gdtoaimp.h revision 112418
1218887Sdim/**************************************************************** 2218887Sdim 3218887SdimThe author of this software is David M. Gay. 4218887Sdim 5218887SdimCopyright (C) 1998-2000 by Lucent Technologies 6218887SdimAll Rights Reserved 7218887Sdim 8218887SdimPermission to use, copy, modify, and distribute this software and 9218887Sdimits documentation for any purpose and without fee is hereby 10218887Sdimgranted, provided that the above copyright notice appear in all 11218887Sdimcopies and that both that the copyright notice and this 12218887Sdimpermission notice and warranty disclaimer appear in supporting 13218887Sdimdocumentation, and that the name of Lucent or any of its entities 14218887Sdimnot be used in advertising or publicity pertaining to 15280031Sdimdistribution of the software without specific, written prior 16280031Sdimpermission. 17218887Sdim 18327952SdimLUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 19243830SdimINCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 20218887SdimIN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 21218887SdimSPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 22239462SdimWHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 23218887SdimIN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 24218887SdimARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 25218887SdimTHIS SOFTWARE. 26280031Sdim 27280031Sdim****************************************************************/ 28218887Sdim 29218887Sdim/* $FreeBSD: head/contrib/gdtoa/gdtoaimp.h 112418 2003-03-19 20:25:45Z das $ */ 30218887Sdim 31218887Sdim/* This is a variation on dtoa.c that converts arbitary binary 32234353Sdim floating-point formats to and from decimal notation. It uses 33234353Sdim double-precision arithmetic internally, so there are still 34218887Sdim various #ifdefs that adapt the calculations to the native 35218887Sdim double-precision arithmetic (any of IEEE, VAX D_floating, 36226633Sdim or IBM mainframe arithmetic). 37234353Sdim 38239462Sdim Please send bug reports to 39218887Sdim David M. Gay 40218887Sdim Bell Laboratories, Room 2C-463 41218887Sdim 600 Mountain Avenue 42218887Sdim Murray Hill, NJ 07974-0636 43218887Sdim U.S.A. 44218887Sdim dmg@bell-labs.com 45218887Sdim */ 46218887Sdim 47243830Sdim/* On a machine with IEEE extended-precision registers, it is 48341825Sdim * necessary to specify double-precision (53-bit) rounding precision 49239462Sdim * before invoking strtod or dtoa. If the machine uses (the equivalent 50239462Sdim * of) Intel 80x87 arithmetic, the call 51239462Sdim * _control87(PC_53, MCW_PC); 52218887Sdim * does this with many compilers. Whether this or another call is 53341825Sdim * appropriate depends on the compiler; for this to work, it may be 54218887Sdim * necessary to #include "float.h" or another system-dependent header 55280031Sdim * file. 56280031Sdim */ 57218887Sdim 58288943Sdim/* strtod for IEEE-, VAX-, and IBM-arithmetic machines. 59288943Sdim * 60218887Sdim * This strtod returns a nearest machine number to the input decimal 61218887Sdim * string (or sets errno to ERANGE). With IEEE arithmetic, ties are 62218887Sdim * broken by the IEEE round-even rule. Otherwise ties are broken by 63341825Sdim * biased rounding (add half and chop). 64234353Sdim * 65218887Sdim * Inspired loosely by William D. Clinger's paper "How to Read Floating 66218887Sdim * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101]. 67218887Sdim * 68218887Sdim * Modifications: 69218887Sdim * 70218887Sdim * 1. We only require IEEE, IBM, or VAX double-precision 71276479Sdim * arithmetic (not IEEE double-extended). 72276479Sdim * 2. We get by with floating-point arithmetic in a case that 73261991Sdim * Clinger missed -- when we're computing d * 10^n 74261991Sdim * for a small integer d and the integer n is not too 75218887Sdim * much larger than 22 (the maximum integer k for which 76218887Sdim * we can represent 10^k exactly), we may be able to 77218887Sdim * compute (d*10^k) * 10^(e-k) with just one roundoff. 78218887Sdim * 3. Rather than a bit-at-a-time adjustment of the binary 79218887Sdim * result in the hard case, we use floating-point 80218887Sdim * arithmetic to determine the adjustment to within 81218887Sdim * one bit; only in really hard cases do we need to 82276479Sdim * compute a second residual. 83218887Sdim * 4. Because of 3., we don't need a large table of powers of 10 84218887Sdim * for ten-to-e (just some small tables, e.g. of 10^k 85218887Sdim * for 0 <= k <= 22). 86276479Sdim */ 87218887Sdim 88218887Sdim/* 89218887Sdim * #define IEEE_8087 for IEEE-arithmetic machines where the least 90276479Sdim * significant byte has the lowest address. 91218887Sdim * #define IEEE_MC68k for IEEE-arithmetic machines where the most 92218887Sdim * significant byte has the lowest address. 93218887Sdim * #define Long int on machines with 32-bit ints and 64-bit longs. 94234353Sdim * #define Sudden_Underflow for IEEE-format machines without gradual 95234353Sdim * underflow (i.e., that flush to zero on underflow). 96218887Sdim * #define IBM for IBM mainframe-style floating-point arithmetic. 97218887Sdim * #define VAX for VAX-style floating-point arithmetic (D_floating). 98276479Sdim * #define No_leftright to omit left-right logic in fast floating-point 99239462Sdim * computation of dtoa. 100218887Sdim * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3. 101218887Sdim * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines 102239462Sdim * that use extended-precision instructions to compute rounded 103239462Sdim * products and quotients) with IBM. 104218887Sdim * #define ROUND_BIASED for IEEE-format with biased rounding. 105243830Sdim * #define Inaccurate_Divide for IEEE-format with correctly rounded 106243830Sdim * products but inaccurate quotients, e.g., for Intel i860. 107218887Sdim * #define NO_LONG_LONG on machines that do not have a "long long" 108218887Sdim * integer type (of >= 64 bits). On such machines, you can 109243830Sdim * #define Just_16 to store 16 bits per 32-bit Long when doing 110249423Sdim * high-precision integer arithmetic. Whether this speeds things 111243830Sdim * up or slows things down depends on the machine and the number 112218887Sdim * being converted. If long long is available and the name is 113218887Sdim * something other than "long long", #define Llong to be the name, 114218887Sdim * and if "unsigned Llong" does not work as an unsigned version of 115218887Sdim * Llong, #define #ULLong to be the corresponding unsigned type. 116218887Sdim * #define KR_headers for old-style C function headers. 117226633Sdim * #define Bad_float_h if your system lacks a float.h or if it does not 118226633Sdim * define some or all of DBL_DIG, DBL_MAX_10_EXP, DBL_MAX_EXP, 119226633Sdim * FLT_RADIX, FLT_ROUNDS, and DBL_MAX. 120218887Sdim * #define MALLOC your_malloc, where your_malloc(n) acts like malloc(n) 121218887Sdim * if memory is available and otherwise does something you deem 122218887Sdim * appropriate. If MALLOC is undefined, malloc will be invoked 123218887Sdim * directly -- and assumed always to succeed. 124218887Sdim * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making 125218887Sdim * memory allocations from a private pool of memory when possible. 126234353Sdim * When used, the private pool is PRIVATE_MEM bytes long: 2304 bytes, 127218887Sdim * unless #defined to be a different length. This default length 128218887Sdim * suffices to get rid of MALLOC calls except for unusual cases, 129341825Sdim * such as decimal-to-binary conversion of a very long string of 130341825Sdim * digits. When converting IEEE double precision values, the 131341825Sdim * longest string gdtoa can return is about 751 bytes long. For 132341825Sdim * conversions by strtod of strings of 800 digits and all gdtoa 133341825Sdim * conversions of IEEE doubles in single-threaded executions with 134341825Sdim * 8-byte pointers, PRIVATE_MEM >= 7400 appears to suffice; with 135341825Sdim * 4-byte pointers, PRIVATE_MEM >= 7112 appears adequate. 136341825Sdim * #define INFNAN_CHECK on IEEE systems to cause strtod to check for 137341825Sdim * Infinity and NaN (case insensitively). On some systems (e.g., 138341825Sdim * some HP systems), it may be necessary to #define NAN_WORD0 139341825Sdim * appropriately -- to the most significant word of a quiet NaN. 140341825Sdim * (On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.) 141341825Sdim * When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined, 142341825Sdim * strtodg also accepts (case insensitively) strings of the form 143341825Sdim * NaN(x), where x is a string of hexadecimal digits and spaces; 144341825Sdim * if there is only one string of hexadecimal digits, it is taken 145341825Sdim * for the fraction bits of the resulting NaN; if there are two or 146341825Sdim * more strings of hexadecimal digits, each string is assigned 147341825Sdim * to the next available sequence of 32-bit words of fractions 148341825Sdim * bits (starting with the most significant), right-aligned in 149341825Sdim * each sequence. 150341825Sdim * #define MULTIPLE_THREADS if the system offers preemptively scheduled 151341825Sdim * multiple threads. In this case, you must provide (or suitably 152341825Sdim * #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed 153341825Sdim * by FREE_DTOA_LOCK(n) for n = 0 or 1. (The second lock, accessed 154341825Sdim * in pow5mult, ensures lazy evaluation of only one copy of high 155341825Sdim * powers of 5; omitting this lock would introduce a small 156341825Sdim * probability of wasting memory, but would otherwise be harmless.) 157341825Sdim * You must also invoke freedtoa(s) to free the value s returned by 158341825Sdim * dtoa. You may do so whether or not MULTIPLE_THREADS is #defined. 159218887Sdim * #define IMPRECISE_INEXACT if you do not care about the setting of 160218887Sdim * the STRTOG_Inexact bits in the special case of doing IEEE double 161234353Sdim * precision conversions (which could also be done by the strtog in 162218887Sdim * dtoa.c). 163218887Sdim * #define NO_HEX_FP to disable recognition of C9x's hexadecimal 164218887Sdim * floating-point constants. 165218887Sdim * #define -DNO_ERRNO to suppress setting errno (in strtod.c and 166 * strtodg.c). 167 * #define NO_STRING_H to use private versions of memcpy. 168 * On some K&R systems, it may also be necessary to 169 * #define DECLARE_SIZE_T in this case. 170 * #define YES_ALIAS to permit aliasing certain double values with 171 * arrays of ULongs. This leads to slightly better code with 172 * some compilers and was always used prior to 19990916, but it 173 * is not strictly legal and can cause trouble with aggressively 174 * optimizing compilers (e.g., gcc 2.95.1 under -O2). 175 * #define USE_LOCALE to use the current locale's decimal_point value. 176 */ 177 178#ifndef GDTOAIMP_H_INCLUDED 179#define GDTOAIMP_H_INCLUDED 180#include "gdtoa.h" 181 182#ifdef DEBUG 183#include "stdio.h" 184#define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);} 185#endif 186 187#include "limits.h" 188#include "stdlib.h" 189#include "string.h" 190#include "libc_private.h" 191#include "spinlock.h" 192 193#ifdef KR_headers 194#define Char char 195#else 196#define Char void 197#endif 198 199#ifdef MALLOC 200extern Char *MALLOC ANSI((size_t)); 201#else 202#define MALLOC malloc 203#endif 204 205#define INFNAN_CHECK 206#define USE_LOCALE 207 208#undef IEEE_Arith 209#undef Avoid_Underflow 210#ifdef IEEE_MC68k 211#define IEEE_Arith 212#endif 213#ifdef IEEE_8087 214#define IEEE_Arith 215#endif 216 217#include "errno.h" 218#ifdef Bad_float_h 219 220#ifdef IEEE_Arith 221#define DBL_DIG 15 222#define DBL_MAX_10_EXP 308 223#define DBL_MAX_EXP 1024 224#define FLT_RADIX 2 225#define DBL_MAX 1.7976931348623157e+308 226#endif 227 228#ifdef IBM 229#define DBL_DIG 16 230#define DBL_MAX_10_EXP 75 231#define DBL_MAX_EXP 63 232#define FLT_RADIX 16 233#define DBL_MAX 7.2370055773322621e+75 234#endif 235 236#ifdef VAX 237#define DBL_DIG 16 238#define DBL_MAX_10_EXP 38 239#define DBL_MAX_EXP 127 240#define FLT_RADIX 2 241#define DBL_MAX 1.7014118346046923e+38 242#define n_bigtens 2 243#endif 244 245#ifndef LONG_MAX 246#define LONG_MAX 2147483647 247#endif 248 249#else /* ifndef Bad_float_h */ 250#include "float.h" 251#endif /* Bad_float_h */ 252 253#ifdef IEEE_Arith 254#define Scale_Bit 0x10 255#define n_bigtens 5 256#endif 257 258#ifdef IBM 259#define n_bigtens 3 260#endif 261 262#ifdef VAX 263#define n_bigtens 2 264#endif 265 266#ifndef __MATH_H__ 267#include "math.h" 268#endif 269 270#ifdef __cplusplus 271extern "C" { 272#endif 273 274#if defined(IEEE_8087) + defined(IEEE_MC68k) + defined(VAX) + defined(IBM) != 1 275Exactly one of IEEE_8087, IEEE_MC68k, VAX, or IBM should be defined. 276#endif 277 278typedef union { double d; ULong L[2]; } U; 279 280#ifdef YES_ALIAS 281#define dval(x) x 282#ifdef IEEE_8087 283#define word0(x) ((ULong *)&x)[1] 284#define word1(x) ((ULong *)&x)[0] 285#else 286#define word0(x) ((ULong *)&x)[0] 287#define word1(x) ((ULong *)&x)[1] 288#endif 289#else /* !YES_ALIAS */ 290#ifdef IEEE_8087 291#define word0(x) ((U*)&x)->L[1] 292#define word1(x) ((U*)&x)->L[0] 293#else 294#define word0(x) ((U*)&x)->L[0] 295#define word1(x) ((U*)&x)->L[1] 296#endif 297#define dval(x) ((U*)&x)->d 298#endif /* YES_ALIAS */ 299 300/* The following definition of Storeinc is appropriate for MIPS processors. 301 * An alternative that might be better on some machines is 302 * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff) 303 */ 304#if defined(IEEE_8087) + defined(VAX) 305#define Storeinc(a,b,c) (((unsigned short *)a)[1] = (unsigned short)b, \ 306((unsigned short *)a)[0] = (unsigned short)c, a++) 307#else 308#define Storeinc(a,b,c) (((unsigned short *)a)[0] = (unsigned short)b, \ 309((unsigned short *)a)[1] = (unsigned short)c, a++) 310#endif 311 312/* #define P DBL_MANT_DIG */ 313/* Ten_pmax = floor(P*log(2)/log(5)) */ 314/* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */ 315/* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */ 316/* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */ 317 318#ifdef IEEE_Arith 319#define Exp_shift 20 320#define Exp_shift1 20 321#define Exp_msk1 0x100000 322#define Exp_msk11 0x100000 323#define Exp_mask 0x7ff00000 324#define P 53 325#define Bias 1023 326#define Emin (-1022) 327#define Exp_1 0x3ff00000 328#define Exp_11 0x3ff00000 329#define Ebits 11 330#define Frac_mask 0xfffff 331#define Frac_mask1 0xfffff 332#define Ten_pmax 22 333#define Bletch 0x10 334#define Bndry_mask 0xfffff 335#define Bndry_mask1 0xfffff 336#define LSB 1 337#define Sign_bit 0x80000000 338#define Log2P 1 339#define Tiny0 0 340#define Tiny1 1 341#define Quick_max 14 342#define Int_max 14 343 344#ifndef Flt_Rounds 345#ifdef FLT_ROUNDS 346#define Flt_Rounds FLT_ROUNDS 347#else 348#define Flt_Rounds 1 349#endif 350#endif /*Flt_Rounds*/ 351 352#else /* ifndef IEEE_Arith */ 353#undef Sudden_Underflow 354#define Sudden_Underflow 355#ifdef IBM 356#undef Flt_Rounds 357#define Flt_Rounds 0 358#define Exp_shift 24 359#define Exp_shift1 24 360#define Exp_msk1 0x1000000 361#define Exp_msk11 0x1000000 362#define Exp_mask 0x7f000000 363#define P 14 364#define Bias 65 365#define Exp_1 0x41000000 366#define Exp_11 0x41000000 367#define Ebits 8 /* exponent has 7 bits, but 8 is the right value in b2d */ 368#define Frac_mask 0xffffff 369#define Frac_mask1 0xffffff 370#define Bletch 4 371#define Ten_pmax 22 372#define Bndry_mask 0xefffff 373#define Bndry_mask1 0xffffff 374#define LSB 1 375#define Sign_bit 0x80000000 376#define Log2P 4 377#define Tiny0 0x100000 378#define Tiny1 0 379#define Quick_max 14 380#define Int_max 15 381#else /* VAX */ 382#undef Flt_Rounds 383#define Flt_Rounds 1 384#define Exp_shift 23 385#define Exp_shift1 7 386#define Exp_msk1 0x80 387#define Exp_msk11 0x800000 388#define Exp_mask 0x7f80 389#define P 56 390#define Bias 129 391#define Exp_1 0x40800000 392#define Exp_11 0x4080 393#define Ebits 8 394#define Frac_mask 0x7fffff 395#define Frac_mask1 0xffff007f 396#define Ten_pmax 24 397#define Bletch 2 398#define Bndry_mask 0xffff007f 399#define Bndry_mask1 0xffff007f 400#define LSB 0x10000 401#define Sign_bit 0x8000 402#define Log2P 1 403#define Tiny0 0x80 404#define Tiny1 0 405#define Quick_max 15 406#define Int_max 15 407#endif /* IBM, VAX */ 408#endif /* IEEE_Arith */ 409 410#ifndef IEEE_Arith 411#define ROUND_BIASED 412#endif 413 414#ifdef RND_PRODQUOT 415#define rounded_product(a,b) a = rnd_prod(a, b) 416#define rounded_quotient(a,b) a = rnd_quot(a, b) 417#ifdef KR_headers 418extern double rnd_prod(), rnd_quot(); 419#else 420extern double rnd_prod(double, double), rnd_quot(double, double); 421#endif 422#else 423#define rounded_product(a,b) a *= b 424#define rounded_quotient(a,b) a /= b 425#endif 426 427#define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1)) 428#define Big1 0xffffffff 429 430#undef Pack_16 431#ifndef Pack_32 432#define Pack_32 433#endif 434 435#ifdef NO_LONG_LONG 436#undef ULLong 437#ifdef Just_16 438#undef Pack_32 439#define Pack_16 440/* When Pack_32 is not defined, we store 16 bits per 32-bit Long. 441 * This makes some inner loops simpler and sometimes saves work 442 * during multiplications, but it often seems to make things slightly 443 * slower. Hence the default is now to store 32 bits per Long. 444 */ 445#endif 446#else /* long long available */ 447#ifndef Llong 448#define Llong long long 449#endif 450#ifndef ULLong 451#define ULLong unsigned Llong 452#endif 453#endif /* NO_LONG_LONG */ 454 455#ifdef Pack_32 456#define ULbits 32 457#define kshift 5 458#define kmask 31 459#define ALL_ON 0xffffffff 460#else 461#define ULbits 16 462#define kshift 4 463#define kmask 15 464#define ALL_ON 0xffff 465#endif 466 467#define MULTIPLE_THREADS 468extern spinlock_t __gdtoa_locks[2]; 469#define ACQUIRE_DTOA_LOCK(n) do { \ 470 if (__isthreaded) \ 471 _SPINLOCK(&__gdtoa_locks[n]); \ 472} while(0) 473#define FREE_DTOA_LOCK(n) do { \ 474 if (__isthreaded) \ 475 _SPINUNLOCK(&__gdtoa_locks[n]); \ 476} while(0) 477 478#define Kmax 15 479 480 struct 481Bigint { 482 struct Bigint *next; 483 int k, maxwds, sign, wds; 484 ULong x[1]; 485 }; 486 487 typedef struct Bigint Bigint; 488 489#ifdef NO_STRING_H 490#ifdef DECLARE_SIZE_T 491typedef unsigned int size_t; 492#endif 493extern void memcpy_D2A ANSI((void*, const void*, size_t)); 494#define Bcopy(x,y) memcpy_D2A(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int)) 495#else /* !NO_STRING_H */ 496#define Bcopy(x,y) memcpy(&x->sign,&y->sign,y->wds*sizeof(ULong) + 2*sizeof(int)) 497#endif /* NO_STRING_H */ 498 499/* 500 * Paranoia: Protect exported symbols, including ones in files we don't 501 * compile right now. The standard strtof and strtod survive. 502 */ 503#define dtoa __dtoa 504#define gdtoa __gdtoa 505#define freedtoa __freedtoa 506#define strtodg __strtodg 507#define g_ddfmt __g_ddfmt 508#define g_dfmt __g_dfmt 509#define g_ffmt __g_ffmt 510#define g_Qfmt __g_Qfmt 511#define g_xfmt __g_xfmt 512#define g_xLfmt __g_xLfmt 513#define strtoId __strtoId 514#define strtoIdd __strtoIdd 515#define strtoIf __strtoIf 516#define strtoIQ __strtoIQ 517#define strtoIx __strtoIx 518#define strtoIxL __strtoIxL 519#define strtord __strtord 520#define strtordd __strtordd 521#define strtorf __strtorf 522#define strtorQ __strtorQ 523#define strtorx __strtorx 524#define strtorxL __strtorxL 525#define strtodI __strtodI 526#define strtopd __strtopd 527#define strtopdd __strtopdd 528#define strtopf __strtopf 529#define strtopQ __strtopQ 530#define strtopx __strtopx 531#define strtopxL __strtopxL 532 533/* Protect gdtoa-internal symbols */ 534#define Balloc __Balloc_D2A 535#define Bfree __Bfree_D2A 536#define ULtoQ __ULtoQ_D2A 537#define ULtof __ULtof_D2A 538#define ULtod __ULtod_D2A 539#define ULtodd __ULtodd_D2A 540#define ULtox __ULtox_D2A 541#define ULtoxL __ULtoxL_D2A 542#define any_on __any_on_D2A 543#define b2d __b2d_D2A 544#define bigtens __bigtens_D2A 545#define cmp __cmp_D2A 546#define copybits __copybits_D2A 547#define d2b __d2b_D2A 548#define decrement __decrement_D2A 549#define diff __diff_D2A 550#define dtoa_result __dtoa_result_D2A 551#define g__fmt __g__fmt_D2A 552#define gethex __gethex_D2A 553#define hexdig __hexdig_D2A 554#define hexdig_init_D2A __hexdig_init_D2A 555#define hexnan __hexnan_D2A 556#define hi0bits __hi0bits_D2A 557#define i2b __i2b_D2A 558#define increment __increment_D2A 559#define lo0bits __lo0bits_D2A 560#define lshift __lshift_D2A 561#define match __match_D2A 562#define mult __mult_D2A 563#define multadd __multadd_D2A 564#define nrv_alloc __nrv_alloc_D2A 565#define pow5mult __pow5mult_D2A 566#define quorem __quorem_D2A 567#define ratio __ratio_D2A 568#define rshift __rshift_D2A 569#define rv_alloc __rv_alloc_D2A 570#define s2b __s2b_D2A 571#define set_ones __set_ones_D2A 572#define strcp __strcp_D2A 573#define strcp_D2A __strcp_D2A 574#define strtoIg __strtoIg_D2A 575#define sum __sum_D2A 576#define tens __tens_D2A 577#define tinytens __tinytens_D2A 578#define tinytens __tinytens_D2A 579#define trailz __trailz_D2A 580#define ulp __ulp_D2A 581 582 extern char *dtoa_result; 583 extern CONST double bigtens[], tens[], tinytens[]; 584 extern unsigned char hexdig[]; 585 586 extern Bigint *Balloc ANSI((int)); 587 extern void Bfree ANSI((Bigint*)); 588 extern void ULtof ANSI((ULong*, ULong*, Long, int)); 589 extern void ULtod ANSI((ULong*, ULong*, Long, int)); 590 extern void ULtodd ANSI((ULong*, ULong*, Long, int)); 591 extern void ULtoQ ANSI((ULong*, ULong*, Long, int)); 592 extern void ULtox ANSI((UShort*, ULong*, Long, int)); 593 extern void ULtoxL ANSI((ULong*, ULong*, Long, int)); 594 extern ULong any_on ANSI((Bigint*, int)); 595 extern double b2d ANSI((Bigint*, int*)); 596 extern int cmp ANSI((Bigint*, Bigint*)); 597 extern void copybits ANSI((ULong*, int, Bigint*)); 598 extern Bigint *d2b ANSI((double, int*, int*)); 599 extern int decrement ANSI((Bigint*)); 600 extern Bigint *diff ANSI((Bigint*, Bigint*)); 601 extern char *dtoa ANSI((double d, int mode, int ndigits, 602 int *decpt, int *sign, char **rve)); 603 extern char *g__fmt ANSI((char*, char*, char*, int, ULong)); 604 extern int gethex ANSI((CONST char**, FPI*, Long*, Bigint**, int)); 605 extern void hexdig_init_D2A(Void); 606 extern int hexnan ANSI((CONST char**, FPI*, ULong*)); 607 extern int hi0bits ANSI((ULong)); 608 extern Bigint *i2b ANSI((int)); 609 extern Bigint *increment ANSI((Bigint*)); 610 extern int lo0bits ANSI((ULong*)); 611 extern Bigint *lshift ANSI((Bigint*, int)); 612 extern int match ANSI((CONST char**, char*)); 613 extern Bigint *mult ANSI((Bigint*, Bigint*)); 614 extern Bigint *multadd ANSI((Bigint*, int, int)); 615 extern char *nrv_alloc ANSI((char*, char **, int)); 616 extern Bigint *pow5mult ANSI((Bigint*, int)); 617 extern int quorem ANSI((Bigint*, Bigint*)); 618 extern double ratio ANSI((Bigint*, Bigint*)); 619 extern void rshift ANSI((Bigint*, int)); 620 extern char *rv_alloc ANSI((int)); 621 extern Bigint *s2b ANSI((CONST char*, int, int, ULong)); 622 extern Bigint *set_ones ANSI((Bigint*, int)); 623 extern char *strcp ANSI((char*, const char*)); 624 extern int strtoIg ANSI((CONST char*, char**, FPI*, Long*, Bigint**, int*)); 625 extern double strtod ANSI((const char *s00, char **se)); 626 extern Bigint *sum ANSI((Bigint*, Bigint*)); 627 extern int trailz ANSI((Bigint*)); 628 extern double ulp ANSI((double)); 629 630#ifdef __cplusplus 631} 632#endif 633 634 635#ifdef IEEE_Arith 636#ifdef IEEE_MC68k 637#define _0 0 638#define _1 1 639#else 640#define _0 1 641#define _1 0 642#endif 643#else 644#undef INFNAN_CHECK 645#endif 646 647#ifdef INFNAN_CHECK 648 649#ifndef NAN_WORD0 650#define NAN_WORD0 0x7ff80000 651#endif 652 653#ifndef NAN_WORD1 654#define NAN_WORD1 0 655#endif 656#endif /* INFNAN_CHECK */ 657 658#undef SI 659#ifdef Sudden_Underflow 660#define SI 1 661#else 662#define SI 0 663#endif 664 665#endif /* GDTOAIMP_H_INCLUDED */ 666