1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Chris Torek. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 static char sccsid[] = "@(#)vfprintf.c 8.1 (Berkeley) 6/4/93"; 39 #endif /* LIBC_SCCS and not lint */ 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 /* 44 * Actual printf innards. 45 * 46 * This code is large and complicated... 47 */ 48 49 #include "namespace.h" 50 #include <sys/types.h> 51 52 #include <ctype.h> 53 #include <limits.h> 54 #include <locale.h> 55 #include <stddef.h> 56 #include <stdint.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <wchar.h> 61 62 #include <stdarg.h> 63 #include "un-namespace.h" 64 65 #include "libc_private.h" 66 #include "local.h" 67 #include "fvwrite.h" 68 69 /* Define FLOATING_POINT to get floating point. */ 70 #define FLOATING_POINT 71 72 union arg { 73 int intarg; 74 u_int uintarg; 75 long longarg; 76 u_long ulongarg; 77 long long longlongarg; 78 unsigned long long ulonglongarg; 79 ptrdiff_t ptrdiffarg; 80 size_t sizearg; 81 intmax_t intmaxarg; 82 uintmax_t uintmaxarg; 83 void *pvoidarg; 84 char *pchararg; 85 signed char *pschararg; 86 short *pshortarg; 87 int *pintarg; 88 long *plongarg; 89 long long *plonglongarg; 90 ptrdiff_t *pptrdiffarg; 91 size_t *psizearg; 92 intmax_t *pintmaxarg; 93 #ifdef FLOATING_POINT 94 double doublearg; 95 long double longdoublearg; 96 #endif 97 wint_t wintarg; 98 wchar_t *pwchararg; 99 }; 100 101 /* 102 * Type ids for argument type table. 103 */ 104 enum typeid { 105 T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT, 106 T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG, 107 T_PTRDIFFT, TP_PTRDIFFT, T_SIZET, TP_SIZET, 108 T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR, 109 T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR 110 }; 111 112 static int __sprint(FILE *, struct __suio *); 113 static int __sbprintf(FILE *, const char *, va_list) __printflike(2, 0); 114 static char *__ujtoa(uintmax_t, char *, int, int, char *, int, char, 115 const char *); 116 static char *__ultoa(u_long, char *, int, int, char *, int, char, 117 const char *); 118 static char *__wcsconv(wchar_t *, int); 119 static void __find_arguments(const char *, va_list, union arg **); 120 static void __grow_type_table(int, enum typeid **, int *); 121 122 /* 123 * Flush out all the vectors defined by the given uio, 124 * then reset it so that it can be reused. 125 */ 126 static int 127 __sprint(FILE *fp, struct __suio *uio) 128 { 129 int err; 130 131 if (uio->uio_resid == 0) { 132 uio->uio_iovcnt = 0; 133 return (0); 134 } 135 err = __sfvwrite(fp, uio); 136 uio->uio_resid = 0; 137 uio->uio_iovcnt = 0; 138 return (err); 139 } 140 141 /* 142 * Helper function for `fprintf to unbuffered unix file': creates a 143 * temporary buffer. We only work on write-only files; this avoids 144 * worries about ungetc buffers and so forth. 145 */ 146 static int 147 __sbprintf(FILE *fp, const char *fmt, va_list ap) 148 { 149 int ret; 150 FILE fake; 151 unsigned char buf[BUFSIZ]; 152 153 /* copy the important variables */ 154 fake._flags = fp->_flags & ~__SNBF; 155 fake._file = fp->_file; 156 fake._cookie = fp->_cookie; 157 fake._write = fp->_write; 158 fake._extra = fp->_extra; 159 160 /* set up the buffer */ 161 fake._bf._base = fake._p = buf; 162 fake._bf._size = fake._w = sizeof(buf); 163 fake._lbfsize = 0; /* not actually used, but Just In Case */ 164 165 /* do the work, then copy any error status */ 166 ret = __vfprintf(&fake, fmt, ap); 167 if (ret >= 0 && __fflush(&fake)) 168 ret = EOF; 169 if (fake._flags & __SERR) 170 fp->_flags |= __SERR; 171 return (ret); 172 } 173 174 /* 175 * Macros for converting digits to letters and vice versa 176 */ 177 #define to_digit(c) ((c) - '0') 178 #define is_digit(c) ((unsigned)to_digit(c) <= 9) 179 #define to_char(n) ((n) + '0') 180 181 /* 182 * Convert an unsigned long to ASCII for printf purposes, returning 183 * a pointer to the first character of the string representation. 184 * Octal numbers can be forced to have a leading zero; hex numbers 185 * use the given digits. 186 */ 187 static char * 188 __ultoa(u_long val, char *endp, int base, int octzero, char *xdigs, 189 int needgrp, char thousep, const char *grp) 190 { 191 char *cp = endp; 192 long sval; 193 int ndig; 194 195 /* 196 * Handle the three cases separately, in the hope of getting 197 * better/faster code. 198 */ 199 switch (base) { 200 case 10: 201 if (val < 10) { /* many numbers are 1 digit */ 202 *--cp = to_char(val); 203 return (cp); 204 } 205 ndig = 0; 206 /* 207 * On many machines, unsigned arithmetic is harder than 208 * signed arithmetic, so we do at most one unsigned mod and 209 * divide; this is sufficient to reduce the range of 210 * the incoming value to where signed arithmetic works. 211 */ 212 if (val > LONG_MAX) { 213 *--cp = to_char(val % 10); 214 ndig++; 215 sval = val / 10; 216 } else 217 sval = val; 218 do { 219 *--cp = to_char(sval % 10); 220 ndig++; 221 /* 222 * If (*grp == CHAR_MAX) then no more grouping 223 * should be performed. 224 */ 225 if (needgrp && ndig == *grp && *grp != CHAR_MAX 226 && sval > 9) { 227 *--cp = thousep; 228 ndig = 0; 229 /* 230 * If (*(grp+1) == '\0') then we have to 231 * use *grp character (last grouping rule) 232 * for all next cases 233 */ 234 if (*(grp+1) != '\0') 235 grp++; 236 } 237 sval /= 10; 238 } while (sval != 0); 239 break; 240 241 case 8: 242 do { 243 *--cp = to_char(val & 7); 244 val >>= 3; 245 } while (val); 246 if (octzero && *cp != '0') 247 *--cp = '0'; 248 break; 249 250 case 16: 251 do { 252 *--cp = xdigs[val & 15]; 253 val >>= 4; 254 } while (val); 255 break; 256 257 default: /* oops */ 258 abort(); 259 } 260 return (cp); 261 } 262 263 /* Identical to __ultoa, but for intmax_t. */ 264 static char * 265 __ujtoa(uintmax_t val, char *endp, int base, int octzero, char *xdigs, 266 int needgrp, char thousep, const char *grp) 267 { 268 char *cp = endp; 269 intmax_t sval; 270 int ndig; 271 272 /* quick test for small values; __ultoa is typically much faster */ 273 /* (perhaps instead we should run until small, then call __ultoa?) */ 274 if (val <= ULONG_MAX) 275 return (__ultoa((u_long)val, endp, base, octzero, xdigs, 276 needgrp, thousep, grp)); 277 switch (base) { 278 case 10: 279 if (val < 10) { 280 *--cp = to_char(val % 10); 281 return (cp); 282 } 283 ndig = 0; 284 if (val > INTMAX_MAX) { 285 *--cp = to_char(val % 10); 286 ndig++; 287 sval = val / 10; 288 } else 289 sval = val; 290 do { 291 *--cp = to_char(sval % 10); 292 ndig++; 293 /* 294 * If (*grp == CHAR_MAX) then no more grouping 295 * should be performed. 296 */ 297 if (needgrp && *grp != CHAR_MAX && ndig == *grp 298 && sval > 9) { 299 *--cp = thousep; 300 ndig = 0; 301 /* 302 * If (*(grp+1) == '\0') then we have to 303 * use *grp character (last grouping rule) 304 * for all next cases 305 */ 306 if (*(grp+1) != '\0') 307 grp++; 308 } 309 sval /= 10; 310 } while (sval != 0); 311 break; 312 313 case 8: 314 do { 315 *--cp = to_char(val & 7); 316 val >>= 3; 317 } while (val); 318 if (octzero && *cp != '0') 319 *--cp = '0'; 320 break; 321 322 case 16: 323 do { 324 *--cp = xdigs[val & 15]; 325 val >>= 4; 326 } while (val); 327 break; 328 329 default: 330 abort(); 331 } 332 return (cp); 333 } 334 335 /* 336 * Convert a wide character string argument for the %ls format to a multibyte 337 * string representation. ``prec'' specifies the maximum number of bytes 338 * to output. If ``prec'' is greater than or equal to zero, we can't assume 339 * that the wide char. string ends in a null character. 340 */ 341 static char * 342 __wcsconv(wchar_t *wcsarg, int prec) 343 { 344 char buf[MB_LEN_MAX]; 345 wchar_t *p; 346 char *convbuf, *mbp; 347 size_t clen, nbytes; 348 mbstate_t mbs; 349 350 /* 351 * Determine the number of bytes to output and allocate space for 352 * the output. 353 */ 354 memset(&mbs, 0, sizeof(mbs)); 355 if (prec >= 0) { 356 nbytes = 0; 357 p = wcsarg; 358 for (;;) { 359 clen = wcrtomb(buf, *p++, &mbs); 360 if (clen == 0 || clen == (size_t)-1 || 361 nbytes + clen > prec) 362 break; 363 nbytes += clen; 364 } 365 } else { 366 p = wcsarg; 367 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs); 368 if (nbytes == (size_t)-1) 369 return (NULL); 370 } 371 if ((convbuf = malloc(nbytes + 1)) == NULL) 372 return (NULL); 373 374 /* 375 * Fill the output buffer with the multibyte representations of as 376 * many wide characters as will fit. 377 */ 378 mbp = convbuf; 379 p = wcsarg; 380 memset(&mbs, 0, sizeof(mbs)); 381 while (mbp - convbuf < nbytes) { 382 clen = wcrtomb(mbp, *p++, &mbs); 383 if (clen == 0 || clen == (size_t)-1) 384 break; 385 mbp += clen; 386 } 387 *mbp = '\0'; 388 if (clen == (size_t)-1) 389 return (NULL); 390 391 return (convbuf); 392 } 393 394 /* 395 * MT-safe version 396 */ 397 int 398 vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap) 399 400 { 401 int ret; 402 403 FLOCKFILE(fp); 404 ret = __vfprintf(fp, fmt0, ap); 405 FUNLOCKFILE(fp); 406 return (ret); 407 } 408 409 #ifdef FLOATING_POINT 410 #include <math.h> 411 #include "floatio.h" 412 413 #define BUF ((MAXEXP*2)+MAXFRACT+1) /* + decimal point */ 414 #define DEFPREC 6 415 416 static char *cvt(double, int, int, char *, int *, int, int *, char **); 417 static int exponent(char *, int, int); 418 419 #else /* no FLOATING_POINT */ 420 421 #define BUF 136 422 423 #endif /* FLOATING_POINT */ 424 425 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 426 427 /* 428 * Flags used during conversion. 429 */ 430 #define ALT 0x001 /* alternate form */ 431 #define HEXPREFIX 0x002 /* add 0x or 0X prefix */ 432 #define LADJUST 0x004 /* left adjustment */ 433 #define LONGDBL 0x008 /* long double */ 434 #define LONGINT 0x010 /* long integer */ 435 #define LLONGINT 0x020 /* long long integer */ 436 #define SHORTINT 0x040 /* short integer */ 437 #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */ 438 #define FPT 0x100 /* Floating point number */ 439 #define GROUPING 0x200 /* use grouping ("'" flag) */ 440 /* C99 additional size modifiers: */ 441 #define SIZET 0x400 /* size_t */ 442 #define PTRDIFFT 0x800 /* ptrdiff_t */ 443 #define INTMAXT 0x1000 /* intmax_t */ 444 #define CHARINT 0x2000 /* print char using int format */ 445 446 /* 447 * Non-MT-safe version 448 */ 449 int 450 __vfprintf(FILE *fp, const char *fmt0, va_list ap) 451 { 452 char *fmt; /* format string */ 453 int ch; /* character from fmt */ 454 int n, n2; /* handy integer (short term usage) */ 455 char *cp; /* handy char pointer (short term usage) */ 456 struct __siov *iovp; /* for PRINT macro */ 457 int flags; /* flags as above */ 458 int ret; /* return value accumulator */ 459 int width; /* width from format (%8d), or 0 */ 460 int prec; /* precision from format (%.3d), or -1 */ 461 char sign; /* sign prefix (' ', '+', '-', or \0) */ 462 char thousands_sep; /* locale specific thousands separator */ 463 const char *grouping; /* locale specific numeric grouping rules */ 464 #ifdef FLOATING_POINT 465 char *decimal_point; /* locale specific decimal point */ 466 char softsign; /* temporary negative sign for floats */ 467 double _double; /* double precision arguments %[eEfgG] */ 468 int expt; /* integer value of exponent */ 469 int expsize; /* character count for expstr */ 470 int ndig; /* actual number of digits returned by cvt */ 471 char expstr[7]; /* buffer for exponent string */ 472 char *dtoaresult; /* buffer allocated by dtoa */ 473 #endif 474 u_long ulval; /* integer arguments %[diouxX] */ 475 uintmax_t ujval; /* %j, %ll, %q, %t, %z integers */ 476 int base; /* base for [diouxX] conversion */ 477 int dprec; /* a copy of prec if [diouxX], 0 otherwise */ 478 int realsz; /* field size expanded by dprec, sign, etc */ 479 int size; /* size of converted field or string */ 480 int prsize; /* max size of printed field */ 481 char *xdigs; /* digits for [xX] conversion */ 482 #define NIOV 8 483 struct __suio uio; /* output information: summary */ 484 struct __siov iov[NIOV];/* ... and individual io vectors */ 485 char buf[BUF]; /* space for %c, %[diouxX], %[eEfFgG] */ 486 char ox[2]; /* space for 0x hex-prefix */ 487 union arg *argtable; /* args, built due to positional arg */ 488 union arg statargtable [STATIC_ARG_TBL_SIZE]; 489 int nextarg; /* 1-based argument index */ 490 va_list orgap; /* original argument pointer */ 491 char *convbuf; /* wide to multibyte conversion result */ 492 493 /* 494 * Choose PADSIZE to trade efficiency vs. size. If larger printf 495 * fields occur frequently, increase PADSIZE and make the initialisers 496 * below longer. 497 */ 498 #define PADSIZE 16 /* pad chunk size */ 499 static char blanks[PADSIZE] = 500 {' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '}; 501 static char zeroes[PADSIZE] = 502 {'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'}; 503 504 /* 505 * BEWARE, these `goto error' on error, and PAD uses `n'. 506 */ 507 #define PRINT(ptr, len) { \ 508 iovp->iov_base = (ptr); \ 509 iovp->iov_len = (len); \ 510 uio.uio_resid += (len); \ 511 iovp++; \ 512 if (++uio.uio_iovcnt >= NIOV) { \ 513 if (__sprint(fp, &uio)) \ 514 goto error; \ 515 iovp = iov; \ 516 } \ 517 } 518 #define PAD(howmany, with) { \ 519 if ((n = (howmany)) > 0) { \ 520 while (n > PADSIZE) { \ 521 PRINT(with, PADSIZE); \ 522 n -= PADSIZE; \ 523 } \ 524 PRINT(with, n); \ 525 } \ 526 } 527 #define FLUSH() { \ 528 if (uio.uio_resid && __sprint(fp, &uio)) \ 529 goto error; \ 530 uio.uio_iovcnt = 0; \ 531 iovp = iov; \ 532 } 533 534 /* 535 * Get the argument indexed by nextarg. If the argument table is 536 * built, use it to get the argument. If its not, get the next 537 * argument (and arguments must be gotten sequentially). 538 */ 539 #define GETARG(type) \ 540 ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \ 541 (nextarg++, va_arg(ap, type))) 542 543 /* 544 * To extend shorts properly, we need both signed and unsigned 545 * argument extraction methods. 546 */ 547 #define SARG() \ 548 (flags&LONGINT ? GETARG(long) : \ 549 flags&SHORTINT ? (long)(short)GETARG(int) : \ 550 flags&CHARINT ? (long)(signed char)GETARG(int) : \ 551 (long)GETARG(int)) 552 #define UARG() \ 553 (flags&LONGINT ? GETARG(u_long) : \ 554 flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \ 555 flags&CHARINT ? (u_long)(u_char)GETARG(int) : \ 556 (u_long)GETARG(u_int)) 557 #define INTMAX_SIZE (INTMAXT|SIZET|PTRDIFFT|LLONGINT) 558 #define SJARG() \ 559 (flags&INTMAXT ? GETARG(intmax_t) : \ 560 flags&SIZET ? (intmax_t)GETARG(size_t) : \ 561 flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \ 562 (intmax_t)GETARG(long long)) 563 #define UJARG() \ 564 (flags&INTMAXT ? GETARG(uintmax_t) : \ 565 flags&SIZET ? (uintmax_t)GETARG(size_t) : \ 566 flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \ 567 (uintmax_t)GETARG(unsigned long long)) 568 569 /* 570 * Get * arguments, including the form *nn$. Preserve the nextarg 571 * that the argument can be gotten once the type is determined. 572 */ 573 #define GETASTER(val) \ 574 n2 = 0; \ 575 cp = fmt; \ 576 while (is_digit(*cp)) { \ 577 n2 = 10 * n2 + to_digit(*cp); \ 578 cp++; \ 579 } \ 580 if (*cp == '$') { \ 581 int hold = nextarg; \ 582 if (argtable == NULL) { \ 583 argtable = statargtable; \ 584 __find_arguments (fmt0, orgap, &argtable); \ 585 } \ 586 nextarg = n2; \ 587 val = GETARG (int); \ 588 nextarg = hold; \ 589 fmt = ++cp; \ 590 } else { \ 591 val = GETARG (int); \ 592 } 593 594 595 thousands_sep = '\0'; 596 grouping = NULL; 597 convbuf = NULL; 598 #ifdef FLOATING_POINT 599 dtoaresult = NULL; 600 decimal_point = localeconv()->decimal_point; 601 #endif 602 /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */ 603 if (cantwrite(fp)) 604 return (EOF); 605 606 /* optimise fprintf(stderr) (and other unbuffered Unix files) */ 607 if ((fp->_flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) && 608 fp->_file >= 0) 609 return (__sbprintf(fp, fmt0, ap)); 610 611 fmt = (char *)fmt0; 612 argtable = NULL; 613 nextarg = 1; 614 va_copy(orgap, ap); 615 uio.uio_iov = iovp = iov; 616 uio.uio_resid = 0; 617 uio.uio_iovcnt = 0; 618 ret = 0; 619 620 /* 621 * Scan the format for conversions (`%' character). 622 */ 623 for (;;) { 624 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 625 /* void */; 626 if ((n = fmt - cp) != 0) { 627 if ((unsigned)ret + n > INT_MAX) { 628 ret = EOF; 629 goto error; 630 } 631 PRINT(cp, n); 632 ret += n; 633 } 634 if (ch == '\0') 635 goto done; 636 fmt++; /* skip over '%' */ 637 638 flags = 0; 639 dprec = 0; 640 width = 0; 641 prec = -1; 642 sign = '\0'; 643 644 rflag: ch = *fmt++; 645 reswitch: switch (ch) { 646 case ' ': 647 /*- 648 * ``If the space and + flags both appear, the space 649 * flag will be ignored.'' 650 * -- ANSI X3J11 651 */ 652 if (!sign) 653 sign = ' '; 654 goto rflag; 655 case '#': 656 flags |= ALT; 657 goto rflag; 658 case '*': 659 /*- 660 * ``A negative field width argument is taken as a 661 * - flag followed by a positive field width.'' 662 * -- ANSI X3J11 663 * They don't exclude field widths read from args. 664 */ 665 GETASTER (width); 666 if (width >= 0) 667 goto rflag; 668 width = -width; 669 /* FALLTHROUGH */ 670 case '-': 671 flags |= LADJUST; 672 goto rflag; 673 case '+': 674 sign = '+'; 675 goto rflag; 676 case '\'': 677 flags |= GROUPING; 678 thousands_sep = *(localeconv()->thousands_sep); 679 grouping = localeconv()->grouping; 680 goto rflag; 681 case '.': 682 if ((ch = *fmt++) == '*') { 683 GETASTER (n); 684 prec = n < 0 ? -1 : n; 685 goto rflag; 686 } 687 n = 0; 688 while (is_digit(ch)) { 689 n = 10 * n + to_digit(ch); 690 ch = *fmt++; 691 } 692 prec = n < 0 ? -1 : n; 693 goto reswitch; 694 case '0': 695 /*- 696 * ``Note that 0 is taken as a flag, not as the 697 * beginning of a field width.'' 698 * -- ANSI X3J11 699 */ 700 flags |= ZEROPAD; 701 goto rflag; 702 case '1': case '2': case '3': case '4': 703 case '5': case '6': case '7': case '8': case '9': 704 n = 0; 705 do { 706 n = 10 * n + to_digit(ch); 707 ch = *fmt++; 708 } while (is_digit(ch)); 709 if (ch == '$') { 710 nextarg = n; 711 if (argtable == NULL) { 712 argtable = statargtable; 713 __find_arguments (fmt0, orgap, 714 &argtable); 715 } 716 goto rflag; 717 } 718 width = n; 719 goto reswitch; 720 #ifdef FLOATING_POINT 721 case 'L': 722 flags |= LONGDBL; 723 goto rflag; 724 #endif 725 case 'h': 726 if (flags & SHORTINT) { 727 flags &= ~SHORTINT; 728 flags |= CHARINT; 729 } else 730 flags |= SHORTINT; 731 goto rflag; 732 case 'j': 733 flags |= INTMAXT; 734 goto rflag; 735 case 'l': 736 if (flags & LONGINT) { 737 flags &= ~LONGINT; 738 flags |= LLONGINT; 739 } else 740 flags |= LONGINT; 741 goto rflag; 742 case 'q': 743 flags |= LLONGINT; /* not necessarily */ 744 goto rflag; 745 case 't': 746 flags |= PTRDIFFT; 747 goto rflag; 748 case 'z': 749 flags |= SIZET; 750 goto rflag; 751 case 'c': 752 if (flags & LONGINT) { 753 mbstate_t mbs; 754 size_t mbseqlen; 755 756 memset(&mbs, 0, sizeof(mbs)); 757 mbseqlen = wcrtomb(cp = buf, 758 (wchar_t)GETARG(wint_t), &mbs); 759 if (mbseqlen == (size_t)-1) 760 goto error; 761 size = (int)mbseqlen; 762 } else { 763 *(cp = buf) = GETARG(int); 764 size = 1; 765 } 766 sign = '\0'; 767 break; 768 case 'D': 769 flags |= LONGINT; 770 /*FALLTHROUGH*/ 771 case 'd': 772 case 'i': 773 if (flags & INTMAX_SIZE) { 774 ujval = SJARG(); 775 if ((intmax_t)ujval < 0) { 776 ujval = -ujval; 777 sign = '-'; 778 } 779 } else { 780 ulval = SARG(); 781 if ((long)ulval < 0) { 782 ulval = -ulval; 783 sign = '-'; 784 } 785 } 786 base = 10; 787 goto number; 788 #ifdef FLOATING_POINT 789 #ifdef HEXFLOAT 790 case 'a': 791 case 'A': 792 #endif 793 case 'e': 794 case 'E': 795 /*- 796 * Grouping apply to %i, %d, %u, %f, %F, %g, %G 797 * conversion specifiers only. For other conversions 798 * behavior is undefined. 799 * -- POSIX 800 */ 801 flags &= ~GROUPING; 802 /*FALLTHROUGH*/ 803 case 'f': 804 case 'F': 805 goto fp_begin; 806 case 'g': 807 case 'G': 808 if (prec == 0) 809 prec = 1; 810 fp_begin: if (prec == -1) 811 prec = DEFPREC; 812 if (flags & LONGDBL) 813 /* XXX this loses precision. */ 814 _double = (double)GETARG(long double); 815 else 816 _double = GETARG(double); 817 /* do this before tricky precision changes */ 818 if (isinf(_double)) { 819 if (_double < 0) 820 sign = '-'; 821 if (isupper(ch)) 822 cp = "INF"; 823 else 824 cp = "inf"; 825 size = 3; 826 break; 827 } 828 if (isnan(_double)) { 829 if (isupper(ch)) 830 cp = "NAN"; 831 else 832 cp = "nan"; 833 size = 3; 834 break; 835 } 836 flags |= FPT; 837 if (dtoaresult != NULL) { 838 free(dtoaresult); 839 dtoaresult = NULL; 840 } 841 cp = cvt(_double, prec, flags, &softsign, 842 &expt, ch, &ndig, &dtoaresult); 843 if (ch == 'g' || ch == 'G') { 844 if (expt <= -4 || expt > prec) 845 ch = (ch == 'g') ? 'e' : 'E'; 846 else 847 ch = 'g'; 848 } 849 if (ch == 'e' || ch == 'E') { 850 --expt; 851 expsize = exponent(expstr, expt, ch); 852 size = expsize + ndig; 853 if (ndig > 1 || flags & ALT) 854 ++size; 855 } else if (ch == 'f' || ch == 'F') { 856 if (expt > 0) { 857 size = expt; 858 if (prec || flags & ALT) 859 size += prec + 1; 860 } else /* "0.X" */ 861 size = prec + 2; 862 } else if (expt >= ndig) { /* fixed g fmt */ 863 size = expt; 864 if (flags & ALT) 865 ++size; 866 } else 867 size = ndig + (expt > 0 ? 868 1 : 2 - expt); 869 870 if (softsign) 871 sign = '-'; 872 break; 873 #endif /* FLOATING_POINT */ 874 case 'n': 875 /* 876 * Assignment-like behavior is specified if the 877 * value overflows or is otherwise unrepresentable. 878 * C99 says to use `signed char' for %hhn conversions. 879 */ 880 if (flags & LLONGINT) 881 *GETARG(long long *) = ret; 882 else if (flags & SIZET) 883 *GETARG(ssize_t *) = (ssize_t)ret; 884 else if (flags & PTRDIFFT) 885 *GETARG(ptrdiff_t *) = ret; 886 else if (flags & INTMAXT) 887 *GETARG(intmax_t *) = ret; 888 else if (flags & LONGINT) 889 *GETARG(long *) = ret; 890 else if (flags & SHORTINT) 891 *GETARG(short *) = ret; 892 else if (flags & CHARINT) 893 *GETARG(signed char *) = ret; 894 else 895 *GETARG(int *) = ret; 896 continue; /* no output */ 897 case 'O': 898 flags |= LONGINT; 899 /*FALLTHROUGH*/ 900 case 'o': 901 if (flags & INTMAX_SIZE) 902 ujval = UJARG(); 903 else 904 ulval = UARG(); 905 base = 8; 906 goto nosign; 907 case 'p': 908 /*- 909 * ``The argument shall be a pointer to void. The 910 * value of the pointer is converted to a sequence 911 * of printable characters, in an implementation- 912 * defined manner.'' 913 * -- ANSI X3J11 914 */ 915 ujval = (uintmax_t)(uintptr_t)GETARG(void *); 916 base = 16; 917 xdigs = "0123456789abcdef"; 918 flags = flags | INTMAXT | HEXPREFIX; 919 ch = 'x'; 920 goto nosign; 921 case 's': 922 if (flags & LONGINT) { 923 wchar_t *wcp; 924 925 if (convbuf != NULL) 926 free(convbuf); 927 if ((wcp = GETARG(wchar_t *)) == NULL) 928 cp = "(null)"; 929 else { 930 convbuf = __wcsconv(wcp, prec); 931 if (convbuf == NULL) 932 goto error; 933 cp = convbuf; 934 } 935 } else if ((cp = GETARG(char *)) == NULL) 936 cp = "(null)"; 937 if (prec >= 0) { 938 /* 939 * can't use strlen; can only look for the 940 * NUL in the first `prec' characters, and 941 * strlen() will go further. 942 */ 943 char *p = memchr(cp, 0, (size_t)prec); 944 945 if (p != NULL) { 946 size = p - cp; 947 if (size > prec) 948 size = prec; 949 } else 950 size = prec; 951 } else 952 size = strlen(cp); 953 sign = '\0'; 954 break; 955 case 'U': 956 flags |= LONGINT; 957 /*FALLTHROUGH*/ 958 case 'u': 959 if (flags & INTMAX_SIZE) 960 ujval = UJARG(); 961 else 962 ulval = UARG(); 963 base = 10; 964 goto nosign; 965 case 'X': 966 xdigs = "0123456789ABCDEF"; 967 goto hex; 968 case 'x': 969 xdigs = "0123456789abcdef"; 970 hex: 971 if (flags & INTMAX_SIZE) 972 ujval = UJARG(); 973 else 974 ulval = UARG(); 975 base = 16; 976 /* leading 0x/X only if non-zero */ 977 if (flags & ALT && 978 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0)) 979 flags |= HEXPREFIX; 980 981 flags &= ~GROUPING; 982 /* unsigned conversions */ 983 nosign: sign = '\0'; 984 /*- 985 * ``... diouXx conversions ... if a precision is 986 * specified, the 0 flag will be ignored.'' 987 * -- ANSI X3J11 988 */ 989 number: if ((dprec = prec) >= 0) 990 flags &= ~ZEROPAD; 991 992 /*- 993 * ``The result of converting a zero value with an 994 * explicit precision of zero is no characters.'' 995 * -- ANSI X3J11 996 */ 997 cp = buf + BUF; 998 if (flags & INTMAX_SIZE) { 999 if (ujval != 0 || prec != 0) 1000 cp = __ujtoa(ujval, cp, base, 1001 flags & ALT, xdigs, 1002 flags & GROUPING, thousands_sep, 1003 grouping); 1004 } else { 1005 if (ulval != 0 || prec != 0) 1006 cp = __ultoa(ulval, cp, base, 1007 flags & ALT, xdigs, 1008 flags & GROUPING, thousands_sep, 1009 grouping); 1010 } 1011 size = buf + BUF - cp; 1012 break; 1013 default: /* "%?" prints ?, unless ? is NUL */ 1014 if (ch == '\0') 1015 goto done; 1016 /* pretend it was %c with argument ch */ 1017 cp = buf; 1018 *cp = ch; 1019 size = 1; 1020 sign = '\0'; 1021 break; 1022 } 1023 1024 /* 1025 * All reasonable formats wind up here. At this point, `cp' 1026 * points to a string which (if not flags&LADJUST) should be 1027 * padded out to `width' places. If flags&ZEROPAD, it should 1028 * first be prefixed by any sign or other prefix; otherwise, 1029 * it should be blank padded before the prefix is emitted. 1030 * After any left-hand padding and prefixing, emit zeroes 1031 * required by a decimal [diouxX] precision, then print the 1032 * string proper, then emit zeroes required by any leftover 1033 * floating precision; finally, if LADJUST, pad with blanks. 1034 * 1035 * Compute actual size, so we know how much to pad. 1036 * size excludes decimal prec; realsz includes it. 1037 */ 1038 realsz = dprec > size ? dprec : size; 1039 if (sign) 1040 realsz++; 1041 else if (flags & HEXPREFIX) 1042 realsz += 2; 1043 1044 prsize = width > realsz ? width : realsz; 1045 if ((unsigned)ret + prsize > INT_MAX) { 1046 ret = EOF; 1047 goto error; 1048 } 1049 1050 /* right-adjusting blank padding */ 1051 if ((flags & (LADJUST|ZEROPAD)) == 0) 1052 PAD(width - realsz, blanks); 1053 1054 /* prefix */ 1055 if (sign) { 1056 PRINT(&sign, 1); 1057 } else if (flags & HEXPREFIX) { 1058 ox[0] = '0'; 1059 ox[1] = ch; 1060 PRINT(ox, 2); 1061 } 1062 1063 /* right-adjusting zero padding */ 1064 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1065 PAD(width - realsz, zeroes); 1066 1067 /* leading zeroes from decimal precision */ 1068 PAD(dprec - size, zeroes); 1069 1070 /* the string or number proper */ 1071 #ifdef FLOATING_POINT 1072 if ((flags & FPT) == 0) { 1073 PRINT(cp, size); 1074 } else { /* glue together f_p fragments */ 1075 if (ch >= 'f') { /* 'f' or 'g' */ 1076 if (_double == 0) { 1077 /* kludge for __dtoa irregularity */ 1078 PRINT("0", 1); 1079 if (expt < ndig || (flags & ALT) != 0) { 1080 PRINT(decimal_point, 1); 1081 PAD(ndig - 1, zeroes); 1082 } 1083 } else if (expt <= 0) { 1084 PRINT("0", 1); 1085 PRINT(decimal_point, 1); 1086 PAD(-expt, zeroes); 1087 PRINT(cp, ndig); 1088 } else if (expt >= ndig) { 1089 PRINT(cp, ndig); 1090 PAD(expt - ndig, zeroes); 1091 if (flags & ALT) 1092 PRINT(decimal_point, 1); 1093 } else { 1094 PRINT(cp, expt); 1095 cp += expt; 1096 PRINT(decimal_point, 1); 1097 PRINT(cp, ndig-expt); 1098 } 1099 } else { /* 'e' or 'E' */ 1100 if (ndig > 1 || flags & ALT) { 1101 ox[0] = *cp++; 1102 ox[1] = *decimal_point; 1103 PRINT(ox, 2); 1104 if (_double) { 1105 PRINT(cp, ndig-1); 1106 } else /* 0.[0..] */ 1107 /* __dtoa irregularity */ 1108 PAD(ndig - 1, zeroes); 1109 } else /* XeYYY */ 1110 PRINT(cp, 1); 1111 PRINT(expstr, expsize); 1112 } 1113 } 1114 #else 1115 PRINT(cp, size); 1116 #endif 1117 /* left-adjusting padding (always blank) */ 1118 if (flags & LADJUST) 1119 PAD(width - realsz, blanks); 1120 1121 /* finally, adjust ret */ 1122 ret += prsize; 1123 1124 FLUSH(); /* copy out the I/O vectors */ 1125 } 1126 done: 1127 FLUSH(); 1128 error: 1129 #ifdef FLOATING_POINT 1130 if (dtoaresult != NULL) 1131 free(dtoaresult); 1132 #endif 1133 if (convbuf != NULL) 1134 free(convbuf); 1135 if (__sferror(fp)) 1136 ret = EOF; 1137 if ((argtable != NULL) && (argtable != statargtable)) 1138 free (argtable); 1139 return (ret); 1140 /* NOTREACHED */ 1141 } 1142 1143 /* 1144 * Find all arguments when a positional parameter is encountered. Returns a 1145 * table, indexed by argument number, of pointers to each arguments. The 1146 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1147 * It will be replaces with a malloc-ed one if it overflows. 1148 */ 1149 static void 1150 __find_arguments (const char *fmt0, va_list ap, union arg **argtable) 1151 { 1152 char *fmt; /* format string */ 1153 int ch; /* character from fmt */ 1154 int n, n2; /* handy integer (short term usage) */ 1155 char *cp; /* handy char pointer (short term usage) */ 1156 int flags; /* flags as above */ 1157 int width; /* width from format (%8d), or 0 */ 1158 enum typeid *typetable; /* table of types */ 1159 enum typeid stattypetable [STATIC_ARG_TBL_SIZE]; 1160 int tablesize; /* current size of type table */ 1161 int tablemax; /* largest used index in table */ 1162 int nextarg; /* 1-based argument index */ 1163 1164 /* 1165 * Add an argument type to the table, expanding if necessary. 1166 */ 1167 #define ADDTYPE(type) \ 1168 ((nextarg >= tablesize) ? \ 1169 __grow_type_table(nextarg, &typetable, &tablesize) : 0, \ 1170 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1171 typetable[nextarg++] = type) 1172 1173 #define ADDSARG() \ 1174 ((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \ 1175 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \ 1176 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \ 1177 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1178 ((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT)))))) 1179 1180 #define ADDUARG() \ 1181 ((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \ 1182 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \ 1183 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \ 1184 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1185 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT)))))) 1186 1187 /* 1188 * Add * arguments to the type array. 1189 */ 1190 #define ADDASTER() \ 1191 n2 = 0; \ 1192 cp = fmt; \ 1193 while (is_digit(*cp)) { \ 1194 n2 = 10 * n2 + to_digit(*cp); \ 1195 cp++; \ 1196 } \ 1197 if (*cp == '$') { \ 1198 int hold = nextarg; \ 1199 nextarg = n2; \ 1200 ADDTYPE (T_INT); \ 1201 nextarg = hold; \ 1202 fmt = ++cp; \ 1203 } else { \ 1204 ADDTYPE (T_INT); \ 1205 } 1206 fmt = (char *)fmt0; 1207 typetable = stattypetable; 1208 tablesize = STATIC_ARG_TBL_SIZE; 1209 tablemax = 0; 1210 nextarg = 1; 1211 memset (typetable, T_UNUSED, STATIC_ARG_TBL_SIZE); 1212 1213 /* 1214 * Scan the format for conversions (`%' character). 1215 */ 1216 for (;;) { 1217 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1218 /* void */; 1219 if (ch == '\0') 1220 goto done; 1221 fmt++; /* skip over '%' */ 1222 1223 flags = 0; 1224 width = 0; 1225 1226 rflag: ch = *fmt++; 1227 reswitch: switch (ch) { 1228 case ' ': 1229 case '#': 1230 goto rflag; 1231 case '*': 1232 ADDASTER (); 1233 goto rflag; 1234 case '-': 1235 case '+': 1236 case '\'': 1237 goto rflag; 1238 case '.': 1239 if ((ch = *fmt++) == '*') { 1240 ADDASTER (); 1241 goto rflag; 1242 } 1243 while (is_digit(ch)) { 1244 ch = *fmt++; 1245 } 1246 goto reswitch; 1247 case '0': 1248 goto rflag; 1249 case '1': case '2': case '3': case '4': 1250 case '5': case '6': case '7': case '8': case '9': 1251 n = 0; 1252 do { 1253 n = 10 * n + to_digit(ch); 1254 ch = *fmt++; 1255 } while (is_digit(ch)); 1256 if (ch == '$') { 1257 nextarg = n; 1258 goto rflag; 1259 } 1260 width = n; 1261 goto reswitch; 1262 #ifdef FLOATING_POINT 1263 case 'L': 1264 flags |= LONGDBL; 1265 goto rflag; 1266 #endif 1267 case 'h': 1268 if (flags & SHORTINT) { 1269 flags &= ~SHORTINT; 1270 flags |= CHARINT; 1271 } else 1272 flags |= SHORTINT; 1273 goto rflag; 1274 case 'j': 1275 flags |= INTMAXT; 1276 goto rflag; 1277 case 'l': 1278 if (flags & LONGINT) { 1279 flags &= ~LONGINT; 1280 flags |= LLONGINT; 1281 } else 1282 flags |= LONGINT; 1283 goto rflag; 1284 case 'q': 1285 flags |= LLONGINT; /* not necessarily */ 1286 goto rflag; 1287 case 't': 1288 flags |= PTRDIFFT; 1289 goto rflag; 1290 case 'z': 1291 flags |= SIZET; 1292 goto rflag; 1293 case 'c': 1294 if (flags & LONGINT) 1295 ADDTYPE(T_WINT); 1296 else 1297 ADDTYPE(T_INT); 1298 break; 1299 case 'D': 1300 flags |= LONGINT; 1301 /*FALLTHROUGH*/ 1302 case 'd': 1303 case 'i': 1304 ADDSARG(); 1305 break; 1306 #ifdef FLOATING_POINT 1307 #ifdef HEXFLOAT 1308 case 'a': 1309 case 'A': 1310 #endif 1311 case 'e': 1312 case 'E': 1313 case 'f': 1314 case 'g': 1315 case 'G': 1316 if (flags & LONGDBL) 1317 ADDTYPE(T_LONG_DOUBLE); 1318 else 1319 ADDTYPE(T_DOUBLE); 1320 break; 1321 #endif /* FLOATING_POINT */ 1322 case 'n': 1323 if (flags & INTMAXT) 1324 ADDTYPE(TP_INTMAXT); 1325 else if (flags & PTRDIFFT) 1326 ADDTYPE(TP_PTRDIFFT); 1327 else if (flags & SIZET) 1328 ADDTYPE(TP_SIZET); 1329 else if (flags & LLONGINT) 1330 ADDTYPE(TP_LLONG); 1331 else if (flags & LONGINT) 1332 ADDTYPE(TP_LONG); 1333 else if (flags & SHORTINT) 1334 ADDTYPE(TP_SHORT); 1335 else if (flags & CHARINT) 1336 ADDTYPE(TP_SCHAR); 1337 else 1338 ADDTYPE(TP_INT); 1339 continue; /* no output */ 1340 case 'O': 1341 flags |= LONGINT; 1342 /*FALLTHROUGH*/ 1343 case 'o': 1344 ADDUARG(); 1345 break; 1346 case 'p': 1347 ADDTYPE(TP_VOID); 1348 break; 1349 case 's': 1350 if (flags & LONGINT) 1351 ADDTYPE(TP_WCHAR); 1352 else 1353 ADDTYPE(TP_CHAR); 1354 break; 1355 case 'U': 1356 flags |= LONGINT; 1357 /*FALLTHROUGH*/ 1358 case 'u': 1359 case 'X': 1360 case 'x': 1361 ADDUARG(); 1362 break; 1363 default: /* "%?" prints ?, unless ? is NUL */ 1364 if (ch == '\0') 1365 goto done; 1366 break; 1367 } 1368 } 1369 done: 1370 /* 1371 * Build the argument table. 1372 */ 1373 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1374 *argtable = (union arg *) 1375 malloc (sizeof (union arg) * (tablemax + 1)); 1376 } 1377 1378 (*argtable) [0].intarg = 0; 1379 for (n = 1; n <= tablemax; n++) { 1380 switch (typetable [n]) { 1381 case T_UNUSED: /* whoops! */ 1382 (*argtable) [n].intarg = va_arg (ap, int); 1383 break; 1384 case TP_SCHAR: 1385 (*argtable) [n].pschararg = va_arg (ap, signed char *); 1386 break; 1387 case TP_SHORT: 1388 (*argtable) [n].pshortarg = va_arg (ap, short *); 1389 break; 1390 case T_INT: 1391 (*argtable) [n].intarg = va_arg (ap, int); 1392 break; 1393 case T_U_INT: 1394 (*argtable) [n].uintarg = va_arg (ap, unsigned int); 1395 break; 1396 case TP_INT: 1397 (*argtable) [n].pintarg = va_arg (ap, int *); 1398 break; 1399 case T_LONG: 1400 (*argtable) [n].longarg = va_arg (ap, long); 1401 break; 1402 case T_U_LONG: 1403 (*argtable) [n].ulongarg = va_arg (ap, unsigned long); 1404 break; 1405 case TP_LONG: 1406 (*argtable) [n].plongarg = va_arg (ap, long *); 1407 break; 1408 case T_LLONG: 1409 (*argtable) [n].longlongarg = va_arg (ap, long long); 1410 break; 1411 case T_U_LLONG: 1412 (*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long); 1413 break; 1414 case TP_LLONG: 1415 (*argtable) [n].plonglongarg = va_arg (ap, long long *); 1416 break; 1417 case T_PTRDIFFT: 1418 (*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t); 1419 break; 1420 case TP_PTRDIFFT: 1421 (*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *); 1422 break; 1423 case T_SIZET: 1424 (*argtable) [n].sizearg = va_arg (ap, size_t); 1425 break; 1426 case TP_SIZET: 1427 (*argtable) [n].psizearg = va_arg (ap, ssize_t *); 1428 break; 1429 case T_INTMAXT: 1430 (*argtable) [n].intmaxarg = va_arg (ap, intmax_t); 1431 break; 1432 case T_UINTMAXT: 1433 (*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t); 1434 break; 1435 case TP_INTMAXT: 1436 (*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *); 1437 break; 1438 #ifdef FLOATING_POINT 1439 case T_DOUBLE: 1440 (*argtable) [n].doublearg = va_arg (ap, double); 1441 break; 1442 case T_LONG_DOUBLE: 1443 (*argtable) [n].longdoublearg = va_arg (ap, long double); 1444 break; 1445 #endif 1446 case TP_CHAR: 1447 (*argtable) [n].pchararg = va_arg (ap, char *); 1448 break; 1449 case TP_VOID: 1450 (*argtable) [n].pvoidarg = va_arg (ap, void *); 1451 break; 1452 case T_WINT: 1453 (*argtable) [n].wintarg = va_arg (ap, wint_t); 1454 break; 1455 case TP_WCHAR: 1456 (*argtable) [n].pwchararg = va_arg (ap, wchar_t *); 1457 break; 1458 } 1459 } 1460 1461 if ((typetable != NULL) && (typetable != stattypetable)) 1462 free (typetable); 1463 } 1464 1465 /* 1466 * Increase the size of the type table. 1467 */ 1468 static void 1469 __grow_type_table (int nextarg, enum typeid **typetable, int *tablesize) 1470 { 1471 enum typeid *const oldtable = *typetable; 1472 const int oldsize = *tablesize; 1473 enum typeid *newtable; 1474 int newsize = oldsize * 2; 1475 1476 if (newsize < nextarg + 1) 1477 newsize = nextarg + 1; 1478 if (oldsize == STATIC_ARG_TBL_SIZE) { 1479 if ((newtable = malloc(newsize)) == NULL) 1480 abort(); /* XXX handle better */ 1481 bcopy(oldtable, newtable, oldsize); 1482 } else { 1483 if ((newtable = reallocf(oldtable, newsize)) == NULL) 1484 abort(); /* XXX handle better */ 1485 } 1486 memset(&newtable[oldsize], T_UNUSED, newsize - oldsize); 1487 1488 *typetable = newtable; 1489 *tablesize = newsize; 1490 } 1491 1492 1493 #ifdef FLOATING_POINT 1494 1495 extern char *__dtoa(double, int, int, int *, int *, char **, char **); 1496 1497 static char * 1498 cvt(double value, int ndigits, int flags, char *sign, int *decpt, 1499 int ch, int *length, char **dtoaresultp) 1500 { 1501 int mode, dsgn; 1502 char *digits, *bp, *rve; 1503 1504 if (ch == 'f') 1505 mode = 3; /* ndigits after the decimal point */ 1506 else { 1507 /* 1508 * To obtain ndigits after the decimal point for the 'e' 1509 * and 'E' formats, round to ndigits + 1 significant 1510 * figures. 1511 */ 1512 if (ch == 'e' || ch == 'E') 1513 ndigits++; 1514 mode = 2; /* ndigits significant digits */ 1515 } 1516 digits = __dtoa(value, mode, ndigits, decpt, &dsgn, &rve, dtoaresultp); 1517 *sign = dsgn != 0; 1518 if ((ch != 'g' && ch != 'G') || flags & ALT) { 1519 /* print trailing zeros */ 1520 bp = digits + ndigits; 1521 if (ch == 'f') { 1522 if (*digits == '0' && value) 1523 *decpt = -ndigits + 1; 1524 bp += *decpt; 1525 } 1526 if (value == 0) /* kludge for __dtoa irregularity */ 1527 rve = bp; 1528 while (rve < bp) 1529 *rve++ = '0'; 1530 } 1531 *length = rve - digits; 1532 return (digits); 1533 } 1534 1535 static int 1536 exponent(char *p0, int exp, int fmtch) 1537 { 1538 char *p, *t; 1539 char expbuf[MAXEXP]; 1540 1541 p = p0; 1542 *p++ = fmtch; 1543 if (exp < 0) { 1544 exp = -exp; 1545 *p++ = '-'; 1546 } 1547 else 1548 *p++ = '+'; 1549 t = expbuf + MAXEXP; 1550 if (exp > 9) { 1551 do { 1552 *--t = to_char(exp % 10); 1553 } while ((exp /= 10) > 9); 1554 *--t = to_char(exp); 1555 for (; t < expbuf + MAXEXP; *p++ = *t++); 1556 } 1557 else { 1558 *p++ = '0'; 1559 *p++ = to_char(exp); 1560 } 1561 return (p - p0); 1562 } 1563 #endif /* FLOATING_POINT */ 1564