bertos/mware/formatwr.c

   1 /**
   2  * \file
   3  * <!--
   4  * This file is part of BeRTOS.
   5  *
   6  * Bertos is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  * As a special exception, you may use this file as part of a free software
  21  * library without restriction.  Specifically, if other files instantiate
  22  * templates or use macros or inline functions from this file, or you compile
  23  * this file and link it with other files to produce an executable, this
  24  * file does not by itself cause the resulting executable to be covered by
  25  * the GNU General Public License.  This exception does not however
  26  * invalidate any other reasons why the executable file might be covered by
  27  * the GNU General Public License.
  28  *
  29  * Copyright 2003, 2004, 2005, 2008 Develer S.r.l. (http://www.develer.com/)
  30  *
  31  * -->
  32  *
  33  * \version $Id$
  34  *
  35  * \brief Basic "printf", "sprintf" and "fprintf" formatter.
  36  *
  37  * This module is 100% reentrant and can be adapted to user-defined routines
  38  * that needs formatters with special properties like different output
  39  * channels or new format specifiers.
  40  *
  41  * To reduce size in applications not using real numbers or long integers
  42  * the formatter may be compiled to exclude certain parts.  This is
  43  * controlled by giving a -D option a compilation time:
  44  *
  45  * \code
  46  *  -D CONFIG_PRINTF=PRINTF_FULL         Full ANSI printf formatter, with some C99 extensions
  47  *  -D CONFIG_PRINTF=PRINTF_NOFLOAT      Exclude support for floats
  48  *  -D CONFIG_PRINTF=PRINTF_REDUCED      Simplified formatter (see below)
  49  *  -D CONFIG_PRINTF=PRINTF_NOMODIFIERS  Exclude 'l', 'z' and 'h' modifiers in reduced version
  50  *  -D CONFIG_PRINTF=PRINTF_DISABLED     No formatter at all
  51  * \endcode
  52  *
  53  * Code size on AVR4 with GCC 3.4.1 (-O2):
  54  * \li  PRINTF_FULL        2912byte (0xB60)
  55  * \li  PRINTF_NOFLOAT     1684byte (0x694)
  56  * \li  PRINTF_REDUCED      924byte (0x39C)
  57  * \li  PRINTF_NOMODIFIERS  416byte (0x1A0)
  58  *
  59  * Code/data size in words on DSP56K with CodeWarrior 6.0:
  60  * \li  PRINTF_FULL         1493/45
  61  * \li  PRINTF_NOFLOAT      795/45
  62  * \li  PRINTF_REDUCED      482/0
  63  * \li  PRINTF_NOMODIFIERS  301/0
  64  *
  65  * The reduced version of formatter is suitable when program size is critical
  66  * rather than formatting power.  This routine uses less than 20 bytes of
  67  * stack space which makes it practical even in systems with less than 256
  68  * bytes of user RAM.
  69  *
  70  * The only formatting specifiers supported by the reduced formatter are:
  71  * \code
  72  *    %% %c %s %d %o %x %X and %hd %ho %hx %hX %ld %lo %lx %lX
  73  * \endcode
  74  *
  75  * It means that real variables are not supported as well as field
  76  * width and precision arguments.
  77  */
  78
  79
  80 #include "formatwr.h"
  81
  82 #include "cfg/cfg_formatwr.h"  /* CONFIG_ macros */
  83 #include <cfg/debug.h>         /* ASSERT */
  84
  85 #include <cpu/pgm.h>
  86 #include <mware/hex.h>
  87
  88 #ifndef CONFIG_PRINTF_N_FORMATTER
  89         /** Disable the arcane %n formatter. */
  90         #define CONFIG_PRINTF_N_FORMATTER 0
  91 #endif
  92
  93 #ifndef CONFIG_PRINTF_OCTAL_FORMATTER
  94         /** Disable the %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
 106         /* Maximum precision for floating point values */
 107         typedef long double max_float_t;
 108
 109         /*bernie: save some memory, who cares about floats with lots of decimals? */
 110         #define FRMWRI_BUFSIZE 134
 111         #if !(ARCH & ARCH_NIGHTTEST)
 112                 #warning 134 is too much, the code must be fixed to have a lower precision limit
 113         #endif
 114 #else
 115         /*
 116          * Conservative estimate. Should be (probably) 12 (which is the size necessary
 117          * to represent (2^32-1) in octal plus the sign bit.
 118          */
 119         #define FRMWRI_BUFSIZE 16
 120 #endif
 121
 122 /* Probably useful for fancy microcontrollers such as the PIC, nobody knows. */
 123 #ifndef MEM_ATTRIBUTE
 124 #define MEM_ATTRIBUTE
 125 #endif
 126
 127 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 128         #define IS_SHORT (h_modifier || (sizeof(int) == 2 && !l_modifier))
 129 #else
 130         #define IS_SHORT (sizeof(int) == 2)
 131 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 132
 133
 134 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 135
 136 static char *float_conversion(MEM_ATTRIBUTE max_float_t value,
 137                 MEM_ATTRIBUTE short nr_of_digits,
 138                 MEM_ATTRIBUTE char *buf,
 139                 MEM_ATTRIBUTE char format_flag,
 140                 MEM_ATTRIBUTE char g_flag,
 141                 MEM_ATTRIBUTE bool alternate_flag)
 142 {
 143         MEM_ATTRIBUTE char *cp;
 144         MEM_ATTRIBUTE char *buf_pointer;
 145         MEM_ATTRIBUTE short n, i, dec_point_pos, integral_10_log;
 146
 147         buf_pointer = buf;
 148         integral_10_log = 0;
 149
 150         if (value >= 1)
 151         {
 152                 while (value >= 1e11) /* To speed up things a bit */
 153                 {
 154                         value /= 1e10;
 155                         integral_10_log += 10;
 156                 }
 157                 while (value >= 10)
 158                 {
 159                         value /= 10;
 160                         integral_10_log++;
 161                 }
 162         }
 163         else if (value) /* Not just 0.0 */
 164         {
 165                 while (value <= 1e-10) /* To speed up things a bit */
 166                 {
 167                         value *= 1e10;
 168                         integral_10_log -= 10;
 169                 }
 170                 while (value < 1)
 171                 {
 172                         value *= 10;
 173                         integral_10_log--;
 174                 }
 175         }
 176         if (g_flag)
 177         {
 178                 if (integral_10_log < nr_of_digits && integral_10_log >= -4)
 179                 {
 180                         format_flag = 0;
 181                         nr_of_digits -= integral_10_log;
 182                 }
 183                 nr_of_digits--;
 184                 if (alternate_flag)
 185                         /* %#G - No removal of trailing zeros */
 186                         g_flag = 0;
 187                 else
 188                         /* %G - Removal of trailing zeros */
 189                         alternate_flag = true;
 190         }
 191
 192         /* %e or %E */
 193         if (format_flag)
 194         {
 195                 dec_point_pos = 0;
 196         }
 197         else
 198         {
 199                 /* Less than one... */
 200                 if (integral_10_log < 0)
 201                 {
 202                         *buf_pointer++ = '0';
 203                         if ((n = nr_of_digits) || alternate_flag)
 204                                 *buf_pointer++ = '.';
 205                         i = 0;
 206                         while (--i > integral_10_log && nr_of_digits)
 207                         {
 208                                 *buf_pointer++ = '0';
 209                                 nr_of_digits--;
 210                         }
 211                         if (integral_10_log < (-n - 1))
 212                                 /* Nothing more to do */
 213                                 goto CLEAN_UP;
 214                         dec_point_pos = 1;
 215                 }
 216                 else
 217                 {
 218                         dec_point_pos = - integral_10_log;
 219                 }
 220         }
 221
 222         i = dec_point_pos;
 223         while (i <= nr_of_digits )
 224         {
 225                 value -= (max_float_t)(n = (short)value); /* n=Digit value=Remainder */
 226                 value *= 10; /* Prepare for next shot */
 227                 *buf_pointer++ = n + '0';
 228                 if ( ! i++ && (nr_of_digits || alternate_flag))
 229                         *buf_pointer++ = '.';
 230         }
 231
 232         /* Rounding possible */
 233         if (value >= 5)
 234         {
 235                 n = 1; /* Carry */
 236                 cp = buf_pointer - 1;
 237                 do
 238                 {
 239                         if (*cp != '.')
 240                         {
 241                                 if ( (*cp += n) == ('9' + 1) )
 242                                 {
 243                                         *cp = '0';
 244                                         n = 1;
 245                                 }
 246                                 else
 247                                         n = 0;
 248                         }
 249                 } while (cp-- > buf);
 250                 if (n)
 251                 {
 252                         /* %e or %E */
 253                         if (format_flag)
 254                         {
 255                                 cp = buf_pointer;
 256                                 while (cp > buf)
 257                                 {
 258                                         if (*(cp - 1) == '.')
 259                                         {
 260                                                 *cp = *(cp - 2);
 261                                                 cp--;
 262                                         }
 263                                         else
 264                                                 *cp = *(cp - 1);
 265                                         cp--;
 266                                 }
 267                                 integral_10_log++;
 268                         }
 269                         else
 270                         {
 271                                 cp = ++buf_pointer;
 272                                 while (cp > buf)
 273                                 {
 274                                         *cp = *(cp - 1);
 275                                         cp--;
 276                                 }
 277                         }
 278                         *buf = '1';
 279                 }
 280         }
 281
 282 CLEAN_UP:
 283         /* %G - Remove trailing zeros */
 284         if (g_flag)
 285         {
 286                 while (*(buf_pointer - 1) == '0')
 287                         buf_pointer--;
 288                 if (*(buf_pointer - 1) == '.')
 289                         buf_pointer--;
 290         }
 291
 292         /* %e or %E */
 293         if (format_flag)
 294         {
 295                 *buf_pointer++ = format_flag;
 296                 if (integral_10_log < 0)
 297                 {
 298                         *buf_pointer++ = '-';
 299                         integral_10_log = -integral_10_log;
 300                 }
 301                 else
 302                         *buf_pointer++ = '+';
 303                 n = 0;
 304                 buf_pointer +=10;
 305                 do
 306                 {
 307                         n++;
 308                         *buf_pointer++ = (integral_10_log % 10) + '0';
 309                         integral_10_log /= 10;
 310                 } while ( integral_10_log || n < 2 );
 311                 for ( i = n ; n > 0 ; n-- )
 312                         *(buf_pointer - 11 - i + n) = *(buf_pointer - n);
 313                 buf_pointer -= 10;
 314         }
 315         return (buf_pointer);
 316 }
 317
 318 #endif /* CONFIG_PRINTF > PRINTF_NOFLOAT */
 319
 320 /**
 321  * This routine forms the core and entry of the formatter.
 322  *
 323  * The conversion performed conforms to the ANSI specification for "printf".
 324  */
 325 int
 326 PGM_FUNC(_formatted_write)(const char * PGM_ATTR format,
 327                 void put_one_char(char, void *),
 328                 void *secret_pointer,
 329                 va_list ap)
 330 {
 331 #if CONFIG_PRINTF > PRINTF_REDUCED
 332         MEM_ATTRIBUTE static char bad_conversion[] = "???";
 333         MEM_ATTRIBUTE static char null_pointer[] = "<NULL>";
 334
 335         MEM_ATTRIBUTE int precision;
 336         MEM_ATTRIBUTE int n;
 337 #if CONFIG_PRINTF_COUNT_CHARS
 338         MEM_ATTRIBUTE int nr_of_chars;
 339 #endif
 340         MEM_ATTRIBUTE int field_width;
 341         MEM_ATTRIBUTE char format_flag;
 342         enum PLUS_SPACE_FLAGS {
 343                 PSF_NONE, PSF_PLUS, PSF_MINUS
 344         };
 345         enum DIV_FACTOR {
 346                 DIV_DEC, DIV_HEX,
 347 #if CONFIG_PRINTF_OCTAL_FORMATTER
 348                 DIV_OCT,
 349 #endif
 350         };
 351         MEM_ATTRIBUTE struct {
 352                 enum PLUS_SPACE_FLAGS plus_space_flag : 2;
 353 #if CONFIG_PRINTF_OCTAL_FORMATTER
 354                 enum DIV_FACTOR div_factor : 2;
 355 #else
 356                 enum DIV_FACTOR div_factor : 1;
 357 #endif
 358                 bool left_adjust : 1;
 359                 bool l_L_modifier : 1;
 360                 bool h_modifier : 1;
 361                 bool alternate_flag : 1;
 362                 bool nonzero_value : 1;
 363                 bool zeropad : 1;
 364 #if CPU_HARVARD
 365                 bool progmem : 1;
 366 #endif
 367         } flags;
 368         MEM_ATTRIBUTE unsigned long ulong;
 369
 370 #if CONFIG_PRINTF >  PRINTF_NOFLOAT
 371         MEM_ATTRIBUTE max_float_t fvalue;
 372 #endif
 373
 374         MEM_ATTRIBUTE char *buf_pointer;
 375         MEM_ATTRIBUTE char *ptr;
 376         MEM_ATTRIBUTE const char *hex;
 377         MEM_ATTRIBUTE char buf[FRMWRI_BUFSIZE];
 378
 379 #if CONFIG_PRINTF_COUNT_CHARS
 380         nr_of_chars = 0;
 381 #endif
 382         for (;;)    /* Until full format string read */
 383         {
 384                 while ((format_flag = PGM_READ_CHAR(format++)) != '%')    /* Until '%' or '\0' */
 385                 {
 386                         if (!format_flag)
 387 #if CONFIG_PRINTF_RETURN_COUNT
 388                                 return (nr_of_chars);
 389 #else
 390                                 return 0;
 391 #endif
 392                         put_one_char(format_flag, secret_pointer);
 393 #if CONFIG_PRINTF_COUNT_CHARS
 394                         nr_of_chars++;
 395 #endif
 396                 }
 397                 if (PGM_READ_CHAR(format) == '%')    /* %% prints as % */
 398                 {
 399                         format++;
 400                         put_one_char('%', secret_pointer);
 401 #if CONFIG_PRINTF_COUNT_CHARS
 402                         nr_of_chars++;
 403 #endif
 404                         continue;
 405                 }
 406
 407                 flags.left_adjust = false;
 408                 flags.alternate_flag = false;
 409                 flags.plus_space_flag = PSF_NONE;
 410                 flags.zeropad = false;
 411 #if CPU_HARVARD
 412                 flags.progmem = false;
 413 #endif
 414                 ptr = buf_pointer = &buf[0];
 415                 hex = HEX_tab;
 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','z' or 'h' modifier? */
 496                 switch (PGM_READ_CHAR(format))
 497                 {
 498                         case 'l':
 499                         case 'L':
 500                         case 'z':
 501                                 flags.l_L_modifier = true;
 502                                 format++;
 503                                 break;
 504                         case 'h':
 505                                 flags.h_modifier = true;
 506                                 format++;
 507                                 break;
 508                 }
 509
 510                 /*
 511                  * At exit from the following switch, we will emit
 512                  * the characters starting at "buf_pointer" and
 513                  * ending at "ptr"-1
 514                  */
 515                 switch (format_flag = PGM_READ_CHAR(format++))
 516                 {
 517 #if CONFIG_PRINTF_N_FORMATTER
 518                         case 'n':
 519                                 if (sizeof(short) != sizeof(int))
 520                                 {
 521                                         if (sizeof(int) != sizeof(long))
 522                                         {
 523                                                 if (h_modifier)
 524                                                         *va_arg(ap, short *) = nr_of_chars;
 525                                                 else if (flags.l_L_modifier)
 526                                                         *va_arg(ap, long *) = nr_of_chars;
 527                                                 else
 528                                                         *va_arg(ap, int *) = nr_of_chars;
 529                                         }
 530                                         else
 531                                         {
 532                                                 if (h_modifier)
 533                                                         *va_arg(ap, short *) = nr_of_chars;
 534                                                 else
 535                                                         *va_arg(ap, int *) = nr_of_chars;
 536                                         }
 537                                 }
 538                                 else
 539                                 {
 540                                         if (flags.l_L_modifier)
 541                                                 *va_arg(ap, long *) = nr_of_chars;
 542                                         else
 543                                                 *va_arg(ap, int *) = nr_of_chars;
 544                                 }
 545                                 continue;
 546 #endif
 547                         case 'c':
 548                                 buf[0] = va_arg(ap, int);
 549                                 ptr++;
 550                                 break;
 551
 552                         /* Custom formatter for strings in program memory. */
 553                         case 'S':
 554 #if CPU_HARVARD
 555                                 flags.progmem = true;
 556 #endif
 557                                 /* Fall trough */
 558
 559                         case 's':
 560                                 if ( !(buf_pointer = va_arg(ap, char *)) )
 561                                         buf_pointer = null_pointer;
 562                                 if (precision < 0)
 563                                         precision = 10000;
 564
 565                                 /*
 566                                  * Move `ptr' to the last character of the
 567                                  * string that will be actually printed.
 568                                  */
 569                                 ptr = buf_pointer;
 570 #if CPU_HARVARD
 571                                 if (flags.progmem)
 572                                 {
 573                                         for (n=0; pgm_read_char(ptr) && n < precision; n++)
 574                                                 ++ptr;
 575                                 }
 576                                 else
 577 #endif
 578                                 for (n=0; *ptr && n < precision; n++)
 579                                         ++ptr;
 580                                 break;
 581
 582 #if CONFIG_PRINTF_OCTAL_FORMATTER
 583                         case 'o':
 584                                 if (flags.alternate_flag && !precision)
 585                                         precision++;
 586 #endif
 587                         case 'x':
 588                                 hex = hex_tab;
 589                         case 'u':
 590                         case 'p':
 591                         case 'X':
 592                                 if (format_flag == 'p')
 593 #if defined(__AVR__) || defined(__I196__) /* 16bit pointers */
 594                                         ulong = (unsigned long)(unsigned short)va_arg(ap, char *);
 595 #else /* 32bit pointers */
 596                                         ulong = (unsigned long)va_arg(ap, char *);
 597 #endif /* 32bit pointers */
 598                                 else if (flags.l_L_modifier)
 599                                         ulong = va_arg(ap, unsigned long);
 600                                 else if (flags.h_modifier)
 601                                         ulong = (unsigned long)(unsigned short)va_arg(ap, unsigned int);
 602                                 else
 603                                         ulong = va_arg(ap, unsigned int);
 604
 605                                 flags.div_factor =
 606 #if CONFIG_PRINTF_OCTAL_FORMATTER
 607                                         (format_flag == 'o') ? DIV_OCT :
 608 #endif
 609                                         (format_flag == 'u') ? DIV_DEC : DIV_HEX;
 610                                 flags.plus_space_flag = PSF_NONE;
 611                                 goto INTEGRAL_CONVERSION;
 612
 613                         case 'd':
 614                         case 'i':
 615                                 if (flags.l_L_modifier)
 616                                         ulong = (unsigned long)(long)va_arg(ap, long);
 617                                 else
 618                                         ulong = (unsigned long)(long)va_arg(ap, int);
 619
 620                                 /* Extract sign */
 621                                 if ((signed long)ulong < 0)
 622                                 {
 623                                         flags.plus_space_flag = PSF_MINUS;
 624                                         ulong = (unsigned long)(-((signed long)ulong));
 625                                 }
 626
 627                                 flags.div_factor = DIV_DEC;
 628
 629                                 /* Now convert to digits */
 630 INTEGRAL_CONVERSION:
 631                                 ptr = buf_pointer = &buf[FRMWRI_BUFSIZE - 1];
 632                                 flags.nonzero_value = (ulong != 0);
 633
 634                                 /* No char if zero and zero precision */
 635                                 if (precision != 0 || flags.nonzero_value)
 636                                 {
 637                                         switch (flags.div_factor)
 638                                         {
 639                                         case DIV_DEC:
 640                                                 do
 641                                                         *--buf_pointer = hex[ulong % 10];
 642                                                 while (ulong /= 10);
 643                                                 break;
 644
 645                                         case DIV_HEX:
 646                                                 do
 647                                                         *--buf_pointer = hex[ulong % 16];
 648                                                 while (ulong /= 16);
 649                                                 break;
 650 #if CONFIG_PRINTF_OCTAL_FORMATTER
 651                                         case DIV_OCT:
 652                                                 do
 653                                                         *--buf_pointer = hex[ulong % 8];
 654                                                 while (ulong /= 8);
 655                                                 break;
 656 #endif
 657                                         }
 658                                 }
 659
 660                                 /* "precision" takes precedence */
 661                                 if (precision < 0)
 662                                         if (flags.zeropad)
 663                                                 precision = field_width - (flags.plus_space_flag != PSF_NONE);
 664                                 while (precision > (int)(ptr - buf_pointer))
 665                                         *--buf_pointer = '0';
 666
 667                                 if (flags.alternate_flag && flags.nonzero_value)
 668                                 {
 669                                         if (format_flag == 'x' || format_flag == 'X')
 670                                         {
 671                                                 *--buf_pointer = format_flag;
 672                                                 *--buf_pointer = '0';
 673                                         }
 674 #if CONFIG_PRINTF_OCTAL_FORMATTER
 675                                         else if ((format_flag == 'o') && (*buf_pointer != '0'))
 676                                         {
 677                                                 *--buf_pointer = '0';
 678                                         }
 679 #endif
 680                                 }
 681                                 ASSERT(buf_pointer >= buf);
 682                                 break;
 683
 684 #if CONFIG_PRINTF > PRINTF_NOFLOAT
 685                         case 'g':
 686                         case 'G':
 687                                 n = 1;
 688                                 format_flag -= 2;
 689                                 if (! precision)
 690                                 {
 691                                         precision = 1;
 692                                 }
 693                                 goto FLOATING_CONVERSION;
 694                         case 'f':
 695                                 format_flag = 0;
 696                         case 'e':
 697                         case 'E':
 698                                 n = 0;
 699 FLOATING_CONVERSION:
 700                                 if (precision < 0)
 701                                 {
 702                                         precision = 6;
 703                                 }
 704
 705                                 if (sizeof(double) != sizeof(max_float_t))
 706                                 {
 707                                         fvalue = flags.l_L_modifier ?
 708                                                 va_arg(ap,max_float_t) : va_arg(ap,double);
 709                                 }
 710                                 else
 711                                         fvalue = va_arg(ap,max_float_t);
 712
 713                                 if (fvalue < 0)
 714                                 {
 715                                         flags.plus_space_flag = PSF_MINUS;
 716                                         fvalue = -fvalue;
 717                                 }
 718                                 ptr = float_conversion (fvalue,
 719                                                 (short)precision,
 720                                                 buf_pointer += field_width,
 721                                                 format_flag,
 722                                                 (char)n,
 723                                                 flags.alternate_flag);
 724                                 if (flags.zeropad)
 725                                 {
 726                                         precision = field_width - (flags.plus_space_flag != PSF_NONE);
 727                                         while (precision > ptr - buf_pointer)
 728                                                 *--buf_pointer = '0';
 729                                 }
 730                                 break;
 731
 732 #endif /* CONFIG_PRINTF <= PRINTF_NOFLOAT */
 733
 734                         case '\0': /* Really bad place to find NUL in */
 735                                 format--;
 736
 737                         default:
 738                                 /* Undefined conversion! */
 739                                 ptr = buf_pointer = bad_conversion;
 740                                 ptr += sizeof(bad_conversion) - 1;
 741                                 break;
 742
 743                 }
 744
 745                 /*
 746                  * This part emittes the formatted string to "put_one_char".
 747                  */
 748
 749                 /* If field_width == 0 then nothing should be written. */
 750                 precision = ptr - buf_pointer;
 751
 752                 if ( precision > field_width)
 753                 {
 754                         n = 0;
 755                 }
 756                 else
 757                 {
 758                         n = field_width - precision - (flags.plus_space_flag != PSF_NONE);
 759                 }
 760
 761                 /* emit any leading pad characters */
 762                 if (!flags.left_adjust)
 763                         while (--n >= 0)
 764                         {
 765                                 put_one_char(' ', secret_pointer);
 766 #if CONFIG_PRINTF_COUNT_CHARS
 767                                 nr_of_chars++;
 768 #endif
 769                         }
 770
 771                 /* emit flag characters (if any) */
 772                 if (flags.plus_space_flag)
 773                 {
 774                         put_one_char(flags.plus_space_flag == PSF_PLUS ? '+' : '-', secret_pointer);
 775 #if CONFIG_PRINTF_COUNT_CHARS
 776                         nr_of_chars++;
 777 #endif
 778                 }
 779
 780 #if CPU_HARVARD
 781                 if (flags.progmem)
 782                 {
 783                         while (--precision >= 0)
 784                         {
 785                                 put_one_char(pgm_read_char(buf_pointer++), secret_pointer);
 786 #if CONFIG_PRINTF_COUNT_CHARS
 787                                 nr_of_chars++;
 788 #endif
 789                         }
 790                 }
 791                 else
 792 #endif /* CPU_HARVARD */
 793                 {
 794                         /* emit the string itself */
 795                         while (--precision >= 0)
 796                         {
 797                                 put_one_char(*buf_pointer++, secret_pointer);
 798 #if CONFIG_PRINTF_COUNT_CHARS
 799                                 nr_of_chars++;
 800 #endif
 801                         }
 802                 }
 803
 804                 /* emit trailing space characters */
 805                 if (flags.left_adjust)
 806                         while (--n >= 0)
 807                         {
 808                                 put_one_char(' ', secret_pointer);
 809 #if CONFIG_PRINTF_COUNT_CHARS
 810                                 nr_of_chars++;
 811 #endif
 812                         }
 813         }
 814
 815 #else /* PRINTF_REDUCED starts here */
 816
 817 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 818         bool l_modifier, h_modifier;
 819         unsigned long u_val, div_val;
 820 #else
 821         unsigned int u_val, div_val;
 822 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 823
 824         char format_flag;
 825         unsigned int nr_of_chars, base;
 826         char outChar;
 827         char *ptr;
 828
 829         nr_of_chars = 0;
 830         for (;;)    /* Until full format string read */
 831         {
 832                 while ((format_flag = PGM_READ_CHAR(format++)) != '%')    /* Until '%' or '\0' */
 833                 {
 834                         if (!format_flag)
 835                                 return (nr_of_chars);
 836                         put_one_char(format_flag, secret_pointer);
 837                         nr_of_chars++;
 838                 }
 839
 840 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 841                 /*
 842                  * Optional 'l', 'z' or 'h' modifiers?
 843                  */
 844                 l_modifier = h_modifier = false;
 845                 switch (PGM_READ_CHAR(format))
 846                 {
 847                         case 'l':
 848                         case 'z':
 849                                 /* for the 'z' modifier, we make this assumption */
 850                                 STATIC_ASSERT(sizeof(size_t) == sizeof(long));
 851                                 l_modifier = true;
 852                                 format++;
 853                                 break;
 854
 855                         case 'h':
 856                                 h_modifier = true;
 857                                 format++;
 858                                 break;
 859                 }
 860 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 861
 862                 switch (format_flag = PGM_READ_CHAR(format++))
 863                 {
 864                         case 'c':
 865                                 format_flag = va_arg(ap, int);
 866                         default:
 867                                 put_one_char(format_flag, secret_pointer);
 868                                 nr_of_chars++;
 869                                 continue;
 870
 871                         case 's':
 872                                 ptr = va_arg(ap, char *);
 873                                 while ((format_flag = *ptr++))
 874                                 {
 875                                         put_one_char(format_flag, secret_pointer);
 876                                         nr_of_chars++;
 877                                 }
 878                                 continue;
 879
 880                         case 'o':
 881                                 base = 8;
 882                                 if (IS_SHORT)
 883                                         div_val = 0x8000;
 884                                 else
 885                                         div_val = 0x40000000;
 886                                 goto CONVERSION_LOOP;
 887
 888                         case 'd':
 889                                 base = 10;
 890                                 if (IS_SHORT)
 891                                         div_val = 10000;
 892                                 else
 893                                         div_val = 1000000000;
 894                                 goto CONVERSION_LOOP;
 895
 896                         case 'X':
 897                         case 'x':
 898                                 base = 16;
 899                                 if (IS_SHORT)
 900                                         div_val = 0x1000;
 901                                 else
 902                                         div_val = 0x10000000;
 903
 904 CONVERSION_LOOP:
 905 #if CONFIG_PRINTF > PRINTF_NOMODIFIERS
 906                                 if (h_modifier)
 907                                 {
 908                                         if (format_flag == 'd')
 909                                                 u_val = (short)va_arg(ap, int);
 910                                         else
 911                                                 u_val = (unsigned short)va_arg(ap, int);
 912                                 }
 913                                 else if (l_modifier)
 914                                         u_val = va_arg(ap, long);
 915                                 else
 916                                 {
 917                                         if (format_flag == 'd')
 918                                                 u_val = va_arg(ap, int);
 919                                         else
 920                                                 u_val = va_arg(ap, unsigned int);
 921                                 }
 922
 923 #else /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 924                                 u_val = va_arg(ap,int);
 925 #endif /* CONFIG_PRINTF > PRINTF_NOMODIFIERS */
 926                                 if (format_flag == 'd')
 927                                 {
 928                                         if (((int)u_val) < 0)
 929                                         {
 930                                                 u_val = - u_val;
 931                                                 put_one_char('-', secret_pointer);
 932                                                 nr_of_chars++;
 933                                         }
 934                                 }
 935                                 while (div_val > 1 && div_val > u_val)
 936                                 {
 937                                         div_val /= base;
 938                                 }
 939                                 do
 940                                 {
 941                                         outChar = (u_val / div_val) + '0';
 942                                         if (outChar > '9')
 943                                         {
 944                                                 if (format_flag == 'x')
 945                                                         outChar += 'a'-'9'-1;
 946                                                 else
 947                                                         outChar += 'A'-'9'-1;
 948                                         }
 949                                         put_one_char(outChar, secret_pointer);
 950                                         nr_of_chars++;
 951                                         u_val %= div_val;
 952                                         div_val /= base;
 953                                 }
 954                                 while (div_val);
 955
 956                 } /* end switch(format_flag...) */
 957         }
 958 #endif /* CONFIG_PRINTF > PRINTF_REDUCED */
 959 }
 960
 961 #endif /* CONFIG_PRINTF */