System.arraycopy(data, offset + SIGNATURE_OFFSET, sig, 0, SIGNATURE_LENGTH);

        int index = offset + SIGNATURE_OFFSET;
        for ( int i = 0; i < SIGNATURE_LENGTH; i++ )
            data[ index + i ] = 0;

        this.digest.update(data, offset, length);

        byte[] cmp = new byte[SIGNATURE_LENGTH];
        System.arraycopy(this.digest.doFinal(), 0, cmp, 0, SIGNATURE_LENGTH);

            return new OrSpec<T>(specs);
        }
        Spec<? super T>[] combinedSpecs = uncheckedCast(ObjectArrays.newArray(Spec.class, thisLength + specs.length));
        System.arraycopy(thisSpecs, 0, combinedSpecs, 0, thisLength);
        System.arraycopy(specs, 0, combinedSpecs, thisLength, specs.length);
        return new OrSpec<T>(combinedSpecs);
    }

    public static <T> OrSpec<T> empty() {
        return uncheckedCast(EMPTY);

            combinedArgs[3] = new File("gradlew").getAbsolutePath();
            System.arraycopy(args, 0, combinedArgs, 4, args.length);
        } else {
            combinedArgs = new String[1 + args.length];
            File gradlew = new File("gradlew");
            combinedArgs[0] = gradlew.getAbsolutePath();
            System.arraycopy(args, 0, combinedArgs, 1, args.length);
        }

        try {

        String[] buildFileNames = getValidBuildFileNames();

        GRADLE_BUILD_FILES = new String[settingsFileNames.length + buildFileNames.length];
        System.arraycopy(settingsFileNames, 0, GRADLE_BUILD_FILES, 0, settingsFileNames.length);
        System.arraycopy(buildFileNames, 0, GRADLE_BUILD_FILES, settingsFileNames.length, buildFileNames.length);
    }

    public static boolean isValidBuildSrcBuild(File buildSrcDir) {

            ci += 5;
            c[ci++] = ':';
            do {
                if( si == length ) {
                    int n = 16 - s;
                    System.arraycopy( SPACE_CHARS, 0, c, ci, n * 3 );
                    ci += n * 3;
                    System.arraycopy( SPACE_CHARS, 0, d, s, n );
                    break;
                }
                c[ci++] = ' ';
                i = src[srcIndex + si] & 0xFF;

        int start = dstIndex;

        if (blob != null) {
            System.arraycopy(blob, 0, dst, dstIndex, blob.length );
            dstIndex += blob.length;
        } else {
            System.arraycopy( lmHash, 0, dst, dstIndex, lmHash.length );
            dstIndex += lmHash.length;
            System.arraycopy( ntHash, 0, dst, dstIndex, ntHash.length );
            dstIndex += ntHash.length;
    

  public static <T extends @Nullable Object> T[] concat(
      T[] first, T[] second, Class<@NonNull T> type) {
    T[] result = newArray(type, first.length + second.length);
    System.arraycopy(first, 0, result, 0, first.length);
    System.arraycopy(second, 0, result, first.length, second.length);
    return result;
  }

  /**
   * Returns a new array that prepends {@code element} to {@code array}.
   *

        // all fixed inputs go into the suffix:
        // + label
        System.arraycopy(label, 0, suffix, 0, label.length);
        // + 1 byte 0x00
        // + context
        System.arraycopy(context, 0, suffix, label.length + 1, context.length);
        // + 4 byte (== r bits) big endian encoding of L
        suffix[ suffix.length - 1 ] = (byte) 128;

        bufferIndex += 8;
        bufferIndex += 8;

        int nameLen = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;
        byte[] nameBytes = new byte[nameLen];
        System.arraycopy(buffer, bufferIndex, nameBytes, 0, nameBytes.length);
        bufferIndex += nameLen;
        this.fileName = new String(nameBytes, StandardCharsets.UTF_16LE);
        return bufferIndex - start;
    }


    /**

                SMBUtil.writeInt2(hashAlgo, dst, dstIndex);
                dstIndex += 2;
            }
        }

        if ( this.salt != null ) {
            System.arraycopy(this.salt, 0, dst, dstIndex, this.salt.length);
            dstIndex += this.salt.length;
        }

        return dstIndex - start;
    }


    /**
     * {@inheritDoc}
     *