/**
* read encoding len. see Stringpool.cpp ENCODE_LENGTH
*
* @param in
* @return
* @throws IOException
*/
private static int readLen16(TellableInputStream in) throws IOException {
int len = 0;
int i = in.readUShort();
if ((i & 0x8000) != 0) {
len |= (i & 0x7fff) << 15;
len += in.readUShort();
} else {
len = i;
}
return len;
}
/**
* read res value, convert from different types to string.
*
* @param in
* @param stringPool
* @return
* @throws IOException
*/
public static ResValue readResValue(
TellableInputStream in,
StringPool stringPool,
ResourceTable resourceTable,
boolean isStyle,
Locale locale)
throws IOException {
ResValue resValue = new ResValue();
resValue.size = in.readUShort();
resValue.res0 = in.readUByte();
resValue.dataType = in.readUByte();
switch (resValue.dataType) {
case ResValue.ResType.INT_DEC:
case ResValue.ResType.INT_HEX:
resValue.data = String.valueOf(in.readInt());
break;
case ResValue.ResType.STRING:
int strRef = in.readInt();
if (strRef > 0) {
resValue.data = stringPool.get(strRef);
}
break;
case ResValue.ResType.REFERENCE:
long resourceId = in.readUInt();
resValue.data = getResourceByid(resourceId, isStyle, resourceTable, locale);
break;
case ResValue.ResType.INT_BOOLEAN:
resValue.data = String.valueOf(in.readInt() != 0);
break;
case ResValue.ResType.NULL:
resValue.data = "";
break;
case ResValue.ResType.INT_COLOR_RGB8:
case ResValue.ResType.INT_COLOR_RGB4:
resValue.data = readRGBs(in, 6);
break;
case ResValue.ResType.INT_COLOR_ARGB8:
case ResValue.ResType.INT_COLOR_ARGB4:
resValue.data = readRGBs(in, 8);
break;
case ResValue.ResType.DIMENSION:
resValue.data = getDemension(in);
break;
case ResValue.ResType.FRACTION:
resValue.data = getFraction(in);
break;
default:
resValue.data = "{" + resValue.dataType + ":" + in.readUInt() + "}";
}
return resValue;
}
/** read string from input stream. if get EOF before read enough data, throw IOException. */
public static String readString(TellableInputStream in, StringEncoding encoding)
throws IOException {
if (encoding == StringEncoding.UTF8) {
// The lengths are encoded in the same way as for the 16-bit format
// but using 8-bit rather than 16-bit integers.
int strLen = readLen(in);
int bytesLen = readLen(in);
byte[] bytes = in.readBytes(bytesLen);
String str = new String(bytes, "UTF-8");
// zero
int trailling = in.readUByte();
return str;
} else {
// The length is encoded as either one or two 16-bit integers as per the commentRef...
int strLen = readLen16(in);
String str = in.readStringUTF16(strLen);
// zero
int trailling = in.readUShort();
return str;
}
}