118 lines
3.1 KiB
Java
118 lines
3.1 KiB
Java
/*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/.
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the License.
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*
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* The Original Code is the Netscape Messaging Access SDK Version 3.5 code,
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* released on or about June 15, 1998.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998 Netscape
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* Communications Corporation. All Rights Reserved.
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*
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* Contributor(s): ______________________________________.
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*/
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/*
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* Copyright (c) 1997 and 1998 Netscape Communications Corporation
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* (http://home.netscape.com/misc/trademarks.html)
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*/
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package netscape.messaging;
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/**
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*Helper class for doing C-runtime equivalent operations.
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*@author derekt@netscape.com
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*@version 1.0
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*/
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public class Common
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{
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/**
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*Converts a byte array of specified length into an int.
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*/
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public final int atoi( byte[] in_string )
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{
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int i;
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int n;
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int sign;
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///////////////////////////////////////////////////////////////////////
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// Move past any leading spaces.
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///////////////////////////////////////////////////////////////////////
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for ( i = 0; Character.isSpaceChar((char)in_string[i]) &&
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i < in_string.length; i++ )
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{
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}
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sign = (in_string[i] == '-') ? -1 : 1;
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///////////////////////////////////////////////////////////////////////
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// Store the sign of the number.
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///////////////////////////////////////////////////////////////////////
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if ( in_string[i] == '+' || in_string[i] == '-' )
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{
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i++;
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}
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for ( n = 0; Character.isDigit((char)in_string[i]) &&
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i < in_string.length; i++ )
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{
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n = 10 * n + ( in_string[i] - '0');
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}
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return sign * n;
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}
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/**
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*Converts an integer into its ASCII representation.
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*/
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public final int itoa( int in_number, byte[] io_string )
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{
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int i;
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int sign;
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if ((sign = in_number) < 0)
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{
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in_number = -in_number;
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}
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i = 0;
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do
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{
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io_string[i++] = (byte)(in_number % 10 + '0');
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}
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while ((in_number /= 10) > 0);
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if ( sign < 0 )
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{
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io_string[i++] = '-';
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}
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reverse(io_string, i );
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return i;
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}
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/**
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*Helper used by itoa.
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*/
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protected final void reverse( byte[] io_string, int in_length )
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{
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int c, i, j;
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for ( i = 0, j = in_length - 1; i < j; i++, j-- )
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{
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c = io_string[i];
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io_string[i] = io_string[j];
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io_string[j] = (byte)c;
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}
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}
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}
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