private void parseCodeBands()

in src/main/java/org/apache/commons/compress/harmony/unpack200/ClassBands.java [717:783]
62 lines of code
12 McCabe index (conditional complexity)

    private void parseCodeBands(final InputStream in) throws Pack200Exception, IOException {
        final AttributeLayout layout = attrMap.getAttributeLayout(AttributeLayout.ATTRIBUTE_CODE,
            AttributeLayout.CONTEXT_METHOD);

        final int codeCount = SegmentUtils.countMatches(methodFlags, layout);
        final int[] codeHeaders = decodeBandInt("code_headers", in, Codec.BYTE1, codeCount);

        final boolean allCodeHasFlags = segment.getSegmentHeader().getOptions().hasAllCodeFlags();
        if (!allCodeHasFlags) {
            codeHasAttributes = new boolean[codeCount];
        }
        int codeSpecialHeader = 0;
        for (int i = 0; i < codeCount; i++) {
            if (codeHeaders[i] == 0) {
                codeSpecialHeader++;
                if (!allCodeHasFlags) {
                    codeHasAttributes[i] = true;
                }
            }
        }
        final int[] codeMaxStackSpecials = decodeBandInt("code_max_stack", in, Codec.UNSIGNED5, codeSpecialHeader);
        final int[] codeMaxNALocalsSpecials = decodeBandInt("code_max_na_locals", in, Codec.UNSIGNED5,
            codeSpecialHeader);
        final int[] codeHandlerCountSpecials = decodeBandInt("code_handler_count", in, Codec.UNSIGNED5,
            codeSpecialHeader);

        codeMaxStack = new int[codeCount];
        codeMaxNALocals = new int[codeCount];
        codeHandlerCount = new int[codeCount];
        int special = 0;
        for (int i = 0; i < codeCount; i++) {
            final int header = 0xff & codeHeaders[i];
            if (header < 0) {
                throw new IllegalStateException("Shouldn't get here");
            }
            if (header == 0) {
                codeMaxStack[i] = codeMaxStackSpecials[special];
                codeMaxNALocals[i] = codeMaxNALocalsSpecials[special];
                codeHandlerCount[i] = codeHandlerCountSpecials[special];
                special++;
            } else if (header <= 144) {
                codeMaxStack[i] = (header - 1) % 12;
                codeMaxNALocals[i] = (header - 1) / 12;
                codeHandlerCount[i] = 0;
            } else if (header <= 208) {
                codeMaxStack[i] = (header - 145) % 8;
                codeMaxNALocals[i] = (header - 145) / 8;
                codeHandlerCount[i] = 1;
            } else if (header <= 255) {
                codeMaxStack[i] = (header - 209) % 7;
                codeMaxNALocals[i] = (header - 209) / 7;
                codeHandlerCount[i] = 2;
            } else {
                throw new IllegalStateException("Shouldn't get here either");
            }
        }
        codeHandlerStartP = decodeBandInt("code_handler_start_P", in, Codec.BCI5, codeHandlerCount);
        codeHandlerEndPO = decodeBandInt("code_handler_end_PO", in, Codec.BRANCH5, codeHandlerCount);
        codeHandlerCatchPO = decodeBandInt("code_handler_catch_PO", in, Codec.BRANCH5, codeHandlerCount);
        codeHandlerClassRCN = decodeBandInt("code_handler_class_RCN", in, Codec.UNSIGNED5, codeHandlerCount);

        final int codeFlagsCount = allCodeHasFlags ? codeCount : codeSpecialHeader;

        codeAttributes = new List[codeFlagsCount];
        Arrays.setAll(codeAttributes, i -> new ArrayList<>());
        parseCodeAttrBands(in, codeFlagsCount);
    }