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Saveload: Add mechanism for custom handling of missing table fields

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This commit is contained in:
Jonathan G Rennison
2024-07-13 00:49:37 +01:00
parent 07afb0e00b
commit 10c136f039
2 changed files with 10 additions and 2 deletions
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4
src/sl/saveload.cpp
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@@ -2208,7 +2208,7 @@ static uint8_t GetSavegameTableFileType(const SaveLoad &sld)
* @param slt The NamedSaveLoad table with objects to save/load.
* @return The ordered SaveLoad array to use.
*/
std::vector<SaveLoad> SlTableHeader(const NamedSaveLoadTable &slt)
std::vector<SaveLoad> SlTableHeader(const NamedSaveLoadTable &slt, TableHeaderSpecialHandler *special_handler)
{
/* You can only use SlTableHeader if you are a CH_TABLE. */
assert(_sl.block_mode == CH_TABLE || _sl.block_mode == CH_SPARSE_TABLE);
@@ -2255,6 +2255,8 @@ std::vector<SaveLoad> SlTableHeader(const NamedSaveLoadTable &slt)
auto sld_it = std::lower_bound(key_lookup.begin(), key_lookup.end(), key);
if (sld_it == key_lookup.end() || sld_it->name != key) {
if (special_handler != nullptr && special_handler->MissingField(key, type, saveloads)) continue; // Special handler took responsibility for missing field
/* SLA_LOADCHECK triggers this debug statement a lot and is perfectly normal. */
DEBUG(sl, _sl.action == SLA_LOAD ? 2 : 6, "Field '%s' of type 0x%02X not found, skipping", key.c_str(), type);

8
src/sl/saveload.h
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@@ -1071,9 +1071,15 @@ void SlObjectSaveFiltered(void *object, const SaveLoadTable &slt);
void SlObjectLoadFiltered(void *object, const SaveLoadTable &slt);
void SlObjectPtrOrNullFiltered(void *object, const SaveLoadTable &slt);
struct TableHeaderSpecialHandler {
virtual ~TableHeaderSpecialHandler() {}
virtual bool MissingField(const std::string &key, uint8_t type, std::vector<SaveLoad> &saveloads) { return false; } // By default, do not handle
};
bool SlIsTableChunk();
void SlSkipTableHeader();
std::vector<SaveLoad> SlTableHeader(const NamedSaveLoadTable &slt);
std::vector<SaveLoad> SlTableHeader(const NamedSaveLoadTable &slt, TableHeaderSpecialHandler *special_handler = nullptr);
std::vector<SaveLoad> SlTableHeaderOrRiff(const NamedSaveLoadTable &slt);
void SlSaveTableObjectChunk(const SaveLoadTable &slt);
void SlLoadTableOrRiffFiltered(const SaveLoadTable &slt);