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                           do
 409                             precision = precision * 10 + (*digitp++ - '0');
 410                           while (digitp != dp->precision_end);
 411                         }
 412                     }
 413
 414                   switch (dp->conversion)
 415                     {
 416                     case 'd': case 'i': case 'u':
 417 # ifdef HAVE_LONG_LONG
 418                       if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
 419                         tmp_length =
 420                           (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
 421                                           * 0.30103 /* binary -> decimal */
 422                                           * 2 /* estimate for FLAG_GROUP */
 423                                          )
 424                           + 1 /* turn floor into ceil */
 425                           + 1; /* account for leading sign */
 426                       else
 427 # endif
 428                       if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
 429                         tmp_length =
 430                           (unsigned int) (sizeof (unsigned long) * CHAR_BIT
 431                                           * 0.30103 /* binary -> decimal */
 432                                           * 2 /* estimate for FLAG_GROUP */
 433                                          )
 434                           + 1 /* turn floor into ceil */
 435                           + 1; /* account for leading sign */
 436                       else
 437                         tmp_length =
 438                           (unsigned int) (sizeof (unsigned int) * CHAR_BIT
 439                                           * 0.30103 /* binary -> decimal */
 440                                           * 2 /* estimate for FLAG_GROUP */
 441                                          )
 442                           + 1 /* turn floor into ceil */
 443                           + 1; /* account for leading sign */
 444                       break;
 445
 446                     case 'o':
 447 # ifdef HAVE_LONG_LONG
 448                       if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
 449                         tmp_length =
 450                           (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
 451                                           * 0.333334 /* binary -> octal */
 452                                          )
 453                           + 1 /* turn floor into ceil */
 454                           + 1; /* account for leading sign */
 455                       else
 456 # endif
 457                       if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
 458                         tmp_length =
 459                           (unsigned int) (sizeof (unsigned long) * CHAR_BIT
 460                                           * 0.333334 /* binary -> octal */
 461                                          )
 462                           + 1 /* turn floor into ceil */
 463                           + 1; /* account for leading sign */
 464                       else
 465                         tmp_length =
 466                           (unsigned int) (sizeof (unsigned int) * CHAR_BIT
 467                                           * 0.333334 /* binary -> octal */
 468                                          )
 469                           + 1 /* turn floor into ceil */
 470                           + 1; /* account for leading sign */
 471                       break;
 472
 473                     case 'x': case 'X':
 474 # ifdef HAVE_LONG_LONG
 475                       if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
 476                         tmp_length =
 477                           (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
 478                                           * 0.25 /* binary -> hexadecimal */
 479                                          )
 480                           + 1 /* turn floor into ceil */
 481                           + 2; /* account for leading sign or alternate form */
 482                       else
 483 # endif
 484                       if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
 485                         tmp_length =
 486                           (unsigned int) (sizeof (unsigned long) * CHAR_BIT
 487                                           * 0.25 /* binary -> hexadecimal */
 488                                          )
 489                           + 1 /* turn floor into ceil */
 490                           + 2; /* account for leading sign or alternate form */
 491                       else
 492                         tmp_length =
 493                           (unsigned int) (sizeof (unsigned int) * CHAR_BIT
 494                                           * 0.25 /* binary -> hexadecimal */
 495                                          )
 496                           + 1 /* turn floor into ceil */
 497                           + 2; /* account for leading sign or alternate form */
 498                       break;
 499
 500                     case 'f': case 'F':
 501 # ifdef HAVE_LONG_DOUBLE
 502                       if (type == TYPE_LONGDOUBLE)
 503                         tmp_length =
 504                           (unsigned int) (LDBL_MAX_EXP
 505                                           * 0.30103 /* binary -> decimal */
 506                                           * 2 /* estimate for FLAG_GROUP */
 507                                          )
 508                           + 1 /* turn floor into ceil */
 509                           + precision
 510                           + 10; /* sign, decimal point etc. */
 511                       else
 512 # endif
 513                         tmp_length =
 514                           (unsigned int) (DBL_MAX_EXP
 515                                           * 0.30103 /* binary -> decimal */
 516                                           * 2 /* estimate for FLAG_GROUP */
 517                                          )
 518                           + 1 /* turn floor into ceil */
 519                           + precision
 520                           + 10; /* sign, decimal point etc. */
 521                       break;
 522
 523                     case 'e': case 'E': case 'g': case 'G':
 524                     case 'a': case 'A':
 525                       tmp_length =
 526                         precision
 527                         + 12; /* sign, decimal point, exponent etc. */
 528                       break;
 529
 530                     case 'c':
 531 # ifdef HAVE_WINT_T
 532                       if (type == TYPE_WIDE_CHAR)
 533                         tmp_length = MB_CUR_MAX;
 534                       else
 535 # endif
 536                         tmp_length = 1;
 537                       break;
 538
 539                     case 's':
 540 # ifdef HAVE_WCHAR_T
 541                       if (type == TYPE_WIDE_STRING)
 542                         tmp_length =
 543                           wcslen (a.arg[dp->arg_index].a.a_wide_string)
 544                           * MB_CUR_MAX;
 545                       else
 546 # endif
 547                         tmp_length = strlen (a.arg[dp->arg_index].a.a_string);
 548                       break;
 549
 550                     case 'p':
 551                       tmp_length =
 552                         (unsigned int) (sizeof (void *) * CHAR_BIT
 553                                         * 0.25 /* binary -> hexadecimal */
 554                                        )
 555                           + 1 /* turn floor into ceil */
 556                           + 2; /* account for leading 0x */
 557                       break;
 558
 559                     default:
 560                       abort ();
 561                     }
 562
 563                   if (tmp_length < width)
 564                     tmp_length = width;
 565
 566                   tmp_length++; /* account for trailing NUL */
 567                 }
 568
 569                 if (tmp_length <= sizeof (tmpbuf))
 570                   tmp = tmpbuf;
 571                 else
 572                   {
 573                     tmp = (char *) malloc (tmp_length);
 574                     if (tmp == NULL)
 575                       {
 576                         /* Out of memory.  */
 577                         if (!(result == resultbuf || result == NULL))
 578                           free (result);
 579                         freea (buf);
 580                         CLEANUP ();
 581                         errno = ENOMEM;
 582                         return NULL;
 583                       }
 584                   }
 585 #endif
 586
 587                 /* Construct the format string for calling snprintf or
 588                    sprintf.  */
 589                 p = buf;
 590                 *p++ = '%';
 591                 if (dp->flags & FLAG_GROUP)
 592                   *p++ = '\'';
 593                 if (dp->flags & FLAG_LEFT)
 594                   *p++ = '-';
 595                 if (dp->flags & FLAG_SHOWSIGN)
 596                   *p++ = '+';
 597                 if (dp->flags & FLAG_SPACE)
 598                   *p++ = ' ';
 599                 if (dp->flags & FLAG_ALT)
 600                   *p++ = '#';
 601                 if (dp->flags & FLAG_ZERO)
 602                   *p++ = '0';
 603                 if (dp->width_start != dp->width_end)
 604                   {
 605                     size_t n = dp->width_end - dp->width_start;
 606                     memcpy (p, dp->width_start, n);
 607                     p += n;
 608                   }
 609                 if (dp->precision_start != dp->precision_end)
 610                   {
 611                     size_t n = dp->precision_end - dp->precision_start;
 612                     memcpy (p, dp->precision_start, n);
 613                     p += n;
 614                   }
 615
 616                 switch (type)
 617                   {
 618 #ifdef HAVE_LONG_LONG
 619                   case TYPE_LONGLONGINT:
 620                   case TYPE_ULONGLONGINT:
 621                     *p++ = 'l';
 622                     /*FALLTHROUGH*/
 623 #endif
 624                   case TYPE_LONGINT:
 625                   case TYPE_ULONGINT:
 626 #ifdef HAVE_WINT_T
 627                   case TYPE_WIDE_CHAR:
 628 #endif
 629 #ifdef HAVE_WCHAR_T
 630                   case TYPE_WIDE_STRING:
 631 #endif
 632                     *p++ = 'l';
 633                     break;
 634 #ifdef HAVE_LONG_DOUBLE
 635                   case TYPE_LONGDOUBLE:
 636                     *p++ = 'L';
 637                     break;
 638 #endif
 639                   default:
 640                     break;
 641                   }
 642                 *p = dp->conversion;
 643 #if HAVE_SNPRINTF
 644                 p[1] = '%';
 645                 p[2] = 'n';
 646                 p[3] = '\0';
 647 #else
 648                 p[1] = '\0';
 649 #endif
 650
 651                 /* Construct the arguments for calling snprintf or sprintf.  */
 652                 prefix_count = 0;
 653                 if (dp->width_arg_index >= 0)
 654                   {
 655                     if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
 656                       abort ();
 657                     prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
 658                   }
 659                 if (dp->precision_arg_index >= 0)
 660                   {
 661                     if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
 662                       abort ();
 663                     prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
 664                   }
 665
 666 #if HAVE_SNPRINTF
 667                 /* Prepare checking whether snprintf returns the count
 668                    via %n.  */
 669                 ENSURE_ALLOCATION (length + 1);
 670                 result[length] = '\0';
 671 #endif
 672
 673                 for (;;)
 674                   {
 675                     size_t maxlen;
 676                     int count;
 677                     int retcount;
 678
 679                     maxlen = allocated - length;
 680                     count = -1;
 681                     retcount = 0;
 682
 683 #if HAVE_SNPRINTF
 684 #define SNPRINTF_BUF(arg) \
 685                     switch (prefix_count)                                   \
 686                       {                                                     \
 687                       case 0:                                               \
 688                         retcount = snprintf (result + length, maxlen, buf,  \
 689                                              arg, &count);                  \
 690                         break;                                              \
 691                       case 1:                                               \
 692                         retcount = snprintf (result + length, maxlen, buf,  \
 693                                              prefixes[0], arg, &count);     \
 694                         break;                                              \
 695                       case 2:                                               \
 696                         retcount = snprintf (result + length, maxlen, buf,  \
 697                                              prefixes[0], prefixes[1], arg, \
 698                                              &count);                       \
 699                         break;                                              \
 700                       default:                                              \
 701                         abort ();                                           \
 702                       }
 703 #else
 704 #define SNPRINTF_BUF(arg) \
 705                     switch (prefix_count)                                   \
 706                       {                                                     \
 707                       case 0:                                               \
 708                         count = sprintf (tmp, buf, arg);                    \
 709                         break;                                              \
 710                       case 1:                                               \
 711                         count = sprintf (tmp, buf, prefixes[0], arg);       \
 712                         break;                                              \
 713                       case 2:                                               \
 714                         count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
 715                                          arg);                              \
 716                         break;                                              \
 717                       default:                                              \
 718                         abort ();                                           \
 719                       }
 720 #endif
 721
 722                     switch (type)
 723                       {
 724                       case TYPE_SCHAR:
 725                         {
 726                           int arg = a.arg[dp->arg_index].a.a_schar;
 727                           SNPRINTF_BUF (arg);
 728                         }
 729                         break;
 730                       case TYPE_UCHAR:
 731                         {
 732                           unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
 733                           SNPRINTF_BUF (arg);
 734                         }
 735                         break;
 736                       case TYPE_SHORT:
 737                         {
 738                           int arg = a.arg[dp->arg_index].a.a_short;
 739                           SNPRINTF_BUF (arg);
 740                         }
 741                         break;
 742                       case TYPE_USHORT:
 743                         {
 744                           unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
 745                           SNPRINTF_BUF (arg);
 746                         }
 747                         break;
 748                       case TYPE_INT:
 749                         {
 750                           int arg = a.arg[dp->arg_index].a.a_int;
 751                           SNPRINTF_BUF (arg);
 752                         }
 753                         break;
 754                       case TYPE_UINT:
 755                         {
 756                           unsigned int arg = a.arg[dp->arg_index].a.a_uint;
 757                           SNPRINTF_BUF (arg);
 758                         }
 759                         break;
 760                       case TYPE_LONGINT:
 761                         {
 762                           long int arg = a.arg[dp->arg_index].a.a_longint;
 763                           SNPRINTF_BUF (arg);
 764                         }
 765                         break;
 766                       case TYPE_ULONGINT:
 767                         {
 768                           unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
 769                           SNPRINTF_BUF (arg);
 770                         }
 771                         break;
 772 #ifdef HAVE_LONG_LONG
 773 #ifndef HAVE_LONG_LONG_FORMAT
 774                       case TYPE_LONGLONGINT:
 775                       case TYPE_ULONGLONGINT:
 776                         {
 777                           unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
 778                           int width;
 779                           int precision;
 780
 781                           width = 0;
 782                           if (dp->width_start != dp->width_end)
 783                             {
 784                               if (dp->width_arg_index >= 0)
 785                                 {
 786                                   int arg;
 787
 788                                   if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
 789                                     abort ();
 790                                   arg = a.arg[dp->width_arg_index].a.a_int;
 791                                   width = (arg < 0 ? -arg : arg);
 792                                 }
 793                               else
 794                                 {
 795                                   const char *digitp = dp->width_start;
 796
 797                                   do
 798                                     width = width * 10 + (*digitp++ - '0');
 799                                   while (digitp != dp->width_end);
 800                                 }
 801                             }
 802
 803                           precision = -1;
 804                           if (dp->precision_start != dp->precision_end)
 805                             {
 806                               if (dp->precision_arg_index >= 0)
 807                                 {
 808                                   int arg;
 809
 810                                   if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
 811                                     abort ();
 812                                   arg = a.arg[dp->precision_arg_index].a.a_int;
 813                                   precision = (arg < 0 ? 0 : arg);
 814                                 }
 815                               else
 816                                 {
 817                                   const char *digitp = dp->precision_start + 1;
 818
 819                                   precision = 0;
 820                                   do
 821                                     precision = precision * 10 + (*digitp++ - '0');
 822                                   while (digitp != dp->precision_end);
 823                                 }
 824                             }
 825
 826                           count = print_long_long (result + length, maxlen,
 827                                                    width, precision,
 828                                                    dp->flags,
 829                                                    dp->conversion,
 830                                                    arg);
 831                         }
 832                         break;
 833 #else
 834                       case TYPE_LONGLONGINT:
 835                         {
 836                           long long int arg = a.arg[dp->arg_index].a.a_longlongint;
 837                           SNPRINTF_BUF (arg);
 838                         }
 839                         break;
 840                       case TYPE_ULONGLONGINT:
 841                         {
 842                           unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
 843                           SNPRINTF_BUF (arg);
 844                         }
 845                         break;
 846 #endif
 847 #endif
 848                       case TYPE_DOUBLE:
 849                         {
 850                           double arg = a.arg[dp->arg_index].a.a_double;
 851                           SNPRINTF_BUF (arg);
 852                         }
 853                         break;
 854 #ifdef HAVE_LONG_DOUBLE
 855                       case TYPE_LONGDOUBLE:
 856                         {
 857                           long double arg = a.arg[dp->arg_index].a.a_longdouble;
 858                           SNPRINTF_BUF (arg);
 859                         }
 860                         break;
 861 #endif
 862                       case TYPE_CHAR:
 863                         {
 864                           int arg = a.arg[dp->arg_index].a.a_char;
 865                           SNPRINTF_BUF (arg);
 866                         }
 867                         break;
 868 #ifdef HAVE_WINT_T
 869                       case TYPE_WIDE_CHAR:
 870                         {
 871                           wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
 872                           SNPRINTF_BUF (arg);
 873                         }
 874                         break;
 875 #endif
 876                       case TYPE_STRING:
 877                         {
 878                           const char *arg = a.arg[dp->arg_index].a.a_string;
 879                           SNPRINTF_BUF (arg);
 880                         }
 881                         break;
 882 #ifdef HAVE_WCHAR_T
 883                       case TYPE_WIDE_STRING:
 884                         {
 885                           const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
 886                           SNPRINTF_BUF (arg);
 887                         }
 888                         break;
 889 #endif
 890                       case TYPE_POINTER:
 891                         {
 892                           void *arg = a.arg[dp->arg_index].a.a_pointer;
 893                           SNPRINTF_BUF (arg);
 894                         }
 895                         break;
 896                       default:
 897                         abort ();
 898                       }
 899
 900 #if HAVE_SNPRINTF
 901                     /* Portability: Not all implementations of snprintf()
 902                        are ISO C 99 compliant.  Determine the number of
 903                        bytes that snprintf() has produced or would have
 904                        produced.  */
 905                     if (count >= 0)
 906                       {
 907                         /* Verify that snprintf() has NUL-terminated its
 908                            result.  */
 909                         if (count < maxlen && result[length + count] != '\0')
 910                           abort ();
 911                         /* Portability hack.  */
 912                         if (retcount > count)
 913                           count = retcount;
 914                       }
 915                     else
 916                       {
 917                         /* snprintf() doesn't understand the '%n'
 918                            directive.  */
 919                         if (p[1] != '\0')
 920                           {
 921                             /* Don't use the '%n' directive; instead, look
 922                                at the snprintf() return value.  */
 923                             p[1] = '\0';
 924                             continue;
 925                           }
 926                         count = retcount;
 927                       }
 928 #endif
 929
 930                     /* Attempt to handle failure.  */
 931                     if (count < 0)
 932                       {
 933                         if (!(result == resultbuf || result == NULL))
 934                           free (result);
 935                         freea (buf);
 936                         CLEANUP ();
 937                         errno = EINVAL;
 938                         return NULL;
 939                       }
 940
 941 #if !HAVE_SNPRINTF
 942                     if (count >= tmp_length)
 943                       /* tmp_length was incorrectly calculated - fix the
 944                          code above!  */
 945                       abort ();
 946 #endif
 947
 948                     /* Make room for the result.  */
 949                     if (count >= maxlen)
 950                       {
 951                         /* Need at least count bytes.  But allocate
 952                            proportionally, to avoid looping eternally if
 953                            snprintf() reports a too small count.  */
 954                         size_t n = length + count;
 955
 956                         if (n < 2 * allocated)
 957                           n = 2 * allocated;
 958
 959                         ENSURE_ALLOCATION (n);
 960 #if HAVE_SNPRINTF
 961                         continue;
 962 #endif
 963                       }
 964
 965 #if HAVE_SNPRINTF
 966                     /* The snprintf() result did fit.  */
 967 #else
 968                     /* Append the sprintf() result.  */
 969                     memcpy (result + length, tmp, count);
 970                     if (tmp != tmpbuf)
 971                       free (tmp);
 972 #endif
 973
 974                     length += count;
 975                     break;
 976                   }
 977               }
 978           }
 979       }
 980
 981     /* Add the final NUL.  */
 982     ENSURE_ALLOCATION (length + 1);
 983     result[length] = '\0';
 984
 985     if (result != resultbuf && length + 1 < allocated)
 986       {
 987         /* Shrink the allocated memory if possible.  */
 988         char *memory;
 989
 990         memory = (char *) realloc (result, length + 1);
 991         if (memory != NULL)
 992           result = memory;
 993       }
 994
 995     freea (buf);
 996     CLEANUP ();
 997     *lengthp = length;
 998     return result;
 999   }
1000 }