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author | Manjunath Kudlur <keveman@gmail.com> | 2015-11-06 16:27:58 -0800 |
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committer | Manjunath Kudlur <keveman@gmail.com> | 2015-11-06 16:27:58 -0800 |
commit | f41959ccb2d9d4c722fe8fc3351401d53bcf4900 (patch) | |
tree | ef0ca22cb2a5ac4bdec9d080d8e0788a53ed496d /tensorflow/core/util/sparse/group_iterator.cc |
TensorFlow: Initial commit of TensorFlow library.
TensorFlow is an open source software library for numerical computation
using data flow graphs.
Base CL: 107276108
Diffstat (limited to 'tensorflow/core/util/sparse/group_iterator.cc')
-rw-r--r-- | tensorflow/core/util/sparse/group_iterator.cc | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/tensorflow/core/util/sparse/group_iterator.cc b/tensorflow/core/util/sparse/group_iterator.cc new file mode 100644 index 0000000000..e153bcdbb4 --- /dev/null +++ b/tensorflow/core/util/sparse/group_iterator.cc @@ -0,0 +1,49 @@ +#include "tensorflow/core/util/sparse/group_iterator.h" + +namespace tensorflow { +namespace sparse { + +void GroupIterable::IteratorStep::UpdateEndOfGroup() { + ++next_loc_; + int64 N = iter_->ix_.dim_size(0); + auto ix_t = iter_->ix_.template matrix<int64>(); + while (next_loc_ < N && iter_->GroupMatches(ix_t, loc_, next_loc_)) { + ++next_loc_; + } +} + +bool GroupIterable::IteratorStep::operator!=(const IteratorStep& rhs) const { + CHECK_EQ(rhs.iter_, iter_) << "Can't compare steps from different iterators"; + return (rhs.loc_ != loc_); +} + +GroupIterable::IteratorStep& GroupIterable::IteratorStep:: +operator++() { // prefix ++ + loc_ = next_loc_; + UpdateEndOfGroup(); + return *this; +} + +GroupIterable::IteratorStep GroupIterable::IteratorStep::operator++( + int) { // postfix ++ + IteratorStep lhs(*this); + ++(*this); + return lhs; +} + +std::vector<int64> Group::group() const { + std::vector<int64> g; + auto ix_t = iter_->ix_.template matrix<int64>(); + for (const int d : iter_->group_dims_) { + g.push_back(ix_t(loc_, d)); + } + return g; +} + +TTypes<int64>::UnalignedConstMatrix Group::indices() const { + return TTypes<int64>::UnalignedConstMatrix( + &(iter_->ix_.matrix<int64>()(loc_, 0)), next_loc_ - loc_, iter_->dims_); +} + +} // namespace sparse +} // namespace tensorflow |