python-labvolt-data/openTbl.py at master · stenius/python-labvolt-data · GitHub

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from struct import unpack,unpack_from
import sys
def readLabVoltTBL(fileName):
    fid = open(fileName,'rb')
    ind = 128
    fid.seek(ind)
    a = unpack('c',fid.read(1))[0]
    while a>chr(12):
        ind += 1
        a = unpack('c',fid.read(1))[0]
    ind += 1
    a = unpack('c',fid.read(1))[0]
    while a>chr(12):
        ind += 1
        a = unpack('c',fid.read(1))[0]

    d_count = 1
    fcon =1
    ind += 36
    while fcon == 1:
        fid.seek(ind)
        marker1 = unpack('B',fid.read(1))[0]
        marker2 = unpack('B',fid.read(1))[0]
        if marker1 == 0 and marker2 == 75:
            fcon = 0
        else:
            d_count += 1
            ind += 12
    ind = 122
    data = []
    labels = []
    fcon = 1;
    output = []
    while fcon == 1:
        fid.seek(ind)
        marker1 = unpack('B',fid.read(1))[0]
        marker2 = unpack('B',fid.read(1))[0]
        if marker1 == 0 and marker2 == 75:
            out = []
            ind = ind + 6
            fid.seek(ind)
            units = ''
            a = unpack('c',fid.read(1))[0]
            while a > chr(12):
                units += a
                ind += 1
                a = unpack('c',fid.read(1))[0]
            ind += 1
            chann = '';
            a = unpack('c',fid.read(1))[0]
            while a > chr(12):
                chann += a
                ind += 1
                a = unpack('c',fid.read(1))[0]
            labels.append((chann + ',' + units))
            ind += 17
            #start aquiring data entries
            for x in range(0,d_count):
                fid.seek(ind)
                aux = unpack('d',fid.read(8))[0]
                if abs(aux) < 10**-150:
                    aux=0
                out.append(aux)
                ind += 12
            out.reverse()
            output.append(out)
            ind +=7
        else:
            fcon = 0
    out= map(lambda *row: list(row), *output )
    return labels, out
def usage():
    print 'usage: '+sys.argv[0] + ' [option] ... -i inputFile ...'
    print 'Options and arguments (and corresponding environment variables):'
    print '-h\t: Help'
    print '-i file\t: Input File'
    print '-t\t: Display Titles'

if __name__ == '__main__':
    import getopt
    input_file = ''
    titles_on = False
    CSV = False
    try: opts, args = getopt.getopt(sys.argv[1:], "htci:",
            ['help','csv','input=', 'titles'])
    except getopt.GetoptError, err:
        print str(err)
        usage()
        sys.exit(2)
    for o,a in opts:
        if o in ('-h','--help'):
            usage()
            sys.exit()
        elif o in ('-c','--csv'):
            CSV = False
            print 'not printing csv, broken'
        elif o in ('-i','--input'):
            input_file = a
        elif o in ('-t','--titles'):
            titles_on = True
        else:
            assert False, "unhanded option"
    if not input_file:
            print 'need input file'
            usage()
            sys.exit(3)
    labels, out = readLabVoltTBL(input_file)
    if not CSV:
        if titles_on:
            for label in labels:
                print label,'\t',
        print ''
        for x in out:
            for y in x:
                print y,'\t',
            print '\n',
    else:
        if titles_on:
            for label in labels:
                print label,',',
        print ''
        for x in out:
            for y in x:
                print y,',',
            print '\n',