How to copy string at specified memory location?

[Chintan Shah]

I have a string and i want to copy at specified memory location.
Suppose i have a pre-allocated memory represented by

char* logFile (unsafe code)

I have a generated string which contains the name of log file.
I want to copy that string on location represented by char*.

Please help me on this.
=============== =============== =============== =============== =

Also i have to copy specified number of characters from a given location
to specified location.

The code in delphi looks something like:

StrLCopy(msg, PChar(gsRootErr orMsg), MAX_ERR_MESSAGE );
where msg is character pointer:msg: PChar
and gsRootErrorMsg is string.


Help would be really appreciated.
Thanks.

[Samuel Jones]

I can try to help, but you will need to help me understand this StrLCopy thing.

This is what i can guess it does.
StrLCopy(dest, source, number)

StrLCopy copies the first 'number' of characters from the string specified as 'source', to the 'dest' string

Am i right? If so, i can help, otherwise a little more explanation please.

[Chintan Shah]

No

Destination and source are memory locations.
So StrLCopy will copy the max number of characters from the memory address of source to memory address of destination.

[GaryTexmo]

I did some digging on this... I'm not sure how to get the memory address of a string in C# since it seems you can't get the address of a managed type.

That said, you can use a char array... Have a look at the following:

            string str = "blah";
            char[] b = new char[str.Length];
            str.CopyTo(0, b, 0, str.Length);

            foreach (char c in b)
                Console.Write(c);
            Console.WriteLine();

            unsafe
            {
                fixed (char* p = b)
                {
                    Console.WriteLine((int)p);
                    *p = 'f';
                }
            }

            foreach (char c in b)
                Console.Write(c);
            Console.WriteLine();

Have a read here: http://www.codeproject.com/KB/cs/csunsafeintro01.aspx

Also, here's some discussion on a C# equivalent of memset: http://stackoverflow.com/questions/1...of-memset-in-c