[DAFFODIL-2807] Add left over data check to generated C parsers

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.5.0
• Component/s: Back End C-Generator
• Assignee: John Interrante
• Reporter: John Interrante
• Created: 01/Apr/23 18:37
• Updated: 10/Apr/23 17:12
• Resolved: 07/Apr/23 23:17

Description

Fix generated C parsers not checking for left over data after parse calls and not clearing infoset between parse calls.  Rename some infoset C functions more consistently (C snake style).

Also enhance C code generator to support DFDL schemas containing simple type root elements, allowing generated C parsers to parse data and infosets containing only a single element.  Add examples and new tests for simple root elements as well.

Also replace any non-alphabetical / non-numerical characters with underscores when converting XML identifiers to C identifiers, allowing XML element names like "simple-boolean" to become "simple_boolean" in generated C code.