1 files changed, 18 insertions, 0 deletions
diff --git a/sax/inc/sax_processor.hh b/sax/inc/sax_processor.hh
index 7ca32f7..cf53807 100644
--- a/sax/inc/sax_processor.hh
+++ b/sax/inc/sax_processor.hh
@@ -2,6 +2,7 @@
 #define MODXML_SAX_PROCESSOR_HH
 
 #include <memory>
+#include <span>
 
 namespace modxml {
 namespace sax {
@@ -23,6 +24,23 @@ class Processor {
    */
   static std::unique_ptr<Processor> create(std::shared_ptr<Delegate> delegate);
 
+  /**
+   * Process (consume) input data.
+   * Returns bytes consumed, can be zero.
+   */
+  virtual std::size_t process(std::span<uint8_t const> data,
+                              std::size_t offset = 0) = 0;
+
+  /**
+   * When called from delegate, points to the start of the element that
+   * triggered the callback.
+   * When called otherwise, points to the last element that was processed.
+   * Lines start at 1.
+   * Columns start at 0.
+   */
+  virtual uint64_t line() const = 0;
+  virtual uint64_t column() const = 0;
+
  protected:
   Processor() = default;