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| author | Yukihiro Matsumoto <[email protected]> | 2012-05-15 16:40:57 +0900 |
|---|---|---|
| committer | Yukihiro Matsumoto <[email protected]> | 2012-05-15 16:40:57 +0900 |
| commit | 3b53b3be68139da1ae63c1eddcb3878d524d1510 (patch) | |
| tree | c5932be3eb168d3a9c1a907bbbe3ad8702beb250 /src/numeric.c | |
| parent | 1bc0c12096ed667cd4bb9e5b9301f52c8b61cc02 (diff) | |
| download | mruby-3b53b3be68139da1ae63c1eddcb3878d524d1510.tar.gz mruby-3b53b3be68139da1ae63c1eddcb3878d524d1510.zip | |
add Numeric#**
Diffstat (limited to 'src/numeric.c')
| -rw-r--r-- | src/numeric.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/numeric.c b/src/numeric.c index 132da1553..81f2d90fb 100644 --- a/src/numeric.c +++ b/src/numeric.c @@ -92,6 +92,30 @@ fix_uminus(mrb_state *mrb, mrb_value num) } /* + * call-seq: + * + * num ** other -> num + * + * Raises <code>num</code> the <code>other</code> power. + * + * 2.0**3 #=> 8.0 + */ +static mrb_value +num_pow(mrb_state *mrb, mrb_value x) +{ + mrb_value y; + int both_int = FALSE; + mrb_float d; + + mrb_get_args(mrb, "o", &y); + if (FIXNUM_P(x) && FIXNUM_P(y)) both_int = TRUE; + d = pow(mrb_to_flo(mrb, x), mrb_to_flo(mrb, y)); + if (both_int && isfinite(d) && FIXABLE(d)) + return mrb_fixnum_value((mrb_int)d); + return mrb_float_value(d); +} + +/* * call-seq: * num.quo(numeric) -> real * @@ -1294,6 +1318,7 @@ mrb_init_numeric(mrb_state *mrb) mrb_define_method(mrb, numeric, "+@", num_uplus, ARGS_REQ(1)); /* 15.2.7.4.1 */ mrb_define_method(mrb, numeric, "-@", num_uminus, ARGS_REQ(1)); /* 15.2.7.4.2 */ + mrb_define_method(mrb, numeric, "**", num_pow, ARGS_REQ(1)); mrb_define_method(mrb, numeric, "abs", num_abs, ARGS_NONE()); /* 15.2.7.4.3 */ mrb_define_method(mrb, numeric, "quo", num_quo, ARGS_REQ(1)); /* 15.2.7.4.5 (x) */ mrb_define_method(mrb, numeric, "<=>", num_cmp, ARGS_REQ(1)); /* 15.2.9.3.6 */ |