function makepatch()
{
    # remember current directory
    cwd=$(pwd);

    # check how many lines of unified context should be created
    if [ $# -eq 0 ]; then
        return;
    elif [ $# -eq 1 ]; then
        lines=5;
    else
        lines=$2;
    fi

    # create patch
    cd0adsvn;
    svn diff --diff-cmd diff -x "-p -U$lines" . > /media/tmpfs2/patch

    # restore current directory
    cd "$cwd";
}

function checkPatch()
{
    # whitespace
    grep -n -P '^\+.*[[:blank:]]$' $1       # trailing whitespace
    grep -n -P '^\+.*\ \t' $1           # mixed whitespace
    # TODO: prohibit spaces before the first letter
    # TODO: warn if too many tabs are found

    # space in loops
    grep -n -P '^\+.*for\(' $1          # for(
    grep -n -P '^\+.*if\(' $1           # if(
    grep -n -P '^\+.*switch\(' $1           # switch(
    grep -n -P '^\+.*while\(' $1            # while(
    grep -n '\ No newline at end of file' $1    # file should end with newline

    # check that objects have spaces like { this }
    grep -n -P '^\+.*\{"' $1            # {"
    grep -n -P '^\+.*\)\}' $1           # )}
    grep -n -P '^\+.*\}\}' $1           # }}

    # Use unary plus instead of parseInt
    # both evaluate to NaN in case
    grep -n -P '^\+.*ParseInt\(' $1         # ParseInt

    # Use for ... of and for ... in
    # instead of for each
    grep -n -P '^\+.*for each' $1           # for each

    # Use fat arrow functions instead of inline functions
    grep -n -P '^\+.*function.*\{' $1

    ####################################
    # C++

    # CStr and CStrW should be used
    # instead of std::string and std::wstring
    grep -n -P '^\+.*std::string' $1        # CStr
    grep -n -P '^\+.*std::wstring' $1       # CStrW

}