* rational.c: Include gmp.h if GMP is used.

(GMP_GCD_DIGITS): New macro.
  (rb_gcd_gmp): New function.
  (f_gcd_normal): Renamed from f_gcd.
  (rb_gcd_normal): New function.
  (f_gcd): Invoke rb_gcd_gmp or f_gcd_normal.

* internal.h (rb_gcd_normal): Declared.
  (rb_gcd_gmp): Ditto.

* ext/-test-/rational: New directory.




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42858 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/-test-/rational/depend

@@ -0,0 +1,3 @@
+$(OBJS): $(HDRS) $(ruby_headers)
+
+rat.o: rat.c $(top_srcdir)/internal.h

ext/-test-/rational/extconf.rb

@@ -0,0 +1,7 @@
+$INCFLAGS << " -I$(topdir) -I$(top_srcdir)"
+$srcs = Dir[File.join($srcdir, "*.{#{SRC_EXT.join(%q{,})}}")]
+inits = $srcs.map {|s| File.basename(s, ".*")}
+inits.delete("init")
+inits.map! {|s|"X(#{s})"}
+$defs << "-DTEST_INIT_FUNCS(X)=\"#{inits.join(' ')}\""
+create_makefile("-test-/rational")

ext/-test-/rational/rat.c

@@ -0,0 +1,36 @@
+#include "ruby.h"
+#include "internal.h"
+
+static VALUE
+big(VALUE x)
+{
+    if (FIXNUM_P(x))
+        return rb_int2big(FIX2LONG(x));
+    if (RB_TYPE_P(x, T_BIGNUM))
+        return x;
+    rb_raise(rb_eTypeError, "can't convert %s to Bignum",
+            rb_obj_classname(x));
+}
+
+static VALUE
+gcd_normal(VALUE x, VALUE y)
+{
+    return rb_big_norm(rb_gcd_normal(rb_to_int(x), rb_to_int(y)));
+}
+
+#if defined(HAVE_LIBGMP) && defined(HAVE_GMP_H)
+static VALUE
+gcd_gmp(VALUE x, VALUE y)
+{
+    return rb_big_norm(rb_gcd_gmp(big(x), big(y)));
+}
+#else
+#define gcd_gmp rb_f_notimplement
+#endif
+
+void
+Init_rational(VALUE klass)
+{
+    rb_define_method(rb_cInteger, "gcd_normal", gcd_normal, 1);
+    rb_define_method(rb_cInteger, "gcd_gmp", gcd_gmp, 1);
+}