split internal.h into files

One day, I could not resist the way it was written.  I finally started
to make the code clean.  This changeset is the beginning of a series of
housekeeping commits.  It is a simple refactoring; split internal.h into
files, so that we can divide and concur in the upcoming commits.  No
lines of codes are either added or removed, except the obvious file
headers/footers.  The generated binary is identical to the one before.

1 files changed, 47 insertions, 0 deletions

diff --git a/internal/rational.h b/internal/rational.h
new file mode 100644
index 0000000000..993d056927
--- /dev/null
+++ b/internal/rational.h
@@ -0,0 +1,47 @@
+#ifndef INTERNAL_RATIONAL_H /* -*- C -*- */
+#define INTERNAL_RATIONAL_H
+/**
+ * @file
+ * @brief      Internal header for Rational.
+ * @author     \@shyouhei
+ * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
+ *             Permission  is hereby  granted,  to  either redistribute  and/or
+ *             modify this file, provided that  the conditions mentioned in the
+ *             file COPYING are met.  Consult the file for details.
+ */
+
+struct RRational {
+    struct RBasic basic;
+    VALUE num;
+    VALUE den;
+};
+
+#define RRATIONAL(obj) (R_CAST(RRational)(obj))
+#define RRATIONAL_SET_NUM(rat, n) RB_OBJ_WRITE((rat), &((struct RRational *)(rat))->num,(n))
+#define RRATIONAL_SET_DEN(rat, d) RB_OBJ_WRITE((rat), &((struct RRational *)(rat))->den,(d))
+
+/* rational.c */
+VALUE rb_rational_canonicalize(VALUE x);
+VALUE rb_rational_uminus(VALUE self);
+VALUE rb_rational_plus(VALUE self, VALUE other);
+VALUE rb_rational_mul(VALUE self, VALUE other);
+VALUE rb_lcm(VALUE x, VALUE y);
+VALUE rb_rational_reciprocal(VALUE x);
+VALUE rb_cstr_to_rat(const char *, int);
+VALUE rb_rational_abs(VALUE self);
+VALUE rb_rational_cmp(VALUE self, VALUE other);
+VALUE rb_rational_pow(VALUE self, VALUE other);
+VALUE rb_numeric_quo(VALUE x, VALUE y);
+VALUE rb_float_numerator(VALUE x);
+VALUE rb_float_denominator(VALUE x);
+
+RUBY_SYMBOL_EXPORT_BEGIN
+/* rational.c (export) */
+VALUE rb_gcd(VALUE x, VALUE y);
+VALUE rb_gcd_normal(VALUE self, VALUE other);
+#if defined(HAVE_LIBGMP) && defined(HAVE_GMP_H)
+VALUE rb_gcd_gmp(VALUE x, VALUE y);
+#endif
+RUBY_SYMBOL_EXPORT_END
+
+#endif /* INTERNAL_RATIONAL_H */