glib/gnulib/vasnprintf.c

   1 /* vsprintf with automatic memory allocation.
   2    Copyright (C) 1999, 2002-2003 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify it
   5    under the terms of the GNU Library General Public License as published
   6    by the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17    USA.  */
  18
  19 /* Tell glibc's <stdio.h> to provide a prototype for snprintf().
  20    This must come before <config.h> because <config.h> may include
  21    <features.h>, and once <features.h> has been included, it's too late.  */
  22 #ifndef _GNU_SOURCE
  23 # define _GNU_SOURCE    1
  24 #endif
  25
  26 #ifdef HAVE_CONFIG_H
  27 # include <config.h>
  28 #endif
  29 #include "glib/galloca.h"
  30
  31 #include "g-gnulib.h"
  32
  33 /* Specification.  */
  34 #include "vasnprintf.h"
  35
  36 #include <stdio.h>      /* snprintf(), sprintf() */
  37 #include <stdlib.h>     /* abort(), malloc(), realloc(), free() */
  38 #include <string.h>     /* memcpy(), strlen() */
  39 #include <errno.h>      /* errno */
  40 #include <limits.h>     /* CHAR_BIT */
  41 #include <float.h>      /* DBL_MAX_EXP, LDBL_MAX_EXP */
  42 #include "printf-parse.h"
  43
  44 /* For those losing systems which don't have 'alloca' we have to add
  45    some additional code emulating it.  */
  46 #ifdef HAVE_ALLOCA
  47 # define freea(p) /* nothing */
  48 #else
  49 # define alloca(n) malloc (n)
  50 # define freea(p) free (p)
  51 #endif
  52
  53 #ifndef HAVE_LONG_LONG_FORMAT
  54 static int
  55 print_long_long (char *buf,
  56                  int len,
  57                  int width,
  58                  int precision,
  59                  unsigned long flags,
  60                  char conversion,
  61                  unsigned long long number)
  62 {
  63   int negative = FALSE;
  64   char buffer[128];
  65   char *bufferend;
  66   char *pointer;
  67   int base;
  68   static const char *upper = "0123456789ABCDEFX";
  69   static const char *lower = "0123456789abcdefx";
  70   const char *digits;
  71   int i;
  72   char *p;
  73   int count;
  74
  75 #define EMIT(c)           \
  76   if (p - buf == len - 1) \
  77     {                     \
  78       *p++ = '\0';        \
  79       return len;         \
  80     }                     \
  81   else                    \
  82     *p++ = c;
  83
  84   p = buf;
  85
  86   switch (conversion)
  87     {
  88     case 'o':
  89       base = 8;
  90       digits = lower;
  91       negative = FALSE;
  92       break;
  93     case 'x':
  94       base = 16;
  95       digits = lower;
  96       negative = FALSE;
  97       break;
  98     case 'X':
  99       base = 16;
 100       digits = upper;
 101       negative = FALSE;
 102       break;
 103     default:
 104       base = 10;
 105       digits = lower;
 106       negative = (long long)number < 0;
 107       if (negative)
 108         number = -((long long)number);
 109       break;
 110     }
 111
 112   /* Build number */
 113   pointer = bufferend = &buffer[sizeof(buffer) - 1];
 114   *pointer-- = '\0';
 115   for (i = 1; i < (int)sizeof(buffer); i++)
 116     {
 117       *pointer-- = digits[number % base];
 118       number /= base;
 119       if (number == 0)
 120         break;
 121     }
 122
 123   /* Adjust width */
 124   width -= (bufferend - pointer) - 1;
 125
 126   /* Adjust precision */
 127   if (precision != -1)
 128     {
 129       precision -= (bufferend - pointer) - 1;
 130       if (precision < 0)
 131         precision = 0;
 132       flags |= FLAG_ZERO;
 133     }
 134
 135   /* Adjust width further */
 136   if (negative || (flags & FLAG_SHOWSIGN) || (flags & FLAG_SPACE))
 137     width--;
 138   if (flags & FLAG_ALT)
 139     {
 140       switch (base)
 141         {
 142         case 16:
 143           width -= 2;
 144           break;
 145         case 8:
 146           width--;
 147           break;
 148         default:
 149           break;
 150         }
 151     }
 152
 153   /* Output prefixes spaces if needed */
 154   if (! ((flags & FLAG_LEFT) ||
 155          ((flags & FLAG_ZERO) && (precision == -1))))
 156     {
 157       count = (precision == -1) ? 0 : precision;
 158       while (width-- > count)
 159         *p++ = ' ';
 160     }
 161
 162   /* width has been adjusted for signs and alternatives */
 163   if (negative)
 164     {
 165       EMIT ('-');
 166     }
 167   else if (flags & FLAG_SHOWSIGN)
 168     {
 169       EMIT('+');
 170     }
 171   else if (flags & FLAG_SPACE)
 172     {
 173       EMIT(' ');
 174     }
 175
 176   if (flags & FLAG_ALT)
 177     {
 178       switch (base)
 179         {
 180         case 8:
 181           EMIT('0');
 182           break;
 183         case 16:
 184           EMIT('0');
 185           EMIT(digits[16]);
 186           break;
 187         default:
 188           break;
 189         } /* switch base */
 190     }
 191
 192   /* Output prefixed zero padding if needed */
 193   if (flags & FLAG_ZERO)
 194     {
 195       if (precision == -1)
 196         precision = width;
 197       while (precision-- > 0)
 198         {
 199           EMIT('0');
 200           width--;
 201         }
 202     }
 203
 204   /* Output the number itself */
 205   while (*(++pointer))
 206     {
 207       EMIT(*pointer);
 208     }
 209
 210   /* Output trailing spaces if needed */
 211   if (flags & FLAG_LEFT)
 212     {
 213       while (width-- > 0)
 214         EMIT(' ');
 215     }
 216
 217   EMIT('\0');
 218
 219   return p - buf - 1;
 220 }
 221 #endif
 222
 223 char *
 224 vasnprintf (char *resultbuf, size_t *lengthp, const char *format, va_list args)
 225 {
 226   char_directives d;
 227   arguments a;
 228
 229   if (printf_parse (format, &d, &a) < 0)
 230     {
 231       errno = EINVAL;
 232       return NULL;
 233     }
 234
 235 #define CLEANUP() \
 236   free (d.dir);                                                         \
 237   if (a.arg)                                                            \
 238     free (a.arg);
 239
 240   if (printf_fetchargs (args, &a) < 0)
 241     {
 242       CLEANUP ();
 243       errno = EINVAL;
 244       return NULL;
 245     }
 246
 247   {
 248     char *buf =
 249       (char *) alloca (7 + d.max_width_length + d.max_precision_length + 6);
 250     const char *cp;
 251     unsigned int i;
 252     char_directive *dp;
 253     /* Output string accumulator.  */
 254     char *result;
 255     size_t allocated;
 256     size_t length;
 257
 258     if (resultbuf != NULL)
 259       {
 260         result = resultbuf;
 261         allocated = *lengthp;
 262       }
 263     else
 264       {
 265         result = NULL;
 266         allocated = 0;
 267       }
 268     length = 0;
 269     /* Invariants:
 270        result is either == resultbuf or == NULL or malloc-allocated.
 271        If length > 0, then result != NULL.  */
 272
 273 #define ENSURE_ALLOCATION(needed) \
 274     if ((needed) > allocated)                                           \
 275       {                                                                 \
 276         char *memory;                                                   \
 277                                                                         \
 278         allocated = (allocated > 0 ? 2 * allocated : 12);               \
 279         if ((needed) > allocated)                                       \
 280           allocated = (needed);                                         \
 281         if (result == resultbuf || result == NULL)                      \
 282           memory = (char *) malloc (allocated);                         \
 283         else                                                            \
 284           memory = (char *) realloc (result, allocated);                \
 285                                                                         \
 286         if (memory == NULL)                                             \
 287           {                                                             \
 288             if (!(result == resultbuf || result == NULL))               \
 289               free (result);                                            \
 290             freea (buf);                                                \
 291             CLEANUP ();                                                 \
 292             errno = ENOMEM;                                             \
 293             return NULL;                                                \
 294           }                                                             \
 295         if (result == resultbuf && length > 0)                          \
 296           memcpy (memory, result, length);                              \
 297         result = memory;                                                \
 298       }
 299
 300     for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++)
 301       {
 302         if (cp != dp->dir_start)
 303           {
 304             size_t n = dp->dir_start - cp;
 305
 306             ENSURE_ALLOCATION (length + n);
 307             memcpy (result + length, cp, n);
 308             length += n;
 309           }
 310         if (i == d.count)
 311           break;
 312
 313         /* Execute a single directive.  */
 314         if (dp->conversion == '%')
 315           {
 316             if (!(dp->arg_index < 0))
 317               abort ();
 318             ENSURE_ALLOCATION (length + 1);
 319             result[length] = '%';
 320             length += 1;
 321           }
 322         else
 323           {
 324             if (!(dp->arg_index >= 0))
 325               abort ();
 326
 327             if (dp->conversion == 'n')
 328               {
 329                 switch (a.arg[dp->arg_index].type)
 330                   {
 331                   case TYPE_COUNT_SCHAR_POINTER:
 332                     *a.arg[dp->arg_index].a.a_count_schar_pointer = length;
 333                     break;
 334                   case TYPE_COUNT_SHORT_POINTER:
 335                     *a.arg[dp->arg_index].a.a_count_short_pointer = length;
 336                     break;
 337                   case TYPE_COUNT_INT_POINTER:
 338                     *a.arg[dp->arg_index].a.a_count_int_pointer = length;
 339                     break;
 340                   case TYPE_COUNT_LONGINT_POINTER:
 341                     *a.arg[dp->arg_index].a.a_count_longint_pointer = length;
 342                     break;
 343 #ifdef HAVE_LONG_LONG
 344                   case TYPE_COUNT_LONGLONGINT_POINTER:
 345                     *a.arg[dp->arg_index].a.a_count_longlongint_pointer = length;
 346                     break;
 347 #endif
 348                   default:
 349                     abort ();
 350                   }
 351               }
 352             else
 353               {
 354                 arg_type type = a.arg[dp->arg_index].type;
 355                 char *p;
 356                 unsigned int prefix_count;
 357                 int prefixes[2];
 358 #if !HAVE_SNPRINTF
 359                 unsigned int tmp_length;
 360                 char tmpbuf[700];
 361                 char *tmp;
 362
 363                 /* Allocate a temporary buffer of sufficient size for calling
 364                    sprintf.  */
 365                 {
 366                   unsigned int width;
 367                   unsigned int precision;
 368
 369                   width = 0;
 370                   if (dp->width_start != dp->width_end)
 371                     {
 372                       if (dp->width_arg_index >= 0)
 373                         {
 374                           int arg;
 375
 376                           if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
 377                             abort ();
 378                           arg = a.arg[dp->width_arg_index].a.a_int;
 379                           width = (arg < 0 ? -arg : arg);
 380                         }
 381                       else
 382                         {
 383                           const char *digitp = dp->width_start;
 384
 385                           do
 386                             width = width * 10 + (*digitp++ - '0');
 387                           while (digitp != dp->width_end);
 388                         }
 389                     }
 390
 391                   precision = 6;
 392                   if (dp->precision_start != dp->precision_end)
 393                     {
 394                       if (dp->precision_arg_index >= 0)
 395                         {
 396                           int arg;
 397
 398                           if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
 399                             abort ();
 400                           arg = a.arg[dp->precision_arg_index].a.a_int;
 401                           precision = (arg < 0 ? 0 : arg);
 402                         }
 403                       else
 404                         {
 405                           const char *digitp = dp->precision_start + 1;
 406
 407                           precision = 0;
 408                           while (digitp != dp->precision_end)
 409                             precision = precision * 10 + (*digitp++ - '0');
 410                         }
 411                     }
 412
 413                   switch (dp->conversion)
 414                     {
 415                     case 'd': case 'i': case 'u':
 416 # ifdef HAVE_LONG_LONG
 417                       if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
 418                         tmp_length =
 419                           (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
 420                                           * 0.30103 /* binary -> decimal */
 421                                           * 2 /* estimate for FLAG_GROUP */
 422                                          )
 423                           + 1 /* turn floor into ceil */
 424                           + 1; /* account for leading sign */
 425                       else
 426 # endif
 427                       if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
 428                         tmp_length =
 429                           (unsigned int) (sizeof (unsigned long) * CHAR_BIT
 430                                           * 0.30103 /* binary -> decimal */
 431                                           * 2 /* estimate for FLAG_GROUP */
 432                                          )
 433                           + 1 /* turn floor into ceil */
 434                           + 1; /* account for leading sign */
 435                       else
 436                         tmp_length =
 437                           (unsigned int) (sizeof (unsigned int) * CHAR_BIT
 438                                           * 0.30103 /* binary -> decimal */
 439                                           * 2 /* estimate for FLAG_GROUP */
 440                                          )
 441                           + 1 /* turn floor into ceil */
 442                           + 1; /* account for leading sign */
 443                       break;
 444
 445                     case 'o':
 446 # ifdef HAVE_LONG_LONG
 447                       if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
 448                         tmp_length =
 449                           (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
 450                                           * 0.333334 /* binary -> octal */
 451                                          )
 452                           + 1 /* turn floor into ceil */
 453                           + 1; /* account for leading sign */
 454                       else
 455 # endif
 456                       if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
 457                         tmp_length =
 458                           (unsigned int) (sizeof (unsigned long) * CHAR_BIT
 459                                           * 0.333334 /* binary -> octal */
 460                                          )
 461                           + 1 /* turn floor into ceil */
 462                           + 1; /* account for leading sign */
 463                       else
 464                         tmp_length =
 465                           (unsigned int) (sizeof (unsigned int) * CHAR_BIT
 466                                           * 0.333334 /* binary -> octal */
 467                                          )
 468                           + 1 /* turn floor into ceil */
 469                           + 1; /* account for leading sign */
 470                       break;
 471
 472                     case 'x': case 'X':
 473 # ifdef HAVE_LONG_LONG
 474                       if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
 475                         tmp_length =
 476                           (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
 477                                           * 0.25 /* binary -> hexadecimal */
 478                                          )
 479                           + 1 /* turn floor into ceil */
 480                           + 2; /* account for leading sign or alternate form */
 481                       else
 482 # endif
 483                       if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
 484                         tmp_length =
 485                           (unsigned int) (sizeof (unsigned long) * CHAR_BIT
 486                                           * 0.25 /* binary -> hexadecimal */
 487                                          )
 488                           + 1 /* turn floor into ceil */
 489                           + 2; /* account for leading sign or alternate form */
 490                       else
 491                         tmp_length =
 492                           (unsigned int) (sizeof (unsigned int) * CHAR_BIT
 493                                           * 0.25 /* binary -> hexadecimal */
 494                                          )
 495                           + 1 /* turn floor into ceil */
 496                           + 2; /* account for leading sign or alternate form */
 497                       break;
 498
 499                     case 'f': case 'F':
 500 # ifdef HAVE_LONG_DOUBLE
 501                       if (type == TYPE_LONGDOUBLE)
 502                         tmp_length =
 503                           (unsigned int) (LDBL_MAX_EXP
 504                                           * 0.30103 /* binary -> decimal */
 505                                           * 2 /* estimate for FLAG_GROUP */
 506                                          )
 507                           + 1 /* turn floor into ceil */
 508                           + precision
 509                           + 10; /* sign, decimal point etc. */
 510                       else
 511 # endif
 512                         tmp_length =
 513                           (unsigned int) (DBL_MAX_EXP
 514                                           * 0.30103 /* binary -> decimal */
 515                                           * 2 /* estimate for FLAG_GROUP */
 516                                          )
 517                           + 1 /* turn floor into ceil */
 518                           + precision
 519                           + 10; /* sign, decimal point etc. */
 520                       break;
 521
 522                     case 'e': case 'E': case 'g': case 'G':
 523                     case 'a': case 'A':
 524                       tmp_length =
 525                         precision
 526                         + 12; /* sign, decimal point, exponent etc. */
 527                       break;
 528
 529                     case 'c':
 530 # ifdef HAVE_WINT_T
 531                       if (type == TYPE_WIDE_CHAR)
 532                         tmp_length = MB_CUR_MAX;
 533                       else
 534 # endif
 535                         tmp_length = 1;
 536                       break;
 537
 538                     case 's':
 539 # ifdef HAVE_WCHAR_T
 540                       if (type == TYPE_WIDE_STRING)
 541                         tmp_length =
 542                           wcslen (a.arg[dp->arg_index].a.a_wide_string)
 543                           * MB_CUR_MAX;
 544                       else
 545 # endif
 546                         tmp_length = strlen (a.arg[dp->arg_index].a.a_string);
 547                       break;
 548
 549                     case 'p':
 550                       tmp_length =
 551                         (unsigned int) (sizeof (void *) * CHAR_BIT
 552                                         * 0.25 /* binary -> hexadecimal */
 553                                        )
 554                           + 1 /* turn floor into ceil */
 555                           + 2; /* account for leading 0x */
 556                       break;
 557
 558                     default:
 559                       abort ();
 560                     }
 561
 562                   if (tmp_length < width)
 563                     tmp_length = width;
 564
 565                   tmp_length++; /* account for trailing NUL */
 566                 }
 567
 568                 if (tmp_length <= sizeof (tmpbuf))
 569                   tmp = tmpbuf;
 570                 else
 571                   {
 572                     tmp = (char *) malloc (tmp_length);
 573                     if (tmp == NULL)
 574                       {
 575                         /* Out of memory.  */
 576                         if (!(result == resultbuf || result == NULL))
 577                           free (result);
 578                         freea (buf);
 579                         CLEANUP ();
 580                         errno = ENOMEM;
 581                         return NULL;
 582                       }
 583                   }
 584 #endif
 585
 586                 /* Construct the format string for calling snprintf or
 587                    sprintf.  */
 588                 p = buf;
 589                 *p++ = '%';
 590                 if (dp->flags & FLAG_GROUP)
 591                   *p++ = '\'';
 592                 if (dp->flags & FLAG_LEFT)
 593                   *p++ = '-';
 594                 if (dp->flags & FLAG_SHOWSIGN)
 595                   *p++ = '+';
 596                 if (dp->flags & FLAG_SPACE)
 597                   *p++ = ' ';
 598                 if (dp->flags & FLAG_ALT)
 599                   *p++ = '#';
 600                 if (dp->flags & FLAG_ZERO)
 601                   *p++ = '0';
 602                 if (dp->width_start != dp->width_end)
 603                   {
 604                     size_t n = dp->width_end - dp->width_start;
 605                     memcpy (p, dp->width_start, n);
 606                     p += n;
 607                   }
 608                 if (dp->precision_start != dp->precision_end)
 609                   {
 610                     size_t n = dp->precision_end - dp->precision_start;
 611                     memcpy (p, dp->precision_start, n);
 612                     p += n;
 613                   }
 614
 615                 switch (type)
 616                   {
 617 #ifdef HAVE_INT64_AND_I64
 618                   case TYPE_INT64:
 619                   case TYPE_UINT64:
 620                     *p++ = 'I';
 621                     *p++ = '6';
 622                     *p++ = '4';
 623                     break;
 624 #endif
 625 #ifdef HAVE_LONG_LONG
 626                   case TYPE_LONGLONGINT:
 627                   case TYPE_ULONGLONGINT:
 628 #ifdef HAVE_INT64_AND_I64       /* The system (sn)printf uses %I64. Also assume
 629                                  * that long long == __int64.
 630                                  */
 631                     *p++ = 'I';
 632                     *p++ = '6';
 633                     *p++ = '4';
 634                     break;
 635 #else
 636                     *p++ = 'l';
 637                     /*FALLTHROUGH*/
 638 #endif
 639 #endif
 640                   case TYPE_LONGINT:
 641                   case TYPE_ULONGINT:
 642 #ifdef HAVE_WINT_T
 643                   case TYPE_WIDE_CHAR:
 644 #endif
 645 #ifdef HAVE_WCHAR_T
 646                   case TYPE_WIDE_STRING:
 647 #endif
 648                     *p++ = 'l';
 649                     break;
 650 #ifdef HAVE_LONG_DOUBLE
 651                   case TYPE_LONGDOUBLE:
 652                     *p++ = 'L';
 653                     break;
 654 #endif
 655                   default:
 656                     break;
 657                   }
 658                 *p = dp->conversion;
 659 #if HAVE_SNPRINTF
 660                 p[1] = '%';
 661                 p[2] = 'n';
 662                 p[3] = '\0';
 663 #else
 664                 p[1] = '\0';
 665 #endif
 666
 667                 /* Construct the arguments for calling snprintf or sprintf.  */
 668                 prefix_count = 0;
 669                 if (dp->width_arg_index >= 0)
 670                   {
 671                     if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
 672                       abort ();
 673                     prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
 674                   }
 675                 if (dp->precision_arg_index >= 0)
 676                   {
 677                     if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
 678                       abort ();
 679                     prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
 680                   }
 681
 682 #if HAVE_SNPRINTF
 683                 /* Prepare checking whether snprintf returns the count
 684                    via %n.  */
 685                 ENSURE_ALLOCATION (length + 1);
 686                 result[length] = '\0';
 687 #endif
 688
 689                 for (;;)
 690                   {
 691                     size_t maxlen;
 692                     int count;
 693                     int retcount;
 694
 695                     maxlen = allocated - length;
 696                     count = -1;
 697                     retcount = 0;
 698
 699 #if HAVE_SNPRINTF
 700 #define SNPRINTF_BUF(arg) \
 701                     switch (prefix_count)                                   \
 702                       {                                                     \
 703                       case 0:                                               \
 704                         retcount = snprintf (result + length, maxlen, buf,  \
 705                                              arg, &count);                  \
 706                         break;                                              \
 707                       case 1:                                               \
 708                         retcount = snprintf (result + length, maxlen, buf,  \
 709                                              prefixes[0], arg, &count);     \
 710                         break;                                              \
 711                       case 2:                                               \
 712                         retcount = snprintf (result + length, maxlen, buf,  \
 713                                              prefixes[0], prefixes[1], arg, \
 714                                              &count);                       \
 715                         break;                                              \
 716                       default:                                              \
 717                         abort ();                                           \
 718                       }
 719 #else
 720 #define SNPRINTF_BUF(arg) \
 721                     switch (prefix_count)                                   \
 722                       {                                                     \
 723                       case 0:                                               \
 724                         count = sprintf (tmp, buf, arg);                    \
 725                         break;                                              \
 726                       case 1:                                               \
 727                         count = sprintf (tmp, buf, prefixes[0], arg);       \
 728                         break;                                              \
 729                       case 2:                                               \
 730                         count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
 731                                          arg);                              \
 732                         break;                                              \
 733                       default:                                              \
 734                         abort ();                                           \
 735                       }
 736 #endif
 737
 738                     switch (type)
 739                       {
 740                       case TYPE_SCHAR:
 741                         {
 742                           int arg = a.arg[dp->arg_index].a.a_schar;
 743                           SNPRINTF_BUF (arg);
 744                         }
 745                         break;
 746                       case TYPE_UCHAR:
 747                         {
 748                           unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
 749                           SNPRINTF_BUF (arg);
 750                         }
 751                         break;
 752                       case TYPE_SHORT:
 753                         {
 754                           int arg = a.arg[dp->arg_index].a.a_short;
 755                           SNPRINTF_BUF (arg);
 756                         }
 757                         break;
 758                       case TYPE_USHORT:
 759                         {
 760                           unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
 761                           SNPRINTF_BUF (arg);
 762                         }
 763                         break;
 764                       case TYPE_INT:
 765                         {
 766                           int arg = a.arg[dp->arg_index].a.a_int;
 767                           SNPRINTF_BUF (arg);
 768                         }
 769                         break;
 770                       case TYPE_UINT:
 771                         {
 772                           unsigned int arg = a.arg[dp->arg_index].a.a_uint;
 773                           SNPRINTF_BUF (arg);
 774                         }
 775                         break;
 776                       case TYPE_LONGINT:
 777                         {
 778                           long int arg = a.arg[dp->arg_index].a.a_longint;
 779                           SNPRINTF_BUF (arg);
 780                         }
 781                         break;
 782                       case TYPE_ULONGINT:
 783                         {
 784                           unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
 785                           SNPRINTF_BUF (arg);
 786                         }
 787                         break;
 788 #ifdef HAVE_INT64_AND_I64
 789                       case TYPE_INT64:
 790                         {
 791                           __int64 arg = a.arg[dp->arg_index].a.a_int64;
 792                           SNPRINTF_BUF (arg);
 793                         }
 794                         break;
 795                       case TYPE_UINT64:
 796                         {
 797                           unsigned __int64 arg = a.arg[dp->arg_index].a.a_uint64;
 798                           SNPRINTF_BUF (arg);
 799                         }
 800                         break;
 801 #endif
 802 #ifdef HAVE_LONG_LONG
 803 #ifndef HAVE_LONG_LONG_FORMAT
 804                       case TYPE_LONGLONGINT:
 805                       case TYPE_ULONGLONGINT:
 806                         {
 807                           unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
 808                           int width;
 809                           int precision;
 810
 811                           width = 0;
 812                           if (dp->width_start != dp->width_end)
 813                             {
 814                               if (dp->width_arg_index >= 0)
 815                                 {
 816                                   int arg;
 817
 818                                   if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
 819                                     abort ();
 820                                   arg = a.arg[dp->width_arg_index].a.a_int;
 821                                   width = (arg < 0 ? -arg : arg);
 822                                 }
 823                               else
 824                                 {
 825                                   const char *digitp = dp->width_start;
 826
 827                                   do
 828                                     width = width * 10 + (*digitp++ - '0');
 829                                   while (digitp != dp->width_end);
 830                                 }
 831                             }
 832
 833                           precision = -1;
 834                           if (dp->precision_start != dp->precision_end)
 835                             {
 836                               if (dp->precision_arg_index >= 0)
 837                                 {
 838                                   int arg;
 839
 840                                   if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
 841                                     abort ();
 842                                   arg = a.arg[dp->precision_arg_index].a.a_int;
 843                                   precision = (arg < 0 ? 0 : arg);
 844                                 }
 845                               else
 846                                 {
 847                                   const char *digitp = dp->precision_start + 1;
 848
 849                                   precision = 0;
 850                                   do
 851                                     precision = precision * 10 + (*digitp++ - '0');
 852                                   while (digitp != dp->precision_end);
 853                                 }
 854                             }
 855
 856                           count = print_long_long (result + length, maxlen,
 857                                                    width, precision,
 858                                                    dp->flags,
 859                                                    dp->conversion,
 860                                                    arg);
 861                         }
 862                         break;
 863 #else
 864                       case TYPE_LONGLONGINT:
 865                         {
 866                           long long int arg = a.arg[dp->arg_index].a.a_longlongint;
 867                           SNPRINTF_BUF (arg);
 868                         }
 869                         break;
 870                       case TYPE_ULONGLONGINT:
 871                         {
 872                           unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
 873                           SNPRINTF_BUF (arg);
 874                         }
 875                         break;
 876 #endif
 877 #endif
 878                       case TYPE_DOUBLE:
 879                         {
 880                           double arg = a.arg[dp->arg_index].a.a_double;
 881                           SNPRINTF_BUF (arg);
 882                         }
 883                         break;
 884 #ifdef HAVE_LONG_DOUBLE
 885                       case TYPE_LONGDOUBLE:
 886                         {
 887                           long double arg = a.arg[dp->arg_index].a.a_longdouble;
 888                           SNPRINTF_BUF (arg);
 889                         }
 890                         break;
 891 #endif
 892                       case TYPE_CHAR:
 893                         {
 894                           int arg = a.arg[dp->arg_index].a.a_char;
 895                           SNPRINTF_BUF (arg);
 896                         }
 897                         break;
 898 #ifdef HAVE_WINT_T
 899                       case TYPE_WIDE_CHAR:
 900                         {
 901                           wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
 902                           SNPRINTF_BUF (arg);
 903                         }
 904                         break;
 905 #endif
 906                       case TYPE_STRING:
 907                         {
 908                           const char *arg = a.arg[dp->arg_index].a.a_string;
 909                           SNPRINTF_BUF (arg);
 910                         }
 911                         break;
 912 #ifdef HAVE_WCHAR_T
 913                       case TYPE_WIDE_STRING:
 914                         {
 915                           const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
 916                           SNPRINTF_BUF (arg);
 917                         }
 918                         break;
 919 #endif
 920                       case TYPE_POINTER:
 921                         {
 922                           void *arg = a.arg[dp->arg_index].a.a_pointer;
 923                           SNPRINTF_BUF (arg);
 924                         }
 925                         break;
 926                       default:
 927                         abort ();
 928                       }
 929
 930 #if HAVE_SNPRINTF
 931                     /* Portability: Not all implementations of snprintf()
 932                        are ISO C 99 compliant.  Determine the number of
 933                        bytes that snprintf() has produced or would have
 934                        produced.  */
 935                     if (count >= 0)
 936                       {
 937                         /* Verify that snprintf() has NUL-terminated its
 938                            result.  */
 939                         if (count < maxlen && result[length + count] != '\0')
 940                           abort ();
 941                         /* Portability hack.  */
 942                         if (retcount > count)
 943                           count = retcount;
 944                       }
 945                     else
 946                       {
 947                         /* snprintf() doesn't understand the '%n'
 948                            directive.  */
 949                         if (p[1] != '\0')
 950                           {
 951                             /* Don't use the '%n' directive; instead, look
 952                                at the snprintf() return value.  */
 953                             p[1] = '\0';
 954                             continue;
 955                           }
 956                         count = retcount;
 957                       }
 958 #endif
 959
 960                     /* Attempt to handle failure.  */
 961                     if (count < 0)
 962                       {
 963                         if (!(result == resultbuf || result == NULL))
 964                           free (result);
 965                         freea (buf);
 966                         CLEANUP ();
 967                         errno = EINVAL;
 968                         return NULL;
 969                       }
 970
 971 #if !HAVE_SNPRINTF
 972                     if (count >= tmp_length)
 973                       /* tmp_length was incorrectly calculated - fix the
 974                          code above!  */
 975                       abort ();
 976 #endif
 977
 978                     /* Make room for the result.  */
 979                     if (count >= maxlen)
 980                       {
 981                         /* Need at least count bytes.  But allocate
 982                            proportionally, to avoid looping eternally if
 983                            snprintf() reports a too small count.  */
 984                         size_t n = length + count;
 985
 986                         if (n < 2 * allocated)
 987                           n = 2 * allocated;
 988
 989                         ENSURE_ALLOCATION (n);
 990 #if HAVE_SNPRINTF
 991                         continue;
 992 #endif
 993                       }
 994
 995 #if HAVE_SNPRINTF
 996                     /* The snprintf() result did fit.  */
 997 #else
 998                     /* Append the sprintf() result.  */
 999                     memcpy (result + length, tmp, count);
1000                     if (tmp != tmpbuf)
1001                       free (tmp);
1002 #endif
1003
1004                     length += count;
1005                     break;
1006                   }
1007               }
1008           }
1009       }
1010
1011     /* Add the final NUL.  */
1012     ENSURE_ALLOCATION (length + 1);
1013     result[length] = '\0';
1014
1015     if (result != resultbuf && length + 1 < allocated)
1016       {
1017         /* Shrink the allocated memory if possible.  */
1018         char *memory;
1019
1020         memory = (char *) realloc (result, length + 1);
1021         if (memory != NULL)
1022           result = memory;
1023       }
1024
1025     freea (buf);
1026     CLEANUP ();
1027     *lengthp = length;
1028     return result;
1029   }
1030 }