--- /dev/null
+/*
+ * Copyright 2008 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.common;
+
+import java.util.Hashtable;
+
+/**
+ * Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1
+ * of ISO 18004.
+ *
+ * @author srowen@google.com (Sean Owen)
+ */
+public final class CharacterSetECI extends ECI {
+
+ private static final Hashtable VALUE_TO_ECI;
+ static {
+ VALUE_TO_ECI = new Hashtable(29);
+ // TODO figure out if these values are even right!
+ addCharacterSet(0, "Cp437");
+ addCharacterSet(1, "ISO8859_1");
+ addCharacterSet(2, "Cp437");
+ addCharacterSet(3, "ISO8859_1");
+ addCharacterSet(4, "ISO8859_2");
+ addCharacterSet(5, "ISO8859_3");
+ addCharacterSet(6, "ISO8859_4");
+ addCharacterSet(7, "ISO8859_5");
+ addCharacterSet(8, "ISO8859_6");
+ addCharacterSet(9, "ISO8859_7");
+ addCharacterSet(10, "ISO8859_8");
+ addCharacterSet(11, "ISO8859_9");
+ addCharacterSet(12, "ISO8859_10");
+ addCharacterSet(13, "ISO8859_11");
+ addCharacterSet(15, "ISO8859_13");
+ addCharacterSet(16, "ISO8859_14");
+ addCharacterSet(17, "ISO8859_15");
+ addCharacterSet(18, "ISO8859_16");
+ addCharacterSet(20, "SJIS");
+ }
+
+ private final String encodingName;
+
+ private CharacterSetECI(int value, String encodingName) {
+ super(value);
+ this.encodingName = encodingName;
+ }
+
+ public String getEncodingName() {
+ return encodingName;
+ }
+
+ private static void addCharacterSet(int value, String encodingName) {
+ VALUE_TO_ECI.put(new Integer(value), new CharacterSetECI(value, encodingName));
+ }
+
+ public static CharacterSetECI getCharacterSetECIByValue(int value) {
+ CharacterSetECI eci = (CharacterSetECI) VALUE_TO_ECI.get(new Integer(value));
+ if (eci == null) {
+ throw new IllegalArgumentException("Unsupported value: " + value);
+ }
+ return eci;
+ }
+
+}
\ No newline at end of file
--- /dev/null
+/*
+ * Copyright 2008 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.common;
+
+/**
+ * Superclass of classes encapsulating types ECIs, according to "Extended Channel Interpretations" 5.3
+ * of ISO 18004.
+ *
+ * @author srowen@google.com (Sean Owen)
+ */
+public abstract class ECI {
+
+ private final int value;
+
+ ECI(int value) {
+ this.value = value;
+ }
+
+ public int getValue() {
+ return value;
+ }
+
+ public static ECI getECIByValue(int value) {
+ if (value < 0 || value > 999999) {
+ throw new IllegalArgumentException("Bad ECI value: " + value);
+ }
+ if (value < 900) { // Character set ECIs use 000000 - 000899
+ return CharacterSetECI.getCharacterSetECIByValue(value);
+ }
+ throw new IllegalArgumentException("Unsupported ECI value: " + value);
+ }
+
+}
import com.google.zxing.ReaderException;
import com.google.zxing.common.BitSource;
+import com.google.zxing.common.CharacterSetECI;
import java.io.UnsupportedEncodingException;
fc1InEffect = true;
} else if (mode.equals(Mode.ECI)) {
// Count doesn't apply to ECI
- int value = ECI.parseECI(bits);
+ int value = parseECIValue(bits);
try {
currentCharacterSetECI = CharacterSetECI.getCharacterSetECIByValue(value);
} catch (IllegalArgumentException iae) {
}
return canBeISO88591 ? ISO88591 : SHIFT_JIS;
}
+
+ private static int parseECIValue(BitSource bits) {
+ int firstByte = bits.readBits(8);
+ if ((firstByte & 0x80) == 0) {
+ // just one byte
+ return firstByte & 0x7F;
+ } else if ((firstByte & 0xC0) == 0x80) {
+ // two bytes
+ int secondByte = bits.readBits(8);
+ return ((firstByte & 0x3F) << 8) | secondByte;
+ } else if ((firstByte & 0xE0) == 0xC0) {
+ // three bytes
+ int secondThirdBytes = bits.readBits(16);
+ return ((firstByte & 0x1F) << 16) | secondThirdBytes;
+ }
+ throw new IllegalArgumentException("Bad ECI bits starting with byte " + firstByte);
+ }
}