addons/metrics: Add simple script for generating some metrics

addons/metrics.py

@@ -0,0 +1,63 @@
+# Rough metrics
+#
+# complexity is calculated according to the "shortcut" here:
+# https://stackoverflow.com/questions/9097987/calculation-of-cyclomatic-complexity
+
+import cppcheckdata
+import sys
+
+class FunctionMetrics:
+    lines = 0
+    complexity = 0
+
+def getMetrics(data):
+    variables = {}
+    functions = {}
+    for cfg in data.configurations:
+        for func in cfg.functions:
+            if func.tokenDef is None:
+                continue
+            location = func.tokenDef.file + ':' + str(func.tokenDef.linenr)
+            print('name:'+func.name)
+            print('  location:' + location)
+            
+            indent = 0
+            lines = 0
+            complexity = 0
+            tok = func.tokenDef
+            while tok:
+                #print(tok.str)
+                if tok.str == '{':
+                    indent = indent + 1
+                    if indent > 1:
+                        lines = lines + 1
+                    complexity = complexity + 1
+                elif tok.str == '}':
+                    indent = indent - 1
+                    if indent < 1:
+                        break
+                elif tok.str == ';':
+                    if indent <= 0:
+                        break
+                    lines = lines + 1
+                elif tok.str == '(':
+                    tokens = [tok.astOperand2]
+                    while len(tokens) > 0:
+                        tok2 = tokens.pop()
+                        if tok2 is None:
+                            continue
+                        if tok2.str != '&&' and tok2.str != '||':
+                            continue
+                        complexity = complexity + 1
+                        tokens.append(tok2.astOperand1)
+                        tokens.append(tok2.astOperand2)
+                    tok = tok.link
+                tok = tok.next
+
+            print('  lines:' + str(lines))
+            print('  complexity:' + str(complexity))
+    return
+
+for arg in sys.argv[1:]:
+    data = cppcheckdata.parsedump(arg)
+    getMetrics(data)

addons/test/metrics-test.c

@@ -0,0 +1,12 @@
+
+// complexity is measured according to the "shortcut" here:
+// https://stackoverflow.com/questions/9097987/calculation-of-cyclomatic-complexity
+
+void test1(int x) { // lines:2 complexity:3
+  if (x>0) {}
+  if (x<10) {}
+}
+
+void test2(int x) { // lines:1 complexity:3
+    if (x>0 && x<10) {}
+}