Where can I get the source code of string.h; not function prototypes, but implementation of functions

Question

String.h

I found this while searching about string.h . Where can I find the source code of functions defined in string.h ?

ie [say] source code of

void    *memcpy(void *, const void *, size_t); 

Also I want to ask how to make your functions as an interface with its implmentation hidden from developer as string.h functions has.

Answer 1

这是来自Ohloh代码搜索的memmove 。

Answer 2

Put your function declarations in a .h file and your implementation in a .c file. Compile the .c file into a .o file (.obj on Windows) and link it together with your code.

For the implementation of string.h functions, get the GNU libc source.