lib/libc/stdio/vfwprintf.c

   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  * @(#)vfprintf.c       8.1 (Berkeley) 6/4/93
  33  * $FreeBSD: src/lib/libc/stdio/vfwprintf.c,v 1.41 2009/02/28 06:06:57 das Exp $
  34  * $DragonFly: src/lib/libc/stdio/vfwprintf.c,v 1.3 2006/03/02 18:05:30 joerg Exp $
  35  */
  36
  37 /*
  38  * Actual wprintf innards.
  39  *
  40  * Avoid making gratuitous changes to this source file; it should be kept
  41  * as close as possible to vfprintf.c for ease of maintenance.
  42  */
  43
  44 #include "namespace.h"
  45 #include <sys/types.h>
  46
  47 #include <ctype.h>
  48 #include <limits.h>
  49 #include <locale.h>
  50 #include <stdarg.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 <wctype.h>
  58 #include "un-namespace.h"
  59
  60 #include "libc_private.h"
  61 #include "local.h"
  62 #include "priv_stdio.h"
  63 #include "printflocal.h"
  64
  65 static int      __sprint(FILE *, struct __suio *);
  66 static int      __sbprintf(FILE *, const wchar_t *, va_list) __noinline;
  67 static wint_t   __xfputwc(wchar_t, FILE *);
  68 static wchar_t  *__mbsconv(char *, int);
  69
  70 #define CHAR    wchar_t
  71 #include "printfcommon.h"
  72
  73 struct grouping_state {
  74         wchar_t thousands_sep;  /* locale-specific thousands separator */
  75         const char *grouping;   /* locale-specific numeric grouping rules */
  76         int lead;               /* sig figs before decimal or group sep */
  77         int nseps;              /* number of group separators with ' */
  78         int nrepeats;           /* number of repeats of the last group */
  79 };
  80
  81 static const mbstate_t initial_mbs;
  82
  83 static inline wchar_t
  84 get_decpt(void)
  85 {
  86         mbstate_t mbs;
  87         wchar_t decpt;
  88         int nconv;
  89
  90         mbs = initial_mbs;
  91         nconv = mbrtowc(&decpt, localeconv()->decimal_point, MB_CUR_MAX, &mbs);
  92         if (nconv == (size_t)-1 || nconv == (size_t)-2)
  93                 decpt = '.';    /* failsafe */
  94         return (decpt);
  95 }
  96
  97 static inline wchar_t
  98 get_thousep(void)
  99 {
 100         mbstate_t mbs;
 101         wchar_t thousep;
 102         int nconv;
 103
 104         mbs = initial_mbs;
 105         nconv = mbrtowc(&thousep, localeconv()->thousands_sep,
 106             MB_CUR_MAX, &mbs);
 107         if (nconv == (size_t)-1 || nconv == (size_t)-2)
 108                 thousep = '\0';    /* failsafe */
 109         return (thousep);
 110 }
 111
 112 /*
 113  * Initialize the thousands' grouping state in preparation to print a
 114  * number with ndigits digits. This routine returns the total number
 115  * of wide characters that will be printed.
 116  */
 117 static int
 118 grouping_init(struct grouping_state *gs, int ndigits)
 119 {
 120
 121         gs->grouping = localeconv()->grouping;
 122         gs->thousands_sep = get_thousep();
 123
 124         gs->nseps = gs->nrepeats = 0;
 125         gs->lead = ndigits;
 126         while (*gs->grouping != CHAR_MAX) {
 127                 if (gs->lead <= *gs->grouping)
 128                         break;
 129                 gs->lead -= *gs->grouping;
 130                 if (*(gs->grouping+1)) {
 131                         gs->nseps++;
 132                         gs->grouping++;
 133                 } else
 134                         gs->nrepeats++;
 135         }
 136         return (gs->nseps + gs->nrepeats);
 137 }
 138
 139 /*
 140  * Print a number with thousands' separators.
 141  */
 142 static int
 143 grouping_print(struct grouping_state *gs, struct io_state *iop,
 144                const CHAR *cp, const CHAR *ep)
 145 {
 146         const CHAR *cp0 = cp;
 147
 148         if (io_printandpad(iop, cp, ep, gs->lead, zeroes))
 149                 return (-1);
 150         cp += gs->lead;
 151         while (gs->nseps > 0 || gs->nrepeats > 0) {
 152                 if (gs->nrepeats > 0)
 153                         gs->nrepeats--;
 154                 else {
 155                         gs->grouping--;
 156                         gs->nseps--;
 157                 }
 158                 if (io_print(iop, &gs->thousands_sep, 1))
 159                         return (-1);
 160                 if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes))
 161                         return (-1);
 162                 cp += *gs->grouping;
 163         }
 164         if (cp > ep)
 165                 cp = ep;
 166         return (cp - cp0);
 167 }
 168
 169
 170 /*
 171  * Flush out all the vectors defined by the given uio,
 172  * then reset it so that it can be reused.
 173  *
 174  * XXX The fact that we do this a character at a time and convert to a
 175  * multibyte character sequence even if the destination is a wide
 176  * string eclipses the benefits of buffering.
 177  */
 178 static int
 179 __sprint(FILE *fp, struct __suio *uio)
 180 {
 181         struct __siov *iov;
 182         wchar_t *p;
 183         int i, len;
 184
 185         iov = uio->uio_iov;
 186         for (; uio->uio_resid != 0; uio->uio_resid -= len, iov++) {
 187                 p = (wchar_t *)iov->iov_base;
 188                 len = iov->iov_len;
 189                 for (i = 0; i < len; i++) {
 190                         if (__xfputwc(p[i], fp) == WEOF)
 191                                 return (-1);
 192                 }
 193         }
 194         uio->uio_iovcnt = 0;
 195         return (0);
 196 }
 197
 198 /*
 199  * Helper function for `fprintf to unbuffered unix file': creates a
 200  * temporary buffer.  We only work on write-only files; this avoids
 201  * worries about ungetc buffers and so forth.
 202  */
 203 static int
 204 __sbprintf(FILE *fp, const wchar_t *fmt, va_list ap)
 205 {
 206         int ret;
 207         FILE fake;
 208         unsigned char buf[BUFSIZ];
 209
 210         /* XXX This is probably not needed. */
 211         if (prepwrite(fp) != 0)
 212                 return (EOF);
 213
 214         /* copy the important variables */
 215         fake.pub._flags = fp->pub._flags & ~__SNBF;
 216         fake.pub._fileno = fp->pub._fileno;
 217         fake._cookie = fp->_cookie;
 218         fake._write = fp->_write;
 219         memcpy(WCIO_GET(&fake), WCIO_GET(fp), sizeof(struct wchar_io_data));
 220
 221         /* set up the buffer */
 222         fake._bf._base = fake.pub._p = buf;
 223         fake._bf._size = fake.pub._w = sizeof(buf);
 224         fake.pub._lbfsize = 0;  /* not actually used, but Just In Case */
 225
 226         /* do the work, then copy any error status */
 227         ret = __vfwprintf(&fake, fmt, ap);
 228         if (ret >= 0 && __fflush(&fake))
 229                 ret = WEOF;
 230         if (fake.pub._flags & __SERR)
 231                 fp->pub._flags |= __SERR;
 232         return (ret);
 233 }
 234
 235 /*
 236  * Like __fputwc, but handles fake string (__SSTR) files properly.
 237  * File must already be locked.
 238  */
 239 static wint_t
 240 __xfputwc(wchar_t wc, FILE *fp)
 241 {
 242         mbstate_t mbs;
 243         char buf[MB_LEN_MAX];
 244         struct __suio uio;
 245         struct __siov iov;
 246         size_t len;
 247
 248         if ((fp->pub._flags & __SSTR) == 0)
 249                 return (__fputwc_unlock(wc, fp));
 250
 251         mbs = initial_mbs;
 252         if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1) {
 253                 fp->pub._flags |= __SERR;
 254                 return (WEOF);
 255         }
 256         uio.uio_iov = &iov;
 257         uio.uio_resid = len;
 258         uio.uio_iovcnt = 1;
 259         iov.iov_base = buf;
 260         iov.iov_len = len;
 261         return (__sfvwrite(fp, &uio) != EOF ? (wint_t)wc : WEOF);
 262 }
 263
 264 /*
 265  * Convert a multibyte character string argument for the %s format to a wide
 266  * string representation. ``prec'' specifies the maximum number of bytes
 267  * to output. If ``prec'' is greater than or equal to zero, we can't assume
 268  * that the multibyte char. string ends in a null character.
 269  */
 270 static wchar_t *
 271 __mbsconv(char *mbsarg, int prec)
 272 {
 273         mbstate_t mbs;
 274         wchar_t *convbuf, *wcp;
 275         const char *p;
 276         size_t insize, nchars, nconv;
 277
 278         if (mbsarg == NULL)
 279                 return (NULL);
 280
 281         /*
 282          * Supplied argument is a multibyte string; convert it to wide
 283          * characters first.
 284          */
 285         if (prec >= 0) {
 286                 /*
 287                  * String is not guaranteed to be NUL-terminated. Find the
 288                  * number of characters to print.
 289                  */
 290                 p = mbsarg;
 291                 insize = nchars = 0;
 292                 mbs = initial_mbs;
 293                 while (nchars != (size_t)prec) {
 294                         nconv = mbrlen(p, MB_CUR_MAX, &mbs);
 295                         if (nconv == 0 || nconv == (size_t)-1 ||
 296                             nconv == (size_t)-2)
 297                                 break;
 298                         p += nconv;
 299                         nchars++;
 300                         insize += nconv;
 301                 }
 302                 if (nconv == (size_t)-1 || nconv == (size_t)-2)
 303                         return (NULL);
 304         } else {
 305                 insize = strlen(mbsarg);
 306                 nconv = 0;
 307         }
 308
 309         /*
 310          * Allocate buffer for the result and perform the conversion,
 311          * converting at most `size' bytes of the input multibyte string to
 312          * wide characters for printing.
 313          */
 314         convbuf = malloc((insize + 1) * sizeof(*convbuf));
 315         if (convbuf == NULL)
 316                 return (NULL);
 317         wcp = convbuf;
 318         p = mbsarg;
 319         mbs = initial_mbs;
 320         while (insize != 0) {
 321                 nconv = mbrtowc(wcp, p, insize, &mbs);
 322                 if (nconv == 0 || nconv == (size_t)-1 || nconv == (size_t)-2)
 323                         break;
 324                 wcp++;
 325                 p += nconv;
 326                 insize -= nconv;
 327         }
 328         if (nconv == (size_t)-1 || nconv == (size_t)-2) {
 329                 free(convbuf);
 330                 return (NULL);
 331         }
 332         *wcp = L'\0';
 333
 334         return (convbuf);
 335 }
 336
 337 /*
 338  * MT-safe version
 339  */
 340 int
 341 vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, va_list ap)
 342 {
 343         int ret;
 344
 345         FLOCKFILE(fp);
 346         /* optimise fprintf(stderr) (and other unbuffered Unix files) */
 347         if ((fp->pub._flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
 348             fp->pub._fileno >= 0)
 349                 ret = __sbprintf(fp, fmt0, ap);
 350         else
 351                 ret = __vfwprintf(fp, fmt0, ap);
 352         FUNLOCKFILE(fp);
 353         return (ret);
 354 }
 355
 356 /*
 357  * The size of the buffer we use as scratch space for integer
 358  * conversions, among other things.  We need enough space to
 359  * write a uintmax_t in octal (plus one byte).
 360  */
 361 #if UINTMAX_MAX <= UINT64_MAX
 362 #define BUF     32
 363 #else
 364 #error "BUF must be large enough to format a uintmax_t"
 365 #endif
 366
 367 /*
 368  * Non-MT-safe version
 369  */
 370 int
 371 __vfwprintf(FILE *fp, const wchar_t *fmt0, va_list ap)
 372 {
 373         wchar_t *fmt;           /* format string */
 374         wchar_t ch;             /* character from fmt */
 375         int n, n2;              /* handy integer (short term usage) */
 376         wchar_t *cp;            /* handy char pointer (short term usage) */
 377         int flags;              /* flags as above */
 378         int ret;                /* return value accumulator */
 379         int width;              /* width from format (%8d), or 0 */
 380         int prec;               /* precision from format; <0 for N/A */
 381         wchar_t sign;           /* sign prefix (' ', '+', '-', or \0) */
 382         struct grouping_state gs; /* thousands' grouping info */
 383 #ifndef NO_FLOATING_POINT
 384         /*
 385          * We can decompose the printed representation of floating
 386          * point numbers into several parts, some of which may be empty:
 387          *
 388          * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
 389          *    A       B     ---C---      D       E   F
 390          *
 391          * A:   'sign' holds this value if present; '\0' otherwise
 392          * B:   ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
 393          * C:   cp points to the string MMMNNN.  Leading and trailing
 394          *      zeros are not in the string and must be added.
 395          * D:   expchar holds this character; '\0' if no exponent, e.g. %f
 396          * F:   at least two digits for decimal, at least one digit for hex
 397          */
 398         wchar_t decimal_point;  /* locale specific decimal point */
 399         int signflag;           /* true if float is negative */
 400         union {                 /* floating point arguments %[aAeEfFgG] */
 401                 double dbl;
 402                 long double ldbl;
 403         } fparg;
 404         int expt;               /* integer value of exponent */
 405         char expchar;           /* exponent character: [eEpP\0] */
 406         char *dtoaend;          /* pointer to end of converted digits */
 407         int expsize;            /* character count for expstr */
 408         int ndig;               /* actual number of digits returned by dtoa */
 409         wchar_t expstr[MAXEXPDIG+2];    /* buffer for exponent string: e+ZZZ */
 410         char *dtoaresult;       /* buffer allocated by dtoa */
 411 #endif
 412         u_long  ulval;          /* integer arguments %[diouxX] */
 413         uintmax_t ujval;        /* %j, %ll, %q, %t, %z integers */
 414         int base;               /* base for [diouxX] conversion */
 415         int dprec;              /* a copy of prec if [diouxX], 0 otherwise */
 416         int realsz;             /* field size expanded by dprec, sign, etc */
 417         int size;               /* size of converted field or string */
 418         int prsize;             /* max size of printed field */
 419         const char *xdigs;      /* digits for [xX] conversion */
 420         struct io_state io;     /* I/O buffering state */
 421         wchar_t buf[BUF];       /* buffer with space for digits of uintmax_t */
 422         wchar_t ox[2];          /* space for 0x hex-prefix */
 423         union arg *argtable;    /* args, built due to positional arg */
 424         union arg statargtable [STATIC_ARG_TBL_SIZE];
 425         int nextarg;            /* 1-based argument index */
 426         va_list orgap;          /* original argument pointer */
 427         wchar_t *convbuf;       /* multibyte to wide conversion result */
 428
 429         static const char xdigs_lower[16] = "0123456789abcdef";
 430         static const char xdigs_upper[16] = "0123456789ABCDEF";
 431
 432         /* BEWARE, these `goto error' on error. */
 433 #define PRINT(ptr, len) do {                    \
 434         if (io_print(&io, (ptr), (len)))        \
 435                 goto error; \
 436 } while (0)
 437 #define PAD(howmany, with) { \
 438         if (io_pad(&io, (howmany), (with))) \
 439                 goto error; \
 440 }
 441 #define PRINTANDPAD(p, ep, len, with) { \
 442         if (io_printandpad(&io, (p), (ep), (len), (with))) \
 443                 goto error; \
 444 }
 445 #define FLUSH() { \
 446         if (io_flush(&io)) \
 447                 goto error; \
 448 }
 449
 450         /*
 451          * Get the argument indexed by nextarg.   If the argument table is
 452          * built, use it to get the argument.  If its not, get the next
 453          * argument (and arguments must be gotten sequentially).
 454          */
 455 #define GETARG(type) \
 456         ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
 457             (nextarg++, va_arg(ap, type)))
 458
 459         /*
 460          * To extend shorts properly, we need both signed and unsigned
 461          * argument extraction methods.
 462          */
 463 #define SARG() \
 464         (flags&LONGINT ? GETARG(long) : \
 465             flags&SHORTINT ? (long)(short)GETARG(int) : \
 466             flags&CHARINT ? (long)(signed char)GETARG(int) : \
 467             (long)GETARG(int))
 468 #define UARG() \
 469         (flags&LONGINT ? GETARG(u_long) : \
 470             flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
 471             flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
 472             (u_long)GETARG(u_int))
 473 #define INTMAX_SIZE     (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
 474 #define SJARG() \
 475         (flags&INTMAXT ? GETARG(intmax_t) : \
 476             flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
 477             flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
 478             (intmax_t)GETARG(long long))
 479 #define UJARG() \
 480         (flags&INTMAXT ? GETARG(uintmax_t) : \
 481             flags&SIZET ? (uintmax_t)GETARG(size_t) : \
 482             flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
 483             (uintmax_t)GETARG(unsigned long long))
 484
 485         /*
 486          * Get * arguments, including the form *nn$.  Preserve the nextarg
 487          * that the argument can be gotten once the type is determined.
 488          */
 489 #define GETASTER(val) \
 490         n2 = 0; \
 491         cp = fmt; \
 492         while (is_digit(*cp)) { \
 493                 n2 = 10 * n2 + to_digit(*cp); \
 494                 cp++; \
 495         } \
 496         if (*cp == '$') { \
 497                 int hold = nextarg; \
 498                 if (argtable == NULL) { \
 499                         argtable = statargtable; \
 500                         if (__find_warguments(fmt0, orgap, &argtable)) { \
 501                                 ret = EOF; \
 502                                 goto error; \
 503                         } \
 504                 } \
 505                 nextarg = n2; \
 506                 val = GETARG (int); \
 507                 nextarg = hold; \
 508                 fmt = ++cp; \
 509         } else { \
 510                 val = GETARG (int); \
 511         }
 512
 513
 514         /* sorry, fwprintf(read_only_file, L"") returns WEOF, not 0 */
 515         if (prepwrite(fp) != 0)
 516                 return (EOF);
 517
 518         convbuf = NULL;
 519         fmt = __DECONST(wchar_t *, fmt0);
 520         argtable = NULL;
 521         nextarg = 1;
 522         va_copy(orgap, ap);
 523         io_init(&io, fp);
 524         ret = 0;
 525 #ifndef NO_FLOATING_POINT
 526         decimal_point = get_decpt();
 527 #endif
 528
 529         /*
 530          * Scan the format for conversions (`%' character).
 531          */
 532         for (;;) {
 533                 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
 534                         /* void */;
 535                 if ((n = fmt - cp) != 0) {
 536                         if ((unsigned)ret + n > INT_MAX) {
 537                                 ret = EOF;
 538                                 goto error;
 539                         }
 540                         PRINT(cp, n);
 541                         ret += n;
 542                 }
 543                 if (ch == '\0')
 544                         goto done;
 545                 fmt++;          /* skip over '%' */
 546
 547                 flags = 0;
 548                 dprec = 0;
 549                 width = 0;
 550                 prec = -1;
 551                 gs.grouping = NULL;
 552                 sign = '\0';
 553                 ox[1] = '\0';
 554
 555 rflag:          ch = *fmt++;
 556 reswitch:       switch (ch) {
 557                 case ' ':
 558                         /*-
 559                          * ``If the space and + flags both appear, the space
 560                          * flag will be ignored.''
 561                          *      -- ANSI X3J11
 562                          */
 563                         if (!sign)
 564                                 sign = ' ';
 565                         goto rflag;
 566                 case '#':
 567                         flags |= ALT;
 568                         goto rflag;
 569                 case '*':
 570                         /*-
 571                          * ``A negative field width argument is taken as a
 572                          * - flag followed by a positive field width.''
 573                          *      -- ANSI X3J11
 574                          * They don't exclude field widths read from args.
 575                          */
 576                         GETASTER(width);
 577                         if (width >= 0)
 578                                 goto rflag;
 579                         width = -width;
 580                         /* FALLTHROUGH */
 581                 case '-':
 582                         flags |= LADJUST;
 583                         goto rflag;
 584                 case '+':
 585                         sign = '+';
 586                         goto rflag;
 587                 case '\'':
 588                         flags |= GROUPING;
 589                         goto rflag;
 590                 case '.':
 591                         if ((ch = *fmt++) == '*') {
 592                                 GETASTER(prec);
 593                                 goto rflag;
 594                         }
 595                         prec = 0;
 596                         while (is_digit(ch)) {
 597                                 prec = 10 * prec + to_digit(ch);
 598                                 ch = *fmt++;
 599                         }
 600                         goto reswitch;
 601                 case '0':
 602                         /*-
 603                          * ``Note that 0 is taken as a flag, not as the
 604                          * beginning of a field width.''
 605                          *      -- ANSI X3J11
 606                          */
 607                         flags |= ZEROPAD;
 608                         goto rflag;
 609                 case '1': case '2': case '3': case '4':
 610                 case '5': case '6': case '7': case '8': case '9':
 611                         n = 0;
 612                         do {
 613                                 n = 10 * n + to_digit(ch);
 614                                 ch = *fmt++;
 615                         } while (is_digit(ch));
 616                         if (ch == '$') {
 617                                 nextarg = n;
 618                                 if (argtable == NULL) {
 619                                         argtable = statargtable;
 620                                         if (__find_warguments(fmt0, orgap,
 621                                                               &argtable)) {
 622                                                 ret = EOF;
 623                                                 goto error;
 624                                         }
 625                                 }
 626                                 goto rflag;
 627                         }
 628                         width = n;
 629                         goto reswitch;
 630 #ifndef NO_FLOATING_POINT
 631                 case 'L':
 632                         flags |= LONGDBL;
 633                         goto rflag;
 634 #endif
 635                 case 'h':
 636                         if (flags & SHORTINT) {
 637                                 flags &= ~SHORTINT;
 638                                 flags |= CHARINT;
 639                         } else {
 640                                 flags |= SHORTINT;
 641                         }
 642                         goto rflag;
 643                 case 'j':
 644                         flags |= INTMAXT;
 645                         goto rflag;
 646                 case 'l':
 647                         if (flags & LONGINT) {
 648                                 flags &= ~LONGINT;
 649                                 flags |= LLONGINT;
 650                         } else {
 651                                 flags |= LONGINT;
 652                         }
 653                         goto rflag;
 654                 case 'q':
 655                         flags |= LLONGINT;      /* not necessarily */
 656                         goto rflag;
 657                 case 't':
 658                         flags |= PTRDIFFT;
 659                         goto rflag;
 660                 case 'z':
 661                         flags |= SIZET;
 662                         goto rflag;
 663                 case 'C':
 664                         flags |= LONGINT;
 665                         /*FALLTHROUGH*/
 666                 case 'c':
 667                         if (flags & LONGINT)
 668                                 *(cp = buf) = (wchar_t)GETARG(wint_t);
 669                         else
 670                                 *(cp = buf) = (wchar_t)btowc(GETARG(int));
 671                         size = 1;
 672                         sign = '\0';
 673                         break;
 674                 case 'D':
 675                         flags |= LONGINT;
 676                         /*FALLTHROUGH*/
 677                 case 'd':
 678                 case 'i':
 679                         if (flags & INTMAX_SIZE) {
 680                                 ujval = SJARG();
 681                                 if ((intmax_t)ujval < 0) {
 682                                         ujval = -ujval;
 683                                         sign = '-';
 684                                 }
 685                         } else {
 686                                 ulval = SARG();
 687                                 if ((long)ulval < 0) {
 688                                         ulval = -ulval;
 689                                         sign = '-';
 690                                 }
 691                         }
 692                         base = 10;
 693                         goto number;
 694 #ifndef NO_FLOATING_POINT
 695                 case 'a':
 696                 case 'A':
 697                         if (ch == 'a') {
 698                                 ox[1] = 'x';
 699                                 xdigs = xdigs_lower;
 700                                 expchar = 'p';
 701                         } else {
 702                                 ox[1] = 'X';
 703                                 xdigs = xdigs_upper;
 704                                 expchar = 'P';
 705                         }
 706                         if (prec >= 0)
 707                                 prec++;
 708                         if (flags & LONGDBL) {
 709                                 fparg.ldbl = GETARG(long double);
 710                                 dtoaresult =
 711                                     __hldtoa(fparg.ldbl, xdigs, prec,
 712                                         &expt, &signflag, &dtoaend);
 713                         } else {
 714                                 fparg.dbl = GETARG(double);
 715                                 dtoaresult =
 716                                     __hdtoa(fparg.dbl, xdigs, prec,
 717                                         &expt, &signflag, &dtoaend);
 718                         }
 719                         if (prec < 0)
 720                                 prec = dtoaend - dtoaresult;
 721                         if (expt == INT_MAX)
 722                                 ox[1] = '\0';
 723                         if (convbuf != NULL)
 724                                 free(convbuf);
 725                         ndig = dtoaend - dtoaresult;
 726                         cp = convbuf = __mbsconv(dtoaresult, -1);
 727                         freedtoa(dtoaresult);
 728                         goto fp_common;
 729                 case 'e':
 730                 case 'E':
 731                         expchar = ch;
 732                         if (prec < 0)   /* account for digit before decpt */
 733                                 prec = DEFPREC + 1;
 734                         else
 735                                 prec++;
 736                         goto fp_begin;
 737                 case 'f':
 738                 case 'F':
 739                         expchar = '\0';
 740                         goto fp_begin;
 741                 case 'g':
 742                 case 'G':
 743                         expchar = ch - ('g' - 'e');
 744                         if (prec == 0)
 745                                 prec = 1;
 746 fp_begin:
 747                         if (prec < 0)
 748                                 prec = DEFPREC;
 749                         if (convbuf != NULL)
 750                                 free(convbuf);
 751                         if (flags & LONGDBL) {
 752                                 fparg.ldbl = GETARG(long double);
 753                                 dtoaresult =
 754                                     __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
 755                                     &expt, &signflag, &dtoaend);
 756                         } else {
 757                                 fparg.dbl = GETARG(double);
 758                                 dtoaresult =
 759                                     dtoa(fparg.dbl, expchar ? 2 : 3, prec,
 760                                     &expt, &signflag, &dtoaend);
 761                                 if (expt == 9999)
 762                                         expt = INT_MAX;
 763                         }
 764                         ndig = dtoaend - dtoaresult;
 765                         cp = convbuf = __mbsconv(dtoaresult, -1);
 766                         freedtoa(dtoaresult);
 767 fp_common:
 768                         if (signflag)
 769                                 sign = '-';
 770                         if (expt == INT_MAX) {  /* inf or nan */
 771                                 if (*cp == 'N') {
 772                                         cp = (ch >= 'a') ? L"nan" : L"NAN";
 773                                         sign = '\0';
 774                                 } else
 775                                         cp = (ch >= 'a') ? L"inf" : L"INF";
 776                                 size = 3;
 777                                 flags &= ~ZEROPAD;
 778                                 break;
 779                         }
 780                         flags |= FPT;
 781                         if (ch == 'g' || ch == 'G') {
 782                                 if (expt > -4 && expt <= prec) {
 783                                         /* Make %[gG] smell like %[fF] */
 784                                         expchar = '\0';
 785                                         if (flags & ALT)
 786                                                 prec -= expt;
 787                                         else
 788                                                 prec = ndig - expt;
 789                                         if (prec < 0)
 790                                                 prec = 0;
 791                                 } else {
 792                                         /*
 793                                          * Make %[gG] smell like %[eE], but
 794                                          * trim trailing zeroes if no # flag.
 795                                          */
 796                                         if (!(flags & ALT))
 797                                                 prec = ndig;
 798                                 }
 799                         }
 800                         if (expchar) {
 801                                 expsize = exponent(expstr, expt - 1, expchar);
 802                                 size = expsize + prec;
 803                                 if (prec > 1 || flags & ALT)
 804                                         ++size;
 805                         } else {
 806                                 /* space for digits before decimal point */
 807                                 if (expt > 0)
 808                                         size = expt;
 809                                 else    /* "0" */
 810                                         size = 1;
 811                                 /* space for decimal pt and following digits */
 812                                 if (prec || flags & ALT)
 813                                         size += prec + 1;
 814                                 if ((flags & GROUPING) && expt > 0)
 815                                         size += grouping_init(&gs, expt);
 816                         }
 817                         break;
 818 #endif /* !NO_FLOATING_POINT */
 819                 case 'n':
 820                         /*
 821                          * Assignment-like behavior is specified if the
 822                          * value overflows or is otherwise unrepresentable.
 823                          * C99 says to use `signed char' for %hhn conversions.
 824                          */
 825                         if (flags & LLONGINT)
 826                                 *GETARG(long long *) = ret;
 827                         else if (flags & SIZET)
 828                                 *GETARG(ssize_t *) = (ssize_t)ret;
 829                         else if (flags & PTRDIFFT)
 830                                 *GETARG(ptrdiff_t *) = ret;
 831                         else if (flags & INTMAXT)
 832                                 *GETARG(intmax_t *) = ret;
 833                         else if (flags & LONGINT)
 834                                 *GETARG(long *) = ret;
 835                         else if (flags & SHORTINT)
 836                                 *GETARG(short *) = ret;
 837                         else if (flags & CHARINT)
 838                                 *GETARG(signed char *) = ret;
 839                         else
 840                                 *GETARG(int *) = ret;
 841                         continue;       /* no output */
 842                 case 'O':
 843                         flags |= LONGINT;
 844                         /*FALLTHROUGH*/
 845                 case 'o':
 846                         if (flags & INTMAX_SIZE)
 847                                 ujval = UJARG();
 848                         else
 849                                 ulval = UARG();
 850                         base = 8;
 851                         goto nosign;
 852                 case 'p':
 853                         /*-
 854                          * ``The argument shall be a pointer to void.  The
 855                          * value of the pointer is converted to a sequence
 856                          * of printable characters, in an implementation-
 857                          * defined manner.''
 858                          *      -- ANSI X3J11
 859                          */
 860                         ujval = (uintmax_t)(uintptr_t)GETARG(void *);
 861                         base = 16;
 862                         xdigs = xdigs_lower;
 863                         flags = flags | INTMAXT;
 864                         ox[1] = 'x';
 865                         goto nosign;
 866                 case 'S':
 867                         flags |= LONGINT;
 868                         /*FALLTHROUGH*/
 869                 case 's':
 870                         if (flags & LONGINT) {
 871                                 if ((cp = GETARG(wchar_t *)) == NULL)
 872                                         cp = L"(null)";
 873                         } else {
 874                                 char *mbp;
 875
 876                                 if (convbuf != NULL)
 877                                         free(convbuf);
 878                                 if ((mbp = GETARG(char *)) == NULL)
 879                                         cp = L"(null)";
 880                                 else {
 881                                         convbuf = __mbsconv(mbp, prec);
 882                                         if (convbuf == NULL) {
 883                                                 fp->pub._flags |= __SERR;
 884                                                 goto error;
 885                                         }
 886                                         cp = convbuf;
 887                                 }
 888                         }
 889                         size = (prec >= 0) ? wcsnlen(cp, prec) : wcslen(cp);
 890                         sign = '\0';
 891                         break;
 892                 case 'U':
 893                         flags |= LONGINT;
 894                         /*FALLTHROUGH*/
 895                 case 'u':
 896                         if (flags & INTMAX_SIZE)
 897                                 ujval = UJARG();
 898                         else
 899                                 ulval = UARG();
 900                         base = 10;
 901                         goto nosign;
 902                 case 'X':
 903                         xdigs = xdigs_upper;
 904                         goto hex;
 905                 case 'x':
 906                         xdigs = xdigs_lower;
 907 hex:
 908                         if (flags & INTMAX_SIZE)
 909                                 ujval = UJARG();
 910                         else
 911                                 ulval = UARG();
 912                         base = 16;
 913                         /* leading 0x/X only if non-zero */
 914                         if (flags & ALT &&
 915                             (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
 916                                 ox[1] = ch;
 917
 918                         flags &= ~GROUPING;
 919                         /* unsigned conversions */
 920 nosign:                 sign = '\0';
 921                         /*-
 922                          * ``... diouXx conversions ... if a precision is
 923                          * specified, the 0 flag will be ignored.''
 924                          *      -- ANSI X3J11
 925                          */
 926 number:                 if ((dprec = prec) >= 0)
 927                                 flags &= ~ZEROPAD;
 928
 929                         /*-
 930                          * ``The result of converting a zero value with an
 931                          * explicit precision of zero is no characters.''
 932                          *      -- ANSI X3J11
 933                          *
 934                          * ``The C Standard is clear enough as is.  The call
 935                          * printf("%#.0o", 0) should print 0.''
 936                          *      -- Defect Report #151
 937                          */
 938                         cp = buf + BUF;
 939                         if (flags & INTMAX_SIZE) {
 940                                 if (ujval != 0 || prec != 0 ||
 941                                     (flags & ALT && base == 8))
 942                                         cp = __ujtoa(ujval, cp, base,
 943                                             flags & ALT, xdigs);
 944                         } else {
 945                                 if (ulval != 0 || prec != 0 ||
 946                                     (flags & ALT && base == 8))
 947                                         cp = __ultoa(ulval, cp, base,
 948                                             flags & ALT, xdigs);
 949                         }
 950                         size = buf + BUF - cp;
 951                         if (size > BUF) /* should never happen */
 952                                 abort();
 953                         if ((flags & GROUPING) && size != 0)
 954                                 size += grouping_init(&gs, size);
 955                         break;
 956                 default:        /* "%?" prints ?, unless ? is NUL */
 957                         if (ch == '\0')
 958                                 goto done;
 959                         /* pretend it was %c with argument ch */
 960                         cp = buf;
 961                         *cp = ch;
 962                         size = 1;
 963                         sign = '\0';
 964                         break;
 965                 }
 966
 967                 /*
 968                  * All reasonable formats wind up here.  At this point, `cp'
 969                  * points to a string which (if not flags&LADJUST) should be
 970                  * padded out to `width' places.  If flags&ZEROPAD, it should
 971                  * first be prefixed by any sign or other prefix; otherwise,
 972                  * it should be blank padded before the prefix is emitted.
 973                  * After any left-hand padding and prefixing, emit zeroes
 974                  * required by a decimal [diouxX] precision, then print the
 975                  * string proper, then emit zeroes required by any leftover
 976                  * floating precision; finally, if LADJUST, pad with blanks.
 977                  *
 978                  * Compute actual size, so we know how much to pad.
 979                  * size excludes decimal prec; realsz includes it.
 980                  */
 981                 realsz = dprec > size ? dprec : size;
 982                 if (sign)
 983                         realsz++;
 984                 if (ox[1])
 985                         realsz += 2;
 986
 987                 prsize = width > realsz ? width : realsz;
 988                 if ((unsigned)ret + prsize > INT_MAX) {
 989                         ret = EOF;
 990                         goto error;
 991                 }
 992
 993                 /* right-adjusting blank padding */
 994                 if ((flags & (LADJUST|ZEROPAD)) == 0)
 995                         PAD(width - realsz, blanks);
 996
 997                 /* prefix */
 998                 if (sign)
 999                         PRINT(&sign, 1);
1000
1001                 if (ox[1]) {    /* ox[1] is either x, X, or \0 */
1002                         ox[0] = '0';
1003                         PRINT(ox, 2);
1004                 }
1005
1006                 /* right-adjusting zero padding */
1007                 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
1008                         PAD(width - realsz, zeroes);
1009
1010                 /* the string or number proper */
1011 #ifndef NO_FLOATING_POINT
1012                 if ((flags & FPT) == 0) {
1013 #endif
1014                         /* leading zeroes from decimal precision */
1015                         PAD(dprec - size, zeroes);
1016                         if (gs.grouping) {
1017                                 if (grouping_print(&gs, &io, cp, buf+BUF) < 0)
1018                                         goto error;
1019                         } else {
1020                                 PRINT(cp, size);
1021                         }
1022 #ifndef NO_FLOATING_POINT
1023                 } else {        /* glue together f_p fragments */
1024                         if (!expchar) { /* %[fF] or sufficiently short %[gG] */
1025                                 if (expt <= 0) {
1026                                         PRINT(zeroes, 1);
1027                                         if (prec || flags & ALT)
1028                                                 PRINT(&decimal_point, 1);
1029                                         PAD(-expt, zeroes);
1030                                         /* already handled initial 0's */
1031                                         prec += expt;
1032                                 } else {
1033                                         if (gs.grouping) {
1034                                                 n = grouping_print(&gs, &io,
1035                                                     cp, convbuf + ndig);
1036                                                 if (n < 0)
1037                                                         goto error;
1038                                                 cp += n;
1039                                         } else {
1040                                                 PRINTANDPAD(cp, convbuf + ndig,
1041                                                     expt, zeroes);
1042                                                 cp += expt;
1043                                         }
1044                                         if (prec || flags & ALT)
1045                                                 PRINT(&decimal_point, 1);
1046                                 }
1047                                 PRINTANDPAD(cp, convbuf + ndig, prec, zeroes);
1048                         } else {        /* %[eE] or sufficiently long %[gG] */
1049                                 if (prec > 1 || flags & ALT) {
1050                                         buf[0] = *cp++;
1051                                         buf[1] = decimal_point;
1052                                         PRINT(buf, 2);
1053                                         PRINT(cp, ndig-1);
1054                                         PAD(prec - ndig, zeroes);
1055                                 } else  /* XeYYY */
1056                                         PRINT(cp, 1);
1057                                 PRINT(expstr, expsize);
1058                         }
1059                 }
1060 #endif
1061                 /* left-adjusting padding (always blank) */
1062                 if (flags & LADJUST)
1063                         PAD(width - realsz, blanks);
1064
1065                 /* finally, adjust ret */
1066                 ret += prsize;
1067
1068                 FLUSH();        /* copy out the I/O vectors */
1069         }
1070 done:
1071         FLUSH();
1072 error:
1073         va_end(orgap);
1074         if (convbuf != NULL)
1075                 free(convbuf);
1076         if (__sferror(fp))
1077                 ret = EOF;
1078         if ((argtable != NULL) && (argtable != statargtable))
1079                 free(argtable);
1080         return (ret);
1081         /* NOTREACHED */
1082 }