On: C Legacy Is Evil

[JoeAltmaier]

I clear structs using a template; saves copying and screwing up the length:

template <class C> SPL_INLINE_FORCE void Zero(C &c) { memset(&c, 0, sizeof(c)); }

struct tm tm_struct;

Zero(tm_struct);

[dezgeg → JoeAltmaier]

There's also a way to do this without any user-defined functions that works in both C and C++:

    struct tm tm_struct = { 0, };

[cremno → dezgeg]

In ISO C++ and GNU C you can also omit the 0:

    struct tm tm_struct = { };

[JoeAltmaier → dezgeg]

Does that work on char array members in the struct?

[dezgeg → JoeAltmaier]

Yes, as far as I believe, this should always work in standard C89/C99. In the char array case, it works due to the brace elision rule in aggregates: assuming

    struct foo { char bar[3]; };

These declarations are equivalent:

    struct foo f1 = { 0, };
    struct foo f2 = { { 0, } };

[readerrrr → JoeAltmaier]

In C, using: struct tm tm_struct = { 0 } ;, the rest of the struct including padding is initialized to zero bits.