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