stdio-common/vfprintf.c

   1 /* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library 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 the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 Boston, MA 02111-1307, USA.  */
  18
  19 #include <ctype.h>
  20 #include <limits.h>
  21 #include <printf.h>
  22 #include <stdarg.h>
  23 #include <stdlib.h>
  24 #include <wchar.h>
  25 #include "_itoa.h"
  26 #include "../locale/localeinfo.h"
  27
  28 /* This code is shared between the standard stdio implementation found
  29    in GNU C library and the libio implementation originally found in
  30    GNU libg++.
  31
  32    Beside this it is also shared between the normal and wide character
  33    implementation as defined in ISO/IEC 9899:1990/Amendment 1:1995.  */
  34
  35 #ifndef COMPILE_WPRINTF
  36 # define CHAR_T         char
  37 # define UCHAR_T        unsigned char
  38 # define INT_T          int
  39 # define L_(Str)        Str
  40 # define ISDIGIT(Ch)    isdigit (Ch)
  41
  42 # ifdef USE_IN_LIBIO
  43 #  define PUT(F, S, N)  _IO_sputn (F, S, N)
  44 #  define PAD(Padchar)                                                        \
  45   if (width > 0)                                                              \
  46     done += _IO_padn (s, Padchar, width)
  47 # else
  48 #  define PUTC(C, F)    putc (C, F)
  49 ssize_t __printf_pad __P ((FILE *, char pad, size_t n));
  50 # define PAD(Padchar)                                                         \
  51   if (width > 0)                                                              \
  52     { if (__printf_pad (s, Padchar, width) == -1)                             \
  53         return -1; else done += width; }
  54 # endif
  55 #else
  56 # define vfprintf       vfwprintf
  57 # define CHAR_T         wchar_t
  58 # define UCHAR_T        uwchar_t
  59 # define INT_T          wint_t
  60 # define L_(Str)        L##Str
  61 # define ISDIGIT(Ch)    iswdigit (Ch)
  62
  63 # ifdef USE_IN_LIBIO
  64 # define PUT(F, S, N)   _IO_sputn (F, S, N)
  65 # define PAD(Padchar)                                                         \
  66   if (width > 0)                                                              \
  67     done += _IO_wpadn (s, Padchar, width)
  68 # else
  69 #  define PUTC(C, F)    wputc (C, F)
  70 ssize_t __wprintf_pad __P ((FILE *, wchar_t pad, size_t n));
  71 # define PAD(Padchar)                                                         \
  72   if (width > 0)                                                              \
  73     { if (__wprintf_pad (s, Padchar, width) == -1)                            \
  74         return -1; else done += width; }
  75 # endif
  76 #endif
  77
  78 /* Include the shared code for parsing the format string.  */
  79 #include "printf-parse.h"
  80
  81
  82 #ifdef USE_IN_LIBIO
  83 /* This code is for use in libio.  */
  84 # include <libioP.h>
  85 # define PUTC(C, F)     _IO_putc (C, F)
  86 # define vfprintf       _IO_vfprintf
  87 # define size_t         _IO_size_t
  88 # define FILE           _IO_FILE
  89 # define va_list        _IO_va_list
  90 # undef BUFSIZ
  91 # define BUFSIZ         _IO_BUFSIZ
  92 # define ARGCHECK(S, Format)                                                  \
  93   do                                                                          \
  94     {                                                                         \
  95       /* Check file argument for consistence.  */                             \
  96       CHECK_FILE (S, -1);                                                     \
  97       if (S->_flags & _IO_NO_WRITES || Format == NULL)                        \
  98         {                                                                     \
  99           MAYBE_SET_EINVAL;                                                   \
 100           return -1;                                                          \
 101         }                                                                     \
 102     } while (0)
 103 # define UNBUFFERED_P(S) ((S)->_IO_file_flags & _IO_UNBUFFERED)
 104 #else /* ! USE_IN_LIBIO */
 105 /* This code is for use in the GNU C library.  */
 106 # include <stdio.h>
 107 # define PUT(F, S, N)   fwrite (S, 1, N, F)
 108 # define ARGCHECK(S, Format)                                                  \
 109   do                                                                          \
 110     {                                                                         \
 111       /* Check file argument for consistence.  */                             \
 112       if (!__validfp(S) || !S->__mode.__write || Format == NULL)              \
 113         {                                                                     \
 114           errno = EINVAL;                                                     \
 115           return -1;                                                          \
 116         }                                                                     \
 117       if (!S->__seen)                                                         \
 118         {                                                                     \
 119           if (__flshfp (S, EOF) == EOF)                                       \
 120             return -1;                                                        \
 121         }                                                                     \
 122     }                                                                         \
 123    while (0)
 124 # define UNBUFFERED_P(s) ((s)->__buffer == NULL)
 125 #endif /* USE_IN_LIBIO */
 126
 127
 128 #define outchar(Ch)                                                           \
 129   do                                                                          \
 130     {                                                                         \
 131       register const int outc = (Ch);                                         \
 132       if (PUTC (outc, s) == EOF)                                              \
 133         return -1;                                                            \
 134       else                                                                    \
 135         ++done;                                                               \
 136     }                                                                         \
 137   while (0)
 138
 139 #define outstring(String, Len)                                                \
 140   do                                                                          \
 141     {                                                                         \
 142       if (PUT (s, String, Len) != Len)                                        \
 143         return -1;                                                            \
 144       done += Len;                                                            \
 145     }                                                                         \
 146   while (0)
 147
 148 /* For handling long_double and longlong we use the same flag.  */
 149 #ifndef is_longlong
 150 # define is_longlong is_long_double
 151 #endif
 152
 153
 154 /* Global variables.  */
 155 static const char null[] = "(null)";
 156
 157
 158 /* Helper function to provide temporary buffering for unbuffered streams.  */
 159 static int buffered_vfprintf __P ((FILE *stream, const CHAR_T *fmt, va_list));
 160
 161 /* Handle unknown format specifier.  */
 162 static int printf_unknown __P ((FILE *, const struct printf_info *,
 163                                 const void *const *));
 164
 165 /* Group digits of number string.  */
 166 static char *group_number __P ((CHAR_T *, CHAR_T *, const CHAR_T *, wchar_t));
 167
 168
 169 /* The function itself.  */
 170 int
 171 vfprintf (FILE *s, const CHAR_T *format, va_list ap)
 172 {
 173   /* The character used as thousands separator.  */
 174   wchar_t thousands_sep;
 175
 176   /* The string describing the size of groups of digits.  */
 177   const char *grouping;
 178
 179   /* Place to accumulate the result.  */
 180   int done;
 181
 182   /* Current character in format string.  */
 183   const UCHAR_T *f;
 184
 185   /* End of leading constant string.  */
 186   const UCHAR_T *lead_str_end;
 187
 188   /* Points to next format specifier.  */
 189   const UCHAR_T *end_of_spec;
 190
 191   /* Buffer intermediate results.  */
 192   char work_buffer[1000];
 193 #define workend (&work_buffer[sizeof (work_buffer) - 1])
 194
 195   /* State for restartable multibyte character handling functions.  */
 196   mbstate_t mbstate;
 197
 198   /* We have to save the original argument pointer.  */
 199   va_list ap_save;
 200
 201   /* Count number of specifiers we already processed.  */
 202   int nspecs_done;
 203
 204
 205   /* This table maps a character into a number representing a
 206      class.  In each step there is a destination label for each
 207      class.  */
 208   static const int jump_table[] =
 209   {
 210     /* ' ' */  1,            0,            0, /* '#' */  4,
 211                0, /* '%' */ 14,            0, /* '\''*/  6,
 212                0,            0, /* '*' */  7, /* '+' */  2,
 213                0, /* '-' */  3, /* '.' */  9,            0,
 214     /* '0' */  5, /* '1' */  8, /* '2' */  8, /* '3' */  8,
 215     /* '4' */  8, /* '5' */  8, /* '6' */  8, /* '7' */  8,
 216     /* '8' */  8, /* '9' */  8,            0,            0,
 217                0,            0,            0,            0,
 218                0,            0,            0,            0,
 219                0, /* 'E' */ 19,            0, /* 'G' */ 19,
 220                0,            0,            0,            0,
 221     /* 'L' */ 12,            0,            0,            0,
 222                0,            0,            0,            0,
 223                0,            0,            0,            0,
 224     /* 'X' */ 18,            0, /* 'Z' */ 13,            0,
 225                0,            0,            0,            0,
 226                0,            0,            0, /* 'c' */ 20,
 227     /* 'd' */ 15, /* 'e' */ 19, /* 'f' */ 19, /* 'g' */ 19,
 228     /* 'h' */ 10, /* 'i' */ 15,            0,            0,
 229     /* 'l' */ 11, /* 'm' */ 24, /* 'n' */ 23, /* 'o' */ 17,
 230     /* 'p' */ 22, /* 'q' */ 12,            0, /* 's' */ 21,
 231                0, /* 'u' */ 16,            0,            0,
 232     /* 'x' */ 18
 233   };
 234
 235 #define NOT_IN_JUMP_RANGE(Ch) ((Ch) < ' ' || (Ch) > 'x')
 236 #define CHAR_CLASS(Ch) (jump_table[(int) (Ch) - ' '])
 237 #define JUMP(ChExpr, table)                                                   \
 238       do                                                                      \
 239         {                                                                     \
 240           const void *ptr;                                                    \
 241           spec = (ChExpr);                                                    \
 242           ptr = NOT_IN_JUMP_RANGE (spec) ? REF (form_unknown)                 \
 243             : table[CHAR_CLASS (spec)];                                       \
 244           goto *ptr;                                                          \
 245         }                                                                     \
 246       while (0)
 247
 248 #define STEP0_3_TABLE                                                         \
 249     /* Step 0: at the beginning.  */                                          \
 250     static const void *step0_jumps[25] =                                      \
 251     {                                                                         \
 252       REF (form_unknown),                                                     \
 253       REF (flag_space),         /* for ' ' */                                 \
 254       REF (flag_plus),          /* for '+' */                                 \
 255       REF (flag_minus),         /* for '-' */                                 \
 256       REF (flag_hash),          /* for '<hash>' */                            \
 257       REF (flag_zero),          /* for '0' */                                 \
 258       REF (flag_quote),         /* for '\'' */                                \
 259       REF (width_asterics),     /* for '*' */                                 \
 260       REF (width),              /* for '1'...'9' */                           \
 261       REF (precision),          /* for '.' */                                 \
 262       REF (mod_half),           /* for 'h' */                                 \
 263       REF (mod_long),           /* for 'l' */                                 \
 264       REF (mod_longlong),       /* for 'L', 'q' */                            \
 265       REF (mod_size_t),         /* for 'Z' */                                 \
 266       REF (form_percent),       /* for '%' */                                 \
 267       REF (form_integer),       /* for 'd', 'i' */                            \
 268       REF (form_unsigned),      /* for 'u' */                                 \
 269       REF (form_octal),         /* for 'o' */                                 \
 270       REF (form_hexa),          /* for 'X', 'x' */                            \
 271       REF (form_float),         /* for 'E', 'e', 'f', 'G', 'g' */             \
 272       REF (form_character),     /* for 'c' */                                 \
 273       REF (form_string),        /* for 's' */                                 \
 274       REF (form_pointer),       /* for 'p' */                                 \
 275       REF (form_number),        /* for 'n' */                                 \
 276       REF (form_strerror)       /* for 'm' */                                 \
 277     };                                                                        \
 278     /* Step 1: after processing width.  */                                    \
 279     static const void *step1_jumps[25] =                                      \
 280     {                                                                         \
 281       REF (form_unknown),                                                     \
 282       REF (form_unknown),       /* for ' ' */                                 \
 283       REF (form_unknown),       /* for '+' */                                 \
 284       REF (form_unknown),       /* for '-' */                                 \
 285       REF (form_unknown),       /* for '<hash>' */                            \
 286       REF (form_unknown),       /* for '0' */                                 \
 287       REF (form_unknown),       /* for '\'' */                                \
 288       REF (form_unknown),       /* for '*' */                                 \
 289       REF (form_unknown),       /* for '1'...'9' */                           \
 290       REF (precision),          /* for '.' */                                 \
 291       REF (mod_half),           /* for 'h' */                                 \
 292       REF (mod_long),           /* for 'l' */                                 \
 293       REF (mod_longlong),       /* for 'L', 'q' */                            \
 294       REF (mod_size_t),         /* for 'Z' */                                 \
 295       REF (form_percent),       /* for '%' */                                 \
 296       REF (form_integer),       /* for 'd', 'i' */                            \
 297       REF (form_unsigned),      /* for 'u' */                                 \
 298       REF (form_octal),         /* for 'o' */                                 \
 299       REF (form_hexa),          /* for 'X', 'x' */                            \
 300       REF (form_float),         /* for 'E', 'e', 'f', 'G', 'g' */             \
 301       REF (form_character),     /* for 'c' */                                 \
 302       REF (form_string),        /* for 's' */                                 \
 303       REF (form_pointer),       /* for 'p' */                                 \
 304       REF (form_number),        /* for 'n' */                                 \
 305       REF (form_strerror)       /* for 'm' */                                 \
 306     };                                                                        \
 307     /* Step 2: after processing precision.  */                                \
 308     static const void *step2_jumps[25] =                                      \
 309     {                                                                         \
 310       REF (form_unknown),                                                     \
 311       REF (form_unknown),       /* for ' ' */                                 \
 312       REF (form_unknown),       /* for '+' */                                 \
 313       REF (form_unknown),       /* for '-' */                                 \
 314       REF (form_unknown),       /* for '<hash>' */                            \
 315       REF (form_unknown),       /* for '0' */                                 \
 316       REF (form_unknown),       /* for '\'' */                                \
 317       REF (form_unknown),       /* for '*' */                                 \
 318       REF (form_unknown),       /* for '1'...'9' */                           \
 319       REF (form_unknown),       /* for '.' */                                 \
 320       REF (mod_half),           /* for 'h' */                                 \
 321       REF (mod_long),           /* for 'l' */                                 \
 322       REF (mod_longlong),       /* for 'L', 'q' */                            \
 323       REF (mod_size_t),         /* for 'Z' */                                 \
 324       REF (form_percent),       /* for '%' */                                 \
 325       REF (form_integer),       /* for 'd', 'i' */                            \
 326       REF (form_unsigned),      /* for 'u' */                                 \
 327       REF (form_octal),         /* for 'o' */                                 \
 328       REF (form_hexa),          /* for 'X', 'x' */                            \
 329       REF (form_float),         /* for 'E', 'e', 'f', 'G', 'g' */             \
 330       REF (form_character),     /* for 'c' */                                 \
 331       REF (form_string),        /* for 's' */                                 \
 332       REF (form_pointer),       /* for 'p' */                                 \
 333       REF (form_number),        /* for 'n' */                                 \
 334       REF (form_strerror)       /* for 'm' */                                 \
 335     };                                                                        \
 336     /* Step 3: after processing first 'l' modifier.  */                       \
 337     static const void *step3_jumps[25] =                                      \
 338     {                                                                         \
 339       REF (form_unknown),                                                     \
 340       REF (form_unknown),       /* for ' ' */                                 \
 341       REF (form_unknown),       /* for '+' */                                 \
 342       REF (form_unknown),       /* for '-' */                                 \
 343       REF (form_unknown),       /* for '<hash>' */                            \
 344       REF (form_unknown),       /* for '0' */                                 \
 345       REF (form_unknown),       /* for '\'' */                                \
 346       REF (form_unknown),       /* for '*' */                                 \
 347       REF (form_unknown),       /* for '1'...'9' */                           \
 348       REF (form_unknown),       /* for '.' */                                 \
 349       REF (form_unknown),       /* for 'h' */                                 \
 350       REF (mod_longlong),       /* for 'l' */                                 \
 351       REF (form_unknown),       /* for 'L', 'q' */                            \
 352       REF (form_unknown),       /* for 'Z' */                                 \
 353       REF (form_percent),       /* for '%' */                                 \
 354       REF (form_integer),       /* for 'd', 'i' */                            \
 355       REF (form_unsigned),      /* for 'u' */                                 \
 356       REF (form_octal),         /* for 'o' */                                 \
 357       REF (form_hexa),          /* for 'X', 'x' */                            \
 358       REF (form_float),         /* for 'E', 'e', 'f', 'G', 'g' */             \
 359       REF (form_character),     /* for 'c' */                                 \
 360       REF (form_string),        /* for 's' */                                 \
 361       REF (form_pointer),       /* for 'p' */                                 \
 362       REF (form_number),        /* for 'n' */                                 \
 363       REF (form_strerror)       /* for 'm' */                                 \
 364     }
 365
 366 #define STEP4_TABLE                                                           \
 367     /* Step 4: processing format specifier.  */                               \
 368     static const void *step4_jumps[25] =                                      \
 369     {                                                                         \
 370       REF (form_unknown),                                                     \
 371       REF (form_unknown),       /* for ' ' */                                 \
 372       REF (form_unknown),       /* for '+' */                                 \
 373       REF (form_unknown),       /* for '-' */                                 \
 374       REF (form_unknown),       /* for '<hash>' */                            \
 375       REF (form_unknown),       /* for '0' */                                 \
 376       REF (form_unknown),       /* for '\'' */                                \
 377       REF (form_unknown),       /* for '*' */                                 \
 378       REF (form_unknown),       /* for '1'...'9' */                           \
 379       REF (form_unknown),       /* for '.' */                                 \
 380       REF (form_unknown),       /* for 'h' */                                 \
 381       REF (form_unknown),       /* for 'l' */                                 \
 382       REF (form_unknown),       /* for 'L', 'q' */                            \
 383       REF (form_unknown),       /* for 'Z' */                                 \
 384       REF (form_percent),       /* for '%' */                                 \
 385       REF (form_integer),       /* for 'd', 'i' */                            \
 386       REF (form_unsigned),      /* for 'u' */                                 \
 387       REF (form_octal),         /* for 'o' */                                 \
 388       REF (form_hexa),          /* for 'X', 'x' */                            \
 389       REF (form_float),         /* for 'E', 'e', 'f', 'G', 'g' */             \
 390       REF (form_character),     /* for 'c' */                                 \
 391       REF (form_string),        /* for 's' */                                 \
 392       REF (form_pointer),       /* for 'p' */                                 \
 393       REF (form_number),        /* for 'n' */                                 \
 394       REF (form_strerror)       /* for 'm' */                                 \
 395     }
 396
 397
 398 #define process_arg(fspec)                                                    \
 399       /* Start real work.  We know about all flag and modifiers and           \
 400          now process the wanted format specifier.  */                         \
 401     LABEL (form_percent):                                                     \
 402       /* Write a literal "%".  */                                             \
 403       outchar ('%');                                                          \
 404       break;                                                                  \
 405                                                                               \
 406     LABEL (form_integer):                                                     \
 407       /* Signed decimal integer.  */                                          \
 408       base = 10;                                                              \
 409                                                                               \
 410       if (is_longlong)                                                        \
 411         {                                                                     \
 412           long long int signed_number;                                        \
 413                                                                               \
 414           signed_number = va_arg (ap, long long int);                         \
 415                                                                               \
 416           is_negative = signed_number < 0;                                    \
 417           number.longlong = is_negative ? (- signed_number) : signed_number;  \
 418                                                                               \
 419           goto LABEL (longlong_number);                                       \
 420         }                                                                     \
 421       else                                                                    \
 422         {                                                                     \
 423           long int signed_number;                                             \
 424                                                                               \
 425           if (is_long)                                                        \
 426             signed_number = va_arg (ap, long int);                            \
 427           else  /* `short int' will be promoted to `int'.  */                 \
 428             signed_number = va_arg (ap, int);                                 \
 429                                                                               \
 430           is_negative = signed_number < 0;                                    \
 431           number.word = is_negative ? (- signed_number) : signed_number;      \
 432                                                                               \
 433           goto LABEL (number);                                                \
 434         }                                                                     \
 435       /* NOTREACHED */                                                        \
 436                                                                               \
 437     LABEL (form_unsigned):                                                    \
 438       /* Unsigned decimal integer.  */                                        \
 439       base = 10;                                                              \
 440       goto LABEL (unsigned_number);                                           \
 441       /* NOTREACHED */                                                        \
 442                                                                               \
 443     LABEL (form_octal):                                                       \
 444       /* Unsigned octal integer.  */                                          \
 445       base = 8;                                                               \
 446       goto LABEL (unsigned_number);                                           \
 447       /* NOTREACHED */                                                        \
 448                                                                               \
 449     LABEL (form_hexa):                                                        \
 450       /* Unsigned hexadecimal integer.  */                                    \
 451       base = 16;                                                              \
 452                                                                               \
 453     LABEL (unsigned_number):      /* Unsigned number of base BASE.  */        \
 454                                                                               \
 455       /* ANSI specifies the `+' and ` ' flags only for signed                 \
 456          conversions.  */                                                     \
 457       is_negative = 0;                                                        \
 458       showsign = 0;                                                           \
 459       space = 0;                                                              \
 460                                                                               \
 461       if (is_longlong)                                                        \
 462         {                                                                     \
 463           number.longlong = va_arg (ap, unsigned long long int);              \
 464                                                                               \
 465         LABEL (longlong_number):                                              \
 466           if (prec < 0)                                                       \
 467             /* Supply a default precision if none was given.  */              \
 468             prec = 1;                                                         \
 469           else                                                                \
 470             /* We have to take care for the '0' flag.  If a precision         \
 471                is given it must be ignored.  */                               \
 472             pad = ' ';                                                        \
 473                                                                               \
 474           /* If the precision is 0 and the number is 0 nothing has to         \
 475              be written for the number.  */                                   \
 476           if (prec == 0 && number.longlong == 0)                              \
 477             string = workend;                                                 \
 478           else                                                                \
 479             {                                                                 \
 480               /* Put the number in WORK.  */                                  \
 481               string = _itoa (number.longlong, workend + 1, base,             \
 482                               spec == 'X');                                   \
 483               string -= 1;                                                    \
 484               if (group && grouping)                                          \
 485                 string = group_number (string, workend, grouping,             \
 486                                        thousands_sep);                        \
 487             }                                                                 \
 488           /* Simply further test for num != 0.  */                            \
 489           number.word = number.longlong != 0;                                 \
 490         }                                                                     \
 491       else                                                                    \
 492         {                                                                     \
 493           if (is_long)                                                        \
 494             number.word = va_arg (ap, unsigned long int);                     \
 495           else                                                                \
 496             number.word = va_arg (ap, unsigned int); /* Promoted.  */         \
 497                                                                               \
 498         LABEL (number):                                                       \
 499           if (prec < 0)                                                       \
 500             /* Supply a default precision if none was given.  */              \
 501             prec = 1;                                                         \
 502           else                                                                \
 503             /* We have to take care for the '0' flag.  If a precision         \
 504                is given it must be ignored.  */                               \
 505             pad = ' ';                                                        \
 506                                                                               \
 507           /* If the precision is 0 and the number is 0 nothing has to         \
 508              be written for the number.  */                                   \
 509           if (prec == 0 && number.word == 0)                                  \
 510             string = workend;                                                 \
 511           else                                                                \
 512             {                                                                 \
 513               /* Put the number in WORK.  */                                  \
 514               string = _itoa_word (number.word, workend + 1, base,            \
 515                                    spec == 'X');                              \
 516               string -= 1;                                                    \
 517               if (group && grouping)                                          \
 518                 string = group_number (string, workend, grouping,             \
 519                                        thousands_sep);                        \
 520             }                                                                 \
 521         }                                                                     \
 522                                                                               \
 523       prec -= workend - string;                                               \
 524                                                                               \
 525       if (prec > 0)                                                           \
 526         /* Add zeros to the precision.  */                                    \
 527         while (prec-- > 0)                                                    \
 528           *string-- = '0';                                                    \
 529       else if (number.word != 0 && alt && base == 8)                          \
 530         /* Add octal marker.  */                                              \
 531         *string-- = '0';                                                      \
 532                                                                               \
 533       if (!left)                                                              \
 534         {                                                                     \
 535           width -= workend - string;                                          \
 536                                                                               \
 537           if (number.word != 0 && alt && base == 16)                          \
 538             /* Account for 0X hex marker.  */                                 \
 539             width -= 2;                                                       \
 540                                                                               \
 541           if (is_negative || showsign || space)                               \
 542             --width;                                                          \
 543                                                                               \
 544           if (pad == '0')                                                     \
 545             {                                                                 \
 546               while (width-- > 0)                                             \
 547                 *string-- = '0';                                              \
 548                                                                               \
 549               if (number.word != 0 && alt && base == 16)                      \
 550                 {                                                             \
 551                   *string-- = spec;                                           \
 552                   *string-- = '0';                                            \
 553                 }                                                             \
 554                                                                               \
 555               if (is_negative)                                                \
 556                 *string-- = '-';                                              \
 557               else if (showsign)                                              \
 558                 *string-- = '+';                                              \
 559               else if (space)                                                 \
 560                 *string-- = ' ';                                              \
 561             }                                                                 \
 562           else                                                                \
 563             {                                                                 \
 564               if (number.word != 0 && alt && base == 16)                      \
 565                 {                                                             \
 566                   *string-- = spec;                                           \
 567                   *string-- = '0';                                            \
 568                 }                                                             \
 569                                                                               \
 570               if (is_negative)                                                \
 571                 *string-- = '-';                                              \
 572               else if (showsign)                                              \
 573                 *string-- = '+';                                              \
 574               else if (space)                                                 \
 575                 *string-- = ' ';                                              \
 576                                                                               \
 577               while (width-- > 0)                                             \
 578                 *string-- = ' ';                                              \
 579             }                                                                 \
 580                                                                               \
 581           outstring (string + 1, workend - string);                           \
 582                                                                               \
 583           break;                                                              \
 584         }                                                                     \
 585       else                                                                    \
 586         {                                                                     \
 587           if (number.word != 0 && alt && base == 16)                          \
 588             {                                                                 \
 589               *string-- = spec;                                               \
 590               *string-- = '0';                                                \
 591             }                                                                 \
 592                                                                               \
 593           if (is_negative)                                                    \
 594             *string-- = '-';                                                  \
 595           else if (showsign)                                                  \
 596             *string-- = '+';                                                  \
 597           else if (space)                                                     \
 598             *string-- = ' ';                                                  \
 599                                                                               \
 600           width -= workend - string;                                          \
 601           outstring (string + 1, workend - string);                           \
 602                                                                               \
 603           PAD (' ');                                                          \
 604           break;                                                              \
 605         }                                                                     \
 606                                                                               \
 607     LABEL (form_float):                                                       \
 608       {                                                                       \
 609         /* Floating-point number.  This is handled by printf_fp.c.  */        \
 610         extern int __printf_fp __P ((FILE *, const struct printf_info *,      \
 611                                      const void **const));                    \
 612         const void *ptr;                                                      \
 613         int function_done;                                                    \
 614                                                                               \
 615         if (is_long_double)                                                   \
 616           the_arg.pa_long_double = va_arg (ap, long double);                  \
 617         else                                                                  \
 618           the_arg.pa_double = va_arg (ap, double);                            \
 619                                                                               \
 620         ptr = (const void *) &the_arg;                                        \
 621                                                                               \
 622         if (fspec == NULL)                                                    \
 623           {                                                                   \
 624             struct printf_info info = { prec: prec,                           \
 625                                         width: width,                         \
 626                                         spec: spec,                           \
 627                                         is_long_double: is_long_double,       \
 628                                         is_short: is_short,                   \
 629                                         is_long: is_long,                     \
 630                                         alt: alt,                             \
 631                                         space: space,                         \
 632                                         left: left,                           \
 633                                         showsign: showsign,                   \
 634                                         group: group,                         \
 635                                         pad: pad };                           \
 636                                                                               \
 637             function_done = __printf_fp (s, &info, &ptr);                     \
 638           }                                                                   \
 639         else                                                                  \
 640           function_done = __printf_fp (s, &fspec->info, &ptr);                \
 641                                                                               \
 642         if (function_done < 0)                                                \
 643           /* Error in print handler.  */                                      \
 644           return -1;                                                          \
 645                                                                               \
 646         done += function_done;                                                \
 647       }                                                                       \
 648       break;                                                                  \
 649                                                                               \
 650     LABEL (form_character):                                                   \
 651       /* Character.  */                                                       \
 652       --width;  /* Account for the character itself.  */                      \
 653       if (!left)                                                              \
 654         PAD (' ');                                                            \
 655       outchar ((unsigned char) va_arg (ap, int));       /* Promoted.  */      \
 656       if (left)                                                               \
 657         PAD (' ');                                                            \
 658       break;                                                                  \
 659                                                                               \
 660     LABEL (form_string):                                                      \
 661       {                                                                       \
 662         size_t len;                                                           \
 663                                                                               \
 664         /* The string argument could in fact be `char *' or `wchar_t *'.      \
 665            But this should not make a difference here.  */                    \
 666         string = (char *) va_arg (ap, const char *);                          \
 667                                                                               \
 668         /* Entry point for printing other strings.  */                        \
 669       LABEL (print_string):                                                   \
 670                                                                               \
 671         if (string == NULL)                                                   \
 672           {                                                                   \
 673             /* Write "(null)" if there's space.  */                           \
 674             if (prec == -1 || prec >= (int) sizeof (null) - 1)                \
 675               {                                                               \
 676                 string = (char *) null;                                       \
 677                 len = sizeof (null) - 1;                                      \
 678               }                                                               \
 679             else                                                              \
 680               {                                                               \
 681                 string = (char *) "";                                         \
 682                 len = 0;                                                      \
 683               }                                                               \
 684           }                                                                   \
 685         else if (!is_long)                                                    \
 686           {                                                                   \
 687             if (prec != -1)                                                   \
 688               {                                                               \
 689                 /* Search for the end of the string, but don't search past    \
 690                    the length specified by the precision.  */                 \
 691                 const char *end = memchr (string, '\0', prec);                \
 692                 if (end)                                                      \
 693                   len = end - string;                                         \
 694                 else                                                          \
 695                   len = prec;                                                 \
 696               }                                                               \
 697             else                                                              \
 698               len = strlen (string);                                          \
 699           }                                                                   \
 700         else                                                                  \
 701           {                                                                   \
 702             const wchar_t *s2 = (const wchar_t *) string;                     \
 703             mbstate_t mbstate = 0;                                            \
 704                                                                               \
 705             len = wcsrtombs (NULL, &s2, prec != -1 ? prec : UINT_MAX,         \
 706                              &mbstate);                                       \
 707             if (len == (size_t) -1)                                           \
 708               /* Illegal wide-character string.  */                           \
 709               return -1;                                                      \
 710                                                                               \
 711             s2 = (const wchar_t *) string;                                    \
 712             mbstate = 0;                                                      \
 713             string = alloca (len + 1);                                        \
 714             (void) wcsrtombs (string, &s2, prec != -1 ? prec : UINT_MAX,      \
 715                               &mbstate);                                      \
 716           }                                                                   \
 717                                                                               \
 718         if ((width -= len) < 0)                                               \
 719           {                                                                   \
 720             outstring (string, len);                                          \
 721             break;                                                            \
 722           }                                                                   \
 723                                                                               \
 724         if (!left)                                                            \
 725           PAD (' ');                                                          \
 726         outstring (string, len);                                              \
 727         if (left)                                                             \
 728           PAD (' ');                                                          \
 729       }                                                                       \
 730       break;                                                                  \
 731                                                                               \
 732     LABEL (form_pointer):                                                     \
 733       /* Generic pointer.  */                                                 \
 734       {                                                                       \
 735         const void *ptr;                                                      \
 736         ptr = va_arg (ap, void *);                                            \
 737         if (ptr != NULL)                                                      \
 738           {                                                                   \
 739             /* If the pointer is not NULL, write it as a %#x spec.  */        \
 740             base = 16;                                                        \
 741             number.word = (unsigned long int) ptr;                            \
 742             is_negative = 0;                                                  \
 743             alt = 1;                                                          \
 744             group = 0;                                                        \
 745             spec = 'x';                                                       \
 746             goto LABEL (number);                                              \
 747           }                                                                   \
 748         else                                                                  \
 749           {                                                                   \
 750             /* Write "(nil)" for a nil pointer.  */                           \
 751             string = (char *) "(nil)";                                        \
 752             /* Make sure the full string "(nil)" is printed.  */              \
 753             if (prec < 5)                                                     \
 754               prec = 5;                                                       \
 755             is_long = 0;        /* This is no wide-char string.  */           \
 756             goto LABEL (print_string);                                        \
 757           }                                                                   \
 758       }                                                                       \
 759       /* NOTREACHED */                                                        \
 760                                                                               \
 761     LABEL (form_number):                                                      \
 762       /* Answer the count of characters written.  */                          \
 763       if (is_longlong)                                                        \
 764         *(long long int *) va_arg (ap, void *) = done;                        \
 765       else if (is_long)                                                       \
 766         *(long int *) va_arg (ap, void *) = done;                             \
 767       else if (!is_short)                                                     \
 768         *(int *) va_arg (ap, void *) = done;                                  \
 769       else                                                                    \
 770         *(short int *) va_arg (ap, void *) = done;                            \
 771       break;                                                                  \
 772                                                                               \
 773     LABEL (form_strerror):                                                    \
 774       /* Print description of error ERRNO.  */                                \
 775       {                                                                       \
 776         extern char *_strerror_internal __P ((int, char *buf, size_t));       \
 777                                                                               \
 778         string = (char *)                                                     \
 779           _strerror_internal (errno, work_buffer, sizeof work_buffer);        \
 780       }                                                                       \
 781       is_long = 0;              /* This is no wide-char string.  */           \
 782       goto LABEL (print_string)
 783
 784
 785   /* Sanity check of arguments.  */
 786   ARGCHECK (s, format);
 787
 788   if (UNBUFFERED_P (s))
 789     /* Use a helper function which will allocate a local temporary buffer
 790        for the stream and then call us again.  */
 791     return buffered_vfprintf (s, format, ap);
 792
 793   /* Initialize local variables.  */
 794   done = 0;
 795   grouping = (const char *) -1;
 796   mbstate = 0;
 797   ap_save = ap;
 798   nspecs_done = 0;
 799
 800   /* Find the first format specifier.  */
 801   f = lead_str_end = find_spec (format, &mbstate);
 802
 803   /* Write the literal text before the first format.  */
 804   outstring ((const UCHAR_T *) format,
 805              lead_str_end - (const UCHAR_T *) format);
 806
 807   /* If we only have to print a simple string, return now.  */
 808   if (*f == L_('\0'))
 809     return done;
 810
 811   /* Process whole format string.  */
 812   do
 813     {
 814 #define REF(Name) &&do_##Name
 815 #define LABEL(Name) do_##Name
 816       STEP0_3_TABLE;
 817       STEP4_TABLE;
 818
 819       int is_negative;  /* Flag for negative number.  */
 820       union
 821       {
 822         unsigned long long int longlong;
 823         unsigned long int word;
 824       } number;
 825       int base;
 826       union printf_arg the_arg;
 827       char *string;     /* Pointer to argument string.  */
 828       int alt = 0;      /* Alternate format.  */
 829       int space = 0;    /* Use space prefix if no sign is needed.  */
 830       int left = 0;     /* Left-justify output.  */
 831       int showsign = 0; /* Always begin with plus or minus sign.  */
 832       int group = 0;    /* Print numbers according grouping rules.  */
 833       int is_long_double = 0; /* Argument is long double/ long long int.  */
 834       int is_short = 0; /* Argument is long int.  */
 835       int is_long = 0;  /* Argument is short int.  */
 836       int width = 0;    /* Width of output; 0 means none specified.  */
 837       int prec = -1;    /* Precision of output; -1 means none specified.  */
 838       char pad = ' ';   /* Padding character.  */
 839       CHAR_T spec;
 840
 841       /* Get current character in format string.  */
 842       JUMP (*++f, step0_jumps);
 843
 844       /* ' ' flag.  */
 845     LABEL (flag_space):
 846       space = 1;
 847       JUMP (*++f, step0_jumps);
 848
 849       /* '+' flag.  */
 850     LABEL (flag_plus):
 851       showsign = 1;
 852       JUMP (*++f, step0_jumps);
 853
 854       /* The '-' flag.  */
 855     LABEL (flag_minus):
 856       left = 1;
 857       pad = L_(' ');
 858       JUMP (*++f, step0_jumps);
 859
 860       /* The '#' flag.  */
 861     LABEL (flag_hash):
 862       alt = 1;
 863       JUMP (*++f, step0_jumps);
 864
 865       /* The '0' flag.  */
 866     LABEL (flag_zero):
 867       if (!left)
 868         pad = L_('0');
 869       JUMP (*++f, step0_jumps);
 870
 871       /* The '\'' flag.  */
 872     LABEL (flag_quote):
 873       group = 1;
 874
 875       /* XXX Completely wrong.  Use wctob.  */
 876       if (grouping == (const char *) -1)
 877         {
 878           /* Figure out the thousands separator character.  */
 879           if (mbtowc (&thousands_sep,
 880                       _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
 881                       strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
 882             thousands_sep = (wchar_t)
 883               *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
 884           grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
 885           if (*grouping == '\0' || *grouping == CHAR_MAX
 886               || thousands_sep == L'\0')
 887             grouping = NULL;
 888         }
 889       JUMP (*++f, step0_jumps);
 890
 891       /* Get width from argument.  */
 892     LABEL (width_asterics):
 893       {
 894         const UCHAR_T *tmp;     /* Temporary value.  */
 895
 896         tmp = ++f;
 897         if (ISDIGIT (*tmp) && read_int (&tmp) && *tmp == L_('$'))
 898           /* The width comes from a positional parameter.  */
 899           goto do_positional;
 900
 901         width = va_arg (ap, int);
 902
 903         /* Negative width means left justified.  */
 904         if (width < 0)
 905           {
 906             width = -width;
 907             pad = L_(' ');
 908             left = 1;
 909           }
 910       }
 911       JUMP (*f, step1_jumps);
 912
 913       /* Given width in format string.  */
 914     LABEL (width):
 915       width = read_int (&f);
 916       if (*f == L_('$'))
 917         /* Oh, oh.  The argument comes from a positional parameter.  */
 918         goto do_positional;
 919       JUMP (*f, step1_jumps);
 920
 921     LABEL (precision):
 922       ++f;
 923       if (*f == L_('*'))
 924         {
 925           const UCHAR_T *tmp;   /* Temporary value.  */
 926
 927           tmp = ++f;
 928           if (ISDIGIT (*tmp) && read_int (&tmp) > 0 && *tmp == L_('$'))
 929             /* The precision comes from a positional parameter.  */
 930             goto do_positional;
 931
 932           prec = va_arg (ap, int);
 933
 934           /* If the precision is negative the precision is omitted.  */
 935           if (prec < 0)
 936             prec = -1;
 937         }
 938       else if (ISDIGIT (*f))
 939         prec = read_int (&f);
 940       else
 941         prec = 0;
 942       JUMP (*f, step2_jumps);
 943
 944       /* Process 'h' modifier.  No other modifier is allowed to
 945          follow.  */
 946     LABEL (mod_half):
 947       is_short = 1;
 948       JUMP (*++f, step4_jumps);
 949
 950       /* Process 'l' modifier.  There might another 'l' follow.  */
 951     LABEL (mod_long):
 952       is_long = 1;
 953       JUMP (*++f, step3_jumps);
 954
 955       /* Process 'L', 'q', or 'll' modifier.  No other modifier is
 956          allowed to follow.  */
 957     LABEL (mod_longlong):
 958       is_long_double = 1;
 959       JUMP (*++f, step4_jumps);
 960
 961     LABEL (mod_size_t):
 962       is_longlong = sizeof (size_t) > sizeof (unsigned long int);
 963       is_long = sizeof (size_t) > sizeof (unsigned int);
 964       JUMP (*++f, step4_jumps);
 965
 966
 967       /* Process current format.  */
 968       while (1)
 969         {
 970           process_arg (((struct printf_spec *) NULL));
 971
 972         LABEL (form_unknown):
 973           if (spec == L_('\0'))
 974             /* The format string ended before the specifier is complete.  */
 975             return -1;
 976
 977           /* If we are in the fast loop force entering the complicated
 978              one.  */
 979           goto do_positional;
 980         }
 981
 982       /* Look for next format specifier.  */
 983       f = find_spec ((end_of_spec = ++f), &mbstate);
 984
 985       /* Write the following constant string.  */
 986       outstring (end_of_spec, f - end_of_spec);
 987     }
 988   while (*f != L_('\0'));
 989
 990   /* We processed the whole format without any positional parameters.  */
 991   return done;
 992
 993   /* Here starts the more complex loop to handle positional parameters.  */
 994 do_positional:
 995   {
 996     /* Array with information about the needed arguments.  This has to
 997        be dynamically extendable.  */
 998     size_t nspecs = 0;
 999     size_t nspecs_max = 32;     /* A more or less arbitrary start value.  */
1000     struct printf_spec *specs
1001       = alloca (nspecs_max * sizeof (struct printf_spec));
1002
1003     /* The number of arguments the format string requests.  This will
1004        determine the size of the array needed to store the argument
1005        attributes.  */
1006     size_t nargs = 0;
1007     int *args_type;
1008     union printf_arg *args_value;
1009
1010     /* Positional parameters refer to arguments directly.  This could
1011        also determine the maximum number of arguments.  Track the
1012        maximum number.  */
1013     size_t max_ref_arg = 0;
1014
1015     /* Just a counter.  */
1016     int cnt;
1017
1018
1019     if (grouping == (const char *) -1)
1020       {
1021         /* XXX Use wctob.  But this is incompatible for now.  */
1022         /* Figure out the thousands separator character.  */
1023         if (mbtowc (&thousands_sep,
1024                     _NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP),
1025                     strlen (_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP))) <= 0)
1026           thousands_sep = (wchar_t) *_NL_CURRENT (LC_NUMERIC, THOUSANDS_SEP);
1027         grouping = _NL_CURRENT (LC_NUMERIC, GROUPING);
1028         if (*grouping == '\0' || *grouping == CHAR_MAX
1029             || thousands_sep == L'\0')
1030           grouping = NULL;
1031       }
1032
1033     for (f = lead_str_end; *f != '\0'; f = specs[nspecs++].next_fmt)
1034       {
1035         if (nspecs >= nspecs_max)
1036           {
1037             /* Extend the array of format specifiers.  */
1038             struct printf_spec *old = specs;
1039
1040             nspecs_max *= 2;
1041             specs = alloca (nspecs_max * sizeof (struct printf_spec));
1042
1043             if (specs == &old[nspecs])
1044               /* Stack grows up, OLD was the last thing allocated;
1045                  extend it.  */
1046               nspecs_max += nspecs_max / 2;
1047             else
1048               {
1049                 /* Copy the old array's elements to the new space.  */
1050                 memcpy (specs, old, nspecs * sizeof (struct printf_spec));
1051                 if (old == &specs[nspecs])
1052                   /* Stack grows down, OLD was just below the new
1053                      SPECS.  We can use that space when the new space
1054                      runs out.  */
1055                   nspecs_max += nspecs_max / 2;
1056               }
1057           }
1058
1059         /* Parse the format specifier.  */
1060         nargs += parse_one_spec (f, nargs, &specs[nspecs], &max_ref_arg, NULL);
1061       }
1062
1063     /* Determine the number of arguments the format string consumes.  */
1064     nargs = MAX (nargs, max_ref_arg);
1065
1066     /* Allocate memory for the argument descriptions.  */
1067     args_type = alloca (nargs * sizeof (int));
1068     memset (args_type, 0, nargs * sizeof (int));
1069     args_value = alloca (nargs * sizeof (union printf_arg));
1070
1071     /* XXX Could do sanity check here: If any element in ARGS_TYPE is
1072        still zero after this loop, format is invalid.  For now we
1073        simply use 0 as the value.  */
1074
1075     /* Fill in the types of all the arguments.  */
1076     for (cnt = 0; cnt < nspecs; ++cnt)
1077       {
1078         /* If the width is determined by an argument this is an int.  */
1079         if (specs[cnt].width_arg != -1)
1080           args_type[specs[cnt].width_arg] = PA_INT;
1081
1082         /* If the precision is determined by an argument this is an int.  */
1083         if (specs[cnt].prec_arg != -1)
1084           args_type[specs[cnt].prec_arg] = PA_INT;
1085
1086         switch (specs[cnt].ndata_args)
1087           {
1088           case 0:               /* No arguments.  */
1089             break;
1090           case 1:               /* One argument; we already have the type.  */
1091             args_type[specs[cnt].data_arg] = specs[cnt].data_arg_type;
1092             break;
1093           default:
1094             /* We have more than one argument for this format spec.
1095                We must call the arginfo function again to determine
1096                all the types.  */
1097             (void) (*__printf_arginfo_table[specs[cnt].info.spec])
1098               (&specs[cnt].info,
1099                specs[cnt].ndata_args, &args_type[specs[cnt].data_arg]);
1100             break;
1101           }
1102       }
1103
1104     /* Now we know all the types and the order.  Fill in the argument
1105        values.  */
1106     for (cnt = 0, ap = ap_save; cnt < nargs; ++cnt)
1107       switch (args_type[cnt])
1108         {
1109 #define T(tag, mem, type)                                                     \
1110         case tag:                                                             \
1111           args_value[cnt].mem = va_arg (ap, type);                            \
1112           break
1113
1114         T (PA_CHAR, pa_char, int); /* Promoted.  */
1115         T (PA_INT|PA_FLAG_SHORT, pa_short_int, int); /* Promoted.  */
1116         T (PA_INT, pa_int, int);
1117         T (PA_INT|PA_FLAG_LONG, pa_long_int, long int);
1118         T (PA_INT|PA_FLAG_LONG_LONG, pa_long_long_int, long long int);
1119         T (PA_FLOAT, pa_float, double); /* Promoted.  */
1120         T (PA_DOUBLE, pa_double, double);
1121         T (PA_DOUBLE|PA_FLAG_LONG_DOUBLE, pa_long_double, long double);
1122         T (PA_STRING, pa_string, const char *);
1123         T (PA_POINTER, pa_pointer, void *);
1124 #undef T
1125         default:
1126           if ((args_type[cnt] & PA_FLAG_PTR) != 0)
1127             args_value[cnt].pa_pointer = va_arg (ap, void *);
1128           else
1129             args_value[cnt].pa_long_double = 0.0;
1130           break;
1131         }
1132
1133     /* Now walk through all format specifiers and process them.  */
1134     for (; nspecs_done < nspecs; ++nspecs_done)
1135       {
1136 #undef REF
1137 #define REF(Name) &&do2_##Name
1138 #undef LABEL
1139 #define LABEL(Name) do2_##Name
1140         STEP4_TABLE;
1141
1142         int is_negative;
1143         union
1144         {
1145           unsigned long long int longlong;
1146           unsigned long int word;
1147         } number;
1148         int base;
1149         union printf_arg the_arg;
1150         char *string;   /* Pointer to argument string.  */
1151
1152         /* Fill variables from values in struct.  */
1153         int alt = specs[nspecs_done].info.alt;
1154         int space = specs[nspecs_done].info.space;
1155         int left = specs[nspecs_done].info.left;
1156         int showsign = specs[nspecs_done].info.showsign;
1157         int group = specs[nspecs_done].info.group;
1158         int is_long_double = specs[nspecs_done].info.is_long_double;
1159         int is_short = specs[nspecs_done].info.is_short;
1160         int is_long = specs[nspecs_done].info.is_long;
1161         int width = specs[nspecs_done].info.width;
1162         int prec = specs[nspecs_done].info.prec;
1163         char pad = specs[nspecs_done].info.pad;
1164         CHAR_T spec = specs[nspecs_done].info.spec;
1165
1166         /* Fill in last information.  */
1167         if (specs[nspecs_done].width_arg != -1)
1168           {
1169             /* Extract the field width from an argument.  */
1170             specs[nspecs_done].info.width =
1171               args_value[specs[nspecs_done].width_arg].pa_int;
1172
1173             if (specs[nspecs_done].info.width < 0)
1174               /* If the width value is negative left justification is
1175                  selected and the value is taken as being positive.  */
1176               {
1177                 specs[nspecs_done].info.width *= -1;
1178                 left = specs[nspecs_done].info.left = 1;
1179               }
1180             width = specs[nspecs_done].info.width;
1181           }
1182
1183         if (specs[nspecs_done].prec_arg != -1)
1184           {
1185             /* Extract the precision from an argument.  */
1186             specs[nspecs_done].info.prec =
1187               args_value[specs[nspecs_done].prec_arg].pa_int;
1188
1189             if (specs[nspecs_done].info.prec < 0)
1190               /* If the precision is negative the precision is
1191                  omitted.  */
1192               specs[nspecs_done].info.prec = -1;
1193
1194             prec = specs[nspecs_done].info.prec;
1195           }
1196
1197         /* Process format specifiers.  */
1198         while (1)
1199           {
1200             JUMP (spec, step4_jumps);
1201
1202             process_arg ((&specs[nspecs_done]));
1203
1204           LABEL (form_unknown):
1205             {
1206               extern printf_function **__printf_function_table;
1207               int function_done;
1208               printf_function *function;
1209               unsigned int i;
1210               const void **ptr;
1211
1212               function =
1213                 (__printf_function_table == NULL ? NULL :
1214                  __printf_function_table[specs[nspecs_done].info.spec]);
1215
1216               if (function == NULL)
1217                 function = &printf_unknown;
1218
1219               ptr = alloca (specs[nspecs_done].ndata_args
1220                             * sizeof (const void *));
1221
1222               /* Fill in an array of pointers to the argument values.  */
1223               for (i = 0; i < specs[nspecs_done].ndata_args; ++i)
1224                 ptr[i] = &args_value[specs[nspecs_done].data_arg + i];
1225
1226               /* Call the function.  */
1227               function_done = (*function) (s, &specs[nspecs_done].info, ptr);
1228
1229               /* If an error occured we don't have information about #
1230                  of chars.  */
1231               if (function_done < 0)
1232                 return -1;
1233
1234               done += function_done;
1235             }
1236             break;
1237           }
1238
1239         /* Write the following constant string.  */
1240         outstring (specs[nspecs_done].end_of_fmt,
1241                    specs[nspecs_done].next_fmt
1242                    - specs[nspecs_done].end_of_fmt);
1243       }
1244   }
1245
1246   return done;
1247 }
1248
1249 #ifdef USE_IN_LIBIO
1250 # undef vfprintf
1251 # ifdef strong_alias
1252 /* This is for glibc.  */
1253 strong_alias (_IO_vfprintf, vfprintf);
1254 # else
1255 #  if defined __ELF__ || defined __GNU_LIBRARY__
1256 #   include <gnu-stabs.h>
1257 #   ifdef weak_alias
1258 weak_alias (_IO_vfprintf, vfprintf);
1259 #   endif
1260 #  endif
1261 # endif
1262 #endif
1263 \f
1264 /* Handle an unknown format specifier.  This prints out a canonicalized
1265    representation of the format spec itself.  */
1266 static int
1267 printf_unknown (FILE *s, const struct printf_info *info,
1268                 const void *const *args)
1269
1270 {
1271   int done = 0;
1272   char work_buffer[BUFSIZ];
1273   register char *w;
1274
1275   outchar ('%');
1276
1277   if (info->alt)
1278     outchar ('#');
1279   if (info->group)
1280     outchar ('\'');
1281   if (info->showsign)
1282     outchar ('+');
1283   else if (info->space)
1284     outchar (' ');
1285   if (info->left)
1286     outchar ('-');
1287   if (info->pad == '0')
1288     outchar ('0');
1289
1290   if (info->width != 0)
1291     {
1292       w = _itoa_word (info->width, workend + 1, 10, 0);
1293       while (++w <= workend)
1294         outchar (*w);
1295     }
1296
1297   if (info->prec != -1)
1298     {
1299       outchar ('.');
1300       w = _itoa_word (info->prec, workend + 1, 10, 0);
1301       while (++w <= workend)
1302         outchar (*w);
1303     }
1304
1305   if (info->spec != '\0')
1306     outchar (info->spec);
1307
1308   return done;
1309 }
1310 \f
1311 /* Group the digits according to the grouping rules of the current locale.
1312    The interpretation of GROUPING is as in `struct lconv' from <locale.h>.  */
1313 static char *
1314 group_number (CHAR_T *w, CHAR_T *rear_ptr, const CHAR_T *grouping,
1315               wchar_t thousands_sep)
1316 {
1317   int len;
1318   char *src, *s;
1319
1320   /* We treat all negative values like CHAR_MAX.  */
1321
1322   if (*grouping == CHAR_MAX || *grouping < 0)
1323     /* No grouping should be done.  */
1324     return w;
1325
1326   len = *grouping;
1327
1328   /* Copy existing string so that nothing gets overwritten.  */
1329   src = (char *) alloca (rear_ptr - w);
1330   memcpy (src, w + 1, rear_ptr - w);
1331   s = &src[rear_ptr - w - 1];
1332   w = rear_ptr;
1333
1334   /* Process all characters in the string.  */
1335   while (s >= src)
1336     {
1337       *w-- = *s--;
1338
1339       if (--len == 0 && s >= src)
1340         {
1341           /* A new group begins.  */
1342           *w-- = thousands_sep;
1343
1344           len = *grouping++;
1345           if (*grouping == '\0')
1346             /* The previous grouping repeats ad infinitum.  */
1347             --grouping;
1348           else if (*grouping == CHAR_MAX || *grouping < 0)
1349             {
1350               /* No further grouping to be done.
1351                  Copy the rest of the number.  */
1352               do
1353                 *w-- = *s--;
1354               while (s >= src);
1355               break;
1356             }
1357         }
1358     }
1359   return w;
1360 }
1361 \f
1362 #ifdef USE_IN_LIBIO
1363 /* Helper "class" for `fprintf to unbuffered': creates a temporary buffer.  */
1364 struct helper_file
1365   {
1366     struct _IO_FILE_plus _f;
1367     _IO_FILE *_put_stream;
1368   };
1369
1370 static int
1371 _IO_helper_overflow (_IO_FILE *s, int c)
1372 {
1373   _IO_FILE *target = ((struct helper_file*) s)->_put_stream;
1374   int used = s->_IO_write_ptr - s->_IO_write_base;
1375   if (used)
1376     {
1377       _IO_size_t written = _IO_sputn (target, s->_IO_write_base, used);
1378       s->_IO_write_ptr -= written;
1379     }
1380   return _IO_putc (c, s);
1381 }
1382
1383 static const struct _IO_jump_t _IO_helper_jumps =
1384 {
1385   JUMP_INIT_DUMMY,
1386   JUMP_INIT (finish, _IO_default_finish),
1387   JUMP_INIT (overflow, _IO_helper_overflow),
1388   JUMP_INIT (underflow, _IO_default_underflow),
1389   JUMP_INIT (uflow, _IO_default_uflow),
1390   JUMP_INIT (pbackfail, _IO_default_pbackfail),
1391   JUMP_INIT (xsputn, _IO_default_xsputn),
1392   JUMP_INIT (xsgetn, _IO_default_xsgetn),
1393   JUMP_INIT (seekoff, _IO_default_seekoff),
1394   JUMP_INIT (seekpos, _IO_default_seekpos),
1395   JUMP_INIT (setbuf, _IO_default_setbuf),
1396   JUMP_INIT (sync, _IO_default_sync),
1397   JUMP_INIT (doallocate, _IO_default_doallocate),
1398   JUMP_INIT (read, _IO_default_read),
1399   JUMP_INIT (write, _IO_default_write),
1400   JUMP_INIT (seek, _IO_default_seek),
1401   JUMP_INIT (close, _IO_default_close),
1402   JUMP_INIT (stat, _IO_default_stat)
1403 };
1404
1405 static int
1406 buffered_vfprintf (register _IO_FILE *s, const CHAR_T *format,
1407                    _IO_va_list args)
1408 {
1409   char buf[_IO_BUFSIZ];
1410   struct helper_file helper;
1411   register _IO_FILE *hp = (_IO_FILE *) &helper;
1412   int result, to_flush;
1413
1414   /* Initialize helper.  */
1415   helper._put_stream = s;
1416   hp->_IO_write_base = buf;
1417   hp->_IO_write_ptr = buf;
1418   hp->_IO_write_end = buf + sizeof buf;
1419   hp->_IO_file_flags = _IO_MAGIC|_IO_NO_READS;
1420   _IO_JUMPS (hp) = (struct _IO_jump_t *) &_IO_helper_jumps;
1421
1422   /* Now print to helper instead.  */
1423   result = _IO_vfprintf (hp, format, args);
1424
1425   /* Now flush anything from the helper to the S. */
1426   if ((to_flush = hp->_IO_write_ptr - hp->_IO_write_base) > 0)
1427     {
1428       if (_IO_sputn (s, hp->_IO_write_base, to_flush) != to_flush)
1429         return -1;
1430     }
1431
1432   return result;
1433 }
1434
1435 #else /* !USE_IN_LIBIO */
1436
1437 static int
1438 buffered_vfprintf (register FILE *s, const CHAR_T *format, va_list args)
1439 {
1440   char buf[BUFSIZ];
1441   int result;
1442
1443   s->__bufp = s->__buffer = buf;
1444   s->__bufsize = sizeof buf;
1445   s->__put_limit = s->__buffer + s->__bufsize;
1446   s->__get_limit = s->__buffer;
1447
1448   /* Now use buffer to print.  */
1449   result = vfprintf (s, format, args);
1450
1451   if (fflush (s) == EOF)
1452     result = -1;
1453   s->__buffer = s->__bufp = s->__get_limit = s->__put_limit = NULL;
1454   s->__bufsize = 0;
1455
1456   return result;
1457 }
1458 \f
1459 /* Pads string with given number of a specified character.
1460    This code is taken from iopadn.c of the GNU I/O library.  */
1461 #define PADSIZE 16
1462 static const CHAR_T blanks[PADSIZE] =
1463 { L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '),
1464   L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' '), L_(' ') };
1465 static const CHAR_T zeroes[PADSIZE] =
1466 { L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'),
1467   L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0'), L_('0') };
1468
1469 ssize_t
1470 #ifndef COMPILE_WPRINTF
1471 __printf_pad (FILE *s, char pad, size_t count)
1472 #else
1473 __wprintf_pad (FILE *s, wchar_t pad, size_t count)
1474 #endif
1475 {
1476   const CHAR_T *padptr;
1477   register size_t i;
1478
1479   padptr = pad == L_(' ') ? blanks : zeroes;
1480
1481   for (i = count; i >= PADSIZE; i -= PADSIZE)
1482     if (PUT (s, padptr, PADSIZE) != PADSIZE)
1483       return -1;
1484   if (i > 0)
1485     if (PUT (s, padptr, i) != i)
1486       return -1;
1487
1488   return count;
1489 }
1490 #undef PADSIZE
1491 #endif /* USE_IN_LIBIO */