1 /* $NetBSD: vfwprintf.c,v 1.8 2006/05/10 21:53:15 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Chris Torek. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93"; 43 __FBSDID("$FreeBSD: src/lib/libc/stdio/vfwprintf.c,v 1.24 2005/04/16 22:36:51 das Exp $"); 44 #else 45 __RCSID("$NetBSD: vfwprintf.c,v 1.8 2006/05/10 21:53:15 mrg Exp $"); 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 /* 50 * Actual wprintf innards. 51 * 52 * Avoid making gratuitous changes to this source file; it should be kept 53 * as close as possible to vfprintf.c for ease of maintenance. 54 */ 55 56 #include "namespace.h" 57 #include <sys/types.h> 58 59 #include <assert.h> 60 #include <ctype.h> 61 #include <limits.h> 62 #include <locale.h> 63 #include <stdarg.h> 64 #include <stddef.h> 65 #include <stdint.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <errno.h> 70 #include <wchar.h> 71 #include <wctype.h> 72 73 #include "reentrant.h" 74 #include "local.h" 75 #include "extern.h" 76 #include "fvwrite.h" 77 78 union arg { 79 int intarg; 80 u_int uintarg; 81 long longarg; 82 u_long ulongarg; 83 quad_t longlongarg; 84 u_quad_t ulonglongarg; 85 ptrdiff_t ptrdiffarg; 86 size_t sizearg; 87 intmax_t intmaxarg; 88 uintmax_t uintmaxarg; 89 void *pvoidarg; 90 char *pchararg; 91 signed char *pschararg; 92 short *pshortarg; 93 int *pintarg; 94 long *plongarg; 95 quad_t *plonglongarg; 96 ptrdiff_t *pptrdiffarg; 97 size_t *psizearg; 98 intmax_t *pintmaxarg; 99 #ifndef NO_FLOATING_POINT 100 double doublearg; 101 long double longdoublearg; 102 #endif 103 wint_t wintarg; 104 wchar_t *pwchararg; 105 }; 106 107 /* 108 * Type ids for argument type table. 109 */ 110 enum typeid { 111 T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT, 112 T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG, 113 T_PTRDIFFT, TP_PTRDIFFT, T_SIZET, TP_SIZET, 114 T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR, 115 T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR 116 }; 117 118 static int __sbprintf(FILE *, const wchar_t *, va_list); 119 static wint_t __xfputwc(wchar_t, FILE *); 120 static wchar_t *__ujtoa(uintmax_t, wchar_t *, int, int, const char *, int, 121 char, const char *); 122 static wchar_t *__ultoa(u_long, wchar_t *, int, int, const char *, int, 123 char, const char *); 124 static wchar_t *__mbsconv(char *, int); 125 static void __find_arguments(const wchar_t *, va_list, union arg **); 126 static void __grow_type_table(int, enum typeid **, int *); 127 128 /* 129 * Helper function for `fprintf to unbuffered unix file': creates a 130 * temporary buffer. We only work on write-only files; this avoids 131 * worries about ungetc buffers and so forth. 132 */ 133 static int 134 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap) 135 { 136 int ret; 137 FILE fake; 138 unsigned char buf[BUFSIZ]; 139 140 /* copy the important variables */ 141 fake._flags = fp->_flags & ~__SNBF; 142 fake._file = fp->_file; 143 fake._cookie = fp->_cookie; 144 fake._write = fp->_write; 145 146 /* set up the buffer */ 147 fake._bf._base = fake._p = buf; 148 fake._bf._size = fake._w = sizeof(buf); 149 fake._lbfsize = 0; /* not actually used, but Just In Case */ 150 151 /* do the work, then copy any error status */ 152 ret = __vfwprintf_unlocked(&fake, fmt, ap); 153 if (ret >= 0 && fflush(&fake)) 154 ret = WEOF; 155 if (fake._flags & __SERR) 156 fp->_flags |= __SERR; 157 return (ret); 158 } 159 160 /* 161 * Like __fputwc, but handles fake string (__SSTR) files properly. 162 * File must already be locked. 163 */ 164 static wint_t 165 __xfputwc(wchar_t wc, FILE *fp) 166 { 167 static const mbstate_t initial; 168 mbstate_t mbs; 169 char buf[MB_LEN_MAX]; 170 struct __suio uio; 171 struct __siov iov; 172 size_t len; 173 174 if ((fp->_flags & __SSTR) == 0) 175 return (__fputwc_unlock(wc, fp)); 176 177 mbs = initial; 178 if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) { 179 fp->_flags |= __SERR; 180 return (WEOF); 181 } 182 uio.uio_iov = &iov; 183 uio.uio_resid = len; 184 uio.uio_iovcnt = 1; 185 iov.iov_base = buf; 186 iov.iov_len = len; 187 return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF); 188 } 189 190 /* 191 * Macros for converting digits to letters and vice versa 192 */ 193 #define to_digit(c) ((c) - '0') 194 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 195 #define to_char(n) (wchar_t)((n) + '0') 196 197 /* 198 * Convert an unsigned long to ASCII for printf purposes, returning 199 * a pointer to the first character of the string representation. 200 * Octal numbers can be forced to have a leading zero; hex numbers 201 * use the given digits. 202 */ 203 static wchar_t * 204 __ultoa(u_long val, wchar_t *endp, int base, int octzero, const char *xdigs, 205 int needgrp, char thousep, const char *grp) 206 { 207 wchar_t *cp = endp; 208 long sval; 209 int ndig; 210 211 /* 212 * Handle the three cases separately, in the hope of getting 213 * better/faster code. 214 */ 215 switch (base) { 216 case 10: 217 if (val < 10) { /* many numbers are 1 digit */ 218 *--cp = to_char(val); 219 return (cp); 220 } 221 ndig = 0; 222 /* 223 * On many machines, unsigned arithmetic is harder than 224 * signed arithmetic, so we do at most one unsigned mod and 225 * divide; this is sufficient to reduce the range of 226 * the incoming value to where signed arithmetic works. 227 */ 228 if (val > LONG_MAX) { 229 *--cp = to_char(val % 10); 230 ndig++; 231 sval = val / 10; 232 } else 233 sval = val; 234 do { 235 *--cp = to_char(sval % 10); 236 ndig++; 237 /* 238 * If (*grp == CHAR_MAX) then no more grouping 239 * should be performed. 240 */ 241 if (needgrp && ndig == *grp && *grp != CHAR_MAX 242 && sval > 9) { 243 *--cp = thousep; 244 ndig = 0; 245 /* 246 * If (*(grp+1) == '\0') then we have to 247 * use *grp character (last grouping rule) 248 * for all next cases 249 */ 250 if (*(grp+1) != '\0') 251 grp++; 252 } 253 sval /= 10; 254 } while (sval != 0); 255 break; 256 257 case 8: 258 do { 259 *--cp = to_char(val & 7); 260 val >>= 3; 261 } while (val); 262 if (octzero && *cp != '0') 263 *--cp = '0'; 264 break; 265 266 case 16: 267 do { 268 *--cp = xdigs[(size_t)val & 15]; 269 val >>= 4; 270 } while (val); 271 break; 272 273 default: /* oops */ 274 abort(); 275 } 276 return (cp); 277 } 278 279 /* Identical to __ultoa, but for intmax_t. */ 280 static wchar_t * 281 __ujtoa(uintmax_t val, wchar_t *endp, int base, int octzero, 282 const char *xdigs, int needgrp, char thousep, const char *grp) 283 { 284 wchar_t *cp = endp; 285 intmax_t sval; 286 int ndig; 287 288 /* quick test for small values; __ultoa is typically much faster */ 289 /* (perhaps instead we should run until small, then call __ultoa?) */ 290 if (val <= ULONG_MAX) 291 return (__ultoa((u_long)val, endp, base, octzero, xdigs, 292 needgrp, thousep, grp)); 293 switch (base) { 294 case 10: 295 if (val < 10) { 296 *--cp = to_char(val % 10); 297 return (cp); 298 } 299 ndig = 0; 300 if (val > INTMAX_MAX) { 301 *--cp = to_char(val % 10); 302 ndig++; 303 sval = val / 10; 304 } else 305 sval = val; 306 do { 307 *--cp = to_char(sval % 10); 308 ndig++; 309 /* 310 * If (*grp == CHAR_MAX) then no more grouping 311 * should be performed. 312 */ 313 if (needgrp && *grp != CHAR_MAX && ndig == *grp 314 && sval > 9) { 315 *--cp = thousep; 316 ndig = 0; 317 /* 318 * If (*(grp+1) == '\0') then we have to 319 * use *grp character (last grouping rule) 320 * for all next cases 321 */ 322 if (*(grp+1) != '\0') 323 grp++; 324 } 325 sval /= 10; 326 } while (sval != 0); 327 break; 328 329 case 8: 330 do { 331 *--cp = to_char(val & 7); 332 val >>= 3; 333 } while (val); 334 if (octzero && *cp != '0') 335 *--cp = '0'; 336 break; 337 338 case 16: 339 do { 340 *--cp = xdigs[(size_t)val & 15]; 341 val >>= 4; 342 } while (val); 343 break; 344 345 default: 346 abort(); 347 } 348 return (cp); 349 } 350 351 /* 352 * Convert a multibyte character string argument for the %s format to a wide 353 * string representation. ``prec'' specifies the maximum number of bytes 354 * to output. If ``prec'' is greater than or equal to zero, we can't assume 355 * that the multibyte char. string ends in a null character. 356 */ 357 static wchar_t * 358 __mbsconv(char *mbsarg, int prec) 359 { 360 static const mbstate_t initial; 361 mbstate_t mbs; 362 wchar_t *convbuf, *wcp; 363 const char *p; 364 size_t insize, nchars, nconv; 365 366 if (mbsarg == NULL) 367 return (NULL); 368 369 /* 370 * Supplied argument is a multibyte string; convert it to wide 371 * characters first. 372 */ 373 if (prec >= 0) { 374 /* 375 * String is not guaranteed to be NUL-terminated. Find the 376 * number of characters to print. 377 */ 378 p = mbsarg; 379 insize = nchars = nconv = 0; 380 mbs = initial; 381 while (nchars != (size_t)prec) { 382 nconv = mbrlen(p, MB_CUR_MAX, &mbs); 383 if (nconv == 0 || nconv == (size_t)-1 || 384 nconv == (size_t)-2) 385 break; 386 p += nconv; 387 nchars++; 388 insize += nconv; 389 } 390 if (nconv == (size_t)-1 || nconv == (size_t)-2) 391 return (NULL); 392 } else 393 insize = strlen(mbsarg); 394 395 /* 396 * Allocate buffer for the result and perform the conversion, 397 * converting at most `size' bytes of the input multibyte string to 398 * wide characters for printing. 399 */ 400 convbuf = malloc((insize + 1) * sizeof(*convbuf)); 401 if (convbuf == NULL) 402 return (NULL); 403 wcp = convbuf; 404 p = mbsarg; 405 mbs = initial; 406 nconv = 0; 407 while (insize != 0) { 408 nconv = mbrtowc(wcp, p, insize, &mbs); 409 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2) 410 break; 411 wcp++; 412 p += nconv; 413 insize -= nconv; 414 } 415 if (nconv == (size_t)-1 || nconv == (size_t)-2) { 416 free(convbuf); 417 return (NULL); 418 } 419 *wcp = L'\0'; 420 421 return (convbuf); 422 } 423 424 /* 425 * MT-safe version 426 */ 427 int 428 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap) 429 { 430 int ret; 431 432 FLOCKFILE(fp); 433 ret = __vfwprintf_unlocked(fp, fmt0, ap); 434 FUNLOCKFILE(fp); 435 return (ret); 436 } 437 438 #ifndef NO_FLOATING_POINT 439 440 #include <float.h> 441 #include <math.h> 442 #include "floatio.h" 443 444 #define DEFPREC 6 445 446 #ifndef WIDE_DOUBLE 447 static int exponent(wchar_t *, int, wchar_t); 448 static char *cvt(double, int, int, char *, int *, int, int *); 449 #endif 450 451 #endif /* !NO_FLOATING_POINT */ 452 453 /* 454 * The size of the buffer we use as scratch space for integer 455 * conversions, among other things. Technically, we would need the 456 * most space for base 10 conversions with thousands' grouping 457 * characters between each pair of digits. 100 bytes is a 458 * conservative overestimate even for a 128-bit uintmax_t. 459 */ 460 #define BUF 100 461 462 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 463 464 /* 465 * Flags used during conversion. 466 */ 467 #define ALT 0x001 /* alternate form */ 468 #define LADJUST 0x004 /* left adjustment */ 469 #define LONGDBL 0x008 /* long double */ 470 #define LONGINT 0x010 /* long integer */ 471 #define LLONGINT 0x020 /* quad_t integer */ 472 #define SHORTINT 0x040 /* short integer */ 473 #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */ 474 #define FPT 0x100 /* Floating point number */ 475 #define GROUPING 0x200 /* use grouping ("'" flag) */ 476 /* C99 additional size modifiers: */ 477 #define SIZET 0x400 /* size_t */ 478 #define PTRDIFFT 0x800 /* ptrdiff_t */ 479 #define INTMAXT 0x1000 /* intmax_t */ 480 #define CHARINT 0x2000 /* print char using int format */ 481 482 /* 483 * Non-MT-safe version 484 */ 485 int 486 __vfwprintf_unlocked(FILE *fp, const wchar_t *fmt0, va_list ap) 487 { 488 wchar_t *fmt; /* format string */ 489 wchar_t ch; /* character from fmt */ 490 int n, n2, n3; /* handy integer (short term usage) */ 491 wchar_t *cp; /* handy char pointer (short term usage) */ 492 int flags; /* flags as above */ 493 int ret; /* return value accumulator */ 494 int width; /* width from format (%8d), or 0 */ 495 int prec; /* precision from format; <0 for N/A */ 496 wchar_t sign; /* sign prefix (' ', '+', '-', or \0) */ 497 char thousands_sep; /* locale specific thousands separator */ 498 const char *grouping; /* locale specific numeric grouping rules */ 499 #ifndef NO_FLOATING_POINT 500 /* 501 * We can decompose the printed representation of floating 502 * point numbers into several parts, some of which may be empty: 503 * 504 * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ 505 * A B ---C--- D E F 506 * 507 * A: 'sign' holds this value if present; '\0' otherwise 508 * B: ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal 509 * C: cp points to the string MMMNNN. Leading and trailing 510 * zeros are not in the string and must be added. 511 * D: expchar holds this character; '\0' if no exponent, e.g. %f 512 * F: at least two digits for decimal, at least one digit for hex 513 */ 514 char *decimal_point; /* locale specific decimal point */ 515 #ifdef WIDE_DOUBLE 516 int signflag; /* true if float is negative */ 517 union { /* floating point arguments %[aAeEfFgG] */ 518 double dbl; 519 long double ldbl; 520 } fparg; 521 char *dtoaend; /* pointer to end of converted digits */ 522 #else 523 double _double; /* double precision arguments %[eEfgG] */ 524 char softsign; /* temporary negative sign for floats */ 525 #endif 526 char *dtoaresult = NULL;/* buffer allocated by dtoa */ 527 int expt; /* integer value of exponent */ 528 char expchar; /* exponent character: [eEpP\0] */ 529 int expsize; /* character count for expstr */ 530 int lead; /* sig figs before decimal or group sep */ 531 int ndig; /* actual number of digits returned by dtoa */ 532 wchar_t expstr[MAXEXPDIG+2]; /* buffer for exponent string: e+ZZZ */ 533 int nseps; /* number of group separators with ' */ 534 int nrepeats; /* number of repeats of the last group */ 535 #endif 536 u_long ulval; /* integer arguments %[diouxX] */ 537 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */ 538 int base; /* base for [diouxX] conversion */ 539 int dprec; /* a copy of prec if [diouxX], 0 otherwise */ 540 int realsz; /* field size expanded by dprec, sign, etc */ 541 int size; /* size of converted field or string */ 542 int prsize; /* max size of printed field */ 543 const char *xdigs; /* digits for [xX] conversion */ 544 wchar_t buf[BUF]; /* buffer with space for digits of uintmax_t */ 545 wchar_t ox[2]; /* space for 0x hex-prefix */ 546 union arg *argtable; /* args, built due to positional arg */ 547 union arg statargtable [STATIC_ARG_TBL_SIZE]; 548 int nextarg; /* 1-based argument index */ 549 va_list orgap; /* original argument pointer */ 550 wchar_t *convbuf; /* multibyte to wide conversion result */ 551 552 /* 553 * Choose PADSIZE to trade efficiency vs. size. If larger printf 554 * fields occur frequently, increase PADSIZE and make the initialisers 555 * below longer. 556 */ 557 #define PADSIZE 16 /* pad chunk size */ 558 static wchar_t blanks[PADSIZE] = 559 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 560 static wchar_t zeroes[PADSIZE] = 561 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 562 563 static const char xdigs_lower[16] = "0123456789abcdef"; 564 static const char xdigs_upper[16] = "0123456789ABCDEF"; 565 566 /* 567 * BEWARE, these `goto error' on error, PRINT uses `n2' and 568 * PAD uses `n'. 569 */ 570 #define PRINT(ptr, len) do { \ 571 for (n3 = 0; n3 < (len); n3++) \ 572 __xfputwc((ptr)[n3], fp); \ 573 } while (/*CONSTCOND*/0) 574 #define PAD(howmany, with) do { \ 575 if ((n = (howmany)) > 0) { \ 576 while (n > PADSIZE) { \ 577 PRINT(with, PADSIZE); \ 578 n -= PADSIZE; \ 579 } \ 580 PRINT(with, n); \ 581 } \ 582 } while (/*CONSTCOND*/0) 583 #define PRINTANDPAD(p, ep, len, with) do { \ 584 n2 = (ep) - (p); \ 585 if (n2 > (len)) \ 586 n2 = (len); \ 587 if (n2 > 0) \ 588 PRINT((p), n2); \ 589 PAD((len) - (n2 > 0 ? n2 : 0), (with)); \ 590 } while(/*CONSTCOND*/0) 591 592 /* 593 * Get the argument indexed by nextarg. If the argument table is 594 * built, use it to get the argument. If its not, get the next 595 * argument (and arguments must be gotten sequentially). 596 */ 597 #define GETARG(type) \ 598 ((/*CONSTCOND*/argtable != NULL) ? *((type*)(void*)(&argtable[nextarg++])) : \ 599 (nextarg++, va_arg(ap, type))) 600 601 /* 602 * To extend shorts properly, we need both signed and unsigned 603 * argument extraction methods. 604 */ 605 #define SARG() \ 606 (flags&LONGINT ? GETARG(long) : \ 607 flags&SHORTINT ? (long)(short)GETARG(int) : \ 608 flags&CHARINT ? (long)(signed char)GETARG(int) : \ 609 (long)GETARG(int)) 610 #define UARG() \ 611 (flags&LONGINT ? GETARG(u_long) : \ 612 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \ 613 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \ 614 (u_long)GETARG(u_int)) 615 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT) 616 #define SJARG() \ 617 (flags&INTMAXT ? GETARG(intmax_t) : \ 618 flags&SIZET ? (intmax_t)GETARG(size_t) : \ 619 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \ 620 (intmax_t)GETARG(quad_t)) 621 #define UJARG() \ 622 (flags&INTMAXT ? GETARG(uintmax_t) : \ 623 flags&SIZET ? (uintmax_t)GETARG(size_t) : \ 624 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \ 625 (uintmax_t)GETARG(u_quad_t)) 626 627 /* 628 * Get * arguments, including the form *nn$. Preserve the nextarg 629 * that the argument can be gotten once the type is determined. 630 */ 631 #define GETASTER(val) \ 632 n2 = 0; \ 633 cp = fmt; \ 634 while (is_digit(*cp)) { \ 635 n2 = 10 * n2 + to_digit(*cp); \ 636 cp++; \ 637 } \ 638 if (*cp == '$') { \ 639 int hold = nextarg; \ 640 if (argtable == NULL) { \ 641 argtable = statargtable; \ 642 __find_arguments (fmt0, orgap, &argtable); \ 643 } \ 644 nextarg = n2; \ 645 val = GETARG (int); \ 646 nextarg = hold; \ 647 fmt = ++cp; \ 648 } else { \ 649 val = GETARG (int); \ 650 } 651 652 ndig = -1; /* XXX gcc */ 653 654 thousands_sep = '\0'; 655 grouping = NULL; 656 #ifndef NO_FLOATING_POINT 657 decimal_point = localeconv()->decimal_point; 658 expsize = 0; /* XXXGCC -Wuninitialized [sh3,m68000] */ 659 #endif 660 convbuf = NULL; 661 /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */ 662 if (cantwrite(fp)) { 663 errno = EBADF; 664 return (WEOF); 665 } 666 667 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 668 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 669 fp->_file >= 0) 670 return (__sbprintf(fp, fmt0, ap)); 671 672 fmt = (wchar_t *)__UNCONST(fmt0); 673 argtable = NULL; 674 nextarg = 1; 675 va_copy(orgap, ap); 676 ret = 0; 677 678 /* 679 * Scan the format for conversions (`%' character). 680 */ 681 for (;;) { 682 const wchar_t *result; 683 684 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 685 /* void */; 686 if ((n = fmt - cp) != 0) { 687 if ((unsigned)ret + n > INT_MAX) { 688 ret = EOF; 689 goto error; 690 } 691 PRINT(cp, n); 692 ret += n; 693 } 694 if (ch == '\0') 695 goto done; 696 fmt++; /* skip over '%' */ 697 698 flags = 0; 699 dprec = 0; 700 width = 0; 701 prec = -1; 702 sign = '\0'; 703 ox[1] = '\0'; 704 expchar = '\0'; 705 lead = 0; 706 nseps = nrepeats = 0; 707 ulval = 0; 708 ujval = 0; 709 xdigs = NULL; 710 711 rflag: ch = *fmt++; 712 reswitch: switch (ch) { 713 case ' ': 714 /*- 715 * ``If the space and + flags both appear, the space 716 * flag will be ignored.'' 717 * -- ANSI X3J11 718 */ 719 if (!sign) 720 sign = ' '; 721 goto rflag; 722 case '#': 723 flags |= ALT; 724 goto rflag; 725 case '*': 726 /*- 727 * ``A negative field width argument is taken as a 728 * - flag followed by a positive field width.'' 729 * -- ANSI X3J11 730 * They don't exclude field widths read from args. 731 */ 732 GETASTER (width); 733 if (width >= 0) 734 goto rflag; 735 width = -width; 736 /* FALLTHROUGH */ 737 case '-': 738 flags |= LADJUST; 739 goto rflag; 740 case '+': 741 sign = '+'; 742 goto rflag; 743 case '\'': 744 flags |= GROUPING; 745 thousands_sep = *(localeconv()->thousands_sep); 746 grouping = localeconv()->grouping; 747 goto rflag; 748 case '.': 749 if ((ch = *fmt++) == '*') { 750 GETASTER (prec); 751 goto rflag; 752 } 753 prec = 0; 754 while (is_digit(ch)) { 755 prec = 10 * prec + to_digit(ch); 756 ch = *fmt++; 757 } 758 goto reswitch; 759 case '0': 760 /*- 761 * ``Note that 0 is taken as a flag, not as the 762 * beginning of a field width.'' 763 * -- ANSI X3J11 764 */ 765 flags |= ZEROPAD; 766 goto rflag; 767 case '1': case '2': case '3': case '4': 768 case '5': case '6': case '7': case '8': case '9': 769 n = 0; 770 do { 771 n = 10 * n + to_digit(ch); 772 ch = *fmt++; 773 } while (is_digit(ch)); 774 if (ch == '$') { 775 nextarg = n; 776 if (argtable == NULL) { 777 argtable = statargtable; 778 __find_arguments (fmt0, orgap, 779 &argtable); 780 } 781 goto rflag; 782 } 783 width = n; 784 goto reswitch; 785 #ifndef NO_FLOATING_POINT 786 case 'L': 787 flags |= LONGDBL; 788 goto rflag; 789 #endif 790 case 'h': 791 if (flags & SHORTINT) { 792 flags &= ~SHORTINT; 793 flags |= CHARINT; 794 } else 795 flags |= SHORTINT; 796 goto rflag; 797 case 'j': 798 flags |= INTMAXT; 799 goto rflag; 800 case 'l': 801 if (flags & LONGINT) { 802 flags &= ~LONGINT; 803 flags |= LLONGINT; 804 } else 805 flags |= LONGINT; 806 goto rflag; 807 case 'q': 808 flags |= LLONGINT; /* not necessarily */ 809 goto rflag; 810 case 't': 811 flags |= PTRDIFFT; 812 goto rflag; 813 case 'z': 814 flags |= SIZET; 815 goto rflag; 816 case 'C': 817 flags |= LONGINT; 818 /*FALLTHROUGH*/ 819 case 'c': 820 if (flags & LONGINT) 821 *buf = (wchar_t)GETARG(wint_t); 822 else 823 *buf = (wchar_t)btowc(GETARG(int)); 824 result = buf; 825 size = 1; 826 sign = '\0'; 827 break; 828 case 'D': 829 flags |= LONGINT; 830 /*FALLTHROUGH*/ 831 case 'd': 832 case 'i': 833 if (flags & INTMAX_SIZE) { 834 ujval = SJARG(); 835 if ((intmax_t)ujval < 0) { 836 ujval = -ujval; 837 sign = '-'; 838 } 839 } else { 840 ulval = SARG(); 841 if ((long)ulval < 0) { 842 ulval = -ulval; 843 sign = '-'; 844 } 845 } 846 base = 10; 847 goto number; 848 #ifndef NO_FLOATING_POINT 849 #ifdef WIDE_DOUBLE 850 case 'a': 851 case 'A': 852 if (ch == 'a') { 853 ox[1] = 'x'; 854 xdigs = xdigs_lower; 855 expchar = 'p'; 856 } else { 857 ox[1] = 'X'; 858 xdigs = xdigs_upper; 859 expchar = 'P'; 860 } 861 if (prec >= 0) 862 prec++; 863 if (flags & LONGDBL) { 864 fparg.ldbl = GETARG(long double); 865 dtoaresult = 866 __hldtoa(fparg.ldbl, xdigs, prec, 867 &expt, &signflag, &dtoaend); 868 } else { 869 fparg.dbl = GETARG(double); 870 dtoaresult = 871 __hdtoa(fparg.dbl, xdigs, prec, 872 &expt, &signflag, &dtoaend); 873 } 874 875 if (prec < 0) 876 prec = dtoaend - dtoaresult; 877 if (expt == INT_MAX) 878 ox[1] = '\0'; 879 if (convbuf != NULL) 880 free(convbuf); 881 ndig = dtoaend - dtoaresult; 882 result = convbuf = __mbsconv(dtoaresult, -1); 883 __freedtoa(dtoaresult); 884 goto fp_common; 885 case 'e': 886 case 'E': 887 expchar = ch; 888 if (prec < 0) /* account for digit before decpt */ 889 prec = DEFPREC + 1; 890 else 891 prec++; 892 goto fp_begin; 893 case 'f': 894 case 'F': 895 expchar = '\0'; 896 goto fp_begin; 897 case 'g': 898 case 'G': 899 expchar = ch - ('g' - 'e'); 900 if (prec == 0) 901 prec = 1; 902 fp_begin: 903 if (prec < 0) 904 prec = DEFPREC; 905 if (convbuf != NULL) 906 free(convbuf); 907 if (flags & LONGDBL) { 908 fparg.ldbl = GETARG(long double); 909 dtoaresult = 910 __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec, 911 &expt, &signflag, &dtoaend); 912 } else { 913 fparg.dbl = GETARG(double); 914 dtoaresult = 915 dtoa(fparg.dbl, expchar ? 2 : 3, prec, 916 &expt, &signflag, &dtoaend); 917 if (expt == 9999) 918 expt = INT_MAX; 919 } 920 ndig = dtoaend - dtoaresult; 921 result = convbuf = __mbsconv(dtoaresult, -1); 922 __freedtoa(dtoaresult); 923 fp_common: 924 if (signflag) 925 sign = '-'; 926 if (expt == INT_MAX) { /* inf or nan */ 927 if (*result == 'N') { 928 result = (ch >= 'a') ? L"nan" : L"NAN"; 929 sign = '\0'; 930 } else 931 result = (ch >= 'a') ? L"inf" : L"INF"; 932 size = 3; 933 break; 934 } 935 #else 936 case 'e': 937 case 'E': 938 case 'f': 939 case 'F': 940 case 'g': 941 case 'G': 942 if (prec == -1) { 943 prec = DEFPREC; 944 } else if ((ch == 'g' || ch == 'G') && prec == 0) { 945 prec = 1; 946 } 947 948 if (flags & LONGDBL) { 949 _double = (double) GETARG(long double); 950 } else { 951 _double = GETARG(double); 952 } 953 954 /* do this before tricky precision changes */ 955 if (isinf(_double)) { 956 if (_double < 0) 957 sign = '-'; 958 if (ch == 'E' || ch == 'F' || ch == 'G') 959 result = L"INF"; 960 else 961 result = L"inf"; 962 size = 3; 963 break; 964 } 965 if (isnan(_double)) { 966 if (ch == 'E' || ch == 'F' || ch == 'G') 967 result = L"NAN"; 968 else 969 result = L"nan"; 970 size = 3; 971 break; 972 } 973 974 flags |= FPT; 975 dtoaresult = cvt(_double, prec, flags, &softsign, 976 &expt, ch, &ndig); 977 result = convbuf = __mbsconv(dtoaresult, -1); 978 __freedtoa(dtoaresult); 979 if (softsign) 980 sign = '-'; 981 #endif 982 flags |= FPT; 983 if (ch == 'g' || ch == 'G') { 984 if (expt > -4 && expt <= prec) { 985 /* Make %[gG] smell like %[fF] */ 986 expchar = '\0'; 987 if (flags & ALT) 988 prec -= expt; 989 else 990 prec = ndig - expt; 991 if (prec < 0) 992 prec = 0; 993 } else { 994 /* 995 * Make %[gG] smell like %[eE], but 996 * trim trailing zeroes if no # flag. 997 */ 998 if (!(flags & ALT)) 999 prec = ndig; 1000 } 1001 } 1002 if (expchar) { 1003 expsize = exponent(expstr, expt - 1, expchar); 1004 size = expsize + prec; 1005 if (prec > 1 || flags & ALT) 1006 ++size; 1007 } else { 1008 /* space for digits before decimal point */ 1009 if (expt > 0) 1010 size = expt; 1011 else /* "0" */ 1012 size = 1; 1013 /* space for decimal pt and following digits */ 1014 if (prec || flags & ALT) 1015 size += prec + 1; 1016 if (grouping && expt > 0) { 1017 /* space for thousands' grouping */ 1018 nseps = nrepeats = 0; 1019 lead = expt; 1020 while (*grouping != CHAR_MAX) { 1021 if (lead <= *grouping) 1022 break; 1023 lead -= *grouping; 1024 if (*(grouping+1)) { 1025 nseps++; 1026 grouping++; 1027 } else 1028 nrepeats++; 1029 } 1030 size += nseps + nrepeats; 1031 } else 1032 lead = expt; 1033 } 1034 break; 1035 #endif /* !NO_FLOATING_POINT */ 1036 case 'n': 1037 /* 1038 * Assignment-like behavior is specified if the 1039 * value overflows or is otherwise unrepresentable. 1040 * C99 says to use `signed char' for %hhn conversions. 1041 */ 1042 if (flags & LLONGINT) 1043 *GETARG(quad_t *) = ret; 1044 else if (flags & SIZET) 1045 *GETARG(ssize_t *) = (ssize_t)ret; 1046 else if (flags & PTRDIFFT) 1047 *GETARG(ptrdiff_t *) = ret; 1048 else if (flags & INTMAXT) 1049 *GETARG(intmax_t *) = ret; 1050 else if (flags & LONGINT) 1051 *GETARG(long *) = ret; 1052 else if (flags & SHORTINT) 1053 *GETARG(short *) = ret; 1054 else if (flags & CHARINT) 1055 *GETARG(signed char *) = ret; 1056 else 1057 *GETARG(int *) = ret; 1058 continue; /* no output */ 1059 case 'O': 1060 flags |= LONGINT; 1061 /*FALLTHROUGH*/ 1062 case 'o': 1063 if (flags & INTMAX_SIZE) 1064 ujval = UJARG(); 1065 else 1066 ulval = UARG(); 1067 base = 8; 1068 goto nosign; 1069 case 'p': 1070 /*- 1071 * ``The argument shall be a pointer to void. The 1072 * value of the pointer is converted to a sequence 1073 * of printable characters, in an implementation- 1074 * defined manner.'' 1075 * -- ANSI X3J11 1076 */ 1077 ujval = (uintmax_t)(uintptr_t)GETARG(void *); 1078 base = 16; 1079 xdigs = xdigs_lower; 1080 flags = flags | INTMAXT; 1081 ox[1] = 'x'; 1082 goto nosign; 1083 case 'S': 1084 flags |= LONGINT; 1085 /*FALLTHROUGH*/ 1086 case 's': 1087 if (flags & LONGINT) { 1088 if ((result = GETARG(wchar_t *)) == NULL) 1089 result = L"(null)"; 1090 } else { 1091 char *mbp; 1092 1093 if (convbuf != NULL) 1094 free(convbuf); 1095 if ((mbp = GETARG(char *)) == NULL) 1096 result = L"(null)"; 1097 else { 1098 convbuf = __mbsconv(mbp, prec); 1099 if (convbuf == NULL) { 1100 fp->_flags |= __SERR; 1101 goto error; 1102 } 1103 result = convbuf; 1104 } 1105 } 1106 1107 if (prec >= 0) { 1108 /* 1109 * can't use wcslen; can only look for the 1110 * NUL in the first `prec' characters, and 1111 * wcslen() will go further. 1112 */ 1113 wchar_t *p = wmemchr(result, 0, (size_t)prec); 1114 1115 if (p != NULL) { 1116 size = p - result; 1117 if (size > prec) 1118 size = prec; 1119 } else 1120 size = prec; 1121 } else 1122 size = wcslen(result); 1123 sign = '\0'; 1124 break; 1125 case 'U': 1126 flags |= LONGINT; 1127 /*FALLTHROUGH*/ 1128 case 'u': 1129 if (flags & INTMAX_SIZE) 1130 ujval = UJARG(); 1131 else 1132 ulval = UARG(); 1133 base = 10; 1134 goto nosign; 1135 case 'X': 1136 xdigs = xdigs_upper; 1137 goto hex; 1138 case 'x': 1139 xdigs = xdigs_lower; 1140 hex: 1141 if (flags & INTMAX_SIZE) 1142 ujval = UJARG(); 1143 else 1144 ulval = UARG(); 1145 base = 16; 1146 /* leading 0x/X only if non-zero */ 1147 if (flags & ALT && 1148 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0)) 1149 ox[1] = ch; 1150 1151 flags &= ~GROUPING; 1152 /* unsigned conversions */ 1153 nosign: sign = '\0'; 1154 /*- 1155 * ``... diouXx conversions ... if a precision is 1156 * specified, the 0 flag will be ignored.'' 1157 * -- ANSI X3J11 1158 */ 1159 number: if ((dprec = prec) >= 0) 1160 flags &= ~ZEROPAD; 1161 1162 /*- 1163 * ``The result of converting a zero value with an 1164 * explicit precision of zero is no characters.'' 1165 * -- ANSI X3J11 1166 * 1167 * ``The C Standard is clear enough as is. The call 1168 * printf("%#.0o", 0) should print 0.'' 1169 * -- Defect Report #151 1170 */ 1171 result = cp = buf + BUF; 1172 if (flags & INTMAX_SIZE) { 1173 if (ujval != 0 || prec != 0 || 1174 (flags & ALT && base == 8)) 1175 result = __ujtoa(ujval, cp, base, 1176 flags & ALT, xdigs, 1177 flags & GROUPING, thousands_sep, 1178 grouping); 1179 } else { 1180 if (ulval != 0 || prec != 0 || 1181 (flags & ALT && base == 8)) 1182 result = __ultoa(ulval, cp, base, 1183 flags & ALT, xdigs, 1184 flags & GROUPING, thousands_sep, 1185 grouping); 1186 } 1187 size = buf + BUF - result; 1188 if (size > BUF) /* should never happen */ 1189 abort(); 1190 break; 1191 default: /* "%?" prints ?, unless ? is NUL */ 1192 if (ch == '\0') 1193 goto done; 1194 /* pretend it was %c with argument ch */ 1195 *buf = ch; 1196 result = buf; 1197 size = 1; 1198 sign = '\0'; 1199 break; 1200 } 1201 1202 /* 1203 * All reasonable formats wind up here. At this point, `result' 1204 * points to a string which (if not flags&LADJUST) should be 1205 * padded out to `width' places. If flags&ZEROPAD, it should 1206 * first be prefixed by any sign or other prefix; otherwise, 1207 * it should be blank padded before the prefix is emitted. 1208 * After any left-hand padding and prefixing, emit zeroes 1209 * required by a decimal [diouxX] precision, then print the 1210 * string proper, then emit zeroes required by any leftover 1211 * floating precision; finally, if LADJUST, pad with blanks. 1212 * 1213 * Compute actual size, so we know how much to pad. 1214 * size excludes decimal prec; realsz includes it. 1215 */ 1216 realsz = dprec > size ? dprec : size; 1217 if (sign) 1218 realsz++; 1219 if (ox[1]) 1220 realsz += 2; 1221 1222 prsize = width > realsz ? width : realsz; 1223 if ((unsigned)ret + prsize > INT_MAX) { 1224 ret = EOF; 1225 goto error; 1226 } 1227 1228 /* right-adjusting blank padding */ 1229 if ((flags & (LADJUST|ZEROPAD)) == 0) 1230 PAD(width - realsz, blanks); 1231 1232 /* prefix */ 1233 if (sign) 1234 PRINT(&sign, 1); 1235 1236 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1237 ox[0] = '0'; 1238 PRINT(ox, 2); 1239 } 1240 1241 /* right-adjusting zero padding */ 1242 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1243 PAD(width - realsz, zeroes); 1244 1245 /* leading zeroes from decimal precision */ 1246 PAD(dprec - size, zeroes); 1247 1248 /* the string or number proper */ 1249 #ifndef NO_FLOATING_POINT 1250 if ((flags & FPT) == 0) { 1251 PRINT(result, size); 1252 } else { /* glue together f_p fragments */ 1253 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1254 if (expt <= 0) { 1255 PRINT(zeroes, 1); 1256 if (prec || flags & ALT) 1257 PRINT(decimal_point, 1); 1258 PAD(-expt, zeroes); 1259 /* already handled initial 0's */ 1260 prec += expt; 1261 } else { 1262 PRINTANDPAD(result, convbuf + ndig, 1263 lead, zeroes); 1264 result += lead; 1265 if (grouping) { 1266 while (nseps>0 || nrepeats>0) { 1267 if (nrepeats > 0) 1268 nrepeats--; 1269 else { 1270 grouping--; 1271 nseps--; 1272 } 1273 PRINT(&thousands_sep, 1274 1); 1275 PRINTANDPAD(result, 1276 convbuf + ndig, 1277 *grouping, zeroes); 1278 result += *grouping; 1279 } 1280 if (result > convbuf + ndig) 1281 result = convbuf + ndig; 1282 } 1283 if (prec || flags & ALT) { 1284 buf[0] = *decimal_point; 1285 PRINT(buf, 1); 1286 } 1287 } 1288 PRINTANDPAD(result, convbuf + ndig, prec, 1289 zeroes); 1290 } else { /* %[eE] or sufficiently long %[gG] */ 1291 if (prec > 1 || flags & ALT) { 1292 buf[0] = *result++; 1293 buf[1] = *decimal_point; 1294 PRINT(buf, 2); 1295 PRINT(result, ndig-1); 1296 PAD(prec - ndig, zeroes); 1297 } else /* XeYYY */ 1298 PRINT(result, 1); 1299 PRINT(expstr, expsize); 1300 } 1301 } 1302 #else 1303 PRINT(result, size); 1304 #endif 1305 /* left-adjusting padding (always blank) */ 1306 if (flags & LADJUST) 1307 PAD(width - realsz, blanks); 1308 1309 /* finally, adjust ret */ 1310 ret += prsize; 1311 } 1312 done: 1313 error: 1314 va_end(orgap); 1315 if (convbuf != NULL) 1316 free(convbuf); 1317 if (__sferror(fp)) 1318 ret = EOF; 1319 if ((argtable != NULL) && (argtable != statargtable)) 1320 free (argtable); 1321 return (ret); 1322 /* NOTREACHED */ 1323 } 1324 1325 /* 1326 * Find all arguments when a positional parameter is encountered. Returns a 1327 * table, indexed by argument number, of pointers to each arguments. The 1328 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1329 * It will be replaces with a malloc-ed one if it overflows. 1330 */ 1331 static void 1332 __find_arguments (const wchar_t *fmt0, va_list ap, union arg **argtable) 1333 { 1334 wchar_t *fmt; /* format string */ 1335 wchar_t ch; /* character from fmt */ 1336 int n, n2; /* handy integer (short term usage) */ 1337 wchar_t *cp; /* handy char pointer (short term usage) */ 1338 int flags; /* flags as above */ 1339 enum typeid *typetable; /* table of types */ 1340 enum typeid stattypetable [STATIC_ARG_TBL_SIZE]; 1341 int tablesize; /* current size of type table */ 1342 int tablemax; /* largest used index in table */ 1343 int nextarg; /* 1-based argument index */ 1344 1345 /* 1346 * Add an argument type to the table, expanding if necessary. 1347 */ 1348 #define ADDTYPE(type) \ 1349 /*LINTED null effect*/ \ 1350 (void)((nextarg >= tablesize) ? \ 1351 __grow_type_table(nextarg, &typetable, &tablesize) : (void)0, \ 1352 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1353 typetable[nextarg++] = type) 1354 1355 #define ADDSARG() \ 1356 (void)((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \ 1357 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \ 1358 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \ 1359 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1360 ((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT)))))) 1361 1362 #define ADDUARG() \ 1363 (void)((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \ 1364 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \ 1365 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \ 1366 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1367 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT)))))) 1368 1369 /* 1370 * Add * arguments to the type array. 1371 */ 1372 #define ADDASTER() \ 1373 n2 = 0; \ 1374 cp = fmt; \ 1375 while (is_digit(*cp)) { \ 1376 n2 = 10 * n2 + to_digit(*cp); \ 1377 cp++; \ 1378 } \ 1379 if (*cp == '$') { \ 1380 int hold = nextarg; \ 1381 nextarg = n2; \ 1382 ADDTYPE (T_INT); \ 1383 nextarg = hold; \ 1384 fmt = ++cp; \ 1385 } else { \ 1386 ADDTYPE (T_INT); \ 1387 } 1388 fmt = (wchar_t *)__UNCONST(fmt0); 1389 typetable = stattypetable; 1390 tablesize = STATIC_ARG_TBL_SIZE; 1391 tablemax = 0; 1392 nextarg = 1; 1393 for (n = 0; n < STATIC_ARG_TBL_SIZE; n++) 1394 typetable[n] = T_UNUSED; 1395 1396 /* 1397 * Scan the format for conversions (`%' character). 1398 */ 1399 for (;;) { 1400 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1401 /* void */; 1402 if (ch == '\0') 1403 goto done; 1404 fmt++; /* skip over '%' */ 1405 1406 flags = 0; 1407 1408 rflag: ch = *fmt++; 1409 reswitch: switch (ch) { 1410 case ' ': 1411 case '#': 1412 goto rflag; 1413 case '*': 1414 ADDASTER (); 1415 goto rflag; 1416 case '-': 1417 case '+': 1418 case '\'': 1419 goto rflag; 1420 case '.': 1421 if ((ch = *fmt++) == '*') { 1422 ADDASTER (); 1423 goto rflag; 1424 } 1425 while (is_digit(ch)) { 1426 ch = *fmt++; 1427 } 1428 goto reswitch; 1429 case '0': 1430 goto rflag; 1431 case '1': case '2': case '3': case '4': 1432 case '5': case '6': case '7': case '8': case '9': 1433 n = 0; 1434 do { 1435 n = 10 * n + to_digit(ch); 1436 ch = *fmt++; 1437 } while (is_digit(ch)); 1438 if (ch == '$') { 1439 nextarg = n; 1440 goto rflag; 1441 } 1442 goto reswitch; 1443 #ifndef NO_FLOATING_POINT 1444 case 'L': 1445 flags |= LONGDBL; 1446 goto rflag; 1447 #endif 1448 case 'h': 1449 if (flags & SHORTINT) { 1450 flags &= ~SHORTINT; 1451 flags |= CHARINT; 1452 } else 1453 flags |= SHORTINT; 1454 goto rflag; 1455 case 'j': 1456 flags |= INTMAXT; 1457 goto rflag; 1458 case 'l': 1459 if (flags & LONGINT) { 1460 flags &= ~LONGINT; 1461 flags |= LLONGINT; 1462 } else 1463 flags |= LONGINT; 1464 goto rflag; 1465 case 'q': 1466 flags |= LLONGINT; /* not necessarily */ 1467 goto rflag; 1468 case 't': 1469 flags |= PTRDIFFT; 1470 goto rflag; 1471 case 'z': 1472 flags |= SIZET; 1473 goto rflag; 1474 case 'C': 1475 flags |= LONGINT; 1476 /*FALLTHROUGH*/ 1477 case 'c': 1478 if (flags & LONGINT) 1479 ADDTYPE(T_WINT); 1480 else 1481 ADDTYPE(T_INT); 1482 break; 1483 case 'D': 1484 flags |= LONGINT; 1485 /*FALLTHROUGH*/ 1486 case 'd': 1487 case 'i': 1488 ADDSARG(); 1489 break; 1490 #ifndef NO_FLOATING_POINT 1491 case 'a': 1492 case 'A': 1493 case 'e': 1494 case 'E': 1495 case 'f': 1496 case 'g': 1497 case 'G': 1498 if (flags & LONGDBL) 1499 ADDTYPE(T_LONG_DOUBLE); 1500 else 1501 ADDTYPE(T_DOUBLE); 1502 break; 1503 #endif /* !NO_FLOATING_POINT */ 1504 case 'n': 1505 if (flags & INTMAXT) 1506 ADDTYPE(TP_INTMAXT); 1507 else if (flags & PTRDIFFT) 1508 ADDTYPE(TP_PTRDIFFT); 1509 else if (flags & SIZET) 1510 ADDTYPE(TP_SIZET); 1511 else if (flags & LLONGINT) 1512 ADDTYPE(TP_LLONG); 1513 else if (flags & LONGINT) 1514 ADDTYPE(TP_LONG); 1515 else if (flags & SHORTINT) 1516 ADDTYPE(TP_SHORT); 1517 else if (flags & CHARINT) 1518 ADDTYPE(TP_SCHAR); 1519 else 1520 ADDTYPE(TP_INT); 1521 continue; /* no output */ 1522 case 'O': 1523 flags |= LONGINT; 1524 /*FALLTHROUGH*/ 1525 case 'o': 1526 ADDUARG(); 1527 break; 1528 case 'p': 1529 ADDTYPE(TP_VOID); 1530 break; 1531 case 'S': 1532 flags |= LONGINT; 1533 /*FALLTHROUGH*/ 1534 case 's': 1535 if (flags & LONGINT) 1536 ADDTYPE(TP_WCHAR); 1537 else 1538 ADDTYPE(TP_CHAR); 1539 break; 1540 case 'U': 1541 flags |= LONGINT; 1542 /*FALLTHROUGH*/ 1543 case 'u': 1544 case 'X': 1545 case 'x': 1546 ADDUARG(); 1547 break; 1548 default: /* "%?" prints ?, unless ? is NUL */ 1549 if (ch == '\0') 1550 goto done; 1551 break; 1552 } 1553 } 1554 done: 1555 /* 1556 * Build the argument table. 1557 */ 1558 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1559 *argtable = (union arg *) 1560 malloc (sizeof (union arg) * (tablemax + 1)); 1561 } 1562 1563 (*argtable) [0].intarg = 0; 1564 for (n = 1; n <= tablemax; n++) { 1565 switch (typetable [n]) { 1566 case T_UNUSED: /* whoops! */ 1567 (*argtable) [n].intarg = va_arg (ap, int); 1568 break; 1569 case TP_SCHAR: 1570 (*argtable) [n].pschararg = va_arg (ap, signed char *); 1571 break; 1572 case TP_SHORT: 1573 (*argtable) [n].pshortarg = va_arg (ap, short *); 1574 break; 1575 case T_INT: 1576 (*argtable) [n].intarg = va_arg (ap, int); 1577 break; 1578 case T_U_INT: 1579 (*argtable) [n].uintarg = va_arg (ap, unsigned int); 1580 break; 1581 case TP_INT: 1582 (*argtable) [n].pintarg = va_arg (ap, int *); 1583 break; 1584 case T_LONG: 1585 (*argtable) [n].longarg = va_arg (ap, long); 1586 break; 1587 case T_U_LONG: 1588 (*argtable) [n].ulongarg = va_arg (ap, unsigned long); 1589 break; 1590 case TP_LONG: 1591 (*argtable) [n].plongarg = va_arg (ap, long *); 1592 break; 1593 case T_LLONG: 1594 (*argtable) [n].longlongarg = va_arg (ap, quad_t); 1595 break; 1596 case T_U_LLONG: 1597 (*argtable) [n].ulonglongarg = va_arg (ap, u_quad_t); 1598 break; 1599 case TP_LLONG: 1600 (*argtable) [n].plonglongarg = va_arg (ap, quad_t *); 1601 break; 1602 case T_PTRDIFFT: 1603 (*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t); 1604 break; 1605 case TP_PTRDIFFT: 1606 (*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *); 1607 break; 1608 case T_SIZET: 1609 (*argtable) [n].sizearg = va_arg (ap, size_t); 1610 break; 1611 case TP_SIZET: 1612 (*argtable) [n].psizearg = va_arg (ap, size_t *); 1613 break; 1614 case T_INTMAXT: 1615 (*argtable) [n].intmaxarg = va_arg (ap, intmax_t); 1616 break; 1617 case T_UINTMAXT: 1618 (*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t); 1619 break; 1620 case TP_INTMAXT: 1621 (*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *); 1622 break; 1623 #ifndef NO_FLOATING_POINT 1624 case T_DOUBLE: 1625 (*argtable) [n].doublearg = va_arg (ap, double); 1626 break; 1627 case T_LONG_DOUBLE: 1628 (*argtable) [n].longdoublearg = va_arg (ap, long double); 1629 break; 1630 #endif 1631 case TP_CHAR: 1632 (*argtable) [n].pchararg = va_arg (ap, char *); 1633 break; 1634 case TP_VOID: 1635 (*argtable) [n].pvoidarg = va_arg (ap, void *); 1636 break; 1637 case T_WINT: 1638 (*argtable) [n].wintarg = va_arg (ap, wint_t); 1639 break; 1640 case TP_WCHAR: 1641 (*argtable) [n].pwchararg = va_arg (ap, wchar_t *); 1642 break; 1643 } 1644 } 1645 1646 if ((typetable != NULL) && (typetable != stattypetable)) 1647 free (typetable); 1648 } 1649 1650 /* 1651 * Increase the size of the type table. 1652 */ 1653 static void 1654 __grow_type_table (int nextarg, enum typeid **typetable, int *tablesize) 1655 { 1656 enum typeid *const oldtable = *typetable; 1657 const int oldsize = *tablesize; 1658 enum typeid *newtable; 1659 int n, newsize = oldsize * 2; 1660 1661 if (newsize < nextarg + 1) 1662 newsize = nextarg + 1; 1663 if (oldsize == STATIC_ARG_TBL_SIZE) { 1664 if ((newtable = malloc(newsize * sizeof(enum typeid))) == NULL) 1665 abort(); /* XXX handle better */ 1666 memcpy(newtable, oldtable, oldsize * sizeof(enum typeid)); 1667 } else { 1668 newtable = realloc(oldtable, newsize * sizeof(enum typeid)); 1669 if (newtable == NULL) 1670 abort(); /* XXX handle better */ 1671 } 1672 for (n = oldsize; n < newsize; n++) 1673 newtable[n] = T_UNUSED; 1674 1675 *typetable = newtable; 1676 *tablesize = newsize; 1677 } 1678 1679 1680 #ifndef NO_FLOATING_POINT 1681 #ifndef WIDE_DOUBLE 1682 static char * 1683 cvt(double value, int ndigits, int flags, char *sign, int *decpt, int ch, 1684 int *length) 1685 { 1686 int mode, dsgn; 1687 char *digits, *bp, *rve; 1688 1689 _DIAGASSERT(decpt != NULL); 1690 _DIAGASSERT(length != NULL); 1691 _DIAGASSERT(sign != NULL); 1692 1693 if (ch == 'f') { 1694 mode = 3; /* ndigits after the decimal point */ 1695 } else { 1696 /* To obtain ndigits after the decimal point for the 'e' 1697 * and 'E' formats, round to ndigits + 1 significant 1698 * figures. 1699 */ 1700 if (ch == 'e' || ch == 'E') { 1701 ndigits++; 1702 } 1703 mode = 2; /* ndigits significant digits */ 1704 } 1705 1706 digits = __dtoa(value, mode, ndigits, decpt, &dsgn, &rve); 1707 if (dsgn) { 1708 value = -value; 1709 *sign = '-'; 1710 } else 1711 *sign = '\000'; 1712 if ((ch != 'g' && ch != 'G') || flags & ALT) { /* Print trailing zeros */ 1713 bp = digits + ndigits; 1714 if (ch == 'f') { 1715 if (*digits == '0' && value) 1716 *decpt = -ndigits + 1; 1717 bp += *decpt; 1718 } 1719 if (value == 0) /* kludge for __dtoa irregularity */ 1720 rve = bp; 1721 while (rve < bp) 1722 *rve++ = '0'; 1723 } 1724 *length = rve - digits; 1725 return digits; 1726 } 1727 1728 static int 1729 exponent(wchar_t *p0, int expo, wchar_t fmtch) 1730 { 1731 wchar_t *p, *t; 1732 wchar_t expbuf[MAXEXPDIG]; 1733 1734 p = p0; 1735 *p++ = fmtch; 1736 if (expo < 0) { 1737 expo = -expo; 1738 *p++ = '-'; 1739 } 1740 else 1741 *p++ = '+'; 1742 t = expbuf + MAXEXPDIG; 1743 if (expo > 9) { 1744 do { 1745 *--t = to_char(expo % 10); 1746 } while ((expo /= 10) > 9); 1747 *--t = to_char(expo); 1748 for (; t < expbuf + MAXEXPDIG; *p++ = *t++); 1749 } 1750 else { 1751 /* 1752 * Exponents for decimal floating point conversions 1753 * (%[eEgG]) must be at least two characters long, 1754 * whereas exponents for hexadecimal conversions can 1755 * be only one character long. 1756 */ 1757 if (fmtch == 'e' || fmtch == 'E') 1758 *p++ = '0'; 1759 *p++ = to_char(expo); 1760 } 1761 return (p - p0); 1762 } 1763 #endif 1764 #endif /* !NO_FLOATING_POINT */ 1765