org.apache.tomcat.util.buf
Class Ascii

java.lang.Object
  org.apache.tomcat.util.buf.Ascii

public final class Ascii

extends java.lang.Object

This class implements some basic ASCII character handling functions.

Author:

dac@eng.sun.com, James Todd [gonzo@eng.sun.com]

Constructor Summary

Ascii()

Method Summary

static boolean	isAlpha(int c) Returns true if the specified ASCII character is upper or lower case.
static boolean	isDigit(int c) Returns true if the specified ASCII character is a digit.
static boolean	isLower(int c) Returns true if the specified ASCII character is lower case.
static boolean	isUpper(int c) Returns true if the specified ASCII character is upper case.
static boolean	isWhite(int c) Returns true if the specified ASCII character is white space.
static int	parseInt(byte[] b, int off, int len) Parses an unsigned integer from the specified subarray of bytes.
static int	parseInt(char[] b, int off, int len)
static long	parseLong(byte[] b, int off, int len) Parses an unsigned long from the specified subarray of bytes.
static long	parseLong(char[] b, int off, int len)
static int	toLower(int c) Returns the lower case equivalent of the specified ASCII character.
static int	toUpper(int c) Returns the upper case equivalent of the specified ASCII character.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Ascii

public Ascii()

Method Detail

toUpper

public static int toUpper(int c)

Returns the upper case equivalent of the specified ASCII character.

toLower

public static int toLower(int c)

Returns the lower case equivalent of the specified ASCII character.

isAlpha

public static boolean isAlpha(int c)

Returns true if the specified ASCII character is upper or lower case.

isUpper

public static boolean isUpper(int c)

Returns true if the specified ASCII character is upper case.

isLower

public static boolean isLower(int c)

Returns true if the specified ASCII character is lower case.

isWhite

public static boolean isWhite(int c)

Returns true if the specified ASCII character is white space.

isDigit

public static boolean isDigit(int c)

Returns true if the specified ASCII character is a digit.

parseInt

public static int parseInt(byte[] b,
                           int off,
                           int len)
                    throws java.lang.NumberFormatException

Parses an unsigned integer from the specified subarray of bytes.

Parameters:

b - the bytes to parse

off - the start offset of the bytes

len - the length of the bytes

Throws:

java.lang.NumberFormatException - if the integer format was invalid

parseInt

public static int parseInt(char[] b,
                           int off,
                           int len)
                    throws java.lang.NumberFormatException

Throws:

java.lang.NumberFormatException

parseLong

public static long parseLong(byte[] b,
                             int off,
                             int len)
                      throws java.lang.NumberFormatException

Parses an unsigned long from the specified subarray of bytes.

Parameters:

b - the bytes to parse

off - the start offset of the bytes

len - the length of the bytes

Throws:

java.lang.NumberFormatException - if the long format was invalid

parseLong

public static long parseLong(char[] b,
                             int off,
                             int len)
                      throws java.lang.NumberFormatException

Throws:

java.lang.NumberFormatException