1 files changed, 129 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/io/PlatformHelper.java b/gcc-4.4.3/libjava/classpath/gnu/java/io/PlatformHelper.java
new file mode 100644
index 000000000..96231e1be
--- /dev/null
+++ b/gcc-4.4.3/libjava/classpath/gnu/java/io/PlatformHelper.java
@@ -0,0 +1,129 @@
+/* PlatformHelper.java -- Isolate OS-specific IO helper methods and variables
+   Copyright (C) 1998, 2002, 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.java.io;
+
+/**
+ * We had many changes in File.java, URLStreamHandler.java etc. to handle
+ * path representations on different platforms (Windows/Unix-family).
+ * Finally we'd like to collect all these ad hoc codes into this utility class.
+ *       --Gansha
+ */
+public class PlatformHelper
+{
+  public static final boolean isWindows = System.getProperty("os.name").indexOf("Windows") >= 0;
+  public static final String separator = System.getProperty("file.separator");
+  public static final char separatorChar = separator.charAt(0);
+  public static final String pathSeparator = System.getProperty("path.separator");
+  public static final char pathSeparatorChar = pathSeparator.charAt(0);
+
+  /**
+   * On most platforms 260 is equal or greater than a max path value, 
+   * so we can set the initial buffer size of StringBuffer to half of this value
+   * to improve performance.
+   */
+  public static final int INITIAL_MAX_PATH = 260/2;
+
+  /**
+   * This routine checks the input param "path" whether it begins with root path
+   * prefix.
+   * if not, return 0;
+   * if yes, return the len of root path prefix;
+   *   --for Unix-family platform, root path begins with "/" and len is 1
+   *   --for Windows platform, root path begins with "drive:\\" and len is 3
+   */
+  public static final int beginWithRootPathPrefix(String path)
+  {
+    if (path.startsWith("/") || path.startsWith("\\"))
+      return 1;
+
+    if (!isWindows)
+      return 0;
+
+    if (path.length() > 2
+        && Character.isLetter(path.charAt(0))
+        && path.charAt(1) == ':'
+        && (path.charAt(2) == '/' || path.charAt(2) == '\\'))
+      return 3;
+
+    return 0;
+  }
+
+  /**
+   * This routine checks the input param "path" whether it's root directory.
+   *  --for Unix-family platform, root directory is "/"
+   *  --for Windows platform, root directory is "\\" or "drive:\\".
+   */
+  public static final boolean isRootDirectory(String path)
+  {
+    int len = path.length();
+    return len > 0 && beginWithRootPathPrefix(path) == len;
+  }
+
+  /**
+   * This routine checks whether input param "path" ends with separator
+   */
+  public static final boolean endWithSeparator(String path)
+  {
+    if (path.endsWith("\\") || path.endsWith("/"))
+      return true;
+
+    return false;
+  }
+
+  /**
+   * This routine removes from input param "path" the tail separator if it exists, 
+   * and return the remain part.
+   */
+  public static final String removeTailSeparator(String path)
+  {
+    if (endWithSeparator(path) && !isRootDirectory(path))
+      return path.substring(0, path.length() - 1);
+
+    return path;
+  }
+
+  /**
+   * This routine returns last index of separator in input param "path", 
+   * and return it.
+   */
+  public static final int lastIndexOfSeparator(String path)
+  {
+    return Math.max(path.lastIndexOf("/"), path.lastIndexOf("\\"));
+  }
+
+}