_t *p, *t; 1546 wchar_t expbuf[MAXEXPDIG]; 1547 1548 p = p0; 1549 *p++ = fmtch; 1550 if (exp < 0) { 1551 exp = -exp; 1552 *p++ = '-'; 1553 } else 1554 *p++ = '+'; 1555 t = expbuf + MAXEXPDIG; 1556 if (exp > 9) { 1557 do { 1558 *--t = to_char(exp % 10); 1559 } while ((exp /= 10) > 9); 1560 *--t = to_char(exp); 1561 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1562 /* nothing */; 1563 } else { 1564 /* 1565 * Exponents for decimal floating point conversions 1566 * (%[eEgG]) must be at least two characters long, 1567 * whereas exponents for hexadecimal conversions can 1568 * be only one character long. 1569 */ 1570 if (fmtch == 'e' || fmtch == 'E') 1571 *p++ = '0'; 1572 *p++ = to_char(exp); 1573 } 1574 return (p - p0); 1575 } 1576 #endif /* FLOATING_POINT */ 1577