1 /* $OpenBSD: vfwprintf.c,v 1.4 2011/05/09 19:49:51 stsp 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 <limits.h> 45 #include <stdarg.h> 46 #include <stddef.h> 47 #include <stdio.h> 48 #include <stdint.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 #include "local.h" 54 #include "fvwrite.h" 55 56 union arg { 57 int intarg; 58 unsigned int uintarg; 59 long longarg; 60 unsigned long ulongarg; 61 long long longlongarg; 62 unsigned long long ulonglongarg; 63 ptrdiff_t ptrdiffarg; 64 size_t sizearg; 65 ssize_t ssizearg; 66 intmax_t intmaxarg; 67 uintmax_t uintmaxarg; 68 void *pvoidarg; 69 char *pchararg; 70 signed char *pschararg; 71 short *pshortarg; 72 int *pintarg; 73 long *plongarg; 74 long long *plonglongarg; 75 ptrdiff_t *pptrdiffarg; 76 ssize_t *pssizearg; 77 intmax_t *pintmaxarg; 78 #ifdef FLOATING_POINT 79 double doublearg; 80 long double longdoublearg; 81 #endif 82 wint_t wintarg; 83 wchar_t *pwchararg; 84 }; 85 86 static int __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable, 87 size_t *argtablesiz); 88 static int __grow_type_table(unsigned char **typetable, int *tablesize); 89 90 /* 91 * Helper function for `fprintf to unbuffered unix file': creates a 92 * temporary buffer. We only work on write-only files; this avoids 93 * worries about ungetc buffers and so forth. 94 */ 95 static int 96 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap) 97 { 98 int ret; 99 FILE fake; 100 struct __sfileext fakeext; 101 unsigned char buf[BUFSIZ]; 102 103 _FILEEXT_SETUP(&fake, &fakeext); 104 /* copy the important variables */ 105 fake._flags = fp->_flags & ~__SNBF; 106 fake._file = fp->_file; 107 fake._cookie = fp->_cookie; 108 fake._write = fp->_write; 109 110 /* set up the buffer */ 111 fake._bf._base = fake._p = buf; 112 fake._bf._size = fake._w = sizeof(buf); 113 fake._lbfsize = 0; /* not actually used, but Just In Case */ 114 115 /* do the work, then copy any error status */ 116 ret = __vfwprintf(&fake, fmt, ap); 117 if (ret >= 0 && __sflush(&fake)) 118 ret = EOF; 119 if (fake._flags & __SERR) 120 fp->_flags |= __SERR; 121 return (ret); 122 } 123 124 /* 125 * Like __fputwc_unlock, but handles fake string (__SSTR) files properly. 126 * File must already be locked. 127 */ 128 static wint_t 129 __xfputwc(wchar_t wc, FILE *fp) 130 { 131 mbstate_t mbs; 132 char buf[MB_LEN_MAX]; 133 struct __suio uio; 134 struct __siov iov; 135 size_t len; 136 137 if ((fp->_flags & __SSTR) == 0) 138 return (__fputwc_unlock(wc, fp)); 139 140 bzero(&mbs, sizeof(mbs)); 141 len = wcrtomb(buf, wc, &mbs); 142 if (len == (size_t)-1) { 143 fp->_flags |= __SERR; 144 errno = EILSEQ; 145 return (WEOF); 146 } 147 uio.uio_iov = &iov; 148 uio.uio_resid = len; 149 uio.uio_iovcnt = 1; 150 iov.iov_base = buf; 151 iov.iov_len = len; 152 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF); 153 } 154 155 /* 156 * Convert a multibyte character string argument for the %s format to a wide 157 * string representation. ``prec'' specifies the maximum number of bytes 158 * to output. If ``prec'' is greater than or equal to zero, we can't assume 159 * that the multibyte character string ends in a null character. 160 * 161 * Returns NULL on failure. 162 * To find out what happened check errno for ENOMEM, EILSEQ and EINVAL. 163 */ 164 static wchar_t * 165 __mbsconv(char *mbsarg, int prec) 166 { 167 mbstate_t mbs; 168 wchar_t *convbuf, *wcp; 169 const char *p; 170 size_t insize, nchars, nconv; 171 172 if (mbsarg == NULL) 173 return (NULL); 174 175 /* 176 * Supplied argument is a multibyte string; convert it to wide 177 * characters first. 178 */ 179 if (prec >= 0) { 180 /* 181 * String is not guaranteed to be NUL-terminated. Find the 182 * number of characters to print. 183 */ 184 p = mbsarg; 185 insize = nchars = nconv = 0; 186 bzero(&mbs, sizeof(mbs)); 187 while (nchars != (size_t)prec) { 188 nconv = mbrlen(p, MB_CUR_MAX, &mbs); 189 if (nconv == (size_t)0 || nconv == (size_t)-1 || 190 nconv == (size_t)-2) 191 break; 192 p += nconv; 193 nchars++; 194 insize += nconv; 195 } 196 if (nconv == (size_t)-1 || nconv == (size_t)-2) 197 return (NULL); 198 } else 199 insize = strlen(mbsarg); 200 201 /* 202 * Allocate buffer for the result and perform the conversion, 203 * converting at most `size' bytes of the input multibyte string to 204 * wide characters for printing. 205 */ 206 convbuf = calloc(insize + 1, sizeof(*convbuf)); 207 if (convbuf == NULL) 208 return (NULL); 209 wcp = convbuf; 210 p = mbsarg; 211 bzero(&mbs, sizeof(mbs)); 212 nconv = 0; 213 while (insize != 0) { 214 nconv = mbrtowc(wcp, p, insize, &mbs); 215 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2) 216 break; 217 wcp++; 218 p += nconv; 219 insize -= nconv; 220 } 221 if (nconv == (size_t)-1 || nconv == (size_t)-2) { 222 free(convbuf); 223 return (NULL); 224 } 225 *wcp = '\0'; 226 227 return (convbuf); 228 } 229 230 #ifdef FLOATING_POINT 231 #include <float.h> 232 #include <locale.h> 233 #include <math.h> 234 #include "floatio.h" 235 236 #define DEFPREC 6 237 238 extern char *__dtoa(double, int, int, int *, int *, char **); 239 extern void __freedtoa(char *); 240 static int exponent(wchar_t *, int, int); 241 #endif /* FLOATING_POINT */ 242 243 /* 244 * The size of the buffer we use as scratch space for integer 245 * conversions, among other things. Technically, we would need the 246 * most space for base 10 conversions with thousands' grouping 247 * characters between each pair of digits. 100 bytes is a 248 * conservative overestimate even for a 128-bit uintmax_t. 249 */ 250 #define BUF 100 251 252 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 253 254 255 /* 256 * Macros for converting digits to letters and vice versa 257 */ 258 #define to_digit(c) ((c) - '0') 259 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 260 #define to_char(n) ((wchar_t)((n) + '0')) 261 262 /* 263 * Flags used during conversion. 264 */ 265 #define ALT 0x0001 /* alternate form */ 266 #define LADJUST 0x0004 /* left adjustment */ 267 #define LONGDBL 0x0008 /* long double */ 268 #define LONGINT 0x0010 /* long integer */ 269 #define LLONGINT 0x0020 /* long long integer */ 270 #define SHORTINT 0x0040 /* short integer */ 271 #define ZEROPAD 0x0080 /* zero (as opposed to blank) pad */ 272 #define FPT 0x0100 /* Floating point number */ 273 #define PTRINT 0x0200 /* (unsigned) ptrdiff_t */ 274 #define SIZEINT 0x0400 /* (signed) size_t */ 275 #define CHARINT 0x0800 /* 8 bit integer */ 276 #define MAXINT 0x1000 /* largest integer size (intmax_t) */ 277 278 int 279 __vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap) 280 { 281 wchar_t *fmt; /* format string */ 282 wchar_t ch; /* character from fmt */ 283 int n, n2, n3; /* handy integers (short term usage) */ 284 wchar_t *cp; /* handy char pointer (short term usage) */ 285 int flags; /* flags as above */ 286 int ret; /* return value accumulator */ 287 int width; /* width from format (%8d), or 0 */ 288 int prec; /* precision from format; <0 for N/A */ 289 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */ 290 #ifdef FLOATING_POINT 291 /* 292 * We can decompose the printed representation of floating 293 * point numbers into several parts, some of which may be empty: 294 * 295 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 296 * A B ---C--- D E F 297 * 298 * A: 'sign' holds this value if present; '\0' otherwise 299 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 300 * C: cp points to the string MMMNNN. Leading and trailing 301 * zeros are not in the string and must be added. 302 * D: expchar holds this character; '\0' if no exponent, e.g. %f 303 * F: at least two digits for decimal, at least one digit for hex 304 */ 305 char *decimal_point = localeconv()->decimal_point; 306 int signflag; /* true if float is negative */ 307 union { /* floating point arguments %[aAeEfFgG] */ 308 double dbl; 309 long double ldbl; 310 } fparg; 311 int expt; /* integer value of exponent */ 312 char expchar; /* exponent character: [eEpP\0] */ 313 char *dtoaend; /* pointer to end of converted digits */ 314 int expsize; /* character count for expstr */ 315 int lead; /* sig figs before decimal or group sep */ 316 int ndig; /* actual number of digits returned by dtoa */ 317 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 318 char *dtoaresult = NULL; 319 #endif 320 321 uintmax_t _umax; /* integer arguments %[diouxX] */ 322 enum { OCT, DEC, HEX } base; /* base for %[diouxX] conversion */ 323 int dprec; /* a copy of prec if %[diouxX], 0 otherwise */ 324 int realsz; /* field size expanded by dprec */ 325 int size; /* size of converted field or string */ 326 const char *xdigs; /* digits for %[xX] conversion */ 327 #define NIOV 8 328 struct __suio uio; /* output information: summary */ 329 struct __siov iov[NIOV];/* ... and individual io vectors */ 330 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */ 331 wchar_t ox[2]; /* space for 0x; ox[1] is either x, X, or \0 */ 332 union arg *argtable; /* args, built due to positional arg */ 333 union arg statargtable[STATIC_ARG_TBL_SIZE]; 334 size_t argtablesiz; 335 int nextarg; /* 1-based argument index */ 336 va_list orgap; /* original argument pointer */ 337 wchar_t *convbuf; /* buffer for multibyte to wide conversion */ 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 wchar_t blanks[PADSIZE] = 346 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 347 static wchar_t 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, PRINT uses 'n3', 355 * PAD uses `n' and 'n3', and PRINTANDPAD uses 'n', 'n2', and 'n3'. 356 */ 357 #define PRINT(ptr, len) do { \ 358 for (n3 = 0; n3 < (len); n3++) { \ 359 if ((__xfputwc((ptr)[n3], fp)) == WEOF) \ 360 goto error; \ 361 } \ 362 } while (0) 363 #define PAD(howmany, with) do { \ 364 if ((n = (howmany)) > 0) { \ 365 while (n > PADSIZE) { \ 366 PRINT(with, PADSIZE); \ 367 n -= PADSIZE; \ 368 } \ 369 PRINT(with, n); \ 370 } \ 371 } while (0) 372 #define PRINTANDPAD(p, ep, len, with) do { \ 373 n2 = (ep) - (p); \ 374 if (n2 > (len)) \ 375 n2 = (len); \ 376 if (n2 > 0) \ 377 PRINT((p), n2); \ 378 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 379 } while(0) 380 381 /* 382 * To extend shorts properly, we need both signed and unsigned 383 * argument extraction methods. 384 */ 385 #define SARG() \ 386 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 387 flags&LLONGINT ? GETARG(long long) : \ 388 flags&LONGINT ? GETARG(long) : \ 389 flags&PTRINT ? GETARG(ptrdiff_t) : \ 390 flags&SIZEINT ? GETARG(ssize_t) : \ 391 flags&SHORTINT ? (short)GETARG(int) : \ 392 flags&CHARINT ? (__signed char)GETARG(int) : \ 393 GETARG(int))) 394 #define UARG() \ 395 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 396 flags&LLONGINT ? GETARG(unsigned long long) : \ 397 flags&LONGINT ? GETARG(unsigned long) : \ 398 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 399 flags&SIZEINT ? GETARG(size_t) : \ 400 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 401 flags&CHARINT ? (unsigned char)GETARG(int) : \ 402 GETARG(unsigned int))) 403 404 /* 405 * Append a digit to a value and check for overflow. 406 */ 407 #define APPEND_DIGIT(val, dig) do { \ 408 if ((val) > INT_MAX / 10) \ 409 goto overflow; \ 410 (val) *= 10; \ 411 if ((val) > INT_MAX - to_digit((dig))) \ 412 goto overflow; \ 413 (val) += to_digit((dig)); \ 414 } while (0) 415 416 /* 417 * Get * arguments, including the form *nn$. Preserve the nextarg 418 * that the argument can be gotten once the type is determined. 419 */ 420 #define GETASTER(val) \ 421 n2 = 0; \ 422 cp = fmt; \ 423 while (is_digit(*cp)) { \ 424 APPEND_DIGIT(n2, *cp); \ 425 cp++; \ 426 } \ 427 if (*cp == '$') { \ 428 int hold = nextarg; \ 429 if (argtable == NULL) { \ 430 argtable = statargtable; \ 431 __find_arguments(fmt0, orgap, &argtable, &argtablesiz); \ 432 } \ 433 nextarg = n2; \ 434 val = GETARG(int); \ 435 nextarg = hold; \ 436 fmt = ++cp; \ 437 } else { \ 438 val = GETARG(int); \ 439 } 440 441 /* 442 * Get the argument indexed by nextarg. If the argument table is 443 * built, use it to get the argument. If its not, get the next 444 * argument (and arguments must be gotten sequentially). 445 */ 446 #define GETARG(type) \ 447 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 448 (nextarg++, va_arg(ap, type))) 449 450 _SET_ORIENTATION(fp, 1); 451 /* sorry, fwprintf(read_only_file, "") returns EOF, not 0 */ 452 if (cantwrite(fp)) { 453 errno = EBADF; 454 return (EOF); 455 } 456 457 /* optimise fwprintf(stderr) (and other unbuffered Unix files) */ 458 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 459 fp->_file >= 0) 460 return (__sbprintf(fp, fmt0, ap)); 461 462 fmt = (wchar_t *)fmt0; 463 argtable = NULL; 464 nextarg = 1; 465 va_copy(orgap, ap); 466 uio.uio_iov = iov; 467 uio.uio_resid = 0; 468 uio.uio_iovcnt = 0; 469 ret = 0; 470 convbuf = NULL; 471 472 /* 473 * Scan the format for conversions (`%' character). 474 */ 475 for (;;) { 476 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 477 continue; 478 if (fmt != cp) { 479 ptrdiff_t m = fmt - cp; 480 if (m < 0 || m > INT_MAX - ret) 481 goto overflow; 482 PRINT(cp, m); 483 ret += m; 484 } 485 if (ch == '\0') 486 goto done; 487 fmt++; /* skip over '%' */ 488 489 flags = 0; 490 dprec = 0; 491 width = 0; 492 prec = -1; 493 sign = '\0'; 494 ox[1] = '\0'; 495 496 rflag: ch = *fmt++; 497 reswitch: switch (ch) { 498 case ' ': 499 /* 500 * ``If the space and + flags both appear, the space 501 * flag will be ignored.'' 502 * -- ANSI X3J11 503 */ 504 if (!sign) 505 sign = ' '; 506 goto rflag; 507 case '#': 508 flags |= ALT; 509 goto rflag; 510 case '\'': 511 /* grouping not implemented */ 512 goto rflag; 513 case '*': 514 /* 515 * ``A negative field width argument is taken as a 516 * - flag followed by a positive field width.'' 517 * -- ANSI X3J11 518 * They don't exclude field widths read from args. 519 */ 520 GETASTER(width); 521 if (width >= 0) 522 goto rflag; 523 if (width == INT_MIN) 524 goto overflow; 525 width = -width; 526 /* FALLTHROUGH */ 527 case '-': 528 flags |= LADJUST; 529 goto rflag; 530 case '+': 531 sign = '+'; 532 goto rflag; 533 case '.': 534 if ((ch = *fmt++) == '*') { 535 GETASTER(n); 536 prec = n < 0 ? -1 : n; 537 goto rflag; 538 } 539 n = 0; 540 while (is_digit(ch)) { 541 APPEND_DIGIT(n, ch); 542 ch = *fmt++; 543 } 544 if (ch == '$') { 545 nextarg = n; 546 if (argtable == NULL) { 547 argtable = statargtable; 548 __find_arguments(fmt0, orgap, 549 &argtable, &argtablesiz); 550 } 551 goto rflag; 552 } 553 prec = n; 554 goto reswitch; 555 case '0': 556 /* 557 * ``Note that 0 is taken as a flag, not as the 558 * beginning of a field width.'' 559 * -- ANSI X3J11 560 */ 561 flags |= ZEROPAD; 562 goto rflag; 563 case '1': case '2': case '3': case '4': 564 case '5': case '6': case '7': case '8': case '9': 565 n = 0; 566 do { 567 APPEND_DIGIT(n, ch); 568 ch = *fmt++; 569 } while (is_digit(ch)); 570 if (ch == '$') { 571 nextarg = n; 572 if (argtable == NULL) { 573 argtable = statargtable; 574 __find_arguments(fmt0, orgap, 575 &argtable, &argtablesiz); 576 } 577 goto rflag; 578 } 579 width = n; 580 goto reswitch; 581 #ifdef FLOATING_POINT 582 case 'L': 583 flags |= LONGDBL; 584 goto rflag; 585 #endif 586 case 'h': 587 if (*fmt == 'h') { 588 fmt++; 589 flags |= CHARINT; 590 } else { 591 flags |= SHORTINT; 592 } 593 goto rflag; 594 case 'j': 595 flags |= MAXINT; 596 goto rflag; 597 case 'l': 598 if (*fmt == 'l') { 599 fmt++; 600 flags |= LLONGINT; 601 } else { 602 flags |= LONGINT; 603 } 604 goto rflag; 605 case 'q': 606 flags |= LLONGINT; 607 goto rflag; 608 case 't': 609 flags |= PTRINT; 610 goto rflag; 611 case 'z': 612 flags |= SIZEINT; 613 goto rflag; 614 case 'C': 615 flags |= LONGINT; 616 /*FALLTHROUGH*/ 617 case 'c': 618 if (flags & LONGINT) 619 *(cp = buf) = (wchar_t)GETARG(wint_t); 620 else 621 *(cp = buf) = (wchar_t)btowc(GETARG(int)); 622 size = 1; 623 sign = '\0'; 624 break; 625 case 'D': 626 flags |= LONGINT; 627 /*FALLTHROUGH*/ 628 case 'd': 629 case 'i': 630 _umax = SARG(); 631 if ((intmax_t)_umax < 0) { 632 _umax = -_umax; 633 sign = '-'; 634 } 635 base = DEC; 636 goto number; 637 #ifdef FLOATING_POINT 638 case 'a': 639 case 'A': 640 if (ch == 'a') { 641 ox[1] = 'x'; 642 xdigs = xdigs_lower; 643 expchar = 'p'; 644 } else { 645 ox[1] = 'X'; 646 xdigs = xdigs_upper; 647 expchar = 'P'; 648 } 649 if (prec >= 0) 650 prec++; 651 if (dtoaresult) 652 __freedtoa(dtoaresult); 653 if (flags & LONGDBL) { 654 fparg.ldbl = GETARG(long double); 655 dtoaresult = 656 __hldtoa(fparg.ldbl, xdigs, prec, 657 &expt, &signflag, &dtoaend); 658 if (dtoaresult == NULL) { 659 errno = ENOMEM; 660 goto error; 661 } 662 } else { 663 fparg.dbl = GETARG(double); 664 dtoaresult = 665 __hdtoa(fparg.dbl, xdigs, prec, 666 &expt, &signflag, &dtoaend); 667 if (dtoaresult == NULL) { 668 errno = ENOMEM; 669 goto error; 670 } 671 } 672 if (prec < 0) 673 prec = dtoaend - dtoaresult; 674 if (expt == INT_MAX) 675 ox[1] = '\0'; 676 if (convbuf) { 677 free(convbuf); 678 convbuf = NULL; 679 } 680 cp = convbuf = __mbsconv(dtoaresult, -1); 681 if (cp == NULL) 682 goto error; 683 ndig = dtoaend - dtoaresult; 684 goto fp_common; 685 case 'e': 686 case 'E': 687 expchar = ch; 688 if (prec < 0) /* account for digit before decpt */ 689 prec = DEFPREC + 1; 690 else 691 prec++; 692 goto fp_begin; 693 case 'f': 694 case 'F': 695 expchar = '\0'; 696 goto fp_begin; 697 case 'g': 698 case 'G': 699 expchar = ch - ('g' - 'e'); 700 if (prec == 0) 701 prec = 1; 702 fp_begin: 703 if (prec < 0) 704 prec = DEFPREC; 705 if (dtoaresult) 706 __freedtoa(dtoaresult); 707 if (flags & LONGDBL) { 708 fparg.ldbl = GETARG(long double); 709 dtoaresult = 710 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 711 &expt, &signflag, &dtoaend); 712 if (dtoaresult == NULL) { 713 errno = ENOMEM; 714 goto error; 715 } 716 } else { 717 fparg.dbl = GETARG(double); 718 dtoaresult = 719 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 720 &expt, &signflag, &dtoaend); 721 if (dtoaresult == NULL) { 722 errno = ENOMEM; 723 goto error; 724 } 725 if (expt == 9999) 726 expt = INT_MAX; 727 } 728 if (convbuf) { 729 free(convbuf); 730 convbuf = NULL; 731 } 732 cp = convbuf = __mbsconv(dtoaresult, -1); 733 if (cp == NULL) 734 goto error; 735 ndig = dtoaend - dtoaresult; 736 fp_common: 737 if (signflag) 738 sign = '-'; 739 if (expt == INT_MAX) { /* inf or nan */ 740 if (*cp == 'N') { 741 cp = (ch >= 'a') ? L"nan" : L"NAN"; 742 sign = '\0'; 743 } else 744 cp = (ch >= 'a') ? L"inf" : L"INF"; 745 size = 3; 746 flags &= ~ZEROPAD; 747 break; 748 } 749 flags |= FPT; 750 if (ch == 'g' || ch == 'G') { 751 if (expt > -4 && expt <= prec) { 752 /* Make %[gG] smell like %[fF] */ 753 expchar = '\0'; 754 if (flags & ALT) 755 prec -= expt; 756 else 757 prec = ndig - expt; 758 if (prec < 0) 759 prec = 0; 760 } else { 761 /* 762 * Make %[gG] smell like %[eE], but 763 * trim trailing zeroes if no # flag. 764 */ 765 if (!(flags & ALT)) 766 prec = ndig; 767 } 768 } 769 if (expchar) { 770 expsize = exponent(expstr, expt - 1, expchar); 771 size = expsize + prec; 772 if (prec > 1 || flags & ALT) 773 ++size; 774 } else { 775 /* space for digits before decimal point */ 776 if (expt > 0) 777 size = expt; 778 else /* "0" */ 779 size = 1; 780 /* space for decimal pt and following digits */ 781 if (prec || flags & ALT) 782 size += prec + 1; 783 lead = expt; 784 } 785 break; 786 #endif /* FLOATING_POINT */ 787 case 'n': 788 if (flags & LLONGINT) 789 *GETARG(long long *) = ret; 790 else if (flags & LONGINT) 791 *GETARG(long *) = ret; 792 else if (flags & SHORTINT) 793 *GETARG(short *) = ret; 794 else if (flags & CHARINT) 795 *GETARG(__signed char *) = ret; 796 else if (flags & PTRINT) 797 *GETARG(ptrdiff_t *) = ret; 798 else if (flags & SIZEINT) 799 *GETARG(ssize_t *) = ret; 800 else if (flags & MAXINT) 801 *GETARG(intmax_t *) = ret; 802 else 803 *GETARG(int *) = ret; 804 continue; /* no output */ 805 case 'O': 806 flags |= LONGINT; 807 /*FALLTHROUGH*/ 808 case 'o': 809 _umax = UARG(); 810 base = OCT; 811 goto nosign; 812 case 'p': 813 /* 814 * ``The argument shall be a pointer to void. The 815 * value of the pointer is converted to a sequence 816 * of printable characters, in an implementation- 817 * defined manner.'' 818 * -- ANSI X3J11 819 */ 820 /* NOSTRICT */ 821 _umax = (u_long)GETARG(void *); 822 base = HEX; 823 xdigs = xdigs_lower; 824 ox[1] = 'x'; 825 goto nosign; 826 case 'S': 827 flags |= LONGINT; 828 /*FALLTHROUGH*/ 829 case 's': 830 if (flags & LONGINT) { 831 if ((cp = GETARG(wchar_t *)) == NULL) 832 cp = L"(null)"; 833 } else { 834 char *mbsarg; 835 if ((mbsarg = GETARG(char *)) == NULL) 836 mbsarg = "(null)"; 837 if (convbuf) { 838 free(convbuf); 839 convbuf = NULL; 840 } 841 convbuf = __mbsconv(mbsarg, prec); 842 if (convbuf == NULL) { 843 fp->_flags |= __SERR; 844 goto error; 845 } else 846 cp = convbuf; 847 } 848 if (prec >= 0) { 849 /* 850 * can't use wcslen; can only look for the 851 * NUL in the first `prec' characters, and 852 * wcslen() will go further. 853 */ 854 wchar_t *p = wmemchr(cp, 0, prec); 855 856 size = p ? (p - cp) : prec; 857 } else { 858 size_t len; 859 860 if ((len = wcslen(cp)) > INT_MAX) 861 goto overflow; 862 size = (int)len; 863 } 864 sign = '\0'; 865 break; 866 case 'U': 867 flags |= LONGINT; 868 /*FALLTHROUGH*/ 869 case 'u': 870 _umax = UARG(); 871 base = DEC; 872 goto nosign; 873 case 'X': 874 xdigs = xdigs_upper; 875 goto hex; 876 case 'x': 877 xdigs = xdigs_lower; 878 hex: _umax = UARG(); 879 base = HEX; 880 /* leading 0x/X only if non-zero */ 881 if (flags & ALT && _umax != 0) 882 ox[1] = ch; 883 884 /* unsigned conversions */ 885 nosign: sign = '\0'; 886 /* 887 * ``... diouXx conversions ... if a precision is 888 * specified, the 0 flag will be ignored.'' 889 * -- ANSI X3J11 890 */ 891 number: if ((dprec = prec) >= 0) 892 flags &= ~ZEROPAD; 893 894 /* 895 * ``The result of converting a zero value with an 896 * explicit precision of zero is no characters.'' 897 * -- ANSI X3J11 898 */ 899 cp = buf + BUF; 900 if (_umax != 0 || prec != 0) { 901 /* 902 * Unsigned mod is hard, and unsigned mod 903 * by a constant is easier than that by 904 * a variable; hence this switch. 905 */ 906 switch (base) { 907 case OCT: 908 do { 909 *--cp = to_char(_umax & 7); 910 _umax >>= 3; 911 } while (_umax); 912 /* handle octal leading 0 */ 913 if (flags & ALT && *cp != '0') 914 *--cp = '0'; 915 break; 916 917 case DEC: 918 /* many numbers are 1 digit */ 919 while (_umax >= 10) { 920 *--cp = to_char(_umax % 10); 921 _umax /= 10; 922 } 923 *--cp = to_char(_umax); 924 break; 925 926 case HEX: 927 do { 928 *--cp = xdigs[_umax & 15]; 929 _umax >>= 4; 930 } while (_umax); 931 break; 932 933 default: 934 cp = L"bug in vfwprintf: bad base"; 935 size = wcslen(cp); 936 goto skipsize; 937 } 938 } 939 size = buf + BUF - cp; 940 if (size > BUF) /* should never happen */ 941 abort(); 942 skipsize: 943 break; 944 default: /* "%?" prints ?, unless ? is NUL */ 945 if (ch == '\0') 946 goto done; 947 /* pretend it was %c with argument ch */ 948 cp = buf; 949 *cp = ch; 950 size = 1; 951 sign = '\0'; 952 break; 953 } 954 955 /* 956 * All reasonable formats wind up here. At this point, `cp' 957 * points to a string which (if not flags&LADJUST) should be 958 * padded out to `width' places. If flags&ZEROPAD, it should 959 * first be prefixed by any sign or other prefix; otherwise, 960 * it should be blank padded before the prefix is emitted. 961 * After any left-hand padding and prefixing, emit zeroes 962 * required by a decimal %[diouxX] precision, then print the 963 * string proper, then emit zeroes required by any leftover 964 * floating precision; finally, if LADJUST, pad with blanks. 965 * 966 * Compute actual size, so we know how much to pad. 967 * size excludes decimal prec; realsz includes it. 968 */ 969 realsz = dprec > size ? dprec : size; 970 if (sign) 971 realsz++; 972 if (ox[1]) 973 realsz+= 2; 974 975 /* right-adjusting blank padding */ 976 if ((flags & (LADJUST|ZEROPAD)) == 0) 977 PAD(width - realsz, blanks); 978 979 /* prefix */ 980 if (sign) 981 PRINT(&sign, 1); 982 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 983 ox[0] = '0'; 984 PRINT(ox, 2); 985 } 986 987 /* right-adjusting zero padding */ 988 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 989 PAD(width - realsz, zeroes); 990 991 /* leading zeroes from decimal precision */ 992 PAD(dprec - size, zeroes); 993 994 /* the string or number proper */ 995 #ifdef FLOATING_POINT 996 if ((flags & FPT) == 0) { 997 PRINT(cp, size); 998 } else { /* glue together f_p fragments */ 999 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1000 if (expt <= 0) { 1001 PRINT(zeroes, 1); 1002 if (prec || flags & ALT) 1003 PRINT(decimal_point, 1); 1004 PAD(-expt, zeroes); 1005 /* already handled initial 0's */ 1006 prec += expt; 1007 } else { 1008 PRINTANDPAD(cp, convbuf + ndig, 1009 lead, zeroes); 1010 cp += lead; 1011 if (prec || flags & ALT) 1012 PRINT(decimal_point, 1); 1013 } 1014 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes); 1015 } else { /* %[eE] or sufficiently long %[gG] */ 1016 if (prec > 1 || flags & ALT) { 1017 buf[0] = *cp++; 1018 buf[1] = *decimal_point; 1019 PRINT(buf, 2); 1020 PRINT(cp, ndig-1); 1021 PAD(prec - ndig, zeroes); 1022 } else { /* XeYYY */ 1023 PRINT(cp, 1); 1024 } 1025 PRINT(expstr, expsize); 1026 } 1027 } 1028 #else 1029 PRINT(cp, size); 1030 #endif 1031 /* left-adjusting padding (always blank) */ 1032 if (flags & LADJUST) 1033 PAD(width - realsz, blanks); 1034 1035 /* finally, adjust ret */ 1036 if (width < realsz) 1037 width = realsz; 1038 if (width > INT_MAX - ret) 1039 goto overflow; 1040 ret += width; 1041 } 1042 done: 1043 error: 1044 va_end(orgap); 1045 if (__sferror(fp)) 1046 ret = -1; 1047 goto finish; 1048 1049 overflow: 1050 errno = ENOMEM; 1051 ret = -1; 1052 1053 finish: 1054 if (convbuf) 1055 free(convbuf); 1056 #ifdef FLOATING_POINT 1057 if (dtoaresult) 1058 __freedtoa(dtoaresult); 1059 #endif 1060 if (argtable != NULL && argtable != statargtable) { 1061 munmap(argtable, argtablesiz); 1062 argtable = NULL; 1063 } 1064 return (ret); 1065 } 1066 1067 int 1068 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap) 1069 { 1070 int r; 1071 1072 FLOCKFILE(fp); 1073 r = __vfwprintf(fp, fmt0, ap); 1074 FUNLOCKFILE(fp); 1075 1076 return (r); 1077 } 1078 1079 /* 1080 * Type ids for argument type table. 1081 */ 1082 #define T_UNUSED 0 1083 #define T_SHORT 1 1084 #define T_U_SHORT 2 1085 #define TP_SHORT 3 1086 #define T_INT 4 1087 #define T_U_INT 5 1088 #define TP_INT 6 1089 #define T_LONG 7 1090 #define T_U_LONG 8 1091 #define TP_LONG 9 1092 #define T_LLONG 10 1093 #define T_U_LLONG 11 1094 #define TP_LLONG 12 1095 #define T_DOUBLE 13 1096 #define T_LONG_DOUBLE 14 1097 #define TP_CHAR 15 1098 #define TP_VOID 16 1099 #define T_PTRINT 17 1100 #define TP_PTRINT 18 1101 #define T_SIZEINT 19 1102 #define T_SSIZEINT 20 1103 #define TP_SSIZEINT 21 1104 #define T_MAXINT 22 1105 #define T_MAXUINT 23 1106 #define TP_MAXINT 24 1107 #define T_CHAR 25 1108 #define T_U_CHAR 26 1109 #define T_WINT 27 1110 #define TP_WCHAR 28 1111 1112 /* 1113 * Find all arguments when a positional parameter is encountered. Returns a 1114 * table, indexed by argument number, of pointers to each arguments. The 1115 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1116 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1117 * used since we are attempting to make snprintf thread safe, and alloca is 1118 * problematic since we have nested functions..) 1119 */ 1120 static int 1121 __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable, 1122 size_t *argtablesiz) 1123 { 1124 wchar_t *fmt; /* format string */ 1125 int ch; /* character from fmt */ 1126 int n, n2; /* handy integer (short term usage) */ 1127 wchar_t *cp; /* handy char pointer (short term usage) */ 1128 int flags; /* flags as above */ 1129 unsigned char *typetable; /* table of types */ 1130 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1131 int tablesize; /* current size of type table */ 1132 int tablemax; /* largest used index in table */ 1133 int nextarg; /* 1-based argument index */ 1134 int ret = 0; /* return value */ 1135 1136 /* 1137 * Add an argument type to the table, expanding if necessary. 1138 */ 1139 #define ADDTYPE(type) \ 1140 ((nextarg >= tablesize) ? \ 1141 __grow_type_table(&typetable, &tablesize) : 0, \ 1142 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1143 typetable[nextarg++] = type) 1144 1145 #define ADDSARG() \ 1146 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1147 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1148 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1149 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1150 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1151 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1152 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1153 1154 #define ADDUARG() \ 1155 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1156 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1157 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1158 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1159 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1160 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1161 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1162 1163 /* 1164 * Add * arguments to the type array. 1165 */ 1166 #define ADDASTER() \ 1167 n2 = 0; \ 1168 cp = fmt; \ 1169 while (is_digit(*cp)) { \ 1170 APPEND_DIGIT(n2, *cp); \ 1171 cp++; \ 1172 } \ 1173 if (*cp == '$') { \ 1174 int hold = nextarg; \ 1175 nextarg = n2; \ 1176 ADDTYPE(T_INT); \ 1177 nextarg = hold; \ 1178 fmt = ++cp; \ 1179 } else { \ 1180 ADDTYPE(T_INT); \ 1181 } 1182 fmt = (wchar_t *)fmt0; 1183 typetable = stattypetable; 1184 tablesize = STATIC_ARG_TBL_SIZE; 1185 tablemax = 0; 1186 nextarg = 1; 1187 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1188 1189 /* 1190 * Scan the format for conversions (`%' character). 1191 */ 1192 for (;;) { 1193 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1194 continue; 1195 if (ch == '\0') 1196 goto done; 1197 fmt++; /* skip over '%' */ 1198 1199 flags = 0; 1200 1201 rflag: ch = *fmt++; 1202 reswitch: switch (ch) { 1203 case ' ': 1204 case '#': 1205 case '\'': 1206 goto rflag; 1207 case '*': 1208 ADDASTER(); 1209 goto rflag; 1210 case '-': 1211 case '+': 1212 goto rflag; 1213 case '.': 1214 if ((ch = *fmt++) == '*') { 1215 ADDASTER(); 1216 goto rflag; 1217 } 1218 while (is_digit(ch)) { 1219 ch = *fmt++; 1220 } 1221 goto reswitch; 1222 case '0': 1223 goto rflag; 1224 case '1': case '2': case '3': case '4': 1225 case '5': case '6': case '7': case '8': case '9': 1226 n = 0; 1227 do { 1228 APPEND_DIGIT(n ,ch); 1229 ch = *fmt++; 1230 } while (is_digit(ch)); 1231 if (ch == '$') { 1232 nextarg = n; 1233 goto rflag; 1234 } 1235 goto reswitch; 1236 #ifdef FLOATING_POINT 1237 case 'L': 1238 flags |= LONGDBL; 1239 goto rflag; 1240 #endif 1241 case 'h': 1242 if (*fmt == 'h') { 1243 fmt++; 1244 flags |= CHARINT; 1245 } else { 1246 flags |= SHORTINT; 1247 } 1248 goto rflag; 1249 case 'l': 1250 if (*fmt == 'l') { 1251 fmt++; 1252 flags |= LLONGINT; 1253 } else { 1254 flags |= LONGINT; 1255 } 1256 goto rflag; 1257 case 'q': 1258 flags |= LLONGINT; 1259 goto rflag; 1260 case 't': 1261 flags |= PTRINT; 1262 goto rflag; 1263 case 'z': 1264 flags |= SIZEINT; 1265 goto rflag; 1266 case 'C': 1267 flags |= LONGINT; 1268 /*FALLTHROUGH*/ 1269 case 'c': 1270 if (flags & LONGINT) 1271 ADDTYPE(T_WINT); 1272 else 1273 ADDTYPE(T_INT); 1274 break; 1275 case 'D': 1276 flags |= LONGINT; 1277 /*FALLTHROUGH*/ 1278 case 'd': 1279 case 'i': 1280 ADDSARG(); 1281 break; 1282 #ifdef FLOATING_POINT 1283 case 'a': 1284 case 'A': 1285 case 'e': 1286 case 'E': 1287 case 'f': 1288 case 'F': 1289 case 'g': 1290 case 'G': 1291 if (flags & LONGDBL) 1292 ADDTYPE(T_LONG_DOUBLE); 1293 else 1294 ADDTYPE(T_DOUBLE); 1295 break; 1296 #endif /* FLOATING_POINT */ 1297 case 'n': 1298 if (flags & LLONGINT) 1299 ADDTYPE(TP_LLONG); 1300 else if (flags & LONGINT) 1301 ADDTYPE(TP_LONG); 1302 else if (flags & SHORTINT) 1303 ADDTYPE(TP_SHORT); 1304 else if (flags & PTRINT) 1305 ADDTYPE(TP_PTRINT); 1306 else if (flags & SIZEINT) 1307 ADDTYPE(TP_SSIZEINT); 1308 else if (flags & MAXINT) 1309 ADDTYPE(TP_MAXINT); 1310 else 1311 ADDTYPE(TP_INT); 1312 continue; /* no output */ 1313 case 'O': 1314 flags |= LONGINT; 1315 /*FALLTHROUGH*/ 1316 case 'o': 1317 ADDUARG(); 1318 break; 1319 case 'p': 1320 ADDTYPE(TP_VOID); 1321 break; 1322 case 'S': 1323 flags |= LONGINT; 1324 /*FALLTHROUGH*/ 1325 case 's': 1326 if (flags & LONGINT) 1327 ADDTYPE(TP_CHAR); 1328 else 1329 ADDTYPE(TP_WCHAR); 1330 break; 1331 case 'U': 1332 flags |= LONGINT; 1333 /*FALLTHROUGH*/ 1334 case 'u': 1335 case 'X': 1336 case 'x': 1337 ADDUARG(); 1338 break; 1339 default: /* "%?" prints ?, unless ? is NUL */ 1340 if (ch == '\0') 1341 goto done; 1342 break; 1343 } 1344 } 1345 done: 1346 /* 1347 * Build the argument table. 1348 */ 1349 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1350 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1351 *argtable = mmap(NULL, *argtablesiz, 1352 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1353 if (*argtable == MAP_FAILED) 1354 return (-1); 1355 } 1356 1357 #if 0 1358 /* XXX is this required? */ 1359 (*argtable)[0].intarg = 0; 1360 #endif 1361 for (n = 1; n <= tablemax; n++) { 1362 switch (typetable[n]) { 1363 case T_UNUSED: 1364 case T_CHAR: 1365 case T_U_CHAR: 1366 case T_SHORT: 1367 case T_U_SHORT: 1368 case T_INT: 1369 (*argtable)[n].intarg = va_arg(ap, int); 1370 break; 1371 case TP_SHORT: 1372 (*argtable)[n].pshortarg = va_arg(ap, short *); 1373 break; 1374 case T_U_INT: 1375 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1376 break; 1377 case TP_INT: 1378 (*argtable)[n].pintarg = va_arg(ap, int *); 1379 break; 1380 case T_LONG: 1381 (*argtable)[n].longarg = va_arg(ap, long); 1382 break; 1383 case T_U_LONG: 1384 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1385 break; 1386 case TP_LONG: 1387 (*argtable)[n].plongarg = va_arg(ap, long *); 1388 break; 1389 case T_LLONG: 1390 (*argtable)[n].longlongarg = va_arg(ap, long long); 1391 break; 1392 case T_U_LLONG: 1393 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1394 break; 1395 case TP_LLONG: 1396 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1397 break; 1398 #ifdef FLOATING_POINT 1399 case T_DOUBLE: 1400 (*argtable)[n].doublearg = va_arg(ap, double); 1401 break; 1402 case T_LONG_DOUBLE: 1403 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1404 break; 1405 #endif 1406 case TP_CHAR: 1407 (*argtable)[n].pchararg = va_arg(ap, char *); 1408 break; 1409 case TP_VOID: 1410 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1411 break; 1412 case T_PTRINT: 1413 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1414 break; 1415 case TP_PTRINT: 1416 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1417 break; 1418 case T_SIZEINT: 1419 (*argtable)[n].sizearg = va_arg(ap, size_t); 1420 break; 1421 case T_SSIZEINT: 1422 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1423 break; 1424 case TP_SSIZEINT: 1425 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1426 break; 1427 case TP_MAXINT: 1428 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1429 break; 1430 case T_WINT: 1431 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1432 break; 1433 case TP_WCHAR: 1434 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1435 break; 1436 } 1437 } 1438 goto finish; 1439 1440 overflow: 1441 errno = ENOMEM; 1442 ret = -1; 1443 1444 finish: 1445 if (typetable != NULL && typetable != stattypetable) { 1446 munmap(typetable, *argtablesiz); 1447 typetable = NULL; 1448 } 1449 return (ret); 1450 } 1451 1452 /* 1453 * Increase the size of the type table. 1454 */ 1455 static int 1456 __grow_type_table(unsigned char **typetable, int *tablesize) 1457 { 1458 unsigned char *oldtable = *typetable; 1459 int newsize = *tablesize * 2; 1460 1461 if (newsize < getpagesize()) 1462 newsize = getpagesize(); 1463 1464 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1465 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1466 MAP_ANON|MAP_PRIVATE, -1, 0); 1467 if (*typetable == MAP_FAILED) 1468 return (-1); 1469 bcopy(oldtable, *typetable, *tablesize); 1470 } else { 1471 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1472 MAP_ANON|MAP_PRIVATE, -1, 0); 1473 if (new == MAP_FAILED) 1474 return (-1); 1475 memmove(new, *typetable, *tablesize); 1476 munmap(*typetable, *tablesize); 1477 *typetable = new; 1478 } 1479 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1480 1481 *tablesize = newsize; 1482 return (0); 1483 } 1484 1485 1486 #ifdef FLOATING_POINT 1487 static int 1488 exponent(wchar_t *p0, int exp, int fmtch) 1489 { 1490 wchar_t *p, *t; 1491 wchar_t expbuf[MAXEXPDIG]; 1492 1493 p = p0; 1494 *p++ = fmtch; 1495 if (exp < 0) { 1496 exp = -exp; 1497 *p++ = '-'; 1498 } else 1499 *p++ = '+'; 1500 t = expbuf + MAXEXPDIG; 1501 if (exp > 9) { 1502 do { 1503 *--t = to_char(exp % 10); 1504 } while ((exp /= 10) > 9); 1505 *--t = to_char(exp); 1506 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1507 /* nothing */; 1508 } else { 1509 /* 1510 * Exponents for decimal floating point conversions 1511 * (%[eEgG]) must be at least two characters long, 1512 * whereas exponents for hexadecimal conversions can 1513 * be only one character long. 1514 */ 1515 if (fmtch == 'e' || fmtch == 'E') 1516 *p++ = '0'; 1517 *p++ = to_char(exp); 1518 } 1519 return (p - p0); 1520 } 1521 #endif /* FLOATING_POINT */ 1522