Port over Icing c++ code from upstream

Change-Id: Ia3981fed7e0e70589efc027d4123f306cdfbe990

1 files changed, 44 insertions, 0 deletions

diff --git a/icing/index/iterator/doc-hit-info-iterator-all-document-id.cc b/icing/index/iterator/doc-hit-info-iterator-all-document-id.cc
new file mode 100644
index 0000000..0d5bfea
--- /dev/null
+++ b/icing/index/iterator/doc-hit-info-iterator-all-document-id.cc
@@ -0,0 +1,44 @@
+// Copyright (C) 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "icing/index/iterator/doc-hit-info-iterator-all-document-id.h"
+
+#include "utils/base/status.h"
+#include "icing/absl_ports/canonical_errors.h"
+#include "icing/index/hit/doc-hit-info.h"
+#include "icing/index/iterator/doc-hit-info-iterator.h"
+#include "icing/store/document-id.h"
+
+namespace icing {
+namespace lib {
+
+DocHitInfoIteratorAllDocumentId::DocHitInfoIteratorAllDocumentId(
+    const DocumentId document_id_limit)
+    : document_id_limit_(document_id_limit),
+      current_document_id_(document_id_limit) {}
+
+libtextclassifier3::Status DocHitInfoIteratorAllDocumentId::Advance() {
+  if (!IsDocumentIdValid(current_document_id_)) {
+    // Reached the end, set these to invalid values and return
+    doc_hit_info_ = DocHitInfo(kInvalidDocumentId);
+    hit_intersect_section_ids_mask_ = kSectionIdMaskNone;
+    return absl_ports::ResourceExhaustedError(
+        "No more DocHitInfos in iterator");
+  }
+  doc_hit_info_.set_document_id(current_document_id_--);
+  return libtextclassifier3::Status::OK;
+}
+
+}  // namespace lib
+}  // namespace icing