Fix comments for af72371db217

MyTracks/src/com/google/android/apps/mytracks/util/FileUtils.java

@@ -32,7 +32,8 @@ import java.util.TimeZone;
 public class FileUtils {
 
   /**
-   * The maximum Fat32 path length.
+   * The maximum Fat32 path length. See
+   * http://www.scribd.com/doc/2187273/FAT32-File-System-Specification
    */
   @VisibleForTesting
   static final int MAX_FAT32_PATH_LENGTH = 260;
@@ -143,12 +144,11 @@ public class FileUtils {
    */
   @VisibleForTesting
   String sanitizeFileName(String name) {
-    StringBuffer buffer = new StringBuffer();
+    StringBuffer buffer = new StringBuffer(name.length());
     for (int i = 0; i < name.length(); i++) {
       int codePoint = name.codePointAt(i);
-      if (codePoint > 127) {
-        buffer.appendCodePoint(codePoint);
-      } else if (Character.isLetterOrDigit(name.charAt(i))) {
+      char character = name.charAt(i);
+      if (Character.isLetterOrDigit(character) || codePoint > 127 || character == '-') {
         buffer.appendCodePoint(codePoint);
       } else {
         buffer.append("_");
@@ -159,7 +159,7 @@ public class FileUtils {
   }
 
   /**
-   * Truncates the name if necessary thus the filename path length (directory +
+   * Truncates the name if necessary so the filename path length (directory +
    * name + suffix) meets the Fat32 path limit.
    *
    * @param directory directory
@@ -168,8 +168,7 @@ public class FileUtils {
    */
   @VisibleForTesting
   String truncateFileName(File directory, String name, String suffix) {
-
-    // 1 at the end accounts for the trailing NUL character
+    // 1 at the end accounts for the FAT32 filename trailing NUL character 
     int requiredLength = directory.getPath().length() + suffix.length() + 1;
     if (name.length() + requiredLength > MAX_FAT32_PATH_LENGTH) {
       int limit = MAX_FAT32_PATH_LENGTH - requiredLength;

MyTracksTest/src/com/google/android/apps/mytracks/util/FileUtilsTest.java

@@ -31,9 +31,6 @@ import junit.framework.TestCase;
  * @author Rodrigo Damazio
  */
 public class FileUtilsTest extends TestCase {
-  private static final String ORIGINAL_NAME = "Swim\10ming-^across: the/ pacific (ocean).";
-  private static final String SANITIZED_NAME = "Swim_ming_across_the_pacific_ocean_";
-
   private FileUtils fileUtils;
   private Set<String> existingFiles;
 
@@ -66,7 +63,10 @@ public class FileUtilsTest extends TestCase {
   }
 
   public void testSanitizeFileName() {
-    assertEquals(SANITIZED_NAME, fileUtils.sanitizeFileName(ORIGINAL_NAME));
+    String name = "Swim\10ming-^across: the/ pacific (ocean).您好-привет_";
+    String expected = "Swim_ming-_across_the_pacific_ocean_您好-привет_";
+    
+    assertEquals(expected, fileUtils.sanitizeFileName(name));
   }
 
   public void testTruncateFileName() {
@@ -78,16 +78,10 @@ public class FileUtilsTest extends TestCase {
     }
     String nameString = new String(name);
     
-    int expectedLength = FileUtils.MAX_FAT32_PATH_LENGTH - directory.getPath().length()
-        - suffix.length() - 1;
-    char[] expected = new char[expectedLength];
-    for (int i = 0; i < expected.length; i++) {
-      expected[i] = 'a';
-    }
-    String expectedString = new String(expected);
-    
     String truncated = fileUtils.truncateFileName(directory, nameString, suffix);
-    assertEquals(expectedString, truncated);
+    for (int i = 0; i < truncated.length(); i++) {
+      assertEquals('a', truncated.charAt(i));
+    }
     assertEquals(FileUtils.MAX_FAT32_PATH_LENGTH,
         new File(directory, truncated + suffix).getPath().length());
   }