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#include "../util.h"
#include "../crypto.h"
#include <stdio.h>
#include <stdint.h>
uint64_t fnv_1(uint8_t* in, size_t len, enum fnv_version A){
uint64_t hash = (A != v_0) * 0xcbf29ce484222325;
uint64_t prime = 0x100000001b3;
for(int i = 0; i != len; i++){
switch(A){
case v_1:
case v_0:
hash *= prime;
hash ^= in[i];
break;
case v_a:
hash ^= in[i];
hash *= prime;
break;
}
}
return hash;
}
int l_fnv_0(lua_State* L){
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
char digest[64];
uint64_t u = fnv_1(a, len, v_0);
sprintf(digest,"%16llx",u);
lua_pushstring(L, digest);
return 1;
}
int l_fnv_1(lua_State* L){
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
char digest[64];
uint64_t u = fnv_1(a, len, v_1);
sprintf(digest,"%16llx",u);
lua_pushstring(L, digest);
return 1;
}
int l_fnv_a(lua_State* L){
size_t len = 0;
uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);
char digest[64];
uint64_t u = fnv_1(a, len, v_a);
sprintf(digest,"%16llx",u);
lua_pushstring(L, digest);
return 1;
}
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