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8184947: ZipCoder performance improvements

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Reviewed-by: martin, redestad
This commit is contained in:
Xueming Shen 2017-12-13 07:51:57 -08:00
parent 1ae8f54835
commit 4f0ea9242f
9 changed files with 620 additions and 881 deletions
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59
src/java.base/share/classes/sun/nio/cs/US_ASCII.java
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@ -58,8 +58,7 @@ public class US_ASCII
return new Encoder(this);
}
private static class Decoder extends CharsetDecoder
implements ArrayDecoder {
private static class Decoder extends CharsetDecoder {
private Decoder(Charset cs) {
super(cs, 1.0f, 1.0f);
@ -128,32 +127,9 @@ public class US_ASCII
else
return decodeBufferLoop(src, dst);
}
private char repl = '\uFFFD';
protected void implReplaceWith(String newReplacement) {
repl = newReplacement.charAt(0);
}
public int decode(byte[] src, int sp, int len, char[] dst) {
int dp = 0;
len = Math.min(len, dst.length);
while (dp < len) {
byte b = src[sp++];
if (b >= 0)
dst[dp++] = (char)b;
else
dst[dp++] = repl;
}
return dp;
}
public boolean isASCIICompatible() {
return true;
}
}
private static class Encoder extends CharsetEncoder
implements ArrayEncoder {
private static class Encoder extends CharsetEncoder {
private Encoder(Charset cs) {
super(cs, 1.0f, 1.0f);
@ -237,36 +213,5 @@ public class US_ASCII
return encodeBufferLoop(src, dst);
}
private byte repl = (byte)'?';
protected void implReplaceWith(byte[] newReplacement) {
repl = newReplacement[0];
}
public int encode(char[] src, int sp, int len, byte[] dst) {
int dp = 0;
int sl = sp + Math.min(len, dst.length);
while (sp < sl) {
char c = src[sp++];
if (c < 0x80) {
dst[dp++] = (byte)c;
continue;
}
if (Character.isHighSurrogate(c) && sp < sl &&
Character.isLowSurrogate(src[sp])) {
if (len > dst.length) {
sl++;
len--;
}
sp++;
}
dst[dp++] = repl;
}
return dp;
}
public boolean isASCIICompatible() {
return true;
}
}
}