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