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UnicodeToBytes.java (write(String,int,int,char[])): New overloading, allows greater efficiency.

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�
	* gnu/gcj/convert/UnicodeToBytes.java (write(String,int,int,char[])):
	New overloading, allows greater efficiency.
	* gnu/gcj/convert/Output_8859_1.java (write(String,int,int,char[])):
	New overloading (for efficiency - avoids copying).
	* gnu/gcj/convert/Output_UTF8.java:  Fix typo: 0xC0 -> 0c3F.
	* gnu/gcj/convert/Input_UTF8.java:  Fix typos in bit masks.

From-SVN: r26494
This commit is contained in:
Per Bothner 1999-04-16 10:22:02 -07:00
parent c80eb46728
commit 2012fd2db0
3 changed files with 51 additions and 4 deletions
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10
libjava/gnu/gcj/convert/Input_UTF8.java
View File

@ -8,6 +8,12 @@ details. */
package gnu.gcj.convert;
/**
* Convert UTF8 to Unicode.
* @author Per Bothner <bothner@cygnus.com>
* @date Match 1999.
*/
public class Input_UTF8 extends BytesToUnicode
{
public String getName() { return "UTF8"; }
@ -84,12 +90,12 @@ public class Input_UTF8 extends BytesToUnicode
}
else // prefix byte
{
if ((b & 0xE) == 0xC0)
if ((b & 0xE0) == 0xC0)
{
partial = b & 0x1F;
partial_bytes_expected = 1;
}
else if ((b & 0xF) == 0xF0)
else if ((b & 0xF0) == 0xE0)
{
partial = b & 0xF;
partial_bytes_expected = 2;

22
libjava/gnu/gcj/convert/Output_8859_1.java
View File

@ -8,6 +8,13 @@ details. */
package gnu.gcj.convert;
/**
* Convert Unicode ISO-Latin-1 (8851-1) text.
* The high-order byte of each character is truncated.
* @author Per Bothner <bothner@cygnus.com>
* @date Match 1999.
*/
public class Output_8859_1 extends UnicodeToBytes
{
public String getName() { return "8859_1"; }
@ -28,4 +35,19 @@ public class Output_8859_1 extends UnicodeToBytes
this.count = count;
return inlength;
}
public int write (String str, int inpos, int inlength, char[] work)
{
int count = this.count;
byte[] buf = this.buf;
int avail = buf.length - count;
if (inlength > avail)
inlength = avail;
for (int i = inlength; --i >= 0; )
{
buf[count++] = (byte) str.charAt(inpos++);
}
this.count = count;
return inlength;
}
}

23
libjava/gnu/gcj/convert/UnicodeToBytes.java
View File

@ -80,11 +80,30 @@ public abstract class UnicodeToBytes
/** Convert chars to bytes.
* Converted bytes are written to buf, starting at count.
* @param inbuffer sources of characters to convert
* @param inpos index of initial character ininbuffer to convert
* @param inbuffer source of characters to convert
* @param inpos index of initial character in inbuffer to convert
* @param inlength number of characters to convert
* @return number of chars converted
* Also, this.count is increment by the number of bytes converted.
*/
public abstract int write (char[] inbuffer, int inpos, int inlength);
/** Convert chars to bytes.
* Converted bytes are written to buf, starting at count.
* @param str source of characters to convert
* @param inpos index of initial character in str to convert
* @param inlength number of characters to convert
* @param work if non-null, a buffer than can be used
* @return number of chars converted
* Also, this.count is increment by the number of bytes converted.
*/
public int write (String str, int inpos, int inlength, char[] work)
{
if (work == null)
work = new char[inlength];
int srcEnd = inpos + (inlength > work.length ? work.length : inlength);
str.getChars(inpos, srcEnd, work, 0);
return write(work, inpos, inlength);
}
}