source code of c/c++ functions

Question

I wanted to have a look at the implementation of different C/C++ functions (like strcpy, stcmp, strstr). This will help me in knowing good coding practices in c/c++. Could y

Answer 1

Look at an implementation of the libc standard C library. To see how a real, popular C library is implemented, try looking at the glibc code. You can access the code using git:

git clone git://sourceware.org/git/glibc.git

As for C++, you can find the glibc++ standard library on one of these mirrors:

http://gcc.gnu.org/mirrors.html

You can also check out uLibc, which will probably be simpler than the GNU library:

http://git.uclibc.org/uClibc/tree/

To give you a flavour, here's the strncpy implementation from uLibc:

Wchar *Wstrcpy(Wchar * __restrict s1, const Wchar * __restrict s2)
{
    register Wchar *s = s1;

#ifdef __BCC__
    do {
        *s = *s2++;
    } while (*s++ != 0);
#else
    while ( (*s++ = *s2++) != 0 );
#endif

    return s1;
}

Here is strcmp and strstr