Misra xml output (#1787)

* Add (very) simple XML output support

* Removed xml top and tail, better handled outside

addons/cppcheckdata.py

@@ -808,6 +808,8 @@ def reportError(template, callstack=(), severity='', message='', errorId='', sup
         template = '{file}({line}): {severity}: {message}'
     elif template == 'edit':
         template = '{file} +{line}: {severity}: {message}'
+    elif template == 'xml':
+        return reportErrorXML(callstack, severity, message, errorId, suppressions, outputFunc)
     # compute 'callstack}, {file} and {line} replacements
     stack = ' -> '.join('[' + f + ':' + str(l) + ']' for (f, l) in callstack)
     file = callstack[-1][0]
@@ -822,3 +824,30 @@ def reportError(template, callstack=(), severity='', message='', errorId='', sup
         outputFunc(outputLine)
     # format message
     return outputLine
+
+def reportErrorXML(callstack, severity, message, errorId, suppressions, outputFunc):
+    """
+        Format an error message according to cppcheck's xml format.
+
+        :param callstack: e.g. [['file1.cpp',10],['file2.h','20'], ... ]
+        :param severity: e.g. 'error', 'warning' ...
+        :param id: message ID.
+        :param message: message text.
+    """
+    node = ET.Element("error")
+    if errorId:
+        node.set("id", errorId)
+    if severity:
+        node.set("severity", severity)
+    node.set("msg", message)
+
+    file = callstack[-1][0]
+    line = str(callstack[-1][1])
+    if suppressions is not None and any(suppression.isMatch(file, line, message, errorId) for suppression in suppressions):
+        return None
+
+    for filename, lineno in callstack:
+        location = ET.Element("location", { 'file': filename, 'line': str(lineno) } )
+        node.append(location)
+
+    return ET.tostring(node, encoding="unicode")