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

Question

Hi, This file String.h

i found while searching about string.h. Where i can find functions implementation of functions defined in string.h i.e [say] source code of "void *memcpy(void *, const void *, size_t); " Also i want to ask how to make ur functions as an interface with its implmentation hidden from developer as string.h functions has.

Answer 1

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.

Answer 2

I usually use Google Code Search to look up the implementation of standard library functions. For example, the implementation of memmove