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Improve performance of string lookup in AddGRFString

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This commit is contained in:
Jonathan G Rennison
2022-05-30 23:51:44 +01:00
parent 9a131a90ca
commit d71e38446e
3 changed files with 35 additions and 12 deletions
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14
src/newgrf.cpp
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@@ -451,6 +451,17 @@ GRFFile *GetFileByGRFID(uint32 grfid)
return nullptr;
}
/**
* Obtain a NewGRF file by its grfID, expect it to usually be the current GRF's grfID
* @param grfid The grfID to obtain the file for
* @return The file.
*/
GRFFile *GetFileByGRFIDExpectCurrent(uint32 grfid)
{
if (_cur.grffile->grfid == grfid) return _cur.grffile;
return GetFileByGRFID(grfid);
}
/**
* Obtain a NewGRF file by its filename
* @param filename The filename to obtain the file for.
@@ -11943,6 +11954,9 @@ void LoadNewGRF(uint load_index, uint num_baseset)
/* Pseudo sprite processing is finished; free temporary stuff */
_cur.ClearDataForNextFile();
for (GRFFile * const file : _grf_files) {
file->string_map.clear();
}
/* Call any functions that should be run after GRFs have been loaded. */
AfterLoadGRFs();

2
src/newgrf.h
View File

@@ -348,6 +348,8 @@ struct GRFFile : ZeroedMemoryAllocator {
byte ctrl_flags; ///< General GRF control flags
btree::btree_map<uint16, uint> string_map; ///< Map of local GRF string ID to string ID
GRFFile(const struct GRFConfig *config);
~GRFFile();

31
src/newgrf_text.cpp
View File

@@ -573,23 +573,30 @@ StringID AddGRFString(uint32 grfid, uint16 stringid, byte langid_to_add, bool ne
}
uint id;
for (id = 0; id < _num_grf_texts; id++) {
if (_grf_text[id].grfid == grfid && _grf_text[id].stringid == stringid) {
break;
}
}
extern GRFFile *GetFileByGRFIDExpectCurrent(uint32 grfid);
GRFFile *grf = GetFileByGRFIDExpectCurrent(grfid);
if (grf == nullptr) return STR_EMPTY;
/* Too many strings allocated, return empty */
if (id == lengthof(_grf_text)) {
_grf_bug_too_many_strings = true;
return STR_EMPTY;
auto iter = grf->string_map.lower_bound(stringid);
if (iter != grf->string_map.end() && iter->first == stringid) {
/* Found */
id = iter->second;
} else {
/* Allocate new ID */
id = _num_grf_texts;
/* Too many strings allocated, return empty */
if (id == lengthof(_grf_text)) {
_grf_bug_too_many_strings = true;
return STR_EMPTY;
}
grf->string_map.insert(iter, std::make_pair(stringid, id));
_num_grf_texts++;
}
std::string newtext = TranslateTTDPatchCodes(grfid, langid_to_add, allow_newlines, text_to_add);
/* If we didn't find our stringid and grfid in the list, allocate a new id */
if (id == _num_grf_texts) _num_grf_texts++;
if (_grf_text[id].textholder.empty()) {
_grf_text[id].grfid = grfid;
_grf_text[id].stringid = stringid;