1 /* $OpenBSD: vfwprintf.c,v 1.15 2015/12/28 22:08:18 mmcc 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 <unistd.h> 53 54 #include "local.h" 55 #include "fvwrite.h" 56 57 union arg { 58 int intarg; 59 unsigned int uintarg; 60 long longarg; 61 unsigned long ulongarg; 62 long long longlongarg; 63 unsigned long long ulonglongarg; 64 ptrdiff_t ptrdiffarg; 65 size_t sizearg; 66 ssize_t ssizearg; 67 intmax_t intmaxarg; 68 uintmax_t uintmaxarg; 69 void *pvoidarg; 70 char *pchararg; 71 signed char *pschararg; 72 short *pshortarg; 73 int *pintarg; 74 long *plongarg; 75 long long *plonglongarg; 76 ptrdiff_t *pptrdiffarg; 77 ssize_t *pssizearg; 78 intmax_t *pintmaxarg; 79 #ifdef FLOATING_POINT 80 double doublearg; 81 long double longdoublearg; 82 #endif 83 wint_t wintarg; 84 wchar_t *pwchararg; 85 }; 86 87 static int __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable, 88 size_t *argtablesiz); 89 static int __grow_type_table(unsigned char **typetable, int *tablesize); 90 91 /* 92 * Helper function for `fprintf to unbuffered unix file': creates a 93 * temporary buffer. We only work on write-only files; this avoids 94 * worries about ungetc buffers and so forth. 95 */ 96 static int 97 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap) 98 { 99 int ret; 100 FILE fake; 101 struct __sfileext fakeext; 102 unsigned char buf[BUFSIZ]; 103 104 _FILEEXT_SETUP(&fake, &fakeext); 105 /* copy the important variables */ 106 fake._flags = fp->_flags & ~__SNBF; 107 fake._file = fp->_file; 108 fake._cookie = fp->_cookie; 109 fake._write = fp->_write; 110 111 /* set up the buffer */ 112 fake._bf._base = fake._p = buf; 113 fake._bf._size = fake._w = sizeof(buf); 114 fake._lbfsize = 0; /* not actually used, but Just In Case */ 115 116 /* do the work, then copy any error status */ 117 ret = __vfwprintf(&fake, fmt, ap); 118 if (ret >= 0 && __sflush(&fake)) 119 ret = EOF; 120 if (fake._flags & __SERR) 121 fp->_flags |= __SERR; 122 return (ret); 123 } 124 125 /* 126 * Like __fputwc_unlock, but handles fake string (__SSTR) files properly. 127 * File must already be locked. 128 */ 129 static wint_t 130 __xfputwc(wchar_t wc, FILE *fp) 131 { 132 mbstate_t mbs; 133 char buf[MB_LEN_MAX]; 134 struct __suio uio; 135 struct __siov iov; 136 size_t len; 137 138 if ((fp->_flags & __SSTR) == 0) 139 return (__fputwc_unlock(wc, fp)); 140 141 bzero(&mbs, sizeof(mbs)); 142 len = wcrtomb(buf, wc, &mbs); 143 if (len == (size_t)-1) { 144 fp->_flags |= __SERR; 145 errno = EILSEQ; 146 return (WEOF); 147 } 148 uio.uio_iov = &iov; 149 uio.uio_resid = len; 150 uio.uio_iovcnt = 1; 151 iov.iov_base = buf; 152 iov.iov_len = len; 153 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF); 154 } 155 156 /* 157 * Convert a multibyte character string argument for the %s format to a wide 158 * string representation. ``prec'' specifies the maximum number of bytes 159 * to output. If ``prec'' is greater than or equal to zero, we can't assume 160 * that the multibyte character string ends in a null character. 161 * 162 * Returns NULL on failure. 163 * To find out what happened check errno for ENOMEM, EILSEQ and EINVAL. 164 */ 165 static wchar_t * 166 __mbsconv(char *mbsarg, int prec) 167 { 168 mbstate_t mbs; 169 wchar_t *convbuf, *wcp; 170 const char *p; 171 size_t insize, nchars, nconv; 172 173 if (mbsarg == NULL) 174 return (NULL); 175 176 /* 177 * Supplied argument is a multibyte string; convert it to wide 178 * characters first. 179 */ 180 if (prec >= 0) { 181 /* 182 * String is not guaranteed to be NUL-terminated. Find the 183 * number of characters to print. 184 */ 185 p = mbsarg; 186 insize = nchars = nconv = 0; 187 bzero(&mbs, sizeof(mbs)); 188 while (nchars != (size_t)prec) { 189 nconv = mbrlen(p, MB_CUR_MAX, &mbs); 190 if (nconv == (size_t)0 || nconv == (size_t)-1 || 191 nconv == (size_t)-2) 192 break; 193 p += nconv; 194 nchars++; 195 insize += nconv; 196 } 197 if (nconv == (size_t)-1 || nconv == (size_t)-2) 198 return (NULL); 199 } else 200 insize = strlen(mbsarg); 201 202 /* 203 * Allocate buffer for the result and perform the conversion, 204 * converting at most `size' bytes of the input multibyte string to 205 * wide characters for printing. 206 */ 207 convbuf = calloc(insize + 1, sizeof(*convbuf)); 208 if (convbuf == NULL) 209 return (NULL); 210 wcp = convbuf; 211 p = mbsarg; 212 bzero(&mbs, sizeof(mbs)); 213 nconv = 0; 214 while (insize != 0) { 215 nconv = mbrtowc(wcp, p, insize, &mbs); 216 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2) 217 break; 218 wcp++; 219 p += nconv; 220 insize -= nconv; 221 } 222 if (nconv == (size_t)-1 || nconv == (size_t)-2) { 223 free(convbuf); 224 return (NULL); 225 } 226 *wcp = '\0'; 227 228 return (convbuf); 229 } 230 231 #ifdef FLOATING_POINT 232 #include <float.h> 233 #include <locale.h> 234 #include <math.h> 235 #include "floatio.h" 236 #include "gdtoa.h" 237 238 #define DEFPREC 6 239 240 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 = NULL; 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 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */ 328 wchar_t 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 wchar_t *convbuf; /* buffer for multibyte to wide conversion */ 335 336 /* 337 * Choose PADSIZE to trade efficiency vs. size. If larger printf 338 * fields occur frequently, increase PADSIZE and make the initialisers 339 * below longer. 340 */ 341 #define PADSIZE 16 /* pad chunk size */ 342 static wchar_t blanks[PADSIZE] = 343 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 344 static wchar_t zeroes[PADSIZE] = 345 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 346 347 static const char xdigs_lower[16] = "0123456789abcdef"; 348 static const char xdigs_upper[16] = "0123456789ABCDEF"; 349 350 /* 351 * BEWARE, these `goto error' on error, PRINT uses 'n3', 352 * PAD uses `n' and 'n3', and PRINTANDPAD uses 'n', 'n2', and 'n3'. 353 */ 354 #define PRINT(ptr, len) do { \ 355 for (n3 = 0; n3 < (len); n3++) { \ 356 if ((__xfputwc((ptr)[n3], fp)) == WEOF) \ 357 goto error; \ 358 } \ 359 } while (0) 360 #define PAD(howmany, with) do { \ 361 if ((n = (howmany)) > 0) { \ 362 while (n > PADSIZE) { \ 363 PRINT(with, PADSIZE); \ 364 n -= PADSIZE; \ 365 } \ 366 PRINT(with, n); \ 367 } \ 368 } while (0) 369 #define PRINTANDPAD(p, ep, len, with) do { \ 370 n2 = (ep) - (p); \ 371 if (n2 > (len)) \ 372 n2 = (len); \ 373 if (n2 > 0) \ 374 PRINT((p), n2); \ 375 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 376 } while(0) 377 378 /* 379 * To extend shorts properly, we need both signed and unsigned 380 * argument extraction methods. 381 */ 382 #define SARG() \ 383 ((intmax_t)(flags&MAXINT ? GETARG(intmax_t) : \ 384 flags&LLONGINT ? GETARG(long long) : \ 385 flags&LONGINT ? GETARG(long) : \ 386 flags&PTRINT ? GETARG(ptrdiff_t) : \ 387 flags&SIZEINT ? GETARG(ssize_t) : \ 388 flags&SHORTINT ? (short)GETARG(int) : \ 389 flags&CHARINT ? (signed char)GETARG(int) : \ 390 GETARG(int))) 391 #define UARG() \ 392 ((uintmax_t)(flags&MAXINT ? GETARG(uintmax_t) : \ 393 flags&LLONGINT ? GETARG(unsigned long long) : \ 394 flags&LONGINT ? GETARG(unsigned long) : \ 395 flags&PTRINT ? (uintptr_t)GETARG(ptrdiff_t) : /* XXX */ \ 396 flags&SIZEINT ? GETARG(size_t) : \ 397 flags&SHORTINT ? (unsigned short)GETARG(int) : \ 398 flags&CHARINT ? (unsigned char)GETARG(int) : \ 399 GETARG(unsigned int))) 400 401 /* 402 * Append a digit to a value and check for overflow. 403 */ 404 #define APPEND_DIGIT(val, dig) do { \ 405 if ((val) > INT_MAX / 10) \ 406 goto overflow; \ 407 (val) *= 10; \ 408 if ((val) > INT_MAX - to_digit((dig))) \ 409 goto overflow; \ 410 (val) += to_digit((dig)); \ 411 } while (0) 412 413 /* 414 * Get * arguments, including the form *nn$. Preserve the nextarg 415 * that the argument can be gotten once the type is determined. 416 */ 417 #define GETASTER(val) \ 418 n2 = 0; \ 419 cp = fmt; \ 420 while (is_digit(*cp)) { \ 421 APPEND_DIGIT(n2, *cp); \ 422 cp++; \ 423 } \ 424 if (*cp == '$') { \ 425 int hold = nextarg; \ 426 if (argtable == NULL) { \ 427 argtable = statargtable; \ 428 __find_arguments(fmt0, orgap, &argtable, &argtablesiz); \ 429 } \ 430 nextarg = n2; \ 431 val = GETARG(int); \ 432 nextarg = hold; \ 433 fmt = ++cp; \ 434 } else { \ 435 val = GETARG(int); \ 436 } 437 438 /* 439 * Get the argument indexed by nextarg. If the argument table is 440 * built, use it to get the argument. If its not, get the next 441 * argument (and arguments must be gotten sequentially). 442 */ 443 #define GETARG(type) \ 444 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 445 (nextarg++, va_arg(ap, type))) 446 447 _SET_ORIENTATION(fp, 1); 448 /* sorry, fwprintf(read_only_file, "") returns EOF, not 0 */ 449 if (cantwrite(fp)) { 450 errno = EBADF; 451 return (EOF); 452 } 453 454 /* optimise fwprintf(stderr) (and other unbuffered Unix files) */ 455 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 456 fp->_file >= 0) 457 return (__sbprintf(fp, fmt0, ap)); 458 459 fmt = (wchar_t *)fmt0; 460 argtable = NULL; 461 nextarg = 1; 462 va_copy(orgap, ap); 463 ret = 0; 464 convbuf = NULL; 465 466 /* 467 * Scan the format for conversions (`%' character). 468 */ 469 for (;;) { 470 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 471 continue; 472 if (fmt != cp) { 473 ptrdiff_t m = fmt - cp; 474 if (m < 0 || m > INT_MAX - ret) 475 goto overflow; 476 PRINT(cp, m); 477 ret += m; 478 } 479 if (ch == '\0') 480 goto done; 481 fmt++; /* skip over '%' */ 482 483 flags = 0; 484 dprec = 0; 485 width = 0; 486 prec = -1; 487 sign = '\0'; 488 ox[1] = '\0'; 489 490 rflag: ch = *fmt++; 491 reswitch: switch (ch) { 492 case ' ': 493 /* 494 * ``If the space and + flags both appear, the space 495 * flag will be ignored.'' 496 * -- ANSI X3J11 497 */ 498 if (!sign) 499 sign = ' '; 500 goto rflag; 501 case '#': 502 flags |= ALT; 503 goto rflag; 504 case '\'': 505 /* grouping not implemented */ 506 goto rflag; 507 case '*': 508 /* 509 * ``A negative field width argument is taken as a 510 * - flag followed by a positive field width.'' 511 * -- ANSI X3J11 512 * They don't exclude field widths read from args. 513 */ 514 GETASTER(width); 515 if (width >= 0) 516 goto rflag; 517 if (width == INT_MIN) 518 goto overflow; 519 width = -width; 520 /* FALLTHROUGH */ 521 case '-': 522 flags |= LADJUST; 523 goto rflag; 524 case '+': 525 sign = '+'; 526 goto rflag; 527 case '.': 528 if ((ch = *fmt++) == '*') { 529 GETASTER(n); 530 prec = n < 0 ? -1 : n; 531 goto rflag; 532 } 533 n = 0; 534 while (is_digit(ch)) { 535 APPEND_DIGIT(n, ch); 536 ch = *fmt++; 537 } 538 if (ch == '$') { 539 nextarg = n; 540 if (argtable == NULL) { 541 argtable = statargtable; 542 __find_arguments(fmt0, orgap, 543 &argtable, &argtablesiz); 544 } 545 goto rflag; 546 } 547 prec = n; 548 goto reswitch; 549 case '0': 550 /* 551 * ``Note that 0 is taken as a flag, not as the 552 * beginning of a field width.'' 553 * -- ANSI X3J11 554 */ 555 flags |= ZEROPAD; 556 goto rflag; 557 case '1': case '2': case '3': case '4': 558 case '5': case '6': case '7': case '8': case '9': 559 n = 0; 560 do { 561 APPEND_DIGIT(n, ch); 562 ch = *fmt++; 563 } while (is_digit(ch)); 564 if (ch == '$') { 565 nextarg = n; 566 if (argtable == NULL) { 567 argtable = statargtable; 568 __find_arguments(fmt0, orgap, 569 &argtable, &argtablesiz); 570 } 571 goto rflag; 572 } 573 width = n; 574 goto reswitch; 575 #ifdef FLOATING_POINT 576 case 'L': 577 flags |= LONGDBL; 578 goto rflag; 579 #endif 580 case 'h': 581 if (*fmt == 'h') { 582 fmt++; 583 flags |= CHARINT; 584 } else { 585 flags |= SHORTINT; 586 } 587 goto rflag; 588 case 'j': 589 flags |= MAXINT; 590 goto rflag; 591 case 'l': 592 if (*fmt == 'l') { 593 fmt++; 594 flags |= LLONGINT; 595 } else { 596 flags |= LONGINT; 597 } 598 goto rflag; 599 case 'q': 600 flags |= LLONGINT; 601 goto rflag; 602 case 't': 603 flags |= PTRINT; 604 goto rflag; 605 case 'z': 606 flags |= SIZEINT; 607 goto rflag; 608 case 'C': 609 flags |= LONGINT; 610 /*FALLTHROUGH*/ 611 case 'c': 612 if (flags & LONGINT) 613 *(cp = buf) = (wchar_t)GETARG(wint_t); 614 else 615 *(cp = buf) = (wchar_t)btowc(GETARG(int)); 616 size = 1; 617 sign = '\0'; 618 break; 619 case 'D': 620 flags |= LONGINT; 621 /*FALLTHROUGH*/ 622 case 'd': 623 case 'i': 624 _umax = SARG(); 625 if ((intmax_t)_umax < 0) { 626 _umax = -_umax; 627 sign = '-'; 628 } 629 base = DEC; 630 goto number; 631 #ifdef FLOATING_POINT 632 case 'a': 633 case 'A': 634 if (ch == 'a') { 635 ox[1] = 'x'; 636 xdigs = xdigs_lower; 637 expchar = 'p'; 638 } else { 639 ox[1] = 'X'; 640 xdigs = xdigs_upper; 641 expchar = 'P'; 642 } 643 if (prec >= 0) 644 prec++; 645 if (dtoaresult) 646 __freedtoa(dtoaresult); 647 if (flags & LONGDBL) { 648 fparg.ldbl = GETARG(long double); 649 dtoaresult = 650 __hldtoa(fparg.ldbl, xdigs, prec, 651 &expt, &signflag, &dtoaend); 652 if (dtoaresult == NULL) { 653 errno = ENOMEM; 654 goto error; 655 } 656 } else { 657 fparg.dbl = GETARG(double); 658 dtoaresult = 659 __hdtoa(fparg.dbl, xdigs, prec, 660 &expt, &signflag, &dtoaend); 661 if (dtoaresult == NULL) { 662 errno = ENOMEM; 663 goto error; 664 } 665 } 666 if (prec < 0) 667 prec = dtoaend - dtoaresult; 668 if (expt == INT_MAX) 669 ox[1] = '\0'; 670 free(convbuf); 671 cp = convbuf = __mbsconv(dtoaresult, -1); 672 if (cp == NULL) 673 goto error; 674 ndig = dtoaend - dtoaresult; 675 goto fp_common; 676 case 'e': 677 case 'E': 678 expchar = ch; 679 if (prec < 0) /* account for digit before decpt */ 680 prec = DEFPREC + 1; 681 else 682 prec++; 683 goto fp_begin; 684 case 'f': 685 case 'F': 686 expchar = '\0'; 687 goto fp_begin; 688 case 'g': 689 case 'G': 690 expchar = ch - ('g' - 'e'); 691 if (prec == 0) 692 prec = 1; 693 fp_begin: 694 if (prec < 0) 695 prec = DEFPREC; 696 if (dtoaresult) 697 __freedtoa(dtoaresult); 698 if (flags & LONGDBL) { 699 fparg.ldbl = GETARG(long double); 700 dtoaresult = 701 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 702 &expt, &signflag, &dtoaend); 703 if (dtoaresult == NULL) { 704 errno = ENOMEM; 705 goto error; 706 } 707 } else { 708 fparg.dbl = GETARG(double); 709 dtoaresult = 710 __dtoa(fparg.dbl, expchar ? 2 : 3, prec, 711 &expt, &signflag, &dtoaend); 712 if (dtoaresult == NULL) { 713 errno = ENOMEM; 714 goto error; 715 } 716 if (expt == 9999) 717 expt = INT_MAX; 718 } 719 free(convbuf); 720 cp = convbuf = __mbsconv(dtoaresult, -1); 721 if (cp == NULL) 722 goto error; 723 ndig = dtoaend - dtoaresult; 724 fp_common: 725 if (signflag) 726 sign = '-'; 727 if (expt == INT_MAX) { /* inf or nan */ 728 if (*cp == 'N') 729 cp = (ch >= 'a') ? L"nan" : L"NAN"; 730 else 731 cp = (ch >= 'a') ? L"inf" : L"INF"; 732 size = 3; 733 flags &= ~ZEROPAD; 734 break; 735 } 736 flags |= FPT; 737 if (ch == 'g' || ch == 'G') { 738 if (expt > -4 && expt <= prec) { 739 /* Make %[gG] smell like %[fF] */ 740 expchar = '\0'; 741 if (flags & ALT) 742 prec -= expt; 743 else 744 prec = ndig - expt; 745 if (prec < 0) 746 prec = 0; 747 } else { 748 /* 749 * Make %[gG] smell like %[eE], but 750 * trim trailing zeroes if no # flag. 751 */ 752 if (!(flags & ALT)) 753 prec = ndig; 754 } 755 } 756 if (expchar) { 757 expsize = exponent(expstr, expt - 1, expchar); 758 size = expsize + prec; 759 if (prec > 1 || flags & ALT) 760 ++size; 761 } else { 762 /* space for digits before decimal point */ 763 if (expt > 0) 764 size = expt; 765 else /* "0" */ 766 size = 1; 767 /* space for decimal pt and following digits */ 768 if (prec || flags & ALT) 769 size += prec + 1; 770 lead = expt; 771 } 772 break; 773 #endif /* FLOATING_POINT */ 774 #ifndef NO_PRINTF_PERCENT_N 775 case 'n': 776 if (flags & LLONGINT) 777 *GETARG(long long *) = ret; 778 else if (flags & LONGINT) 779 *GETARG(long *) = ret; 780 else if (flags & SHORTINT) 781 *GETARG(short *) = ret; 782 else if (flags & CHARINT) 783 *GETARG(signed char *) = ret; 784 else if (flags & PTRINT) 785 *GETARG(ptrdiff_t *) = ret; 786 else if (flags & SIZEINT) 787 *GETARG(ssize_t *) = ret; 788 else if (flags & MAXINT) 789 *GETARG(intmax_t *) = ret; 790 else 791 *GETARG(int *) = ret; 792 continue; /* no output */ 793 #endif /* NO_PRINTF_PERCENT_N */ 794 case 'O': 795 flags |= LONGINT; 796 /*FALLTHROUGH*/ 797 case 'o': 798 _umax = UARG(); 799 base = OCT; 800 goto nosign; 801 case 'p': 802 /* 803 * ``The argument shall be a pointer to void. The 804 * value of the pointer is converted to a sequence 805 * of printable characters, in an implementation- 806 * defined manner.'' 807 * -- ANSI X3J11 808 */ 809 _umax = (u_long)GETARG(void *); 810 base = HEX; 811 xdigs = xdigs_lower; 812 ox[1] = 'x'; 813 goto nosign; 814 case 'S': 815 flags |= LONGINT; 816 /*FALLTHROUGH*/ 817 case 's': 818 if (flags & LONGINT) { 819 if ((cp = GETARG(wchar_t *)) == NULL) 820 cp = L"(null)"; 821 } else { 822 char *mbsarg; 823 if ((mbsarg = GETARG(char *)) == NULL) 824 mbsarg = "(null)"; 825 free(convbuf); 826 convbuf = __mbsconv(mbsarg, prec); 827 if (convbuf == NULL) { 828 fp->_flags |= __SERR; 829 goto error; 830 } else 831 cp = convbuf; 832 } 833 if (prec >= 0) { 834 /* 835 * can't use wcslen; can only look for the 836 * NUL in the first `prec' characters, and 837 * wcslen() will go further. 838 */ 839 wchar_t *p = wmemchr(cp, 0, prec); 840 841 size = p ? (p - cp) : prec; 842 } else { 843 size_t len; 844 845 if ((len = wcslen(cp)) > INT_MAX) 846 goto overflow; 847 size = (int)len; 848 } 849 sign = '\0'; 850 break; 851 case 'U': 852 flags |= LONGINT; 853 /*FALLTHROUGH*/ 854 case 'u': 855 _umax = UARG(); 856 base = DEC; 857 goto nosign; 858 case 'X': 859 xdigs = xdigs_upper; 860 goto hex; 861 case 'x': 862 xdigs = xdigs_lower; 863 hex: _umax = UARG(); 864 base = HEX; 865 /* leading 0x/X only if non-zero */ 866 if (flags & ALT && _umax != 0) 867 ox[1] = ch; 868 869 /* unsigned conversions */ 870 nosign: sign = '\0'; 871 /* 872 * ``... diouXx conversions ... if a precision is 873 * specified, the 0 flag will be ignored.'' 874 * -- ANSI X3J11 875 */ 876 number: if ((dprec = prec) >= 0) 877 flags &= ~ZEROPAD; 878 879 /* 880 * ``The result of converting a zero value with an 881 * explicit precision of zero is no characters.'' 882 * -- ANSI X3J11 883 */ 884 cp = buf + BUF; 885 if (_umax != 0 || prec != 0) { 886 /* 887 * Unsigned mod is hard, and unsigned mod 888 * by a constant is easier than that by 889 * a variable; hence this switch. 890 */ 891 switch (base) { 892 case OCT: 893 do { 894 *--cp = to_char(_umax & 7); 895 _umax >>= 3; 896 } while (_umax); 897 /* handle octal leading 0 */ 898 if (flags & ALT && *cp != '0') 899 *--cp = '0'; 900 break; 901 902 case DEC: 903 /* many numbers are 1 digit */ 904 while (_umax >= 10) { 905 *--cp = to_char(_umax % 10); 906 _umax /= 10; 907 } 908 *--cp = to_char(_umax); 909 break; 910 911 case HEX: 912 do { 913 *--cp = xdigs[_umax & 15]; 914 _umax >>= 4; 915 } while (_umax); 916 break; 917 918 default: 919 cp = L"bug in vfwprintf: bad base"; 920 size = wcslen(cp); 921 goto skipsize; 922 } 923 } 924 size = buf + BUF - cp; 925 if (size > BUF) /* should never happen */ 926 abort(); 927 skipsize: 928 break; 929 default: /* "%?" prints ?, unless ? is NUL */ 930 if (ch == '\0') 931 goto done; 932 /* pretend it was %c with argument ch */ 933 cp = buf; 934 *cp = ch; 935 size = 1; 936 sign = '\0'; 937 break; 938 } 939 940 /* 941 * All reasonable formats wind up here. At this point, `cp' 942 * points to a string which (if not flags&LADJUST) should be 943 * padded out to `width' places. If flags&ZEROPAD, it should 944 * first be prefixed by any sign or other prefix; otherwise, 945 * it should be blank padded before the prefix is emitted. 946 * After any left-hand padding and prefixing, emit zeroes 947 * required by a decimal %[diouxX] precision, then print the 948 * string proper, then emit zeroes required by any leftover 949 * floating precision; finally, if LADJUST, pad with blanks. 950 * 951 * Compute actual size, so we know how much to pad. 952 * size excludes decimal prec; realsz includes it. 953 */ 954 realsz = dprec > size ? dprec : size; 955 if (sign) 956 realsz++; 957 if (ox[1]) 958 realsz+= 2; 959 960 /* right-adjusting blank padding */ 961 if ((flags & (LADJUST|ZEROPAD)) == 0) 962 PAD(width - realsz, blanks); 963 964 /* prefix */ 965 if (sign) 966 PRINT(&sign, 1); 967 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 968 ox[0] = '0'; 969 PRINT(ox, 2); 970 } 971 972 /* right-adjusting zero padding */ 973 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 974 PAD(width - realsz, zeroes); 975 976 /* leading zeroes from decimal precision */ 977 PAD(dprec - size, zeroes); 978 979 /* the string or number proper */ 980 #ifdef FLOATING_POINT 981 if ((flags & FPT) == 0) { 982 PRINT(cp, size); 983 } else { /* glue together f_p fragments */ 984 if (decimal_point == NULL) 985 decimal_point = nl_langinfo(RADIXCHAR); 986 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 987 if (expt <= 0) { 988 PRINT(zeroes, 1); 989 if (prec || flags & ALT) 990 PRINT(decimal_point, 1); 991 PAD(-expt, zeroes); 992 /* already handled initial 0's */ 993 prec += expt; 994 } else { 995 PRINTANDPAD(cp, convbuf + ndig, 996 lead, zeroes); 997 cp += lead; 998 if (prec || flags & ALT) 999 PRINT(decimal_point, 1); 1000 } 1001 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes); 1002 } else { /* %[eE] or sufficiently long %[gG] */ 1003 if (prec > 1 || flags & ALT) { 1004 buf[0] = *cp++; 1005 buf[1] = *decimal_point; 1006 PRINT(buf, 2); 1007 PRINT(cp, ndig-1); 1008 PAD(prec - ndig, zeroes); 1009 } else { /* XeYYY */ 1010 PRINT(cp, 1); 1011 } 1012 PRINT(expstr, expsize); 1013 } 1014 } 1015 #else 1016 PRINT(cp, size); 1017 #endif 1018 /* left-adjusting padding (always blank) */ 1019 if (flags & LADJUST) 1020 PAD(width - realsz, blanks); 1021 1022 /* finally, adjust ret */ 1023 if (width < realsz) 1024 width = realsz; 1025 if (width > INT_MAX - ret) 1026 goto overflow; 1027 ret += width; 1028 } 1029 done: 1030 error: 1031 va_end(orgap); 1032 if (__sferror(fp)) 1033 ret = -1; 1034 goto finish; 1035 1036 overflow: 1037 errno = ENOMEM; 1038 ret = -1; 1039 1040 finish: 1041 free(convbuf); 1042 #ifdef FLOATING_POINT 1043 if (dtoaresult) 1044 __freedtoa(dtoaresult); 1045 #endif 1046 if (argtable != NULL && argtable != statargtable) { 1047 munmap(argtable, argtablesiz); 1048 argtable = NULL; 1049 } 1050 return (ret); 1051 } 1052 1053 int 1054 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap) 1055 { 1056 int r; 1057 1058 FLOCKFILE(fp); 1059 r = __vfwprintf(fp, fmt0, ap); 1060 FUNLOCKFILE(fp); 1061 1062 return (r); 1063 } 1064 DEF_STRONG(vfwprintf); 1065 1066 /* 1067 * Type ids for argument type table. 1068 */ 1069 #define T_UNUSED 0 1070 #define T_SHORT 1 1071 #define T_U_SHORT 2 1072 #define TP_SHORT 3 1073 #define T_INT 4 1074 #define T_U_INT 5 1075 #define TP_INT 6 1076 #define T_LONG 7 1077 #define T_U_LONG 8 1078 #define TP_LONG 9 1079 #define T_LLONG 10 1080 #define T_U_LLONG 11 1081 #define TP_LLONG 12 1082 #define T_DOUBLE 13 1083 #define T_LONG_DOUBLE 14 1084 #define TP_CHAR 15 1085 #define TP_VOID 16 1086 #define T_PTRINT 17 1087 #define TP_PTRINT 18 1088 #define T_SIZEINT 19 1089 #define T_SSIZEINT 20 1090 #define TP_SSIZEINT 21 1091 #define T_MAXINT 22 1092 #define T_MAXUINT 23 1093 #define TP_MAXINT 24 1094 #define T_CHAR 25 1095 #define T_U_CHAR 26 1096 #define T_WINT 27 1097 #define TP_WCHAR 28 1098 1099 /* 1100 * Find all arguments when a positional parameter is encountered. Returns a 1101 * table, indexed by argument number, of pointers to each arguments. The 1102 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1103 * It will be replaced with a mmap-ed one if it overflows (malloc cannot be 1104 * used since we are attempting to make snprintf thread safe, and alloca is 1105 * problematic since we have nested functions..) 1106 */ 1107 static int 1108 __find_arguments(const wchar_t *fmt0, va_list ap, union arg **argtable, 1109 size_t *argtablesiz) 1110 { 1111 wchar_t *fmt; /* format string */ 1112 int ch; /* character from fmt */ 1113 int n, n2; /* handy integer (short term usage) */ 1114 wchar_t *cp; /* handy char pointer (short term usage) */ 1115 int flags; /* flags as above */ 1116 unsigned char *typetable; /* table of types */ 1117 unsigned char stattypetable[STATIC_ARG_TBL_SIZE]; 1118 int tablesize; /* current size of type table */ 1119 int tablemax; /* largest used index in table */ 1120 int nextarg; /* 1-based argument index */ 1121 int ret = 0; /* return value */ 1122 1123 /* 1124 * Add an argument type to the table, expanding if necessary. 1125 */ 1126 #define ADDTYPE(type) \ 1127 ((nextarg >= tablesize) ? \ 1128 __grow_type_table(&typetable, &tablesize) : 0, \ 1129 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1130 typetable[nextarg++] = type) 1131 1132 #define ADDSARG() \ 1133 ((flags&MAXINT) ? ADDTYPE(T_MAXINT) : \ 1134 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1135 ((flags&SIZEINT) ? ADDTYPE(T_SSIZEINT) : \ 1136 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1137 ((flags&LONGINT) ? ADDTYPE(T_LONG) : \ 1138 ((flags&SHORTINT) ? ADDTYPE(T_SHORT) : \ 1139 ((flags&CHARINT) ? ADDTYPE(T_CHAR) : ADDTYPE(T_INT)))))))) 1140 1141 #define ADDUARG() \ 1142 ((flags&MAXINT) ? ADDTYPE(T_MAXUINT) : \ 1143 ((flags&PTRINT) ? ADDTYPE(T_PTRINT) : \ 1144 ((flags&SIZEINT) ? ADDTYPE(T_SIZEINT) : \ 1145 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1146 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : \ 1147 ((flags&SHORTINT) ? ADDTYPE(T_U_SHORT) : \ 1148 ((flags&CHARINT) ? ADDTYPE(T_U_CHAR) : ADDTYPE(T_U_INT)))))))) 1149 1150 /* 1151 * Add * arguments to the type array. 1152 */ 1153 #define ADDASTER() \ 1154 n2 = 0; \ 1155 cp = fmt; \ 1156 while (is_digit(*cp)) { \ 1157 APPEND_DIGIT(n2, *cp); \ 1158 cp++; \ 1159 } \ 1160 if (*cp == '$') { \ 1161 int hold = nextarg; \ 1162 nextarg = n2; \ 1163 ADDTYPE(T_INT); \ 1164 nextarg = hold; \ 1165 fmt = ++cp; \ 1166 } else { \ 1167 ADDTYPE(T_INT); \ 1168 } 1169 fmt = (wchar_t *)fmt0; 1170 typetable = stattypetable; 1171 tablesize = STATIC_ARG_TBL_SIZE; 1172 tablemax = 0; 1173 nextarg = 1; 1174 memset(typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1175 1176 /* 1177 * Scan the format for conversions (`%' character). 1178 */ 1179 for (;;) { 1180 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1181 continue; 1182 if (ch == '\0') 1183 goto done; 1184 fmt++; /* skip over '%' */ 1185 1186 flags = 0; 1187 1188 rflag: ch = *fmt++; 1189 reswitch: switch (ch) { 1190 case ' ': 1191 case '#': 1192 case '\'': 1193 goto rflag; 1194 case '*': 1195 ADDASTER(); 1196 goto rflag; 1197 case '-': 1198 case '+': 1199 goto rflag; 1200 case '.': 1201 if ((ch = *fmt++) == '*') { 1202 ADDASTER(); 1203 goto rflag; 1204 } 1205 while (is_digit(ch)) { 1206 ch = *fmt++; 1207 } 1208 goto reswitch; 1209 case '0': 1210 goto rflag; 1211 case '1': case '2': case '3': case '4': 1212 case '5': case '6': case '7': case '8': case '9': 1213 n = 0; 1214 do { 1215 APPEND_DIGIT(n ,ch); 1216 ch = *fmt++; 1217 } while (is_digit(ch)); 1218 if (ch == '$') { 1219 nextarg = n; 1220 goto rflag; 1221 } 1222 goto reswitch; 1223 #ifdef FLOATING_POINT 1224 case 'L': 1225 flags |= LONGDBL; 1226 goto rflag; 1227 #endif 1228 case 'h': 1229 if (*fmt == 'h') { 1230 fmt++; 1231 flags |= CHARINT; 1232 } else { 1233 flags |= SHORTINT; 1234 } 1235 goto rflag; 1236 case 'l': 1237 if (*fmt == 'l') { 1238 fmt++; 1239 flags |= LLONGINT; 1240 } else { 1241 flags |= LONGINT; 1242 } 1243 goto rflag; 1244 case 'q': 1245 flags |= LLONGINT; 1246 goto rflag; 1247 case 't': 1248 flags |= PTRINT; 1249 goto rflag; 1250 case 'z': 1251 flags |= SIZEINT; 1252 goto rflag; 1253 case 'C': 1254 flags |= LONGINT; 1255 /*FALLTHROUGH*/ 1256 case 'c': 1257 if (flags & LONGINT) 1258 ADDTYPE(T_WINT); 1259 else 1260 ADDTYPE(T_INT); 1261 break; 1262 case 'D': 1263 flags |= LONGINT; 1264 /*FALLTHROUGH*/ 1265 case 'd': 1266 case 'i': 1267 ADDSARG(); 1268 break; 1269 #ifdef FLOATING_POINT 1270 case 'a': 1271 case 'A': 1272 case 'e': 1273 case 'E': 1274 case 'f': 1275 case 'F': 1276 case 'g': 1277 case 'G': 1278 if (flags & LONGDBL) 1279 ADDTYPE(T_LONG_DOUBLE); 1280 else 1281 ADDTYPE(T_DOUBLE); 1282 break; 1283 #endif /* FLOATING_POINT */ 1284 #ifndef NO_PRINTF_PERCENT_N 1285 case 'n': 1286 if (flags & LLONGINT) 1287 ADDTYPE(TP_LLONG); 1288 else if (flags & LONGINT) 1289 ADDTYPE(TP_LONG); 1290 else if (flags & SHORTINT) 1291 ADDTYPE(TP_SHORT); 1292 else if (flags & PTRINT) 1293 ADDTYPE(TP_PTRINT); 1294 else if (flags & SIZEINT) 1295 ADDTYPE(TP_SSIZEINT); 1296 else if (flags & MAXINT) 1297 ADDTYPE(TP_MAXINT); 1298 else 1299 ADDTYPE(TP_INT); 1300 continue; /* no output */ 1301 #endif /* NO_PRINTF_PERCENT_N */ 1302 case 'O': 1303 flags |= LONGINT; 1304 /*FALLTHROUGH*/ 1305 case 'o': 1306 ADDUARG(); 1307 break; 1308 case 'p': 1309 ADDTYPE(TP_VOID); 1310 break; 1311 case 'S': 1312 flags |= LONGINT; 1313 /*FALLTHROUGH*/ 1314 case 's': 1315 if (flags & LONGINT) 1316 ADDTYPE(TP_CHAR); 1317 else 1318 ADDTYPE(TP_WCHAR); 1319 break; 1320 case 'U': 1321 flags |= LONGINT; 1322 /*FALLTHROUGH*/ 1323 case 'u': 1324 case 'X': 1325 case 'x': 1326 ADDUARG(); 1327 break; 1328 default: /* "%?" prints ?, unless ? is NUL */ 1329 if (ch == '\0') 1330 goto done; 1331 break; 1332 } 1333 } 1334 done: 1335 /* 1336 * Build the argument table. 1337 */ 1338 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1339 *argtablesiz = sizeof(union arg) * (tablemax + 1); 1340 *argtable = mmap(NULL, *argtablesiz, 1341 PROT_WRITE|PROT_READ, MAP_ANON|MAP_PRIVATE, -1, 0); 1342 if (*argtable == MAP_FAILED) 1343 return (-1); 1344 } 1345 1346 #if 0 1347 /* XXX is this required? */ 1348 (*argtable)[0].intarg = 0; 1349 #endif 1350 for (n = 1; n <= tablemax; n++) { 1351 switch (typetable[n]) { 1352 case T_UNUSED: 1353 case T_CHAR: 1354 case T_U_CHAR: 1355 case T_SHORT: 1356 case T_U_SHORT: 1357 case T_INT: 1358 (*argtable)[n].intarg = va_arg(ap, int); 1359 break; 1360 case TP_SHORT: 1361 (*argtable)[n].pshortarg = va_arg(ap, short *); 1362 break; 1363 case T_U_INT: 1364 (*argtable)[n].uintarg = va_arg(ap, unsigned int); 1365 break; 1366 case TP_INT: 1367 (*argtable)[n].pintarg = va_arg(ap, int *); 1368 break; 1369 case T_LONG: 1370 (*argtable)[n].longarg = va_arg(ap, long); 1371 break; 1372 case T_U_LONG: 1373 (*argtable)[n].ulongarg = va_arg(ap, unsigned long); 1374 break; 1375 case TP_LONG: 1376 (*argtable)[n].plongarg = va_arg(ap, long *); 1377 break; 1378 case T_LLONG: 1379 (*argtable)[n].longlongarg = va_arg(ap, long long); 1380 break; 1381 case T_U_LLONG: 1382 (*argtable)[n].ulonglongarg = va_arg(ap, unsigned long long); 1383 break; 1384 case TP_LLONG: 1385 (*argtable)[n].plonglongarg = va_arg(ap, long long *); 1386 break; 1387 #ifdef FLOATING_POINT 1388 case T_DOUBLE: 1389 (*argtable)[n].doublearg = va_arg(ap, double); 1390 break; 1391 case T_LONG_DOUBLE: 1392 (*argtable)[n].longdoublearg = va_arg(ap, long double); 1393 break; 1394 #endif 1395 case TP_CHAR: 1396 (*argtable)[n].pchararg = va_arg(ap, char *); 1397 break; 1398 case TP_VOID: 1399 (*argtable)[n].pvoidarg = va_arg(ap, void *); 1400 break; 1401 case T_PTRINT: 1402 (*argtable)[n].ptrdiffarg = va_arg(ap, ptrdiff_t); 1403 break; 1404 case TP_PTRINT: 1405 (*argtable)[n].pptrdiffarg = va_arg(ap, ptrdiff_t *); 1406 break; 1407 case T_SIZEINT: 1408 (*argtable)[n].sizearg = va_arg(ap, size_t); 1409 break; 1410 case T_SSIZEINT: 1411 (*argtable)[n].ssizearg = va_arg(ap, ssize_t); 1412 break; 1413 case TP_SSIZEINT: 1414 (*argtable)[n].pssizearg = va_arg(ap, ssize_t *); 1415 break; 1416 case TP_MAXINT: 1417 (*argtable)[n].intmaxarg = va_arg(ap, intmax_t); 1418 break; 1419 case T_WINT: 1420 (*argtable)[n].wintarg = va_arg(ap, wint_t); 1421 break; 1422 case TP_WCHAR: 1423 (*argtable)[n].pwchararg = va_arg(ap, wchar_t *); 1424 break; 1425 } 1426 } 1427 goto finish; 1428 1429 overflow: 1430 errno = ENOMEM; 1431 ret = -1; 1432 1433 finish: 1434 if (typetable != NULL && typetable != stattypetable) { 1435 munmap(typetable, *argtablesiz); 1436 typetable = NULL; 1437 } 1438 return (ret); 1439 } 1440 1441 /* 1442 * Increase the size of the type table. 1443 */ 1444 static int 1445 __grow_type_table(unsigned char **typetable, int *tablesize) 1446 { 1447 unsigned char *oldtable = *typetable; 1448 int newsize = *tablesize * 2; 1449 1450 if (newsize < getpagesize()) 1451 newsize = getpagesize(); 1452 1453 if (*tablesize == STATIC_ARG_TBL_SIZE) { 1454 *typetable = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1455 MAP_ANON|MAP_PRIVATE, -1, 0); 1456 if (*typetable == MAP_FAILED) 1457 return (-1); 1458 bcopy(oldtable, *typetable, *tablesize); 1459 } else { 1460 unsigned char *new = mmap(NULL, newsize, PROT_WRITE|PROT_READ, 1461 MAP_ANON|MAP_PRIVATE, -1, 0); 1462 if (new == MAP_FAILED) 1463 return (-1); 1464 memmove(new, *typetable, *tablesize); 1465 munmap(*typetable, *tablesize); 1466 *typetable = new; 1467 } 1468 memset(*typetable + *tablesize, T_UNUSED, (newsize - *tablesize)); 1469 1470 *tablesize = newsize; 1471 return (0); 1472 } 1473 1474 1475 #ifdef FLOATING_POINT 1476 static int 1477 exponent(wchar_t *p0, int exp, int fmtch) 1478 { 1479 wchar_t *p, *t; 1480 wchar_t expbuf[MAXEXPDIG]; 1481 1482 p = p0; 1483 *p++ = fmtch; 1484 if (exp < 0) { 1485 exp = -exp; 1486 *p++ = '-'; 1487 } else 1488 *p++ = '+'; 1489 t = expbuf + MAXEXPDIG; 1490 if (exp > 9) { 1491 do { 1492 *--t = to_char(exp % 10); 1493 } while ((exp /= 10) > 9); 1494 *--t = to_char(exp); 1495 for (; t < expbuf + MAXEXPDIG; *p++ = *t++) 1496 /* nothing */; 1497 } else { 1498 /* 1499 * Exponents for decimal floating point conversions 1500 * (%[eEgG]) must be at least two characters long, 1501 * whereas exponents for hexadecimal conversions can 1502 * be only one character long. 1503 */ 1504 if (fmtch == 'e' || fmtch == 'E') 1505 *p++ = '0'; 1506 *p++ = to_char(exp); 1507 } 1508 return (p - p0); 1509 } 1510 #endif /* FLOATING_POINT */ 1511
