Decompose command.go; command keys become a handler table (step 7)

The ordinary command keys move into gameData.commandHandlers (method
expressions and small literals); dispatchKey keeps only re-dispatching
prefixes (runCommand/fightCommand/repeatCommand/moveOnCommand) and the
wizard fallthrough. command() splits into playTurn/turnUpkeep/
readCommand/executeCommand/countPrefix/ringTurnEffects; search gains
searchSpot/searchFloor; help gains helpOne/helpAll/helpLines; call
gains callTarget/callPrelude; wizardCommand splits in two plus
wizardKit; uLevel and current flatten to early returns. command.go is
complexity-clean. Behavior and RNG call order unchanged.

game/tables.go

@@ -142,6 +142,11 @@ type gameData struct {
 	// lands, indexed by monster letter - 'A': the cases of the fight.c
 	// attack switch. A true return means the monster removed itself.
 	hitHandlers [26]func(g *RogueGame, mp *Monster, mname string) bool
+
+	// commandHandlers dispatches the ordinary command keys: the simple
+	// cases of the big command.c switch. Keys that re-dispatch (runs,
+	// fight, repeat, move-on) and wizard keys stay in dispatchKey.
+	commandHandlers map[byte]func(g *RogueGame)
 }
 
 // ripWall is the repeated blank wall line of the tombstone art.
@@ -672,6 +677,140 @@ func newGameData() *gameData {
 			'V' - 'A': (*RogueGame).hitLifeDrainer,
 			'W' - 'A': (*RogueGame).hitLifeDrainer,
 		},
+
+		commandHandlers: map[byte]func(*RogueGame){
+			',': (*RogueGame).pickupCommand,
+			'!': (*RogueGame).shell,
+			'h': func(g *RogueGame) { g.moveHero(0, -1) },
+			'j': func(g *RogueGame) { g.moveHero(1, 0) },
+			'k': func(g *RogueGame) { g.moveHero(-1, 0) },
+			'l': func(g *RogueGame) { g.moveHero(0, 1) },
+			'y': func(g *RogueGame) { g.moveHero(-1, -1) },
+			'u': func(g *RogueGame) { g.moveHero(-1, 1) },
+			'b': func(g *RogueGame) { g.moveHero(1, -1) },
+			'n': func(g *RogueGame) { g.moveHero(1, 1) },
+			'H': func(g *RogueGame) { g.startRun('h') },
+			'J': func(g *RogueGame) { g.startRun('j') },
+			'K': func(g *RogueGame) { g.startRun('k') },
+			'L': func(g *RogueGame) { g.startRun('l') },
+			'Y': func(g *RogueGame) { g.startRun('y') },
+			'U': func(g *RogueGame) { g.startRun('u') },
+			'B': func(g *RogueGame) { g.startRun('b') },
+			'N': func(g *RogueGame) { g.startRun('n') },
+			't': func(g *RogueGame) {
+				if !g.promptDirection() {
+					g.After = false
+				} else {
+					g.missile(g.Delta.Y, g.Delta.X)
+				}
+			},
+			'q': (*RogueGame).quaff,
+			'Q': func(g *RogueGame) {
+				g.After = false
+				g.QComm = true
+				g.quit(0)
+				g.QComm = false
+			},
+			'i': func(g *RogueGame) {
+				g.After = false
+				g.inventory(g.Player.Pack, 0)
+			},
+			'I': func(g *RogueGame) {
+				g.After = false
+				g.pickyInven()
+			},
+			'd': (*RogueGame).dropIt,
+			'r': (*RogueGame).readScroll,
+			'e': (*RogueGame).eat,
+			'w': (*RogueGame).wield,
+			'W': (*RogueGame).wear,
+			'T': (*RogueGame).takeOff,
+			'P': (*RogueGame).ringOn,
+			'R': (*RogueGame).ringOff,
+			'o': func(g *RogueGame) {
+				g.option()
+				g.After = false
+			},
+			'c': func(g *RogueGame) {
+				g.call()
+				g.After = false
+			},
+			'>': func(g *RogueGame) {
+				g.After = false
+				g.dLevel()
+			},
+			'<': func(g *RogueGame) {
+				g.After = false
+				g.uLevel()
+			},
+			'?': func(g *RogueGame) {
+				g.After = false
+				g.help()
+			},
+			'/': func(g *RogueGame) {
+				g.After = false
+				g.identify()
+			},
+			's': (*RogueGame).search,
+			'z': func(g *RogueGame) {
+				if g.promptDirection() {
+					g.doZap()
+				} else {
+					g.After = false
+				}
+			},
+			'D': func(g *RogueGame) {
+				g.After = false
+				g.discovered()
+			},
+			CTRL('P'): func(g *RogueGame) {
+				g.After = false
+				g.msg("%s", g.Msgs.Huh)
+			},
+			CTRL('R'): func(g *RogueGame) {
+				g.After = false
+				g.refresh()
+			},
+			'v': func(g *RogueGame) {
+				g.After = false
+				g.msg("version %s. (mctesq was here)", Release)
+			},
+			'S': func(g *RogueGame) {
+				g.After = false
+				g.saveGame()
+			},
+			'.': func(*RogueGame) {
+				// rest command
+			},
+			' ': func(g *RogueGame) {
+				g.After = false // "legal" illegal command
+			},
+			'^': (*RogueGame).identifyTrapCommand,
+			Escape: func(g *RogueGame) {
+				g.DoorStop = false
+				g.Count = 0
+				g.After = false
+				g.Again = false
+			},
+			')': func(g *RogueGame) {
+				g.current(g.Player.CurWeapon, "wielding", "")
+			},
+			']': func(g *RogueGame) {
+				g.current(g.Player.CurArmor, "wearing", "")
+			},
+			'=': func(g *RogueGame) {
+				g.current(g.Player.CurRing[Left], "wearing",
+					g.chooseTerse("(L)", "on left hand"))
+				g.current(g.Player.CurRing[Right], "wearing",
+					g.chooseTerse("(R)", "on right hand"))
+			},
+			'@': func(g *RogueGame) {
+				g.StatMsg = true
+				g.status()
+				g.StatMsg = false
+				g.After = false
+			},
+		},
 	}
 }