Re: strtok and strtok_r

In article <6JOdnW7Dx7Nq9XDbnZ2dnUVZ_gydnZ2d@xxxxxxxxxxx>,
Joe Wright <joewwright@xxxxxxxxxxx> wrote:

I don't want to check strlen for error. SIZE_MAX may well be valid.
Passing in a NULL should be a NOP in my view.

size_t strlen(const char *s) {
size_t r = 0;
if (s) while (*s++) ++r;
return r;
}

Then how will you distinguish between the string containing just
the terminating nul, and the null pointer?? strlen() is often
used to determine array indices; you don't want to be indexing
the NULL pointer (for one thing, the result of the indexing
might get you to a readable or writable memory location -- and yes,
there are real systems on which virtual addresses near 0 are
accessible.)
--
Okay, buzzwords only. Two syllables, tops. -- Laurie Anderson
.

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