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author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2007-10-09 12:35:31 +0000 |
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committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2007-10-09 12:35:31 +0000 |
commit | 7550659a330c099b31c047293a8ab486b8638c8a (patch) | |
tree | 1f63c5c9f2360ed75810ec7f52c158176c985e97 /array.c | |
parent | f6a26d06a26cdc094b2d675f29c096110fa14275 (diff) | |
download | ruby-7550659a330c099b31c047293a8ab486b8638c8a.tar.gz |
* array.c (rb_ary_permutation): use frozen shared hidden array.
[ruby-dev:31985]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13668 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'array.c')
-rw-r--r-- | array.c | 7 |
1 files changed, 3 insertions, 4 deletions
@@ -2988,7 +2988,7 @@ permute0(long n, long r, long *p, long index, int *used, VALUE values) /* And yield it to the associated block */ VALUE result = rb_ary_new2(r); VALUE *result_array = RARRAY_PTR(result); - VALUE *values_array = RARRAY_PTR(values); + const VALUE *values_array = RARRAY_PTR(values); for (j = 0; j < r; j++) result_array[j] = values_array[p[j]]; RARRAY(result)->len = r; @@ -3044,12 +3044,11 @@ rb_ary_permutation(VALUE ary, VALUE num) long *p = (long*)RSTRING_PTR(t0); volatile VALUE t1 = tmpbuf(n,sizeof(int)); int *used = (int*)RSTRING_PTR(t1); - - ary = rb_ary_dup(ary); /* private defensive copy of ary */ + VALUE ary0 = ary_make_shared(ary); /* private defensive copy of ary */ for (i = 0; i < n; i++) used[i] = 0; /* initialize array */ - permute0(n,r,p,0,used,ary); /* compute and yield permutations */ + permute0(n, r, p, 0, used, ary0); /* compute and yield permutations */ } return ary; } |