diff options
Diffstat (limited to 'lib/rng.go')
| -rw-r--r-- | lib/rng.go | 13 |
1 files changed, 7 insertions, 6 deletions
@@ -22,7 +22,7 @@ var mtF uint32 = 1812433253 // MT19937 instance struct type MTRand struct { GenSt [624]uint32 - index uint32 + Index uint32 initialized bool } @@ -30,7 +30,7 @@ var mtLowerMask uint32 = (1 << mtCoefR) - 1 var mtUpperMask uint32 = 0xFFFFFFFF & (^mtLowerMask) func (r *MTRand) Seed(s uint32) { - r.index = mtCoefN + r.Index = mtCoefN r.GenSt[0] = s for i := uint32(1); i < mtCoefN; i++ { r.GenSt[i] = (0xFFFFFFFF & @@ -40,20 +40,21 @@ func (r *MTRand) Seed(s uint32) { } func (r *MTRand) Extract() uint32 { - if !r.initialized || r.index >= mtCoefN { + if !r.initialized || r.Index >= mtCoefN { if !r.initialized { r.Seed(5489) } r.twist() } - y := r.GenSt[r.index] + y := r.GenSt[r.Index] + y = y ^ ((y >> mtCoefU) & mtCoefD) y = y ^ ((y << mtCoefS) & mtCoefB) y = y ^ ((y << mtCoefT) & mtCoefC) y = y ^ (y >> mtCoefL) - r.index = r.index + 1 + r.Index = r.Index + 1 y = 0xFFFFFFFF & y return y @@ -69,7 +70,7 @@ func (r *MTRand) twist() { } r.GenSt[i] = r.GenSt[(i+mtCoefM)%mtCoefN] ^ xA } - r.index = 0 + r.Index = 0 } func (r *MTRand) UnTemper(y uint32) uint32 { |