diff options
Diffstat (limited to 'enum.c')
-rw-r--r-- | enum.c | 16 |
1 files changed, 15 insertions, 1 deletions
@@ -1849,6 +1849,20 @@ each_cons_i(VALUE i, VALUE args, int argc, VALUE *argv) return v; } +static VALUE +enum_each_cons_size(VALUE obj, VALUE args) +{ + VALUE n, size; + long cons_size = NUM2LONG(RARRAY_PTR(args)[0]); + if (cons_size <= 0) rb_raise(rb_eArgError, "invalid size"); + + size = enum_size(obj, 0); + if (size == Qnil) return Qnil; + + n = rb_funcall(size, '+', 1, LONG2NUM(1 - cons_size)); + return (rb_cmpint(rb_funcall(n, id_cmp, 1, LONG2FIX(0)), n, LONG2FIX(0)) == -1) ? LONG2FIX(0) : n; +} + /* * call-seq: * enum.each_cons(n) { ... } -> nil @@ -1877,7 +1891,7 @@ enum_each_cons(VALUE obj, VALUE n) NODE *memo; if (size <= 0) rb_raise(rb_eArgError, "invalid size"); - RETURN_ENUMERATOR(obj, 1, &n); + RETURN_SIZED_ENUMERATOR(obj, 1, &n, enum_each_cons_size); memo = NEW_MEMO(rb_ary_new2(size), 0, size); rb_block_call(obj, id_each, 0, 0, each_cons_i, (VALUE)memo); |