fix zsv_cum_scanned_length bug if called during final() when input ha…

…s no trailing line end (#184)

add zsv_row_length_raw_bytes()

include/zsv/api.h

@@ -258,6 +258,11 @@ ZSV_EXPORT size_t zsv_scanned_length(zsv_parser);
  */
 ZSV_EXPORT size_t zsv_cum_scanned_length(zsv_parser parser);
 
+/**
+ * @return number of raw bytes scanned from the beginning to the end of this row
+ */
+ZSV_EXPORT size_t zsv_row_length_raw_bytes(zsv_parser parser);
+
 /**
  * Check the quoted status of the last cell that was read. This function is only
  * applicable when called from within a cell_handler() callback. Furthermore, this

src/zsv.c

@@ -446,7 +446,14 @@ size_t zsv_scanned_length(zsv_parser parser) {
 
 ZSV_EXPORT
 size_t zsv_cum_scanned_length(zsv_parser parser) {
-  return parser->cum_scanned_length + parser->scanned_length + (parser->had_bom ? strlen(ZSV_BOM) : 0);
+  return parser->cum_scanned_length +
+    (parser->finished ? 0 : parser->scanned_length) +
+    (parser->had_bom ? strlen(ZSV_BOM) : 0);
+}
+
+ZSV_EXPORT
+size_t zsv_row_length_raw_bytes(zsv_parser parser) {
+  return parser->scanned_length - parser->row_start;
 }
 
 /**