X-Git-Url: http://git.scottworley.com/planeteer/blobdiff_plain/fc93fd36d80c2e19b770e0fd57eacd6c8b2779c6..58c3880d618ba797aba4e17e9feceb5dd9c24d34:/planeteer.go

diff --git a/planeteer.go b/planeteer.go
index 2bb1b55..6c8f087 100644
--- a/planeteer.go
+++ b/planeteer.go
@@ -133,13 +133,21 @@ type planet_data struct {
 	i2p, i2c    []string       // Generated; not read from file
 }
 
-func ReadData() (data planet_data) {
-	f, err := os.Open(*planet_data_file)
+func json_slurp(filename string, receptacle interface{}) error {
+	f, err := os.Open(filename)
 	if err != nil {
-		panic(err)
+		return err
 	}
 	defer f.Close()
-	err = json.NewDecoder(f).Decode(&data)
+	err = json.NewDecoder(f).Decode(receptacle)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func ReadData() (data planet_data) {
+	err := json_slurp(*planet_data_file, &data)
 	if err != nil {
 		panic(err)
 	}
@@ -212,13 +220,13 @@ func bint(b bool) int {
 	return 0
 }
 
-func DimensionSizes(data planet_data) []int {
+func DimensionSizes(data planet_data) LogicalIndex {
 	eden_capacity := data.Commodities["Eden Warp Units"].Limit
 	if *start_edens > eden_capacity {
 		eden_capacity = *start_edens
 	}
 	cloak_capacity := bint(*cloak)
-	dims := make([]int, NumDimensions)
+	dims := make(LogicalIndex, NumDimensions)
 	dims[Edens] = eden_capacity + 1
 	dims[Cloaks] = cloak_capacity + 1
 	dims[UnusedCargo] = eden_capacity + cloak_capacity + 1
@@ -239,7 +247,11 @@ func DimensionSizes(data planet_data) []int {
 	return dims
 }
 
-func StateTableSize(dims []int) int {
+type Value int32
+type PhysicalIndex int32
+type LogicalIndex []int
+
+func StateTableSize(dims LogicalIndex) int {
 	product := 1
 	for _, size := range dims {
 		product *= size
@@ -247,9 +259,6 @@ func StateTableSize(dims []int) int {
 	return product
 }
 
-type Value int32
-type PhysicalIndex int32
-
 type State struct {
 	value Value
 	from  PhysicalIndex
@@ -263,7 +272,7 @@ const (
 	VALUE_RUBISH
 )
 
-func EncodeIndex(dims, addr []int) PhysicalIndex {
+func EncodeIndex(dims, addr LogicalIndex) PhysicalIndex {
 	index := addr[0]
 	if addr[0] > dims[0] {
 		panic(0)
@@ -277,9 +286,9 @@ func EncodeIndex(dims, addr []int) PhysicalIndex {
 	return PhysicalIndex(index)
 }
 
-func DecodeIndex(dims []int, index PhysicalIndex) []int {
+func DecodeIndex(dims LogicalIndex, index PhysicalIndex) LogicalIndex {
 	scratch := int(index)
-	addr := make([]int, NumDimensions)
+	addr := make(LogicalIndex, NumDimensions)
 	for i := NumDimensions - 1; i > 0; i-- {
 		addr[i] = scratch % dims[i]
 		scratch /= dims[i]
@@ -288,19 +297,35 @@ func DecodeIndex(dims []int, index PhysicalIndex) []int {
 	return addr
 }
 
-func CreateStateTable(data planet_data, dims []int) []State {
+func PlanetIndex(data planet_data, name string) int {
+	index, ok := data.p2i[name]
+	if !ok {
+		panic("Unknown planet " + name)
+	}
+	return index
+}
+
+func CommodityIndex(data planet_data, name string) int {
+	index, ok := data.c2i[name]
+	if !ok {
+		panic("Unknown commodity " + name)
+	}
+	return index
+}
+
+func CreateStateTable(data planet_data, dims LogicalIndex) []State {
 	table := make([]State, StateTableSize(dims))
 	for i := range table {
 		table[i].value = VALUE_UNINITIALIZED
 		table[i].from = FROM_UNINITIALIZED
 	}
 
-	addr := make([]int, NumDimensions)
+	addr := make(LogicalIndex, NumDimensions)
 	addr[Fuel] = *fuel
 	addr[Edens] = *start_edens
-	addr[Location] = data.p2i[*start]
+	addr[Location] = PlanetIndex(data, *start)
 	if *start_hold != "" {
-		addr[Hold] = data.c2i[*start_hold]
+		addr[Hold] = CommodityIndex(data,*start_hold)
 	}
 	start_index := EncodeIndex(dims, addr)
 	table[start_index].value = Value(*funds)
@@ -312,7 +337,7 @@ func CreateStateTable(data planet_data, dims []int) []State {
 /* CellValue fills in the one cell at address addr by looking at all
  * the possible ways to reach this cell and selecting the best one. */
 
-func Consider(data planet_data, dims []int, table []State, there []int, value_difference int, best_value *Value, best_source []int) {
+func Consider(data planet_data, dims LogicalIndex, table []State, there LogicalIndex, value_difference int, best_value *Value, best_source LogicalIndex) {
 	there_value := CellValue(data, dims, table, there)
 	if value_difference < 0 && Value(-value_difference) > there_value {
 		/* Can't afford this transition */
@@ -327,7 +352,7 @@ func Consider(data planet_data, dims []int, table []State, there []int, value_di
 
 var cell_filled_count int
 
-func CellValue(data planet_data, dims []int, table []State, addr []int) Value {
+func CellValue(data planet_data, dims LogicalIndex, table []State, addr LogicalIndex) Value {
 	my_index := EncodeIndex(dims, addr)
 	if table[my_index].value == VALUE_BEING_EVALUATED {
 		panic("Circular dependency")
@@ -338,8 +363,8 @@ func CellValue(data planet_data, dims []int, table []State, addr []int) Value {
 	table[my_index].value = VALUE_BEING_EVALUATED
 
 	best_value := Value(VALUE_RUBISH)
-	best_source := make([]int, NumDimensions)
-	other := make([]int, NumDimensions)
+	best_source := make(LogicalIndex, NumDimensions)
+	other := make(LogicalIndex, NumDimensions)
 	copy(other, addr)
 	planet := data.i2p[addr[Location]]
 
@@ -348,14 +373,12 @@ func CellValue(data planet_data, dims []int, table []State, addr []int) Value {
 		other[Traded] = 1 /* Travel from states that have done trading. */
 
 		/* Travel here via a 2-fuel unit jump */
-		if addr[Fuel]+2 < dims[Fuel] {
+		if data.Planets[data.i2p[addr[Location]]].BeaconOn && addr[Fuel]+2 < dims[Fuel] {
 			other[Fuel] = addr[Fuel] + 2
 			hole_index := (dims[Fuel] - 1) - (addr[Fuel] + 2)
-			if hole_index >= len(flight_plan()) || addr[Location] != data.p2i[flight_plan()[hole_index]] {
+			if hole_index >= len(flight_plan()) || addr[Location] != PlanetIndex(data, flight_plan()[hole_index]) {
 				for other[Location] = 0; other[Location] < dims[Location]; other[Location]++ {
-					if data.Planets[data.i2p[addr[Location]]].BeaconOn {
-						Consider(data, dims, table, other, 0, &best_value, best_source)
-					}
+					Consider(data, dims, table, other, 0, &best_value, best_source)
 				}
 			}
 			other[Location] = addr[Location]
@@ -365,7 +388,7 @@ func CellValue(data planet_data, dims []int, table []State, addr []int) Value {
 		/* Travel here via a 1-fuel unit jump (a hyper hole) */
 		if addr[Fuel]+1 < dims[Fuel] {
 			hole_index := (dims[Fuel] - 1) - (addr[Fuel] + 1)
-			if hole_index < len(flight_plan()) && addr[Location] == data.p2i[flight_plan()[hole_index]] {
+			if hole_index < len(flight_plan()) && addr[Location] == PlanetIndex(data, flight_plan()[hole_index]) {
 				other[Fuel] = addr[Fuel] + 1
 				for other[Location] = 0; other[Location] < dims[Location]; other[Location]++ {
 					Consider(data, dims, table, other, 0, &best_value, best_source)
@@ -544,8 +567,8 @@ func CellValue(data planet_data, dims []int, table []State, addr []int) Value {
 	return table[my_index].value
 }
 
-func FinalState(dims []int) []int {
-	addr := make([]int, NumDimensions)
+func FinalState(dims LogicalIndex) LogicalIndex {
+	addr := make(LogicalIndex, NumDimensions)
 	addr[Edens] = *end_edens
 	addr[Cloaks] = dims[Cloaks] - 1
 	addr[BuyFighters] = dims[BuyFighters] - 1
@@ -558,7 +581,7 @@ func FinalState(dims []int) []int {
 	return addr
 }
 
-func FindBestState(data planet_data, dims []int, table []State, addr []int) PhysicalIndex {
+func FindBestState(data planet_data, dims LogicalIndex, table []State, addr LogicalIndex) PhysicalIndex {
 	max_index := PhysicalIndex(-1)
 	max_value := 0.0
 	max_fuel := 1
@@ -598,7 +621,7 @@ func Commas(n Value) (s string) {
 	return
 }
 
-func FighterAndShieldCost(data planet_data, dims []int, table []State, best PhysicalIndex) {
+func FighterAndShieldCost(data planet_data, dims LogicalIndex, table []State, best PhysicalIndex) {
 	if *drones == 0 && *batteries == 0 {
 		return
 	}
@@ -608,18 +631,18 @@ func FighterAndShieldCost(data planet_data, dims []int, table []State, best Phys
 		final_state[BuyFighters] = 0
 		alt_best := FindBestState(data, dims, table, final_state)
 		cost := table[alt_best].value - table[best].value
-		fmt.Println("\rDrones were", float64(cost)/float64(*drones), "each")
+		fmt.Printf("\rDrones were %.2f each\n", float64(cost)/float64(*drones))
 	}
 	if *batteries > 0 {
 		final_state := FinalState(dims)
 		final_state[BuyShields] = 0
 		alt_best := FindBestState(data, dims, table, final_state)
 		cost := table[alt_best].value - table[best].value
-		fmt.Println("\rBatteries were", float64(cost)/float64(*batteries), "each")
+		fmt.Printf("\rBatteries were %.2f each\n", float64(cost)/float64(*batteries))
 	}
 }
 
-func EndEdensCost(data planet_data, dims []int, table []State, best PhysicalIndex) {
+func EndEdensCost(data planet_data, dims LogicalIndex, table []State, best PhysicalIndex) {
 	if *end_edens == 0 {
 		return
 	}
@@ -635,7 +658,7 @@ func EndEdensCost(data planet_data, dims []int, table []State, best PhysicalInde
 	}
 }
 
-func VisitCost(data planet_data, dims []int, table []State, best PhysicalIndex) {
+func VisitCost(data planet_data, dims LogicalIndex, table []State, best PhysicalIndex) {
 	if dims[Visit] == 1 {
 		return
 	}
@@ -650,7 +673,7 @@ func VisitCost(data planet_data, dims []int, table []State, best PhysicalIndex)
 	}
 }
 
-func EndLocationCost(data planet_data, dims []int, table []State, best PhysicalIndex) {
+func EndLocationCost(data planet_data, dims LogicalIndex, table []State, best PhysicalIndex) {
 	if len(end()) == 0 {
 		return
 	}
@@ -665,7 +688,7 @@ func EndLocationCost(data planet_data, dims []int, table []State, best PhysicalI
 	*end_string = save_end_string
 }
 
-func DescribePath(data planet_data, dims []int, table []State, start PhysicalIndex) (description []string) {
+func DescribePath(data planet_data, dims LogicalIndex, table []State, start PhysicalIndex) (description []string) {
 	for index := start; table[index].from > FROM_ROOT; index = table[index].from {
 		if table[index].from == FROM_UNINITIALIZED {
 			panic(index)
@@ -782,7 +805,7 @@ func main() {
 	best := FindBestState(data, dims, table, final_state)
 	print("\n")
 	if best == -1 {
-		print("Cannot acheive success criteria\n")
+		print("Cannot achieve success criteria\n")
 		return
 	}
 	description := DescribePath(data, dims, table, best)