Files
@ r6722:b6eb38b08e9f
Branch filter:
Location: cpp/openttd-patchpack/source/src/newgrf_commons.cpp
r6722:b6eb38b08e9f
4.4 KiB
text/x-c
(svn r9954) -Fix [FS#811]: trolley AI crashed when trying to determine what the roadbits are.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | /* $Id$ */
/** @file newgrf_commons.cpp Implementation of the class OverrideManagerBase
* and its descendance, present and futur
*/
#include "stdafx.h"
#include "openttd.h"
#include "town.h"
#include "industry.h"
#include "newgrf.h"
#include "newgrf_commons.h"
/** Constructor of generic class
* @param offset end of original data for this entity. i.e: houses = 110
* @param maximum of entities this manager can deal with. i.e: houses = 512
* @param invalid is the ID used to identify an invalid entity id
*/
OverrideManagerBase::OverrideManagerBase(uint16 offset, uint16 maximum, uint16 invalid)
{
max_offset = offset;
max_new_entities = maximum;
invalid_ID = invalid;
mapping_ID = CallocT<EntityIDMapping>(max_new_entities);
entity_overrides = MallocT<uint16>(max_offset);
memset(entity_overrides, invalid, sizeof(entity_overrides));
}
/** Destructor of the generic class.
* Frees allocated memory of constructor
*/
OverrideManagerBase::~OverrideManagerBase()
{
free(mapping_ID);
free(entity_overrides);
}
/** Since the entity IDs defined by the GRF file does not necessarily correlate
* to those used by the game, the IDs used for overriding old entities must be
* translated when the entity spec is set.
* @param local_id id in grf file
* @param entity_type original entity type
*/
void OverrideManagerBase::Add(uint8 local_id, uint entity_type)
{
assert(entity_type < max_offset);
entity_overrides[entity_type] = local_id;
}
/** Resets the mapping, which is used while initializing game */
void OverrideManagerBase::ResetMapping()
{
memset(mapping_ID, 0, (max_new_entities - 1) * sizeof(EntityIDMapping));
}
/** Resets the override, which is used while initializing game */
void OverrideManagerBase::ResetOverride()
{
for (uint16 i = 0; i < max_offset; i++) {
entity_overrides[i] = invalid_ID;
}
}
/** Return the ID (if ever available) of a previously inserted entity.
* @param grf_local_id ID of this enity withing the grfID
* @param grfid ID of the grf file
* @return the ID of the candidate, of the Invalid flag item ID
*/
uint16 OverrideManagerBase::GetID(uint8 grf_local_id, uint32 grfid)
{
const EntityIDMapping *map;
for (uint16 id = max_offset; id < max_new_entities; id++) {
map = &mapping_ID[id];
if (map->entity_id == grf_local_id && map->grfid == grfid) {
return id;
}
}
return invalid_ID;
}
/** Reserves a place in the mapping array for an entity to be installed
* @param grf_local_id is an arbitrary id given by the grf's author. Also known as setid
* @param grfid is the id of the grf file itself
* @param substitute_id is the original entity from which data is copied for the new one
* @return the proper usable slot id, or invalid marker if none is found
*/
uint16 OverrideManagerBase::AddEntityID(byte grf_local_id, uint32 grfid, byte substitute_id)
{
uint16 id = this->GetID(grf_local_id, grfid);
EntityIDMapping *map;
/* Look to see if this entity has already been added. This is done
* separately from the loop below in case a GRF has been deleted, and there
* are any gaps in the array.
*/
if (id != invalid_ID) {
return id;
}
/* This entity hasn't been defined before, so give it an ID now. */
for (id = max_offset; id < max_new_entities; id++) {
map = &mapping_ID[id];
if (map->entity_id == 0 && map->grfid == 0) {
map->entity_id = grf_local_id;
map->grfid = grfid;
map->substitute_id = substitute_id;
return id;
}
}
return invalid_ID;
}
/** Gives the substitute of the entity, as specified by the grf file
* @param entity_id of the entity being queried
* @return mapped id
*/
uint16 OverrideManagerBase::GetSubstituteID(byte entity_id)
{
return mapping_ID[entity_id].substitute_id;
}
/** Install the specs into the HouseSpecs array
* It will find itself the proper slot onwhich it will go
* @param hs HouseSpec read from the grf file, ready for inclusion
*/
void HouseOverrideManager::SetEntitySpec(const HouseSpec *hs)
{
HouseID house_id = this->AddEntityID(hs->local_id, hs->grffile->grfid, hs->substitute_id);
if (house_id == invalid_ID) {
grfmsg(1, "House.SetEntitySpec: Too many houses allocated. Ignoring.");
return;
}
memcpy(&_house_specs[house_id], hs, sizeof(*hs));
/* Now add the overrides. */
for (int i = 0; i != max_offset; i++) {
HouseSpec *overridden_hs = GetHouseSpecs(i);
if (entity_overrides[i] != hs->local_id) continue;
overridden_hs->override = house_id;
entity_overrides[i] = invalid_ID;
}
}
|