diff options
| -rw-r--r-- | src/oldloader.cpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/oldloader.cpp b/src/oldloader.cpp index 9c59f1e16..75dc8e5db 100644 --- a/src/oldloader.cpp +++ b/src/oldloader.cpp @@ -372,6 +372,7 @@ static bool _new_ttdpatch_format; static uint32 _old_town_index; static uint16 _old_string_id; static uint16 _old_string_id_2; +static uint16 _old_extra_chunk_nums; static void ReadTTDPatchFlags(void) { @@ -397,6 +398,8 @@ static void ReadTTDPatchFlags(void) /* Check if we have a modern TTDPatch savegame (has extra data all around) */ _new_ttdpatch_format = (memcmp(&_old_map3[0x1FFFA], "TTDp", 4) == 0); + _old_extra_chunk_nums = _old_map3[_new_ttdpatch_format ? 0x1FFFE : 0x2]; + /* Clean the misused places */ for (i = 0; i < 17; i++) _old_map3[i] = 0; for (i = 0x1FE00; i < 0x20000; i++) _old_map3[i] = 0; @@ -1345,6 +1348,59 @@ static bool LoadOldMapPart2(LoadgameState *ls, int num) return !ls->failed; } +static bool LoadTTDPatchExtraChunks(LoadgameState *ls, int num) +{ + ReadTTDPatchFlags(); + + DEBUG(oldloader, 2, "Found %d extra chunk(s)", _old_extra_chunk_nums); + + for (int i = 0; i != _old_extra_chunk_nums; i++) { + uint16 id = ReadUint16(ls); + uint32 len = ReadUint32(ls); + + switch (id) { + /* List of GRFIDs, used in the savegame + * They are saved in a 'GRFID:4 active:1' format, 5 bytes for each entry */ + case 0x2: + case 0x8004: { + /* Skip the first element: TTDP hack for the Action D special variables FFFF0000 01 */ + ReadUint32(ls); ReadByte(ls); len -= 5; + + ClearGRFConfigList(&_grfconfig); + GRFConfig *c = CallocT<GRFConfig>(1); + while (len != 0) { + uint32 grfid = ReadUint32(ls); + + if (ReadByte(ls) == 1) { + c->grfid = grfid; + c->filename = "TTDP game, no information"; + + AppendToGRFConfigList(&_grfconfig, c); + DEBUG(oldloader, 3, "TTDPatch game using GRF file with GRFID %0X", BSWAP32(c->grfid)); + } + len -= 5; + }; + free(c); + + /* Append static NewGRF configuration */ + AppendStaticGRFConfigs(&_grfconfig); + } break; + case 0x3: { /* TTDPatch version and configuration */ + uint32 ttdpv = ReadUint32(ls); + DEBUG(oldloader, 3, "Game saved with TTDPatch version %d.%d.%d r%d", GB(ttdpv, 24, 8), GB(ttdpv, 20, 4), GB(ttdpv, 16, 4), GB(ttdpv, 0, 16)); + len -= 4; + while (len-- != 0) ReadByte(ls); // skip the configuration + } break; + default: + DEBUG(oldloader, 4, "Skipping unknown extra chunk %X", id); + while (len-- != 0) ReadByte(ls); + break; + } + } + + return !ls->failed; +} + static uint32 _old_cur_town_ctr; static const OldChunks main_chunk[] = { OCL_ASSERT( 0 ), @@ -1458,6 +1514,7 @@ static const OldChunks main_chunk[] = { OCL_ASSERT( 0x97179 ), /* Below any (if available) extra chunks from TTDPatch can follow */ + OCL_CHUNK(1, LoadTTDPatchExtraChunks), OCL_END() }; |