/*
* Transform the hexadecimal long output into the equivalent
* hexadecimal double value.
*/
static String hexLongStringtoHexDoubleString(String transString) {
transString = transString.toLowerCase();
String zeros = "";
StringBuffer result = new StringBuffer(24);
for (int i = 0; i < (16 - transString.length()); i++, zeros += "0") ;
transString = zeros + transString;
// assert transString.length == 16;
char topChar;
// Extract sign
if ((topChar = transString.charAt(0)) >= '8') { // 8, 9, a, A, b, B, ...
result.append("-");
// clear sign bit
transString =
Character.toString(Character.forDigit(Character.digit(topChar, 16) - 8, 16))
+ transString.substring(1, 16);
}
// check for NaN and infinity
String signifString = transString.substring(3, 16);
if (transString.substring(0, 3).equals("7ff")) {
if (signifString.equals("0000000000000")) {
result.append("Infinity");
} else result.append("NaN");
} else { // finite value
// Extract exponent
int exponent = Integer.parseInt(transString.substring(0, 3), 16) - DoubleConsts.EXP_BIAS;
result.append("0x");
if (exponent == DoubleConsts.MIN_EXPONENT - 1) { // zero or subnormal
if (signifString.equals("0000000000000")) {
result.append("0.0p0");
} else {
result.append(
"0." + signifString.replaceFirst("0+$", "").replaceFirst("^$", "0") + "p-1022");
}
} else { // normal value
result.append(
"1." + signifString.replaceFirst("0+$", "").replaceFirst("^$", "0") + "p" + exponent);
}
}
return result.toString();
}
