1 files changed, 117 insertions, 0 deletions
diff --git a/OpenPGP-Keychain/src/com/google/zxing/qrcode/decoder/Mode.java b/OpenPGP-Keychain/src/com/google/zxing/qrcode/decoder/Mode.java
new file mode 100644
index 000000000..3c66217d3
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+++ b/OpenPGP-Keychain/src/com/google/zxing/qrcode/decoder/Mode.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.zxing.qrcode.decoder;
+
+/**
+ * <p>See ISO 18004:2006, 6.4.1, Tables 2 and 3. This enum encapsulates the various modes in which
+ * data can be encoded to bits in the QR code standard.</p>
+ *
+ * @author Sean Owen
+ */
+public final class Mode {
+
+  // No, we can't use an enum here. J2ME doesn't support it.
+
+  public static final Mode TERMINATOR = new Mode(new int[]{0, 0, 0}, 0x00, "TERMINATOR"); // Not really a mode...
+  public static final Mode NUMERIC = new Mode(new int[]{10, 12, 14}, 0x01, "NUMERIC");
+  public static final Mode ALPHANUMERIC = new Mode(new int[]{9, 11, 13}, 0x02, "ALPHANUMERIC");
+  public static final Mode STRUCTURED_APPEND = new Mode(new int[]{0, 0, 0}, 0x03, "STRUCTURED_APPEND"); // Not supported
+  public static final Mode BYTE = new Mode(new int[]{8, 16, 16}, 0x04, "BYTE");
+  public static final Mode ECI = new Mode(null, 0x07, "ECI"); // character counts don't apply
+  public static final Mode KANJI = new Mode(new int[]{8, 10, 12}, 0x08, "KANJI");
+  public static final Mode FNC1_FIRST_POSITION = new Mode(null, 0x05, "FNC1_FIRST_POSITION");
+  public static final Mode FNC1_SECOND_POSITION = new Mode(null, 0x09, "FNC1_SECOND_POSITION");
+  /** See GBT 18284-2000; "Hanzi" is a transliteration of this mode name. */
+  public static final Mode HANZI = new Mode(new int[]{8, 10, 12}, 0x0D, "HANZI");
+
+  private final int[] characterCountBitsForVersions;
+  private final int bits;
+  private final String name;
+
+  private Mode(int[] characterCountBitsForVersions, int bits, String name) {
+    this.characterCountBitsForVersions = characterCountBitsForVersions;
+    this.bits = bits;
+    this.name = name;
+  }
+
+  /**
+   * @param bits four bits encoding a QR Code data mode
+   * @return Mode encoded by these bits
+   * @throws IllegalArgumentException if bits do not correspond to a known mode
+   */
+  public static Mode forBits(int bits) {
+    switch (bits) {
+      case 0x0:
+        return TERMINATOR;
+      case 0x1:
+        return NUMERIC;
+      case 0x2:
+        return ALPHANUMERIC;
+      case 0x3:
+        return STRUCTURED_APPEND;
+      case 0x4:
+        return BYTE;
+      case 0x5:
+        return FNC1_FIRST_POSITION;
+      case 0x7:
+        return ECI;
+      case 0x8:
+        return KANJI;
+      case 0x9:
+        return FNC1_SECOND_POSITION;
+      case 0xD:
+    	  // 0xD is defined in GBT 18284-2000, may not be supported in foreign country
+        return HANZI;
+      default:
+        throw new IllegalArgumentException();
+    }
+  }
+
+  /**
+   * @param version version in question
+   * @return number of bits used, in this QR Code symbol {@link Version}, to encode the
+   *         count of characters that will follow encoded in this Mode
+   */
+  public int getCharacterCountBits(Version version) {
+    if (characterCountBitsForVersions == null) {
+      throw new IllegalArgumentException("Character count doesn't apply to this mode");
+    }
+    int number = version.getVersionNumber();
+    int offset;
+    if (number <= 9) {
+      offset = 0;
+    } else if (number <= 26) {
+      offset = 1;
+    } else {
+      offset = 2;
+    }
+    return characterCountBitsForVersions[offset];
+  }
+
+  public int getBits() {
+    return bits;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public String toString() {
+    return name;
+  }
+
+}