srcanamdw/codescanner/scripts/trapeleave.py
changeset 1 22878952f6e2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/srcanamdw/codescanner/scripts/trapeleave.py	Thu Feb 18 12:29:02 2010 +0530
@@ -0,0 +1,69 @@
+# #################################################################
+# Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+# 
+# * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+# * Neither the name of Nokia Corporation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.#
+#
+# trapeleave.py
+#
+# Checks : Trapping new(ELeave).
+#
+# Reason : The trapping of a "new(ELeave) CXxx" call is redundant 
+# and wasteful as the code to support TRAP is surprisingly large. 
+# If the instantiation process really needs not to leave, use 
+# "new CXxx" and check for NULL.
+#
+# #################################################################
+
+script = CScript("trapeleave")
+script.iReString = "^\s*TRAPD?"
+script.iFileExts = ["cpp"]
+script.iCategory = KCategoryPerformance
+script.iIgnore = KIgnoreCommentsAndQuotes
+script.iSeverity = KSeverityMedium
+
+reELeave = re.compile("""
+    new
+    \s*        # whitespace
+    \(         # open bracket
+    \s*        # whitespace
+    ELeave
+    \s*        # whitespace
+    \)         # close bracket
+""", re.VERBOSE)
+
+def trapeleavecompare(lines, currentline, rematch, filename):
+    line = lines[currentline]
+    m = rematch.search(line)
+    if m:
+        if (line.find("(") == -1) and (currentline + 1 < len(lines)):
+            currentline += 1
+            line = lines[currentline]
+
+        bracketCount = line.count("(") - line.count(")")
+        found = reELeave.search(line) 
+
+        while (bracketCount > 0) and (currentline + 1 < len(lines)):
+            currentline += 1
+            line = lines[currentline]
+            bracketCount += line.count("(") - line.count(")")
+            if not found:
+                found = reELeave.search(line) 
+
+        if found:
+            return 1
+
+    return 0
+
+script.iCompare = trapeleavecompare
+scanner.AddScript(script)