Ruby  3.4.0dev (2024-11-05 revision e440268d51fe02b303e3817a7a733a0dac1c5091)
rational.h
1 #ifndef INTERNAL_RATIONAL_H /*-*-C-*-vi:se ft=c:*/
2 #define INTERNAL_RATIONAL_H
11 #include "ruby/internal/config.h" /* for HAVE_LIBGMP */
12 #include "ruby/ruby.h" /* for struct RBasic */
13 #include "internal/numeric.h" /* for INT_POSITIVE_P */
14 #include "ruby_assert.h" /* for assert */
15 
16 struct RRational {
17  struct RBasic basic;
18  VALUE num;
19  VALUE den;
20 };
21 
22 #define RRATIONAL(obj) ((struct RRational *)(obj))
23 
24 /* rational.c */
25 VALUE rb_rational_canonicalize(VALUE x);
26 VALUE rb_rational_uminus(VALUE self);
27 VALUE rb_rational_plus(VALUE self, VALUE other);
28 VALUE rb_rational_minus(VALUE self, VALUE other);
29 VALUE rb_rational_mul(VALUE self, VALUE other);
30 VALUE rb_rational_div(VALUE self, VALUE other);
31 VALUE rb_lcm(VALUE x, VALUE y);
32 VALUE rb_rational_reciprocal(VALUE x);
33 VALUE rb_cstr_to_rat(const char *, int);
34 VALUE rb_rational_hash(VALUE self);
35 VALUE rb_rational_abs(VALUE self);
36 VALUE rb_rational_cmp(VALUE self, VALUE other);
37 VALUE rb_rational_pow(VALUE self, VALUE other);
38 VALUE rb_rational_floor(VALUE self, int ndigits);
39 VALUE rb_numeric_quo(VALUE x, VALUE y);
40 VALUE rb_flo_round_by_rational(int argc, VALUE *argv, VALUE num);
41 VALUE rb_float_numerator(VALUE x);
42 VALUE rb_float_denominator(VALUE x);
43 
44 static inline void RATIONAL_SET_NUM(VALUE r, VALUE n);
45 static inline void RATIONAL_SET_DEN(VALUE r, VALUE d);
46 
47 RUBY_SYMBOL_EXPORT_BEGIN
48 /* rational.c (export) */
49 VALUE rb_gcd(VALUE x, VALUE y);
50 VALUE rb_gcd_normal(VALUE self, VALUE other);
51 #if defined(HAVE_LIBGMP) && defined(HAVE_GMP_H)
52 VALUE rb_gcd_gmp(VALUE x, VALUE y);
53 #endif
54 RUBY_SYMBOL_EXPORT_END
55 
56 static inline void
57 RATIONAL_SET_NUM(VALUE r, VALUE n)
58 {
59  assert(RB_INTEGER_TYPE_P(n));
60  RB_OBJ_WRITE(r, &RRATIONAL(r)->num, n);
61 }
62 
63 static inline void
64 RATIONAL_SET_DEN(VALUE r, VALUE d)
65 {
66  assert(RB_INTEGER_TYPE_P(d));
67  assert(INT_POSITIVE_P(d));
68  RB_OBJ_WRITE(r, &RRATIONAL(r)->den, d);
69 }
70 
71 #endif /* INTERNAL_RATIONAL_H */
#define RB_INTEGER_TYPE_P
Old name of rb_integer_type_p.
Definition: value_type.h:87
#define RB_OBJ_WRITE(old, slot, young)
Declaration of a "back" pointer.
Definition: gc.h:603
Ruby object's base components.
Definition: rbasic.h:63
Internal header for Rational.
Definition: rational.h:16
uintptr_t VALUE
Type that represents a Ruby object.
Definition: value.h:40