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* enum.c (enum_minmax): reduce comparison.

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(enum_minmax_by): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25059 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2009-09-23 15:19:13 +00:00
parent 7728a17a27
commit fc58a6c5bd
2 changed files with 148 additions and 44 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Thu Sep 24 00:17:06 2009 Tanaka Akira <akr@fsij.org>
* enum.c (enum_minmax): reduce comparison.
(enum_minmax_by): ditto.
Wed Sep 23 22:58:57 2009 Tanaka Akira <akr@fsij.org>
* lib/thread.rb (ConditionVariable#wait): add timeout argument.

187
enum.c
View file

@ -1134,57 +1134,114 @@ enum_max(VALUE obj)
return result[0];
}
static VALUE
minmax_i(VALUE i, VALUE *memo, int argc, VALUE *argv)
static void
minmax_i_update(VALUE i, VALUE j, VALUE *memo)
{
int n;
ENUM_WANT_SVALUE();
if (memo[0] == Qundef) {
memo[0] = i;
memo[1] = i;
memo[1] = j;
}
else {
n = rb_cmpint(rb_funcall(i, id_cmp, 1, memo[0]), i, memo[0]);
if (n < 0) {
memo[0] = i;
}
n = rb_cmpint(rb_funcall(i, id_cmp, 1, memo[1]), i, memo[1]);
n = rb_cmpint(rb_funcall(j, id_cmp, 1, memo[1]), j, memo[1]);
if (n > 0) {
memo[1] = i;
memo[1] = j;
}
}
}
static VALUE
minmax_i(VALUE i, VALUE *memo, int argc, VALUE *argv)
{
int n;
VALUE j;
ENUM_WANT_SVALUE();
if (memo[3] == Qundef) {
memo[3] = i;
return Qnil;
}
j = memo[3];
memo[3] = Qundef;
n = rb_cmpint(rb_funcall(j, id_cmp, 1, i), j, i);
if (n == 0)
i = j;
else if (n < 0) {
VALUE tmp;
tmp = i;
i = j;
j = tmp;
}
minmax_i_update(i, j, memo);
return Qnil;
}
static void
minmax_ii_update(VALUE i, VALUE j, VALUE *memo)
{
int n;
if (memo[0] == Qundef) {
memo[0] = i;
memo[1] = j;
}
else {
VALUE ary = memo[2];
rb_ary_store(ary, 0, i);
rb_ary_store(ary, 1, memo[0]);
n = rb_cmpint(rb_yield(ary), i, memo[0]);
if (n < 0) {
memo[0] = i;
}
rb_ary_store(ary, 0, j);
rb_ary_store(ary, 1, memo[1]);
n = rb_cmpint(rb_yield(ary), j, memo[1]);
if (n > 0) {
memo[1] = j;
}
}
}
static VALUE
minmax_ii(VALUE i, VALUE *memo, int argc, VALUE *argv)
{
int n;
VALUE ary, j;
ENUM_WANT_SVALUE();
if (memo[0] == Qundef) {
memo[0] = i;
memo[1] = i;
if (memo[3] == Qundef) {
memo[3] = i;
return Qnil;
}
else {
VALUE ary = memo[2];
j = memo[3];
memo[3] = Qundef;
RARRAY_PTR(ary)[0] = i;
RARRAY_PTR(ary)[1] = memo[0];
n = rb_cmpint(rb_yield(ary), i, memo[0]);
if (n < 0) {
memo[0] = i;
}
RARRAY_PTR(ary)[0] = i;
RARRAY_PTR(ary)[1] = memo[1];
n = rb_cmpint(rb_yield(ary), i, memo[1]);
if (n > 0) {
memo[1] = i;
}
ary = memo[2];
rb_ary_store(ary, 0, j);
rb_ary_store(ary, 1, i);
n = rb_cmpint(rb_yield(ary), j, i);
if (n == 0)
i = j;
else if (n < 0) {
VALUE tmp;
tmp = i;
i = j;
j = tmp;
}
minmax_ii_update(i, j, memo);
return Qnil;
}
@ -1206,20 +1263,25 @@ minmax_ii(VALUE i, VALUE *memo, int argc, VALUE *argv)
static VALUE
enum_minmax(VALUE obj)
{
VALUE result[3];
VALUE result[4];
VALUE ary = rb_ary_new3(2, Qnil, Qnil);
result[0] = Qundef;
result[3] = Qundef;
if (rb_block_given_p()) {
result[2] = ary;
rb_block_call(obj, id_each, 0, 0, minmax_ii, (VALUE)result);
if (result[3] != Qundef)
minmax_ii_update(result[3], result[3], result);
}
else {
rb_block_call(obj, id_each, 0, 0, minmax_i, (VALUE)result);
if (result[3] != Qundef)
minmax_i_update(result[3], result[3], result);
}
if (result[0] != Qundef) {
RARRAY_PTR(ary)[0] = result[0];
RARRAY_PTR(ary)[1] = result[1];
rb_ary_store(ary, 0, result[0]);
rb_ary_store(ary, 1, result[1]);
}
return ary;
}
@ -1310,30 +1372,63 @@ enum_max_by(VALUE obj)
return memo[1];
}
static void
minmax_by_i_update(VALUE v1, VALUE v2, VALUE i1, VALUE i2, VALUE *memo)
{
if (memo[0] == Qundef) {
memo[0] = v1;
memo[1] = v2;
memo[2] = i1;
memo[3] = i2;
}
else {
if (rb_cmpint(rb_funcall(v1, id_cmp, 1, memo[0]), v1, memo[0]) < 0) {
memo[0] = v1;
memo[2] = i1;
}
if (rb_cmpint(rb_funcall(v2, id_cmp, 1, memo[1]), v2, memo[1]) > 0) {
memo[1] = v2;
memo[3] = i2;
}
}
}
static VALUE
minmax_by_i(VALUE i, VALUE *memo, int argc, VALUE *argv)
{
VALUE v;
VALUE vi, vj, j;
int n;
ENUM_WANT_SVALUE();
v = rb_yield(i);
if (memo[0] == Qundef) {
memo[0] = v;
memo[1] = v;
memo[2] = i;
memo[3] = i;
vi = rb_yield(i);
if (memo[4] == Qundef) {
memo[4] = vi;
memo[5] = i;
return Qnil;
}
else {
if (rb_cmpint(rb_funcall(v, id_cmp, 1, memo[0]), v, memo[0]) < 0) {
memo[0] = v;
memo[2] = i;
}
if (rb_cmpint(rb_funcall(v, id_cmp, 1, memo[1]), v, memo[1]) > 0) {
memo[1] = v;
memo[3] = i;
}
vj = memo[4];
j = memo[5];
memo[4] = Qundef;
n = rb_cmpint(rb_funcall(vj, id_cmp, 1, vi), vj, vi);
if (n == 0) {
i = j;
vi = vj;
}
else if (n < 0) {
VALUE tmp;
tmp = i;
i = j;
j = tmp;
tmp = vi;
vi = vj;
vj = tmp;
}
minmax_by_i_update(vi, vj, i, j, memo);
return Qnil;
}
@ -1352,7 +1447,7 @@ minmax_by_i(VALUE i, VALUE *memo, int argc, VALUE *argv)
static VALUE
enum_minmax_by(VALUE obj)
{
VALUE memo[4];
VALUE memo[6];
RETURN_ENUMERATOR(obj, 0, 0);
@ -1360,7 +1455,11 @@ enum_minmax_by(VALUE obj)
memo[1] = Qundef;
memo[2] = Qnil;
memo[3] = Qnil;
memo[4] = Qundef;
memo[5] = Qundef;
rb_block_call(obj, id_each, 0, 0, minmax_by_i, (VALUE)memo);
if (memo[4] != Qundef)
minmax_by_i_update(memo[4], memo[4], memo[5], memo[5], memo);
return rb_assoc_new(memo[2], memo[3]);
}