shotgun/external_libs/libgdtoa/gdtoaimp.h

   1 /****************************************************************
   2
   3 The author of this software is David M. Gay.
   4
   5 Copyright (C) 1998-2000 by Lucent Technologies
   6 All Rights Reserved
   7
   8 Permission to use, copy, modify, and distribute this software and
   9 its documentation for any purpose and without fee is hereby
  10 granted, provided that the above copyright notice appear in all
  11 copies and that both that the copyright notice and this
  12 permission notice and warranty disclaimer appear in supporting
  13 documentation, and that the name of Lucent or any of its entities
  14 not be used in advertising or publicity pertaining to
  15 distribution of the software without specific, written prior
  16 permission.
  17
  18 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
  20 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
  21 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  22 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
  23 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  24 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
  25 THIS SOFTWARE.
  26
  27 ****************************************************************/
  28
  29 /* $FreeBSD: src/contrib/gdtoa/gdtoaimp.h,v 1.8 2007/01/03 04:59:33 das Exp $ */
  30
  31 /* This is a variation on dtoa.c that converts arbitary binary
  32    floating-point formats to and from decimal notation.  It uses
  33    double-precision arithmetic internally, so there are still
  34    various #ifdefs that adapt the calculations to the native
  35    double-precision arithmetic (any of IEEE, VAX D_floating,
  36    or IBM mainframe arithmetic).
  37
  38    Please send bug reports to David M. Gay (dmg at acm dot org,
  39    with " at " changed at "@" and " dot " changed to ".").
  40  */
  41
  42 /* On a machine with IEEE extended-precision registers, it is
  43  * necessary to specify double-precision (53-bit) rounding precision
  44  * before invoking strtod or dtoa.  If the machine uses (the equivalent
  45  * of) Intel 80x87 arithmetic, the call
  46  *      _control87(PC_53, MCW_PC);
  47  * does this with many compilers.  Whether this or another call is
  48  * appropriate depends on the compiler; for this to work, it may be
  49  * necessary to #include "float.h" or another system-dependent header
  50  * file.
  51  */
  52
  53 /* strtod for IEEE-, VAX-, and IBM-arithmetic machines.
  54  *
  55  * This strtod returns a nearest machine number to the input decimal
  56  * string (or sets errno to ERANGE).  With IEEE arithmetic, ties are
  57  * broken by the IEEE round-even rule.  Otherwise ties are broken by
  58  * biased rounding (add half and chop).
  59  *
  60  * Inspired loosely by William D. Clinger's paper "How to Read Floating
  61  * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 112-126].
  62  *
  63  * Modifications:
  64  *
  65  *      1. We only require IEEE, IBM, or VAX double-precision
  66  *              arithmetic (not IEEE double-extended).
  67  *      2. We get by with floating-point arithmetic in a case that
  68  *              Clinger missed -- when we're computing d * 10^n
  69  *              for a small integer d and the integer n is not too
  70  *              much larger than 22 (the maximum integer k for which
  71  *              we can represent 10^k exactly), we may be able to
  72  *              compute (d*10^k) * 10^(e-k) with just one roundoff.
  73  *      3. Rather than a bit-at-a-time adjustment of the binary
  74  *              result in the hard case, we use floating-point
  75  *              arithmetic to determine the adjustment to within
  76  *              one bit; only in really hard cases do we need to
  77  *              compute a second residual.
  78  *      4. Because of 3., we don't need a large table of powers of 10
  79  *              for ten-to-e (just some small tables, e.g. of 10^k
  80  *              for 0 <= k <= 22).
  81  */
  82
  83 /*
  84  * #define IEEE_8087 for IEEE-arithmetic machines where the least
  85  *      significant byte has the lowest address.
  86  * #define IEEE_MC68k for IEEE-arithmetic machines where the most
  87  *      significant byte has the lowest address.
  88  * #define Long int on machines with 32-bit ints and 64-bit longs.
  89  * #define Sudden_Underflow for IEEE-format machines without gradual
  90  *      underflow (i.e., that flush to zero on underflow).
  91  * #define IBM for IBM mainframe-style floating-point arithmetic.
  92  * #define VAX for VAX-style floating-point arithmetic (D_floating).
  93  * #define No_leftright to omit left-right logic in fast floating-point
  94  *      computation of dtoa.
  95  * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3.
  96  * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines
  97  *      that use extended-precision instructions to compute rounded
  98  *      products and quotients) with IBM.
  99  * #define ROUND_BIASED for IEEE-format with biased rounding.
 100  * #define Inaccurate_Divide for IEEE-format with correctly rounded
 101  *      products but inaccurate quotients, e.g., for Intel i860.
 102  * #define NO_LONG_LONG on machines that do not have a "long long"
 103  *      integer type (of >= 64 bits).  On such machines, you can
 104  *      #define Just_16 to store 16 bits per 32-bit Long when doing
 105  *      high-precision integer arithmetic.  Whether this speeds things
 106  *      up or slows things down depends on the machine and the number
 107  *      being converted.  If long long is available and the name is
 108  *      something other than "long long", #define Llong to be the name,
 109  *      and if "unsigned Llong" does not work as an unsigned version of
 110  *      Llong, #define #ULLong to be the corresponding unsigned type.
 111  * #define KR_headers for old-style C function headers.
 112  * #define Bad_float_h if your system lacks a float.h or if it does not
 113  *      define some or all of DBL_DIG, DBL_MAX_10_EXP, DBL_MAX_EXP,
 114  *      FLT_RADIX, FLT_ROUNDS, and DBL_MAX.
 115  * #define MALLOC your_malloc, where your_malloc(n) acts like malloc(n)
 116  *      if memory is available and otherwise does something you deem
 117  *      appropriate.  If MALLOC is undefined, malloc will be invoked
 118  *      directly -- and assumed always to succeed.
 119  * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making
 120  *      memory allocations from a private pool of memory when possible.
 121  *      When used, the private pool is PRIVATE_MEM bytes long:  2304 bytes,
 122  *      unless #defined to be a different length.  This default length
 123  *      suffices to get rid of MALLOC calls except for unusual cases,
 124  *      such as decimal-to-binary conversion of a very long string of
 125  *      digits.  When converting IEEE double precision values, the
 126  *      longest string gdtoa can return is about 751 bytes long.  For
 127  *      conversions by strtod of strings of 800 digits and all gdtoa
 128  *      conversions of IEEE doubles in single-threaded executions with
 129  *      8-byte pointers, PRIVATE_MEM >= 7400 appears to suffice; with
 130  *      4-byte pointers, PRIVATE_MEM >= 7112 appears adequate.
 131  * #define INFNAN_CHECK on IEEE systems to cause strtod to check for
 132  *      Infinity and NaN (case insensitively).
 133  *      When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
 134  *      strtodg also accepts (case insensitively) strings of the form
 135  *      NaN(x), where x is a string of hexadecimal digits and spaces;
 136  *      if there is only one string of hexadecimal digits, it is taken
 137  *      for the fraction bits of the resulting NaN; if there are two or
 138  *      more strings of hexadecimal digits, each string is assigned
 139  *      to the next available sequence of 32-bit words of fractions
 140  *      bits (starting with the most significant), right-aligned in
 141  *      each sequence.
 142  * #define MULTIPLE_THREADS if the system offers preemptively scheduled
 143  *      multiple threads.  In this case, you must provide (or suitably
 144  *      #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed
 145  *      by FREE_DTOA_LOCK(n) for n = 0 or 1.  (The second lock, accessed
 146  *      in pow5mult, ensures lazy evaluation of only one copy of high
 147  *      powers of 5; omitting this lock would introduce a small
 148  *      probability of wasting memory, but would otherwise be harmless.)
 149  *      You must also invoke freedtoa(s) to free the value s returned by
 150  *      dtoa.  You may do so whether or not MULTIPLE_THREADS is #defined.
 151  * #define IMPRECISE_INEXACT if you do not care about the setting of
 152  *      the STRTOG_Inexact bits in the special case of doing IEEE double
 153  *      precision conversions (which could also be done by the strtog in
 154  *      dtoa.c).
 155  * #define NO_HEX_FP to disable recognition of C9x's hexadecimal
 156  *      floating-point constants.
 157  * #define -DNO_ERRNO to suppress setting errno (in strtod.c and
 158  *      strtodg.c).
 159  * #define NO_STRING_H to use private versions of memcpy.
 160  *      On some K&R systems, it may also be necessary to
 161  *      #define DECLARE_SIZE_T in this case.
 162  * #define YES_ALIAS to permit aliasing certain double values with
 163  *      arrays of ULongs.  This leads to slightly better code with
 164  *      some compilers and was always used prior to 19990916, but it
 165  *      is not strictly legal and can cause trouble with aggressively
 166  *      optimizing compilers (e.g., gcc 2.95.1 under -O2).
 167  * #define USE_LOCALE to use the current locale's decimal_point value.
 168  */
 169
 170 #ifndef GDTOAIMP_H_INCLUDED
 171 #define GDTOAIMP_H_INCLUDED
 172 #include "gdtoa.h"
 173 #include "gd_qnan.h"
 174
 175 #ifdef DEBUG
 176 #include "stdio.h"
 177 #define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
 178 #endif
 179
 180 #include "limits.h"
 181 #include "stdlib.h"
 182 #include "string.h"
 183
 184 #ifdef KR_headers
 185 #define Char char
 186 #else
 187 #define Char void
 188 #endif
 189
 190 #ifdef MALLOC
 191 extern Char *MALLOC ANSI((size_t));
 192 #else
 193 #define MALLOC malloc
 194 #endif
 195
 196 #define INFNAN_CHECK
 197 #define USE_LOCALE
 198 #define Honor_FLT_ROUNDS
 199
 200 #undef IEEE_Arith
 201 #undef Avoid_Underflow
 202 #ifdef IEEE_MC68k
 203 #define IEEE_Arith
 204 #endif
 205 #ifdef IEEE_8087
 206 #define IEEE_Arith
 207 #endif
 208
 209 #include "errno.h"
 210 #ifdef Bad_float_h
 211
 212 #ifdef IEEE_Arith
 213 #define DBL_DIG 15
 214 #define DBL_MAX_10_EXP 308
 215 #define DBL_MAX_EXP 1024
 216 #define FLT_RADIX 2
 217 #define DBL_MAX 1.7976931348623157e+308
 218 #endif
 219
 220 #ifdef IBM
 221 #define DBL_DIG 16
 222 #define DBL_MAX_10_EXP 75
 223 #define DBL_MAX_EXP 63
 224 #define FLT_RADIX 16
 225 #define DBL_MAX 7.2370055773322621e+75
 226 #endif
 227
 228 #ifdef VAX
 229 #define DBL_DIG 16
 230 #define DBL_MAX_10_EXP 38
 231 #define DBL_MAX_EXP 127
 232 #define FLT_RADIX 2
 233 #define DBL_MAX 1.7014118346046923e+38
 234 #define n_bigtens 2
 235 #endif
 236
 237 #ifndef LONG_MAX
 238 #define LONG_MAX 2147483647
 239 #endif
 240
 241 #else /* ifndef Bad_float_h */
 242 #include "float.h"
 243 #endif /* Bad_float_h */
 244
 245 #ifdef IEEE_Arith
 246 #define Scale_Bit 0x10
 247 #define n_bigtens 5
 248 #endif
 249
 250 #ifdef IBM
 251 #define n_bigtens 3
 252 #endif
 253
 254 #ifdef VAX
 255 #define n_bigtens 2
 256 #endif
 257
 258 #ifndef __MATH_H__
 259 #include "math.h"
 260 #endif
 261
 262 #ifdef __cplusplus
 263 extern "C" {
 264 #endif
 265
 266 #if defined(IEEE_8087) + defined(IEEE_MC68k) + defined(VAX) + defined(IBM) != 1
 267 Exactly one of IEEE_8087, IEEE_MC68k, VAX, or IBM should be defined.
 268 #endif
 269
 270 typedef union { double d; ULong L[2]; } U;
 271
 272 #ifdef YES_ALIAS
 273 #define dval(x) x
 274 #ifdef IEEE_8087
 275 #define word0(x) ((ULong *)&x)[1]
 276 #define word1(x) ((ULong *)&x)[0]
 277 #else
 278 #define word0(x) ((ULong *)&x)[0]
 279 #define word1(x) ((ULong *)&x)[1]
 280 #endif
 281 #else /* !YES_ALIAS */
 282 #ifdef IEEE_8087
 283 #define word0(x) ((U*)&x)->L[1]
 284 #define word1(x) ((U*)&x)->L[0]
 285 #else
 286 #define word0(x) ((U*)&x)->L[0]
 287 #define word1(x) ((U*)&x)->L[1]
 288 #endif
 289 #define dval(x) ((U*)&x)->d
 290 #endif /* YES_ALIAS */
 291
 292 /* The following definition of Storeinc is appropriate for MIPS processors.
 293  * An alternative that might be better on some machines is
 294  * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff)
 295  */
 296 #if defined(IEEE_8087) + defined(VAX)
 297 #define Storeinc(a,b,c) (((unsigned short *)a)[1] = (unsigned short)b, \
 298 ((unsigned short *)a)[0] = (unsigned short)c, a++)
 299 #else
 300 #define Storeinc(a,b,c) (((unsigned short *)a)[0] = (unsigned short)b, \
 301 ((unsigned short *)a)[1] = (unsigned short)c, a++)
 302 #endif
 303
 304 /* #define P DBL_MANT_DIG */
 305 /* Ten_pmax = floor(P*log(2)/log(5)) */
 306 /* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */
 307 /* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */
 308 /* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */
 309
 310 #ifdef IEEE_Arith
 311 #define Exp_shift  20
 312 #define Exp_shift1 20
 313 #define Exp_msk1    0x100000
 314 #define Exp_msk11   0x100000
 315 #define Exp_mask  0x7ff00000
 316 #define P 53
 317 #define Bias 1023
 318 #define Emin (-1022)
 319 #define Exp_1  0x3ff00000
 320 #define Exp_11 0x3ff00000
 321 #define Ebits 11
 322 #define Frac_mask  0xfffff
 323 #define Frac_mask1 0xfffff
 324 #define Ten_pmax 22
 325 #define Bletch 0x10
 326 #define Bndry_mask  0xfffff
 327 #define Bndry_mask1 0xfffff
 328 #define LSB 1
 329 #define Sign_bit 0x80000000
 330 #define Log2P 1
 331 #define Tiny0 0
 332 #define Tiny1 1
 333 #define Quick_max 14
 334 #define Int_max 14
 335
 336 #ifndef Flt_Rounds
 337 #ifdef FLT_ROUNDS
 338 #define Flt_Rounds FLT_ROUNDS
 339 #else
 340 #define Flt_Rounds 1
 341 #endif
 342 #endif /*Flt_Rounds*/
 343
 344 #else /* ifndef IEEE_Arith */
 345 #undef  Sudden_Underflow
 346 #define Sudden_Underflow
 347 #ifdef IBM
 348 #undef Flt_Rounds
 349 #define Flt_Rounds 0
 350 #define Exp_shift  24
 351 #define Exp_shift1 24
 352 #define Exp_msk1   0x1000000
 353 #define Exp_msk11  0x1000000
 354 #define Exp_mask  0x7f000000
 355 #define P 14
 356 #define Bias 65
 357 #define Exp_1  0x41000000
 358 #define Exp_11 0x41000000
 359 #define Ebits 8 /* exponent has 7 bits, but 8 is the right value in b2d */
 360 #define Frac_mask  0xffffff
 361 #define Frac_mask1 0xffffff
 362 #define Bletch 4
 363 #define Ten_pmax 22
 364 #define Bndry_mask  0xefffff
 365 #define Bndry_mask1 0xffffff
 366 #define LSB 1
 367 #define Sign_bit 0x80000000
 368 #define Log2P 4
 369 #define Tiny0 0x100000
 370 #define Tiny1 0
 371 #define Quick_max 14
 372 #define Int_max 15
 373 #else /* VAX */
 374 #undef Flt_Rounds
 375 #define Flt_Rounds 1
 376 #define Exp_shift  23
 377 #define Exp_shift1 7
 378 #define Exp_msk1    0x80
 379 #define Exp_msk11   0x800000
 380 #define Exp_mask  0x7f80
 381 #define P 56
 382 #define Bias 129
 383 #define Exp_1  0x40800000
 384 #define Exp_11 0x4080
 385 #define Ebits 8
 386 #define Frac_mask  0x7fffff
 387 #define Frac_mask1 0xffff007f
 388 #define Ten_pmax 24
 389 #define Bletch 2
 390 #define Bndry_mask  0xffff007f
 391 #define Bndry_mask1 0xffff007f
 392 #define LSB 0x10000
 393 #define Sign_bit 0x8000
 394 #define Log2P 1
 395 #define Tiny0 0x80
 396 #define Tiny1 0
 397 #define Quick_max 15
 398 #define Int_max 15
 399 #endif /* IBM, VAX */
 400 #endif /* IEEE_Arith */
 401
 402 #ifndef IEEE_Arith
 403 #define ROUND_BIASED
 404 #endif
 405
 406 #ifdef RND_PRODQUOT
 407 #define rounded_product(a,b) a = rnd_prod(a, b)
 408 #define rounded_quotient(a,b) a = rnd_quot(a, b)
 409 #ifdef KR_headers
 410 extern double rnd_prod(), rnd_quot();
 411 #else
 412 extern double rnd_prod(double, double), rnd_quot(double, double);
 413 #endif
 414 #else
 415 #define rounded_product(a,b) a *= b
 416 #define rounded_quotient(a,b) a /= b
 417 #endif
 418
 419 #define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1))
 420 #define Big1 0xffffffff
 421
 422 #undef  Pack_16
 423 #ifndef Pack_32
 424 #define Pack_32
 425 #endif
 426
 427 #ifdef NO_LONG_LONG
 428 #undef ULLong
 429 #ifdef Just_16
 430 #undef Pack_32
 431 #define Pack_16
 432 /* When Pack_32 is not defined, we store 16 bits per 32-bit Long.
 433  * This makes some inner loops simpler and sometimes saves work
 434  * during multiplications, but it often seems to make things slightly
 435  * slower.  Hence the default is now to store 32 bits per Long.
 436  */
 437 #endif
 438 #else   /* long long available */
 439 #ifndef Llong
 440 #define Llong long long
 441 #endif
 442 #ifndef ULLong
 443 #define ULLong unsigned Llong
 444 #endif
 445 #endif /* NO_LONG_LONG */
 446
 447 #ifdef Pack_32
 448 #define ULbits 32
 449 #define kshift 5
 450 #define kmask 31
 451 #define ALL_ON 0xffffffff
 452 #else
 453 #define ULbits 16
 454 #define kshift 4
 455 #define kmask 15
 456 #define ALL_ON 0xffff
 457 #endif
 458
 459 /* Copied from ruby1.9 util.c r15761
 460  * http://svn.ruby-lang.org/repos/ruby/trunk
 461  */
 462 #ifndef MULTIPLE_THREADS
 463 #define ACQUIRE_DTOA_LOCK(n)    /*nothing*/
 464 #define FREE_DTOA_LOCK(n)       /*nothing*/
 465 #endif
 466
 467 #define Kmax 15
 468
 469  struct
 470 Bigint {
 471         struct Bigint *next;
 472         int k, maxwds, sign, wds;
 473         ULong x[1];
 474         };
 475
 476  typedef struct Bigint Bigint;
 477
 478 #ifdef NO_STRING_H
 479 #ifdef DECLARE_SIZE_T
 480 typedef unsigned int size_t;
 481 #endif
 482 extern void memcpy_D2A ANSI((void*, const void*, size_t));
 483 #define Bcopy(x,y) memcpy_D2A(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int))
 484 #else /* !NO_STRING_H */
 485 #define Bcopy(x,y) memcpy(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int))
 486 #endif /* NO_STRING_H */
 487
 488 #ifdef GDTOA_PARANOIA
 489 /*
 490  * Paranoia: Protect exported symbols, including ones in files we don't
 491  * compile right now.  The standard strtof and strtod survive.
 492  */
 493 #define  dtoa    __dtoa
 494 #define gdtoa           __gdtoa
 495 #define freedtoa        __freedtoa
 496 #define strtodg         __strtodg
 497 #define g_ddfmt         __g_ddfmt
 498 #define g_dfmt          __g_dfmt
 499 #define g_ffmt          __g_ffmt
 500 #define g_Qfmt          __g_Qfmt
 501 #define g_xfmt          __g_xfmt
 502 #define g_xLfmt         __g_xLfmt
 503 #define strtoId         __strtoId
 504 #define strtoIdd        __strtoIdd
 505 #define strtoIf         __strtoIf
 506 #define strtoIQ         __strtoIQ
 507 #define strtoIx         __strtoIx
 508 #define strtoIxL        __strtoIxL
 509 #define strtord         __strtord
 510 #define strtordd        __strtordd
 511 #define strtorf         __strtorf
 512 #define strtorQ         __strtorQ
 513 #define strtorx         __strtorx
 514 #define strtorxL        __strtorxL
 515 #define strtodI         __strtodI
 516 #define strtopd         __strtopd
 517 #define strtopdd        __strtopdd
 518 #define strtopf         __strtopf
 519 #define strtopQ         __strtopQ
 520 #define strtopx         __strtopx
 521 #define strtopxL        __strtopxL
 522 #endif
 523
 524 /* Protect gdtoa-internal symbols */
 525 #define Balloc          __Balloc_D2A
 526 #define Bfree           __Bfree_D2A
 527 #define ULtoQ           __ULtoQ_D2A
 528 #define ULtof           __ULtof_D2A
 529 #define ULtod           __ULtod_D2A
 530 #define ULtodd          __ULtodd_D2A
 531 #define ULtox           __ULtox_D2A
 532 #define ULtoxL          __ULtoxL_D2A
 533 #define any_on          __any_on_D2A
 534 #define b2d             __b2d_D2A
 535 #define bigtens         __bigtens_D2A
 536 #define cmp             __cmp_D2A
 537 #define copybits        __copybits_D2A
 538 #define d2b             __d2b_D2A
 539 #define decrement       __decrement_D2A
 540 #define diff            __diff_D2A
 541 #define dtoa_result     __dtoa_result_D2A
 542 #define g__fmt          __g__fmt_D2A
 543 #define gethex          __gethex_D2A
 544 #define hexdig          __hexdig_D2A
 545 #define hexdig_init_D2A __hexdig_init_D2A
 546 #define hexnan          __hexnan_D2A
 547 #define hi0bits         __hi0bits_D2A
 548 #define hi0bits_D2A     __hi0bits_D2A
 549 #define i2b             __i2b_D2A
 550 #define increment       __increment_D2A
 551 #define lo0bits         __lo0bits_D2A
 552 #define lshift          __lshift_D2A
 553 #define match           __match_D2A
 554 #define mult            __mult_D2A
 555 #define multadd         __multadd_D2A
 556 #define nrv_alloc       __nrv_alloc_D2A
 557 #define pow5mult        __pow5mult_D2A
 558 #define quorem          __quorem_D2A
 559 #define ratio           __ratio_D2A
 560 #define rshift          __rshift_D2A
 561 #define rv_alloc        __rv_alloc_D2A
 562 #define s2b             __s2b_D2A
 563 #define set_ones        __set_ones_D2A
 564 #define strcp           __strcp_D2A
 565 #define strcp_D2A       __strcp_D2A
 566 #define strtoIg         __strtoIg_D2A
 567 #define sum             __sum_D2A
 568 #define tens            __tens_D2A
 569 #define tinytens        __tinytens_D2A
 570 #define tinytens        __tinytens_D2A
 571 #define trailz          __trailz_D2A
 572 #define ulp             __ulp_D2A
 573
 574  extern char *dtoa_result;
 575  extern CONST double bigtens[], tens[], tinytens[];
 576  extern unsigned char hexdig[];
 577
 578  extern Bigint *Balloc ANSI((int));
 579  extern void Bfree ANSI((Bigint*));
 580  extern void ULtof ANSI((ULong*, ULong*, Long, int));
 581  extern void ULtod ANSI((ULong*, ULong*, Long, int));
 582  extern void ULtodd ANSI((ULong*, ULong*, Long, int));
 583  extern void ULtoQ ANSI((ULong*, ULong*, Long, int));
 584  extern void ULtox ANSI((UShort*, ULong*, Long, int));
 585  extern void ULtoxL ANSI((ULong*, ULong*, Long, int));
 586  extern ULong any_on ANSI((Bigint*, int));
 587  extern double b2d ANSI((Bigint*, int*));
 588  extern int cmp ANSI((Bigint*, Bigint*));
 589  extern void copybits ANSI((ULong*, int, Bigint*));
 590  extern Bigint *d2b ANSI((double, int*, int*));
 591  extern int decrement ANSI((Bigint*));
 592  extern Bigint *diff ANSI((Bigint*, Bigint*));
 593  extern char *dtoa ANSI((double d, int mode, int ndigits,
 594                         int *decpt, int *sign, char **rve));
 595  extern void freedtoa ANSI((char*));
 596  extern char *gdtoa ANSI((FPI *fpi, int be, ULong *bits, int *kindp,
 597                           int mode, int ndigits, int *decpt, char **rve));
 598  extern char *g__fmt ANSI((char*, char*, char*, int, ULong));
 599  extern int gethex ANSI((CONST char**, FPI*, Long*, Bigint**, int));
 600  extern void hexdig_init_D2A(Void);
 601  extern int hexnan ANSI((CONST char**, FPI*, ULong*));
 602  extern int hi0bits ANSI((ULong));
 603  extern Bigint *i2b ANSI((int));
 604  extern Bigint *increment ANSI((Bigint*));
 605  extern int lo0bits ANSI((ULong*));
 606  extern Bigint *lshift ANSI((Bigint*, int));
 607  extern int match ANSI((CONST char**, char*));
 608  extern Bigint *mult ANSI((Bigint*, Bigint*));
 609  extern Bigint *multadd ANSI((Bigint*, int, int));
 610  extern char *nrv_alloc ANSI((char*, char **, int));
 611  extern Bigint *pow5mult ANSI((Bigint*, int));
 612  extern int quorem ANSI((Bigint*, Bigint*));
 613  extern double ratio ANSI((Bigint*, Bigint*));
 614  extern void rshift ANSI((Bigint*, int));
 615  extern char *rv_alloc ANSI((int));
 616  extern Bigint *s2b ANSI((CONST char*, int, int, ULong));
 617  extern Bigint *set_ones ANSI((Bigint*, int));
 618  extern char *strcp ANSI((char*, const char*));
 619  extern int strtodg ANSI((CONST char*, char**, FPI*, Long*, ULong*));
 620
 621  extern int strtoId ANSI((CONST char *, char **, double *, double *));
 622  extern int strtoIdd ANSI((CONST char *, char **, double *, double *));
 623  extern int strtoIf ANSI((CONST char *, char **, float *, float *));
 624  extern int strtoIg ANSI((CONST char*, char**, FPI*, Long*, Bigint**, int*));
 625  extern int strtoIQ ANSI((CONST char *, char **, void *, void *));
 626  extern int strtoIx ANSI((CONST char *, char **, void *, void *));
 627  extern int strtoIxL ANSI((CONST char *, char **, void *, void *));
 628  extern double ruby_strtod ANSI((const char *s00, char **se));
 629  extern int strtopQ ANSI((CONST char *, char **, Void *));
 630  extern int strtopf ANSI((CONST char *, char **, float *));
 631  extern int strtopd ANSI((CONST char *, char **, double *));
 632  extern int strtopdd ANSI((CONST char *, char **, double *));
 633  extern int strtopx ANSI((CONST char *, char **, Void *));
 634  extern int strtopxL ANSI((CONST char *, char **, Void *));
 635  extern int strtord ANSI((CONST char *, char **, int, double *));
 636  extern int strtordd ANSI((CONST char *, char **, int, double *));
 637  extern int strtorf ANSI((CONST char *, char **, int, float *));
 638  extern int strtorQ ANSI((CONST char *, char **, int, void *));
 639  extern int strtorx ANSI((CONST char *, char **, int, void *));
 640  extern int strtorxL ANSI((CONST char *, char **, int, void *));
 641  extern Bigint *sum ANSI((Bigint*, Bigint*));
 642  extern int trailz ANSI((Bigint*));
 643  extern double ulp ANSI((double));
 644
 645 #ifdef __cplusplus
 646 }
 647 #endif
 648 /*
 649  * NAN_WORD0 and NAN_WORD1 are only referenced in strtod.c.  Prior to
 650  * 20050115, they used to be hard-wired here (to 0x7ff80000 and 0,
 651  * respectively), but now are determined by compiling and running
 652  * qnan.c to generate gd_qnan.h, which specifies d_QNAN0 and d_QNAN1.
 653  * Formerly gdtoaimp.h recommended supplying suitable -DNAN_WORD0=...
 654  * and -DNAN_WORD1=...  values if necessary.  This should still work.
 655  * (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
 656  */
 657 #ifdef IEEE_Arith
 658 #ifdef IEEE_MC68k
 659 #define _0 0
 660 #define _1 1
 661 #ifndef NAN_WORD0
 662 #define NAN_WORD0 d_QNAN0
 663 #endif
 664 #ifndef NAN_WORD1
 665 #define NAN_WORD1 d_QNAN1
 666 #endif
 667 #else
 668 #define _0 1
 669 #define _1 0
 670 #ifndef NAN_WORD0
 671 #define NAN_WORD0 d_QNAN1
 672 #endif
 673 #ifndef NAN_WORD1
 674 #define NAN_WORD1 d_QNAN0
 675 #endif
 676 #endif
 677 #else
 678 #undef INFNAN_CHECK
 679 #endif
 680
 681 #undef SI
 682 #ifdef Sudden_Underflow
 683 #define SI 1
 684 #else
 685 #define SI 0
 686 #endif
 687
 688 #endif /* GDTOAIMP_H_INCLUDED */