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(svn r15646) -Fix: Be lenient on users who do stupid things like loading newgrfs statically, which modify engine names, while dynamic_engines is enabled or the to be modified engine is not (yet) present.

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frosch 2009-03-08 18:08:30 +00:00
parent 959c297fb9
commit fd1609fd11
1 changed files with 17 additions and 4 deletions
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17
src/newgrf.cpp
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@ -324,7 +324,15 @@ static void SetNewGRFOverride(uint32 source_grfid, uint32 target_grfid)
grfmsg(5, "SetNewGRFOverride: Added override of 0x%X to 0x%X", BSWAP32(source_grfid), BSWAP32(target_grfid));
}
static Engine *GetNewEngine(const GRFFile *file, VehicleType type, uint16 internal_id)
/**
* Returns the engine associated to a certain internal_id, resp. allocates it.
* @param file NewGRF that wants to change the engine
* @param type Vehicle type
* @param internal_id Engine ID inside the NewGRF
* @param static_access If the engine is not present, return NULL instead of allocating a new engine. (Used for static Action 0x04)
* @return The requested engine
*/
static Engine *GetNewEngine(const GRFFile *file, VehicleType type, uint16 internal_id, bool static_access = false)
{
/* Hack for add-on GRFs that need to modify another GRF's engines. This lets
* them use the same engine slots. */
@ -359,12 +367,16 @@ static Engine *GetNewEngine(const GRFFile *file, VehicleType type, uint16 intern
}
/* Reserve the engine slot */
if (!static_access) {
EngineIDMapping *eid = _engine_mngr.Get(engine);
eid->grfid = scope_grfid; // Note: this is INVALID_GRFID if dynamic_engines is disabled, so no reservation
}
return e;
}
if (static_access) return NULL;
uint engine_pool_size = GetEnginePoolSize();
/* ... it's not, so create a new one based off an existing engine */
@ -3443,7 +3455,8 @@ static void FeatureNewName(byte *buf, size_t len)
case GSF_SHIP:
case GSF_AIRCRAFT:
if (!generic) {
Engine *e = GetNewEngine(_cur_grffile, (VehicleType)feature, id);
Engine *e = GetNewEngine(_cur_grffile, (VehicleType)feature, id, HasBit(_cur_grfconfig->flags, GCF_STATIC));
if (e == NULL) break;
StringID string = AddGRFString(_cur_grffile->grfid, e->index, lang, new_scheme, name, e->info.string_id);
e->info.string_id = string;
} else {