// rename str... and mem... functions to my_str... and my_mem...

#undef strspn
#undef strcspn
#undef strcat
#undef strcpy
#undef strncpy
#undef strchr
#undef strrchr
#undef strstr
#undef memcpy
#undef memset

#define strspn	my_strspn
#define strcspn	my_strcspn
#define strcat	my_strcat
#define strcpy	my_strcpy
#define strncpy	my_strncpy
#define strchr	my_strchr
#define strrchr	my_strrchr
#define strstr	my_strstr
#define memcpy	my_memcpy
#define memset	my_memset

size_t strspn( const char *s1, const char *s2);
size_t strcspn( const char *s1, const char *s2);
char *strcat( char * restrict s1, const char * restrict s2);
char *strcpy( char * restrict s1, const char * restrict s2);
char *strncpy( char * restrict s1, const char * restrict s2, size_t n);
char *strchr( const char *s, int c);
char *strrchr( const char *s, int c);
char *strstr( const char *s1, const char *s2);
void *memcpy( void * restrict v1, const void * restrict v2, size_t size);
void *memset( void *v, int c, size_t size);