Wrap and check accesses to p2i and c2i

This catches misspellings of planet and commodity names.  Otherwise,
they were defaulting (to Stockworld and nothing respectively).

diff --git a/planeteer.go b/planeteer.go
index 4976abe131d1ececa2a2b8ec256cfae2d39b609b..71a85dc9158e235dd508cf6fd1ebe18e59682c61 100644 (file)
--- a/planeteer.go
+++ b/planeteer.go
@@ -297,6 +297,22 @@ func DecodeIndex(dims LogicalIndex, index PhysicalIndex) LogicalIndex {
        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 {
@@ -307,9 +323,9 @@ func CreateStateTable(data planet_data, dims LogicalIndex) []State {
        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)
@@ -360,7 +376,7 @@ func CellValue(data planet_data, dims LogicalIndex, table []State, addr LogicalI
                if 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)
@@ -374,7 +390,7 @@ func CellValue(data planet_data, dims LogicalIndex, table []State, addr LogicalI
                /* 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)