12 #define NULL ((void*)0)
17 #include <bits/alltypes.h>
20 int bcmp (const void *, const void *, size_t);
21 void bcopy (const void *, void *, size_t);
22 void bzero (void *, size_t);
26 char *index (const char *, int);
27 char *rindex (const char *, int);
29 int strcasecmp (const char *, const char *);
30 int strncasecmp (const char *, const char *, size_t);