Re: memcmp versus strstr; reaction to chr(0)
 

Walter Dnes wrote:

> When I asked in another thread about string comparisons, I forgot
> about the chr(0) booby-trap in C strings. Since I want to compare
> random binary data, this is important to me. Someone correct me if I'm
> wrong; strstr stops at chr(0). memcmp doesn't treat chr(0) as a
> delimiter, and can compare ranges (the word "strings" is incorrect here)
> that included embedded chr(0). I realize that memcmp won't
> automatically scan a larger string, but I can put it in a loop to sweep
> through a larger string. Too bad that memmem is not standard.
>

The function memcmp() compares two regions of memory.
The function strstr() searches a string for another (sub-)string.
A string is a collection of chars terminated by a '\0'. If the
string is not terminated correctly, undefined behavior occurs.

--
Thomas Matthews

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