# #################################################################
# 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)