sneak
7fa2048402
Module sneak.berlin/go/rogue, package game: - types.go: all rogue.h constants, flag types, Coord/Stats/Room/ObjInfo - creature.go/object.go: the THING union split into Creature (Player/ Monster) and Object; slices replace the C linked lists - level.go: Place map with the C column-major layout and chat/flat/moat/ winat access methods - tables.go: extern.c + init.c data (bestiary, item tables, name pools) - rng.go: the exact C LCG (seed*11109+13849), golden-tested against a compiled C reference for seed compatibility - init.go: per-game item appearance randomization (init.c) - daemon.go/daemons.go: scheduler with DaemonID replacing function pointers (ids match the C save format's mapping) - game.go: RogueGame holds all former globals; NewGame constructor
52 lines
1.3 KiB
Go
52 lines
1.3 KiB
Go
package game
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// Rng is the original Rogue linear congruential generator. The C RN macro is
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//
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// #define RN (((seed = seed*11109+13849) >> 16) & 0xffff)
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//
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// with `seed` a C int; Seed is int32 so the multiplication wraps exactly the
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// way 32-bit C arithmetic does. A given seed therefore produces the same
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// dungeon as the C game.
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type Rng struct {
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Seed int32
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}
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// next steps the generator and returns the next raw value (the RN macro).
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func (r *Rng) next() int {
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r.Seed = r.Seed*11109 + 13849
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return int(r.Seed>>16) & 0xffff
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}
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// Rnd picks a very random number in [0, rng) (main.c rnd).
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func (r *Rng) Rnd(rng int) int {
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if rng == 0 {
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return 0
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}
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v := r.next()
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if v < 0 {
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v = -v
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}
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return v % rng
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}
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// Roll rolls a number of dice (main.c roll).
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func (r *Rng) Roll(number, sides int) int {
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dtotal := 0
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for ; number > 0; number-- {
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dtotal += r.Rnd(sides) + 1
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}
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return dtotal
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}
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// rnd is the ported code's spelling of C rnd(): every call site in the C
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// sources reads rnd(x), and keeping that shape makes cross-checking easy.
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func (g *RogueGame) rnd(rng int) int { return g.Rng.Rnd(rng) }
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// roll is C roll().
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func (g *RogueGame) roll(number, sides int) int { return g.Rng.Roll(number, sides) }
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// spread gives a fuzzy number centered on nm (misc.c spread).
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func (g *RogueGame) spread(nm int) int {
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return nm - nm/20 + g.rnd(nm/10)
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}
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