15 extern size_t strlen(const char *string);
16 extern size_t strnlen(const char *string, size_t maxlen);
17 extern int strcmp(const char *str1, const char *str2);
18 extern int strncmp(const char *str1, const char *str2, size_t maxlen);
19 extern int strcasecmp(const char *s1, const char *s2);
20 extern int strncasecmp(const char *s1, const char *s2, size_t maxlen);
21 extern char *strcpy(char *dst, const char *src);
22 extern char *strncpy(char *dst, const char *src, size_t num);
23 extern char *strcat(char *dst, const char *src);
24 extern char *strncat(char *dest, const char *src, size_t n);
25 extern char *strdup(const char *src);
26 extern char *strndup(const char *src, size_t length);
27 extern char *strchr(const char *str, int character);
28 extern char *strrchr(const char *str, int character);
29 extern char *strstr(const char *str1, const char *str2);
30 extern size_t strcspn(const char *haystack, const char *reject);
31 extern size_t strspn(const char *haystack, const char *accept);
33 extern char *strtok(char *str, const char *delim);
34 extern char *strtok_r(char *str, const char *delim, char **saveptr);
37 extern void *memset(void *dest, int val, size_t count);
38 extern void *memcpy(void *dest, const void *src, size_t count);
39 extern void *memmove(void *dest, const void *src, size_t count);
40 extern int memcmp(const void *mem1, const void *mem2, size_t count);
41 extern void *memchr(const void *ptr, int value, size_t num);