Function MainExecuteScript

source/AutoHotkey.cpp:282–323

int MainExecuteScript()
{
	
#ifndef _DEBUG
	__try
#endif
	{
		// Run the auto-execute part at the top of the script (this call might never return):
		if (!g_script.AutoExecSection()) // Can't run script at all. Due to rarity, just abort.
			return CRITICAL_ERROR;
		// REMEMBER: The call above will never return if one of the following happens:
		// 1) The AutoExec section never finishes (e.g. infinite loop).
		// 2) The AutoExec function uses the Exit or ExitApp command to terminate the script.
		// 3) The script isn't persistent and its last line is reached (in which case an ExitApp is implicit).

		// Call it in this special mode to kick off the main event loop.
		// Be sure to pass something >0 for the first param or it will
		// return (and we never want this to return):
		MsgSleep(SLEEP_INTERVAL, WAIT_FOR_MESSAGES);
	}
#ifndef _DEBUG
	__except (EXCEPTION_EXECUTE_HANDLER)
	{
		LPCTSTR msg;
		auto ecode = GetExceptionCode();
		switch (ecode)
		{
		// Having specific messages for the most common exceptions seems worth the added code size.
		// The term "stack overflow" is not used because it is probably less easily understood by
		// the average user, and is not useful as a search term due to stackoverflow.com.
		case EXCEPTION_STACK_OVERFLOW: msg = _T("Function recursion limit exceeded."); break;
		case EXCEPTION_ACCESS_VIOLATION: msg = _T("Invalid memory read/write."); break;
		default: msg = _T("System exception 0x%X."); break;
		}
		TCHAR buf[127];
		sntprintf(buf, _countof(buf), msg, ecode);
		g_script.CriticalError(buf);
		return ecode;
	}
#endif 
	return 0; // Never executed; avoids compiler warning.
}