kopia lustrzana https://github.com/N0BOY/FT8CN
65 wiersze
1.1 KiB
C
65 wiersze
1.1 KiB
C
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#include "hash22.h"
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#include "stdlib.h"
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#include "string.h"
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//m为hash的长度，12，22
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//call的长度是12（包括'\0'）
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uint32_t hashcall(char* call, int m)
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{
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const char *chars = " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ/";
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char callsign[11]=" ";
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char *temp=call;
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int j=0;
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while(temp[0] == ' '){
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++temp;
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if (temp[0]!=' ')
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{
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break;
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}
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j++;
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}
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for (int i = 0; i < 11-j; i++)
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{
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if (temp[i]=='\0')
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{
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break;
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}else{
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callsign[i]=temp[i];
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}
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}
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uint64_t x = 0;
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for(int i = 0; i < 11; i++){
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int c = (int)callsign[i];
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const char *p = strchr(chars, c);
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if (p==NULL)
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{
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return 0;
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}
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int j = p - chars;
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x = 38*x + j;
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}
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x = x * 47055833459LL;
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x = x >> (64 - m);
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return x;
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}
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uint32_t hashcall_10(char* call){
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return hashcall(call,HASH_10);
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}
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uint32_t hashcall_12(char* call){
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return hashcall(call,HASH_12);
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}
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uint32_t hashcall_22(char* call){
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return hashcall(call,HASH_22);
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} |