Mega Code Archive
Append hex digit
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//
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
/**
* Fast String Utilities.
*
* These string utilities provide both conveniance methods and performance
* improvements over most standard library versions. The main aim of the
* optimizations is to avoid object creation unless absolutely required.
*
* @author Greg Wilkins (gregw)
*/
public class Utils {
/**
* append hex digit
*
*/
public static void append(StringBuffer buf, byte b, int base) {
int bi = 0xff & b;
int c = '0' + (bi / base) % base;
if (c > '9')
c = 'a' + (c - '0' - 10);
buf.append((char) c);
c = '0' + bi % base;
if (c > '9')
c = 'a' + (c - '0' - 10);
buf.append((char) c);
}
/* ------------------------------------------------------------ */
public static void append2digits(StringBuffer buf, int i) {
if (i < 100) {
buf.append((char) (i / 10 + '0'));
buf.append((char) (i % 10 + '0'));
}
}
}
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