#ifndef __UTILS_H#define __UTILS_Hvoid memcpy(void *s1, const void *s2, int n);void memset(void *s, const char ch, int n);unsigned short ntohs(unsigned short s);unsigned long ntohl(unsigned long l);unsigned short htons(unsigned short s);unsigned long htonl(unsigned long l);unsigned long strtoul(char *s);void ultostr(char *s, unsigned long data);unsigned long strtobcd(char *s);unsigned long strtodec(char *str, int cnt);int strlen(const char *s);int strncmp(const char *s1, const char *s2, int maxlen);  #endif /* __UTILS_H */