8 #define NULL ((void *) 0)
11 extern int strcmp(const char *, const char *);
12 extern int strncmp(const char *, const char *, int);
13 extern char *strcpy(char *, const char *);
14 extern char *strcat(char *, const char *);
15 extern size_t strlen(const char *);
16 extern char *strchr (const char *, int);
17 extern char *strrchr (char *, int);
18 extern char *strdup(const char *);
19 extern void *memset(void *, int , size_t);
20 extern void *memset_word(void *, unsigned short, size_t);
21 extern void *memcpy(void *, const void *, size_t);
22 extern void *memmove(void *, const void *, size_t);
23 extern int memcmp(const void *, const void *, size_t);
26 #endif /* _STRING_H */