On 28/05/2010 2:02 PM, James Paige wrote:
How do zstrings work?
Back in the days of the one C/C++ class I took, I remember learning that
zstrings were a zero-terminated string buffer.
That's correct (but, they call it char*).
They were no good for storing arbitrary binary data, because the first 0
would terminate the string, causing any data from the 0 to the end of
the buffer to be ignored.
That is also correct.
Am I correct to assume that the zstring ptr's used in Reload are not
like that?
I would hate to be losing saved tag data beccause 8 or more
low-numbered tags in a row happened to all be off.
>
Please put my probably-unfounded fears to rest :)
No, ZStrings in FB work exactly like that.
However... ;)
There's nothing magical about a ZString or a char*. It's the string
functions which care about the null terminator. Otherwise, it's just an
arbitrarily sized chunk of memory.
If you ask RELOAD for a String back, you'll only get up to the first
null. But, if you ask for the ZString, you get the pointer to which you
can do whatever you want (up to the actual size of the memory block).
---
James
--
Mike
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