Thread: Playing around strlen :)

Code:

//They said passing by reference gives better performance:

int strlen_byref(char **str)

That's not passing by reference. You cannot pass by reference in C. That's passing a pointer to a pointer, by value, and it only decreases performance.

You can't stop a crash from occurring when passing in an uninitialised pointer. Checking for NULL is the caller's responsibility, as usually the passed pointer is to a buffer and would not be NULL.

Comments are welcome

Questions are welcome

>int strlen(char *str)
The library strlen() returns a size_t versus an int, which would allow for longer strings. I like strlen_simple(), but with a char *str instead of char **str as the parameter. It requires one local variable versus the first version, but I don't see where that makes it less attractive than the first version.