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-rw-r--r--src/saveload.cpp14
-rw-r--r--src/saveload.h4
-rw-r--r--src/vehicle.cpp13
3 files changed, 28 insertions, 3 deletions
diff --git a/src/saveload.cpp b/src/saveload.cpp
index 26dc7df51..420e5e98a 100644
--- a/src/saveload.cpp
+++ b/src/saveload.cpp
@@ -744,6 +744,7 @@ size_t SlCalcObjMemberLength(const void *object, const SaveLoad *sld)
default: NOT_REACHED();
}
break;
+ case SL_WRITEBYTE: return 1; // a byte is logically of size 1
case SL_INCLUDE: return SlCalcObjLength(object, _sl.includes[sld->version_from]);
default: NOT_REACHED();
}
@@ -781,6 +782,19 @@ bool SlObjectMember(void *ptr, const SaveLoad *sld)
}
break;
+ /* SL_WRITEBYTE translates a value of a variable to another one upon
+ * saving or loading.
+ * XXX - variable renaming abuse
+ * game_value: the value of the variable ingame is abused by sld->version_from
+ * file_value: the value of the variable in the savegame is abused by sld->version_to */
+ case SL_WRITEBYTE:
+ if (_sl.save) {
+ SlWriteByte(sld->version_to);
+ } else {
+ *(byte*)ptr = sld->version_from;
+ }
+ break;
+
/* SL_INCLUDE loads common code for a type
* XXX - variable renaming abuse
* include_index: common code to include from _desc_includes[], abused by sld->version_from */
diff --git a/src/saveload.h b/src/saveload.h
index 24dc9f231..78d560217 100644
--- a/src/saveload.h
+++ b/src/saveload.h
@@ -161,6 +161,7 @@ enum SaveLoadTypes {
SL_STR = 3,
SL_LST = 4,
// non-normal save-load types
+ SL_WRITEBYTE = 8,
SL_INCLUDE = 9,
SL_END = 15
};
@@ -200,6 +201,8 @@ typedef SaveLoad SaveLoadGlobVarList;
#define SLE_CONDNULL(length, from, to) SLE_CONDARR(NullStruct, null, SLE_FILE_U8 | SLE_VAR_NULL | SLF_CONFIG_NO, length, from, to)
+/* Translate values ingame to different values in the savegame and vv */
+#define SLE_WRITEBYTE(base, variable, value) SLE_GENERAL(SL_WRITEBYTE, base, variable, 0, 0, value, value)
/* Load common code and put it into each struct (currently only for vehicles */
#define SLE_INCLUDE(base, variable, include_index) SLE_GENERAL(SL_INCLUDE, base, variable, 0, 0, include_index, 0)
@@ -211,6 +214,7 @@ typedef SaveLoad SaveLoadGlobVarList;
#define SLE_VARX(offset, type) SLE_CONDVARX(offset, type, 0, SL_MAX_VERSION)
#define SLE_REFX(offset, type) SLE_CONDREFX(offset, type, 0, SL_MAX_VERSION)
+#define SLE_WRITEBYTEX(offset, something) SLE_GENERALX(SL_WRITEBYTE, offset, 0, something, 0)
#define SLE_INCLUDEX(offset, type) SLE_GENERALX(SL_INCLUDE, offset, type, 0, SL_MAX_VERSION)
/* End marker */
diff --git a/src/vehicle.cpp b/src/vehicle.cpp
index 66d0ac6a0..83550c226 100644
--- a/src/vehicle.cpp
+++ b/src/vehicle.cpp
@@ -2714,6 +2714,7 @@ extern const SaveLoad _common_veh_desc[] = {
static const SaveLoad _train_desc[] = {
+ SLE_WRITEBYTE(Vehicle, type, VEH_TRAIN),
SLE_INCLUDEX(0, INC_VEHICLE_COMMON),
SLE_VARX(cpp_offsetof(Vehicle, u) + cpp_offsetof(VehicleRail, crash_anim_pos), SLE_UINT16),
SLE_VARX(cpp_offsetof(Vehicle, u) + cpp_offsetof(VehicleRail, force_proceed), SLE_UINT8),
@@ -2731,6 +2732,7 @@ static const SaveLoad _train_desc[] = {
};
static const SaveLoad _roadveh_desc[] = {
+ SLE_WRITEBYTE(Vehicle, type, VEH_ROAD),
SLE_INCLUDEX(0, INC_VEHICLE_COMMON),
SLE_VARX(cpp_offsetof(Vehicle, u) + cpp_offsetof(VehicleRoad, state), SLE_UINT8),
SLE_VARX(cpp_offsetof(Vehicle, u) + cpp_offsetof(VehicleRoad, frame), SLE_UINT8),
@@ -2750,6 +2752,7 @@ static const SaveLoad _roadveh_desc[] = {
};
static const SaveLoad _ship_desc[] = {
+ SLE_WRITEBYTE(Vehicle, type, VEH_SHIP),
SLE_INCLUDEX(0, INC_VEHICLE_COMMON),
SLE_VARX(cpp_offsetof(Vehicle, u) + cpp_offsetof(VehicleShip, state), SLE_UINT8),
@@ -2760,6 +2763,7 @@ static const SaveLoad _ship_desc[] = {
};
static const SaveLoad _aircraft_desc[] = {
+ SLE_WRITEBYTE(Vehicle, type, VEH_AIRCRAFT),
SLE_INCLUDEX(0, INC_VEHICLE_COMMON),
SLE_VARX(cpp_offsetof(Vehicle, u) + cpp_offsetof(VehicleAir, crashed_counter), SLE_UINT16),
SLE_VARX(cpp_offsetof(Vehicle, u) + cpp_offsetof(VehicleAir, pos), SLE_UINT8),
@@ -2778,6 +2782,8 @@ static const SaveLoad _aircraft_desc[] = {
};
static const SaveLoad _special_desc[] = {
+ SLE_WRITEBYTE(Vehicle, type, VEH_SPECIAL),
+
SLE_VAR(Vehicle, subtype, SLE_UINT8),
SLE_CONDVAR(Vehicle, tile, SLE_FILE_U16 | SLE_VAR_U32, 0, 5),
@@ -2804,6 +2810,8 @@ static const SaveLoad _special_desc[] = {
};
static const SaveLoad _disaster_desc[] = {
+ SLE_WRITEBYTE(Vehicle, type, VEH_DISASTER),
+
SLE_REF(Vehicle, next, REF_VEHICLE_OLD),
SLE_VAR(Vehicle, subtype, SLE_UINT8),
@@ -2856,7 +2864,6 @@ static void Save_VEHS()
/* Write the vehicles */
FOR_ALL_VEHICLES(v) {
SlSetArrayIndex(v->index);
- SlWriteByte(v->type);
SlObject(v, (SaveLoad*)_veh_descs[v->type]);
}
}
@@ -2874,8 +2881,8 @@ static void Load_VEHS()
error("Vehicles: failed loading savegame: too many vehicles");
v = GetVehicle(index);
- v->type = (VehicleType)SlReadByte();
- SlObject(v, (SaveLoad*)_veh_descs[v->type]);
+ VehicleType vtype = (VehicleType)SlReadByte();
+ SlObject(v, (SaveLoad*)_veh_descs[vtype]);
switch (v->type) {
case VEH_TRAIN: v = new (v) Train(); break;