|
Hello everyone!
I want to make a (purpose-specific) scripting language... Similar to JavaScript, but somewhat simpler. How would I do that? I don't know ASM... How do I make a parser for the language? Something like...
; Check for response<br />
!result = mb "Hello!" $msg ??? ???<br />
<br />
; If OK was pressed,<br />
if !result = MB_PRESS_OK<br />
; Then it's OK.<br />
mb "Bye!" $msg2<br />
endif
I doubt I'll really need math at all, but... Any ideas? Thanks!
Windows Calculator told me I will die at 28. 
|
|
|
|
|
There is at least one edit box designed to syntax highlight code here on CP ( I used it years ago to build a Python IDE ), I imagine it would have code that would show some good direction in how to parse a file looking for keywords for code.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
|
|
|
|
|
Can't find it...  Does anyone know where it is? Thanks!
Windows Calculator told me I will die at 28. 
|
|
|
|
|
For writing a parser you can use flex and bison. Both are freeware tools. As target language it is not necessary to use ASM. You could use any language for that. Since bison fully supports C code, you als can handle the input for teh parser directly to perform you calculations. This is waht an interpreter normally would do.
I hope you have a lot of spare time. Writing compilers is a lot of work
|
|
|
|
|
I am currently using the Typelib wrappers for MSXML that was generated from the MFC Typelib Class wizard. I think I am using the objects incorrectly, and this is generating unhandled exception errors.
I use wizard MFC Class from Typelib to generate wrapper classes for the MSXML5 control (CXMLDOMDocument, CXMLDOMElement, CXMLDOMNode, and CXMLNodeList). The exception occurs when I pass a CXMLDOMNode reference to a function that I want it to work on by stepping down farther in the node tree. For example:
If(m_XMLDOMroot.hasChildNodes())
{
int rootchildcount = RootNodeList.get_length();
for(int i = 0; i < rootchildcount; ++i)
{
CXMLDOMElement childnode = RootNodeList.get_item(i); <- This code sometimes user breaks
SetChildNode(childnode);
}
}
Robert
|
|
|
|
|
Is SetChildNode(...) removing nodes/elements from the NodeList? This causes the length of the NodeList to decrease as your looping which causes 2 errors.
1) If rootchildcount was originally 10, and nodes are being removed, your still comparing against a length of 10, even though there are fewer than 10 nodes in the list.
2) Incrementing i for any iteration where a node was removed from the list, will cause your code to skip over the node (in the nodelist) following the node that was just removed.
|
|
|
|
|
To answer you question, and give move clarification. I am not removing any nodes. I am just accessing them to pull the information out of the nodes.
I have notice that in some case the nodelist size if different sizes, cause sometimes there is a TEXT_Element in the list. I just do not understand this nomial yet. But this is for different files.
Robert
-- modified at 14:10 Thursday 10th August, 2006
|
|
|
|
|
I would suggest that you change your code to check the length of the node list on every iteration of the loop.
if(m_XMLDOMroot.hasChildNodes())
{
for(int i = 0; i < RootNodeList.get_length(); ++i)
{
CXMLDOMElement childnode = RootNodeList.get_item(i); <- This code sometimes user breaks
SetChildNode(childnode);
}
}
|
|
|
|
|
I did what you sugguested, and the size of the rootNodeList is not changing.
So any other sugguestions?
BTW- Thanks for all the help given so far.
Robert
|
|
|
|
|
What's the exception your getting?
|
|
|
|
|
How can I get what file handle is associated with an open file if I only know the name of the file? In VC++6 please.
|
|
|
|
|
I think that would require a device driver of some sort. Can you get by with parsing the output from Handle?
"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank
"Judge not by the eye but by the heart." - Native American Proverb
|
|
|
|
|
Hi,
CDocument which handles all serialization.
Ex: if your CSampleDoc is derived from CDocument means
CSampleDoc::Serialize(CArchieve &ar)
{
ar.GetFile() //to get the file handle
}
|
|
|
|
|
Do you want to open a file and get a handle for it?
|
|
|
|
|
The problem is:
- I open a file
- do somth. with it.
- close it [fclose(f)]
- try to delete it
- it doesn't delete
I replaced fclose(f) with fcloseall() and thing went to normal.
|
|
|
|
|
Can you show your code,please
|
|
|
|
|
|
Hi there,
I'm trying to write a BHO that will intercept the load of any image
on a web page and prevent the images from being loaded.
I've searched through this site and others, and I've only found examples
which rely on waiting for the documentcomplete event to be fired.
The problem in my case is that I'm trying to accelerate the loading of
particular web pages and if I have to wait until the whole document is loaded to remove any images, it's already too late for me -- the user's
already preformed the long and costly download of the images.
How would I go about modifying the HTML content the browser is about to render on the fly as it downloads it? Is that even possible?
(If that's not possible, I might be okay with saving the HTML source to disk, modifying the code to remove any tags and then having my browser
render that temporary file. I'd like it to appear from coming from the same site though.. so for example, if they hit google.com, I'd like the address
bar to still say google.com but render the content from C:\temp\google.htm or whatever.)
Thanks very much in advance for any pointers!!!!
|
|
|
|
|
Laugh if you will, but I am looking for a speedy way of storing arrays of integers into the registry. Let me explain, my app has a listview control with 19 columns. There are 4 sets of data which can be displayed in this listview. Depending on which data set the user chooses, the column widths will change. Therefore for each column (4 * 19) I need to store the width.
I have created a basic function to loop through the column each time the data set changes and to store the values into the registry. Writing 19 values. The problem is, it takes too long maybe half a second each time which is noticable to the user. Can anybody suggest a faster way to do the same job?
|
|
|
|
|
Would it suffice to keep track of the column widths everytime they change, but write them to the registry only when the user exits the app?
/ravi
|
|
|
|
|
I feel like kicking myself, infact I think I will. It is kinda stupid writing to the registry when most of the time the values do not change. I changed the function slightly to write only when the value changes in the mean time keeping track of the values in memory.
Thanks for that.
|
|
|
|
|
Don't kick yourself!  Instead, pat yourself on the back. You've just seen the value of "first get it to work, then improve its performance".
/ravi
|
|
|
|
|
I usually go one step further than the above suggestion and store the settings only if the user manually changed them.
Another thing I often do is store all the column settings as a single string with delimeters.
Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke
|
|
|
|
|
If I start up an MDI application, a new document appears in the
Window. How can I make that new document not appear and instead
an introductionary dialog box appear? I tried redoing the
CDoc::OnNewDocument(), but thats not making the new document not
appear (alot of nots!!).
Please, any response any one can give me will be greatly appreciated.
Sincerely,
Danielle Brina
|
|
|
|
|
This will prevent the new document (Put in your application ::InitInstance after ParseCommandLine).
// Added to prevent New Empty Document at startup
if (cmdInfo.m_nShellCommand==CCommandLineInfo::FileNew) {
cmdInfo.m_nShellCommand=CCommandLineInfo::FileNothing;
}
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
