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Streamline utf-8 conversion.

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This commit is contained in:
James Roseborough
2008-07-09 21:09:27 +00:00
parent fec0f2955f
commit c4a4e7f2cf
1 changed files with 15 additions and 21 deletions
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36
src/core/org/luaj/vm/LString.java
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@@ -102,27 +102,21 @@ public class LString extends LValue {
* Convert to Java string using UTF-8 encoding
*/
public String toJavaString() {
char[] c = new char[m_length];
int n=0, p=0;
int b;
for ( int i=0; i<m_length; i++ ) {
switch ( (b = m_bytes[m_offset+i]) & 0xe0 ) {
default:
if ( b == 0 )
return new String( c, 0, n );
c[p=n++] = (char) (0xff & b);
break;
case 0x80:
case 0xa0:
c[p] = (char) ((c[p] << 6) | ( b & 0x3f ));
break;
case 0xc0:
c[p=n++] = (char) (b & 0x1f);
break;
case 0xe0:
c[p=n++] = (char) (b & 0xf);
break;
}
char[] c=new char[m_length];
int i, b, n=0;
for ( i=0; i<m_length; ) {
if ((b = m_bytes[m_offset+(i++)]) == 0)
return new String(c,0,n);
c[n++] = (char) (
(b>=0||i>=m_length)?
b:
(b<-32||i+1>=m_length)?
(((b&0x3f) << 6)
| (m_bytes[m_offset+(i++)]&0x3f)):
(((b&0xf) << 12)
| ((m_bytes[m_offset+(i++)]&0x3f)<<6)
| (m_bytes[m_offset+(i++)]&0x3f))
);
}
return new String( c, 0, n );
}