contrib/gdtoa/gdtoa.h

   1 /****************************************************************
   2
   3 The author of this software is David M. Gay.
   4
   5 Copyright (C) 1998 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 /* Please send bug reports to David M. Gay (dmg at acm dot org,
  30  * with " at " changed at "@" and " dot " changed to ".").      */
  31
  32 #ifndef GDTOA_H_INCLUDED
  33 #define GDTOA_H_INCLUDED
  34
  35 #include "arith.h"
  36 #include <stddef.h> /* for size_t */
  37
  38 #ifndef Long
  39 #define Long int
  40 #endif
  41 #ifndef ULong
  42 typedef unsigned Long ULong;
  43 #endif
  44 #ifndef UShort
  45 typedef unsigned short UShort;
  46 #endif
  47
  48 #ifndef ANSI
  49 #ifdef KR_headers
  50 #define ANSI(x) ()
  51 #define Void /*nothing*/
  52 #else
  53 #define ANSI(x) x
  54 #define Void void
  55 #endif
  56 #endif /* ANSI */
  57
  58 #ifndef CONST
  59 #ifdef KR_headers
  60 #define CONST /* blank */
  61 #else
  62 #define CONST const
  63 #endif
  64 #endif /* CONST */
  65
  66  enum { /* return values from strtodg */
  67         STRTOG_Zero     = 0,
  68         STRTOG_Normal   = 1,
  69         STRTOG_Denormal = 2,
  70         STRTOG_Infinite = 3,
  71         STRTOG_NaN      = 4,
  72         STRTOG_NaNbits  = 5,
  73         STRTOG_NoNumber = 6,
  74         STRTOG_Retmask  = 7,
  75
  76         /* The following may be or-ed into one of the above values. */
  77
  78         STRTOG_Neg      = 0x08, /* does not affect STRTOG_Inexlo or STRTOG_Inexhi */
  79         STRTOG_Inexlo   = 0x10, /* returned result rounded toward zero */
  80         STRTOG_Inexhi   = 0x20, /* returned result rounded away from zero */
  81         STRTOG_Inexact  = 0x30,
  82         STRTOG_Underflow= 0x40,
  83         STRTOG_Overflow = 0x80
  84         };
  85
  86  typedef struct
  87 FPI {
  88         int nbits;
  89         int emin;
  90         int emax;
  91         int rounding;
  92         int sudden_underflow;
  93         } FPI;
  94
  95 enum {  /* FPI.rounding values: same as FLT_ROUNDS */
  96         FPI_Round_zero = 0,
  97         FPI_Round_near = 1,
  98         FPI_Round_up = 2,
  99         FPI_Round_down = 3
 100         };
 101
 102 #ifdef __cplusplus
 103 extern "C" {
 104 #endif
 105
 106 extern char* dtoa  ANSI((double d, int mode, int ndigits, int *decpt,
 107                         int *sign, char **rve));
 108 extern char* gdtoa ANSI((FPI *fpi, int be, ULong *bits, int *kindp,
 109                         int mode, int ndigits, int *decpt, char **rve));
 110 extern void freedtoa ANSI((char*));
 111 extern float  strtof ANSI((CONST char *, char **));
 112 extern double strtod ANSI((CONST char *, char **));
 113 extern int strtodg ANSI((CONST char*, char**, FPI*, Long*, ULong*));
 114
 115 extern char*    g_ddfmt  ANSI((char*, double*, int, size_t));
 116 extern char*    g_dfmt   ANSI((char*, double*, int, size_t));
 117 extern char*    g_ffmt   ANSI((char*, float*,  int, size_t));
 118 extern char*    g_Qfmt   ANSI((char*, void*,   int, size_t));
 119 extern char*    g_xfmt   ANSI((char*, void*,   int, size_t));
 120 extern char*    g_xLfmt  ANSI((char*, void*,   int, size_t));
 121
 122 extern int      strtoId  ANSI((CONST char*, char**, double*, double*));
 123 extern int      strtoIdd ANSI((CONST char*, char**, double*, double*));
 124 extern int      strtoIf  ANSI((CONST char*, char**, float*, float*));
 125 extern int      strtoIQ  ANSI((CONST char*, char**, void*, void*));
 126 extern int      strtoIx  ANSI((CONST char*, char**, void*, void*));
 127 extern int      strtoIxL ANSI((CONST char*, char**, void*, void*));
 128 extern int      strtord  ANSI((CONST char*, char**, int, double*));
 129 extern int      strtordd ANSI((CONST char*, char**, int, double*));
 130 extern int      strtorf  ANSI((CONST char*, char**, int, float*));
 131 extern int      strtorQ  ANSI((CONST char*, char**, int, void*));
 132 extern int      strtorx  ANSI((CONST char*, char**, int, void*));
 133 extern int      strtorxL ANSI((CONST char*, char**, int, void*));
 134 #if 1
 135 extern int      strtodI  ANSI((CONST char*, char**, double*));
 136 extern int      strtopd  ANSI((CONST char*, char**, double*));
 137 extern int      strtopdd ANSI((CONST char*, char**, double*));
 138 extern int      strtopf  ANSI((CONST char*, char**, float*));
 139 extern int      strtopQ  ANSI((CONST char*, char**, void*));
 140 extern int      strtopx  ANSI((CONST char*, char**, void*));
 141 extern int      strtopxL ANSI((CONST char*, char**, void*));
 142 #else
 143 #define strtopd(s,se,x) strtord(s,se,1,x)
 144 #define strtopdd(s,se,x) strtordd(s,se,1,x)
 145 #define strtopf(s,se,x) strtorf(s,se,1,x)
 146 #define strtopQ(s,se,x) strtorQ(s,se,1,x)
 147 #define strtopx(s,se,x) strtorx(s,se,1,x)
 148 #define strtopxL(s,se,x) strtorxL(s,se,1,x)
 149 #endif
 150
 151 #ifdef __cplusplus
 152 }
 153 #endif
 154 #endif /* GDTOA_H_INCLUDED */