util/VFile.java

   1
   2 package org.de.metux.util;
   3
   4 import java.io.File;
   5
   6 /*
   7     states which the file can have:
   8
   9     + VFile   current_root      -> beyond which root are we working ?
  10     + boolean allow_breakout    -> are we allowed to break out of the root ?
  11     +
  12
  13
  14 */
  15
  16 public class VFile
  17 {
  18     String root;
  19     String workdir;
  20     String filename;
  21
  22     public static String normalize_filename(String name)
  23     {
  24         boolean absolute = name.startsWith("/");
  25         boolean dirname  = name.endsWith("/");
  26
  27         String splitted[] = name.split("\\/");
  28         String newstr[]   = new String[splitted.length];
  29
  30         int y=0;
  31         for (int x=0; x<splitted.length; x++)
  32         {
  33             String e = splitted[x];
  34             if ((e==null)||(e.equals("")||e.equals("."))) ;
  35             else if (e.equals(".."))
  36             {
  37                 if (y>0)
  38                     y--;
  39                 else
  40                     newstr[y++] = "..";
  41             }
  42             else
  43                 newstr[y++] = e;
  44         }
  45
  46         if (y==0)
  47             return ((absolute||dirname) ? "/" : "");
  48
  49         String str = (absolute ? "/" : "")+newstr[0];
  50         for (int x=1; x<y; x++)
  51             str += "/"+newstr[x];
  52
  53         if (dirname)
  54             str += "/";
  55
  56         return str;
  57     }
  58 }