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