手机浏览器网页加速器,360网站推广官网怎么优化,深圳网站建设培训机构,互动营销案例分析1、BCC异或校验 从输入的HEX第一个字节开始#xff0c;按字节依次循环计算异或值直到HEX结尾字节#xff0c;得到的最终一个字节值。 2、C程序 /******************************************************************************* _____ ___ ____ ___ _____ _ …1、BCC异或校验 从输入的HEX第一个字节开始按字节依次循环计算异或值直到HEX结尾字节得到的最终一个字节值。 2、C程序 /******************************************************************************* _____ ___ ____ ___ _____ _ _ _ | ____|_ _| _ \|_ _| |_ _|__(_)_ __ __ _| | | |_ _ __ _ | _| | || |_) || | | |/ __| | _ \ / _ | |_| | | | |/ _ | | |___ | || _ | | | |\__ \ | | | | (_| | _ | |_| | (_| | |_____|___|_| \_\___| |_||___/_|_| |_|\__, |_| |_|\__,_|\__,_|* File Name : main.c* Description : This file provides code for bcc caculation in linuxc.* Author : jackwang by jiawang16foxmail.com* Date : 2019-03-09 *******************************************************************************/ /*! -------------------------------------------------------------------------- */ /*! Include headers */ #include stdio.h #include string.h #include stdbool.h/*! -------------------------------------------------------------------------- */ /*! Private function declarations */ static unsigned char Char2Int(char chr,bool *isOK);/*! convert char to int type*/ static unsigned char HexStr2Int(char *str, bool *isOK);/*!convert hexstr to int*//*! -------------------------------------------------------------------------- */ /*! main function defination */ int main(int argc, char* argv[]) {int ret 0;int numByte argc; char bccVal 0x00;char inPutbuff[10];bool isOK;int Nibb;if(argc 1){printf([note] no params to caculate, please input hex string, splite by space!\r\n);}else{printf([note] input %d byte: ,numByte-1);for(int i 1; i numByte; i){printf(%s ,argv[i]);}printf(\r\n);for(int i 1; i numByte; i){memcpy(inPutbuff,argv[i],2);Nibb HexStr2Int(inPutbuff,isOK);if(isOK){bccVal ^ (char)Nibb;}}printf(\r\n);printf([note] bcc value: %02X\r\n,bccVal);}return 0; }/*! -------------------------------------------------------------------------- */ /*! Private function definations */ /*! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ static int Char2Int(char chr,bool *isOK) {int nibb1;if(chr 0 chr 9){ nibb1 chr - 0; *isOK true;}else if(chr a chr f){ nibb1 chr - a 10; *isOK true;}else if(chr A chr F){ nibb1 chr -A 10; *isOK true; }else{ printf([error] invalid hex str input: %c \r\n,chr); *isOK false; }return nibb1; } /*! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ static int HexStr2Int(char *str, bool *isOK) {int nibb1,nibb2;bool isOK1,isOK2;nibb1 Char2Int(*str, isOK1);nibb2 Char2Int(*(str1),isOK2);if(isOK1 isOK2){*isOK true;return nibb1*16 nibb2;}else{*isOK false;return 0;} } 3、编译 ~$ gcc main.c -o getbcc 4、使用 ~$ ./getbcc 01 02 03 04 11 ~$ [note] input 5 byte: 01 02 03 04 11 ~$ [note] bcc value: 15