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 1.11  2005/02/16 16:51:29  bernie
  57  *#* Simplify float code.
  58  *#*
  59  *#* Revision 1.10  2004/10/26 09:01:35  bernie
  60  *#* Fix spacing.
  61  *#*
  62  *#* Revision 1.9  2004/09/14 21:06:23  bernie
  63  *#* Spelling fix.
  64  *#*
  65  *#* Revision 1.8  2004/08/25 14:12:09  rasky
  66  *#* Aggiornato il comment block dei log RCS
  67  *#*
  68  *#* Revision 1.7  2004/08/04 15:53:47  rasky
  69  *#* Nuove opzioni di configurazione per formatted_write e ridotto maggiormente l'utilizzo dellos tack
  70  *#*
  71  *#* Revision 1.6  2004/07/30 14:34:10  rasky
  72  *#* Vari fix per documentazione e commenti
  73  *#* Aggiunte PP_CATn e STATIC_ASSERT
  74  *#*
  75  *#* Revision 1.5  2004/07/29 22:57:09  bernie
  76  *#* Switch to new-style config handling.
  77  *#*
  78  *#* Revision 1.4  2004/07/21 00:20:20  bernie
  79  *#* Allow completely disabling printf()-like formatter.
  80  *#*
  81  *#* Revision 1.3  2004/07/18 22:00:15  bernie
  82  *#* Reorganize configuration parameters to match DevLib's convention.
  83  *#*
  84  *#* Revision 1.2  2004/06/03 11:27:09  bernie
  85  *#* Add dual-license information.
  86  *#*
  87  *#* Revision 1.1  2004/05/23 15:43:16  bernie
  88  *#* Import mware modules.
  89  *#*
  90  *#*/
  91
  92 #include "formatwr.h"
  93 #include <compiler.h> /* progmem macros */
  94 #include <config.h> /* CONFIG_ macros */
  95 #include <debug.h> /* ASSERT */
  96
  97 #ifndef CONFIG_PRINTF_N_FORMATTER
  98         /*! Disable the arcane %n formatter. */
  99         #define CONFIG_PRINTF_N_FORMATTER 0
 100 #endif
 101
 102 #ifndef CONFIG_PRINTF_OCTAL_FORMATTER
 103         /*! Disable the %o formatter. */
 104         #define CONFIG_PRINTF_OCTAL_FORMATTER 0
 105 #endif
 106
 107 /* True if we must keep a count of the number of characters we print. */
 108 #define CONFIG_PRINTF_COUNT_CHARS (CONFIG_PRINTF_RETURN_COUNT || CONFIG_PRINTF_N_FORMATTER)
 109
 110 #if CONFIG_PRINTF
 111
 112 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 113 #include <float.h>
 114 #endif /* CONFIG_PRINTF > PRINTF_NOFLOAT */
 115
 116 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 117 /*bernie: save some memory, who cares about floats with lots of decimals? */
 118         #define FRMWRI_BUFSIZE 134
 119         #warning 134 is too much, the code must be fixed to have a lower precision limit
 120 #else
 121         /*
 122          * Conservative estimate. Should be (probably) 12 (which is the size necessary
 123          * to represent (2^32-1) in octal plus the sign bit.
 124          */
 125         #define FRMWRI_BUFSIZE 16
 126 #endif
 127
 128 /* Probably useful for fancy microcontrollers such as the PIC, nobody knows. */
 129 #ifndef MEM_ATTRIBUTE
 130 #define MEM_ATTRIBUTE
 131 #endif
 132
 133 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 134         #define IS_SHORT (h_modifier || (sizeof(int) == 2 && !l_modifier))
 135 #else
 136         #define IS_SHORT (sizeof(int) == 2)
 137 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 138
 139
 140 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 141
 142 static char *float_conversion(MEM_ATTRIBUTE long double value,
 143                 MEM_ATTRIBUTE short nr_of_digits,
 144                 MEM_ATTRIBUTE char *buf,
 145                 MEM_ATTRIBUTE char format_flag,
 146                 MEM_ATTRIBUTE char g_flag,
 147                 MEM_ATTRIBUTE bool alternate_flag)
 148 {
 149         MEM_ATTRIBUTE char *cp;
 150         MEM_ATTRIBUTE char *buf_pointer;
 151         MEM_ATTRIBUTE short n, i, dec_point_pos, integral_10_log;
 152
 153         buf_pointer = buf;
 154         integral_10_log = 0;
 155
 156         if (value >= 1)
 157         {
 158                 while (value >= 1e11) /* To speed up things a bit */
 159                 {
 160                         value /= 1e10;
 161                         integral_10_log += 10;
 162                 }
 163                 while (value >= 10)
 164                 {
 165                         value /= 10;
 166                         integral_10_log++;
 167                 }
 168         }
 169         else if (value) /* Not just 0.0 */
 170         {
 171                 while (value <= 1e-10) /* To speed up things a bit */
 172                 {
 173                         value *= 1e10;
 174                         integral_10_log -= 10;
 175                 }
 176                 while (value < 1)
 177                 {
 178                         value *= 10;
 179                         integral_10_log--;
 180                 }
 181         }
 182         if (g_flag)
 183         {
 184                 if (integral_10_log < nr_of_digits && integral_10_log >= -4)
 185                 {
 186                         format_flag = 0;
 187                         nr_of_digits -= integral_10_log;
 188                 }
 189                 nr_of_digits--;
 190                 if (alternate_flag)
 191                         /* %#G - No removal of trailing zeros */
 192                         g_flag = 0;
 193                 else
 194                         /* %G - Removal of trailing zeros */
 195                         alternate_flag = true;
 196         }
 197
 198         /* %e or %E */
 199         if (format_flag)
 200         {
 201                 dec_point_pos = 0;
 202         }
 203         else
 204         {
 205                 /* Less than one... */
 206                 if (integral_10_log < 0)
 207                 {
 208                         *buf_pointer++ = '0';
 209                         if ((n = nr_of_digits) || alternate_flag)
 210                                 *buf_pointer++ = '.';
 211                         i = 0;
 212                         while (--i > integral_10_log && nr_of_digits)
 213                         {
 214                                 *buf_pointer++ = '0';
 215                                 nr_of_digits--;
 216                         }
 217                         if (integral_10_log < (-n - 1))
 218                                 /* Nothing more to do */
 219                                 goto CLEAN_UP;
 220                         dec_point_pos = 1;
 221                 }
 222                 else
 223                 {
 224                         dec_point_pos = - integral_10_log;
 225                 }
 226         }
 227
 228         i = dec_point_pos;
 229         while (i <= nr_of_digits )
 230         {
 231                 value -= (long double)(n = (short)value); /* n=Digit value=Remainder */
 232                 value *= 10; /* Prepare for next shot */
 233                 *buf_pointer++ = n + '0';
 234                 if ( ! i++ && (nr_of_digits || alternate_flag))
 235                         *buf_pointer++ = '.';
 236         }
 237
 238         /* Rounding possible */
 239         if (value >= 5)
 240         {
 241                 n = 1; /* Carry */
 242                 cp = buf_pointer - 1;
 243                 do
 244                 {
 245                         if (*cp != '.')
 246                         {
 247                                 if ( (*cp += n) == ('9' + 1) )
 248                                 {
 249                                         *cp = '0';
 250                                         n = 1;
 251                                 }
 252                                 else
 253                                         n = 0;
 254                         }
 255                 } while (cp-- > buf);
 256                 if (n)
 257                 {
 258                         /* %e or %E */
 259                         if (format_flag)
 260                         {
 261                                 cp = buf_pointer;
 262                                 while (cp > buf)
 263                                 {
 264                                         if (*(cp - 1) == '.')
 265                                         {
 266                                                 *cp = *(cp - 2);
 267                                                 cp--;
 268                                         }
 269                                         else
 270                                                 *cp = *(cp - 1);
 271                                         cp--;
 272                                 }
 273                                 integral_10_log++;
 274                         }
 275                         else
 276                         {
 277                                 cp = ++buf_pointer;
 278                                 while (cp > buf)
 279                                 {
 280                                         *cp = *(cp - 1);
 281                                         cp--;
 282                                 }
 283                         }
 284                         *buf = '1';
 285                 }
 286         }
 287
 288 CLEAN_UP:
 289         /* %G - Remove trailing zeros */
 290         if (g_flag)
 291         {
 292                 while (*(buf_pointer - 1) == '0')
 293                         buf_pointer--;
 294                 if (*(buf_pointer - 1) == '.')
 295                         buf_pointer--;
 296         }
 297
 298         /* %e or %E */
 299         if (format_flag)
 300         {
 301                 *buf_pointer++ = format_flag;
 302                 if (integral_10_log < 0)
 303                 {
 304                         *buf_pointer++ = '-';
 305                         integral_10_log = -integral_10_log;
 306                 }
 307                 else
 308                         *buf_pointer++ = '+';
 309                 n = 0;
 310                 buf_pointer +=10;
 311                 do
 312                 {
 313                         n++;
 314                         *buf_pointer++ = (integral_10_log % 10) + '0';
 315                         integral_10_log /= 10;
 316                 } while ( integral_10_log || n < 2 );
 317                 for ( i = n ; n > 0 ; n-- )
 318                         *(buf_pointer - 11 - i + n) = *(buf_pointer - n);
 319                 buf_pointer -= 10;
 320         }
 321         return (buf_pointer);
 322 }
 323
 324 #endif /* CONFIG_PRINTF > PRINTF_NOFLOAT */
 325
 326 /*!
 327  * This routine forms the core and entry of the formatter.
 328  *
 329  * The conversion performed conforms to the ANSI specification for "printf".
 330  */
 331 int
 332 PGM_FUNC(_formatted_write)(const char * PGM_ATTR format,
 333                 void put_one_char(char, void *),
 334                 void *secret_pointer,
 335                 va_list ap)
 336 {
 337 #if CONFIG_PRINTF > PRINTF_REDUCED
 338         MEM_ATTRIBUTE static char bad_conversion[] = "???";
 339         MEM_ATTRIBUTE static char null_pointer[] = "<NULL>";
 340
 341         MEM_ATTRIBUTE int precision;
 342         MEM_ATTRIBUTE int n;
 343 #if CONFIG_PRINTF_COUNT_CHARS
 344         MEM_ATTRIBUTE int nr_of_chars;
 345 #endif
 346         MEM_ATTRIBUTE int field_width;
 347         MEM_ATTRIBUTE char format_flag;
 348         enum PLUS_SPACE_FLAGS {
 349                 PSF_NONE, PSF_PLUS, PSF_MINUS
 350         };
 351         enum DIV_FACTOR {
 352                 DIV_DEC, DIV_HEX,
 353 #if CONFIG_PRINTF_OCTAL_FORMATTER
 354                 DIV_OCT,
 355 #endif
 356         };
 357         struct {
 358                 MEM_ATTRIBUTE enum PLUS_SPACE_FLAGS plus_space_flag : 2;
 359 #if CONFIG_PRINTF_OCTAL_FORMATTER
 360                 MEM_ATTRIBUTE enum DIV_FACTOR div_factor : 2;
 361 #else
 362                 MEM_ATTRIBUTE enum DIV_FACTOR div_factor : 1;
 363 #endif
 364                 MEM_ATTRIBUTE bool left_adjust : 1;
 365                 MEM_ATTRIBUTE bool l_L_modifier : 1;
 366                 MEM_ATTRIBUTE bool h_modifier : 1;
 367                 MEM_ATTRIBUTE bool alternate_flag : 1;
 368                 MEM_ATTRIBUTE bool nonzero_value : 1;
 369                 MEM_ATTRIBUTE bool zeropad : 1;
 370         } flags;
 371         MEM_ATTRIBUTE unsigned long ulong;
 372
 373 #if CONFIG_PRINTF >  PRINTF_NOFLOAT
 374         MEM_ATTRIBUTE long double fvalue;
 375 #endif
 376
 377         MEM_ATTRIBUTE char *buf_pointer;
 378         MEM_ATTRIBUTE char *ptr;
 379         MEM_ATTRIBUTE const char *hex;
 380         MEM_ATTRIBUTE char buf[FRMWRI_BUFSIZE];
 381
 382 #if CONFIG_PRINTF_COUNT_CHARS
 383         nr_of_chars = 0;
 384 #endif
 385         for (;;)    /* Until full format string read */
 386         {
 387                 while ((format_flag = PGM_READ_CHAR(format++)) != '%')    /* Until '%' or '\0' */
 388                 {
 389                         if (!format_flag)
 390 #if CONFIG_PRINTF_RETURN_COUNT
 391                                 return (nr_of_chars);
 392 #else
 393                                 return 0;
 394 #endif
 395                         put_one_char(format_flag, secret_pointer);
 396 #if CONFIG_PRINTF_COUNT_CHARS
 397                         nr_of_chars++;
 398 #endif
 399                 }
 400                 if (PGM_READ_CHAR(format) == '%')    /* %% prints as % */
 401                 {
 402                         format++;
 403                         put_one_char('%', secret_pointer);
 404 #if CONFIG_PRINTF_COUNT_CHARS
 405                         nr_of_chars++;
 406 #endif
 407                         continue;
 408                 }
 409
 410                 flags.left_adjust = false;
 411                 flags.alternate_flag = false;
 412                 flags.plus_space_flag = PSF_NONE;
 413                 flags.zeropad = false;
 414                 ptr = buf_pointer = &buf[0];
 415                 hex = "0123456789ABCDEF";
 416
 417                 /* check for leading '-', '+', ' ','#' or '0' flags  */
 418                 for (;;)
 419                 {
 420                         switch (PGM_READ_CHAR(format))
 421                         {
 422                                 case ' ':
 423                                         if (flags.plus_space_flag)
 424                                                 goto NEXT_FLAG;
 425                                 case '+':
 426                                         flags.plus_space_flag = PSF_PLUS;
 427                                         goto NEXT_FLAG;
 428                                 case '-':
 429                                         flags.left_adjust = true;
 430                                         goto NEXT_FLAG;
 431                                 case '#':
 432                                         flags.alternate_flag = true;
 433                                         goto NEXT_FLAG;
 434                                 case '0':
 435                                         flags.zeropad = true;
 436                                         goto NEXT_FLAG;
 437                         }
 438                         break;
 439 NEXT_FLAG:
 440                         format++;
 441                 }
 442
 443                 /* Optional field width (may be '*') */
 444                 if (PGM_READ_CHAR(format) == '*')
 445                 {
 446                         field_width = va_arg(ap, int);
 447                         if (field_width < 0)
 448                         {
 449                                 field_width = -field_width;
 450                                 flags.left_adjust = true;
 451                         }
 452                         format++;
 453                 }
 454                 else
 455                 {
 456                         field_width = 0;
 457                         while (PGM_READ_CHAR(format) >= '0' && PGM_READ_CHAR(format) <= '9')
 458                                 field_width = field_width * 10 + (PGM_READ_CHAR(format++) - '0');
 459                 }
 460
 461                 if (flags.left_adjust)
 462                         flags.zeropad = false;
 463
 464                 /* Optional precision (or '*') */
 465                 if (PGM_READ_CHAR(format) == '.')
 466                 {
 467                         if (PGM_READ_CHAR(++format) == '*')
 468                         {
 469                                 precision = va_arg(ap, int);
 470                                 format++;
 471                         }
 472                         else
 473                         {
 474                                 precision = 0;
 475                                 while (PGM_READ_CHAR(format) >= '0' && PGM_READ_CHAR(format) <= '9')
 476                                         precision = precision * 10 + (PGM_READ_CHAR(format++) - '0');
 477                         }
 478                 }
 479                 else
 480                         precision = -1;
 481
 482                 /* At this point, "left_adjust" is nonzero if there was
 483                  * a sign, "zeropad" is 1 if there was a leading zero
 484                  * and 0 otherwise, "field_width" and "precision"
 485                  * contain numbers corresponding to the digit strings
 486                  * before and after the decimal point, respectively,
 487                  * and "plus_space_flag" is either 0 (no flag) or
 488                  * contains a plus or space character. If there was no
 489                  * decimal point, "precision" will be -1.
 490                  */
 491
 492                 flags.l_L_modifier = false;
 493                 flags.h_modifier = false;
 494
 495                 /* Optional 'l','L' r 'h' modifier? */
 496                 switch (PGM_READ_CHAR(format))
 497                 {
 498                         case 'l':
 499                         case 'L':
 500                                 flags.l_L_modifier = true;
 501                                 format++;
 502                                 break;
 503                         case 'h':
 504                                 flags.h_modifier = true;
 505                                 format++;
 506                                 break;
 507                 }
 508
 509                 /*
 510                  * At exit from the following switch, we will emit
 511                  * the characters starting at "buf_pointer" and
 512                  * ending at "ptr"-1
 513                  */
 514                 switch (format_flag = PGM_READ_CHAR(format++))
 515                 {
 516 #if CONFIG_PRINTF_N_FORMATTER
 517                         case 'n':
 518                                 if (sizeof(short) != sizeof(int))
 519                                 {
 520                                         if (sizeof(int) != sizeof(long))
 521                                         {
 522                                                 if (h_modifier)
 523                                                         *va_arg(ap, short *) = nr_of_chars;
 524                                                 else if (flags.l_L_modifier)
 525                                                         *va_arg(ap, long *) = nr_of_chars;
 526                                                 else
 527                                                         *va_arg(ap, int *) = nr_of_chars;
 528                                         }
 529                                         else
 530                                         {
 531                                                 if (h_modifier)
 532                                                         *va_arg(ap, short *) = nr_of_chars;
 533                                                 else
 534                                                         *va_arg(ap, int *) = nr_of_chars;
 535                                         }
 536                                 }
 537                                 else
 538                                 {
 539                                         if (flags.l_L_modifier)
 540                                                 *va_arg(ap, long *) = nr_of_chars;
 541                                         else
 542                                                 *va_arg(ap, int *) = nr_of_chars;
 543                                 }
 544                                 continue;
 545 #endif
 546                         case 'c':
 547                                 buf[0] = va_arg(ap, int);
 548                                 ptr++;
 549                                 break;
 550
 551                         case 's':
 552                                 if ( !(buf_pointer = va_arg(ap, char *)) )
 553                                         buf_pointer = null_pointer;
 554                                 if (precision < 0)
 555                                         precision = 10000;
 556                                 for (n=0; *buf_pointer++ && n < precision; n++)
 557                                         ;
 558                                 ptr = --buf_pointer;
 559                                 buf_pointer -= n;
 560                                 break;
 561
 562 #if CONFIG_PRINTF_OCTAL_FORMATTER
 563                         case 'o':
 564                                 if (flags.alternate_flag && !precision)
 565                                         precision++;
 566 #endif
 567                         case 'x':
 568                                 hex = "0123456789abcdef";
 569                         case 'u':
 570                         case 'p':
 571                         case 'X':
 572                                 if (format_flag == 'p')
 573 #if defined(__AVR__) || defined(__I196__) /* 16bit pointers */
 574                                         ulong = (unsigned long)(unsigned short)va_arg(ap, char *);
 575 #else /* 32bit pointers */
 576                                 ulong = (unsigned long)va_arg(ap, char *);
 577 #endif /* 32bit pointers */
 578                                 else if (sizeof(short) == sizeof(int))
 579                                         ulong = flags.l_L_modifier ?
 580                                                 va_arg(ap, unsigned long) : (unsigned long)va_arg(ap, unsigned int);
 581                                 else
 582                                         ulong = flags.h_modifier ?
 583                                                 (unsigned long)(unsigned short) va_arg(ap, int)
 584                                                 : (unsigned long)va_arg(ap, int);
 585                                 flags.div_factor =
 586 #if CONFIG_PRINTF_OCTAL_FORMATTER
 587                                         (format_flag == 'o') ? DIV_OCT :
 588 #endif
 589                                         (format_flag == 'u') ? DIV_DEC : DIV_HEX;
 590                                 flags.plus_space_flag = PSF_NONE;
 591                                 goto INTEGRAL_CONVERSION;
 592
 593                         case 'd':
 594                         case 'i':
 595                                 if (sizeof(short) == sizeof(long))
 596                                 {
 597                                         if ( (long)(ulong = va_arg(ap, unsigned long)) < 0)
 598                                         {
 599                                                 flags.plus_space_flag = PSF_MINUS;
 600                                                 ulong = (unsigned long)(-((signed long)ulong));
 601                                         }
 602                                 }
 603                                 else if (sizeof(short) == sizeof(int))
 604                                 {
 605                                         if ( (long)(ulong = flags.l_L_modifier ?
 606                                                                 va_arg(ap,unsigned long) : (unsigned long)va_arg(ap,int)) < 0)
 607                                         {
 608                                                 flags.plus_space_flag = PSF_MINUS;
 609                                                 ulong = (unsigned long)(-((signed long)ulong));
 610                                         }
 611                                 }
 612                                 else
 613                                 {
 614                                         if ( (signed long)(ulong = (unsigned long) (flags.h_modifier ?
 615                                                                         (short) va_arg(ap, int) : va_arg(ap,int))) < 0)
 616                                         {
 617                                                 flags.plus_space_flag = PSF_MINUS;
 618                                                 ulong = (unsigned long)(-((signed long)ulong));
 619                                         }
 620                                 }
 621                                 flags.div_factor = DIV_DEC;
 622
 623                                 /* Now convert to digits */
 624 INTEGRAL_CONVERSION:
 625                                 ptr = buf_pointer = &buf[FRMWRI_BUFSIZE - 1];
 626                                 flags.nonzero_value = (ulong != 0);
 627
 628                                 /* No char if zero and zero precision */
 629                                 if (precision != 0 || flags.nonzero_value)
 630                                 {
 631                                         switch (flags.div_factor)
 632                                         {
 633                                         case DIV_DEC:
 634                                                 do
 635                                                         *--buf_pointer = hex[ulong % 10];
 636                                                 while (ulong /= 10);
 637                                                 break;
 638
 639                                         case DIV_HEX:
 640                                                 do
 641                                                         *--buf_pointer = hex[ulong % 16];
 642                                                 while (ulong /= 16);
 643                                                 break;
 644 #if CONFIG_PRINTF_OCTAL_FORMATTER
 645                                         case DIV_OCT:
 646                                                 do
 647                                                         *--buf_pointer = hex[ulong % 8];
 648                                                 while (ulong /= 8);
 649                                                 break;
 650 #endif
 651                                         }
 652                                 }
 653
 654                                 /* "precision" takes precedence */
 655                                 if (precision < 0)
 656                                         if (flags.zeropad)
 657                                                 precision = field_width - (flags.plus_space_flag != PSF_NONE);
 658                                 while (precision > (int)(ptr - buf_pointer))
 659                                         *--buf_pointer = '0';
 660
 661                                 if (flags.alternate_flag && flags.nonzero_value)
 662                                 {
 663                                         if (format_flag == 'x' || format_flag == 'X')
 664                                         {
 665                                                 *--buf_pointer = format_flag;
 666                                                 *--buf_pointer = '0';
 667                                         }
 668 #if CONFIG_PRINTF_OCTAL_FORMATTER
 669                                         else if ((format_flag == 'o') && (*buf_pointer != '0'))
 670                                         {
 671                                                 *--buf_pointer = '0';
 672                                         }
 673 #endif
 674                                 }
 675                                 ASSERT(buf_pointer >= buf);
 676                                 break;
 677
 678 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 679                         case 'g':
 680                         case 'G':
 681                                 n = 1;
 682                                 format_flag -= 2;
 683                                 if (! precision)
 684                                 {
 685                                         precision = 1;
 686                                 }
 687                                 goto FLOATING_CONVERSION;
 688                         case 'f':
 689                                 format_flag = 0;
 690                         case 'e':
 691                         case 'E':
 692                                 n = 0;
 693 FLOATING_CONVERSION:
 694                                 if (precision < 0)
 695                                 {
 696                                         precision = 6;
 697                                 }
 698
 699                                 if (sizeof(double) != sizeof(long double))
 700                                 {
 701                                         fvalue = flags.l_L_modifier ?
 702                                                 va_arg(ap,long double) : va_arg(ap,double);
 703                                 }
 704                                 else
 705                                         fvalue = va_arg(ap,long double);
 706
 707                                 if (fvalue < 0)
 708                                 {
 709                                         flags.plus_space_flag = PSF_MINUS;
 710                                         fvalue = -fvalue;
 711                                 }
 712                                 ptr = float_conversion (fvalue,
 713                                                 (short)precision,
 714                                                 buf_pointer += field_width,
 715                                                 format_flag,
 716                                                 (char)n,
 717                                                 flags.alternate_flag);
 718                                 if (flags.zeropad)
 719                                 {
 720                                         precision = field_width - (flags.plus_space_flag != PSF_NONE);
 721                                         while (precision > ptr - buf_pointer)
 722                                                 *--buf_pointer = '0';
 723                                 }
 724                                 break;
 725
 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 += strlen(bad_conversion);
 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 */