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Increases compression rate of unicode character class table.

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This commit is contained in:
konsoletyper 2014-03-03 10:03:26 +04:00
parent 0e93eec575
commit acb43e9ad0
1 changed files with 26 additions and 5 deletions
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31
teavm-classlib/src/main/java/org/teavm/classlib/impl/unicode/UnicodeHelper.java
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@ -62,7 +62,7 @@ public class UnicodeHelper {
public static char encodeByte(byte b) {
if (b < '\"' - ' ') {
return (char)(b + ' ');
} else if (b < '\\' - ' ') {
} else if (b < '\\' - ' ' - 1) {
return (char)(b + ' ' + 1);
} else {
return (char)(b + ' ' + 2);
@ -85,11 +85,20 @@ public class UnicodeHelper {
byte b = bytes[i];
if (i < bytes.length - 1 && b == bytes[i + 1]) {
int count = 0;
while (bytes[i++] == b && count < 80) {
while (i < bytes.length && bytes[i++] == b) {
++count;
}
sb.append(UnicodeHelper.encodeByte((byte)(b + 32)));
sb.append(UnicodeHelper.encodeByte((byte)count));
if (count < 80) {
sb.append(UnicodeHelper.encodeByte((byte)(b + 32)));
sb.append(UnicodeHelper.encodeByte((byte)count));
} else {
sb.append(UnicodeHelper.encodeByte((byte)64));
sb.append(UnicodeHelper.encodeByte(b));
for (int j = 0; j < 3; ++j) {
sb.append(UnicodeHelper.encodeByte((byte)(count & 0x3F)));
count /= 0x40;
}
}
--i;
} else {
sb.append(UnicodeHelper.encodeByte(bytes[i]));
@ -103,7 +112,19 @@ public class UnicodeHelper {
int index = 0;
for (int i = 0; i < encoded.length(); ++i) {
byte b = decodeByte(encoded.charAt(i));
if (b > 32) {
if (b == 64) {
b = decodeByte(encoded.charAt(++i));
int count = 0;
int pos = 1;
for (int j = 0; j < 3; ++j) {
byte digit = decodeByte(encoded.charAt(++i));
count |= pos * digit;
pos *= 0x40;
}
while (count-- > 0) {
data[index++] = b;
}
} else if (b > 32) {
b -= 32;
byte count = decodeByte(encoded.charAt(++i));
while (count-- > 0) {