private void defineEncodingConstants(
Ruby runtime, RubyEncoding encoding, byte[] name, int p, int end) {
Encoding enc = ASCIIEncoding.INSTANCE;
int s = p;
int code = name[s] & 0xff;
if (enc.isDigit(code)) return;
boolean hasUpper = false;
boolean hasLower = false;
if (enc.isUpper(code)) {
hasUpper = true;
while (++s < end && (enc.isAlnum(name[s] & 0xff) || name[s] == (byte) '_')) {
if (enc.isLower(name[s] & 0xff)) hasLower = true;
}
}
boolean isValid = false;
if (s >= end) {
isValid = true;
defineEncodingConstant(runtime, encoding, name, p, end);
}
if (!isValid || hasLower) {
if (!hasLower || !hasUpper) {
do {
code = name[s] & 0xff;
if (enc.isLower(code)) hasLower = true;
if (enc.isUpper(code)) hasUpper = true;
} while (++s < end && (!hasLower || !hasUpper));
}
byte[] constName = new byte[end - p];
System.arraycopy(name, p, constName, 0, end - p);
s = 0;
code = constName[s] & 0xff;
if (!isValid) {
if (enc.isLower(code)) constName[s] = AsciiTables.ToUpperCaseTable[code];
for (; s < constName.length; ++s) {
if (!enc.isAlnum(constName[s] & 0xff)) constName[s] = (byte) '_';
}
if (hasUpper) {
defineEncodingConstant(runtime, encoding, constName, 0, constName.length);
}
}
if (hasLower) {
for (s = 0; s < constName.length; ++s) {
code = constName[s] & 0xff;
if (enc.isLower(code)) constName[s] = AsciiTables.ToUpperCaseTable[code];
}
defineEncodingConstant(runtime, encoding, constName, 0, constName.length);
}
}
}
