Removes base64 encoding code from LongLib.

The code was only used from GWT-RPC client-side and
already copied there.

Change-Id: I1451678542580395fa3fcc199472cbaed72ef9a8

Author: gkdn

dev/core/super/com/google/gwt/lang/LongLib.java

@@ -187,22 +187,6 @@ public static boolean gte(LongEmul a, LongEmul b) {
     }
   }
 
-  /**
-   * Parse a string containing a base-64 encoded version of a long value.
-   *
-   * Keep this synchronized with the version in Base64Utils.
-   */
-  public static long longFromBase64(String value) {
-    int pos = 0;
-    long longVal = base64Value(value.charAt(pos++));
-    int len = value.length();
-    while (pos < len) {
-      longVal <<= 6;
-      longVal |= base64Value(value.charAt(pos++));
-    }
-    return longVal;
-  }
-
   public static boolean lt(LongEmul a, LongEmul b) {
     return !gte(a, b);
   }
@@ -402,34 +386,6 @@ public static LongEmul sub(LongEmul a, LongEmul b) {
     return create(sum0 & MASK, sum1 & MASK, sum2 & MASK_2);
   }
 
-  /**
-   * Return an optionally single-quoted string containing a base-64 encoded
-   * version of the given long value.
-   *
-   * Keep this synchronized with the version in Base64Utils.
-   */
-  public static String toBase64(long value) {
-    // Convert to ints early to avoid need for long ops
-    int low = (int) (value & 0xffffffff);
-    int high = (int) (value >> 32);
-
-    StringBuilder sb = new StringBuilder();
-    boolean haveNonZero = base64Append(sb, (high >> 28) & 0xf, false);
-    haveNonZero = base64Append(sb, (high >> 22) & 0x3f, haveNonZero);
-    haveNonZero = base64Append(sb, (high >> 16) & 0x3f, haveNonZero);
-    haveNonZero = base64Append(sb, (high >> 10) & 0x3f, haveNonZero);
-    haveNonZero = base64Append(sb, (high >> 4) & 0x3f, haveNonZero);
-    int v = ((high & 0xf) << 2) | ((low >> 30) & 0x3);
-    haveNonZero = base64Append(sb, v, haveNonZero);
-    haveNonZero = base64Append(sb, (low >> 24) & 0x3f, haveNonZero);
-    haveNonZero = base64Append(sb, (low >> 18) & 0x3f, haveNonZero);
-    haveNonZero = base64Append(sb, (low >> 12) & 0x3f, haveNonZero);
-    base64Append(sb, (low >> 6) & 0x3f, haveNonZero);
-    base64Append(sb, low & 0x3f, true);
-
-    return sb.toString();
-  }
-
   public static double toDouble(LongEmul a) {
     if (LongLib.lt(a, Const.ZERO)) {
       return -toDoubleHelper(LongLib.neg(a));
@@ -486,48 +442,6 @@ public static LongEmul xor(LongEmul a, LongEmul b) {
     return create(getL(a) ^ getL(b), getM(a) ^ getM(b), getH(a) ^ getH(b));
   }
 
-  private static boolean base64Append(StringBuilder sb, int digit,
-      boolean haveNonZero) {
-    if (digit > 0) {
-      haveNonZero = true;
-    }
-    if (haveNonZero) {
-      int c;
-      if (digit < 26) {
-        c = 'A' + digit;
-      } else if (digit < 52) {
-        c = 'a' + digit - 26;
-      } else if (digit < 62) {
-        c = '0' + digit - 52;
-      } else if (digit == 62) {
-        c = '$';
-      } else {
-        c = '_';
-      }
-      sb.append((char) c);
-    }
-    return haveNonZero;
-  }
-
-  // Assume digit is one of [A-Za-z0-9$_]
-  private static int base64Value(char digit) {
-    if (digit >= 'A' && digit <= 'Z') {
-      return digit - 'A';
-    }
-    // No need to check digit <= 'z'
-    if (digit >= 'a') {
-      return digit - 'a' + 26;
-    }
-    if (digit >= '0' && digit <= '9') {
-      return digit - '0' + 52;
-    }
-    if (digit == '$') {
-      return 62;
-    }
-    // digit == '_'
-    return 63;
-  }
-
   /**
    * Not instantiable.
    */

dev/core/test/com/google/gwt/lang/LongLibTest.java

@@ -424,41 +424,6 @@ public static void testAnd() {
     doTestBinary(OP_AND);
   }
 
-  public static void testBase64() {
-    assertEquals("A", LongLib.toBase64(0x0L));
-    assertEquals(0x0L, LongLib.longFromBase64("A"));
-
-    assertEquals("B", LongLib.toBase64(0x1L));
-    assertEquals(0x1L, LongLib.longFromBase64("B"));
-
-    assertEquals("BA", LongLib.toBase64(0x40L));
-    assertEquals(0x40L, LongLib.longFromBase64("BA"));
-
-    assertEquals("P_________A", LongLib.toBase64(-0x40L));
-    assertEquals(-0x40L, LongLib.longFromBase64("P_________A"));
-
-    assertEquals("P__________", LongLib.toBase64(-1L));
-    assertEquals(-1L, LongLib.longFromBase64("P__________"));
-
-    // Use all types of base 64 chars
-    long value = 0L;
-    value |= 15L << 60; // 'P'
-    value |= 35L << 54; // 'j'
-    value |= 44L << 48; // 's'
-    value |= 62L << 42; // '$'
-    value |= 26L << 36; // 'a'
-    value |=  9L << 30; // 'J'
-    value |= 18L << 24; // 'S'
-    value |= 25L << 18; // 'Z'
-    value |= 52L << 12; // '0'
-    value |= 57L << 6;  // '5'
-    value |= 63L;       // '_'
-
-    String s = "Pjs$aJSZ05_";
-    assertEquals(s, LongLib.toBase64(value));
-    assertEquals(value, LongLib.longFromBase64(s));
-  }
-
   public static void testCompare() {
     doTestCompare(OP_COMPARE);
   }