1   Instructions

You must implement the following functions, whose behavior must match the documentation for the standard function of the same name (without my_):

const char *my_strchr(const char *s, int c);
unsigned my_strlcpy(char *dst, const char *src, unsigned n);
unsigned my_strlcat(char *dst, const char *src, unsigned n);
int my_strncmp(const char *s1, const char *s2, unsigned n);
void *my_memcpy(void *dst, const void *src, unsigned n);
void *my_memset(void *dst, int c, unsigned n);

You can optionally also implement the following for a higher grade (see Grading below):

const char *my_strrchr(const char *s, int c);
const char *my_strpbrk(const char *s1, const char *s2);
const char *my_strstr(const char *s1, const char *s2);
void *my_memmove(void *dst, const void *src, unsigned n);

Constraints:

• each function must be implemented in a .c file of its own, named after the function it contains. The function prototypes must be declared in a .h file, in accordance with the C coding standard. The submitted archive may (but needs not) include a test program.
• you must not include any standard/system header in your code; nor use any function from the standard C library.

2   Grading

• 1 point per function correctly implemented in the mandatory list.
• +0.5 if all of the above, and a Makefile places the functions in libminic.a.
• +0.5 per optional function correctly implemented after all of the above.
• +0.5 if the submitted archive includes a README file alongside the source files, containing a valid explanation of why this assignment uses “const char *” for my_strchr/my_strrchr whereas the C library uses “char *” for strchr/strrchr.
• +1 point for “cleverness” in either my_strstr, my_memcpy or my_memmove, provided with an explanation and empirical proof of the improvement compared to a naive implementation.