nxu/hash.c

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C
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2023-02-06 10:28:44 -05:00
#include <stdint.h>
#include <stdio.h>
uint32_t hash(uint8_t *input) {
uint16_t x = 0x1234;
uint16_t y = 0xabcd;
uint16_t a = 0x2443;
uint16_t b = 0x118d;
uint8_t c;
uint16_t cc;
while (c = *input) {
cc = (c << 8) | c;
x = (x * a) + cc;
y = (y * b) + cc;
input++;
}
return (x << 16) | y;
}
int main(int argc, char **argv) {
printf("data1a %08x\n", hash("abc"));
printf("data1b %08x\n", hash("ebc"));
printf("\n");
printf("data2a %08x\n", hash("wigjewigjewigjewigjewigjewigjcncmnbegejgiwejgieg"));
printf("data2b %08x\n", hash("wigjewigjewigjewigjewigjewigjcmcmnbegejgiwejgieg"));
printf("\n");
printf("data3a %08x\n", hash("zzjiewgew"));
printf("data3b %08x\n", hash("zzjiewge"));
printf("\n");
printf("data4a %08x\n", hash("this is a test"));
printf("data4b %08x\n", hash("this is a test."));
return 0;
}