[libxml2]Add libxml2 library

libxml2/python/tests/xpathleak.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+import setup_test
+import libxml2
+import sys
+
+libxml2.debugMemory(True)
+
+expect="""--> Invalid expression
+--> Invalid expression
+--> Invalid expression
+--> Invalid expression
+--> Invalid expression
+--> Invalid expression
+--> Invalid expression
+--> Invalid expression
+--> Invalid expression
+--> Invalid expression
+"""
+err=""
+def callback(ctx, str):
+     global err
+
+     err = err + "%s %s" % (ctx, str)
+
+libxml2.registerErrorHandler(callback, "-->")
+
+doc = libxml2.parseDoc("<fish/>")
+ctxt = doc.xpathNewContext()
+ctxt.setContextNode(doc)
+badexprs = (
+	":false()", "bad:()", "bad(:)", ":bad(:)", "bad:(:)", "bad:bad(:)",
+	"a:/b", "/c:/d", "//e:/f", "g://h"
+	)
+for expr in badexprs:
+	try:
+		ctxt.xpathEval(expr)
+	except libxml2.xpathError:
+	        pass
+	else:
+		print("Unexpectedly legal expression:", expr)
+ctxt.xpathFreeContext()
+doc.freeDoc()
+
+if err != expect:
+    print("error")
+    print("received %s" %(err))
+    print("expected %s" %(expect))
+    sys.exit(1)
+
+libxml2.cleanupParser()
+leakedbytes = libxml2.debugMemory(True)
+if leakedbytes == 0:
+	print("OK")
+else:
+	print("Memory leak", leakedbytes, "bytes")