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| #include <stdio.h> | |
| unsigned int jauquet(char *str) { | |
| //jauquet prime = 79087987342985798987987 | |
| //mod 2 ^ 32 = 2053222611 | |
| //mod 2 ^ 64 = 6795498992951210195 | |
| unsigned int hash = 6795498992951210195; | |
| unsigned int shift = 611; | |
| int c; | |
| while (c = *str++) | |
| hash = hash * shift + c; | |
| return hash; | |
| } | |
| int main(){ | |
| int wordCount = 109583; | |
| int tableSize = wordCount * 2; | |
| int jauquet_hashTable[tableSize]; | |
| int jauquet_collisions = 0; | |
| unsigned int jauquet_temp; | |
| int size = 1024, pos; | |
| int c; | |
| char *buffer = (char *)malloc(size); | |
| FILE *f = fopen("wordsEn.txt", "r"); | |
| if(f) { | |
| do { // read all lines in file | |
| pos = 0; | |
| do{ // read one line | |
| c = fgetc(f); | |
| if(c != EOF) buffer[pos++] = (char)c; | |
| if(pos >= size - 1) { // increase buffer length - leave room for 0 | |
| size *=2; | |
| buffer = (char*)realloc(buffer, size); | |
| } | |
| }while(c != EOF && c != '\n'); | |
| buffer[pos] = 0; | |
| // line is now in buffer | |
| jauquet_temp = jauquet(buffer) % tableSize; | |
| if(!jauquet_hashTable[jauquet_temp]){ | |
| jauquet_hashTable[jauquet_temp] = 1; | |
| } else { | |
| jauquet_collisions++; | |
| } | |
| } while(c != EOF); | |
| fclose(f); | |
| } | |
| free(buffer); | |
| printf("djb2 %i\n", jauquet_collisions); | |
| return 0; | |
| } |
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