mware/formatwr.c

   1 /*!
   2  * \file
   3  * <!--
   4  * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
   5  * This file is part of DevLib - See devlib/README for information.
   6  * -->
   7  *
   8  * \version $Id$
   9  *
  10  * \brief Basic "printf", "sprintf" and "fprintf" formatter.
  11  *
  12  * This module is 100% reentrant and can be adapted to user-defined routines
  13  * that needs formatters with special properties like different output
  14  * channels or new format specifiers.
  15  *
  16  * To reduce size in applications not using real numbers or long integers
  17  * the formatter may be compiled to exclude certain parts.  This is
  18  * controlled by giving a -D option a compilation time:
  19  *
  20  * \code
  21  *  -D CONFIG_PRINTF=PRINTF_FULL         Full ANSI printf formatter
  22  *  -D CONFIG_PRINTF=PRINTF_NOFLOAT      Exclude support for floats
  23  *  -D CONFIG_PRINTF=PRINTF_REDUCED      Simplified formatter (see below)
  24  *  -D CONFIG_PRINTF=PRINTF_NOMODIFIERS  Exclude 'l' and 'h' modifiers in reduced version
  25  *  -D CONFIG_PRINTF=PRINTF_DISABLED     No formatter at all
  26  * \endcode
  27  *
  28  * Code size on AVR4 with GCC 3.4.1 (-O2):
  29  *   PRINTF_FULL        2912byte (0xB60)
  30  *   PRINTF_NOFLOAT     1684byte (0x694)
  31  *   PRINTF_REDUCED      924byte (0x39C)
  32  *   PRINTF_NOMODIFIERS  416byte (0x1A0)
  33  *
  34  * Code/data size in words on DSP56K with CodeWarrior 6.0:
  35  *   PRINTF_FULL         1493/45
  36  *   PRINTF_NOFLOAT      795/45
  37  *   PRINTF_REDUCED      482/0
  38  *   PRINTF_NOMODIFIERS  301/0
  39  *
  40  * The reduced version of formatter is suitable when program size is critical
  41  * rather than formatting power.  This routine uses less than 20 bytes of
  42  * stack space which makes it practical even in systems with less than 256
  43  * bytes of user RAM.
  44  *
  45  * The only formatting specifiers supported by the reduced formatter are:
  46  * \code
  47  *    %% %c %s %d %o %x %X and %hd %ho %hx %hX %ld %lo %lx %lX
  48  * \endcode
  49  *
  50  * It means that real variables are not supported as well as field
  51  * width and precision arguments.
  52  */
  53
  54 /*#*
  55  *#* $Log$
  56  *#* Revision 1.8  2004/08/25 14:12:09  rasky
  57  *#* Aggiornato il comment block dei log RCS
  58  *#*
  59  *#* Revision 1.7  2004/08/04 15:53:47  rasky
  60  *#* Nuove opzioni di configurazione per formatted_write e ridotto maggiormente l'utilizzo dellos tack
  61  *#*
  62  *#* Revision 1.6  2004/07/30 14:34:10  rasky
  63  *#* Vari fix per documentazione e commenti
  64  *#* Aggiunte PP_CATn e STATIC_ASSERT
  65  *#*
  66  *#* Revision 1.5  2004/07/29 22:57:09  bernie
  67  *#* Switch to new-style config handling.
  68  *#*
  69  *#* Revision 1.4  2004/07/21 00:20:20  bernie
  70  *#* Allow completely disabling printf()-like formatter.
  71  *#*
  72  *#* Revision 1.3  2004/07/18 22:00:15  bernie
  73  *#* Reorganize configuration parameters to match DevLib's convention.
  74  *#*
  75  *#* Revision 1.2  2004/06/03 11:27:09  bernie
  76  *#* Add dual-license information.
  77  *#*
  78  *#* Revision 1.1  2004/05/23 15:43:16  bernie
  79  *#* Import mware modules.
  80  *#*
  81  *#*/
  82
  83 #include "formatwr.h"
  84 #include <compiler.h> /* progmem macros */
  85 #include <config.h> /* CONFIG_ macros */
  86 #include <drv/kdebug.h> /* ASSERT */
  87
  88 #ifndef CONFIG_PRINTF_N_FORMATTER
  89         /*! Enable arcane %n formatter */
  90         #define CONFIG_PRINTF_N_FORMATTER 0
  91 #endif
  92
  93 #ifndef CONFIG_PRINTF_OCTAL_FORMATTER
  94         /*! Enable %o formatter */
  95         #define CONFIG_PRINTF_OCTAL_FORMATTER 0
  96 #endif
  97
  98 // True if we must keep a count of the number of characters we print
  99 #define CONFIG_PRINTF_COUNT_CHARS (CONFIG_PRINTF_RETURN_COUNT || CONFIG_PRINTF_N_FORMATTER)
 100
 101 #if CONFIG_PRINTF
 102
 103 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 104 #include <float.h>
 105 #endif /* CONFIG_PRINTF > PRINTF_NOFLOAT */
 106
 107 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 108 /*bernie: save some memory, who cares about floats with lots of decimals? */
 109 /*#define FRMWRI_BUFSIZE 134*/
 110         #error 134 is too much, the code must be fixed to have a lower precision limit
 111 #else
 112         /*
 113          * Conservative estimate. Should be (probably) 12 (which is the size necessary
 114          * to represent (2^32-1) in octal plus the sign bit
 115          */
 116         #define FRMWRI_BUFSIZE 16
 117 #endif
 118
 119 #ifndef MEM_ATTRIBUTE
 120 #define MEM_ATTRIBUTE
 121 #endif
 122
 123 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 124         #define IS_SHORT (h_modifier || (sizeof(int) == 2 && !l_modifier))
 125 #else
 126         #define IS_SHORT (sizeof(int) == 2)
 127 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 128
 129
 130 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 131
 132 static char *float_conversion(MEM_ATTRIBUTE long double value,
 133                 MEM_ATTRIBUTE short nr_of_digits,
 134                 MEM_ATTRIBUTE char *buf,
 135                 MEM_ATTRIBUTE char format_flag,
 136                 MEM_ATTRIBUTE char g_flag,
 137                 MEM_ATTRIBUTE bool alternate_flag)
 138 {
 139         MEM_ATTRIBUTE char *cp;
 140         MEM_ATTRIBUTE char *buf_pointer;
 141         MEM_ATTRIBUTE short n, i, dec_point_pos, integral_10_log;
 142
 143         buf_pointer = buf;
 144         integral_10_log = 0;
 145
 146         if (value >= 1)
 147         {
 148                 while (value >= 1e11) /* To speed up things a bit */
 149                 {
 150                         value /= 1e10;
 151                         integral_10_log += 10;
 152                 }
 153                 while (value >= 10)
 154                 {
 155                         value /= 10;
 156                         integral_10_log++;
 157                 }
 158         }
 159         else if (value) /* Not just 0.0 */
 160         {
 161                 while (value <= 1e-10) /* To speed up things a bit */
 162                 {
 163                         value *= 1e10;
 164                         integral_10_log -= 10;
 165                 }
 166                 while (value < 1)
 167                 {
 168                         value *= 10;
 169                         integral_10_log--;
 170                 }
 171         }
 172         if (g_flag)
 173         {
 174                 if (integral_10_log < nr_of_digits && integral_10_log >= -4)
 175                 {
 176                         format_flag = 0;
 177                         nr_of_digits -= integral_10_log;
 178                 }
 179                 nr_of_digits--;
 180                 if (alternate_flag)
 181                         /* %#G - No removal of trailing zeros */
 182                         g_flag = 0;
 183                 else
 184                         /* %G - Removal of trailing zeros */
 185                         alternate_flag = true;
 186         }
 187
 188         /* %e or %E */
 189         if (format_flag)
 190         {
 191                 dec_point_pos = 0;
 192         }
 193         else
 194         {
 195                 /* Less than one... */
 196                 if (integral_10_log < 0)
 197                 {
 198                         *buf_pointer++ = '0';
 199                         if ((n = nr_of_digits) || alternate_flag)
 200                                 *buf_pointer++ = '.';
 201                         i = 0;
 202                         while (--i > integral_10_log && nr_of_digits)
 203                         {
 204                                 *buf_pointer++ = '0';
 205                                 nr_of_digits--;
 206                         }
 207                         if (integral_10_log < (-n - 1))
 208                                 /* Nothing more to do */
 209                                 goto CLEAN_UP;
 210                         dec_point_pos = 1;
 211                 }
 212                 else
 213                 {
 214                         dec_point_pos = - integral_10_log;
 215                 }
 216         }
 217
 218         i = dec_point_pos;
 219         while (i <= nr_of_digits )
 220         {
 221                 value -= (long double)(n = (short)value); /* n=Digit value=Remainder */
 222                 value *= 10; /* Prepare for next shot */
 223                 *buf_pointer++ = n + '0';
 224                 if ( ! i++ && (nr_of_digits || alternate_flag))
 225                         *buf_pointer++ = '.';
 226         }
 227
 228         /* Rounding possible */
 229         if (value >= 5)
 230         {
 231                 n = 1; /* Carry */
 232                 cp = buf_pointer - 1;
 233                 do
 234                 {
 235                         if (*cp != '.')
 236                         {
 237                                 if ( (*cp += n) == ('9' + 1) )
 238                                 {
 239                                         *cp = '0';
 240                                         n = 1;
 241                                 }
 242                                 else
 243                                         n = 0;
 244                         }
 245                 } while (cp-- > buf);
 246                 if (n)
 247                 {
 248                         /* %e or %E */
 249                         if (format_flag)
 250                         {
 251                                 cp = buf_pointer;
 252                                 while (cp > buf)
 253                                 {
 254                                         if (*(cp - 1) == '.')
 255                                         {
 256                                                 *cp = *(cp - 2);
 257                                                 cp--;
 258                                         }
 259                                         else
 260                                                 *cp = *(cp - 1);
 261                                         cp--;
 262                                 }
 263                                 integral_10_log++;
 264                         }
 265                         else
 266                         {
 267                                 cp = ++buf_pointer;
 268                                 while (cp > buf)
 269                                 {
 270                                         *cp = *(cp - 1);
 271                                         cp--;
 272                                 }
 273                         }
 274                         *buf = '1';
 275                 }
 276         }
 277
 278 CLEAN_UP:
 279         /* %G - Remove trailing zeros */
 280         if (g_flag)
 281         {
 282                 while (*(buf_pointer - 1) == '0')
 283                         buf_pointer--;
 284                 if (*(buf_pointer - 1) == '.')
 285                         buf_pointer--;
 286         }
 287
 288         /* %e or %E */
 289         if (format_flag)
 290         {
 291                 *buf_pointer++ = format_flag;
 292                 if (integral_10_log < 0)
 293                 {
 294                         *buf_pointer++ = '-';
 295                         integral_10_log = -integral_10_log;
 296                 }
 297                 else
 298                         *buf_pointer++ = '+';
 299                 n = 0;
 300                 buf_pointer +=10;
 301                 do
 302                 {
 303                         n++;
 304                         *buf_pointer++ = (integral_10_log % 10) + '0';
 305                         integral_10_log /= 10;
 306                 } while ( integral_10_log || n < 2 );
 307                 for ( i = n ; n > 0 ; n-- )
 308                         *(buf_pointer - 11 - i + n) = *(buf_pointer - n);
 309                 buf_pointer -= 10;
 310         }
 311         return (buf_pointer);
 312 }
 313
 314 #endif /* CONFIG_PRINTF > PRINTF_NOFLOAT */
 315
 316 /*!
 317  * This routine forms the core and entry of the formatter.
 318  *
 319  * The conversion performed conforms to the ANSI specification for "printf".
 320  */
 321 int
 322 PGM_FUNC(_formatted_write)(const char * PGM_ATTR format,
 323                 void put_one_char(char, void *),
 324                 void *secret_pointer,
 325                 va_list ap)
 326 {
 327 #if CONFIG_PRINTF > PRINTF_REDUCED
 328         MEM_ATTRIBUTE static char bad_conversion[] = "???";
 329         MEM_ATTRIBUTE static char null_pointer[] = "<NULL>";
 330
 331         MEM_ATTRIBUTE int precision;
 332         MEM_ATTRIBUTE int n;
 333 #if CONFIG_PRINTF_COUNT_CHARS
 334         MEM_ATTRIBUTE int nr_of_chars;
 335 #endif
 336         MEM_ATTRIBUTE int field_width;
 337         MEM_ATTRIBUTE char format_flag;
 338         enum PLUS_SPACE_FLAGS {
 339                 PSF_NONE, PSF_PLUS, PSF_MINUS
 340         };
 341         enum DIV_FACTOR {
 342                 DIV_DEC, DIV_HEX,
 343 #if CONFIG_PRINTF_OCTAL_FORMATTER
 344                 DIV_OCT,
 345 #endif
 346         };
 347         struct {
 348                 MEM_ATTRIBUTE enum PLUS_SPACE_FLAGS plus_space_flag : 2;
 349 #if CONFIG_PRINTF_OCTAL_FORMATTER
 350                 MEM_ATTRIBUTE enum DIV_FACTOR div_factor : 2;
 351 #else
 352                 MEM_ATTRIBUTE enum DIV_FACTOR div_factor : 1;
 353 #endif
 354                 MEM_ATTRIBUTE bool left_adjust : 1;
 355                 MEM_ATTRIBUTE bool l_L_modifier : 1;
 356                 MEM_ATTRIBUTE bool h_modifier : 1;
 357                 MEM_ATTRIBUTE bool alternate_flag : 1;
 358                 MEM_ATTRIBUTE bool nonzero_value : 1;
 359                 MEM_ATTRIBUTE bool zeropad : 1;
 360         } flags;
 361         MEM_ATTRIBUTE unsigned long ulong;
 362
 363 #if CONFIG_PRINTF >  PRINTF_NOFLOAT
 364         MEM_ATTRIBUTE long double fvalue;
 365 #endif
 366
 367         MEM_ATTRIBUTE char *buf_pointer;
 368         MEM_ATTRIBUTE char *ptr;
 369         MEM_ATTRIBUTE const char *hex;
 370         MEM_ATTRIBUTE char buf[FRMWRI_BUFSIZE];
 371
 372 #if CONFIG_PRINTF_COUNT_CHARS
 373         nr_of_chars = 0;
 374 #endif
 375         for (;;)    /* Until full format string read */
 376         {
 377                 while ((format_flag = PGM_READ_CHAR(format++)) != '%')    /* Until '%' or '\0' */
 378                 {
 379                         if (!format_flag)
 380 #if CONFIG_PRINTF_RETURN_COUNT
 381                                 return (nr_of_chars);
 382 #else
 383                                 return 0;
 384 #endif
 385                         put_one_char(format_flag, secret_pointer);
 386 #if CONFIG_PRINTF_COUNT_CHARS
 387                         nr_of_chars++;
 388 #endif
 389                 }
 390                 if (PGM_READ_CHAR(format) == '%')    /* %% prints as % */
 391                 {
 392                         format++;
 393                         put_one_char('%', secret_pointer);
 394 #if CONFIG_PRINTF_COUNT_CHARS
 395                         nr_of_chars++;
 396 #endif
 397                         continue;
 398                 }
 399
 400                 flags.left_adjust = false;
 401                 flags.alternate_flag = false;
 402                 flags.plus_space_flag = PSF_NONE;
 403                 flags.zeropad = false;
 404                 ptr = buf_pointer = &buf[0];
 405                 hex = "0123456789ABCDEF";
 406
 407                 /* check for leading '-', '+', ' ','#' or '0' flags  */
 408                 for (;;)
 409                 {
 410                         switch (PGM_READ_CHAR(format))
 411                         {
 412                                 case ' ':
 413                                         if (flags.plus_space_flag)
 414                                                 goto NEXT_FLAG;
 415                                 case '+':
 416                                         flags.plus_space_flag = PSF_PLUS;
 417                                         goto NEXT_FLAG;
 418                                 case '-':
 419                                         flags.left_adjust = true;
 420                                         goto NEXT_FLAG;
 421                                 case '#':
 422                                         flags.alternate_flag = true;
 423                                         goto NEXT_FLAG;
 424                                 case '0':
 425                                         flags.zeropad = true;
 426                                         goto NEXT_FLAG;
 427                         }
 428                         break;
 429 NEXT_FLAG:
 430                         format++;
 431                 }
 432
 433                 /* Optional field width (may be '*') */
 434                 if (PGM_READ_CHAR(format) == '*')
 435                 {
 436                         field_width = va_arg(ap, int);
 437                         if (field_width < 0)
 438                         {
 439                                 field_width = -field_width;
 440                                 flags.left_adjust = true;
 441                         }
 442                         format++;
 443                 }
 444                 else
 445                 {
 446                         field_width = 0;
 447                         while (PGM_READ_CHAR(format) >= '0' && PGM_READ_CHAR(format) <= '9')
 448                                 field_width = field_width * 10 + (PGM_READ_CHAR(format++) - '0');
 449                 }
 450
 451                 if (flags.left_adjust)
 452                         flags.zeropad = false;
 453
 454                 /* Optional precision (or '*') */
 455                 if (PGM_READ_CHAR(format) == '.')
 456                 {
 457                         if (PGM_READ_CHAR(++format) == '*')
 458                         {
 459                                 precision = va_arg(ap, int);
 460                                 format++;
 461                         }
 462                         else
 463                         {
 464                                 precision = 0;
 465                                 while (PGM_READ_CHAR(format) >= '0' && PGM_READ_CHAR(format) <= '9')
 466                                         precision = precision * 10 + (PGM_READ_CHAR(format++) - '0');
 467                         }
 468                 }
 469                 else
 470                         precision = -1;
 471
 472                 /* At this point, "left_adjust" is nonzero if there was
 473                  * a sign, "zeropad" is 1 if there was a leading zero
 474                  * and 0 otherwise, "field_width" and "precision"
 475                  * contain numbers corresponding to the digit strings
 476                  * before and after the decimal point, respectively,
 477                  * and "plus_space_flag" is either 0 (no flag) or
 478                  * contains a plus or space character. If there was no
 479                  * decimal point, "precision" will be -1.
 480                  */
 481
 482                 flags.l_L_modifier = false;
 483                 flags.h_modifier = false;
 484
 485                 /* Optional 'l','L' r 'h' modifier? */
 486                 switch (PGM_READ_CHAR(format))
 487                 {
 488                         case 'l':
 489                         case 'L':
 490                                 flags.l_L_modifier = true;
 491                                 format++;
 492                                 break;
 493                         case 'h':
 494                                 flags.h_modifier = true;
 495                                 format++;
 496                                 break;
 497                 }
 498
 499                 /*
 500                  * At exit from the following switch, we will emit
 501                  * the characters starting at "buf_pointer" and
 502                  * ending at "ptr"-1
 503                  */
 504                 switch (format_flag = PGM_READ_CHAR(format++))
 505                 {
 506 #if CONFIG_PRINTF_N_FORMATTER
 507                         case 'n':
 508                                 if (sizeof(short) != sizeof(int))
 509                                 {
 510                                         if (sizeof(int) != sizeof(long))
 511                                         {
 512                                                 if (h_modifier)
 513                                                         *va_arg(ap, short *) = nr_of_chars;
 514                                                 else if (flags.l_L_modifier)
 515                                                         *va_arg(ap, long *) = nr_of_chars;
 516                                                 else
 517                                                         *va_arg(ap, int *) = nr_of_chars;
 518                                         }
 519                                         else
 520                                         {
 521                                                 if (h_modifier)
 522                                                         *va_arg(ap, short *) = nr_of_chars;
 523                                                 else
 524                                                         *va_arg(ap, int *) = nr_of_chars;
 525                                         }
 526                                 }
 527                                 else
 528                                 {
 529                                         if (flags.l_L_modifier)
 530                                                 *va_arg(ap, long *) = nr_of_chars;
 531                                         else
 532                                                 *va_arg(ap, int *) = nr_of_chars;
 533                                 }
 534                                 continue;
 535 #endif
 536                         case 'c':
 537                                 buf[0] = va_arg(ap, int);
 538                                 ptr++;
 539                                 break;
 540
 541                         case 's':
 542                                 if ( !(buf_pointer = va_arg(ap, char *)) )
 543                                         buf_pointer = null_pointer;
 544                                 if (precision < 0)
 545                                         precision = 10000;
 546                                 for (n=0; *buf_pointer++ && n < precision; n++)
 547                                         ;
 548                                 ptr = --buf_pointer;
 549                                 buf_pointer -= n;
 550                                 break;
 551
 552 #if CONFIG_PRINTF_OCTAL_FORMATTER
 553                         case 'o':
 554                                 if (flags.alternate_flag && !precision)
 555                                         precision++;
 556 #endif
 557                         case 'x':
 558                                 hex = "0123456789abcdef";
 559                         case 'u':
 560                         case 'p':
 561                         case 'X':
 562                                 if (format_flag == 'p')
 563 #if defined(__AVR__) || defined(__I196__) /* 16bit pointers */
 564                                         ulong = (unsigned long)(unsigned short)va_arg(ap, char *);
 565 #else /* 32bit pointers */
 566                                 ulong = (unsigned long)va_arg(ap, char *);
 567 #endif /* 32bit pointers */
 568                                 else if (sizeof(short) == sizeof(int))
 569                                         ulong = flags.l_L_modifier ?
 570                                                 va_arg(ap, unsigned long) : (unsigned long)va_arg(ap, unsigned int);
 571                                 else
 572                                         ulong = flags.h_modifier ?
 573                                                 (unsigned long)(unsigned short) va_arg(ap, int)
 574                                                 : (unsigned long)va_arg(ap, int);
 575                                 flags.div_factor =
 576 #if CONFIG_PRINTF_OCTAL_FORMATTER
 577                                         (format_flag == 'o') ? DIV_OCT :
 578 #endif
 579                                         (format_flag == 'u') ? DIV_DEC : DIV_HEX;
 580                                 flags.plus_space_flag = PSF_NONE;
 581                                 goto INTEGRAL_CONVERSION;
 582
 583                         case 'd':
 584                         case 'i':
 585                                 if (sizeof(short) == sizeof(long))
 586                                 {
 587                                         if ( (long)(ulong = va_arg(ap, unsigned long)) < 0)
 588                                         {
 589                                                 flags.plus_space_flag = PSF_MINUS;
 590                                                 ulong = (unsigned long)(-((signed long)ulong));
 591                                         }
 592                                 }
 593                                 else if (sizeof(short) == sizeof(int))
 594                                 {
 595                                         if ( (long)(ulong = flags.l_L_modifier ?
 596                                                                 va_arg(ap,unsigned long) : (unsigned long)va_arg(ap,int)) < 0)
 597                                         {
 598                                                 flags.plus_space_flag = PSF_MINUS;
 599                                                 ulong = (unsigned long)(-((signed long)ulong));
 600                                         }
 601                                 }
 602                                 else
 603                                 {
 604                                         if ( (signed long)(ulong = (unsigned long) (flags.h_modifier ?
 605                                                                         (short) va_arg(ap, int) : va_arg(ap,int))) < 0)
 606                                         {
 607                                                 flags.plus_space_flag = PSF_MINUS;
 608                                                 ulong = (unsigned long)(-((signed long)ulong));
 609                                         }
 610                                 }
 611                                 flags.div_factor = DIV_DEC;
 612
 613                                 /* Now convert to digits */
 614 INTEGRAL_CONVERSION:
 615                                 ptr = buf_pointer = &buf[FRMWRI_BUFSIZE - 1];
 616                                 flags.nonzero_value = (ulong != 0);
 617
 618                                 /* No char if zero and zero precision */
 619                                 if (precision != 0 || flags.nonzero_value)
 620                                 {
 621                                         switch (flags.div_factor)
 622                                         {
 623                                         case DIV_DEC:
 624                                                 do
 625                                                         *--buf_pointer = hex[ulong % 10];
 626                                                 while (ulong /= 10);
 627                                                 break;
 628
 629                                         case DIV_HEX:
 630                                                 do
 631                                                         *--buf_pointer = hex[ulong % 16];
 632                                                 while (ulong /= 16);
 633                                                 break;
 634 #if CONFIG_PRINTF_OCTAL_FORMATTER
 635                                         case DIV_OCT:
 636                                                 do
 637                                                         *--buf_pointer = hex[ulong % 8];
 638                                                 while (ulong /= 8);
 639                                                 break;
 640 #endif
 641                                         }
 642                                 }
 643
 644                                 /* "precision" takes precedence */
 645                                 if (precision < 0)
 646                                         if (flags.zeropad)
 647                                                 precision = field_width - (flags.plus_space_flag != PSF_NONE);
 648                                 while (precision > (int)(ptr - buf_pointer))
 649                                         *--buf_pointer = '0';
 650
 651                                 if (flags.alternate_flag && flags.nonzero_value)
 652                                 {
 653                                         if (format_flag == 'x' || format_flag == 'X')
 654                                         {
 655                                                 *--buf_pointer = format_flag;
 656                                                 *--buf_pointer = '0';
 657                                         }
 658 #if CONFIG_PRINTF_OCTAL_FORMATTER
 659                                         else if ((format_flag == 'o') && (*buf_pointer != '0'))
 660                                         {
 661                                                 *--buf_pointer = '0';
 662                                         }
 663 #endif
 664                                 }
 665                                 ASSERT(buf_pointer >= buf);
 666                                 break;
 667
 668 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 669                         case 'g':
 670                         case 'G':
 671                                 n = 1;
 672                                 format_flag -= 2;
 673                                 if (! precision)
 674                                 {
 675                                         precision = 1;
 676                                 }
 677                                 goto FLOATING_CONVERSION;
 678                         case 'f':
 679                                 format_flag = 0;
 680                         case 'e':
 681                         case 'E':
 682                                 n = 0;
 683 FLOATING_CONVERSION:
 684                                 if (precision < 0)
 685                                 {
 686                                         precision = 6;
 687                                 }
 688                                 if (sizeof(double) != sizeof(long double))
 689                                 {
 690                                         if ( (fvalue = flags.l_L_modifier ?
 691                                                                 va_arg(ap,long double) : va_arg(ap,double)) < 0)
 692                                         {
 693                                                 flags.plus_space_flag = PSF_MINUS;
 694                                                 fvalue = -fvalue;
 695                                         }
 696                                 }
 697                                 else if ( (fvalue = va_arg(ap,long double)) < 0)
 698                                 {
 699                                         flags.plus_space_flag = PSF_MINUS;
 700                                         fvalue = -fvalue;
 701                                 }
 702                                 ptr = float_conversion (fvalue,
 703                                                 (short)precision,
 704                                                 buf_pointer += field_width,
 705                                                 format_flag,
 706                                                 (char)n,
 707                                                 flags.alternate_flag);
 708                                 if (flags.zeropad)
 709                                 {
 710                                         precision = field_width - (flags.plus_space_flag != PSF_NONE);
 711                                         while (precision > ptr - buf_pointer)
 712                                                 *--buf_pointer = '0';
 713                                 }
 714                                 break;
 715
 716 #else /* CONFIG_PRINTF <= PRINTF_NOFLOAT */
 717                         case 'g':
 718                         case 'G':
 719                         case 'f':
 720                         case 'e':
 721                         case 'E':
 722                                 ptr = buf_pointer = bad_conversion;
 723                                 while (*ptr)
 724                                         ptr++;
 725                                 break;
 726 #endif /* CONFIG_PRINTF <= PRINTF_NOFLOAT */
 727
 728                         case '\0': /* Really bad place to find NUL in */
 729                                 format--;
 730
 731                         default:
 732                                 /* Undefined conversion! */
 733                                 ptr = buf_pointer = bad_conversion;
 734                                 ptr += 3;
 735                                 break;
 736
 737                 }
 738
 739                 /*
 740                  * This part emittes the formatted string to "put_one_char".
 741                  */
 742
 743                 /* If field_width == 0 then nothing should be written. */
 744                 precision = ptr - buf_pointer;
 745
 746                 if ( precision > field_width)
 747                 {
 748                         n = 0;
 749                 }
 750                 else
 751                 {
 752                         n = field_width - precision - (flags.plus_space_flag != PSF_NONE);
 753                 }
 754
 755                 /* emit any leading pad characters */
 756                 if (!flags.left_adjust)
 757                         while (--n >= 0)
 758                         {
 759                                 put_one_char(' ', secret_pointer);
 760 #if CONFIG_PRINTF_COUNT_CHARS
 761                                 nr_of_chars++;
 762 #endif
 763                         }
 764
 765                 /* emit flag characters (if any) */
 766                 if (flags.plus_space_flag)
 767                 {
 768                         put_one_char(flags.plus_space_flag == PSF_PLUS ? '+' : '-', secret_pointer);
 769 #if CONFIG_PRINTF_COUNT_CHARS
 770                         nr_of_chars++;
 771 #endif
 772                 }
 773
 774                 /* emit the string itself */
 775                 while (--precision >= 0)
 776                 {
 777                         put_one_char(*buf_pointer++, secret_pointer);
 778 #if CONFIG_PRINTF_COUNT_CHARS
 779                         nr_of_chars++;
 780 #endif
 781                 }
 782
 783                 /* emit trailing space characters */
 784                 if (flags.left_adjust)
 785                         while (--n >= 0)
 786                         {
 787                                 put_one_char(' ', secret_pointer);
 788 #if CONFIG_PRINTF_COUNT_CHARS
 789                                 nr_of_chars++;
 790 #endif
 791                         }
 792         }
 793
 794 #else /* PRINTF_REDUCED starts here */
 795
 796 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 797         char l_modifier, h_modifier;
 798         unsigned long u_val, div_val;
 799 #else
 800         unsigned int u_val, div_val;
 801 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 802
 803         char format_flag;
 804         unsigned int nr_of_chars, base;
 805         char outChar;
 806         char *ptr;
 807
 808         nr_of_chars = 0;
 809         for (;;)    /* Until full format string read */
 810         {
 811                 while ((format_flag = PGM_READ_CHAR(format++)) != '%')    /* Until '%' or '\0' */
 812                 {
 813                         if (!format_flag)
 814                                 return (nr_of_chars);
 815                         put_one_char(format_flag, secret_pointer);
 816                         nr_of_chars++;
 817                 }
 818
 819 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 820                 /*=================================*/
 821                 /* Optional 'l' or 'h' modifiers ? */
 822                 /*=================================*/
 823                 l_modifier = h_modifier = 0;
 824                 switch (PGM_READ_CHAR(format))
 825                 {
 826                         case 'l':
 827                                 l_modifier = 1;
 828                                 format++;
 829                                 break;
 830
 831                         case 'h':
 832                                 h_modifier = 1;
 833                                 format++;
 834                                 break;
 835                 }
 836 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 837
 838                 switch (format_flag = PGM_READ_CHAR(format++))
 839                 {
 840                         case 'c':
 841                                 format_flag = va_arg(ap, int);
 842                         default:
 843                                 put_one_char(format_flag, secret_pointer);
 844                                 nr_of_chars++;
 845                                 continue;
 846
 847                         case 's':
 848                                 ptr = va_arg(ap, char *);
 849                                 while ((format_flag = *ptr++))
 850                                 {
 851                                         put_one_char(format_flag, secret_pointer);
 852                                         nr_of_chars++;
 853                                 }
 854                                 continue;
 855
 856                         case 'o':
 857                                 base = 8;
 858                                 if (IS_SHORT)
 859                                         div_val = 0x8000;
 860                                 else
 861                                         div_val = 0x40000000;
 862                                 goto CONVERSION_LOOP;
 863
 864                         case 'd':
 865                                 base = 10;
 866                                 if (IS_SHORT)
 867                                         div_val = 10000;
 868                                 else
 869                                         div_val = 1000000000;
 870                                 goto CONVERSION_LOOP;
 871
 872                         case 'X':
 873                         case 'x':
 874                                 base = 16;
 875                                 if (IS_SHORT)
 876                                         div_val = 0x1000;
 877                                 else
 878                                         div_val = 0x10000000;
 879
 880 CONVERSION_LOOP:
 881 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 882                                 if (h_modifier)
 883                                         u_val = (format_flag == 'd') ?
 884                                                 (short)va_arg(ap, int) : (unsigned short)va_arg(ap, int);
 885                                 else if (l_modifier)
 886                                         u_val = va_arg(ap, long);
 887                                 else
 888                                         u_val = (format_flag == 'd') ?
 889                                                 va_arg(ap,int) : va_arg(ap,unsigned int);
 890 #else /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 891                                 u_val = va_arg(ap,int);
 892 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 893                                 if (format_flag == 'd')
 894                                 {
 895                                         if (((int)u_val) < 0)
 896                                         {
 897                                                 u_val = - u_val;
 898                                                 put_one_char('-', secret_pointer);
 899                                                 nr_of_chars++;
 900                                         }
 901                                 }
 902                                 while (div_val > 1 && div_val > u_val)
 903                                 {
 904                                         div_val /= base;
 905                                 }
 906                                 do
 907                                 {
 908                                         outChar = (u_val / div_val) + '0';
 909                                         if (outChar > '9')
 910                                         {
 911                                                 if (format_flag == 'x')
 912                                                         outChar += 'a'-'9'-1;
 913                                                 else
 914                                                         outChar += 'A'-'9'-1;
 915                                         }
 916                                         put_one_char(outChar, secret_pointer);
 917                                         nr_of_chars++;
 918                                         u_val %= div_val;
 919                                         div_val /= base;
 920                                 }
 921                                 while (div_val);
 922
 923                 } /* end switch(format_flag...) */
 924         }
 925 #endif /* CONFIG_PRINTF > PRINTF_REDUCED */
 926 }
 927
 928 #endif /* CONFIG_PRINTF */