diff options
author | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2007-06-01 16:27:05 +0000 |
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committer | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2007-06-01 16:27:05 +0000 |
commit | 2c4aff3fe045ea63f2dfafe69f61e221acc04ac4 (patch) | |
tree | 18c1a2673e7507a440a516fdd8887939a22774b0 /numeric.c | |
parent | 62872956b6fc70d43c39b0476962b509dbb96de8 (diff) | |
download | ruby-2c4aff3fe045ea63f2dfafe69f61e221acc04ac4.tar.gz |
* numeric.c (int_round): small optimization to handle bignums.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12423 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'numeric.c')
-rw-r--r-- | numeric.c | 18 |
1 files changed, 17 insertions, 1 deletions
@@ -2308,6 +2308,22 @@ int_pow(long x, unsigned long y) return LONG2NUM(z); } +static VALUE +int_round(int argc, VALUE* argv, VALUE num) +{ + VALUE nd; + int ndigits; + + if (argc == 0) return num; + rb_scan_args(argc, argv, "1", &nd); + ndigits = NUM2INT(nd); + if (ndigits > 0) { + return rb_Float(num); + } + ndigits = -ndigits; + return rb_funcall(num, '-', 1, rb_funcall(num, '%', 1, int_pow(10, ndigits))); +} + /* * call-seq: * fix ** other => Numeric @@ -3013,8 +3029,8 @@ Init_Numeric(void) rb_define_method(rb_cInteger, "to_int", int_to_i, 0); rb_define_method(rb_cInteger, "floor", int_to_i, 0); rb_define_method(rb_cInteger, "ceil", int_to_i, 0); - rb_define_method(rb_cInteger, "round", int_to_i, 0); rb_define_method(rb_cInteger, "truncate", int_to_i, 0); + rb_define_method(rb_cInteger, "round", int_round, -1); rb_cFixnum = rb_define_class("Fixnum", rb_cInteger); rb_include_module(rb_cFixnum, rb_mPrecision); |