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(svn r21986) -Codechange: Add helper function to test whether an engine is still associated to a GRF.

release/1.1
frosch 2011-02-05 20:37:00 +00:00
parent 2679051c68
commit faa2a26ae1
3 changed files with 12 additions and 2 deletions
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11
src/engine.cpp
View File

@ -144,6 +144,15 @@ Engine::~Engine()
free(this->name); free(this->name);
} }
/**
* Checks whether the engine spec is properly initialised.
* @return true if enabled
*/
bool Engine::IsEnabled() const
{
return this->info.string_id != STR_NEWGRF_INVALID_ENGINE;
}
/** /**
* Determines whether an engine can carry something. * Determines whether an engine can carry something.
* A vehicle cannot carry anything if its capacity is zero, or none of the possible cargos is available in the climate. * A vehicle cannot carry anything if its capacity is zero, or none of the possible cargos is available in the climate.
@ -935,7 +944,7 @@ bool IsEngineBuildable(EngineID engine, VehicleType type, CompanyID company)
/* check if it's available */ /* check if it's available */
if (!HasBit(e->company_avail, company)) return false; if (!HasBit(e->company_avail, company)) return false;
if (e->info.string_id == STR_NEWGRF_INVALID_ENGINE) return false; if (!e->IsEnabled()) return false;
if (type == VEH_TRAIN) { if (type == VEH_TRAIN) {
/* Check if the rail type is available to this company */ /* Check if the rail type is available to this company */

1
src/engine_base.h
View File

@ -61,6 +61,7 @@ struct Engine : EnginePool::PoolItem<&_engine_pool> {
Engine(); Engine();
Engine(VehicleType type, EngineID base); Engine(VehicleType type, EngineID base);
~Engine(); ~Engine();
bool IsEnabled() const;
/** /**
* Determines the default cargo type of an engine. * Determines the default cargo type of an engine.

2
src/strings.cpp
View File

@ -1110,7 +1110,7 @@ static char *FormatString(char *buff, const char *str_arg, int64 *argv, const in
assert(e != NULL); assert(e != NULL);
if (e->name != NULL && e->info.string_id != STR_NEWGRF_INVALID_ENGINE) { if (e->name != NULL && e->IsEnabled()) {
buff = strecpy(buff, e->name, last); buff = strecpy(buff, e->name, last);
} else { } else {
buff = GetStringWithArgs(buff, e->info.string_id, NULL, NULL, last); buff = GetStringWithArgs(buff, e->info.string_id, NULL, NULL, last);