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