510
Subj : Re: String memory Allocation
To   : borland.public.cpp.borlandcpp
From : Ed Mulroy [TeamB]
Date : Sun Oct 03 2004 04:38 pm

> Or a pointer inside that string. ...

Yes, that is what I said, a pointer to the memory which was passed to 
the function when it was called.

> , i.e. if the first argument is 0, strtok() is to
> continue the previous tokenization. For this
> to work, strok() needs some internal memory....

Unless it has changed significantly from how the RTL in BC++ does it 
versus that in BCB, and BCB's C-style functions generally mimic those 
in the 32 bit BC++ RTL, there is a per-thread pointer, 4 bytes, used 
by strtok, part of the per-thread memory block pointed to by TLS.

..  Ed

> Thomas Maeder wrote in message
> news:m2655ritne.fsf@madbox2.local...
> "Ed Mulroy [TeamB]" <dont_email_me@invalid.com> writes:
>
> Or a pointer inside that string.
>
> To tokenize
>
> char input[16] = "abc,d,efg";
>
> at ',' boundaries, you'd first do
>
> char const *firstToken(strtok(input,","));
>
> and then, until strok() returns 0,
>
> char const *subsequentToken(strtok(0,","));
>
> , i.e. if the first argument is 0, strtok() is to continue
> the previous tokenization. For this to work, strok()
> needs some internal memory.

.

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