File	Doc	Category	Size	Date	Package
Ascii.java	API Doc	Apache Tomcat 6.0.14	6612	Fri Jul 20 04:20:32 BST 2007	org.apache.tomcat.util.buf

Ascii

• java.lang.Object

Fields Summary
private static final byte[]	toUpper
private static final byte[]	toLower
private static final boolean[]	isAlpha
private static final boolean[]	isUpper
private static final boolean[]	isLower
private static final boolean[]	isWhite
private static final boolean[]	isDigit

Constructors Summary

Methods Summary
public static boolean	isAlpha(int c) Returns true if the specified ASCII character is upper or lower case. return isAlpha[c & 0xff];
public static boolean	isDigit(int c) Returns true if the specified ASCII character is a digit. return isDigit[c & 0xff];
public static boolean	isLower(int c) Returns true if the specified ASCII character is lower case. return isLower[c & 0xff];
public static boolean	isUpper(int c) Returns true if the specified ASCII character is upper case. return isUpper[c & 0xff];
public static boolean	isWhite(int c) Returns true if the specified ASCII character is white space. return isWhite[c & 0xff];
public static int	parseInt(byte[] b, int off, int len) Parses an unsigned integer from the specified subarray of bytes. param b the bytes to parse param off the start offset of the bytes param len the length of the bytes exception NumberFormatException if the integer format was invalid int c; if (b == null || len <= 0 || !isDigit(c = b[off++])) { throw new NumberFormatException(); } int n = c - '0"; while (--len > 0) { if (!isDigit(c = b[off++])) { throw new NumberFormatException(); } n = n * 10 + c - '0"; } return n;
public static int	parseInt(char[] b, int off, int len) int c; if (b == null || len <= 0 || !isDigit(c = b[off++])) { throw new NumberFormatException(); } int n = c - '0"; while (--len > 0) { if (!isDigit(c = b[off++])) { throw new NumberFormatException(); } n = n * 10 + c - '0"; } return n;
public static long	parseLong(byte[] b, int off, int len) Parses an unsigned long from the specified subarray of bytes. param b the bytes to parse param off the start offset of the bytes param len the length of the bytes exception NumberFormatException if the long format was invalid int c; if (b == null || len <= 0 || !isDigit(c = b[off++])) { throw new NumberFormatException(); } long n = c - '0"; long m; while (--len > 0) { if (!isDigit(c = b[off++])) { throw new NumberFormatException(); } m = n * 10 + c - '0"; if (m < n) { // Overflow throw new NumberFormatException(); } else { n = m; } } return n;
public static long	parseLong(char[] b, int off, int len) int c; if (b == null || len <= 0 || !isDigit(c = b[off++])) { throw new NumberFormatException(); } long n = c - '0"; long m; while (--len > 0) { if (!isDigit(c = b[off++])) { throw new NumberFormatException(); } m = n * 10 + c - '0"; if (m < n) { // Overflow throw new NumberFormatException(); } else { n = m; } } return n;
public static int	toLower(int c) Returns the lower case equivalent of the specified ASCII character. return toLower[c & 0xff] & 0xff;
public static int	toUpper(int c) Returns the upper case equivalent of the specified ASCII character. /* * Initialize character translation and type tables. */ for (int i = 0; i < 256; i++) { toUpper[i] = (byte)i; toLower[i] = (byte)i; } for (int lc = 'a"; lc <= 'z"; lc++) { int uc = lc + 'A" - 'a"; toUpper[lc] = (byte)uc; toLower[uc] = (byte)lc; isAlpha[lc] = true; isAlpha[uc] = true; isLower[lc] = true; isUpper[uc] = true; } isWhite[ ' "] = true; isWhite['\t"] = true; isWhite['\r"] = true; isWhite['\n"] = true; isWhite['\f"] = true; isWhite['\b"] = true; for (int d = '0"; d <= '9"; d++) { isDigit[d] = true; } return toUpper[c & 0xff] & 0xff;