#append ASCIIfiles

#author: Felix Boehmer

import glob, sys, os

options = ["-f","-of"]
opts = set(options)
pattern = ".dat"

def getArgsToNextOpt(stringlist, index) :
    id = index+1
    args = []
    while(id < len(stringlist)):
        if stringlist[id] in options:
            return args
        args.append(stringlist[id])
        id+=1
    return args    


def cmpDevMapFiles(string1, string2) :
    num1 = (int)(string1[string1.find(pattern)+len(pattern):])
    num2 = (int)(string2[string2.find(pattern)+len(pattern):])
    return num1 - num2  



for iarg in range(len(sys.argv)) :
    arg = sys.argv[iarg]
    if arg == "-f":   
        files = getArgsToNextOpt(sys.argv,iarg)
    if arg == "-of":
        outfiles = getArgsToNextOpt(sys.argv,iarg)
        if len(outfiles) > 1 :
            print "ERROR: Invalid output file!"
            print outfile
            exit
        outfile = outfiles[0]    
        outfilegiven = 1    

if not outfilegiven:
    print "ERROR: No output file was given!"
    exit        

files = sorted(files,cmpDevMapFiles)

for f in files:
    print f
print

ofile = open(outfile,"w")

fcounter = 0
for f in files :
    ifile = open(f, "r")
    for l in ifile:
        ofile.write(l)
        
ofile.close()