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Fix FIXABLE_FLOAT() on MRB_INT64; ref #4566

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Normal `TYPED_FIXABLE(f,mrb_float)` does not work on 64bit int from
casting problems. The new approach works well, but assumes two's
complement and IEEE-754 floating point numbers.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2019-07-20 02:56:17 +09:00
parent cf4cddf7a1
commit 6f67fddb87
1 changed files with 4 additions and 0 deletions
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include/mruby/numeric.h
+4
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@@ -23,8 +23,12 @@ MRB_BEGIN_DECL
#define NEGFIXABLE(f) TYPED_NEGFIXABLE(f,mrb_int)
#define FIXABLE(f) TYPED_FIXABLE(f,mrb_int)
#ifndef MRB_WITHOUT_FLOAT
#ifdef MRB_INT64
#define FIXABLE_FLOAT(f) ((f)>=-9223372036854775808.0 && (f)<9223372036854775808.0)
#else
#define FIXABLE_FLOAT(f) TYPED_FIXABLE(f,mrb_float)
#endif
#endif
#ifndef MRB_WITHOUT_FLOAT
MRB_API mrb_value mrb_flo_to_fixnum(mrb_state *mrb, mrb_value val);