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. ``prec'' specifies the maximum number of bytes 335 * to output. If ``prec'' is greater than or equal to zero, we can't assume 336 * that the wide char. string ends in a null character. 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, *mbp; 346 size_t clen, nbytes; 347 348 /* 349 * Determine the number of bytes to output and allocate space for 350 * the output. 351 */ 352 if (prec >= 0) { 353 nbytes = 0; 354 p = wcsarg; 355 mbs = initial; 356 for (;;) { 357 clen = wcrtomb(buf, *p++, &mbs); 358 if (clen == 0 || clen == (size_t)-1 || 359 nbytes + clen > prec) 360 break; 361 nbytes += clen; 362 } 363 } else { 364 p = wcsarg; 365 mbs = initial; 366 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs); 367 if (nbytes == (size_t)-1) 368 return (NULL); 369 } 370 if ((convbuf = malloc(nbytes + 1)) == NULL) 371 return (NULL); 372 373 /* 374 * Fill the output buffer with the multibyte representations of as 375 * many wide characters as will fit. 376 */ 377 mbp = convbuf; 378 p = wcsarg; 379 mbs = initial; 380 while (mbp - convbuf < nbytes) { 381 clen = wcrtomb(mbp, *p++, &mbs); 382 if (clen == 0 || clen == (size_t)-1) 383 break; 384 mbp += clen; 385 } 386 if (clen == (size_t)-1) { 387 free(convbuf); 388 return (NULL); 389 } 390 *mbp = '\0'; 391 392 return (convbuf); 393 } 394 395 /* 396 * MT-safe version 397 */ 398 int 399 vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap) 400 401 { 402 int ret; 403 404 FLOCKFILE(fp); 405 ret = __vfprintf(fp, fmt0, ap); 406 FUNLOCKFILE(fp); 407 return (ret); 408 } 409 410 #ifndef NO_FLOATING_POINT 411 412 #define dtoa __dtoa 413 #define freedtoa __freedtoa 414 415 #include <float.h> 416 #include <math.h> 417 #include "floatio.h" 418 #include "gdtoa.h" 419 420 #define DEFPREC 6 421 422 static int exponent(char *, int, int); 423 424 #endif /* !NO_FLOATING_POINT */ 425 426 /* 427 * The size of the buffer we use as scratch space for integer 428 * conversions, among other things. Technically, we would need the 429 * most space for base 10 conversions with thousands' grouping 430 * characters between each pair of digits. 100 bytes is a 431 * conservative overestimate even for a 128-bit uintmax_t. 432 */ 433 #define BUF 100 434 435 #define STATIC_ARG_TBL_SIZE 8 /* Size of static argument table. */ 436 437 /* 438 * Flags used during conversion. 439 */ 440 #define ALT 0x001 /* alternate form */ 441 #define LADJUST 0x004 /* left adjustment */ 442 #define LONGDBL 0x008 /* long double */ 443 #define LONGINT 0x010 /* long integer */ 444 #define LLONGINT 0x020 /* long long integer */ 445 #define SHORTINT 0x040 /* short integer */ 446 #define ZEROPAD 0x080 /* zero (as opposed to blank) pad */ 447 #define FPT 0x100 /* Floating point number */ 448 #define GROUPING 0x200 /* use grouping ("'" flag) */ 449 /* C99 additional size modifiers: */ 450 #define SIZET 0x400 /* size_t */ 451 #define PTRDIFFT 0x800 /* ptrdiff_t */ 452 #define INTMAXT 0x1000 /* intmax_t */ 453 #define CHARINT 0x2000 /* print char using int format */ 454 455 /* 456 * Non-MT-safe version 457 */ 458 int 459 __vfprintf(FILE *fp, const char *fmt0, va_list ap) 460 { 461 char *fmt; /* format string */ 462 int ch; /* character from fmt */ 463 int n, n2; /* handy integer (short term usage) */ 464 char *cp; /* handy char pointer (short term usage) */ 465 struct __siov *iovp; /* for PRINT macro */ 466 int flags; /* flags as above */ 467 int ret; /* return value accumulator */ 468 int width; /* width from format (%8d), or 0 */ 469 int prec; /* precision from format; <0 for N/A */ 470 char sign; /* sign prefix (' ', '+', '-', or \0) */ 471 char thousands_sep; /* locale specific thousands separator */ 472 const char *grouping; /* locale specific numeric grouping rules */ 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 break; 913 } 914 flags |= FPT; 915 ndig = dtoaend - cp; 916 if (ch == 'g' || ch == 'G') { 917 if (expt > -4 && expt <= prec) { 918 /* Make %[gG] smell like %[fF] */ 919 expchar = '\0'; 920 if (flags & ALT) 921 prec -= expt; 922 else 923 prec = ndig - expt; 924 if (prec < 0) 925 prec = 0; 926 } else { 927 /* 928 * Make %[gG] smell like %[eE], but 929 * trim trailing zeroes if no # flag. 930 */ 931 if (!(flags & ALT)) 932 prec = ndig; 933 } 934 } 935 if (expchar) { 936 expsize = exponent(expstr, expt - 1, expchar); 937 size = expsize + prec; 938 if (prec > 1 || flags & ALT) 939 ++size; 940 } else { 941 /* space for digits before decimal point */ 942 if (expt > 0) 943 size = expt; 944 else /* "0" */ 945 size = 1; 946 /* space for decimal pt and following digits */ 947 if (prec || flags & ALT) 948 size += prec + 1; 949 if (grouping && expt > 0) { 950 /* space for thousands' grouping */ 951 nseps = nrepeats = 0; 952 lead = expt; 953 while (*grouping != CHAR_MAX) { 954 if (lead <= *grouping) 955 break; 956 lead -= *grouping; 957 if (*(grouping+1)) { 958 nseps++; 959 grouping++; 960 } else 961 nrepeats++; 962 } 963 size += nseps + nrepeats; 964 } else 965 lead = expt; 966 } 967 break; 968 #endif /* !NO_FLOATING_POINT */ 969 case 'n': 970 /* 971 * Assignment-like behavior is specified if the 972 * value overflows or is otherwise unrepresentable. 973 * C99 says to use `signed char' for %hhn conversions. 974 */ 975 if (flags & LLONGINT) 976 *GETARG(long long *) = ret; 977 else if (flags & SIZET) 978 *GETARG(ssize_t *) = (ssize_t)ret; 979 else if (flags & PTRDIFFT) 980 *GETARG(ptrdiff_t *) = ret; 981 else if (flags & INTMAXT) 982 *GETARG(intmax_t *) = ret; 983 else if (flags & LONGINT) 984 *GETARG(long *) = ret; 985 else if (flags & SHORTINT) 986 *GETARG(short *) = ret; 987 else if (flags & CHARINT) 988 *GETARG(signed char *) = ret; 989 else 990 *GETARG(int *) = ret; 991 continue; /* no output */ 992 case 'O': 993 flags |= LONGINT; 994 /*FALLTHROUGH*/ 995 case 'o': 996 if (flags & INTMAX_SIZE) 997 ujval = UJARG(); 998 else 999 ulval = UARG(); 1000 base = 8; 1001 goto nosign; 1002 case 'p': 1003 /*- 1004 * ``The argument shall be a pointer to void. The 1005 * value of the pointer is converted to a sequence 1006 * of printable characters, in an implementation- 1007 * defined manner.'' 1008 * -- ANSI X3J11 1009 */ 1010 ujval = (uintmax_t)(uintptr_t)GETARG(void *); 1011 base = 16; 1012 xdigs = xdigs_lower; 1013 flags = flags | INTMAXT; 1014 ox[1] = 'x'; 1015 goto nosign; 1016 case 'S': 1017 flags |= LONGINT; 1018 /*FALLTHROUGH*/ 1019 case 's': 1020 if (flags & LONGINT) { 1021 wchar_t *wcp; 1022 1023 if (convbuf != NULL) 1024 free(convbuf); 1025 if ((wcp = GETARG(wchar_t *)) == NULL) 1026 cp = "(null)"; 1027 else { 1028 convbuf = __wcsconv(wcp, prec); 1029 if (convbuf == NULL) { 1030 fp->_flags |= __SERR; 1031 goto error; 1032 } 1033 cp = convbuf; 1034 } 1035 } else if ((cp = GETARG(char *)) == NULL) 1036 cp = "(null)"; 1037 if (prec >= 0) { 1038 /* 1039 * can't use strlen; can only look for the 1040 * NUL in the first `prec' characters, and 1041 * strlen() will go further. 1042 */ 1043 char *p = memchr(cp, 0, (size_t)prec); 1044 1045 if (p != NULL) { 1046 size = p - cp; 1047 if (size > prec) 1048 size = prec; 1049 } else 1050 size = prec; 1051 } else 1052 size = strlen(cp); 1053 sign = '\0'; 1054 break; 1055 case 'U': 1056 flags |= LONGINT; 1057 /*FALLTHROUGH*/ 1058 case 'u': 1059 if (flags & INTMAX_SIZE) 1060 ujval = UJARG(); 1061 else 1062 ulval = UARG(); 1063 base = 10; 1064 goto nosign; 1065 case 'X': 1066 xdigs = xdigs_upper; 1067 goto hex; 1068 case 'x': 1069 xdigs = xdigs_lower; 1070 hex: 1071 if (flags & INTMAX_SIZE) 1072 ujval = UJARG(); 1073 else 1074 ulval = UARG(); 1075 base = 16; 1076 /* leading 0x/X only if non-zero */ 1077 if (flags & ALT && 1078 (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0)) 1079 ox[1] = ch; 1080 1081 flags &= ~GROUPING; 1082 /* unsigned conversions */ 1083 nosign: sign = '\0'; 1084 /*- 1085 * ``... diouXx conversions ... if a precision is 1086 * specified, the 0 flag will be ignored.'' 1087 * -- ANSI X3J11 1088 */ 1089 number: if ((dprec = prec) >= 0) 1090 flags &= ~ZEROPAD; 1091 1092 /*- 1093 * ``The result of converting a zero value with an 1094 * explicit precision of zero is no characters.'' 1095 * -- ANSI X3J11 1096 */ 1097 cp = buf + BUF; 1098 if (flags & INTMAX_SIZE) { 1099 if (ujval != 0 || prec != 0) 1100 cp = __ujtoa(ujval, cp, base, 1101 flags & ALT, xdigs, 1102 flags & GROUPING, thousands_sep, 1103 grouping); 1104 } else { 1105 if (ulval != 0 || prec != 0) 1106 cp = __ultoa(ulval, cp, base, 1107 flags & ALT, xdigs, 1108 flags & GROUPING, thousands_sep, 1109 grouping); 1110 } 1111 size = buf + BUF - cp; 1112 if (size > BUF) /* should never happen */ 1113 abort(); 1114 break; 1115 default: /* "%?" prints ?, unless ? is NUL */ 1116 if (ch == '\0') 1117 goto done; 1118 /* pretend it was %c with argument ch */ 1119 cp = buf; 1120 *cp = ch; 1121 size = 1; 1122 sign = '\0'; 1123 break; 1124 } 1125 1126 /* 1127 * All reasonable formats wind up here. At this point, `cp' 1128 * points to a string which (if not flags&LADJUST) should be 1129 * padded out to `width' places. If flags&ZEROPAD, it should 1130 * first be prefixed by any sign or other prefix; otherwise, 1131 * it should be blank padded before the prefix is emitted. 1132 * After any left-hand padding and prefixing, emit zeroes 1133 * required by a decimal [diouxX] precision, then print the 1134 * string proper, then emit zeroes required by any leftover 1135 * floating precision; finally, if LADJUST, pad with blanks. 1136 * 1137 * Compute actual size, so we know how much to pad. 1138 * size excludes decimal prec; realsz includes it. 1139 */ 1140 realsz = dprec > size ? dprec : size; 1141 if (sign) 1142 realsz++; 1143 if (ox[1]) 1144 realsz += 2; 1145 1146 prsize = width > realsz ? width : realsz; 1147 if ((unsigned)ret + prsize > INT_MAX) { 1148 ret = EOF; 1149 goto error; 1150 } 1151 1152 /* right-adjusting blank padding */ 1153 if ((flags & (LADJUST|ZEROPAD)) == 0) 1154 PAD(width - realsz, blanks); 1155 1156 /* prefix */ 1157 if (sign) 1158 PRINT(&sign, 1); 1159 1160 if (ox[1]) { /* ox[1] is either x, X, or \0 */ 1161 ox[0] = '0'; 1162 PRINT(ox, 2); 1163 } 1164 1165 /* right-adjusting zero padding */ 1166 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD) 1167 PAD(width - realsz, zeroes); 1168 1169 /* leading zeroes from decimal precision */ 1170 PAD(dprec - size, zeroes); 1171 1172 /* the string or number proper */ 1173 #ifndef NO_FLOATING_POINT 1174 if ((flags & FPT) == 0) { 1175 PRINT(cp, size); 1176 } else { /* glue together f_p fragments */ 1177 if (!expchar) { /* %[fF] or sufficiently short %[gG] */ 1178 if (expt <= 0) { 1179 PRINT(zeroes, 1); 1180 if (prec || flags & ALT) 1181 PRINT(decimal_point, 1); 1182 PAD(-expt, zeroes); 1183 /* already handled initial 0's */ 1184 prec += expt; 1185 } else { 1186 PRINTANDPAD(cp, dtoaend, lead, zeroes); 1187 cp += lead; 1188 if (grouping) { 1189 while (nseps>0 || nrepeats>0) { 1190 if (nrepeats > 0) 1191 nrepeats--; 1192 else { 1193 grouping--; 1194 nseps--; 1195 } 1196 PRINT(&thousands_sep, 1197 1); 1198 PRINTANDPAD(cp,dtoaend, 1199 *grouping, zeroes); 1200 cp += *grouping; 1201 } 1202 if (cp > dtoaend) 1203 cp = dtoaend; 1204 } 1205 if (prec || flags & ALT) 1206 PRINT(decimal_point,1); 1207 } 1208 PRINTANDPAD(cp, dtoaend, prec, zeroes); 1209 } else { /* %[eE] or sufficiently long %[gG] */ 1210 if (prec > 1 || flags & ALT) { 1211 buf[0] = *cp++; 1212 buf[1] = *decimal_point; 1213 PRINT(buf, 2); 1214 PRINT(cp, ndig-1); 1215 PAD(prec - ndig, zeroes); 1216 } else /* XeYYY */ 1217 PRINT(cp, 1); 1218 PRINT(expstr, expsize); 1219 } 1220 } 1221 #else 1222 PRINT(cp, size); 1223 #endif 1224 /* left-adjusting padding (always blank) */ 1225 if (flags & LADJUST) 1226 PAD(width - realsz, blanks); 1227 1228 /* finally, adjust ret */ 1229 ret += prsize; 1230 1231 FLUSH(); /* copy out the I/O vectors */ 1232 } 1233 done: 1234 FLUSH(); 1235 error: 1236 #ifndef NO_FLOATING_POINT 1237 if (dtoaresult != NULL) 1238 freedtoa(dtoaresult); 1239 #endif 1240 if (convbuf != NULL) 1241 free(convbuf); 1242 if (__sferror(fp)) 1243 ret = EOF; 1244 if ((argtable != NULL) && (argtable != statargtable)) 1245 free (argtable); 1246 return (ret); 1247 /* NOTREACHED */ 1248 } 1249 1250 /* 1251 * Find all arguments when a positional parameter is encountered. Returns a 1252 * table, indexed by argument number, of pointers to each arguments. The 1253 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries. 1254 * It will be replaces with a malloc-ed one if it overflows. 1255 */ 1256 static void 1257 __find_arguments (const char *fmt0, va_list ap, union arg **argtable) 1258 { 1259 char *fmt; /* format string */ 1260 int ch; /* character from fmt */ 1261 int n, n2; /* handy integer (short term usage) */ 1262 char *cp; /* handy char pointer (short term usage) */ 1263 int flags; /* flags as above */ 1264 int width; /* width from format (%8d), or 0 */ 1265 enum typeid *typetable; /* table of types */ 1266 enum typeid stattypetable [STATIC_ARG_TBL_SIZE]; 1267 int tablesize; /* current size of type table */ 1268 int tablemax; /* largest used index in table */ 1269 int nextarg; /* 1-based argument index */ 1270 1271 /* 1272 * Add an argument type to the table, expanding if necessary. 1273 */ 1274 #define ADDTYPE(type) \ 1275 ((nextarg >= tablesize) ? \ 1276 __grow_type_table(nextarg, &typetable, &tablesize) : (void)0, \ 1277 (nextarg > tablemax) ? tablemax = nextarg : 0, \ 1278 typetable[nextarg++] = type) 1279 1280 #define ADDSARG() \ 1281 ((flags&INTMAXT) ? ADDTYPE(T_INTMAXT) : \ 1282 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \ 1283 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \ 1284 ((flags&LLONGINT) ? ADDTYPE(T_LLONG) : \ 1285 ((flags&LONGINT) ? ADDTYPE(T_LONG) : ADDTYPE(T_INT)))))) 1286 1287 #define ADDUARG() \ 1288 ((flags&INTMAXT) ? ADDTYPE(T_UINTMAXT) : \ 1289 ((flags&SIZET) ? ADDTYPE(T_SIZET) : \ 1290 ((flags&PTRDIFFT) ? ADDTYPE(T_PTRDIFFT) : \ 1291 ((flags&LLONGINT) ? ADDTYPE(T_U_LLONG) : \ 1292 ((flags&LONGINT) ? ADDTYPE(T_U_LONG) : ADDTYPE(T_U_INT)))))) 1293 1294 /* 1295 * Add * arguments to the type array. 1296 */ 1297 #define ADDASTER() \ 1298 n2 = 0; \ 1299 cp = fmt; \ 1300 while (is_digit(*cp)) { \ 1301 n2 = 10 * n2 + to_digit(*cp); \ 1302 cp++; \ 1303 } \ 1304 if (*cp == '$') { \ 1305 int hold = nextarg; \ 1306 nextarg = n2; \ 1307 ADDTYPE (T_INT); \ 1308 nextarg = hold; \ 1309 fmt = ++cp; \ 1310 } else { \ 1311 ADDTYPE (T_INT); \ 1312 } 1313 fmt = (char *)fmt0; 1314 typetable = stattypetable; 1315 tablesize = STATIC_ARG_TBL_SIZE; 1316 tablemax = 0; 1317 nextarg = 1; 1318 for (n = 0; n < STATIC_ARG_TBL_SIZE; n++) 1319 typetable[n] = T_UNUSED; 1320 1321 /* 1322 * Scan the format for conversions (`%' character). 1323 */ 1324 for (;;) { 1325 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++) 1326 /* void */; 1327 if (ch == '\0') 1328 goto done; 1329 fmt++; /* skip over '%' */ 1330 1331 flags = 0; 1332 width = 0; 1333 1334 rflag: ch = *fmt++; 1335 reswitch: switch (ch) { 1336 case ' ': 1337 case '#': 1338 goto rflag; 1339 case '*': 1340 ADDASTER (); 1341 goto rflag; 1342 case '-': 1343 case '+': 1344 case '\'': 1345 goto rflag; 1346 case '.': 1347 if ((ch = *fmt++) == '*') { 1348 ADDASTER (); 1349 goto rflag; 1350 } 1351 while (is_digit(ch)) { 1352 ch = *fmt++; 1353 } 1354 goto reswitch; 1355 case '0': 1356 goto rflag; 1357 case '1': case '2': case '3': case '4': 1358 case '5': case '6': case '7': case '8': case '9': 1359 n = 0; 1360 do { 1361 n = 10 * n + to_digit(ch); 1362 ch = *fmt++; 1363 } while (is_digit(ch)); 1364 if (ch == '$') { 1365 nextarg = n; 1366 goto rflag; 1367 } 1368 width = n; 1369 goto reswitch; 1370 #ifndef NO_FLOATING_POINT 1371 case 'L': 1372 flags |= LONGDBL; 1373 goto rflag; 1374 #endif 1375 case 'h': 1376 if (flags & SHORTINT) { 1377 flags &= ~SHORTINT; 1378 flags |= CHARINT; 1379 } else 1380 flags |= SHORTINT; 1381 goto rflag; 1382 case 'j': 1383 flags |= INTMAXT; 1384 goto rflag; 1385 case 'l': 1386 if (flags & LONGINT) { 1387 flags &= ~LONGINT; 1388 flags |= LLONGINT; 1389 } else 1390 flags |= LONGINT; 1391 goto rflag; 1392 case 'q': 1393 flags |= LLONGINT; /* not necessarily */ 1394 goto rflag; 1395 case 't': 1396 flags |= PTRDIFFT; 1397 goto rflag; 1398 case 'z': 1399 flags |= SIZET; 1400 goto rflag; 1401 case 'C': 1402 flags |= LONGINT; 1403 /*FALLTHROUGH*/ 1404 case 'c': 1405 if (flags & LONGINT) 1406 ADDTYPE(T_WINT); 1407 else 1408 ADDTYPE(T_INT); 1409 break; 1410 case 'D': 1411 flags |= LONGINT; 1412 /*FALLTHROUGH*/ 1413 case 'd': 1414 case 'i': 1415 ADDSARG(); 1416 break; 1417 #ifndef NO_FLOATING_POINT 1418 case 'a': 1419 case 'A': 1420 case 'e': 1421 case 'E': 1422 case 'f': 1423 case 'g': 1424 case 'G': 1425 if (flags & LONGDBL) 1426 ADDTYPE(T_LONG_DOUBLE); 1427 else 1428 ADDTYPE(T_DOUBLE); 1429 break; 1430 #endif /* !NO_FLOATING_POINT */ 1431 case 'n': 1432 if (flags & INTMAXT) 1433 ADDTYPE(TP_INTMAXT); 1434 else if (flags & PTRDIFFT) 1435 ADDTYPE(TP_PTRDIFFT); 1436 else if (flags & SIZET) 1437 ADDTYPE(TP_SIZET); 1438 else if (flags & LLONGINT) 1439 ADDTYPE(TP_LLONG); 1440 else if (flags & LONGINT) 1441 ADDTYPE(TP_LONG); 1442 else if (flags & SHORTINT) 1443 ADDTYPE(TP_SHORT); 1444 else if (flags & CHARINT) 1445 ADDTYPE(TP_SCHAR); 1446 else 1447 ADDTYPE(TP_INT); 1448 continue; /* no output */ 1449 case 'O': 1450 flags |= LONGINT; 1451 /*FALLTHROUGH*/ 1452 case 'o': 1453 ADDUARG(); 1454 break; 1455 case 'p': 1456 ADDTYPE(TP_VOID); 1457 break; 1458 case 'S': 1459 flags |= LONGINT; 1460 /*FALLTHROUGH*/ 1461 case 's': 1462 if (flags & LONGINT) 1463 ADDTYPE(TP_WCHAR); 1464 else 1465 ADDTYPE(TP_CHAR); 1466 break; 1467 case 'U': 1468 flags |= LONGINT; 1469 /*FALLTHROUGH*/ 1470 case 'u': 1471 case 'X': 1472 case 'x': 1473 ADDUARG(); 1474 break; 1475 default: /* "%?" prints ?, unless ? is NUL */ 1476 if (ch == '\0') 1477 goto done; 1478 break; 1479 } 1480 } 1481 done: 1482 /* 1483 * Build the argument table. 1484 */ 1485 if (tablemax >= STATIC_ARG_TBL_SIZE) { 1486 *argtable = (union arg *) 1487 malloc (sizeof (union arg) * (tablemax + 1)); 1488 } 1489 1490 (*argtable) [0].intarg = 0; 1491 for (n = 1; n <= tablemax; n++) { 1492 switch (typetable [n]) { 1493 case T_UNUSED: /* whoops! */ 1494 (*argtable) [n].intarg = va_arg (ap, int); 1495 break; 1496 case TP_SCHAR: 1497 (*argtable) [n].pschararg = va_arg (ap, signed char *); 1498 break; 1499 case TP_SHORT: 1500 (*argtable) [n].pshortarg = va_arg (ap, short *); 1501 break; 1502 case T_INT: 1503 (*argtable) [n].intarg = va_arg (ap, int); 1504 break; 1505 case T_U_INT: 1506 (*argtable) [n].uintarg = va_arg (ap, unsigned int); 1507 break; 1508 case TP_INT: 1509 (*argtable) [n].pintarg = va_arg (ap, int *); 1510 break; 1511 case T_LONG: 1512 (*argtable) [n].longarg = va_arg (ap, long); 1513 break; 1514 case T_U_LONG: 1515 (*argtable) [n].ulongarg = va_arg (ap, unsigned long); 1516 break; 1517 case TP_LONG: 1518 (*argtable) [n].plongarg = va_arg (ap, long *); 1519 break; 1520 case T_LLONG: 1521 (*argtable) [n].longlongarg = va_arg (ap, long long); 1522 break; 1523 case T_U_LLONG: 1524 (*argtable) [n].ulonglongarg = va_arg (ap, unsigned long long); 1525 break; 1526 case TP_LLONG: 1527 (*argtable) [n].plonglongarg = va_arg (ap, long long *); 1528 break; 1529 case T_PTRDIFFT: 1530 (*argtable) [n].ptrdiffarg = va_arg (ap, ptrdiff_t); 1531 break; 1532 case TP_PTRDIFFT: 1533 (*argtable) [n].pptrdiffarg = va_arg (ap, ptrdiff_t *); 1534 break; 1535 case T_SIZET: 1536 (*argtable) [n].sizearg = va_arg (ap, size_t); 1537 break; 1538 case TP_SIZET: 1539 (*argtable) [n].psizearg = va_arg (ap, ssize_t *); 1540 break; 1541 case T_INTMAXT: 1542 (*argtable) [n].intmaxarg = va_arg (ap, intmax_t); 1543 break; 1544 case T_UINTMAXT: 1545 (*argtable) [n].uintmaxarg = va_arg (ap, uintmax_t); 1546 break; 1547 case TP_INTMAXT: 1548 (*argtable) [n].pintmaxarg = va_arg (ap, intmax_t *); 1549 break; 1550 #ifndef NO_FLOATING_POINT 1551 case T_DOUBLE: 1552 (*argtable) [n].doublearg = va_arg (ap, double); 1553 break; 1554 case T_LONG_DOUBLE: 1555 (*argtable) [n].longdoublearg = va_arg (ap, long double); 1556 break; 1557 #endif 1558 case TP_CHAR: 1559 (*argtable) [n].pchararg = va_arg (ap, char *); 1560 break; 1561 case TP_VOID: 1562 (*argtable) [n].pvoidarg = va_arg (ap, void *); 1563 break; 1564 case T_WINT: 1565 (*argtable) [n].wintarg = va_arg (ap, wint_t); 1566 break; 1567 case TP_WCHAR: 1568 (*argtable) [n].pwchararg = va_arg (ap, wchar_t *); 1569 break; 1570 } 1571 } 1572 1573 if ((typetable != NULL) && (typetable != stattypetable)) 1574 free (typetable); 1575 } 1576 1577 /* 1578 * Increase the size of the type table. 1579 */ 1580 static void 1581 __grow_type_table (int nextarg, enum typeid **typetable, int *tablesize) 1582 { 1583 enum typeid *const oldtable = *typetable; 1584 const int oldsize = *tablesize; 1585 enum typeid *newtable; 1586 int n, newsize = oldsize * 2; 1587 1588 if (newsize < nextarg + 1) 1589 newsize = nextarg + 1; 1590 if (oldsize == STATIC_ARG_TBL_SIZE) { 1591 if ((newtable = malloc(newsize * sizeof(enum typeid))) == NULL) 1592 abort(); /* XXX handle better */ 1593 bcopy(oldtable, newtable, oldsize * sizeof(enum typeid)); 1594 } else { 1595 newtable = reallocf(oldtable, newsize * sizeof(enum typeid)); 1596 if (newtable == NULL) 1597 abort(); /* XXX handle better */ 1598 } 1599 for (n = oldsize; n < newsize; n++) 1600 newtable[n] = T_UNUSED; 1601 1602 *typetable = newtable; 1603 *tablesize = newsize; 1604 } 1605 1606 1607 #ifndef NO_FLOATING_POINT 1608 1609 static int 1610 exponent(char *p0, int exp, int fmtch) 1611 { 1612 char *p, *t; 1613 char expbuf[MAXEXPDIG]; 1614 1615 p = p0; 1616 *p++ = fmtch; 1617 if (exp < 0) { 1618 exp = -exp; 1619 *p++ = '-'; 1620 } 1621 else 1622 *p++ = '+'; 1623 t = expbuf + MAXEXPDIG; 1624 if (exp > 9) { 1625 do { 1626 *--t = to_char(exp % 10); 1627 } while ((exp /= 10) > 9); 1628 *--t = to_char(exp); 1629 for (; t < expbuf + MAXEXPDIG; *p++ = *t++); 1630 } 1631 else { 1632 /* 1633 * Exponents for decimal floating point conversions 1634 * (%[eEgG]) must be at least two characters long, 1635 * whereas exponents for hexadecimal conversions can 1636 * be only one character long. 1637 */ 1638 if (fmtch == 'e' || fmtch == 'E') 1639 *p++ = '0'; 1640 *p++ = to_char(exp); 1641 } 1642 return (p - p0); 1643 } 1644 #endif /* !NO_FLOATING_POINT */ 1645