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Cleaner way of doing byte[] to upper case and converting path delimiter

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This commit is contained in:
Collin Smith 2020-09-25 00:17:14 -07:00
parent 874bb809f8
commit e2c00d7336
1 changed files with 16 additions and 1 deletions
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17
core/src/com/riiablo/mpq_bytebuf/util/Decryptor.java
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@ -271,6 +271,19 @@ public final class Decryptor {
}
public static final class LookupTable {
static final byte[] byteMap = new byte[1 << Byte.SIZE];
static {
for (int i = 0; i < byteMap.length; i++) {
byteMap[i] = (byte) i;
}
for (int i = 'a'; i <= 'z'; i++) {
byteMap[i] &= 0xDf; // 'a' -> 'A'
}
byteMap['/'] = '\\';
}
final int[] table;
LookupTable(int table) {
@ -282,13 +295,15 @@ public final class Decryptor {
}
public int hash(String str) {
return hash(str.toUpperCase().getBytes(StandardCharsets.UTF_8));
return hash(str.getBytes(StandardCharsets.US_ASCII));
}
public int hash(byte[] bytes) {
final byte[] byteMap = LookupTable.byteMap;
int seed1 = SEED1;
int seed2 = SEED2;
for (int ch : bytes) {
ch = byteMap[ch];
seed1 = get(ch) ^ (seed1 + seed2);
seed2 = ch + seed1 + seed2 + (seed2 << 5) + 3;
}