4 char *revstr(char *str);
5 char *strupper(char *str);
6 char *strlower(char *str);
9 char *mkstr (const char *format, ... );
10 char *strconcat (const char *str, ...);
12 int safe_strcmp(const char *s1, const char * s2);
16 char *getaline(FILE *f);
25 int snprintf (char *str, size_t count, const char *fmt, ...);
27 #ifndef HAVE_VSNPRINTF
28 int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);