#  Utils (c) 2002, 2004, 2007, 2008  David Turner <david@freetype.org>

#

import string, sys, os, glob

# current output directory

#

output_dir = None

# This function is used to sort the index.  It is a simple lexicographical

# sort, except that it places capital letters before lowercase ones.

#

def  index_sort( s1, s2 ):

    if not s1:

        return -1

    if not s2:

        return 1

    l1 = len( s1 )

    l2 = len( s2 )

    m1 = string.lower( s1 )

    m2 = string.lower( s2 )

    for i in range( l1 ):

        if i >= l2 or m1[i] > m2[i]:

            return 1

        if m1[i] < m2[i]:

            return -1

        if s1[i] < s2[i]:

            return -1

        if s1[i] > s2[i]:

            return 1

    if l2 > l1:

        return -1

    return 0

# Sort input_list, placing the elements of order_list in front.

#

def  sort_order_list( input_list, order_list ):

    new_list = order_list[:]

    for id in input_list:

        if not id in order_list:

            new_list.append( id )

    return new_list

# Open the standard output to a given project documentation file.  Use

# "output_dir" to determine the filename location if necessary and save the

# old stdout in a tuple that is returned by this function.

#

def  open_output( filename ):

    global output_dir

    if output_dir and output_dir != "":

        filename = output_dir + os.sep + filename

    old_stdout = sys.stdout

    new_file   = open( filename, "w" )

    sys.stdout = new_file

    return ( new_file, old_stdout )

# Close the output that was returned by "close_output".

#

def  close_output( output ):

    output[0].close()

    sys.stdout = output[1]

# Check output directory.

#

def  check_output():

    global output_dir

    if output_dir:

        if output_dir != "":

            if not os.path.isdir( output_dir ):

                sys.stderr.write( "argument" + " '" + output_dir + "' " + \

                                  "is not a valid directory" )

                sys.exit( 2 )

        else:

            output_dir = None

def  file_exists( pathname ):

    """checks that a given file exists"""

    result = 1

    try:

        file = open( pathname, "r" )

        file.close()

    except:

        result = None

        sys.stderr.write( pathname + " couldn't be accessed\n" )

    return result

def  make_file_list( args = None ):

    """builds a list of input files from command-line arguments"""

    file_list = []

    # sys.stderr.write( repr( sys.argv[1 :] ) + '\n' )

    if not args:

        args = sys.argv[1 :]

    for pathname in args:

        if string.find( pathname, '*' ) >= 0:

            newpath = glob.glob( pathname )

            newpath.sort()  # sort files -- this is important because

                            # of the order of files

        else:

            newpath = [pathname]

        file_list.extend( newpath )

    if len( file_list ) == 0:

        file_list = None

    else:

        # now filter the file list to remove non-existing ones

        file_list = filter( file_exists, file_list )

    return file_list

# eof