public static List parseInstructions()

in core/src/main/java/org/adoptopenjdk/jitwatch/loader/BytecodeLoader.java [741:854]
96 lines of code
22 McCabe index (conditional complexity)

	public static List<BytecodeInstruction> parseInstructions(final String bytecode)
	{
		List<BytecodeInstruction> bytecodeInstructions = new ArrayList<>();

		if (DEBUG_LOGGING_BYTECODE)
		{
			logger.debug("Raw bytecode: '{}'", bytecode);
		}

		String[] lines = bytecode.split(S_NEWLINE);

		boolean inSwitch = false;
		BCParamSwitch table = new BCParamSwitch();
		BytecodeInstruction instruction = null;

		for (String line : lines)
		{
			line = line.trim();

			if (DEBUG_LOGGING_BYTECODE)
			{
				logger.debug("parsing bytecode line: '{}' inSwitch: {}", line, inSwitch);
			}

			if (inSwitch)
			{
				if (S_CLOSE_BRACE.equals(line))
				{
					instruction.addParameter(table);

					bytecodeInstructions.add(instruction);
					inSwitch = false;

					if (DEBUG_LOGGING_BYTECODE)
					{
						logger.debug("finished switch");
					}
				}
				else
				{
					String[] parts = line.split(S_COLON);

					if (parts.length == 2)
					{
						table.put(parts[0].trim(), parts[1].trim());
					}
					else
					{
						logger.error("Unexpected tableswitch entry: " + line);
					}
				}
			}
			else
			{
				try
				{
					Matcher matcher = PATTERN_BYTECODE_INSTRUCTION.matcher(line);

					if (matcher.find())
					{
						instruction = new BytecodeInstruction();

						String offset = matcher.group(1);
						String mnemonic = matcher.group(2);
						String paramString = matcher.group(3);
						String comment = matcher.group(4);

						if (mnemonic.endsWith("_w") && !Opcode.GOTO_W.equals(mnemonic) && !Opcode.JSR_W.equals(mnemonic)
								&& !Opcode.LDC_W.equals(mnemonic) && !Opcode.LDC2_W.equals(mnemonic))
						{
							mnemonic = mnemonic.substring(0, mnemonic.length() - "_w".length());
						}

						instruction.setOffset(Integer.parseInt(offset));
						instruction.setOpcode(Opcode.getByMnemonic(mnemonic));

						if (comment != null && comment.trim().length() > 0)
						{
							instruction.setComment(comment.trim());
						}

						if (instruction.getOpcode() == Opcode.TABLESWITCH || instruction.getOpcode() == Opcode.LOOKUPSWITCH)
						{
							if (DEBUG_LOGGING_BYTECODE)
							{
								logger.debug("Found a table or lookup switch");
							}

							inSwitch = true;
						}
						else
						{
							if (paramString != null && paramString.trim().length() > 0)
							{
								processParameters(paramString.trim(), instruction);
							}

							bytecodeInstructions.add(instruction);
						}
					}
					else
					{
						logger.error("could not parse bytecode: '" + line + "'");
					}
				}
				catch (Exception e)
				{
					logger.error("Error parsing bytecode line: '" + line + "'", e);
				}
			}
		}

		return bytecodeInstructions;
	}