added support for xml schemas

xml_loader.py

@@ -0,0 +1,65 @@
+from __future__ import annotations
+from bs4 import BeautifulSoup
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from io import TextIOWrapper
+
+class XMLLoader:
+    def load(file_: TextIOWrapper) -> dict:
+        schema = {}
+        bs = BeautifulSoup(file_.read(), "xml")
+        structElmts = bs.findAll("structure")
+        structures = {}
+        
+        for structElmt in structElmts:
+            structures[structElmt.get("id")] = XMLLoader.parseStructure(structElmt)
+        
+        schema["structures"] = structures
+        return schema
+    
+    def parseStructure(structElmt: any) -> dict:
+        struct = {}
+        struct["bits"] = structElmt.get("bits")
+        ranges = {}
+        rangeElmts = structElmt.findAll("range")
+        for rangeElmt in rangeElmts:
+            span = rangeElmt.get("end") + "-" + rangeElmt.get("start")
+            ranges[span] = XMLLoader.parseRange(rangeElmt)
+        
+        struct["ranges"] = ranges
+        return struct
+
+    def parseRange(rangeElmt: any) -> dict:
+        range_ = {}
+        range_["name"] = rangeElmt.get("name")
+        desc = rangeElmt.find("description")
+        if desc is not None: range_["description"] = desc.getText()
+        
+        valuesElmt = rangeElmt.find("values")
+        if valuesElmt is not None:
+            range_["values"] = XMLLoader.parseValues(valuesElmt)
+        
+        if rangeElmt.get("depends-on"):
+            range_["depends-on"] = rangeElmt.get("depends-on")
+        
+        return range_
+
+    def parseValues(valuesElmt: any) -> dict:
+        values = {}
+        caseElmts = valuesElmt.findAll("case")
+        
+        for caseElmt in caseElmts:
+            val = caseElmt.get("value")
+            desc = caseElmt.getText()
+            struct = caseElmt.get("structure")
+            
+            if struct:
+                values[val] = {
+                    "description": desc,
+                    "structure": struct
+                }
+            else:
+                values[val] = desc
+
+        return values