6 extern void memcpy(void *dest, const void *src, int bytes);
7 extern void memmove(void *dest, void *src, int bytes);
8 extern int memcmp(const char *a2, const char *a1, int bytes);
9 extern int strcmp(const char *a2, const char *a1);
10 extern int strlen(const char *c);
11 extern void strcpy(char *a2, const char *a1);
12 extern void puts(const char *c);
13 extern void tohex(char *s, unsigned long l);
14 extern void puthex(unsigned long l);
15 extern int vsprintf(char *s, const char *fmt, va_list args);
16 extern int vsnprintf(char *s, int size, const char *fmt, va_list args);
17 extern int sprintf(char *s, const char *fmt, ...);
18 extern int snprintf(char *s, int size, const char *fmt, ...);