libguile/numbers.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_NUMBERS_H
   4 #define SCM_NUMBERS_H
   5
   6 /* Copyright (C) 1995,1996,1998,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22
  23 \f
  24
  25 #include "libguile/__scm.h"
  26 #include "libguile/print.h"
  27
  28 #if SCM_HAVE_FLOATINGPOINT_H
  29 # include <floatingpoint.h>
  30 #endif
  31
  32 #if SCM_HAVE_IEEEFP_H
  33 # include <ieeefp.h>
  34 #endif
  35
  36 #if SCM_HAVE_NAN_H
  37 # if defined (SCO)
  38 #   define _IEEE 1
  39 # endif
  40 # include <nan.h>
  41 # if defined (SCO)
  42 #   undef _IEEE
  43 # endif
  44 #endif /* SCM_HAVE_NAN_H */
  45
  46 \f
  47
  48 /* Immediate Numbers, also known as fixnums
  49  *
  50  * Inums are exact integer data that fits within an SCM word.  */
  51
  52 /* SCM_T_SIGNED_MAX is                 (- (expt 2 n) 1),
  53  * SCM_MOST_POSITIVE_FIXNUM should be  (- (expt 2 (- n 2)) 1)
  54  * which is the same as                (/ (- (expt 2 n) 4) 4)
  55  */
  56
  57 #define SCM_I_FIXNUM_BIT         (SCM_LONG_BIT - 2)
  58 #define SCM_MOST_POSITIVE_FIXNUM ((SCM_T_SIGNED_BITS_MAX-3)/4)
  59 #define SCM_MOST_NEGATIVE_FIXNUM (-SCM_MOST_POSITIVE_FIXNUM-1)
  60
  61 /* SCM_SRS is signed right shift */
  62 #if (-1 == (((-1) << 2) + 2) >> 2)
  63 # define SCM_SRS(x, y) ((x) >> (y))
  64 #else
  65 # define SCM_SRS(x, y) ((x) < 0 ? ~((~(x)) >> (y)) : ((x) >> (y)))
  66 #endif /* (-1 == (((-1) << 2) + 2) >> 2) */
  67
  68
  69 #define SCM_I_INUMP(x)  (2 & SCM_UNPACK (x))
  70 #define SCM_I_NINUMP(x) (!SCM_I_INUMP (x))
  71 #define SCM_I_MAKINUM(x) \
  72   (SCM_PACK ((((scm_t_signed_bits) (x)) << 2) + scm_tc2_int))
  73 #define SCM_I_INUM(x)   (SCM_SRS ((scm_t_signed_bits) SCM_UNPACK (x), 2))
  74
  75 /* SCM_FIXABLE is true if its long argument can be encoded in an SCM_INUM. */
  76 #define SCM_POSFIXABLE(n) ((n) <= SCM_MOST_POSITIVE_FIXNUM)
  77 #define SCM_NEGFIXABLE(n) ((n) >= SCM_MOST_NEGATIVE_FIXNUM)
  78 #define SCM_FIXABLE(n) (SCM_POSFIXABLE (n) && SCM_NEGFIXABLE (n))
  79
  80
  81 /* A name for 0. */
  82 #define SCM_INUM0 (SCM_I_MAKINUM (0))
  83
  84 /* SCM_MAXEXP is the maximum double precision exponent
  85  * SCM_FLTMAX is less than or scm_equal the largest single precision float
  86  */
  87
  88 #if SCM_HAVE_STDC_HEADERS
  89 # ifndef GO32
  90 #  include <float.h>
  91 #  ifdef __MINGW32__
  92 #   define copysign _copysign
  93 #   define isnan _isnan
  94 #   define finite _finite
  95 #  endif /* __MINGW32__ */
  96 # endif /* ndef GO32 */
  97 #endif /* def STDC_HEADERS */
  98
  99 #ifdef DBL_MAX_10_EXP
 100 # define SCM_MAXEXP DBL_MAX_10_EXP
 101 #else
 102 # define SCM_MAXEXP 308         /* IEEE doubles */
 103 #endif /* def DBL_MAX_10_EXP */
 104
 105 #ifdef FLT_MAX
 106 # define SCM_FLTMAX FLT_MAX
 107 #else
 108 # define SCM_FLTMAX 1e+23
 109 #endif /* def FLT_MAX */
 110
 111
 112 /* SCM_INTBUFLEN is the maximum number of characters neccessary for the
 113  * printed or scm_string representation of an exact immediate.
 114  */
 115 #define SCM_INTBUFLEN (5 + SCM_LONG_BIT)
 116
 117 \f
 118
 119 /* Numbers
 120  */
 121
 122
 123 /* Note that scm_tc16_real and scm_tc16_complex are given tc16-codes that only
 124  * differ in one bit: This way, checking if an object is an inexact number can
 125  * be done quickly (using the TYP16S macro).  */
 126
 127 /* Number subtype 1 to 3 (note the dependency on the predicates SCM_INEXACTP
 128  * and SCM_NUMP)  */
 129 #define scm_tc16_big            (scm_tc7_number + 1 * 256L)
 130 #define scm_tc16_real           (scm_tc7_number + 2 * 256L)
 131 #define scm_tc16_complex        (scm_tc7_number + 3 * 256L)
 132 #define scm_tc16_fraction       (scm_tc7_number + 4 * 256L)
 133
 134 #define SCM_INEXACTP(x) \
 135   (!SCM_IMP (x) && (0xfeff & SCM_CELL_TYPE (x)) == scm_tc16_real)
 136 #define SCM_REALP(x) (!SCM_IMP (x) && SCM_TYP16 (x) == scm_tc16_real)
 137 #define SCM_COMPLEXP(x) (!SCM_IMP (x) && SCM_TYP16 (x) == scm_tc16_complex)
 138
 139 #define SCM_REAL_VALUE(x) (((scm_t_double *) SCM2PTR (x))->real)
 140 #define SCM_COMPLEX_MEM(x) ((scm_t_complex *) SCM_CELL_WORD_1 (x))
 141 #define SCM_COMPLEX_REAL(x) (SCM_COMPLEX_MEM (x)->real)
 142 #define SCM_COMPLEX_IMAG(x) (SCM_COMPLEX_MEM (x)->imag)
 143
 144 /* Each bignum is just an mpz_t stored in a double cell starting at word 1. */
 145 #define SCM_I_BIG_MPZ(x) (*((mpz_t *) (SCM_CELL_OBJECT_LOC((x),1))))
 146 #define SCM_BIGP(x) (!SCM_IMP (x) && SCM_TYP16 (x) == scm_tc16_big)
 147
 148 #define SCM_NUMBERP(x) (SCM_I_INUMP(x) || SCM_NUMP(x))
 149 #define SCM_NUMP(x) (!SCM_IMP(x) \
 150   && (((0xfcff & SCM_CELL_TYPE (x)) == scm_tc7_number) \
 151       || ((0xfbff & SCM_CELL_TYPE (x)) == scm_tc7_number)))
 152 /* 0xfcff (#b1100) for 0 free, 1 big, 2 real, 3 complex, then 0xfbff (#b1011) for 4 fraction */
 153
 154 #define SCM_FRACTIONP(x) (!SCM_IMP (x) && SCM_TYP16 (x) == scm_tc16_fraction)
 155 #define SCM_FRACTION_NUMERATOR(x) (SCM_CELL_OBJECT_1 (x))
 156 #define SCM_FRACTION_DENOMINATOR(x) (SCM_CELL_OBJECT_2 (x))
 157 #define SCM_FRACTION_SET_NUMERATOR(x, v) (SCM_SET_CELL_OBJECT_1 ((x), (v)))
 158 #define SCM_FRACTION_SET_DENOMINATOR(x, v) (SCM_SET_CELL_OBJECT_2 ((x), (v)))
 159
 160   /* I think the left half word is free in the type, so I'll use bit 17 */
 161 #define SCM_FRACTION_REDUCED_BIT 0x10000
 162 #define SCM_FRACTION_REDUCED_SET(x) (SCM_SET_CELL_TYPE((x), (SCM_CELL_TYPE (x) | SCM_FRACTION_REDUCED_BIT)))
 163 #define SCM_FRACTION_REDUCED_CLEAR(x) (SCM_SET_CELL_TYPE((x), (SCM_CELL_TYPE (x) & ~SCM_FRACTION_REDUCED_BIT)))
 164 #define SCM_FRACTION_REDUCED(x)     (0x10000 & SCM_CELL_TYPE (x))
 165
 166 \f
 167
 168 typedef struct scm_t_double
 169 {
 170   SCM type;
 171   SCM pad;
 172   double real;
 173 } scm_t_double;
 174
 175 typedef struct scm_t_complex
 176 {
 177   double real;
 178   double imag;
 179 } scm_t_complex;
 180
 181 \f
 182
 183 SCM_API SCM scm_exact_p (SCM x);
 184 SCM_API SCM scm_odd_p (SCM n);
 185 SCM_API SCM scm_even_p (SCM n);
 186 SCM_API SCM scm_inf_p (SCM n);
 187 SCM_API SCM scm_nan_p (SCM n);
 188 SCM_API SCM scm_inf (void);
 189 SCM_API SCM scm_nan (void);
 190 SCM_API SCM scm_abs (SCM x);
 191 SCM_API SCM scm_quotient (SCM x, SCM y);
 192 SCM_API SCM scm_remainder (SCM x, SCM y);
 193 SCM_API SCM scm_modulo (SCM x, SCM y);
 194 SCM_API SCM scm_gcd (SCM x, SCM y);
 195 SCM_API SCM scm_lcm (SCM n1, SCM n2);
 196 SCM_API SCM scm_logand (SCM n1, SCM n2);
 197 SCM_API SCM scm_logior (SCM n1, SCM n2);
 198 SCM_API SCM scm_logxor (SCM n1, SCM n2);
 199 SCM_API SCM scm_logtest (SCM n1, SCM n2);
 200 SCM_API SCM scm_logbit_p (SCM n1, SCM n2);
 201 SCM_API SCM scm_lognot (SCM n);
 202 SCM_API SCM scm_modulo_expt (SCM n, SCM k, SCM m);
 203 SCM_API SCM scm_integer_expt (SCM z1, SCM z2);
 204 SCM_API SCM scm_ash (SCM n, SCM cnt);
 205 SCM_API SCM scm_bit_extract (SCM n, SCM start, SCM end);
 206 SCM_API SCM scm_logcount (SCM n);
 207 SCM_API SCM scm_integer_length (SCM n);
 208
 209 SCM_API size_t scm_iint2str (long num, int rad, char *p);
 210 SCM_API SCM scm_number_to_string (SCM x, SCM radix);
 211 SCM_API int scm_print_real (SCM sexp, SCM port, scm_print_state *pstate);
 212 SCM_API int scm_print_complex (SCM sexp, SCM port, scm_print_state *pstate);
 213 SCM_API int scm_bigprint (SCM exp, SCM port, scm_print_state *pstate);
 214 SCM_API SCM scm_i_mem2number (const char *mem, size_t len, unsigned int radix);
 215 SCM_API SCM scm_string_to_number (SCM str, SCM radix);
 216 SCM_API SCM scm_make_real (double x);
 217 SCM_API SCM scm_make_complex (double x, double y);
 218 SCM_API SCM scm_bigequal (SCM x, SCM y);
 219 SCM_API SCM scm_real_equalp (SCM x, SCM y);
 220 SCM_API SCM scm_complex_equalp (SCM x, SCM y);
 221 SCM_API SCM scm_number_p (SCM x);
 222 SCM_API SCM scm_real_p (SCM x);
 223 SCM_API SCM scm_integer_p (SCM x);
 224 SCM_API SCM scm_inexact_p (SCM x);
 225 SCM_API SCM scm_num_eq_p (SCM x, SCM y);
 226 SCM_API SCM scm_less_p (SCM x, SCM y);
 227 SCM_API SCM scm_gr_p (SCM x, SCM y);
 228 SCM_API SCM scm_leq_p (SCM x, SCM y);
 229 SCM_API SCM scm_geq_p (SCM x, SCM y);
 230 SCM_API SCM scm_zero_p (SCM z);
 231 SCM_API SCM scm_positive_p (SCM x);
 232 SCM_API SCM scm_negative_p (SCM x);
 233 SCM_API SCM scm_max (SCM x, SCM y);
 234 SCM_API SCM scm_min (SCM x, SCM y);
 235 SCM_API SCM scm_sum (SCM x, SCM y);
 236 SCM_API SCM scm_difference (SCM x, SCM y);
 237 SCM_API SCM scm_product (SCM x, SCM y);
 238 SCM_API double scm_num2dbl (SCM a, const char * why);
 239 SCM_API SCM scm_divide (SCM x, SCM y);
 240 SCM_API SCM scm_floor (SCM x);
 241 SCM_API SCM scm_ceiling (SCM x);
 242 SCM_API double scm_asinh (double x);
 243 SCM_API double scm_acosh (double x);
 244 SCM_API double scm_atanh (double x);
 245 SCM_API double scm_truncate (double x);
 246 SCM_API double scm_round (double x);
 247 SCM_API SCM scm_truncate_number (SCM x);
 248 SCM_API SCM scm_round_number (SCM x);
 249 SCM_API SCM scm_sys_expt (SCM z1, SCM z2);
 250 SCM_API SCM scm_sys_atan2 (SCM z1, SCM z2);
 251 SCM_API SCM scm_make_rectangular (SCM z1, SCM z2);
 252 SCM_API SCM scm_make_polar (SCM z1, SCM z2);
 253 SCM_API SCM scm_real_part (SCM z);
 254 SCM_API SCM scm_imag_part (SCM z);
 255 SCM_API SCM scm_magnitude (SCM z);
 256 SCM_API SCM scm_angle (SCM z);
 257 SCM_API SCM scm_exact_to_inexact (SCM z);
 258 SCM_API SCM scm_inexact_to_exact (SCM z);
 259 SCM_API SCM scm_trunc (SCM x);
 260
 261 SCM_API SCM scm_short2num (short n);
 262 SCM_API SCM scm_ushort2num (unsigned short n);
 263 SCM_API SCM scm_int2num (int n);
 264 SCM_API SCM scm_uint2num (unsigned int n);
 265 SCM_API SCM scm_long2num (long n);
 266 SCM_API SCM scm_ulong2num (unsigned long n);
 267 SCM_API SCM scm_size2num (size_t n);
 268 SCM_API SCM scm_ptrdiff2num (scm_t_ptrdiff n);
 269 SCM_API short scm_num2short (SCM num, unsigned long int pos,
 270                              const char *s_caller);
 271 SCM_API unsigned short scm_num2ushort (SCM num, unsigned long int pos,
 272                                        const char *s_caller);
 273 SCM_API int scm_num2int (SCM num, unsigned long int pos,
 274                          const char *s_caller);
 275 SCM_API unsigned int scm_num2uint (SCM num, unsigned long int pos,
 276                                    const char *s_caller);
 277 SCM_API long scm_num2long (SCM num, unsigned long int pos,
 278                            const char *s_caller);
 279 SCM_API unsigned long scm_num2ulong (SCM num, unsigned long int pos,
 280                                      const char *s_caller);
 281 SCM_API scm_t_ptrdiff scm_num2ptrdiff (SCM num, unsigned long int pos,
 282                                        const char *s_caller);
 283 SCM_API size_t scm_num2size (SCM num, unsigned long int pos,
 284                              const char *s_caller);
 285 #if SCM_SIZEOF_LONG_LONG != 0
 286 SCM_API SCM scm_long_long2num (long long sl);
 287 SCM_API SCM scm_ulong_long2num (unsigned long long sl);
 288 SCM_API long long scm_num2long_long (SCM num, unsigned long int pos,
 289                                      const char *s_caller);
 290 SCM_API unsigned long long scm_num2ulong_long (SCM num, unsigned long int pos,
 291                                                const char *s_caller);
 292 #endif
 293
 294 SCM_API SCM scm_float2num (float n);
 295 SCM_API SCM scm_double2num (double n);
 296 SCM_API float scm_num2float (SCM num, unsigned long int pos,
 297                              const char *s_caller);
 298 SCM_API double scm_num2double (SCM num, unsigned long int pos,
 299                                const char *s_caller);
 300
 301
 302 /* bignum internal functions */
 303 SCM_API SCM scm_i_mkbig (void);
 304 SCM_API SCM scm_i_normbig (SCM x);
 305 SCM_API int scm_i_bigcmp (SCM a, SCM b);
 306 SCM_API SCM scm_i_dbl2big (double d);
 307 SCM_API SCM scm_i_dbl2num (double d);
 308 SCM_API double scm_i_big2dbl (SCM b);
 309 SCM_API SCM scm_i_short2big (short n);
 310 SCM_API SCM scm_i_ushort2big (unsigned short n);
 311 SCM_API SCM scm_i_int2big (int n);
 312 SCM_API SCM scm_i_uint2big (unsigned int n);
 313 SCM_API SCM scm_i_long2big (long n);
 314 SCM_API SCM scm_i_ulong2big (unsigned long n);
 315 SCM_API SCM scm_i_size2big (size_t n);
 316 SCM_API SCM scm_i_ptrdiff2big (scm_t_ptrdiff n);
 317
 318 #if SCM_SIZEOF_LONG_LONG != 0
 319 SCM_API SCM scm_i_long_long2big (long long n);
 320 SCM_API SCM scm_i_ulong_long2big (unsigned long long n);
 321 #endif
 322
 323
 324 /* ratio functions */
 325 SCM_API SCM scm_make_ratio (SCM num, SCM den);
 326 SCM_API SCM scm_rationalize (SCM x, SCM err);
 327 SCM_API SCM scm_numerator (SCM z);
 328 SCM_API SCM scm_denominator (SCM z);
 329 SCM_API SCM scm_rational_p (SCM z);
 330
 331 /* fraction internal functions */
 332 SCM_API double scm_i_fraction2double (SCM z);
 333 SCM_API SCM scm_i_fraction_equalp (SCM x, SCM y);
 334 SCM_API int scm_i_print_fraction (SCM sexp, SCM port, scm_print_state *pstate);
 335
 336
 337 #ifdef GUILE_DEBUG
 338 SCM_API SCM scm_sys_check_number_conversions (void);
 339 #endif
 340
 341 /* conversion functions */
 342
 343 SCM_API int scm_is_integer (SCM val);
 344 SCM_API int scm_is_signed_integer (SCM val,
 345                                    scm_t_intmax min, scm_t_intmax max);
 346 SCM_API int scm_is_unsigned_integer (SCM val,
 347                                      scm_t_uintmax min, scm_t_uintmax max);
 348
 349 SCM_API SCM scm_from_signed_integer (scm_t_intmax val);
 350 SCM_API SCM scm_from_unsigned_integer (scm_t_uintmax val);
 351
 352 SCM_API scm_t_intmax scm_to_signed_integer (SCM val,
 353                                             scm_t_intmax min,
 354                                             scm_t_intmax max);
 355 SCM_API scm_t_uintmax scm_to_unsigned_integer (SCM val,
 356                                                scm_t_uintmax min,
 357                                                scm_t_uintmax max);
 358
 359 SCM_API scm_t_int8   scm_to_int8     (SCM x);
 360 SCM_API SCM          scm_from_int8   (scm_t_int8 x);
 361
 362 SCM_API scm_t_uint8  scm_to_uint8    (SCM x);
 363 SCM_API SCM          scm_from_uint8  (scm_t_uint8 x);
 364
 365 SCM_API scm_t_int16  scm_to_int16    (SCM x);
 366 SCM_API SCM          scm_from_int16  (scm_t_int16 x);
 367
 368 SCM_API scm_t_uint16 scm_to_uint16   (SCM x);
 369 SCM_API SCM          scm_from_uint16 (scm_t_uint16 x);
 370
 371 SCM_API scm_t_int32  scm_to_int32    (SCM x);
 372 SCM_API SCM          scm_from_int32  (scm_t_int32 x);
 373
 374 SCM_API scm_t_uint32 scm_to_uint32   (SCM x);
 375 SCM_API SCM          scm_from_uint32 (scm_t_uint32 x);
 376
 377 #if SCM_HAVE_T_INT64
 378
 379 SCM_API scm_t_int64  scm_to_int64    (SCM x);
 380 SCM_API SCM          scm_from_int64  (scm_t_int64 x);
 381
 382 SCM_API scm_t_uint64 scm_to_uint64   (SCM x);
 383 SCM_API SCM          scm_from_uint64 (scm_t_uint64 x);
 384
 385 #endif
 386
 387 #define scm_to_schar(x) \
 388   ((signed char)scm_to_signed_integer ((x), SCHAR_MIN, SCHAR_MAX))
 389 #define scm_to_uchar(x) \
 390   ((unsigned char)scm_to_unsigned_integer ((x), 0, UCHAR_MAX))
 391 #if CHAR_MIN == 0
 392 #define scm_to_char scm_to_uchar
 393 #else
 394 #define scm_to_char scm_to_schar
 395 #endif
 396
 397 #define scm_to_short(x) \
 398   ((short)scm_to_signed_integer ((x), SHRT_MIN, SHRT_MAX))
 399 #define scm_to_ushort(x) \
 400   ((unsigned short)scm_to_unsigned_integer ((x), 0, SHRT_MAX))
 401
 402 #define scm_to_int(x) \
 403   ((int)scm_to_signed_integer ((x), INT_MIN, INT_MAX))
 404 #define scm_to_uint(x) \
 405   ((unsigned int)scm_to_unsigned_integer ((x), 0, UINT_MAX))
 406
 407 #define scm_to_long(x) \
 408   ((long)scm_to_signed_integer ((x), LONG_MIN, LONG_MAX))
 409 #define scm_to_ulong(x) \
 410   ((unsigned long)scm_to_unsigned_integer ((x), 0, ULONG_MAX))
 411
 412 #define scm_to_ssize_t(x) \
 413   ((ssize_t)scm_to_signed_integer ((x), SCM_I_SSIZE_MIN, SCM_I_SSIZE_MAX))
 414 #define scm_to_size_t(x) \
 415   ((unsigned long)scm_to_unsigned_integer ((x), 0, SCM_I_SIZE_MAX))
 416
 417 #if SCM_SIZEOF_LONG_LONG != 0
 418 #define scm_to_long_long(x) \
 419   ((long long)scm_to_signed_integer ((x), SCM_I_LLONG_MIN, SCM_I_LLONG_MAX))
 420 #define scm_to_ulong_long(x) \
 421   ((unsigned long long)scm_to_unsigned_integer ((x), 0, SCM_I_ULLONG_MAX))
 422 #endif
 423
 424 #define scm_to_intmax(x) \
 425   ((scm_t_intmax)scm_to_signed_integer ((x),SCM_T_INTMAX_MIN,SCM_T_INTMAX_MAX))
 426 #define scm_to_uintmax(x) \
 427   ((scm_t_uintmax)scm_to_unsigned_integer ((x), 0, SCM_T_UINTMAX_MAX))
 428
 429 #define scm_from_schar(x) scm_from_signed_integer ((signed char)(x))
 430 #define scm_from_uchar(x) scm_from_unsigned_integer ((unsigned char)(x))
 431 #if CHAR_MIN == 0
 432 #define scm_from_char scm_from_uchar
 433 #else
 434 #define scm_from_char scm_from_schar
 435 #endif
 436
 437 #define scm_from_short(x)  scm_from_signed_integer ((short)(x))
 438 #define scm_from_ushort(x) scm_from_unsigned_integer ((unsigned short)(x))
 439
 440 #define scm_from_int(x)  scm_from_signed_integer ((int)(x))
 441 #define scm_from_uint(x) scm_from_unsigned_integer ((unsigned int)(x))
 442
 443 #define scm_from_long(x)  scm_from_signed_integer ((long)(x))
 444 #define scm_from_ulong(x) scm_from_unsigned_integer ((unsigned long)(x))
 445
 446 #define scm_from_ssize_t(x) scm_from_signed_integer ((ssize_t)(x))
 447 #define scm_from_size_t(x)  scm_from_unsigned_integer ((size_t)(x))
 448
 449 #if SCM_SIZEOF_LONG_LONG != 0
 450 #define scm_from_long_long(x)  scm_from_signed_integer ((long long)(x))
 451 #define scm_from_ulong_long(x) scm_from_unsigned_integer ((unsigned long long)(x))
 452 #endif
 453
 454 #define scm_from_intmax(x)  scm_from_signed_integer ((scm_t_intmax)(x))
 455 #define scm_from_uintmax(x) scm_from_unsigned_integer ((scm_t_uintmax)(x))
 456
 457 SCM_API int scm_is_real (SCM val);
 458 SCM_API double scm_to_double (SCM val);
 459 SCM_API SCM scm_from_double (double val);
 460
 461 SCM_API void scm_init_numbers (void);
 462
 463 #endif  /* SCM_NUMBERS_H */
 464
 465 /*
 466   Local Variables:
 467   c-file-style: "gnu"
 468   End:
 469 */