1 files changed, 59 insertions, 0 deletions
diff --git a/tensorflow/core/lib/strings/scanner.cc b/tensorflow/core/lib/strings/scanner.cc
new file mode 100644
index 0000000000..b05400c97d
--- /dev/null
+++ b/tensorflow/core/lib/strings/scanner.cc
@@ -0,0 +1,59 @@
+/* Copyright 2016 Google Inc. All Rights Reserved.
+
+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 "tensorflow/core/lib/strings/scanner.h"
+
+namespace tensorflow {
+namespace strings {
+
+void Scanner::ScanEscapedUntilImpl(char end_ch) {
+  for (;;) {
+    if (cur_.empty()) {
+      Error();
+      return;
+    }
+    const char ch = cur_[0];
+    if (ch == end_ch) {
+      return;
+    }
+
+    cur_.remove_prefix(1);
+    if (ch == '\\') {
+      // Escape character, skip next character.
+      if (cur_.empty()) {
+        Error();
+        return;
+      }
+      cur_.remove_prefix(1);
+    }
+  }
+}
+
+bool Scanner::GetResult(StringPiece* remaining, StringPiece* capture) {
+  if (error_) {
+    return false;
+  }
+  if (remaining != nullptr) {
+    *remaining = cur_;
+  }
+  if (capture != nullptr) {
+    const char* end = capture_end_ == nullptr ? cur_.data() : capture_end_;
+    *capture = StringPiece(capture_start_, end - capture_start_);
+  }
+  return true;
+}
+
+}  // namespace strings
+}  // namespace tensorflow