1 #ifndef STR_H 2 #define STR_H 3 4 extern unsigned int str_copy(char *,const char *); 5 extern int str_diff(const char *,const char *); 6 extern int str_diffn(const char *,const char *,unsigned int); 7 extern unsigned int str_len(const char *); 8 extern unsigned int str_chr(const char *,int); 9 extern unsigned int str_rchr(const char *,int); 10 extern int str_start(const char *,const char *); 11 12 #define str_equal(s,t) (!str_diff((s),(t))) 13 14 #endif 15