> realloc(ptr, 0) is free I didn't know that so I went to read up on that. Turns out, this is true for C90, but apparently implementation-defined in C99 [1].

> realloc(ptr, 0) is free I didn't know that so I went to read up on that. Turns out, this is true for C90, but apparently implementation-defined in C99 [1]. (But as the library creator you could of course define the behaviour that the provided function must have.) [1] http://www.cplusplus.com/reference/cstdlib/realloc/ http://www.cplusplus.com/reference/cstdlib/realloc/