#pragma once #define DIT_BUFSIZE 1024 extern unsigned short GetCRC(unsigned char *p, unsigned short n); extern unsigned short GetCRC2(unsigned char *p, unsigned short n); extern WORD calccrc(BYTE crcbuf, WORD crc); extern WORD calccrc(BYTE crcbuf, WORD crc, WORD polynom); extern WORD chkcrc(BYTE *buf, WORD len); extern WORD chkcrc(BYTE *buf, WORD len, WORD polynom); extern void crc_calc_sinopec(BYTE *ptr_buffer, WORD length); extern unsigned long power(int base, int times); extern unsigned long BCDtoDec(unsigned char *bcd, int len); extern int DectoBCD(int Dec, unsigned char *bcd, int len); extern bool checkEscapeCharacter(BYTE buf[DIT_BUFSIZE], int& len, BYTE ch); extern bool transEscapeCharacter(BYTE buf[DIT_BUFSIZE], int& len, BYTE ch); extern bool calcEscapeLength(const BYTE buf[DIT_BUFSIZE], int& len, BYTE ch);