Upstream/Minestom
1
0
Fork 0
mirror of https://github.com/Minestom/Minestom.git synced 2024-09-28 14:37:31 +02:00
Code Issues Projects Releases Wiki Activity

Steal var-int/long code from async-profiler

Browse Source
This commit is contained in:
TheMode 2021-08-10 18:45:02 +02:00
parent 36f3355a12
commit 7f4e4a9b80
1 changed files with 16 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
src/main/java/net/minestom/server/utils/Utils.java
View File

@ -58,34 +58,28 @@ public final class Utils {
}
public static int readVarInt(ByteBuffer buf) {
int i = 0;
final int maxRead = Math.min(5, buf.remaining());
for (int j = 0; j < maxRead; j++) {
final int k = buf.get();
i |= (k & 0x7F) << j * 7;
if ((k & 0x80) != 128) {
return i;
// https://github.com/jvm-profiling-tools/async-profiler/blob/a38a375dc62b31a8109f3af97366a307abb0fe6f/src/converter/one/jfr/JfrReader.java#L393
int result = 0;
for (int shift = 0; ; shift += 7) {
byte b = buf.get();
result |= (b & 0x7f) << shift;
if (b >= 0) {
return result;
}
}
throw new RuntimeException("VarInt is too big");
}
public static long readVarLong(@NotNull ByteBuffer buffer) {
int numRead = 0;
public static long readVarLong(@NotNull ByteBuffer buf) {
// https://github.com/jvm-profiling-tools/async-profiler/blob/a38a375dc62b31a8109f3af97366a307abb0fe6f/src/converter/one/jfr/JfrReader.java#L404
long result = 0;
byte read;
do {
read = buffer.get();
long value = (read & 0b01111111);
result |= (value << (7 * numRead));
numRead++;
if (numRead > 10) {
throw new RuntimeException("VarLong is too big");
for (int shift = 0; shift < 56; shift += 7) {
byte b = buf.get();
result |= (b & 0x7fL) << shift;
if (b >= 0) {
return result;
}
} while ((read & 0b10000000) != 0);
return result;
}
return result | (buf.get() & 0xffL) << 56;
}
public static void writeVarLong(ByteBuffer buffer, long value) {