encode3to4LittleEndian() — netty Function Reference

Architecture documentation for the encode3to4LittleEndian() function in Base64.java from the netty codebase.

Function java CodecBase Serialization called by 1

Entity Profile

CodecBase→ Serialization→ encode3to4LittleEndian() — netty Function Reference

Dependency Diagram

graph TD
  ab863a79_b507_5845_6e6a_0ab6914875a1["encode3to4LittleEndian()"]
  185f00a4_bc52_6a3f_9287_a20b3809bf29["Base64"]
  ab863a79_b507_5845_6e6a_0ab6914875a1 -->|defined in| 185f00a4_bc52_6a3f_9287_a20b3809bf29
  7551fd15_5173_2a99_6a2e_fbfda3e91ed1["encode3to4()"]
  7551fd15_5173_2a99_6a2e_fbfda3e91ed1 -->|calls| ab863a79_b507_5845_6e6a_0ab6914875a1
  style ab863a79_b507_5845_6e6a_0ab6914875a1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-base/src/main/java/io/netty/handler/codec/base64/Base64.java lines 296–335

    private static int encode3to4LittleEndian(
            int inBuff, int numSigBytes, ByteBuf dest, int destOffset, byte[] alphabet, boolean addPadding) {
        // Packing bytes into an int to reduce bound and reference count checking.
        switch (numSigBytes) {
            case 3:
                dest.setInt(destOffset, alphabet[inBuff >>> 18       ]       |
                                        alphabet[inBuff >>> 12 & 0x3f] << 8  |
                                        alphabet[inBuff >>>  6 & 0x3f] << 16 |
                                        alphabet[inBuff        & 0x3f] << 24);
                return 4;
            case 2:
                if (addPadding) {
                    dest.setInt(destOffset, alphabet[inBuff >>> 18        ]       |
                                            alphabet[inBuff >>> 12 & 0x3f ] << 8  |
                                            alphabet[inBuff >>>  6 & 0x3f ] << 16 |
                                            EQUALS_SIGN                     << 24);
                    return 4;
                } else {
                    dest.setMedium(destOffset, alphabet[inBuff >>> 18       ]      |
                                               alphabet[inBuff >>> 12 & 0x3f] << 8 |
                                               alphabet[inBuff >>>  6 & 0x3f] << 16);
                    return 3;
                }
            case 1:
                if (addPadding) {
                    dest.setInt(destOffset, alphabet[inBuff >>> 18       ]       |
                                            alphabet[inBuff >>> 12 & 0x3f] << 8  |
                                            EQUALS_SIGN                    << 16 |
                                            EQUALS_SIGN                    << 24);
                    return 4;
                } else {
                    dest.setShort(destOffset, alphabet[inBuff >>> 18       ]     |
                                              alphabet[inBuff >>> 12 & 0x3f] << 8);
                    return 2;
                }
            default:
                // NOOP
                return 0;
        }
    }