1 files changed, 0 insertions, 192 deletions
diff --git a/OpenPGP-Keychain/src/com/google/zxing/common/StringUtils.java b/OpenPGP-Keychain/src/com/google/zxing/common/StringUtils.java
deleted file mode 100644
index 97999f997..000000000
--- a/OpenPGP-Keychain/src/com/google/zxing/common/StringUtils.java
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * Copyright (C) 2010 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;
-
-import com.google.zxing.DecodeHintType;
-
-/**
- * Common string-related functions.
- *
- * @author Sean Owen
- */
-public final class StringUtils {
-
-  private static final String PLATFORM_DEFAULT_ENCODING =
-      System.getProperty("file.encoding");
-  public static final String SHIFT_JIS = "SJIS";
-  public static final String GB2312 = "GB2312";
-  private static final String EUC_JP = "EUC_JP";
-  private static final String UTF8 = "UTF8";
-  private static final String ISO88591 = "ISO8859_1";
-  private static final boolean ASSUME_SHIFT_JIS =
-      SHIFT_JIS.equalsIgnoreCase(PLATFORM_DEFAULT_ENCODING) ||
-      EUC_JP.equalsIgnoreCase(PLATFORM_DEFAULT_ENCODING);
-
-  private StringUtils() {}
-
-  /**
-   * @param bytes bytes encoding a string, whose encoding should be guessed
-   * @param hints decode hints if applicable
-   * @return name of guessed encoding; at the moment will only guess one of:
-   *  {@link #SHIFT_JIS}, {@link #UTF8}, {@link #ISO88591}, or the platform
-   *  default encoding if none of these can possibly be correct
-   */
-  public static String guessEncoding(byte[] bytes, Hashtable hints) {
-    if (hints != null) {
-      String characterSet = (String) hints.get(DecodeHintType.CHARACTER_SET);
-      if (characterSet != null) {
-        return characterSet;
-      }
-    }
-    // Does it start with the UTF-8 byte order mark? then guess it's UTF-8
-    if (bytes.length > 3 &&
-        bytes[0] == (byte) 0xEF &&
-        bytes[1] == (byte) 0xBB &&
-        bytes[2] == (byte) 0xBF) {
-      return UTF8;
-    }
-    // For now, merely tries to distinguish ISO-8859-1, UTF-8 and Shift_JIS,
-    // which should be by far the most common encodings. ISO-8859-1
-    // should not have bytes in the 0x80 - 0x9F range, while Shift_JIS
-    // uses this as a first byte of a two-byte character. If we see this
-    // followed by a valid second byte in Shift_JIS, assume it is Shift_JIS.
-    // If we see something else in that second byte, we'll make the risky guess
-    // that it's UTF-8.
-    int length = bytes.length;
-    boolean canBeISO88591 = true;
-    boolean canBeShiftJIS = true;
-    boolean canBeUTF8 = true;
-    int utf8BytesLeft = 0;
-    int maybeDoubleByteCount = 0;
-    int maybeSingleByteKatakanaCount = 0;
-    boolean sawLatin1Supplement = false;
-    boolean sawUTF8Start = false;
-    boolean lastWasPossibleDoubleByteStart = false;
-
-    for (int i = 0;
-         i < length && (canBeISO88591 || canBeShiftJIS || canBeUTF8);
-         i++) {
-
-      int value = bytes[i] & 0xFF;
-
-      // UTF-8 stuff
-      if (value >= 0x80 && value <= 0xBF) {
-        if (utf8BytesLeft > 0) {
-          utf8BytesLeft--;
-        }
-      } else {
-        if (utf8BytesLeft > 0) {
-          canBeUTF8 = false;
-        }
-        if (value >= 0xC0 && value <= 0xFD) {
-          sawUTF8Start = true;
-          int valueCopy = value;
-          while ((valueCopy & 0x40) != 0) {
-            utf8BytesLeft++;
-            valueCopy <<= 1;
-          }
-        }
-      }
-
-      // ISO-8859-1 stuff
-
-      if ((value == 0xC2 || value == 0xC3) && i < length - 1) {
-        // This is really a poor hack. The slightly more exotic characters people might want to put in
-        // a QR Code, by which I mean the Latin-1 supplement characters (e.g. u-umlaut) have encodings
-        // that start with 0xC2 followed by [0xA0,0xBF], or start with 0xC3 followed by [0x80,0xBF].
-        int nextValue = bytes[i + 1] & 0xFF;
-        if (nextValue <= 0xBF &&
-            ((value == 0xC2 && nextValue >= 0xA0) || (value == 0xC3 && nextValue >= 0x80))) {
-          sawLatin1Supplement = true;
-        }
-      }
-      if (value >= 0x7F && value <= 0x9F) {
-        canBeISO88591 = false;
-      }
-
-      // Shift_JIS stuff
-
-      if (value >= 0xA1 && value <= 0xDF) {
-        // count the number of characters that might be a Shift_JIS single-byte Katakana character
-        if (!lastWasPossibleDoubleByteStart) {
-          maybeSingleByteKatakanaCount++;
-        }
-      }
-      if (!lastWasPossibleDoubleByteStart &&
-          ((value >= 0xF0 && value <= 0xFF) || value == 0x80 || value == 0xA0)) {
-        canBeShiftJIS = false;
-      }
-      if ((value >= 0x81 && value <= 0x9F) || (value >= 0xE0 && value <= 0xEF)) {
-        // These start double-byte characters in Shift_JIS. Let's see if it's followed by a valid
-        // second byte.
-        if (lastWasPossibleDoubleByteStart) {
-          // If we just checked this and the last byte for being a valid double-byte
-          // char, don't check starting on this byte. If this and the last byte
-          // formed a valid pair, then this shouldn't be checked to see if it starts
-          // a double byte pair of course.
-          lastWasPossibleDoubleByteStart = false;
-        } else {
-          // ... otherwise do check to see if this plus the next byte form a valid
-          // double byte pair encoding a character.
-          lastWasPossibleDoubleByteStart = true;
-          if (i >= bytes.length - 1) {
-            canBeShiftJIS = false;
-          } else {
-            int nextValue = bytes[i + 1] & 0xFF;
-            if (nextValue < 0x40 || nextValue > 0xFC) {
-              canBeShiftJIS = false;
-            } else {
-              maybeDoubleByteCount++;
-            }
-            // There is some conflicting information out there about which bytes can follow which in
-            // double-byte Shift_JIS characters. The rule above seems to be the one that matches practice.
-          }
-        }
-      } else {
-        lastWasPossibleDoubleByteStart = false;
-      }
-    }
-    if (utf8BytesLeft > 0) {
-      canBeUTF8 = false;
-    }
-
-    // Easy -- if assuming Shift_JIS and no evidence it can't be, done
-    if (canBeShiftJIS && ASSUME_SHIFT_JIS) {
-      return SHIFT_JIS;
-    }
-    if (canBeUTF8 && sawUTF8Start) {
-      return UTF8;
-    }
-    // Distinguishing Shift_JIS and ISO-8859-1 can be a little tough. The crude heuristic is:
-    // - If we saw
-    //   - at least 3 bytes that starts a double-byte value (bytes that are rare in ISO-8859-1), or
-    //   - over 5% of bytes could be single-byte Katakana (also rare in ISO-8859-1),
-    // - and, saw no sequences that are invalid in Shift_JIS, then we conclude Shift_JIS
-    if (canBeShiftJIS && (maybeDoubleByteCount >= 3 || 20 * maybeSingleByteKatakanaCount > length)) {
-      return SHIFT_JIS;
-    }
-    // Otherwise, we default to ISO-8859-1 unless we know it can't be
-    if (!sawLatin1Supplement && canBeISO88591) {
-      return ISO88591;
-    }
-    // Otherwise, we take a wild guess with platform encoding
-    return PLATFORM_DEFAULT_ENCODING;
-  }
-
-}