1 files changed, 33 insertions, 0 deletions
diff --git a/includes/image_io/extras/string_view_data_source.h b/includes/image_io/extras/string_view_data_source.h
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+++ b/includes/image_io/extras/string_view_data_source.h
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+#ifndef IMAGE_IO_EXTRAS_STRING_VIEW_DATA_SOURCE_H_  // NOLINT
+#define IMAGE_IO_EXTRAS_STRING_VIEW_DATA_SOURCE_H_  // NOLINT
+
+#include "image_io/base/data_destination.h"
+#include "image_io/base/data_range.h"
+#include "image_io/base/data_segment_data_source.h"
+
+#include "third_party/absl/strings/string_view.h"
+
+namespace photos_editing_formats {
+namespace image_io {
+
+/// A DataSource that reads bytes from a string_view. The underlying string data
+/// must have a lifetime that exceeds the lifetime of this data source, and the
+/// string contents must not change while the data source is referencing it.
+class StringViewDataSource : public DataSegmentDataSource {
+ public:
+  /// Constructs a StringViewDataSource using the given string_view.
+  /// @param str The string_view to read from.
+  explicit StringViewDataSource(absl::string_view string_src);
+
+  /// Returns the string view being used as the data source.
+  absl::string_view GetStringView() const { return string_src_; }
+
+ private:
+  /// The string_view to read from.
+  absl::string_view string_src_;
+};
+
+}  // namespace image_io
+}  // namespace photos_editing_formats
+
+#endif // IMAGE_IO_EXTRAS_STRING_VIEW_DATA_SOURCE_H_  // NOLINT