NativeConverter.java revision 1bdc6bc1c72b033ed860360e69fc9f1f1121579b 
1/**
2*******************************************************************************
3* Copyright (C) 1996-2006, International Business Machines Corporation and    *
4* others. All Rights Reserved.                                                *
5*******************************************************************************
6*
7*******************************************************************************
8*/
9
10package libcore.icu;
11
12import libcore.util.NativeAllocationRegistry;
13
14import java.nio.charset.Charset;
15import java.nio.charset.CharsetDecoder;
16import java.nio.charset.CharsetEncoder;
17import java.nio.charset.CodingErrorAction;
18
19public final class NativeConverter {
20    private static final NativeAllocationRegistry registry = new NativeAllocationRegistry(
21            getNativeFinalizer(), getNativeSize());
22
23    public static native int decode(long converterHandle, byte[] input, int inEnd,
24            char[] output, int outEnd, int[] data, boolean flush);
25
26    public static native int encode(long converterHandle, char[] input, int inEnd,
27            byte[] output, int outEnd, int[] data, boolean flush);
28
29    public static native long openConverter(String charsetName);
30    public static native void closeConverter(long converterHandle);
31
32    public static void registerConverter(Object referrent, long converterHandle) {
33        registry.registerNativeAllocation(referrent, converterHandle);
34    }
35
36    public static native void resetByteToChar(long converterHandle);
37    public static native void resetCharToByte(long converterHandle);
38
39    public static native byte[] getSubstitutionBytes(long converterHandle);
40
41    public static native int getMaxBytesPerChar(long converterHandle);
42    public static native int getMinBytesPerChar(long converterHandle);
43    public static native float getAveBytesPerChar(long converterHandle);
44    public static native float getAveCharsPerByte(long converterHandle);
45
46    public static native boolean contains(String converterName1, String converterName2);
47
48    public static native String[] getAvailableCharsetNames();
49    public static native Charset charsetForName(String charsetName);
50
51    // Translates from Java's enum to the magic numbers #defined in "NativeConverter.cpp".
52    private static int translateCodingErrorAction(CodingErrorAction action) {
53        if (action == CodingErrorAction.REPORT) {
54            return 0;
55        } else if (action == CodingErrorAction.IGNORE) {
56            return 1;
57        } else if (action == CodingErrorAction.REPLACE) {
58            return 2;
59        } else {
60            throw new AssertionError(); // Someone changed the enum.
61        }
62    }
63
64    public static void setCallbackDecode(long converterHandle, CharsetDecoder decoder) {
65        setCallbackDecode(converterHandle,
66                          translateCodingErrorAction(decoder.malformedInputAction()),
67                          translateCodingErrorAction(decoder.unmappableCharacterAction()),
68                          decoder.replacement());
69    }
70    private static native void setCallbackDecode(long converterHandle, int onMalformedInput, int onUnmappableInput, String subChars);
71
72    public static void setCallbackEncode(long converterHandle, CharsetEncoder encoder) {
73        setCallbackEncode(converterHandle,
74                          translateCodingErrorAction(encoder.malformedInputAction()),
75                          translateCodingErrorAction(encoder.unmappableCharacterAction()),
76                          encoder.replacement());
77    }
78    private static native void setCallbackEncode(long converterHandle, int onMalformedInput, int onUnmappableInput, byte[] subBytes);
79
80    public static native long getNativeFinalizer();
81    public static native long getNativeSize();
82}
83