lib/libc/stdio/vfprintf.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  * Copyright (c) 2011 The FreeBSD Foundation
   9  * All rights reserved.
  10  * Portions of this software were developed by David Chisnall
  11  * under sponsorship from the FreeBSD Foundation.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. Neither the name of the University nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  * @(#)vfprintf.c       8.1 (Berkeley) 6/4/93
  38  * $FreeBSD: head/lib/libc/stdio/vfprintf.c 268930 2014-07-20 21:24:29Z pfg $
  39  */
  40
  41 /*
  42  * Actual printf innards.
  43  *
  44  * This code is large and complicated...
  45  */
  46
  47 #include "namespace.h"
  48 #include <sys/types.h>
  49
  50 #include <ctype.h>
  51 #include <errno.h>
  52 #include <limits.h>
  53 #include <pthread.h> /* for FAKE_FILE PTHREAD_MUTEX_INITIALIZER */
  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 #include <printf.h>
  62
  63 #include <stdarg.h>
  64 #include "xlocale_private.h"
  65 #include "un-namespace.h"
  66
  67 #include "libc_private.h"
  68 #include "local.h"
  69 #include "printflocal.h"
  70
  71 static int      __sprint(FILE *, struct __suio *, locale_t);
  72 static int      __sbprintf(FILE *, locale_t, const char *, va_list) __printflike(3, 0)
  73         __noinline;
  74 static char     *__wcsconv(wchar_t *, int);
  75
  76 #define CHAR    char
  77 #include "printfcommon.h"
  78
  79 struct grouping_state {
  80         char *thousands_sep;    /* locale-specific thousands separator */
  81         int thousep_len;        /* length of thousands_sep */
  82         const char *grouping;   /* locale-specific numeric grouping rules */
  83         int lead;               /* sig figs before decimal or group sep */
  84         int nseps;              /* number of group separators with ' */
  85         int nrepeats;           /* number of repeats of the last group */
  86 };
  87
  88 /*
  89  * Initialize the thousands' grouping state in preparation to print a
  90  * number with ndigits digits. This routine returns the total number
  91  * of bytes that will be needed.
  92  */
  93 static int
  94 grouping_init(struct grouping_state *gs, int ndigits, locale_t loc)
  95 {
  96         struct lconv *locale;
  97
  98         locale = localeconv_l(loc);
  99         gs->grouping = locale->grouping;
 100         gs->thousands_sep = locale->thousands_sep;
 101         gs->thousep_len = strlen(gs->thousands_sep);
 102
 103         gs->nseps = gs->nrepeats = 0;
 104         gs->lead = ndigits;
 105         while (*gs->grouping != CHAR_MAX) {
 106                 if (gs->lead <= *gs->grouping)
 107                         break;
 108                 gs->lead -= *gs->grouping;
 109                 if (*(gs->grouping+1)) {
 110                         gs->nseps++;
 111                         gs->grouping++;
 112                 } else
 113                         gs->nrepeats++;
 114         }
 115         return ((gs->nseps + gs->nrepeats) * gs->thousep_len);
 116 }
 117
 118 /*
 119  * Print a number with thousands' separators.
 120  */
 121 static int
 122 grouping_print(struct grouping_state *gs, struct io_state *iop,
 123                const CHAR *cp, const CHAR *ep, locale_t locale)
 124 {
 125         const CHAR *cp0 = cp;
 126
 127         if (io_printandpad(iop, cp, ep, gs->lead, zeroes, locale))
 128                 return (-1);
 129         cp += gs->lead;
 130         while (gs->nseps > 0 || gs->nrepeats > 0) {
 131                 if (gs->nrepeats > 0)
 132                         gs->nrepeats--;
 133                 else {
 134                         gs->grouping--;
 135                         gs->nseps--;
 136                 }
 137                 if (io_print(iop, gs->thousands_sep, gs->thousep_len, locale))
 138                         return (-1);
 139                 if (io_printandpad(iop, cp, ep, *gs->grouping, zeroes, locale))
 140                         return (-1);
 141                 cp += *gs->grouping;
 142         }
 143         if (cp > ep)
 144                 cp = ep;
 145         return (cp - cp0);
 146 }
 147
 148 /*
 149  * Flush out all the vectors defined by the given uio,
 150  * then reset it so that it can be reused.
 151  */
 152 static int
 153 __sprint(FILE *fp, struct __suio *uio, locale_t locale __unused)
 154 {
 155         int err;
 156
 157         if (uio->uio_resid == 0) {
 158                 uio->uio_iovcnt = 0;
 159                 return (0);
 160         }
 161         err = __sfvwrite(fp, uio);
 162         uio->uio_resid = 0;
 163         uio->uio_iovcnt = 0;
 164         return (err);
 165 }
 166
 167 /*
 168  * Helper function for `fprintf to unbuffered unix file': creates a
 169  * temporary buffer.  We only work on write-only files; this avoids
 170  * worries about ungetc buffers and so forth.
 171  */
 172 static int
 173 __sbprintf(FILE *fp, locale_t locale, const char *fmt, va_list ap)
 174 {
 175         int ret;
 176         FILE fake = FAKE_FILE;
 177         unsigned char buf[BUFSIZ];
 178
 179         /* XXX This is probably not needed. */
 180         if (prepwrite(fp) != 0)
 181                 return (EOF);
 182
 183         /* copy the important variables */
 184         fake.pub._flags = fp->pub._flags & ~__SNBF;
 185         fake.pub._fileno = fp->pub._fileno;
 186         fake._cookie = fp->_cookie;
 187         fake._write = fp->_write;
 188
 189         /* set up the buffer */
 190         fake._bf._base = fake.pub._p = buf;
 191         fake._bf._size = fake.pub._w = sizeof(buf);
 192         fake.pub._lbfsize = 0;  /* not actually used, but Just In Case */
 193
 194         /* do the work, then copy any error status */
 195         ret = __vfprintf(&fake, locale, fmt, ap);
 196         if (ret >= 0 && __fflush(&fake))
 197                 ret = EOF;
 198         if (fake.pub._flags & __SERR)
 199                 fp->pub._flags |= __SERR;
 200         return (ret);
 201 }
 202
 203 /*
 204  * Convert a wide character string argument for the %ls format to a multibyte
 205  * string representation. If not -1, prec specifies the maximum number of
 206  * bytes to output, and also means that we can't assume that the wide char.
 207  * string ends is null-terminated.
 208  */
 209 static char *
 210 __wcsconv(wchar_t *wcsarg, int prec)
 211 {
 212         static const mbstate_t initial;
 213         mbstate_t mbs;
 214         char buf[MB_LEN_MAX];
 215         wchar_t *p;
 216         char *convbuf;
 217         size_t clen, nbytes;
 218
 219         /* Allocate space for the maximum number of bytes we could output. */
 220         if (prec < 0) {
 221                 p = wcsarg;
 222                 mbs = initial;
 223                 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs);
 224                 if (nbytes == (size_t)-1)
 225                         return (NULL);
 226         } else {
 227                 /*
 228                  * Optimisation: if the output precision is small enough,
 229                  * just allocate enough memory for the maximum instead of
 230                  * scanning the string.
 231                  */
 232                 if (prec < 128)
 233                         nbytes = prec;
 234                 else {
 235                         nbytes = 0;
 236                         p = wcsarg;
 237                         mbs = initial;
 238                         for (;;) {
 239                                 clen = wcrtomb(buf, *p++, &mbs);
 240                                 if (clen == 0 || clen == (size_t)-1 ||
 241                                     nbytes + clen > prec)
 242                                         break;
 243                                 nbytes += clen;
 244                         }
 245                 }
 246         }
 247         if ((convbuf = malloc(nbytes + 1)) == NULL)
 248                 return (NULL);
 249
 250         /* Fill the output buffer. */
 251         p = wcsarg;
 252         mbs = initial;
 253         if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p,
 254             nbytes, &mbs)) == (size_t)-1) {
 255                 free(convbuf);
 256                 return (NULL);
 257         }
 258         convbuf[nbytes] = '\0';
 259         return (convbuf);
 260 }
 261
 262 /*
 263  * MT-safe version
 264  */
 265 int
 266 vfprintf_l(FILE * __restrict fp, locale_t locale, const char * __restrict fmt0,
 267                 va_list ap)
 268 {
 269         int ret;
 270         FIX_LOCALE(locale);
 271
 272         FLOCKFILE(fp);
 273         /* optimise fprintf(stderr) (and other unbuffered Unix files) */
 274         if ((fp->pub._flags & (__SNBF|__SWR|__SRW)) == (__SNBF|__SWR) &&
 275             fp->pub._fileno >= 0)
 276                 ret = __sbprintf(fp, locale, fmt0, ap);
 277         else
 278                 ret = __vfprintf(fp, locale, fmt0, ap);
 279         FUNLOCKFILE(fp);
 280         return (ret);
 281 }
 282 int
 283 vfprintf(FILE * __restrict fp, const char * __restrict fmt0, va_list ap)
 284 {
 285         return vfprintf_l(fp, __get_locale(), fmt0, ap);
 286 }
 287
 288 /*
 289  * The size of the buffer we use as scratch space for integer
 290  * conversions, among other things.  We need enough space to
 291  * write a uintmax_t in octal (plus one byte).
 292  */
 293 #if UINTMAX_MAX <= UINT64_MAX
 294 #define BUF     32
 295 #else
 296 #error "BUF must be large enough to format a uintmax_t"
 297 #endif
 298
 299 /*
 300  * Non-MT-safe version
 301  */
 302 int
 303 __vfprintf(FILE *fp, locale_t locale, const char *fmt0, va_list ap)
 304 {
 305         char *fmt;              /* format string */
 306         int ch;                 /* character from fmt */
 307         int n, n2;              /* handy integer (short term usage) */
 308         char *cp;               /* handy char pointer (short term usage) */
 309         int flags;              /* flags as above */
 310         int ret;                /* return value accumulator */
 311         int width;              /* width from format (%8d), or 0 */
 312         int prec;               /* precision from format; <0 for N/A */
 313         char sign;              /* sign prefix (' ', '+', '-', or \0) */
 314         struct grouping_state gs; /* thousands' grouping info */
 315
 316 #ifndef NO_FLOATING_POINT
 317         /*
 318          * We can decompose the printed representation of floating
 319          * point numbers into several parts, some of which may be empty:
 320          *
 321          * [+|-| ] [0x|0X] MMM . NNN [e|E|p|P] [+|-] ZZ
 322          *    A       B     ---C---      D       E   F
 323          *
 324          * A:   'sign' holds this value if present; '\0' otherwise
 325          * B:   ox[1] holds the 'x' or 'X'; '\0' if not hexadecimal
 326          * C:   cp points to the string MMMNNN.  Leading and trailing
 327          *      zeros are not in the string and must be added.
 328          * D:   expchar holds this character; '\0' if no exponent, e.g. %f
 329          * F:   at least two digits for decimal, at least one digit for hex
 330          */
 331         char *decimal_point;    /* locale specific decimal point */
 332         int decpt_len;          /* length of decimal_point */
 333         int signflag;           /* true if float is negative */
 334         union {                 /* floating point arguments %[aAeEfFgG] */
 335                 double dbl;
 336                 long double ldbl;
 337         } fparg;
 338         int expt;               /* integer value of exponent */
 339         char expchar;           /* exponent character: [eEpP\0] */
 340         char *dtoaend;          /* pointer to end of converted digits */
 341         int expsize;            /* character count for expstr */
 342         int ndig;               /* actual number of digits returned by dtoa */
 343         char expstr[MAXEXPDIG+2];       /* buffer for exponent string: e+ZZZ */
 344         char *dtoaresult;       /* buffer allocated by dtoa */
 345 #endif
 346         u_long  ulval;          /* integer arguments %[diouxX] */
 347         uintmax_t ujval;        /* %j, %ll, %q, %t, %z integers */
 348         int base;               /* base for [diouxX] conversion */
 349         int dprec;              /* a copy of prec if [diouxX], 0 otherwise */
 350         int realsz;             /* field size expanded by dprec, sign, etc */
 351         int size;               /* size of converted field or string */
 352         int prsize;             /* max size of printed field */
 353         const char *xdigs;      /* digits for %[xX] conversion */
 354         struct io_state io;     /* I/O buffering state */
 355         char buf[BUF];          /* buffer with space for digits of uintmax_t */
 356         char ox[2];             /* space for 0x; ox[1] is either x, X, or \0 */
 357         union arg *argtable;    /* args, built due to positional arg */
 358         union arg statargtable [STATIC_ARG_TBL_SIZE];
 359         int nextarg;            /* 1-based argument index */
 360         va_list orgap;          /* original argument pointer */
 361         char *convbuf;          /* wide to multibyte conversion result */
 362
 363         static const char xdigs_lower[16] = "0123456789abcdef";
 364         static const char xdigs_upper[16] = "0123456789ABCDEF";
 365
 366         /* BEWARE, these `goto error' on error. */
 367 #define PRINT(ptr, len) { \
 368         if (io_print(&io, (ptr), (len), locale))        \
 369                 goto error; \
 370 }
 371 #define PAD(howmany, with) { \
 372         if (io_pad(&io, (howmany), (with), locale)) \
 373                 goto error; \
 374 }
 375 #define PRINTANDPAD(p, ep, len, with) { \
 376         if (io_printandpad(&io, (p), (ep), (len), (with), locale)) \
 377                 goto error; \
 378 }
 379 #define FLUSH() { \
 380         if (io_flush(&io, locale)) \
 381                 goto error; \
 382 }
 383
 384         /*
 385          * Get the argument indexed by nextarg.   If the argument table is
 386          * built, use it to get the argument.  If its not, get the next
 387          * argument (and arguments must be gotten sequentially).
 388          */
 389 #define GETARG(type) \
 390         ((argtable != NULL) ? *((type*)(&argtable[nextarg++])) : \
 391             (nextarg++, va_arg(ap, type)))
 392
 393         /*
 394          * To extend shorts properly, we need both signed and unsigned
 395          * argument extraction methods.
 396          */
 397 #define SARG() \
 398         (flags&LONGINT ? GETARG(long) : \
 399             flags&SHORTINT ? (long)(short)GETARG(int) : \
 400             flags&CHARINT ? (long)(signed char)GETARG(int) : \
 401             (long)GETARG(int))
 402 #define UARG() \
 403         (flags&LONGINT ? GETARG(u_long) : \
 404             flags&SHORTINT ? (u_long)(u_short)GETARG(int) : \
 405             flags&CHARINT ? (u_long)(u_char)GETARG(int) : \
 406             (u_long)GETARG(u_int))
 407 #define INTMAX_SIZE     (INTMAXT|SIZET|PTRDIFFT|LLONGINT)
 408 #define SJARG() \
 409         (flags&INTMAXT ? GETARG(intmax_t) : \
 410             flags&SIZET ? (intmax_t)GETARG(ssize_t) : \
 411             flags&PTRDIFFT ? (intmax_t)GETARG(ptrdiff_t) : \
 412             (intmax_t)GETARG(long long))
 413 #define UJARG() \
 414         (flags&INTMAXT ? GETARG(uintmax_t) : \
 415             flags&SIZET ? (uintmax_t)GETARG(size_t) : \
 416             flags&PTRDIFFT ? (uintmax_t)GETARG(ptrdiff_t) : \
 417             (uintmax_t)GETARG(unsigned long long))
 418
 419         /*
 420          * Get * arguments, including the form *nn$.  Preserve the nextarg
 421          * that the argument can be gotten once the type is determined.
 422          */
 423 #define GETASTER(val) \
 424         n2 = 0; \
 425         cp = fmt; \
 426         while (is_digit(*cp)) { \
 427                 n2 = 10 * n2 + to_digit(*cp); \
 428                 cp++; \
 429         } \
 430         if (*cp == '$') { \
 431                 int hold = nextarg; \
 432                 if (argtable == NULL) { \
 433                         argtable = statargtable; \
 434                         if (__find_arguments (fmt0, orgap, &argtable)) { \
 435                                 ret = EOF; \
 436                                 goto error; \
 437                         } \
 438                 } \
 439                 nextarg = n2; \
 440                 val = GETARG (int); \
 441                 nextarg = hold; \
 442                 fmt = ++cp; \
 443         } else { \
 444                 val = GETARG (int); \
 445         }
 446
 447         if (__use_xprintf == 0 && getenv("USE_XPRINTF"))
 448                 __use_xprintf = 1;
 449         if (__use_xprintf > 0)
 450                 return (__xvprintf(fp, fmt0, ap));
 451
 452         /* sorry, fprintf(read_only_file, "") returns EOF, not 0 */
 453         if (prepwrite(fp) != 0) {
 454                 errno = EBADF;
 455                 return (EOF);
 456         }
 457
 458         convbuf = NULL;
 459         fmt = (char *)fmt0;
 460         argtable = NULL;
 461         nextarg = 1;
 462         va_copy(orgap, ap);
 463         io_init(&io, fp);
 464         ret = 0;
 465 #ifndef NO_FLOATING_POINT
 466         dtoaresult = NULL;
 467         decimal_point = localeconv_l(locale)->decimal_point;
 468         /* The overwhelmingly common case is decpt_len == 1. */
 469         decpt_len = (decimal_point[1] == '\0' ? 1 : strlen(decimal_point));
 470 #endif
 471
 472         /*
 473          * Scan the format for conversions (`%' character).
 474          */
 475         for (;;) {
 476                 for (cp = fmt; (ch = *fmt) != '\0' && ch != '%'; fmt++)
 477                         /* void */;
 478                 if ((n = fmt - cp) != 0) {
 479                         if ((unsigned)ret + n > INT_MAX) {
 480                                 ret = EOF;
 481                                 errno = EOVERFLOW;
 482                                 goto error;
 483                         }
 484                         PRINT(cp, n);
 485                         ret += n;
 486                 }
 487                 if (ch == '\0')
 488                         goto done;
 489                 fmt++;          /* skip over '%' */
 490
 491                 flags = 0;
 492                 dprec = 0;
 493                 width = 0;
 494                 prec = -1;
 495                 gs.grouping = NULL;
 496                 sign = '\0';
 497                 ox[1] = '\0';
 498
 499 rflag:          ch = *fmt++;
 500 reswitch:       switch (ch) {
 501                 case ' ':
 502                         /*-
 503                          * ``If the space and + flags both appear, the space
 504                          * flag will be ignored.''
 505                          *      -- ANSI X3J11
 506                          */
 507                         if (!sign)
 508                                 sign = ' ';
 509                         goto rflag;
 510                 case '#':
 511                         flags |= ALT;
 512                         goto rflag;
 513                 case '*':
 514                         /*-
 515                          * ``A negative field width argument is taken as a
 516                          * - flag followed by a positive field width.''
 517                          *      -- ANSI X3J11
 518                          * They don't exclude field widths read from args.
 519                          */
 520                         GETASTER (width);
 521                         if (width >= 0)
 522                                 goto rflag;
 523                         width = -width;
 524                         /* FALLTHROUGH */
 525                 case '-':
 526                         flags |= LADJUST;
 527                         goto rflag;
 528                 case '+':
 529                         sign = '+';
 530                         goto rflag;
 531                 case '\'':
 532                         flags |= GROUPING;
 533                         goto rflag;
 534                 case '.':
 535                         if ((ch = *fmt++) == '*') {
 536                                 GETASTER (prec);
 537                                 goto rflag;
 538                         }
 539                         prec = 0;
 540                         while (is_digit(ch)) {
 541                                 prec = 10 * prec + to_digit(ch);
 542                                 ch = *fmt++;
 543                         }
 544                         goto reswitch;
 545                 case '0':
 546                         /*-
 547                          * ``Note that 0 is taken as a flag, not as the
 548                          * beginning of a field width.''
 549                          *      -- ANSI X3J11
 550                          */
 551                         flags |= ZEROPAD;
 552                         goto rflag;
 553                 case '1': case '2': case '3': case '4':
 554                 case '5': case '6': case '7': case '8': case '9':
 555                         n = 0;
 556                         do {
 557                                 n = 10 * n + to_digit(ch);
 558                                 ch = *fmt++;
 559                         } while (is_digit(ch));
 560                         if (ch == '$') {
 561                                 nextarg = n;
 562                                 if (argtable == NULL) {
 563                                         argtable = statargtable;
 564                                         if (__find_arguments (fmt0, orgap,
 565                                                               &argtable)) {
 566                                                 ret = EOF;
 567                                                 goto error;
 568                                         }
 569                                 }
 570                                 goto rflag;
 571                         }
 572                         width = n;
 573                         goto reswitch;
 574 #ifndef NO_FLOATING_POINT
 575                 case 'L':
 576                         flags |= LONGDBL;
 577                         goto rflag;
 578 #endif
 579                 case 'h':
 580                         if (flags & SHORTINT) {
 581                                 flags &= ~SHORTINT;
 582                                 flags |= CHARINT;
 583                         } else
 584                                 flags |= SHORTINT;
 585                         goto rflag;
 586                 case 'j':
 587                         flags |= INTMAXT;
 588                         goto rflag;
 589                 case 'l':
 590                         if (flags & LONGINT) {
 591                                 flags &= ~LONGINT;
 592                                 flags |= LLONGINT;
 593                         } else
 594                                 flags |= LONGINT;
 595                         goto rflag;
 596                 case 'q':
 597                         flags |= LLONGINT;      /* not necessarily */
 598                         goto rflag;
 599                 case 't':
 600                         flags |= PTRDIFFT;
 601                         goto rflag;
 602                 case 'z':
 603                         flags |= SIZET;
 604                         goto rflag;
 605                 case 'C':
 606                         flags |= LONGINT;
 607                         /*FALLTHROUGH*/
 608                 case 'c':
 609                         if (flags & LONGINT) {
 610                                 static const mbstate_t initial;
 611                                 mbstate_t mbs;
 612                                 size_t mbseqlen;
 613
 614                                 mbs = initial;
 615                                 mbseqlen = wcrtomb(cp = buf,
 616                                     (wchar_t)GETARG(wint_t), &mbs);
 617                                 if (mbseqlen == (size_t)-1) {
 618                                         fp->pub._flags |= __SERR;
 619                                         goto error;
 620                                 }
 621                                 size = (int)mbseqlen;
 622                         } else {
 623                                 *(cp = buf) = GETARG(int);
 624                                 size = 1;
 625                         }
 626                         sign = '\0';
 627                         break;
 628                 case 'D':
 629                         flags |= LONGINT;
 630                         /*FALLTHROUGH*/
 631                 case 'd':
 632                 case 'i':
 633                         if (flags & INTMAX_SIZE) {
 634                                 ujval = SJARG();
 635                                 if ((intmax_t)ujval < 0) {
 636                                         ujval = -ujval;
 637                                         sign = '-';
 638                                 }
 639                         } else {
 640                                 ulval = SARG();
 641                                 if ((long)ulval < 0) {
 642                                         ulval = -ulval;
 643                                         sign = '-';
 644                                 }
 645                         }
 646                         base = 10;
 647                         goto number;
 648 #ifndef NO_FLOATING_POINT
 649                 case 'a':
 650                 case 'A':
 651                         if (ch == 'a') {
 652                                 ox[1] = 'x';
 653                                 xdigs = xdigs_lower;
 654                                 expchar = 'p';
 655                         } else {
 656                                 ox[1] = 'X';
 657                                 xdigs = xdigs_upper;
 658                                 expchar = 'P';
 659                         }
 660                         if (prec >= 0)
 661                                 prec++;
 662                         if (dtoaresult != NULL)
 663                                 freedtoa(dtoaresult);
 664                         if (flags & LONGDBL) {
 665                                 fparg.ldbl = GETARG(long double);
 666                                 dtoaresult = cp =
 667                                     __hldtoa(fparg.ldbl, xdigs, prec,
 668                                     &expt, &signflag, &dtoaend);
 669                         } else {
 670                                 fparg.dbl = GETARG(double);
 671                                 dtoaresult = cp =
 672                                     __hdtoa(fparg.dbl, xdigs, prec,
 673                                     &expt, &signflag, &dtoaend);
 674                         }
 675                         if (prec < 0)
 676                                 prec = dtoaend - cp;
 677                         if (expt == INT_MAX)
 678                                 ox[1] = '\0';
 679                         goto fp_common;
 680                 case 'e':
 681                 case 'E':
 682                         expchar = ch;
 683                         if (prec < 0)   /* account for digit before decpt */
 684                                 prec = DEFPREC + 1;
 685                         else
 686                                 prec++;
 687                         goto fp_begin;
 688                 case 'f':
 689                 case 'F':
 690                         expchar = '\0';
 691                         goto fp_begin;
 692                 case 'g':
 693                 case 'G':
 694                         expchar = ch - ('g' - 'e');
 695                         if (prec == 0)
 696                                 prec = 1;
 697 fp_begin:
 698                         if (prec < 0)
 699                                 prec = DEFPREC;
 700                         if (dtoaresult != NULL)
 701                                 freedtoa(dtoaresult);
 702                         if (flags & LONGDBL) {
 703                                 fparg.ldbl = GETARG(long double);
 704                                 dtoaresult = cp =
 705                                     __ldtoa(&fparg.ldbl, expchar ? 2 : 3, prec,
 706                                     &expt, &signflag, &dtoaend);
 707                         } else {
 708                                 fparg.dbl = GETARG(double);
 709                                 dtoaresult = cp =
 710                                     dtoa(fparg.dbl, expchar ? 2 : 3, prec,
 711                                     &expt, &signflag, &dtoaend);
 712                                 if (expt == 9999)
 713                                         expt = INT_MAX;
 714                         }
 715 fp_common:
 716                         if (signflag)
 717                                 sign = '-';
 718                         if (expt == INT_MAX) {  /* inf or nan */
 719                                 if (*cp == 'N') {
 720                                         cp = (ch >= 'a') ? "nan" : "NAN";
 721                                         sign = '\0';
 722                                 } else
 723                                         cp = (ch >= 'a') ? "inf" : "INF";
 724                                 size = 3;
 725                                 flags &= ~ZEROPAD;
 726                                 break;
 727                         }
 728                         flags |= FPT;
 729                         ndig = dtoaend - cp;
 730                         if (ch == 'g' || ch == 'G') {
 731                                 if (expt > -4 && expt <= prec) {
 732                                         /* Make %[gG] smell like %[fF] */
 733                                         expchar = '\0';
 734                                         if (flags & ALT)
 735                                                 prec -= expt;
 736                                         else
 737                                                 prec = ndig - expt;
 738                                         if (prec < 0)
 739                                                 prec = 0;
 740                                 } else {
 741                                         /*
 742                                          * Make %[gG] smell like %[eE], but
 743                                          * trim trailing zeroes if no # flag.
 744                                          */
 745                                         if (!(flags & ALT))
 746                                                 prec = ndig;
 747                                 }
 748                         }
 749                         if (expchar) {
 750                                 expsize = exponent(expstr, expt - 1, expchar);
 751                                 size = expsize + prec;
 752                                 if (prec > 1 || flags & ALT)
 753                                         size += decpt_len;
 754                         } else {
 755                                 /* space for digits before decimal point */
 756                                 if (expt > 0)
 757                                         size = expt;
 758                                 else    /* "0" */
 759                                         size = 1;
 760                                 /* space for decimal pt and following digits */
 761                                 if (prec || flags & ALT)
 762                                         size += prec + decpt_len;
 763                                 if ((flags & GROUPING) && expt > 0)
 764                                         size += grouping_init(&gs, expt, locale);
 765                         }
 766                         break;
 767 #endif /* !NO_FLOATING_POINT */
 768                 case 'n':
 769                         /*
 770                          * Assignment-like behavior is specified if the
 771                          * value overflows or is otherwise unrepresentable.
 772                          * C99 says to use `signed char' for %hhn conversions.
 773                          */
 774                         if (flags & LLONGINT)
 775                                 *GETARG(long long *) = ret;
 776                         else if (flags & SIZET)
 777                                 *GETARG(ssize_t *) = (ssize_t)ret;
 778                         else if (flags & PTRDIFFT)
 779                                 *GETARG(ptrdiff_t *) = ret;
 780                         else if (flags & INTMAXT)
 781                                 *GETARG(intmax_t *) = ret;
 782                         else if (flags & LONGINT)
 783                                 *GETARG(long *) = ret;
 784                         else if (flags & SHORTINT)
 785                                 *GETARG(short *) = ret;
 786                         else if (flags & CHARINT)
 787                                 *GETARG(signed char *) = ret;
 788                         else
 789                                 *GETARG(int *) = ret;
 790                         continue;       /* no output */
 791                 case 'O':
 792                         flags |= LONGINT;
 793                         /*FALLTHROUGH*/
 794                 case 'o':
 795                         if (flags & INTMAX_SIZE)
 796                                 ujval = UJARG();
 797                         else
 798                                 ulval = UARG();
 799                         base = 8;
 800                         goto nosign;
 801                 case 'p':
 802                         /*-
 803                          * ``The argument shall be a pointer to void.  The
 804                          * value of the pointer is converted to a sequence
 805                          * of printable characters, in an implementation-
 806                          * defined manner.''
 807                          *      -- ANSI X3J11
 808                          */
 809                         ujval = (uintmax_t)(uintptr_t)GETARG(void *);
 810                         base = 16;
 811                         xdigs = xdigs_lower;
 812                         flags = flags | INTMAXT;
 813                         ox[1] = 'x';
 814                         goto nosign;
 815                 case 'S':
 816                         flags |= LONGINT;
 817                         /*FALLTHROUGH*/
 818                 case 's':
 819                         if (flags & LONGINT) {
 820                                 wchar_t *wcp;
 821
 822                                 if (convbuf != NULL)
 823                                         free(convbuf);
 824                                 if ((wcp = GETARG(wchar_t *)) == NULL)
 825                                         cp = "(null)";
 826                                 else {
 827                                         convbuf = __wcsconv(wcp, prec);
 828                                         if (convbuf == NULL) {
 829                                                 fp->pub._flags |= __SERR;
 830                                                 goto error;
 831                                         }
 832                                         cp = convbuf;
 833                                 }
 834                         } else if ((cp = GETARG(char *)) == NULL)
 835                                 cp = "(null)";
 836                         size = (prec >= 0) ? strnlen(cp, prec) : strlen(cp);
 837                         sign = '\0';
 838                         break;
 839                 case 'U':
 840                         flags |= LONGINT;
 841                         /*FALLTHROUGH*/
 842                 case 'u':
 843                         if (flags & INTMAX_SIZE)
 844                                 ujval = UJARG();
 845                         else
 846                                 ulval = UARG();
 847                         base = 10;
 848                         goto nosign;
 849                 case 'X':
 850                         xdigs = xdigs_upper;
 851                         goto hex;
 852                 case 'x':
 853                         xdigs = xdigs_lower;
 854 hex:
 855                         if (flags & INTMAX_SIZE)
 856                                 ujval = UJARG();
 857                         else
 858                                 ulval = UARG();
 859                         base = 16;
 860                         /* leading 0x/X only if non-zero */
 861                         if (flags & ALT &&
 862                             (flags & INTMAX_SIZE ? ujval != 0 : ulval != 0))
 863                                 ox[1] = ch;
 864
 865                         flags &= ~GROUPING;
 866                         /* unsigned conversions */
 867 nosign:                 sign = '\0';
 868                         /*-
 869                          * ``... diouXx conversions ... if a precision is
 870                          * specified, the 0 flag will be ignored.''
 871                          *      -- ANSI X3J11
 872                          */
 873 number:                 if ((dprec = prec) >= 0)
 874                                 flags &= ~ZEROPAD;
 875
 876                         /*-
 877                          * ``The result of converting a zero value with an
 878                          * explicit precision of zero is no characters.''
 879                          *      -- ANSI X3J11
 880                          *
 881                          * ``The C Standard is clear enough as is.  The call
 882                          * printf("%#.0o", 0) should print 0.''
 883                          *      -- Defect Report #151
 884                          */
 885                         cp = buf + BUF;
 886                         if (flags & INTMAX_SIZE) {
 887                                 if (ujval != 0 || prec != 0 ||
 888                                     (flags & ALT && base == 8))
 889                                         cp = __ujtoa(ujval, cp, base,
 890                                             flags & ALT, xdigs);
 891                         } else {
 892                                 if (ulval != 0 || prec != 0 ||
 893                                     (flags & ALT && base == 8))
 894                                         cp = __ultoa(ulval, cp, base,
 895                                             flags & ALT, xdigs);
 896                         }
 897                         size = buf + BUF - cp;
 898                         if (size > BUF) /* should never happen */
 899                                 abort();
 900                         if ((flags & GROUPING) && size != 0)
 901                                 size += grouping_init(&gs, size, locale);
 902                         break;
 903                 default:        /* "%?" prints ?, unless ? is NUL */
 904                         if (ch == '\0')
 905                                 goto done;
 906                         /* pretend it was %c with argument ch */
 907                         cp = buf;
 908                         *cp = ch;
 909                         size = 1;
 910                         sign = '\0';
 911                         break;
 912                 }
 913
 914                 /*
 915                  * All reasonable formats wind up here.  At this point, `cp'
 916                  * points to a string which (if not flags&LADJUST) should be
 917                  * padded out to `width' places.  If flags&ZEROPAD, it should
 918                  * first be prefixed by any sign or other prefix; otherwise,
 919                  * it should be blank padded before the prefix is emitted.
 920                  * After any left-hand padding and prefixing, emit zeroes
 921                  * required by a decimal [diouxX] precision, then print the
 922                  * string proper, then emit zeroes required by any leftover
 923                  * floating precision; finally, if LADJUST, pad with blanks.
 924                  *
 925                  * Compute actual size, so we know how much to pad.
 926                  * size excludes decimal prec; realsz includes it.
 927                  */
 928                 realsz = dprec > size ? dprec : size;
 929                 if (sign)
 930                         realsz++;
 931                 if (ox[1])
 932                         realsz += 2;
 933
 934                 prsize = width > realsz ? width : realsz;
 935                 if ((unsigned)ret + prsize > INT_MAX) {
 936                         ret = EOF;
 937                         errno = EOVERFLOW;
 938                         goto error;
 939                 }
 940
 941                 /* right-adjusting blank padding */
 942                 if ((flags & (LADJUST|ZEROPAD)) == 0)
 943                         PAD(width - realsz, blanks);
 944
 945                 /* prefix */
 946                 if (sign)
 947                         PRINT(&sign, 1);
 948
 949                 if (ox[1]) {    /* ox[1] is either x, X, or \0 */
 950                         ox[0] = '0';
 951                         PRINT(ox, 2);
 952                 }
 953
 954                 /* right-adjusting zero padding */
 955                 if ((flags & (LADJUST|ZEROPAD)) == ZEROPAD)
 956                         PAD(width - realsz, zeroes);
 957
 958                 /* the string or number proper */
 959 #ifndef NO_FLOATING_POINT
 960                 if ((flags & FPT) == 0) {
 961 #endif
 962                         /* leading zeroes from decimal precision */
 963                         PAD(dprec - size, zeroes);
 964                         if (gs.grouping) {
 965                                 if (grouping_print(&gs, &io, cp, buf+BUF, locale) < 0)
 966                                         goto error;
 967                         } else {
 968                                 PRINT(cp, size);
 969                         }
 970 #ifndef NO_FLOATING_POINT
 971                 } else {        /* glue together f_p fragments */
 972                         if (!expchar) { /* %[fF] or sufficiently short %[gG] */
 973                                 if (expt <= 0) {
 974                                         PRINT(zeroes, 1);
 975                                         if (prec || flags & ALT)
 976                                                 PRINT(decimal_point,decpt_len);
 977                                         PAD(-expt, zeroes);
 978                                         /* already handled initial 0's */
 979                                         prec += expt;
 980                                 } else {
 981                                         if (gs.grouping) {
 982                                                 n = grouping_print(&gs, &io,
 983                                                     cp, dtoaend, locale);
 984                                                 if (n < 0)
 985                                                         goto error;
 986                                                 cp += n;
 987                                         } else {
 988                                                 PRINTANDPAD(cp, dtoaend,
 989                                                     expt, zeroes);
 990                                                 cp += expt;
 991                                         }
 992                                         if (prec || flags & ALT)
 993                                                 PRINT(decimal_point,decpt_len);
 994                                 }
 995                                 PRINTANDPAD(cp, dtoaend, prec, zeroes);
 996                         } else {        /* %[eE] or sufficiently long %[gG] */
 997                                 if (prec > 1 || flags & ALT) {
 998                                         PRINT(cp++, 1);
 999                                         PRINT(decimal_point, decpt_len);
1000                                         PRINT(cp, ndig-1);
1001                                         PAD(prec - ndig, zeroes);
1002                                 } else  /* XeYYY */
1003                                         PRINT(cp, 1);
1004                                 PRINT(expstr, expsize);
1005                         }
1006                 }
1007 #endif
1008                 /* left-adjusting padding (always blank) */
1009                 if (flags & LADJUST)
1010                         PAD(width - realsz, blanks);
1011
1012                 /* finally, adjust ret */
1013                 ret += prsize;
1014
1015                 FLUSH();        /* copy out the I/O vectors */
1016         }
1017 done:
1018         FLUSH();
1019 error:
1020         va_end(orgap);
1021 #ifndef NO_FLOATING_POINT
1022         if (dtoaresult != NULL)
1023                 freedtoa(dtoaresult);
1024 #endif
1025         if (convbuf != NULL)
1026                 free(convbuf);
1027         if (__sferror(fp))
1028                 ret = EOF;
1029         if ((argtable != NULL) && (argtable != statargtable))
1030                 free (argtable);
1031         return (ret);
1032         /* NOTREACHED */
1033 }
1034