1 #ifndef STRING_H
2 #define STRING_H
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10
11 extern long strlen(const char *s);
12 extern int strcmp(const char *s1, const char *s2);
13 extern int strncmp(const char *s1, const char *s2, long n);
14 extern char *strchr(const char *s, int c);
15 extern char *strcpy(char *dest, const char *src);
16 extern char *strncpy(char *dest, const char *src, long n);
17 extern char *strcat(char *dest, const char *app);
18 extern char *strrchr(const char *s, int c);
19 extern char *strpbrk(const char *s, const char *accept);
20 extern char *strstr(const char *s, const char *s2);
21
22 extern void *memcpy(void *dest, const void *src, long n);
23 extern void *memset(void *s, int c, int n);
24 extern int memcmp(const void *s1, const void *s2, long n);
25 extern void *memchr(const void *s, int c, int n);
26
27 extern const char *strerror(int num);
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29
30 #define strcoll strcmp
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34 #endif