File	Doc	Category	Size	Date	Package
Base32.java	API Doc	Azureus 3.0.3.4	4467	Thu Feb 09 19:42:44 GMT 2006	org.gudy.azureus2.core3.util

Base32

• java.lang.Object

Fields Summary
private static final String	base32Chars
private static final int[]	base32Lookup

Constructors Summary

Methods Summary
public static byte[]	decode(java.lang.String base32) int i, index, lookup, offset, digit; byte[] bytes = new byte[base32.length()*5/8]; for(i = 0, index = 0, offset = 0; i < base32.length(); i++) { lookup = base32.charAt(i) - '0"; /* Skip chars outside the lookup table */ if ( lookup < 0 || lookup >= base32Lookup.length) continue; digit = base32Lookup[lookup]; /* If this digit is not in the table, ignore it */ if (digit == 0xFF) continue; if (index <= 3) { index = (index + 5) % 8; if (index == 0) { bytes[offset] |= digit; offset++; if(offset>=bytes.length) break; } else bytes[offset] |= digit << (8 - index); } else { index = (index + 5) % 8; bytes[offset] |= (digit >>> index); offset++; if(offset>=bytes.length) break; bytes[offset] |= digit << (8 - index); } } return bytes;
public static java.lang.String	encode(byte[] bytes) int i =0, index = 0, digit = 0; int currByte, nextByte; StringBuffer base32 = new StringBuffer((bytes.length+7)*8/5); while(i < bytes.length) { currByte = (bytes[i]>=0) ? bytes[i] : (bytes[i]+256); // unsign /* Is the current digit going to span a byte boundary? */ if (index > 3) { if ((i+1)<bytes.length) nextByte = (bytes[i+1]>=0) ? bytes[i+1] : (bytes[i+1]+256); else nextByte = 0; digit = currByte & (0xFF >> index); index = (index + 5) % 8; digit <<= index; digit |= nextByte >> (8 - index); i++; } else { digit = (currByte >> (8 - (index + 5))) & 0x1F; index = (index + 5) % 8; if (index == 0) i++; } base32.append(base32Chars.charAt(digit)); } return base32.toString();