1 #include"iostream.h" 2 #include "string" 3 #include <windows.h> 4 using namespace std; 5 6 typedef unsigned long u32; 7 typedef unsigned char u8; 8 typedef unsigned int u16; 9 u16 crc_16(u16 crc, u8 data); 10 u16 database_task(char*s,int length); 11 ///10100141b915 12 int main() 13 { 14 int len; 15 char s[512]; 16 char offset[512]; 17 u16 checksum=0; 18 HANDLE hOut; 19 hOut = GetStdHandle(STD_OUTPUT_HANDLE); 20 //SetConsoleTextAttribute(hOut,10); 21 cout<<"Designer: Milo lu @ March"<<endl; 22 while(1) 23 { 24 cin>>s; 25 if((!strcmp(s,"exit"))||(!strcmp(s,"EXIT"))) 26 { 27 break; 28 } 29 len = strlen(s); 30 if(len%2) //if not to be a 8bits array, going to rebuild, fill '0' at first. 31 { 32 len++; 33 strncpy(offset,s,len-1); 34 s[0]=0x30; 35 for(int i=0;i<len;i++) 36 { 37 s[i+1]=offset[i]; 38 } 39 s[i]=0; //NULL end flag 40 } 41 checksum = database_task(s,len); 42 if(checksum==0xffff) 43 { 44 continue; 45 } 46 cout<<"1010"; 47 cout.fill('0');cout.width(2);cout<<dec<<len/2; 48 cout.fill('0');cout.width(len);cout<<s; 49 cout.fill('0');cout.width(4);cout<<hex<<checksum<<endl; 50 } 51 return 0; 52 } 53 54 const unsigned short crc_table[256]={ 55 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 56 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, 57 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 58 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, 59 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 60 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, 61 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 62 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc, 63 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, 64 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b, 65 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 66 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a, 67 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, 68 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49, 69 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, 70 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78, 71 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, 72 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067, 73 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, 74 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256, 75 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, 76 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, 77 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, 78 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634, 79 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, 80 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3, 81 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 82 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92, 83 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 84 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1, 85 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 86 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0 87 }; 88 89 90 /************************************************ 91 function name: crc 16 92 using e.g. 93 crc = 0xffff; 94 for(i=0;i<bytes_length;i++) 95 { 96 crc = crc_16(crc,data_bytes_buf[i]); 97 } 98 return crc; 99 *** 100 parameter: crc, data 101 return: crc-16 102 ************************************************/ 103 u16 crc_16(u16 crc, u8 data) 104 { 105 u8 da; 106 107 da=(u8)(crc/256); 108 crc<<=8; //crc=crc*256 109 crc ^= crc_table[da^data]; 110 return(crc); 111 } 112 /////10100141b915 113 u16 database_task(char*s,int length) 114 { 115 u16 crc = 0xffff; 116 unsigned char hex[256]={0}; 117 for(int i=0;i<length/2;i++) 118 { 119 //high 4bits 120 if((*s>='A')&&('F'>=*s)) 121 { 122 hex[i]=*s++ - 0x37; 123 hex[i]<<=4; 124 } 125 else if((*s>='a')&&('f'>=*s)) 126 { 127 hex[i]=*s++ - 0x57; 128 hex[i]<<=4; 129 } 130 else if((*s>='0')&&('9'>=*s)) 131 { 132 hex[i]=*s++ - 0x30; 133 hex[i]<<=4; 134 } 135 else 136 { 137 cout<<"ERROR"<<endl; //other char break; 138 crc = 0xffff; 139 break; 140 } 141 //low 4bits 142 if((*s>='A')&&('F'>=*s)) 143 { 144 hex[i]|=*s++ - 0x37; 145 } 146 else if((*s>='a')&&('f'>=*s)) 147 { 148 hex[i]|=*s++ - 0x57; 149 } 150 else if((*s>='0')&&('9'>=*s)) 151 { 152 hex[i]|=*s++ - 0x30; 153 } 154 else 155 { 156 cout<<"ERROR"<<endl; 157 crc = 0xffff; 158 break; 159 } 160 crc = crc_16(crc,hex[i]); 161 } 162 return crc&0xffff; //because the u16 size is more than 16bits in PC system. 163 } 164 ///================== end file =========================
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