diff --git a/platform/util/src/com/intellij/util/Base64Converter.java b/platform/util/src/com/intellij/util/Base64Converter.java new file mode 100644 index 000000000000..f25f6a59e6be --- /dev/null +++ b/platform/util/src/com/intellij/util/Base64Converter.java @@ -0,0 +1,88 @@ +package com.intellij.util; + +/** + * Created by IntelliJ IDEA. + * User: maxim + * Date: 18.07.2006 + * Time: 21:16:57 + * To change this template use File | Settings | File Templates. + */ +public class Base64Converter { + public static final char [ ] alphabet = { + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', // 0 to 7 + 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', // 8 to 15 + 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', // 16 to 23 + 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', // 24 to 31 + 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', // 32 to 39 + 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', // 40 to 47 + 'w', 'x', 'y', 'z', '0', '1', '2', '3', // 48 to 55 + '4', '5', '6', '7', '8', '9', '+', '/'}; // 56 to 63 + + ////////////////////////////////////////////////////////////////////// + ////////////////////////////////////////////////////////////////////// + + public static String encode(String s) + ////////////////////////////////////////////////////////////////////// + { + return encode(s.getBytes()); + } + + public static String encode(byte [ ] octetString) + ////////////////////////////////////////////////////////////////////// + { + int bits24; + int bits6; + + char [ ] out + = new char [ ((octetString.length - 1) / 3 + 1) * 4 ]; + + int outIndex = 0; + int i = 0; + + while ((i + 3) <= octetString.length) { + // store the octets + bits24 = (octetString[i++] & 0xFF) << 16; + bits24 |= (octetString[i++] & 0xFF) << 8; + bits24 |= (octetString[i++] & 0xFF) << 0; + + bits6 = (bits24 & 0x00FC0000) >> 18; + out[outIndex++] = alphabet[bits6]; + bits6 = (bits24 & 0x0003F000) >> 12; + out[outIndex++] = alphabet[bits6]; + bits6 = (bits24 & 0x00000FC0) >> 6; + out[outIndex++] = alphabet[bits6]; + bits6 = (bits24 & 0x0000003F); + out[outIndex++] = alphabet[bits6]; + } + + if (octetString.length - i == 2) { + // store the octets + bits24 = (octetString[i] & 0xFF) << 16; + bits24 |= (octetString[i + 1] & 0xFF) << 8; + + bits6 = (bits24 & 0x00FC0000) >> 18; + out[outIndex++] = alphabet[bits6]; + bits6 = (bits24 & 0x0003F000) >> 12; + out[outIndex++] = alphabet[bits6]; + bits6 = (bits24 & 0x00000FC0) >> 6; + out[outIndex++] = alphabet[bits6]; + + // padding + out[outIndex++] = '='; + } else if (octetString.length - i == 1) { + // store the octets + bits24 = (octetString[i] & 0xFF) << 16; + + bits6 = (bits24 & 0x00FC0000) >> 18; + out[outIndex++] = alphabet[bits6]; + bits6 = (bits24 & 0x0003F000) >> 12; + out[outIndex++] = alphabet[bits6]; + + // padding + out[outIndex++] = '='; + out[outIndex++] = '='; + } + + return new String(out); + } +}