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Rngnext

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This commit is contained in:
jl777
2019-03-22 01:22:31 -11:00
parent 6f6a9d28b2
commit b03e6652ac
1 changed files with 15 additions and 15 deletions
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30
src/cc/gamescc.cpp
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@@ -34,9 +34,21 @@ UniValue games_rawtxresult(UniValue &result,std::string rawtx,int32_t broadcastf
return(result); return(result);
} }
uint64_t games_rngnext(uint64_t initseed)
{
uint16_t seeds[4]; int32_t i;
for (i=0; i<4; i++)
{
seeds[i] = (seed >> (i*16));
seeds[i] = (seeds[i]*11109 + 13849);
}
seed = ((uint64_t)seeds[3] << 48) | ((uint64_t)seeds[2] << 24) | ((uint64_t)seeds[1] << 16) | seeds[0];
return(seed);
}
UniValue games_rng(uint64_t txfee,struct CCcontract_info *cp,cJSON *params) UniValue games_rng(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
{ {
UniValue result(UniValue::VOBJ); int32_t i,invertflag=0,n,playerid=0; uint16_t seeds[4]; uint64_t seed,initseed; bits256 hash; UniValue result(UniValue::VOBJ); int32_t i,invertflag=0,n,playerid=0; uint64_t seed,initseed; bits256 hash;
if ( params != 0 && ((n= cJSON_GetArraySize(params)) == 2 || n == 3) ) if ( params != 0 && ((n= cJSON_GetArraySize(params)) == 2 || n == 3) )
{ {
hash = jbits256(jitem(params,0),0); hash = jbits256(jitem(params,0),0);
@@ -44,7 +56,7 @@ UniValue games_rng(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
if ( n == 3 ) if ( n == 3 )
{ {
playerid = juint(jitem(params,2),0); playerid = juint(jitem(params,2),0);
if ( playerid >= 0x100 ) if ( playerid >= 0xff )
{ {
result.push_back(Pair("result","error")); result.push_back(Pair("result","error"));
result.push_back(Pair("error","playerid too big")); result.push_back(Pair("error","playerid too big"));
@@ -54,26 +66,14 @@ UniValue games_rng(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
if ( seed == 0 ) if ( seed == 0 )
{ {
playerid++; playerid++;
if ( playerid == 0x100 )
{
invertflag = 1;
playerid--;
}
for (i=0; i<8; i++) for (i=0; i<8; i++)
{ {
if ( ((1 << i) & playerid) != 0 ) if ( ((1 << i) & playerid) != 0 )
seed ^= hash.uints[i]; seed ^= hash.uints[i];
if ( invertflag != 0 )
seed ^= (uint64_t)-1;
} }
} }
initseed = seed; initseed = seed;
for (i=0; i<4; i++) seed = games_rngnext(initseed);
{
seeds[i] = (seed >> (i*16));
seeds[i] = (seeds[i]*11109 + 13849);
}
seed = ((uint64_t)seeds[3] << 48) | ((uint64_t)seeds[2] << 24) | ((uint64_t)seeds[1] << 16) | seeds[0];
result.push_back(Pair("playerid",(int64_t)(playerid - 1 + invertflag))); result.push_back(Pair("playerid",(int64_t)(playerid - 1 + invertflag)));
result.push_back(Pair("initseed",initseed)); result.push_back(Pair("initseed",initseed));
result.push_back(Pair("seed",seed)); result.push_back(Pair("seed",seed));