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[github-198] Remove jdk.charset module dependency for spreadsheets ge…
…neration. Thanks to Robert Marcano. This closes #198 git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1884631 13f79535-47bb-0310-9956-ffa450edef68
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src/scratchpad/src/org/apache/poi/hwpf/util/DoubleByteUtil.java
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/* ==================================================================== | ||
Licensed to the Apache Software Foundation (ASF) under one or more | ||
contributor license agreements. See the NOTICE file distributed with | ||
this work for additional information regarding copyright ownership. | ||
The ASF licenses this file to You 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. | ||
==================================================================== */ | ||
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package org.apache.poi.hwpf.util; | ||
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import java.nio.charset.Charset; | ||
import java.util.Collections; | ||
import java.util.Set; | ||
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/** | ||
* Utilities for working with double byte CodePages. | ||
* | ||
* <p>Provides constants for understanding numeric codepages, | ||
* along with utilities to translate these into Java Character Sets.</p> | ||
*/ | ||
public class DoubleByteUtil | ||
{ | ||
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public static final Charset BIG5 = Charset.forName("Big5"); | ||
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public static final Set<Charset> DOUBLE_BYTE_CHARSETS = Collections.singleton(BIG5); | ||
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/** | ||
* This tries to convert a LE byte array in cp950 | ||
* (Microsoft's dialect of Big5) to a String. | ||
* We know MS zero-padded ascii, and we drop those. | ||
* There may be areas for improvement in this. | ||
* | ||
* @param data | ||
* @param offset | ||
* @param lengthInBytes | ||
* @return Decoded String | ||
*/ | ||
public static String cp950ToString(byte[] data, int offset, int lengthInBytes) { | ||
StringBuilder sb = new StringBuilder(); | ||
LittleEndianCP950Reader reader = new LittleEndianCP950Reader(data, offset, lengthInBytes); | ||
int c = reader.read(); | ||
while (c != -1) { | ||
sb.append((char)c); | ||
c = reader.read(); | ||
} | ||
reader.close(); | ||
return sb.toString(); | ||
} | ||
} |
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