*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
+ * published by the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
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() planet_data {
+ var data planet_data
+ err := json_slurp(*planet_data_file, &data)
if err != nil {
panic(err)
}
- return
+ return data
}
/* This program operates by filling in a state table representing the best
* * Reduce the size of the Edens dimension from 3 to 2, for the
* same reasons as Fuel above. 33% savings.
* * Buy more ram. (Just sayin'. It's cheaper than you think.)
- *
+ *
*/
// The official list of dimensions:
return addr
}
+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 {
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)
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]
/* 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)
}
/* Travel here via Eden Warp Unit */
- if addr[Edens]+1 < dims[Edens] && addr[UnusedCargo] > 0 {
+ if addr[Edens]+1 < dims[Edens] && (addr[Hold] == 0 || addr[UnusedCargo] > 0) {
_, available := data.Planets[data.i2p[addr[Location]]].RelativePrices["Eden Warp Units"]
if !available {
other[Edens] = addr[Edens] + 1
return max_index
}
-func Commas(n Value) (s string) {
+func Commas(n Value) string {
+ var s string
if n < 0 {
panic(n)
}
n /= 1000
}
s = fmt.Sprint(r) + s
- return
+ return s
}
func FighterAndShieldCost(data planet_data, dims LogicalIndex, table []State, best PhysicalIndex) {
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))
}
}
*end_string = save_end_string
}
-func DescribePath(data planet_data, dims LogicalIndex, table []State, start PhysicalIndex) (description []string) {
+func DescribePath(data planet_data, dims LogicalIndex, table []State, start PhysicalIndex) []string {
+ var description []string
for index := start; table[index].from > FROM_ROOT; index = table[index].from {
if table[index].from == FROM_UNINITIALIZED {
panic(index)
}
description = append(description, fmt.Sprintf("%13v ", Commas(table[index].value))+line)
}
- return
+ return description
}
// (Example of a use case for generics in Go)
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)
projects / planeteer / blobdiff