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StringBlock: added support for UTF8 strings (Froyo compatibility).

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This commit is contained in:
Ryszard Wiśniewski 2010-06-03 14:44:50 +02:00
parent 4ea40577bf
commit 1747353955
1 changed files with 32 additions and 4 deletions
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36
src/brut/androlib/res/decoder/StringBlock.java
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@ -44,11 +44,12 @@ public class StringBlock {
int chunkSize = reader.readInt();
int stringCount = reader.readInt();
int styleOffsetCount = reader.readInt();
/*?*/ reader.readInt();
int flags = reader.readInt();
int stringsOffset = reader.readInt();
int stylesOffset = reader.readInt();
StringBlock block = new StringBlock();
block.m_isUTF8 = (flags & UTF8_FLAG) != 0;
block.m_stringOffsets = reader.readIntArray(stringCount);
if (styleOffsetCount != 0) {
block.m_styleOffsets = reader.readIntArray(styleOffsetCount);
@ -91,8 +92,18 @@ public class StringBlock {
return null;
}
int offset = m_stringOffsets[index];
int length = getShort(m_strings, offset);
return decodeString(offset + 2, length * 2);
int length;
if (! m_isUTF8) {
length = getShort(m_strings, offset) * 2;
offset += 2;
} else {
offset += getVarint(m_strings, offset)[1];
int[] varint = getVarint(m_strings, offset);
offset += varint[1];
length = varint[0];
}
return decodeString(offset, length);
}
/**
@ -229,7 +240,7 @@ public class StringBlock {
private String decodeString(int offset, int length) {
try {
return UTF16LE_DECODER.decode(
return (m_isUTF8 ? UTF8_DECODER : UTF16LE_DECODER).decode(
ByteBuffer.wrap(m_strings, offset, length)).toString();
} catch (CharacterCodingException ex) {
LOGGER.log(Level.WARNING, null, ex);
@ -249,13 +260,30 @@ public class StringBlock {
return (value >>> 16);
}
}
private static final int[] getVarint(byte[] array, int offset) {
int val = array[offset];
boolean more = (val & 0x80) != 0;
val &= 0x7f;
if (! more) {
return new int[]{val, 1};
} else {
return new int[]{val << 8 | array[offset + 1] & 0xff, 2};
}
}
private int[] m_stringOffsets;
private byte[] m_strings;
private int[] m_styleOffsets;
private int[] m_styles;
private boolean m_isUTF8;
private static final CharsetDecoder UTF16LE_DECODER =
Charset.forName("UTF-16LE").newDecoder();
private static final CharsetDecoder UTF8_DECODER =
Charset.forName("UTF-8").newDecoder();
private static final Logger LOGGER =
Logger.getLogger(StringBlock.class.getName());
private static final int CHUNK_TYPE = 0x001C0001;
private static final int UTF8_FLAG = 0x00000100;
}