Merge refactor/god-object-extraction (refactor step 6)

Refactor step 6. MessageLine (was MsgLine) owns the msg/addmsg/endmsg
machinery, wired to its screen, pre---More-- redraw, and input via
attach(); RogueGame keeps one-line msg/addmsgf/endmsg shorthands so
the ~400 call sites are unchanged. Player gains nextPackChar and
removeFromPack (the state half of pack.c leave_pack); leavePack keeps
only the LastPick repeat-command tracking. Level gains ObjectAt
(misc.c find_obj) and AddObject/RemoveObject/AddMonster/RemoveMonster,
replacing direct attach/detach calls on the level lists. Inventory and
pickup UI flows stay on RogueGame: display and orchestration, not
state surgery. Behavior and RNG order unchanged; suite green.

TODO.md

@@ -29,14 +29,44 @@ Refactor ground rules:
 
 # Next Step
 
-Refactor step 4: method renames, movement/world subsystem
+Refactor step 7: effects dispatch — the giant quaff/readScroll/doZap
-(doMove→moveHero, beTrapped→springTrap, rndmove→randomStep,
+switches become per-kind handler tables of small named methods,
-doRooms/doPassages/doMaze→digRooms/digPassages/digMaze,
+keeping effect order and RNG call sequence identical. This step also
-chgStr→changeStrength, ...); remove the goto/label flows in doMove,
+clears the outstanding cyclop/gocognit/nestif lint findings.
-dispatch, and saveGame in favor of loops and helpers.
 
 # Completed Steps
 
+- 2026-07-07 Refactor step 6 (refactor/god-object-extraction):
+  MessageLine (was MsgLine) owns the msg/addmsg/endmsg machinery,
+  wired to its screen/look/input needs via attach(); RogueGame keeps
+  one-line msg/addmsgf/endmsg shorthands so call sites are unchanged.
+  Player owns pack bookkeeping (nextPackChar, removeFromPack — the
+  state half of leave_pack; leavePack keeps only LastPick tracking).
+  Level owns object/monster list management and lookup (ObjectAt
+  replaces findObj; AddObject/RemoveObject/AddMonster/RemoveMonster
+  replace direct attachObj/detachObj/attachMon/detachMon on level
+  lists). Inventory/pickup UI flows stay on RogueGame deliberately:
+  they are display and turn orchestration, not state surgery.
+
+- 2026-07-07 Refactor step 5 (refactor/item-combat-ui-renames, three
+  commits, one subsystem each): items — getItem→promptPackItem now
+  returning (obj, ok), invName→inventoryName, doPot→applyPotionFuse;
+  combat — rollEm→rollAttacks, attack/moveMonster/chaseStep return
+  (removed bool) instead of C -1/0 int codes; UI —
+  getDir→promptDirection. C breadcrumbs kept; suite green.
+
+- 2026-07-07 Refactor step 4 (refactor/movement-renames): movement/world
+  renames (doMove→moveHero, beTrapped→springTrap, rndmove→randomStep,
+  doRooms/doPassages/doMaze→digRooms/digPassages/digMaze,
+  chgStr→changeStrength, doRun→startRun, moveStuff→finishMove,
+  turnref→turnRefresh, moveMonst→moveMonster, doChase→chaseStep,
+  setOldch→setOldChar, cansee→canSee, roomin→roomIn, runto→runTo,
+  conn→connectRooms, putpass→putPassage, passnum→numberPassages,
+  numpass→numberPassage, rndPos→randomPos, rndRoom→randomRoom,
+  treasRoom→treasureRoom, accntMaze→accountMaze); all goto/label flows
+  replaced with loops (moveHero retry loop + extracted passageTurn,
+  dispatch re-dispatch loop, chaseStep passage loop, saveGame labeled
+  prompt loop); C breadcrumbs kept in doc comments.
 - 2026-07-07 Lint adoption finished (refactor/no-package-globals): all
   37 package-level vars moved into `gameData` (built by `newGameData`,
   hung on RogueGame as `g.data`, set in NewGame and Restore); ObjectKind
@@ -98,41 +128,27 @@ dispatch, and saveGame in favor of loops and helpers.
 
 # Future Steps
 
-1. Refactor step 5: method renames, items/combat/UI subsystems
+1. Refactor step 8: constructor and style pass per the house
-   (invName→inventoryName, rollEm→rollAttacks, doPot→applyPotionFuse,
-   getItem→promptPackItem returning (obj, ok), getDir→promptDirection);
-   int status codes (attack returning -1) become named results. Two or
-   three commits, one subsystem each.
-2. Refactor step 6: extract types from the god object — MessageLine
-   owns the msg/addmsg/endmsg machinery; pack/inventory operations move
-   onto *Player; monster/object list management and map queries
-   consolidate onto *Level; RogueGame keeps turn orchestration and
-   cross-system effects only.
-3. Refactor step 7: effects dispatch — the giant quaff/readScroll/doZap
-   switches become per-kind handler tables of small named methods,
-   keeping effect order and RNG call sequence identical. This step also
-   clears the outstanding cyclop/gocognit/nestif lint findings.
-4. Refactor step 8: constructor and style pass per the house
    styleguide — game.New(game.Params{...}) replacing NewGame(Config);
    replace the gameEnd panic unwind with error-based turn results where
    feasible; 77-column wrap sweep.
-5. Docs refresh: update ARCHITECTURE.md Part 2 and README.md for the
+2. Docs refresh: update ARCHITECTURE.md Part 2 and README.md for the
    post-refactor names; add the C name → Go name rename table.
-6. Playtest hardening pass: play several full games with the tcell
+3. Playtest hardening pass: play several full games with the tcell
    binary and extend run_test.go to script a deeper multi-level
    playthrough (descend past level 5, use potions, scrolls, zapping,
    save/restore). Fix any panics, message mismatches, or divergences
    from the C behavior that this uncovers, with regression tests.
-7. Verify the seed-compatibility claim against the C reference on
+4. Verify the seed-compatibility claim against the C reference on
    c-master: same seed, same dungeon, same item tables, for several
    seeds.
-8. Broaden unit test coverage where playtesting finds thin spots
+5. Broaden unit test coverage where playtesting finds thin spots
    (rings, sticks, wizard commands).
-9. Tag a release once a full game (Amulet retrieval and score entry)
+6. Tag a release once a full game (Amulet retrieval and score entry)
    completes without defects.
-10. Full-terminal-size support (deferred by explicit decision
+7. Full-terminal-size support (deferred by explicit decision
    2026-07-06): per-game dungeon dimensions instead of the 80x24
    constants; open design questions are resize policy, gameplay
    tuning at larger sizes, and a --classic 80x24 mode.
-11. Note: this repo is exempt from the standard policy scaffold. Do not
+8. Note: this repo is exempt from the standard policy scaffold. Do not
    add Makefile, Dockerfile, or REPO_POLICIES.md.

cmd/rogue/main.go

@@ -133,6 +133,6 @@ func chooseSeed(wizard bool) int32 {
 
 	// The C game computed `lowtime + getpid()` in int; the truncation to
 	// 32 bits is the same wraparound the C int arithmetic performed.
-	return int32(time.Now().Unix()&0x7fffffff) + //nolint:gosec // G115: deliberate wrap
+	return int32(time.Now().Unix()&0x7fffffff) +
-		int32(os.Getpid()&0x7fffffff) //nolint:gosec // G115: deliberate wrap
+		int32(os.Getpid()&0x7fffffff)
 }

game/armor.go

@@ -6,8 +6,8 @@ package game
 func (g *RogueGame) wear() {
 	p := &g.Player
 
-	obj := g.getItem("wear", KindArmor)
+	obj, ok := g.promptPackItem("wear", KindArmor)
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -32,7 +32,7 @@ func (g *RogueGame) wear() {
 
 	g.wasteTime()
 	obj.Flags.Set(Known)
-	sp := g.invName(obj, true)
+	sp := g.inventoryName(obj, true)
 	p.CurArmor = obj
 
 	if !g.Options.Terse {
@@ -70,7 +70,7 @@ func (g *RogueGame) takeOff() {
 		g.addmsgf("you used to be")
 	}
 
-	g.msg(" wearing %c) %s", obj.PackCh, g.invName(obj, true))
+	g.msg(" wearing %c) %s", obj.PackCh, g.inventoryName(obj, true))
 }
 
 // wasteTime does nothing but let other things happen (armor.c waste_time).

game/chase.go

@@ -13,12 +13,12 @@ func (g *RogueGame) runners(int) {
 			origPos := tp.Pos
 
 			wastarget := tp.On(Targeted)
-			if g.moveMonst(tp) == -1 {
+			if removed := g.moveMonster(tp); removed {
 				continue
 			}
 
 			if tp.On(Flying) && distCp(g.Player.Pos, tp.Pos) >= 3 {
-				if g.moveMonst(tp) == -1 {
+				if removed := g.moveMonster(tp); removed {
 					continue
 				}
 			}
@@ -37,24 +37,25 @@ func (g *RogueGame) runners(int) {
 	}
 }
 
-// moveMonst executes a single turn of running for a monster (chase.c
+// moveMonster executes a single turn of running for a monster (chase.c
-// move_monst). Returns -1 if the monster died or left the level.
+// move_monst). The result reports that the monster died or left the
-func (g *RogueGame) moveMonst(tp *Monster) int {
+// level (the C -1 return).
+func (g *RogueGame) moveMonster(tp *Monster) bool {
 	if !tp.On(Slowed) || tp.Turn {
-		if g.doChase(tp) == -1 {
+		if g.chaseStep(tp) {
-			return -1
+			return true
 		}
 	}
 
 	if tp.On(Hasted) {
-		if g.doChase(tp) == -1 {
+		if g.chaseStep(tp) {
-			return -1
+			return true
 		}
 	}
 
 	tp.Turn = !tp.Turn
 
-	return 0
+	return false
 }
 
 // relocate makes the monster's new location be the specified one, updating
@@ -62,8 +63,8 @@ func (g *RogueGame) moveMonst(tp *Monster) int {
 func (g *RogueGame) relocate(th *Monster, newLoc Coord) {
 	if newLoc != th.Pos {
 		g.mvaddch(th.Pos.Y, th.Pos.X, th.OldCh)
-		th.Room = g.roomin(newLoc)
+		th.Room = g.roomIn(newLoc)
-		g.setOldch(th, newLoc)
+		g.setOldChar(th, newLoc)
 		oroom := th.Room
 		g.Level.SetMonsterAt(th.Pos.Y, th.Pos.X, nil)
 
@@ -86,9 +87,10 @@ func (g *RogueGame) relocate(th *Monster, newLoc Coord) {
 	}
 }
 
-// doChase makes one thing chase another (chase.c do_chase). Returns -1 if
+// chaseStep makes one thing chase another (chase.c do_chase). removed
-// the chaser died in the attempt.
+// reports that the chaser died or left the level in the attempt (the C
-func (g *RogueGame) doChase(th *Monster) int {
+// -1 return).
+func (g *RogueGame) chaseStep(th *Monster) (removed bool) {
 	p := &g.Player
 	stoprun := false // true means we are there
 	mindist := 32767
@@ -102,16 +104,16 @@ func (g *RogueGame) doChase(th *Monster) int {
 	if th.Dest == &p.Pos {
 		ree = p.Room
 	} else {
-		ree = g.roomin(*th.Dest)
+		ree = g.roomIn(*th.Dest)
 	}
 	// We don't count doors as inside rooms for this routine
 	door := g.Level.Char(th.Pos.Y, th.Pos.X) == Door
 
 	var this Coord
 
-over:
+	for {
-	// If the object of our desire is in a different room, and we are not
+		// If the object of our desire is in a different room, and we are
-	// in a corridor, run to the door nearest to our goal.
+		// not in a corridor, run to the door nearest to our goal.
 		if rer != ree {
 			for i := range rer.Exits {
 				curdist := distCp(*th.Dest, rer.Exits[i])
@@ -125,13 +127,13 @@ over:
 				rer = &g.Level.Passages[*g.Level.FlagsAt(th.Pos.Y, th.Pos.X)&FPassNum]
 				door = false
 
-			goto over
+				continue // the C goto over: redo with the passage as room
 			}
 		} else {
 			this = *th.Dest
-		// For dragons check and see if (a) the hero is on a straight line
+			// For dragons check and see if (a) the hero is on a straight
-		// from it, and (b) that it is within shooting distance, but
+			// line from it, and (b) that it is within shooting distance,
-		// outside of striking range.
+			// but outside of striking range.
 			if th.Type == 'D' && (th.Pos.Y == p.Pos.Y || th.Pos.X == p.Pos.X ||
 				abs(th.Pos.Y-p.Pos.Y) == abs(th.Pos.X-p.Pos.X)) &&
 				distCp(th.Pos, p.Pos) <= BoltLength*BoltLength &&
@@ -153,9 +155,12 @@ over:
 					g.Kamikaze = false
 				}
 
-			return 0
+				return false
 			}
 		}
+
+		break
+	}
 	// This now contains what we want to run to this time so we run to it.
 	// If we hit it we either want to fight it or stop running
 	if !g.chase(th, this) {
@@ -164,7 +169,7 @@ over:
 		} else if this == *th.Dest {
 			for _, obj := range g.Level.Objects {
 				if th.Dest == &obj.Pos {
-					detachObj(&g.Level.Objects, obj)
+					g.Level.RemoveObject(obj)
 					attachObj(&th.Pack, obj)
 
 					if th.Room.Flags.Has(Gone) {
@@ -185,7 +190,7 @@ over:
 		}
 	} else {
 		if th.Type == 'F' {
-			return 0
+			return false
 		}
 	}
 
@@ -195,7 +200,7 @@ over:
 		th.Flags.Clear(Awake)
 	}
 
-	return 0
+	return false
 }
 
 // chase finds the spot for the chaser to move closer to the chasee
@@ -214,7 +219,7 @@ func (g *RogueGame) chase(tp *Monster, ee Coord) bool {
 	if (tp.On(Confused) && g.rnd(5) != 0) || (tp.Type == 'P' && g.rnd(5) == 0) ||
 		(tp.Type == 'B' && g.rnd(2) == 0) {
 		// get a valid random move
-		g.chRet = g.rndmove(&tp.Creature)
+		g.chRet = g.randomStep(&tp.Creature)
 		curdist = distCp(g.chRet, ee)
 		// Small chance that it will become un-confused
 		if g.rnd(20) == 0 {
@@ -294,8 +299,8 @@ func (g *RogueGame) chase(tp *Monster, ee Coord) bool {
 	return curdist != 0 && g.chRet != p.Pos
 }
 
-// setOldch sets the oldch character for the monster (chase.c set_oldch).
+// setOldChar sets the oldch character for the monster (chase.c set_oldch).
-func (g *RogueGame) setOldch(tp *Monster, cp Coord) {
+func (g *RogueGame) setOldChar(tp *Monster, cp Coord) {
 	if tp.Pos == cp {
 		return
 	}
@@ -341,8 +346,8 @@ func (g *RogueGame) seeMonst(mp *Monster) bool {
 	return !mp.Room.Flags.Has(Dark)
 }
 
-// runto sets a monster running after the hero (chase.c runto).
+// runTo sets a monster running after the hero (chase.c runto).
-func (g *RogueGame) runto(runner Coord) {
+func (g *RogueGame) runTo(runner Coord) {
 	tp := g.Level.MonsterAt(runner.Y, runner.X)
 	if tp == nil {
 		return
@@ -353,9 +358,9 @@ func (g *RogueGame) runto(runner Coord) {
 	tp.Dest = g.findDest(tp)
 }
 
-// roomin finds what room some coordinates are in; nil means they aren't in
+// roomIn finds what room some coordinates are in; nil means they aren't in
 // any room (chase.c roomin).
-func (g *RogueGame) roomin(cp Coord) *Room {
+func (g *RogueGame) roomIn(cp Coord) *Room {
 	fp := *g.Level.FlagsAt(cp.Y, cp.X)
 	if fp.Has(FPassage) {
 		return &g.Level.Passages[fp&FPassNum]
@@ -387,9 +392,9 @@ func (g *RogueGame) diagOk(sp, ep Coord) bool {
 	return stepOk(g.Level.Char(ep.Y, sp.X)) && stepOk(g.Level.Char(sp.Y, ep.X))
 }
 
-// cansee returns true if the hero can see a certain coordinate (chase.c
+// canSee returns true if the hero can see a certain coordinate (chase.c
 // cansee).
-func (g *RogueGame) cansee(y, x int) bool {
+func (g *RogueGame) canSee(y, x int) bool {
 	p := &g.Player
 	if p.On(Blind) {
 		return false
@@ -408,7 +413,7 @@ func (g *RogueGame) cansee(y, x int) bool {
 	}
 	// We can only see if the hero is in the same room as the coordinate
 	// and the room is lit, or if it is close.
-	rer := g.roomin(Coord{X: x, Y: y})
+	rer := g.roomIn(Coord{X: x, Y: y})
 
 	return rer == p.Room && !rer.Flags.Has(Dark)
 }
@@ -426,7 +431,7 @@ func (g *RogueGame) findDest(tp *Monster) *Coord {
 			continue
 		}
 
-		if g.roomin(obj.Pos) == tp.Room && g.rnd(100) < prob {
+		if g.roomIn(obj.Pos) == tp.Room && g.rnd(100) < prob {
 			claimed := false
 
 			for _, other := range g.Level.Monsters {

game/command.go

@@ -151,12 +151,12 @@ func (g *RogueGame) command() {
 	}
 }
 
-// dispatch runs one command character (the big switch in command.c,
+// dispatch runs one command character (the big switch in command.c; the
-// including its `goto over` re-dispatch).
+// loop stands in for its `goto over` re-dispatch).
 func (g *RogueGame) dispatch(ch byte) {
 	p := &g.Player
 
-over:
+	for {
 		switch ch {
 		case ',':
 			var found *Object
@@ -189,37 +189,37 @@ over:
 		case '!':
 			g.shell()
 		case 'h':
-		g.doMove(0, -1)
+			g.moveHero(0, -1)
 		case 'j':
-		g.doMove(1, 0)
+			g.moveHero(1, 0)
 		case 'k':
-		g.doMove(-1, 0)
+			g.moveHero(-1, 0)
 		case 'l':
-		g.doMove(0, 1)
+			g.moveHero(0, 1)
 		case 'y':
-		g.doMove(-1, -1)
+			g.moveHero(-1, -1)
 		case 'u':
-		g.doMove(-1, 1)
+			g.moveHero(-1, 1)
 		case 'b':
-		g.doMove(1, -1)
+			g.moveHero(1, -1)
 		case 'n':
-		g.doMove(1, 1)
+			g.moveHero(1, 1)
 		case 'H':
-		g.doRun('h')
+			g.startRun('h')
 		case 'J':
-		g.doRun('j')
+			g.startRun('j')
 		case 'K':
-		g.doRun('k')
+			g.startRun('k')
 		case 'L':
-		g.doRun('l')
+			g.startRun('l')
 		case 'Y':
-		g.doRun('y')
+			g.startRun('y')
 		case 'U':
-		g.doRun('u')
+			g.startRun('u')
 		case 'B':
-		g.doRun('b')
+			g.startRun('b')
 		case 'N':
-		g.doRun('n')
+			g.startRun('n')
 		case CTRL('H'), CTRL('J'), CTRL('K'), CTRL('L'),
 			CTRL('Y'), CTRL('U'), CTRL('B'), CTRL('N'):
 			if !p.On(Blind) {
@@ -234,13 +234,13 @@ over:
 				g.direction = ch
 			}
 
-		goto over
+			continue // the C goto over: re-dispatch as the run command
 		case 'F', 'f':
 			if ch == 'F' {
 				g.Kamikaze = true
 			}
 
-		if !g.getDir() {
+			if !g.promptDirection() {
 				g.After = false
 
 				break
@@ -266,10 +266,10 @@ over:
 				g.RunCh = g.DirCh
 				ch = g.DirCh
 
-			goto over
+				continue // the C goto over: fight by running at it
 			}
 		case 't':
-		if !g.getDir() {
+			if !g.promptDirection() {
 				g.After = false
 			} else {
 				g.missile(g.Delta.Y, g.Delta.X)
@@ -282,7 +282,7 @@ over:
 				ch = g.LastComm
 				g.Again = true
 
-			goto over
+				continue // the C goto over: replay the last command
 			}
 		case 'q':
 			g.quaff()
@@ -334,7 +334,7 @@ over:
 		case 's':
 			g.search()
 		case 'z':
-		if g.getDir() {
+			if g.promptDirection() {
 				g.doZap()
 			} else {
 				g.After = false
@@ -360,7 +360,7 @@ over:
 			g.After = false // "legal" illegal command
 		case '^':
 			g.After = false
-		if g.getDir() {
+			if g.promptDirection() {
 				g.Delta.Y += p.Pos.Y
 				g.Delta.X += p.Pos.X
 
@@ -386,13 +386,13 @@ over:
 			g.Again = false
 		case 'm':
 			g.MoveOn = true
-		if !g.getDir() {
+			if !g.promptDirection() {
 				g.After = false
 			} else {
 				ch = g.DirCh
 				g.countCh = g.DirCh
 
-			goto over
+				continue // the C goto over: move onto it without pickup
 			}
 		case ')':
 			g.current(p.CurWeapon, "wielding", "")
@@ -416,6 +416,9 @@ over:
 				g.illcom(ch)
 			}
 		}
+
+		return
+	}
 }
 
 // wizardCommand handles the MASTER debug commands (command.c).
@@ -450,7 +453,7 @@ func (g *RogueGame) wizardCommand(ch byte) {
 	case CTRL('X'):
 		g.turnSee(p.On(SenseMonsters))
 	case CTRL('~'):
-		if item := g.getItem("charge", KindWand); item != nil {
+		if item, ok := g.promptPackItem("charge", KindWand); ok {
 			item.Charges = 10000
 		}
 	case CTRL('I'):
@@ -735,9 +738,9 @@ func (g *RogueGame) levitCheck() bool {
 // call allows a user to call a potion, scroll, or ring something
 // (command.c call).
 func (g *RogueGame) call() {
-	obj := g.getItem("call", KindCallable)
+	obj, ok := g.promptPackItem("call", KindCallable)
 	// Make certain that it is something that we want to name
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -817,7 +820,7 @@ func (g *RogueGame) current(cur *Object, how, where string) {
 		}
 
 		g.InvDescribe = false
-		g.addmsgf("%c) %s", cur.PackCh, g.invName(cur, true))
+		g.addmsgf("%c) %s", cur.PackCh, g.inventoryName(cur, true))
 
 		g.InvDescribe = true
 		if where != "" {

game/creature.go

@@ -50,6 +50,47 @@ func (p *Player) IsWearing(ring RingKind) bool {
 	return p.IsRing(Left, ring) || p.IsRing(Right, ring)
 }
 
+// nextPackChar claims and returns the next unused pack character (pack.c
+// pack_char).
+func (p *Player) nextPackChar() byte {
+	for i := range p.PackUsed {
+		if !p.PackUsed[i] {
+			p.PackUsed[i] = true
+
+			return byte(i) + 'a'
+		}
+	}
+
+	return byte(len(p.PackUsed)) + 'a' // C would walk off the array here
+}
+
+// removeFromPack takes an item out of the pack: the whole entry, or one
+// of a stack when all is false (the bookkeeping half of pack.c
+// leave_pack). It returns the object that left the pack — a copy when
+// newobj asks for a split.
+func (p *Player) removeFromPack(obj *Object, newobj, all bool) *Object {
+	p.Inpack--
+
+	nobj := obj
+	if obj.Count > 1 && !all {
+		obj.Count--
+		if obj.Group != 0 {
+			p.Inpack++
+		}
+
+		if newobj {
+			copied := *obj
+			nobj = &copied
+			nobj.Count = 1
+		}
+	} else {
+		p.PackUsed[obj.PackCh-'a'] = false
+		detachObj(&p.Pack, obj)
+	}
+
+	return nobj
+}
+
 // attachMon pushes a monster onto the front of a list (list.c attach).
 func attachMon(list *[]*Monster, item *Monster) {
 	*list = append([]*Monster{item}, *list...)

game/daemons.go

@@ -212,7 +212,7 @@ func (g *RogueGame) comeDown(int) {
 
 	// undo the things
 	for _, tp := range g.Level.Objects {
-		if g.cansee(tp.Pos.Y, tp.Pos.X) {
+		if g.canSee(tp.Pos.Y, tp.Pos.X) {
 			g.mvaddch(tp.Pos.Y, tp.Pos.X, tp.Kind.Glyph())
 		}
 	}
@@ -223,7 +223,7 @@ func (g *RogueGame) comeDown(int) {
 	for _, tp := range g.Level.Monsters {
 		g.move(tp.Pos.Y, tp.Pos.X)
 
-		if g.cansee(tp.Pos.Y, tp.Pos.X) {
+		if g.canSee(tp.Pos.Y, tp.Pos.X) {
 			if !tp.On(Invisible) || p.On(CanSeeInvisible) {
 				g.addch(tp.Disguise)
 			} else {
@@ -248,13 +248,13 @@ func (g *RogueGame) visuals(int) {
 	}
 	// change the things
 	for _, tp := range g.Level.Objects {
-		if g.cansee(tp.Pos.Y, tp.Pos.X) {
+		if g.canSee(tp.Pos.Y, tp.Pos.X) {
 			g.mvaddch(tp.Pos.Y, tp.Pos.X, g.rndThing())
 		}
 	}
 
 	// change the stairs
-	if !g.SeenStairs && g.cansee(g.Level.Stairs.Y, g.Level.Stairs.X) {
+	if !g.SeenStairs && g.canSee(g.Level.Stairs.Y, g.Level.Stairs.X) {
 		g.mvaddch(g.Level.Stairs.Y, g.Level.Stairs.X, g.rndThing())
 	}
 

game/effects_test.go

@@ -10,7 +10,7 @@ func mkGameInput(t *testing.T) *RogueGame {
 	g := NewGame(Config{Seed: 5, Term: &testTerm{}})
 	g.NewLevel()
 	g.Oldpos = g.Player.Pos
-	g.Oldrp = g.roomin(g.Player.Pos)
+	g.Oldrp = g.roomIn(g.Player.Pos)
 
 	return g
 }

game/fight.go

@@ -47,7 +47,7 @@ func (g *RogueGame) fight(mp Coord, weap *Object, thrown bool) bool {
 	// place.
 	g.Count = 0
 	g.Quiet = 0
-	g.runto(mp)
+	g.runTo(mp)
 	// Let him know it was really a xeroc (if it was one).
 	if tp.Type == 'X' && tp.Disguise != 'X' && !p.On(Blind) {
 		tp.Disguise = 'X'
@@ -67,7 +67,7 @@ func (g *RogueGame) fight(mp Coord, weap *Object, thrown bool) bool {
 	didHit := false
 
 	g.HasHit = g.Options.Terse && !g.ToDeath
-	if g.rollEm(&p.Creature, &tp.Creature, weap, thrown) {
+	if g.rollAttacks(&p.Creature, &tp.Creature, weap, thrown) {
 		didHit = false
 
 		if thrown {
@@ -104,9 +104,10 @@ func (g *RogueGame) fight(mp Coord, weap *Object, thrown bool) bool {
 	return didHit
 }
 
-// attack has the monster attack the player (fight.c attack). Returns -1 if
+// attack has the monster attack the player (fight.c attack). removed
-// the monster removed itself from the level during its own attack.
+// reports that the monster took itself off the level during its own
-func (g *RogueGame) attack(mp *Monster) int {
+// attack (the C -1 return).
+func (g *RogueGame) attack(mp *Monster) (removed bool) {
 	p := &g.Player
 	// Since this is an attack, stop running and any healing that was
 	// going on at the time.
@@ -128,9 +129,8 @@ func (g *RogueGame) attack(mp *Monster) int {
 
 	mname := g.setMname(mp)
 	oldhp := p.Stats.HP
-	removed := false
 
-	if g.rollEm(&mp.Creature, &p.Creature, nil, false) {
+	if g.rollAttacks(&mp.Creature, &p.Creature, nil, false) {
 		if mp.Type != 'I' {
 			if g.HasHit {
 				g.addmsgf(".  ")
@@ -182,7 +182,7 @@ func (g *RogueGame) attack(mp *Monster) int {
 				// Rattlesnakes have poisonous bites
 				if !g.save(VsPoison) {
 					if !p.IsWearing(RingSustainStrength) {
-						g.chgStr(-1)
+						g.changeStrength(-1)
 
 						if !g.Options.Terse {
 							g.msg("you feel a bite in your leg and now feel weaker")
@@ -290,7 +290,7 @@ func (g *RogueGame) attack(mp *Monster) int {
 					removed = true
 
 					g.leavePack(steal, false, false)
-					g.msg("she stole %s!", g.invName(steal, true))
+					g.msg("she stole %s!", g.inventoryName(steal, true))
 				}
 			}
 		}
@@ -317,11 +317,7 @@ func (g *RogueGame) attack(mp *Monster) int {
 	g.Count = 0
 	g.status()
 
-	if removed {
+	return removed
-		return -1
-	}
-
-	return 0
 }
 
 // swing returns true if the swing hits (fight.c swing).
@@ -332,8 +328,8 @@ func (g *RogueGame) swing(atLvl, opArm, wplus int) bool {
 	return res+wplus >= need
 }
 
-// rollEm rolls several attacks (fight.c roll_em).
+// rollAttacks rolls several attacks (fight.c roll_em).
-func (g *RogueGame) rollEm(thatt, thdef *Creature, weap *Object, hurl bool) bool {
+func (g *RogueGame) rollAttacks(thatt, thdef *Creature, weap *Object, hurl bool) bool {
 	p := &g.Player
 	att := &thatt.Stats
 	def := &thdef.Stats
@@ -553,7 +549,7 @@ func (g *RogueGame) removeMon(mp Coord, tp *Monster, waskill bool) {
 
 	g.Level.SetMonsterAt(mp.Y, mp.X, nil)
 	g.mvaddch(mp.Y, mp.X, tp.OldCh)
-	detachMon(&g.Level.Monsters, tp)
+	g.Level.RemoveMonster(tp)
 
 	if tp.On(Targeted) {
 		g.Kamikaze = false

game/fight_test.go

@@ -10,7 +10,7 @@ func mkGame(t *testing.T, seed int32) *RogueGame {
 	g := NewGame(Config{Seed: seed, Term: &testTerm{}})
 	g.NewLevel()
 	g.Oldpos = g.Player.Pos
-	g.Oldrp = g.roomin(g.Player.Pos)
+	g.Oldrp = g.roomIn(g.Player.Pos)
 
 	return g
 }
@@ -32,7 +32,7 @@ func TestRollEmParsesMultiAttackDice(t *testing.T) {
 	// With attacker level 20 vs armor 10, swing always hits
 	// (rnd(20)+wplus >= (20-20)-10 is always true), so three attacks of
 	// 1x4 + str bonus 1 each must deal between 6 and 15 damage.
-	if !g.rollEm(att, def, nil, false) {
+	if !g.rollAttacks(att, def, nil, false) {
 		t.Fatal("attack with guaranteed swing missed")
 	}
 

game/game.go

@@ -110,7 +110,7 @@ type RogueGame struct {
 
 	// screen / messages
 	scr         *Screen
-	Msgs        MsgLine
+	Msgs        MessageLine
 	statusCache statusCache
 	invPage     invPage // things.c discovery-list pagination statics
 
@@ -169,6 +169,7 @@ func NewGame(cfg Config) *RogueGame {
 	g.InvDescribe = true
 	g.Msgs.SaveMsg = true
 	g.scr = NewScreen(cfg.Term)
+	g.Msgs.attach(g.scr, g.look, g.readchar)
 	g.FileName = cfg.Home + "/rogue.save"
 
 	g.rogueOpts = cfg.RogueOpts
@@ -242,7 +243,7 @@ func (g *RogueGame) playit() {
 
 	g.Oldpos = g.Player.Pos
 
-	g.Oldrp = g.roomin(g.Player.Pos)
+	g.Oldrp = g.roomIn(g.Player.Pos)
 	for g.Playing {
 		g.command() // command execution
 	}

game/io.go

@@ -10,9 +10,11 @@ import (
 // maxMsg is io.c MAXMSG: how much message fits before --More--.
 const maxMsg = NumCols - len("--More--") - 1
 
-// MsgLine is the io.c message machinery: the static msgbuf/newpos pair plus
+// MessageLine is the io.c message machinery: the static msgbuf/newpos
-// the related globals (mpos, huh, and the message-behavior flags).
+// pair plus the related globals (mpos, huh, and the message-behavior
-type MsgLine struct {
+// flags). It owns the top line of the screen; attach wires in the
+// display and input it needs.
+type MessageLine struct {
 	buf      strings.Builder // msgbuf
 	newpos   int
 	Mpos     int    // where cursor is on top line
@@ -20,49 +22,52 @@ type MsgLine struct {
 	SaveMsg  bool   // remember last msg
 	LowerMsg bool   // messages should start w/lower case
 	MsgEsc   bool   // check for ESC from msg's --More--
+
+	scr      *Screen           // the top line lives on scr.Std
+	look     func(wakeup bool) // redraw before a --More-- (misc.c look)
+	readChar func() byte       // input for --More-- prompts
 }
 
 // Msg displays a message at the top of the screen (io.c msg). It returns
-// Escape if the player escaped out of a --More--, ^Escape otherwise (the C
+// Escape if the player escaped out of a --More--, ^Escape otherwise (the
-// convention: callers compare against ESCAPE).
+// C convention: callers compare against ESCAPE).
-func (g *RogueGame) msg(format string, a ...any) int {
+func (m *MessageLine) Msg(format string, a ...any) int {
 	// if the string is "", just clear the line
 	if format == "" {
-		g.move(0, 0)
+		m.scr.Std.Move(0, 0)
-		g.clrtoeol()
+		m.scr.Std.Clrtoeol()
-		g.Msgs.Mpos = 0
+		m.Mpos = 0
 
 		return ^Escape
 	}
 	// otherwise add to the message and flush it out
-	g.doaddf(format, a...)
+	m.doaddf(format, a...)
 
-	return g.endmsg()
+	return m.End()
 }
 
-// addmsgf adds things to the current message (io.c addmsg).
+// Addf adds things to the current message (io.c addmsg).
-func (g *RogueGame) addmsgf(format string, a ...any) {
+func (m *MessageLine) Addf(format string, a ...any) {
-	g.doaddf(format, a...)
+	m.doaddf(format, a...)
 }
 
-// endmsg displays a new msg, giving the player a chance to see the previous
+// End displays a new msg, giving the player a chance to see the previous
 // one if it is up there with the --More-- (io.c endmsg).
-func (g *RogueGame) endmsg() int {
+func (m *MessageLine) End() int {
-	m := &g.Msgs
 	if m.SaveMsg {
 		m.Huh = m.buf.String()
 	}
 
 	if m.Mpos != 0 {
-		g.look(false)
+		m.look(false)
-		g.mvaddstr(0, m.Mpos, "--More--")
+		m.scr.Std.MvAddStr(0, m.Mpos, "--More--")
-		g.refresh()
+		m.scr.Refresh()
 
 		if !m.MsgEsc {
-			g.waitFor(' ')
+			m.waitForSpace()
 		} else {
 			for {
-				ch := g.readchar()
+				ch := m.readChar()
 				if ch == ' ' {
 					break
 				}
@@ -85,30 +90,60 @@ func (g *RogueGame) endmsg() int {
 		out = string(toUpper(out[0])) + out[1:]
 	}
 
-	g.mvaddstr(0, 0, out)
+	m.scr.Std.MvAddStr(0, 0, out)
-	g.clrtoeol()
+	m.scr.Std.Clrtoeol()
 
 	m.Mpos = m.newpos
 	m.newpos = 0
 	m.buf.Reset()
-	g.refresh()
+	m.scr.Refresh()
 
 	return ^Escape
 }
 
-// doaddf performs an add onto the message buffer (io.c doadd).
+// attach wires the message line to its display and input; NewGame and
-func (g *RogueGame) doaddf(format string, a ...any) {
+// Restore call it once the screen and game exist.
-	m := &g.Msgs
+func (m *MessageLine) attach(scr *Screen, look func(bool), readChar func() byte) {
+	m.scr = scr
+	m.look = look
+	m.readChar = readChar
+}
 
+// waitForSpace absorbs input until the player types a space: the
+// --More-- acknowledgement (io.c wait_for).
+func (m *MessageLine) waitForSpace() {
+	for {
+		if m.readChar() == ' ' {
+			return
+		}
+	}
+}
+
+// doaddf performs an add onto the message buffer (io.c doadd).
+func (m *MessageLine) doaddf(format string, a ...any) {
 	s := fmt.Sprintf(format, a...)
 	if len(s)+m.newpos >= maxMsg {
-		g.endmsg()
+		m.End()
 	}
 
 	m.buf.WriteString(s)
 	m.newpos = m.buf.Len()
 }
 
+// msg, addmsgf, and endmsg are the game-side shorthands for the message
+// line; the machinery lives on MessageLine.
+func (g *RogueGame) msg(format string, a ...any) int {
+	return g.Msgs.Msg(format, a...)
+}
+
+func (g *RogueGame) addmsgf(format string, a ...any) {
+	g.Msgs.Addf(format, a...)
+}
+
+func (g *RogueGame) endmsg() {
+	g.Msgs.End()
+}
+
 // stepOk returns true if it is ok to step on ch (io.c step_ok).
 func stepOk(ch byte) bool {
 	switch ch {

game/level.go

@@ -51,6 +51,29 @@ func (l *Level) VisibleChar(y, x int) byte {
 	return l.Char(y, x)
 }
 
+// ObjectAt finds the unclaimed object at (y, x) (misc.c find_obj).
+func (l *Level) ObjectAt(y, x int) *Object {
+	for _, obj := range l.Objects {
+		if obj.Pos.Y == y && obj.Pos.X == x {
+			return obj
+		}
+	}
+
+	return nil
+}
+
+// AddObject puts an object on the level (list.c attach on lvl_obj).
+func (l *Level) AddObject(obj *Object) { attachObj(&l.Objects, obj) }
+
+// RemoveObject takes an object off the level (list.c detach on lvl_obj).
+func (l *Level) RemoveObject(obj *Object) { detachObj(&l.Objects, obj) }
+
+// AddMonster puts a monster on the level (list.c attach on mlist).
+func (l *Level) AddMonster(m *Monster) { attachMon(&l.Monsters, m) }
+
+// RemoveMonster takes a monster off the level (list.c detach on mlist).
+func (l *Level) RemoveMonster(m *Monster) { detachMon(&l.Monsters, m) }
+
 // goldCalc is the GOLDCALC macro: how much a gold pile is worth at depth.
 func (g *RogueGame) goldCalc() int {
 	return g.rnd(50+10*g.Depth) + 2

game/misc.go

@@ -223,21 +223,10 @@ func (g *RogueGame) showFloor() bool {
 	return true
 }
 
-// findObj finds the unclaimed object at (y, x) (misc.c find_obj).
-func (g *RogueGame) findObj(y, x int) *Object {
-	for _, obj := range g.Level.Objects {
-		if obj.Pos.Y == y && obj.Pos.X == x {
-			return obj
-		}
-	}
-
-	return nil
-}
-
 // eat lets her try to eat something (misc.c eat).
 func (g *RogueGame) eat() {
-	obj := g.getItem("eat", KindFood)
+	obj, ok := g.promptPackItem("eat", KindFood)
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -305,9 +294,9 @@ func (g *RogueGame) checkLevel() {
 	}
 }
 
-// chgStr modifies the player's strength, keeping track of the highest it
+// changeStrength modifies the player's strength, keeping track of the
-// has been (misc.c chg_str).
+// highest it has been (misc.c chg_str).
-func (g *RogueGame) chgStr(amt int) {
+func (g *RogueGame) changeStrength(amt int) {
 	if amt == 0 {
 		return
 	}
@@ -362,10 +351,10 @@ func (g *RogueGame) addHaste(potion bool) bool {
 
 // aggravate aggravates all the monsters on this level (misc.c aggravate).
 func (g *RogueGame) aggravate() {
-	// runto() can splice the monster list while we walk it, so iterate a copy.
+	// runTo() can splice the monster list while we walk it, so iterate a copy.
 	monsters := append([]*Monster(nil), g.Level.Monsters...)
 	for _, mp := range monsters {
-		g.runto(mp.Pos)
+		g.runTo(mp.Pos)
 	}
 }
 
@@ -406,9 +395,9 @@ func (g *RogueGame) isCurrent(obj *Object) bool {
 	return false
 }
 
-// getDir sets up the direction coordinate for use in various "prefix"
+// promptDirection sets up the direction coordinate for use in various
-// commands (misc.c get_dir).
+// "prefix" commands (misc.c get_dir).
-func (g *RogueGame) getDir() bool {
+func (g *RogueGame) promptDirection() bool {
 	if g.Again && g.LastDir != 0 {
 		g.Delta = g.lastDelt
 		g.DirCh = g.LastDir

game/monsters.go

@@ -31,13 +31,13 @@ func (g *RogueGame) randMonster(wander bool) byte {
 func (g *RogueGame) newMonster(tp *Monster, typ byte, cp Coord) {
 	levAdd := max(g.Depth-AmuletLevel, 0)
 
-	attachMon(&g.Level.Monsters, tp)
+	g.Level.AddMonster(tp)
 	tp.Type = typ
 	tp.Disguise = typ
 	tp.Pos = cp
 	g.move(cp.Y, cp.X)
 	tp.OldCh = g.inch()
-	tp.Room = g.roomin(cp)
+	tp.Room = g.roomIn(cp)
 	g.Level.SetMonsterAt(cp.Y, cp.X, tp)
 	mp := &g.Monsters[tp.Type-'A']
 	tp.Stats.Lvl = mp.Stats.Lvl + levAdd
@@ -57,7 +57,7 @@ func (g *RogueGame) newMonster(tp *Monster, typ byte, cp Coord) {
 	tp.Pack = nil
 
 	if g.Player.IsWearing(RingAggravateMonsters) {
-		g.runto(cp)
+		g.runTo(cp)
 	}
 
 	if typ == 'X' {
@@ -92,7 +92,7 @@ func (g *RogueGame) wanderer() {
 	var cp Coord
 	for {
 		cp, _ = g.findFloor(true)
-		if g.roomin(cp) != g.Player.Room {
+		if g.roomIn(cp) != g.Player.Room {
 			break
 		}
 	}
@@ -111,7 +111,7 @@ func (g *RogueGame) wanderer() {
 		g.standend()
 	}
 
-	g.runto(tp.Pos)
+	g.runTo(tp.Pos)
 }
 
 // wakeMonster is what to do when the hero steps next to a monster

game/move.go

@@ -2,16 +2,17 @@ package game
 
 // move.c — hero movement commands.
 
-// doRun starts the hero running (move.c do_run).
+// startRun starts the hero running (move.c do_run).
-func (g *RogueGame) doRun(ch byte) {
+func (g *RogueGame) startRun(ch byte) {
 	g.Running = true
 	g.After = false
 	g.RunCh = ch
 }
 
-// doMove checks that a move is legal and handles the consequences —
+// moveHero checks that a move is legal and handles the consequences —
-// fighting, picking up, etc. (move.c do_move).
+// fighting, picking up, etc. (move.c do_move). The C `goto over`
-func (g *RogueGame) doMove(dy, dx int) {
+// re-check after a passage turn is the retry loop.
+func (g *RogueGame) moveHero(dy, dx int) {
 	p := &g.Player
 
 	g.Firstmove = false
@@ -24,7 +25,7 @@ func (g *RogueGame) doMove(dy, dx int) {
 	// Do a confused move (maybe)
 	var nh Coord
 	if p.On(Confused) && g.rnd(5) != 0 {
-		nh = g.rndmove(&p.Creature)
+		nh = g.randomStep(&p.Creature)
 		if nh == p.Pos {
 			g.After = false
 			g.Running = false
@@ -36,9 +37,9 @@ func (g *RogueGame) doMove(dy, dx int) {
 		nh = Coord{Y: p.Pos.Y + dy, X: p.Pos.X + dx}
 	}
 
-over:
+	for {
-	// Check if he tried to move off the screen or make an illegal diagonal
+		// Check if he tried to move off the screen or make an illegal
-	// move, and stop him if he did.
+		// diagonal move, and stop him if he did.
 		hitBound := nh.X < 0 || nh.X >= NumCols || nh.Y <= 0 || nh.Y >= NumLines-1
 
 		var (
@@ -81,8 +82,76 @@ over:
 
 		switch ch {
 		case ' ', '|', '-':
-		if g.Options.PassGo && g.Running && p.Room.Flags.Has(Gone) &&
+			if turn, ndy, ndx := g.passageTurn(dy, dx); turn {
-			!p.On(Blind) {
+				dy, dx = ndy, ndx
+
+				g.turnRefresh()
+
+				nh = Coord{Y: p.Pos.Y + dy, X: p.Pos.X + dx}
+
+				continue // the C goto over: re-check the turned move
+			}
+
+			g.Running = false
+			g.After = false
+		case Door:
+			g.Running = false
+			if g.Level.FlagsAt(p.Pos.Y, p.Pos.X).Has(FPassage) {
+				g.enterRoom(nh)
+			}
+
+			g.finishMove(nh, fl)
+		case Trap:
+			tr := g.springTrap(nh)
+			if tr == TrapDoor || tr == TrapTeleport {
+				return
+			}
+
+			g.finishMove(nh, fl)
+		case Passage:
+			// when you're in a corridor, you don't know if you're in a maze
+			// room or not, and there ain't no way to find out if you're
+			// leaving a maze room, so it is necessary to always recalculate
+			// proom.
+			p.Room = g.roomIn(p.Pos)
+			g.finishMove(nh, fl)
+		case Floor:
+			if !fl.Has(FReal) {
+				g.springTrap(p.Pos)
+			}
+
+			g.finishMove(nh, fl)
+		default:
+			if ch == Stairs {
+				g.SeenStairs = true
+			}
+
+			g.Running = false
+			if isUpper(ch) || g.Level.MonsterAt(nh.Y, nh.X) != nil {
+				g.fight(nh, p.CurWeapon, false)
+			} else {
+				if ch != Stairs {
+					g.Take = ch
+				}
+
+				g.finishMove(nh, fl)
+			}
+		}
+
+		return
+	}
+}
+
+// passageTurn checks whether a runner in a gone-room passage should turn
+// the corner instead of stopping at a wall (the PASSGO block of move.c
+// do_move). It reports whether to turn and the new deltas, updating RunCh.
+func (g *RogueGame) passageTurn(dy, dx int) (bool, int, int) {
+	p := &g.Player
+	if !g.Options.PassGo || !g.Running || !p.Room.Flags.Has(Gone) ||
+		p.On(Blind) {
+		return false, dy, dx
+	}
+
 	var b1, b2 bool
 
 	switch g.RunCh {
@@ -99,13 +168,7 @@ over:
 				dy = 1
 			}
 
-					dx = 0
+			return true, dy, 0
-
-					g.turnref()
-
-					nh = Coord{Y: p.Pos.Y + dy, X: p.Pos.X + dx}
-
-					goto over
 		}
 	case 'j', 'k':
 		b1 = p.Pos.X != 0 && g.turnOk(p.Pos.Y, p.Pos.X-1)
@@ -120,66 +183,15 @@ over:
 				dx = 1
 			}
 
-					dy = 0
+			return true, 0, dx
-
-					g.turnref()
-
-					nh = Coord{Y: p.Pos.Y + dy, X: p.Pos.X + dx}
-
-					goto over
-				}
 		}
 	}
 
-		g.Running = false
+	return false, dy, dx
-		g.After = false
-	case Door:
-		g.Running = false
-		if g.Level.FlagsAt(p.Pos.Y, p.Pos.X).Has(FPassage) {
-			g.enterRoom(nh)
 }
 
-		g.moveStuff(nh, fl)
+// finishMove is the move_stuff label in do_move: complete the step.
-	case Trap:
+func (g *RogueGame) finishMove(nh Coord, fl PlaceFlags) {
-		tr := g.beTrapped(nh)
-		if tr == TrapDoor || tr == TrapTeleport {
-			return
-		}
-
-		g.moveStuff(nh, fl)
-	case Passage:
-		// when you're in a corridor, you don't know if you're in a maze
-		// room or not, and there ain't no way to find out if you're
-		// leaving a maze room, so it is necessary to always recalculate
-		// proom.
-		p.Room = g.roomin(p.Pos)
-		g.moveStuff(nh, fl)
-	case Floor:
-		if !fl.Has(FReal) {
-			g.beTrapped(p.Pos)
-		}
-
-		g.moveStuff(nh, fl)
-	default:
-		if ch == Stairs {
-			g.SeenStairs = true
-		}
-
-		g.Running = false
-		if isUpper(ch) || g.Level.MonsterAt(nh.Y, nh.X) != nil {
-			g.fight(nh, p.CurWeapon, false)
-		} else {
-			if ch != Stairs {
-				g.Take = ch
-			}
-
-			g.moveStuff(nh, fl)
-		}
-	}
-}
-
-// moveStuff is the move_stuff label in do_move: complete the step.
-func (g *RogueGame) moveStuff(nh Coord, fl PlaceFlags) {
 	p := &g.Player
 	g.mvaddch(p.Pos.Y, p.Pos.X, g.floorAt())
 
@@ -198,8 +210,9 @@ func (g *RogueGame) turnOk(y, x int) bool {
 	return pp.Ch == Door || pp.Flags&(FReal|FPassage) == (FReal|FPassage)
 }
 
-// turnref decides whether to refresh at a passage turning (move.c turnref).
+// turnRefresh decides whether to refresh at a passage turning (move.c
-func (g *RogueGame) turnref() {
+// turnref).
+func (g *RogueGame) turnRefresh() {
 	p := &g.Player
 
 	pp := g.Level.At(p.Pos.Y, p.Pos.X)
@@ -228,8 +241,8 @@ func (g *RogueGame) doorOpen(rp *Room) {
 	}
 }
 
-// beTrapped makes him pay for stepping on a trap (move.c be_trapped).
+// springTrap makes him pay for stepping on a trap (move.c be_trapped).
-func (g *RogueGame) beTrapped(tc Coord) TrapKind {
+func (g *RogueGame) springTrap(tc Coord) TrapKind {
 	p := &g.Player
 	if p.On(Levitating) {
 		return TrapRust // anything that's not a door or teleport
@@ -313,7 +326,7 @@ func (g *RogueGame) beTrapped(tc Coord) TrapKind {
 			}
 
 			if !p.IsWearing(RingSustainStrength) && !g.save(VsPoison) {
-				g.chgStr(-1)
+				g.changeStrength(-1)
 			}
 
 			g.msg("a small dart just hit you in the shoulder")
@@ -328,9 +341,9 @@ func (g *RogueGame) beTrapped(tc Coord) TrapKind {
 	return tr
 }
 
-// rndmove moves in a random direction if the monster/person is confused
+// randomStep moves in a random direction if the monster/person is
-// (move.c rndmove).
+// confused (move.c rndmove).
-func (g *RogueGame) rndmove(who *Creature) Coord {
+func (g *RogueGame) randomStep(who *Creature) Coord {
 	ret := Coord{
 		Y: who.Pos.Y + g.rnd(3) - 1,
 		X: who.Pos.X + g.rnd(3) - 1,

game/newlevel.go

@@ -27,8 +27,8 @@ func (g *RogueGame) NewLevel() {
 	// go with them (the garbage collector is our free_list).
 	g.Level.Monsters = nil
 	g.Level.Objects = nil
-	g.doRooms()    // Draw rooms
+	g.digRooms()    // Draw rooms
-	g.doPassages() // Draw passages
+	g.digPassages() // Draw passages
 
 	p.NoFood++
 
@@ -61,7 +61,7 @@ func (g *RogueGame) NewLevel() {
 	g.SeenStairs = false
 
 	for _, tp := range g.Level.Monsters {
-		tp.Room = g.roomin(tp.Pos)
+		tp.Room = g.roomIn(tp.Pos)
 	}
 
 	hero, _ := g.findFloor(true)
@@ -78,8 +78,8 @@ func (g *RogueGame) NewLevel() {
 	}
 }
 
-// rndRoom picks a room that is really there (new_level.c rnd_room).
+// randomRoom picks a room that is really there (new_level.c rnd_room).
-func (g *RogueGame) rndRoom() int {
+func (g *RogueGame) randomRoom() int {
 	for {
 		rm := g.rnd(MaxRooms)
 		if !g.Level.Rooms[rm].Flags.Has(Gone) {
@@ -98,14 +98,14 @@ func (g *RogueGame) putThings() {
 	}
 	// check for treasure rooms, and if so, put it in.
 	if g.rnd(treasRoomChance) == 0 {
-		g.treasRoom()
+		g.treasureRoom()
 	}
 	// Do MAXOBJ attempts to put things on a level
 	for range MaxObj {
 		if g.rnd(100) < 36 {
 			// Pick a new object and link it in the list
 			obj := g.newThing()
-			attachObj(&g.Level.Objects, obj)
+			g.Level.AddObject(obj)
 			// Put it somewhere
 			obj.Pos, _ = g.findFloor(false)
 			g.Level.SetChar(obj.Pos.Y, obj.Pos.X, obj.Kind.Glyph())
@@ -115,7 +115,7 @@ func (g *RogueGame) putThings() {
 	// yet, put it somewhere on the ground
 	if g.Depth >= AmuletLevel && !g.HasAmulet {
 		obj := newObject()
-		attachObj(&g.Level.Objects, obj)
+		g.Level.AddObject(obj)
 		obj.Damage = dice("0x0")
 		obj.HurlDmg = dice("0x0")
 		obj.ArmorClass = 11
@@ -126,9 +126,9 @@ func (g *RogueGame) putThings() {
 	}
 }
 
-// treasRoom adds a treasure room (new_level.c treas_room).
+// treasureRoom adds a treasure room (new_level.c treas_room).
-func (g *RogueGame) treasRoom() {
+func (g *RogueGame) treasureRoom() {
-	rp := &g.Level.Rooms[g.rndRoom()]
+	rp := &g.Level.Rooms[g.randomRoom()]
 
 	spots := min((rp.Max.Y-2)*(rp.Max.X-2)-minTreas, maxTreas-minTreas)
 
@@ -137,7 +137,7 @@ func (g *RogueGame) treasRoom() {
 		mp, _ := g.findFloorIn(rp, 2*maxTries, false)
 		tp := g.newThing()
 		tp.Pos = mp
-		attachObj(&g.Level.Objects, tp)
+		g.Level.AddObject(tp)
 		g.Level.SetChar(mp.Y, mp.X, tp.Kind.Glyph())
 	}
 

game/pack.go

@@ -9,7 +9,7 @@ func (g *RogueGame) addPack(obj *Object, silent bool) {
 	fromFloor := false
 
 	if obj == nil {
-		if obj = g.findObj(p.Pos.Y, p.Pos.X); obj == nil {
+		if obj = g.Level.ObjectAt(p.Pos.Y, p.Pos.X); obj == nil {
 			return
 		}
 
@@ -18,7 +18,7 @@ func (g *RogueGame) addPack(obj *Object, silent bool) {
 
 	// Check for and deal with scare monster scrolls
 	if obj.Kind == KindScroll && obj.ScrollKind() == ScrollScareMonster && obj.Flags.Has(WasFound) {
-		detachObj(&g.Level.Objects, obj)
+		g.Level.RemoveObject(obj)
 		g.mvaddch(p.Pos.Y, p.Pos.X, g.floorCh())
 
 		if p.Room.Flags.Has(Gone) {
@@ -34,7 +34,7 @@ func (g *RogueGame) addPack(obj *Object, silent bool) {
 
 	if len(p.Pack) == 0 {
 		p.Pack = append(p.Pack, obj)
-		obj.PackCh = g.packChar()
+		obj.PackCh = p.nextPackChar()
 		p.Inpack++
 	} else {
 		// Walk the pack looking for the insertion point, keeping items of
@@ -112,7 +112,7 @@ func (g *RogueGame) addPack(obj *Object, silent bool) {
 				return
 			}
 
-			obj.PackCh = g.packChar()
+			obj.PackCh = p.nextPackChar()
 			p.Pack = append(p.Pack[:lp+1],
 				append([]*Object{obj}, p.Pack[lp+1:]...)...)
 		}
@@ -137,7 +137,7 @@ func (g *RogueGame) addPack(obj *Object, silent bool) {
 			g.addmsgf("you now have ")
 		}
 
-		g.msg("%s (%c)", g.invName(obj, !g.Options.Terse), obj.PackCh)
+		g.msg("%s (%c)", g.inventoryName(obj, !g.Options.Terse), obj.PackCh)
 	}
 }
 
@@ -168,7 +168,7 @@ func (g *RogueGame) packRoom(fromFloor bool, obj *Object) bool {
 	}
 
 	if fromFloor {
-		detachObj(&g.Level.Objects, obj)
+		g.Level.RemoveObject(obj)
 		g.mvaddch(p.Pos.Y, p.Pos.X, g.floorCh())
 
 		if p.Room.Flags.Has(Gone) {
@@ -181,46 +181,17 @@ func (g *RogueGame) packRoom(fromFloor bool, obj *Object) bool {
 	return true
 }
 
-// leavePack takes an item out of the pack (pack.c leave_pack).
+// leavePack takes an item out of the pack (pack.c leave_pack), keeping
+// the repeat-command bookkeeping; the pack surgery is
+// Player.removeFromPack.
 func (g *RogueGame) leavePack(obj *Object, newobj, all bool) *Object {
-	p := &g.Player
-	p.Inpack--
-
-	nobj := obj
 	if obj.Count > 1 && !all {
 		g.LastPick = obj
-
-		obj.Count--
-		if obj.Group != 0 {
-			p.Inpack++
-		}
-
-		if newobj {
-			copied := *obj
-			nobj = &copied
-			nobj.Count = 1
-		}
 	} else {
 		g.LastPick = nil
-		p.PackUsed[obj.PackCh-'a'] = false
-		detachObj(&p.Pack, obj)
 	}
 
-	return nobj
+	return g.Player.removeFromPack(obj, newobj, all)
-}
-
-// packChar returns the next unused pack character (pack.c pack_char).
-func (g *RogueGame) packChar() byte {
-	p := &g.Player
-	for i := range p.PackUsed {
-		if !p.PackUsed[i] {
-			p.PackUsed[i] = true
-
-			return byte(i) + 'a'
-		}
-	}
-
-	return byte(len(p.PackUsed)) + 'a' // C would walk off the array here
 }
 
 // inventory lists what is in the pack; returns true if there is something
@@ -236,7 +207,7 @@ func (g *RogueGame) inventory(list []*Object, kind ObjectKind) bool {
 		g.NObjs++
 		g.Msgs.MsgEsc = true
 
-		line := string(item.PackCh) + ") " + g.invName(item, false)
+		line := string(item.PackCh) + ") " + g.inventoryName(item, false)
 		if g.addLine("%s", line) == Escape {
 			g.Msgs.MsgEsc = false
 			g.msg("")
@@ -277,7 +248,7 @@ func (g *RogueGame) pickUp(ch byte) {
 		return
 	}
 
-	obj := g.findObj(p.Pos.Y, p.Pos.X)
+	obj := g.Level.ObjectAt(p.Pos.Y, p.Pos.X)
 	if g.MoveOn {
 		g.moveMsg(obj)
 
@@ -291,7 +262,7 @@ func (g *RogueGame) pickUp(ch byte) {
 		}
 
 		g.money(obj.GoldValue)
-		detachObj(&g.Level.Objects, obj)
+		g.Level.RemoveObject(obj)
 
 		p.Room.GoldVal = 0
 	default:
@@ -323,7 +294,7 @@ func (g *RogueGame) moveMsg(obj *Object) {
 		g.addmsgf("you ")
 	}
 
-	g.msg("moved onto %s", g.invName(obj, true))
+	g.msg("moved onto %s", g.inventoryName(obj, true))
 }
 
 // pickyInven allows the player to inventory a single item (pack.c
@@ -337,7 +308,7 @@ func (g *RogueGame) pickyInven() {
 	}
 
 	if len(p.Pack) == 1 {
-		g.msg("a) %s", g.invName(p.Pack[0], false))
+		g.msg("a) %s", g.inventoryName(p.Pack[0], false))
 
 		return
 	}
@@ -354,7 +325,7 @@ func (g *RogueGame) pickyInven() {
 
 	for _, obj := range p.Pack {
 		if mch == obj.PackCh {
-			g.msg("%c) %s", mch, g.invName(obj, false))
+			g.msg("%c) %s", mch, g.inventoryName(obj, false))
 
 			return
 		}
@@ -363,23 +334,24 @@ func (g *RogueGame) pickyInven() {
 	g.msg("'%s' not in pack", unctrl(mch))
 }
 
-// getItem picks something out of a pack for a purpose (pack.c get_item).
+// promptPackItem picks something out of a pack for a purpose (pack.c
-func (g *RogueGame) getItem(purpose string, kind ObjectKind) *Object {
+// get_item); ok reports whether the player chose an item.
+func (g *RogueGame) promptPackItem(purpose string, kind ObjectKind) (obj *Object, ok bool) {
 	p := &g.Player
 	if len(p.Pack) == 0 {
 		g.msg("you aren't carrying anything")
 
-		return nil
+		return nil, false
 	}
 
 	if g.Again {
 		if g.LastPick != nil {
-			return g.LastPick
+			return g.LastPick, true
 		}
 
 		g.msg("you ran out")
 
-		return nil
+		return nil, false
 	}
 
 	for {
@@ -402,7 +374,7 @@ func (g *RogueGame) getItem(purpose string, kind ObjectKind) *Object {
 			g.After = false
 			g.msg("")
 
-			return nil
+			return nil, false
 		}
 
 		g.NObjs = 1 // normal case: person types one char
@@ -411,7 +383,7 @@ func (g *RogueGame) getItem(purpose string, kind ObjectKind) *Object {
 			if !g.inventory(p.Pack, kind) {
 				g.After = false
 
-				return nil
+				return nil, false
 			}
 
 			continue
@@ -419,7 +391,7 @@ func (g *RogueGame) getItem(purpose string, kind ObjectKind) *Object {
 
 		for _, obj := range p.Pack {
 			if obj.PackCh == ch {
-				return obj
+				return obj, true
 			}
 		}
 

game/passages.go

@@ -2,8 +2,8 @@ package game
 
 // passages.c — draw the connecting passages.
 
-// doPassages draws all the passages on a level (passages.c do_passages).
+// digPassages draws all the passages on a level (passages.c do_passages).
-func (g *RogueGame) doPassages() {
+func (g *RogueGame) digPassages() {
 	var (
 		isconn  [MaxRooms][MaxRooms]bool
 		ingraph [MaxRooms]bool
@@ -41,7 +41,7 @@ func (g *RogueGame) doPassages() {
 			// otherwise, connect new room to the graph, and draw a tunnel
 			// to it
 			ingraph[r2] = true //nolint:gosec // G602: rnd(MaxRooms) bounded
-			g.conn(r1, r2)
+			g.connectRooms(r1, r2)
 			isconn[r1][r2] = true
 			isconn[r2][r1] = true //nolint:gosec // G602: rnd(MaxRooms) bounded
 			roomcount++
@@ -69,18 +69,18 @@ func (g *RogueGame) doPassages() {
 		}
 		// if there is one, connect it and look for the next added passage
 		if j != 0 {
-			g.conn(r1, r2)
+			g.connectRooms(r1, r2)
 			isconn[r1][r2] = true
 			isconn[r2][r1] = true //nolint:gosec // G602: rnd(MaxRooms) bounded
 		}
 	}
 
-	g.passnum()
+	g.numberPassages()
 }
 
-// conn draws a corridor from a room in a certain direction (passages.c
+// connectRooms draws a corridor from a room in a certain direction
-// conn).
+// (passages.c conn).
-func (g *RogueGame) conn(r1, r2 int) {
+func (g *RogueGame) connectRooms(r1, r2 int) {
 	var (
 		rm    int
 		direc byte
@@ -193,13 +193,13 @@ func (g *RogueGame) conn(r1, r2 int) {
 	if !rpf.Flags.Has(Gone) {
 		g.door(rpf, spos)
 	} else {
-		g.putpass(spos)
+		g.putPassage(spos)
 	}
 
 	if !rpt.Flags.Has(Gone) {
 		g.door(rpt, epos)
 	} else {
-		g.putpass(epos)
+		g.putPassage(epos)
 	}
 	// Get ready to move...
 	curr := spos
@@ -210,13 +210,13 @@ func (g *RogueGame) conn(r1, r2 int) {
 		// Check if we are at the turn place, if so do the turn
 		if distance == turnSpot {
 			for ; turnDistance > 0; turnDistance-- {
-				g.putpass(curr)
+				g.putPassage(curr)
 				curr.X += turnDelta.X
 				curr.Y += turnDelta.Y
 			}
 		}
 		// Continue digging along
-		g.putpass(curr)
+		g.putPassage(curr)
 
 		distance--
 	}
@@ -229,9 +229,9 @@ func (g *RogueGame) conn(r1, r2 int) {
 	}
 }
 
-// putpass adds a passage character or secret passage here (passages.c
+// putPassage adds a passage character or secret passage here (passages.c
 // putpass).
-func (g *RogueGame) putpass(cp Coord) {
+func (g *RogueGame) putPassage(cp Coord) {
 	pp := g.Level.At(cp.Y, cp.X)
 	pp.Flags.Set(FPassage)
 
@@ -302,8 +302,8 @@ func (g *RogueGame) addPass() {
 	}
 }
 
-// passnum assigns a number to each passageway (passages.c passnum).
+// numberPassages assigns a number to each passageway (passages.c passnum).
-func (g *RogueGame) passnum() {
+func (g *RogueGame) numberPassages() {
 	g.pnum = 0
 
 	g.newpnum = false
@@ -315,14 +315,14 @@ func (g *RogueGame) passnum() {
 		rp := &g.Level.Rooms[i]
 		for j := range rp.Exits {
 			g.newpnum = true
-			g.numpass(rp.Exits[j].Y, rp.Exits[j].X)
+			g.numberPassage(rp.Exits[j].Y, rp.Exits[j].X)
 		}
 	}
 }
 
-// numpass numbers a passageway square and its brethren (passages.c
+// numberPassage numbers a passageway square and its brethren (passages.c
 // numpass).
-func (g *RogueGame) numpass(y, x int) {
+func (g *RogueGame) numberPassage(y, x int) {
 	if x >= NumCols || x < 0 || y >= NumLines || y <= 0 {
 		return
 	}
@@ -348,10 +348,10 @@ func (g *RogueGame) numpass(y, x int) {
 
 	*fp |= PlaceFlags(g.pnum) //nolint:gosec // G115: pnum < MaxPass=13
 	// recurse on the surrounding places
-	g.numpass(y+1, x)
+	g.numberPassage(y+1, x)
-	g.numpass(y-1, x)
+	g.numberPassage(y-1, x)
-	g.numpass(y, x+1)
+	g.numberPassage(y, x+1)
-	g.numpass(y, x-1)
+	g.numberPassage(y, x-1)
 }
 
 // abs is C abs() for ints.

game/potions.go

@@ -16,9 +16,9 @@ type pact struct {
 // quaff drinks a potion from the pack (potions.c quaff).
 func (g *RogueGame) quaff() {
 	p := &g.Player
-	obj := g.getItem("quaff", KindPotion)
+	obj, ok := g.promptPackItem("quaff", KindPotion)
 	// Make certain that it is something that we want to drink
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -43,13 +43,13 @@ func (g *RogueGame) quaff() {
 
 	switch obj.PotionKind() {
 	case PotionConfusion:
-		g.doPot(PotionConfusion, !trip)
+		g.applyPotionFuse(PotionConfusion, !trip)
 	case PotionPoison:
 		g.Items.Potions[PotionPoison].Know = true
 		if p.IsWearing(RingSustainStrength) {
 			g.msg("you feel momentarily sick")
 		} else {
-			g.chgStr(-(g.rnd(3) + 1))
+			g.changeStrength(-(g.rnd(3) + 1))
 			g.msg("you feel very sick now")
 			g.comeDown(0)
 		}
@@ -64,7 +64,7 @@ func (g *RogueGame) quaff() {
 		g.msg("you begin to feel better")
 	case PotionGainStrength:
 		g.Items.Potions[PotionGainStrength].Know = true
-		g.chgStr(1)
+		g.changeStrength(1)
 		g.msg("you feel stronger, now.  What bulging muscles!")
 	case PotionDetectMonsters:
 		p.Flags.Set(SenseMonsters)
@@ -118,11 +118,11 @@ func (g *RogueGame) quaff() {
 			g.SeenStairs = g.seenStairs()
 		}
 
-		g.doPot(PotionLSD, true)
+		g.applyPotionFuse(PotionLSD, true)
 	case PotionSeeInvisible:
 		show := p.On(CanSeeInvisible)
 
-		g.doPot(PotionSeeInvisible, false)
+		g.applyPotionFuse(PotionSeeInvisible, false)
 
 		if !show {
 			g.invisOn()
@@ -177,9 +177,9 @@ func (g *RogueGame) quaff() {
 
 		g.msg("hey, this tastes great.  It make you feel warm all over")
 	case PotionBlindness:
-		g.doPot(PotionBlindness, true)
+		g.applyPotionFuse(PotionBlindness, true)
 	case PotionLevitation:
-		g.doPot(PotionLevitation, true)
+		g.applyPotionFuse(PotionLevitation, true)
 	}
 
 	g.status()
@@ -194,9 +194,9 @@ func (g *RogueGame) raiseLevel() {
 	g.checkLevel()
 }
 
-// doPot does a potion with standard setup: it uses a fuse and turns on a
+// applyPotionFuse does a potion with standard setup: it uses a fuse and
-// flag (potions.c do_pot).
+// turns on a flag (potions.c do_pot).
-func (g *RogueGame) doPot(kind PotionKind, knowit bool) {
+func (g *RogueGame) applyPotionFuse(kind PotionKind, knowit bool) {
 	pp := &g.data.pActions[kind]
 	if !g.Items.Potions[kind].Know {
 		g.Items.Potions[kind].Know = knowit

game/rings.go

@@ -7,9 +7,9 @@ import "fmt"
 // ringOn puts a ring on a hand (rings.c ring_on).
 func (g *RogueGame) ringOn() {
 	p := &g.Player
-	obj := g.getItem("put on", KindRing)
+	obj, ok := g.promptPackItem("put on", KindRing)
 	// Make certain that it is something that we want to wear
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -54,7 +54,7 @@ func (g *RogueGame) ringOn() {
 	// Calculate the effect it has on the poor guy.
 	switch obj.RingKind() {
 	case RingAddStrength:
-		g.chgStr(obj.Bonus)
+		g.changeStrength(obj.Bonus)
 	case RingSeeInvisible:
 		g.invisOn()
 	case RingAggravateMonsters:
@@ -65,7 +65,7 @@ func (g *RogueGame) ringOn() {
 		g.addmsgf("you are now wearing ")
 	}
 
-	g.msg("%s (%c)", g.invName(obj, true), obj.PackCh)
+	g.msg("%s (%c)", g.inventoryName(obj, true), obj.PackCh)
 }
 
 // ringOff takes off a ring (rings.c ring_off).
@@ -103,7 +103,7 @@ func (g *RogueGame) ringOff() {
 	}
 
 	if g.dropCheck(obj) {
-		g.msg("was wearing %s(%c)", g.invName(obj, true), obj.PackCh)
+		g.msg("was wearing %s(%c)", g.inventoryName(obj, true), obj.PackCh)
 	}
 }
 

game/rip.go

@@ -189,7 +189,7 @@ func (g *RogueGame) totalWinner() {
 		}
 
 		g.scr.Std.MvPrintwf(line, 0, "%c) %5d  %s", obj.PackCh, worth,
-			g.invName(obj, false))
+			g.inventoryName(obj, false))
 		line++
 		p.Purse += worth
 	}

game/rooms.go

@@ -17,9 +17,9 @@ type mazeState struct {
 
 const goldGrp = 1
 
-// doRooms creates rooms and corridors with a connectivity graph (rooms.c
+// digRooms creates rooms and corridors with a connectivity graph (rooms.c
 // do_rooms).
-func (g *RogueGame) doRooms() {
+func (g *RogueGame) digRooms() {
 	var bsze Coord // maximum room size
 
 	bsze.X = NumCols / 3
@@ -34,7 +34,7 @@ func (g *RogueGame) doRooms() {
 	// Put the gone rooms, if any, on the level
 	leftOut := g.rnd(4)
 	for range leftOut {
-		g.Level.Rooms[g.rndRoom()].Flags.Set(Gone)
+		g.Level.Rooms[g.randomRoom()].Flags.Set(Gone)
 	}
 	// dig and populate all the rooms on the level
 	for i := range g.Level.Rooms {
@@ -105,7 +105,7 @@ func (g *RogueGame) doRooms() {
 			gold.Flags = Stackable
 			gold.Group = goldGrp
 			gold.Kind = KindGold
-			attachObj(&g.Level.Objects, gold)
+			g.Level.AddObject(gold)
 		}
 		// Put the monster in
 		prob := 25
@@ -126,7 +126,7 @@ func (g *RogueGame) doRooms() {
 // rooms; for maze rooms, draws the maze (rooms.c draw_room).
 func (g *RogueGame) drawRoom(rp *Room) {
 	if rp.Flags.Has(Maze) {
-		g.doMaze(rp)
+		g.digMaze(rp)
 
 		return
 	}
@@ -158,8 +158,8 @@ func (g *RogueGame) horiz(rp *Room, starty int) {
 	}
 }
 
-// doMaze digs a maze (rooms.c do_maze).
+// digMaze digs a maze (rooms.c do_maze).
-func (g *RogueGame) doMaze(rp *Room) {
+func (g *RogueGame) digMaze(rp *Room) {
 	m := &g.maze
 	for y := range m.maze {
 		for x := range m.maze[y] {
@@ -175,7 +175,7 @@ func (g *RogueGame) doMaze(rp *Room) {
 	starty := (g.rnd(rp.Max.Y) / 2) * 2
 	startx := (g.rnd(rp.Max.X) / 2) * 2
 	pos := Coord{Y: starty + m.starty, X: startx + m.startx}
-	g.putpass(pos)
+	g.putPassage(pos)
 	g.dig(starty, startx)
 }
 
@@ -211,8 +211,8 @@ func (g *RogueGame) dig(y, x int) {
 			return
 		}
 
-		g.accntMaze(y, x, nexty, nextx)
+		g.accountMaze(y, x, nexty, nextx)
-		g.accntMaze(nexty, nextx, y, x)
+		g.accountMaze(nexty, nextx, y, x)
 
 		var pos Coord
 		if nexty == y {
@@ -231,16 +231,16 @@ func (g *RogueGame) dig(y, x int) {
 			}
 		}
 
-		g.putpass(pos)
+		g.putPassage(pos)
 		pos.Y = nexty + m.starty
 		pos.X = nextx + m.startx
-		g.putpass(pos)
+		g.putPassage(pos)
 		g.dig(nexty, nextx)
 	}
 }
 
-// accntMaze accounts for maze exits (rooms.c accnt_maze).
+// accountMaze accounts for maze exits (rooms.c accnt_maze).
-func (g *RogueGame) accntMaze(y, x, ny, nx int) {
+func (g *RogueGame) accountMaze(y, x, ny, nx int) {
 	sp := &g.maze.maze[y][x]
 	for i := range sp.nexits {
 		if sp.exits[i].Y == ny && sp.exits[i].X == nx {
@@ -255,8 +255,8 @@ func (g *RogueGame) accntMaze(y, x, ny, nx int) {
 	}
 }
 
-// rndPos picks a random spot in a room (rooms.c rnd_pos).
+// randomPos picks a random spot in a room (rooms.c rnd_pos).
-func (g *RogueGame) rndPos(rp *Room) Coord {
+func (g *RogueGame) randomPos(rp *Room) Coord {
 	var cp Coord
 
 	cp.X = rp.Pos.X + g.rnd(rp.Max.X-2) + 1
@@ -296,7 +296,7 @@ func (g *RogueGame) findFloorImpl(rp *Room, limit int, monst, pickroom bool) (Co
 		}
 
 		if pickroom {
-			rp = &g.Level.Rooms[g.rndRoom()]
+			rp = &g.Level.Rooms[g.randomRoom()]
 
 			compchar = Floor
 			if rp.Flags.Has(Maze) {
@@ -304,7 +304,7 @@ func (g *RogueGame) findFloorImpl(rp *Room, limit int, monst, pickroom bool) (Co
 			}
 		}
 
-		cp := g.rndPos(rp)
+		cp := g.randomPos(rp)
 
 		pp := g.Level.At(cp.Y, cp.X)
 		if monst {
@@ -321,7 +321,7 @@ func (g *RogueGame) findFloorImpl(rp *Room, limit int, monst, pickroom bool) (Co
 // enter_room).
 func (g *RogueGame) enterRoom(cp Coord) {
 	p := &g.Player
-	rp := g.roomin(cp)
+	rp := g.roomIn(cp)
 	p.Room = rp
 	g.doorOpen(rp)
 

game/save.go

@@ -449,12 +449,14 @@ func (g *RogueGame) applySnapshot(st *SaveState) {
 	g.scr.Std.SetContents(st.Screen)
 }
 
-// saveGame implements the "save game" command (save.c save_game). The C
+// saveGame implements the "save game" command (save.c save_game). The
-// goto over/gotfile flow becomes the useDefault flag.
+// labeled prompt loop and the useDefault flag stand in for the C
+// goto over/gotfile flow.
 func (g *RogueGame) saveGame() {
 	g.Msgs.Mpos = 0
 
-over:
+prompt:
+	for {
 		useDefault := false
 
 		if g.FileName != "" {
@@ -522,7 +524,7 @@ over:
 					}
 
 					if c == 'n' || c == 'N' {
-					goto over
+						continue prompt // the C goto over: start again
 					}
 
 					g.msg("Please answer Y or N")
@@ -541,7 +543,8 @@ over:
 				continue
 			}
 
-		break
+			break prompt
+		}
 	}
 
 	g.myExit()
@@ -615,6 +618,7 @@ func Restore(path string, cfg Config) (*RogueGame, error) {
 		restored:  true,
 	}
 	g.scr = NewScreen(cfg.Term)
+	g.Msgs.attach(g.scr, g.look, g.readchar)
 	g.applySnapshot(&st)
 
 	// defeat multiple restarting from the same place

game/scrolls.go

@@ -7,8 +7,8 @@ package game
 func (g *RogueGame) readScroll() {
 	p := &g.Player
 
-	obj := g.getItem("read", KindScroll)
+	obj, ok := g.promptPackItem("read", KindScroll)
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -104,7 +104,7 @@ func (g *RogueGame) readScroll() {
 				// Or anything else nasty
 				if ch := g.Level.VisibleChar(y, x); stepOk(ch) {
 					if ch == Scroll {
-						if fo := g.findObj(y, x); fo != nil && fo.ScrollKind() == ScrollScareMonster {
+						if fo := g.Level.ObjectAt(y, x); fo != nil && fo.ScrollKind() == ScrollScareMonster {
 							continue
 						}
 					}

game/sticks.go

@@ -14,8 +14,8 @@ const (
 func (g *RogueGame) doZap() {
 	p := &g.Player
 
-	obj := g.getItem("zap with", KindWand)
+	obj, ok := g.promptPackItem("zap with", KindWand)
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -80,12 +80,12 @@ func (g *RogueGame) doZap() {
 			case WandInvisibility:
 				tp.Flags.Set(Invisible)
 
-				if g.cansee(y, x) {
+				if g.canSee(y, x) {
 					g.mvaddch(y, x, tp.OldCh)
 				}
 			case WandPolymorph:
 				pp := tp.Pack
-				detachMon(&g.Level.Monsters, tp)
+				g.Level.RemoveMonster(tp)
 
 				if g.seeMonst(tp) {
 					g.mvaddch(y, x, g.Level.Char(y, x))
@@ -186,7 +186,7 @@ func (g *RogueGame) doZap() {
 
 			g.Delta.Y = y
 			g.Delta.X = x
-			g.runto(g.Delta)
+			g.runTo(g.Delta)
 		}
 	case WandLightning, WandFire, WandCold:
 		var name string
@@ -243,7 +243,7 @@ func (g *RogueGame) drain() {
 		if mp.Stats.HP -= cnt; mp.Stats.HP <= 0 {
 			g.killed(mp, g.seeMonst(mp))
 		} else {
-			g.runto(mp.Pos)
+			g.runTo(mp.Pos)
 		}
 	}
 }
@@ -339,7 +339,7 @@ func (g *RogueGame) fireBolt(start Coord, dir *Coord, name string) {
 				}
 			} else if ch != 'M' || tp.Disguise == 'M' {
 				if fromHero {
-					g.runto(pos)
+					g.runTo(pos)
 				}
 
 				if g.Options.Terse {

game/tables.go

@@ -94,7 +94,7 @@ type gameData struct {
 	initWeaps [NumWeaponTypes]weaponSetup
 
 	// pActions is potions.c p_actions[]. The P_SEEINVIS message is dynamic
-	// (it names the fruit) and is computed in doPot.
+	// (it names the fruit) and is computed in applyPotionFuse.
 	pActions [NumPotionTypes]pact
 
 	// idType maps identify scrolls to the kind of item they identify

game/things.go

@@ -9,7 +9,7 @@ import (
 
 // invName returns the name of something as it would appear in an inventory
 // (things.c inv_name).
-func (g *RogueGame) invName(obj *Object, drop bool) string {
+func (g *RogueGame) inventoryName(obj *Object, drop bool) string {
 	var pb strings.Builder
 
 	which := obj.Which
@@ -142,8 +142,8 @@ func (g *RogueGame) dropIt() {
 		return
 	}
 
-	obj := g.getItem("drop", KindNone)
+	obj, ok := g.promptPackItem("drop", KindNone)
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -153,7 +153,7 @@ func (g *RogueGame) dropIt() {
 
 	obj = g.leavePack(obj, true, !obj.Kind.MergesInPack())
 	// Link it into the level object list
-	attachObj(&g.Level.Objects, obj)
+	g.Level.AddObject(obj)
 	g.Level.SetChar(p.Pos.Y, p.Pos.X, obj.Kind.Glyph())
 	g.Level.FlagsAt(p.Pos.Y, p.Pos.X).Set(FDropped)
 
@@ -162,7 +162,7 @@ func (g *RogueGame) dropIt() {
 		g.HasAmulet = false
 	}
 
-	g.msg("dropped %s", g.invName(obj, true))
+	g.msg("dropped %s", g.inventoryName(obj, true))
 }
 
 // dropCheck does special checks for dropping or unwielding|unwearing|
@@ -201,7 +201,7 @@ func (g *RogueGame) dropCheck(obj *Object) bool {
 
 		switch obj.RingKind() {
 		case RingAddStrength:
-			g.chgStr(-obj.Bonus)
+			g.changeStrength(-obj.Bonus)
 		case RingSeeInvisible:
 			g.unsee(0)
 			g.Extinguish(DUnsee)
@@ -392,7 +392,7 @@ func (g *RogueGame) printDisc(typ byte) {
 		if info[order[i]].Know || info[order[i]].Guess != "" {
 			obj.Kind = objectKindForGlyph(typ)
 			obj.Which = order[i]
-			g.addLine("%s", g.invName(&obj, false))
+			g.addLine("%s", g.inventoryName(&obj, false))
 
 			numFound++
 		}

game/weapons.go

@@ -9,8 +9,8 @@ const noWeapon WeaponKind = -1
 // missile fires a missile in a given direction (weapons.c missile).
 func (g *RogueGame) missile(ydelta, xdelta int) {
 	// Get which thing we are hurling
-	obj := g.getItem("throw", KindWeapon)
+	obj, ok := g.promptPackItem("throw", KindWeapon)
-	if obj == nil {
+	if !ok {
 		return
 	}
 
@@ -36,7 +36,7 @@ func (g *RogueGame) doMotion(obj *Object, ydelta, xdelta int) {
 	obj.Pos = p.Pos
 	for {
 		// Erase the old one
-		if obj.Pos != p.Pos && g.cansee(obj.Pos.Y, obj.Pos.X) && !g.Options.Terse {
+		if obj.Pos != p.Pos && g.canSee(obj.Pos.Y, obj.Pos.X) && !g.Options.Terse {
 			ch := g.Level.Char(obj.Pos.Y, obj.Pos.X)
 			if ch == Floor && !g.showFloor() {
 				ch = ' '
@@ -51,7 +51,7 @@ func (g *RogueGame) doMotion(obj *Object, ydelta, xdelta int) {
 		ch := g.Level.VisibleChar(obj.Pos.Y, obj.Pos.X)
 		if stepOk(ch) && ch != Door {
 			// It hasn't hit anything yet, so display it if it's alright.
-			if g.cansee(obj.Pos.Y, obj.Pos.X) && !g.Options.Terse {
+			if g.canSee(obj.Pos.Y, obj.Pos.X) && !g.Options.Terse {
 				g.mvaddch(obj.Pos.Y, obj.Pos.X, obj.Kind.Glyph())
 				g.refresh()
 			}
@@ -70,7 +70,7 @@ func (g *RogueGame) fall(obj *Object, pr bool) {
 		pp.Ch = obj.Kind.Glyph()
 
 		obj.Pos = fpos
-		if g.cansee(fpos.Y, fpos.X) {
+		if g.canSee(fpos.Y, fpos.X) {
 			if pp.Monst != nil {
 				pp.Monst.OldCh = obj.Kind.Glyph()
 			} else {
@@ -78,7 +78,7 @@ func (g *RogueGame) fall(obj *Object, pr bool) {
 			}
 		}
 
-		attachObj(&g.Level.Objects, obj)
+		g.Level.AddObject(obj)
 
 		return
 	}
@@ -113,8 +113,8 @@ func (g *RogueGame) wield() {
 
 	p.CurWeapon = oweapon
 
-	obj := g.getItem("wield", KindWeapon)
+	obj, ok := g.promptPackItem("wield", KindWeapon)
-	if obj == nil {
+	if !ok {
 		g.After = false
 
 		return
@@ -133,7 +133,7 @@ func (g *RogueGame) wield() {
 		return
 	}
 
-	sp := g.invName(obj, true)
+	sp := g.inventoryName(obj, true)
 	p.CurWeapon = obj
 
 	if !g.Options.Terse {

game/wizard.go

@@ -119,7 +119,7 @@ func (g *RogueGame) whatis(insist bool, kind ObjectKind) {
 
 	var obj *Object
 	for {
-		obj = g.getItem("identify", kind)
+		obj, _ = g.promptPackItem("identify", kind)
 
 		if !insist {
 			break
@@ -161,7 +161,7 @@ func (g *RogueGame) whatis(insist bool, kind ObjectKind) {
 		setKnow(obj, g.Items.Rings[:])
 	}
 
-	g.msg("%s", g.invName(obj, false))
+	g.msg("%s", g.inventoryName(obj, false))
 }
 
 // setKnow sets things up when we really know what a thing is (wizard.c
@@ -181,7 +181,7 @@ func (g *RogueGame) teleport() {
 	g.mvaddch(p.Pos.Y, p.Pos.X, g.floorAt())
 
 	c, _ := g.findFloor(true)
-	if g.roomin(c) != p.Room {
+	if g.roomIn(c) != p.Room {
 		g.leaveRoom(p.Pos)
 		p.Pos = c
 		g.enterRoom(p.Pos)