woggioni/jzstd
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improved performances of net.woggioni.jzstd.ZstdInputStream

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This commit is contained in:
Walter Oggioni
2020-05-01 01:13:11 +01:00
parent 3c21a78e1a
commit 4c38df39c9
1 changed files with 7 additions and 4 deletions
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11
src/main/java/net/woggioni/jzstd/ZstdInputStream.java
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@@ -15,6 +15,7 @@ public class ZstdInputStream extends InputStream {
private final ZSTD_inBuffer input;
private final ZSTD_outBuffer output;
private final byte[] buffer;
private enum State {
AVAILABLE_INPUT, SOURCE_DEPLETED, CTX_FLUSHED
@@ -33,6 +34,7 @@ public class ZstdInputStream extends InputStream {
this.ctx_owner = ctx_owner;
this.input = new ZSTD_inBuffer(inputBufferSize);
this.output = new ZSTD_outBuffer(outputBufferSize);
this.buffer = new byte[inputBufferSize];
}
public static ZstdInputStream from(InputStream source) {
@@ -55,13 +57,14 @@ public class ZstdInputStream extends InputStream {
} else if(input.src.position() == input.src.capacity()) {
input.src.position(0);
}
while (input.src.position() < input.src.capacity()) {
int b = source.read();
if (b < 0) {
int toRead = input.src.capacity() - input.src.position();
if(toRead > 0) {
int read = source.read(buffer, 0, toRead);
if(read < 0) {
state = State.SOURCE_DEPLETED;
break;
}
input.src.put((byte) b);
input.src.put(buffer, 0, toRead);
}
input.pos = zero;
input.size = new size_t(input.src.position());