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play_recorder.go
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/
play_recorder.go
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package movegen
import (
"log"
"sync"
"github.com/domino14/word-golib/tilemapping"
"github.com/samber/lo"
"github.com/domino14/macondo/equity"
"github.com/domino14/macondo/move"
"github.com/domino14/macondo/tinymove"
)
var SmallPlaySlicePool = sync.Pool{
New: func() interface{} {
s := make([]tinymove.SmallMove, 0)
return &s
},
}
type PlayRecorderFunc func(*GordonGenerator, *tilemapping.Rack, int, int, move.MoveType, int)
func NullPlayRecorder(gen *GordonGenerator, a *tilemapping.Rack, leftstrip, rightstrip int, t move.MoveType, score int) {
}
func AllPlaysRecorder(gen *GordonGenerator, rack *tilemapping.Rack, leftstrip, rightstrip int, t move.MoveType, score int) {
switch t {
case move.MoveTypePlay:
startRow := gen.curRowIdx
tilesPlayed := gen.tilesPlayed
startCol := leftstrip
row := startRow
col := startCol
if gen.vertical {
// We flip it here because we only generate vertical moves when we transpose
// the board, so the row and col are actually transposed.
row, col = col, row
}
length := rightstrip - leftstrip + 1
if length < 2 {
return
}
word := make([]tilemapping.MachineLetter, length)
copy(word, gen.strip[startCol:startCol+length])
alph := gen.letterDistribution.TileMapping()
play := move.NewScoringMove(score, word, rack.TilesOn(), gen.vertical,
tilesPlayed, alph, row, col)
gen.plays = append(gen.plays, play)
case move.MoveTypeExchange:
// ignore the empty exchange case
if rightstrip == 0 {
return
}
alph := gen.letterDistribution.TileMapping()
exchanged := make([]tilemapping.MachineLetter, rightstrip)
copy(exchanged, gen.exchangestrip[:rightstrip])
play := move.NewExchangeMove(exchanged, rack.TilesOn(), alph)
gen.plays = append(gen.plays, play)
case move.MoveTypePass:
alph := gen.letterDistribution.TileMapping()
gen.plays = append(gen.plays, move.NewPassMove(rack.TilesOn(), alph))
default:
}
}
// AllPlaysSmallRecorder is a recorder that records all plays, but as "SmallMove"s,
// which allocate much less and are smaller overall than a regular move.Move
func AllPlaysSmallRecorder(gen *GordonGenerator, rack *tilemapping.Rack, leftstrip, rightstrip int, t move.MoveType, score int) {
switch t {
case move.MoveTypePlay:
startRow := gen.curRowIdx
startCol := leftstrip
row := startRow
col := startCol
if gen.vertical {
// We flip it here because we only generate vertical moves when we transpose
// the board, so the row and col are actually transposed.
row, col = col, row
}
length := rightstrip - leftstrip + 1
if length < 2 {
return
}
var moveCode uint64
tidx := 0
bts := 20 // start at a bitshift of 20 for the first tile
var blanksMask int
for i := startCol; i < startCol+length; i++ {
ml := gen.strip[i]
if ml == 0 {
// play-through tile
continue
}
it := ml.IntrinsicTileIdx()
val := ml
if it == 0 {
blanksMask |= (1 << tidx)
// this would be a designated blank
val = ml.Unblank()
}
moveCode |= (uint64(val) << bts)
tidx++
bts += 6
}
if gen.vertical {
moveCode |= 1
}
moveCode |= (uint64(col) << 1)
moveCode |= (uint64(row) << 6)
moveCode |= (uint64(blanksMask) << 12)
gen.smallPlays = append(gen.smallPlays, tinymove.TilePlayMove(
tinymove.TinyMove(moveCode), int16(score), uint8(gen.tilesPlayed),
uint8(length)))
case move.MoveTypeExchange:
// Not meant for this, yet.
log.Fatal("move type exchange is not compatible with SmallMove")
case move.MoveTypePass:
gen.smallPlays = append(gen.smallPlays, tinymove.PassMove())
default:
}
}
// TopPlayOnlyRecorder is a heavily optimized, ugly function to avoid allocating
// a lot of moves just to throw them out. It only records the very top move.
func TopPlayOnlyRecorder(gen *GordonGenerator, rack *tilemapping.Rack, leftstrip, rightstrip int, t move.MoveType, score int) {
var eq float64
var tilesLength int
var leaveLength int
switch t {
case move.MoveTypePlay:
startRow := gen.curRowIdx
tilesPlayed := gen.tilesPlayed
startCol := leftstrip
row := startRow
col := startCol
if gen.vertical {
// We flip it here because we only generate vertical moves when we transpose
// the board, so the row and col are actually transposed.
row, col = col, row
}
tilesLength = rightstrip - leftstrip + 1
// word is in gen.strip[startCol:startCol+length]
if tilesLength < 2 {
return
}
// note that this is a pointer right now:
word := gen.strip[startCol : startCol+tilesLength]
leaveLength = rack.NoAllocTilesOn(gen.leavestrip)
gen.placeholder.Set(word, gen.leavestrip[:leaveLength], score,
row, col, tilesPlayed, gen.vertical, move.MoveTypePlay,
gen.letterDistribution.TileMapping())
if len(gen.equityCalculators) > 0 {
eq = lo.SumBy(gen.equityCalculators, func(c equity.EquityCalculator) float64 {
return c.Equity(gen.placeholder, gen.board, gen.game.Bag(), gen.game.RackFor(gen.game.NextPlayer()))
})
} else {
eq = float64(score)
}
case move.MoveTypeExchange:
// ignore the empty exchange case
if rightstrip == 0 {
return
}
tilesLength = rightstrip
exchanged := gen.exchangestrip[:rightstrip]
leaveLength = rack.NoAllocTilesOn(gen.leavestrip)
gen.placeholder.Set(exchanged, gen.leavestrip[:leaveLength], 0,
0, 0, tilesLength, gen.vertical, move.MoveTypeExchange,
gen.letterDistribution.TileMapping())
eq = lo.SumBy(gen.equityCalculators, func(c equity.EquityCalculator) float64 {
return c.Equity(gen.placeholder, gen.board, gen.game.Bag(), gen.game.RackFor(gen.game.NextPlayer()))
})
case move.MoveTypePass:
leaveLength = rack.NoAllocTilesOn(gen.leavestrip)
alph := gen.letterDistribution.TileMapping()
gen.placeholder.Set(nil, gen.leavestrip[:leaveLength],
0, 0, 0, 0, false, move.MoveTypePass, alph)
eq = lo.SumBy(gen.equityCalculators, func(c equity.EquityCalculator) float64 {
return c.Equity(gen.placeholder, gen.board, gen.game.Bag(), gen.game.RackFor(gen.game.NextPlayer()))
})
default:
}
if gen.winner.Action() == move.MoveTypeUnset || eq > gen.winner.Equity() {
gen.winner.CopyFrom(gen.placeholder)
gen.winner.SetEquity(eq)
if len(gen.plays) == 0 {
gen.plays = append(gen.plays, gen.winner)
} else {
gen.plays[0] = gen.winner
}
}
}