From 811fe47d52fd21726bd16710afcf30d44ee7e8a6 Mon Sep 17 00:00:00 2001 From: Fabian Meyer <3982806+meyfa@users.noreply.github.com> Date: Thu, 27 Jun 2024 22:54:44 +0200 Subject: [PATCH] feat: Extract proper registry data from vanilla datapack (#195) Finally, the entire world is a plains biome! Jokes aside, what this patch does is as follows: It expands the amount of data extracted from the official server to include the vanilla datapack registries, and adds code to parse them at run-time from the file system. This means the application now has a much better understanding of the knowledge shared by both the server and client. For instance, when upgrading to a new version of Minecraft, I would previously have to capture the flow of Registry Data packets from a real server, which CobolCraft would then re-play as a blob. Any data within that packet, such as biome IDs or chat message types, would need to be hard-coded where they were needed, since the server-side aspects of the data would simply be missing. Now, with the "--server" flag added in the Makefile, JSON files are exported for every vanilla registry entry. Using newly-implemented C++ routines to obtain directory listings (why is this not part of GnuCOBOL?), the registries can be filled in at run-time. The Registry Data packet now sends the actual data instead of an opaque blob. As a proof-of-concept, the new methods are used to lookup the "minecraft:plains" biome at chunk allocation such that we get a much nicer tint of the environment (compared to "minecraft:badlands", which happened to be the default ID 0 when using the blob). --- Dockerfile | 1 + Makefile | 14 +- blobs/registry_packets.txt | 219 -------------------------------- cpp/cobolcraft_util.cpp | 61 +++++++++ cpp/cobolcraft_util.h | 18 +++ src/copybooks/DD-REGISTRIES.cpy | 1 + src/copybooks/DD-WORLD.cpy | 4 + src/datapack.cob | 104 +++++++++++++++ src/packets/chunkdata.cob | 7 +- src/packets/registry.cob | 81 ++++++------ src/registries.cob | 118 +++++++++++++++++ src/server.cob | 58 ++++++++- src/world.cob | 15 ++- 13 files changed, 430 insertions(+), 271 deletions(-) delete mode 100644 blobs/registry_packets.txt create mode 100644 src/datapack.cob diff --git a/Dockerfile b/Dockerfile index 777e335..78c3d68 100644 --- a/Dockerfile +++ b/Dockerfile @@ -35,6 +35,7 @@ COPY --from=build cobolcraft . COPY --from=build *.so . COPY --from=build blobs ./blobs COPY --from=build data/generated/reports/*.json ./data/generated/reports/ +COPY --from=build data/generated/data ./data/generated/data # Include runtime dependencies ENV COB_PRE_LOAD=CBL_GC_SOCKET:COBOLCRAFT_UTIL diff --git a/Makefile b/Makefile index 2bb9ef9..16622b3 100644 --- a/Makefile +++ b/Makefile @@ -15,7 +15,8 @@ CPY = $(wildcard src/copybooks/*.cpy) BIN = cobolcraft # Data extraction from Mojang's server.jar -JSON_DATA = data/generated/reports/registries.json data/generated/reports/blocks.json +SERVER_URL = https://piston-data.mojang.com/v1/objects/450698d1863ab5180c25d7c804ef0fe6369dd1ba/server.jar +SERVER_JAR_EXTRACTED = data/versions/1.21/server-1.21.jar # Test sources and binary TEST_SRC = test.cob $(wildcard tests/*.cob) @@ -23,7 +24,7 @@ TEST_BIN = test .PHONY: all clean data run test -all: $(BIN) $(SOCKET_LIB) $(UTIL_LIB) $(JSON_DATA) +all: $(BIN) $(SOCKET_LIB) $(UTIL_LIB) data clean: rm -rf $(OBJECTS_DIR) @@ -32,8 +33,9 @@ clean: rm -f $(UTIL_LIB) rm -f $(TEST_BIN) rm -f $(JSON_DATA) + rm -rf data -data: $(JSON_DATA) +data: $(SERVER_JAR_EXTRACTED) run: all COB_PRE_LOAD=CBL_GC_SOCKET:COBOLCRAFT_UTIL ./$(BIN) @@ -45,10 +47,10 @@ $(SOCKET_LIB): $(UTIL_LIB): cpp/cobolcraft_util.cpp g++ -shared -Wall -O2 -fPIC -lz -o $@ $< -$(JSON_DATA): +$(SERVER_JAR_EXTRACTED): mkdir -p data - curl -o data/server.jar https://piston-data.mojang.com/v1/objects/450698d1863ab5180c25d7c804ef0fe6369dd1ba/server.jar - cd data && java -DbundlerMainClass="net.minecraft.data.Main" -jar server.jar --reports + curl -o data/server.jar $(SERVER_URL) + cd data && java -DbundlerMainClass="net.minecraft.data.Main" -jar server.jar --reports --server $(OBJECTS): out/%.o: src/%.cob $(CPY) @mkdir -p $(@D) diff --git a/blobs/registry_packets.txt b/blobs/registry_packets.txt deleted file mode 100644 index 1b0b644..0000000 --- a/blobs/registry_packets.txt +++ /dev/null @@ -1,219 +0,0 @@ -9d0c07186d696e6563726166743a776f726c6467656e2f62696f6d6540126d69 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long long *handle) +{ + static char buffer[65536]; + if (!path || !path_length || *path_length == 0 || *path_length >= sizeof(buffer)) + { + return ERRNO_PARAMS; + } + memcpy(buffer, path, *path_length); + buffer[*path_length] = '\0'; + DIR *dir; + if ((dir = opendir(buffer)) == NULL) + { + return ERRNO_SYSTEM; + } + *handle = (unsigned long long)dir; + return 0; +} + +EXTERN_DECL int ReadDirectory(unsigned long long *handle, char *entry) +{ + if (!handle || !entry) + { + return ERRNO_PARAMS; + } + DIR *dir = (DIR *)(*handle); + struct dirent *result; + do + { + result = readdir(dir); + if (result == NULL) + { + return ERRNO_SYSTEM; + } + } while (strcmp(result->d_name, ".") == 0 || strcmp(result->d_name, "..") == 0); + // Invariant: entry is at least 255 bytes long - but it will be space-padded instead of null-terminated. + size_t length = strlen(result->d_name); + if (length > 255) + { + length = 255; + } + memcpy(entry, result->d_name, length); + memset(entry + length, ' ', 255 - length); + return 0; +} + +EXTERN_DECL int CloseDirectory(unsigned long long *handle) +{ + if (!handle) + { + return ERRNO_PARAMS; + } + DIR *dir = (DIR *)(*handle); + if (closedir(dir) != 0) + { + return ERRNO_SYSTEM; + } + return 0; +} + EXTERN_DECL int ZlibCompress(char *decompressed, unsigned long *decompressed_length, char *compressed, unsigned long *compressed_length) { if (!decompressed || !decompressed_length || !compressed || !compressed_length) diff --git a/cpp/cobolcraft_util.h b/cpp/cobolcraft_util.h index efa3df2..5bb677a 100644 --- a/cpp/cobolcraft_util.h +++ b/cpp/cobolcraft_util.h @@ -26,6 +26,24 @@ EXTERN_DECL int ReadConsole(char *buffer, unsigned long *count); */ EXTERN_DECL int LeadingZeros32(unsigned long *value, unsigned long *count); +/** + * Open a directory for reading (e.g., to obtain a directory listing). The first parameter is the directory path; the + * second parameter is its length; the third parameter is the resulting directory handle (as a 64-bit integer). + */ +EXTERN_DECL int OpenDirectory(char *path, unsigned long *path_length, unsigned long long *handle); + +/** + * Read the next entry in a directory listing. The first parameter is the directory handle; the second parameter is + * the resulting entry name, which must be pre-allocated by the caller with at least 255 bytes capacity. The entry + * name will be padded with trailing spaces for names shorter than 255 bytes. The entries "." and ".." are skipped. + */ +EXTERN_DECL int ReadDirectory(unsigned long long *handle, char *entry); + +/** + * Close a directory handle. + */ +EXTERN_DECL int CloseDirectory(unsigned long long *handle); + /** * Compress a buffer using zlib (deflate). The compressed length indicates the size of the compressed buffer; after compression, * it contains the actual size of the compressed data. diff --git a/src/copybooks/DD-REGISTRIES.cpy b/src/copybooks/DD-REGISTRIES.cpy index c8988e9..3a31c24 100644 --- a/src/copybooks/DD-REGISTRIES.cpy +++ b/src/copybooks/DD-REGISTRIES.cpy @@ -4,6 +4,7 @@ 02 REGISTRY OCCURS 100 TIMES. 03 REGISTRY-NAME PIC X(100). 03 REGISTRY-ID BINARY-LONG UNSIGNED. + 03 REGISTRY-REQUIRES-PACKET BINARY-CHAR UNSIGNED. 03 REGISTRY-ENTRIES-COUNT BINARY-LONG UNSIGNED. 03 REGISTRY-ENTRY OCCURS 2000 TIMES. 04 REGISTRY-ENTRY-NAME PIC X(100). diff --git a/src/copybooks/DD-WORLD.cpy b/src/copybooks/DD-WORLD.cpy index eb6df81..a47ac9c 100644 --- a/src/copybooks/DD-WORLD.cpy +++ b/src/copybooks/DD-WORLD.cpy @@ -19,6 +19,10 @@ 04 WORLD-SECTION-BLOCKS. 05 WORLD-BLOCK OCCURS 4096 TIMES. 06 WORLD-BLOCK-ID BINARY-LONG UNSIGNED. + *> section biome ID + *> TODO: This is kind of a hack, just to get a default "plains" biome instead of whatever is added first to + *> the biome registry (usually badlands). We should have a separate biome array. + 04 WORLD-SECTION-BIOME-ID BINARY-LONG UNSIGNED. 03 WORLD-BLOCK-ENTITY-COUNT BINARY-LONG UNSIGNED. *> block entity IDs for each block 03 WORLD-BLOCK-ENTITIES. diff --git a/src/datapack.cob b/src/datapack.cob new file mode 100644 index 0000000..6122fca --- /dev/null +++ b/src/datapack.cob @@ -0,0 +1,104 @@ +*> --- Datapack-Load --- +*> Load registry contents from a datapack path. +IDENTIFICATION DIVISION. +PROGRAM-ID. Datapack-Load. + +DATA DIVISION. +WORKING-STORAGE SECTION. + 01 REGISTRY-COUNT BINARY-LONG UNSIGNED. + 01 REGISTRY-INDEX BINARY-LONG UNSIGNED. + 01 REGISTRY-NAME PIC X(255). +LINKAGE SECTION. + 01 LK-ROOT-PATH PIC X ANY LENGTH. + 01 LK-PACK-NAME PIC X ANY LENGTH. + 01 LK-FAILURE BINARY-CHAR UNSIGNED. + +PROCEDURE DIVISION USING LK-ROOT-PATH LK-PACK-NAME LK-FAILURE. + *> For each known registry, load the contents from the datapack (if it exists). + CALL "Registries-GetCount" USING REGISTRY-COUNT + PERFORM VARYING REGISTRY-INDEX FROM 1 BY 1 UNTIL REGISTRY-INDEX > REGISTRY-COUNT + CALL "Registries-Iterate-Name" USING REGISTRY-INDEX REGISTRY-NAME + *> We want to remove the "minecraft:" prefix from registry names to match the directory structure + IF REGISTRY-NAME(1:10) = "minecraft:" + CALL "Datapack-Load-Registry" USING LK-ROOT-PATH LK-PACK-NAME REGISTRY-NAME(11:) REGISTRY-INDEX LK-FAILURE + IF LK-FAILURE NOT = 0 + GOBACK + END-IF + END-IF + END-PERFORM + + GOBACK. + + IDENTIFICATION DIVISION. + PROGRAM-ID. Datapack-Load-Registry. + + DATA DIVISION. + WORKING-STORAGE SECTION. + 01 DIR-PATH PIC X(255). + 01 DIR-PATH-LENGTH BINARY-LONG UNSIGNED. + 01 DIR-HANDLE PIC X(8). + 01 EOF BINARY-CHAR UNSIGNED. + 01 DIR-ENTRY PIC X(255). + 01 ENTRY-ID BINARY-LONG UNSIGNED. + 01 ENTRY-NAME PIC X(255). + 01 CHAR-INDEX BINARY-LONG UNSIGNED. + LINKAGE SECTION. + 01 LK-ROOT-PATH PIC X ANY LENGTH. + 01 LK-PACK-NAME PIC X ANY LENGTH. + 01 LK-REGISTRY-NAME PIC X ANY LENGTH. + 01 LK-REGISTRY-INDEX BINARY-LONG UNSIGNED. + 01 LK-FAILURE BINARY-CHAR UNSIGNED. + + PROCEDURE DIVISION USING LK-ROOT-PATH LK-PACK-NAME LK-REGISTRY-NAME LK-REGISTRY-INDEX LK-FAILURE. + INITIALIZE DIR-PATH + STRING + FUNCTION TRIM(LK-ROOT-PATH) + FUNCTION TRIM(LK-PACK-NAME) + "/" + FUNCTION TRIM(LK-REGISTRY-NAME) + DELIMITED BY SIZE INTO DIR-PATH + END-STRING + MOVE FUNCTION STORED-CHAR-LENGTH(DIR-PATH) TO DIR-PATH-LENGTH + + CALL "OpenDirectory" USING DIR-PATH DIR-PATH-LENGTH DIR-HANDLE GIVING LK-FAILURE + IF LK-FAILURE NOT = 0 + *> The directory is likely missing, which isn't an error. + MOVE 0 TO LK-FAILURE + GOBACK + END-IF + + *> The entry protocol IDs will be numbered starting from the registry length. + CALL "Registries-GetRegistryLength" USING LK-REGISTRY-INDEX ENTRY-ID + + PERFORM UNTIL EXIT + CALL "ReadDirectory" USING DIR-HANDLE DIR-ENTRY GIVING EOF + IF EOF NOT = 0 + EXIT PERFORM + END-IF + + *> Prepend the namespace and remove the file extension + INITIALIZE ENTRY-NAME + STRING + FUNCTION TRIM(LK-PACK-NAME) + ":" + FUNCTION TRIM(DIR-ENTRY) + DELIMITED BY SIZE INTO ENTRY-NAME + END-STRING + PERFORM VARYING CHAR-INDEX FROM 1 BY 1 UNTIL CHAR-INDEX > FUNCTION STORED-CHAR-LENGTH(ENTRY-NAME) + IF ENTRY-NAME(CHAR-INDEX:1) = "." + MOVE SPACES TO ENTRY-NAME(CHAR-INDEX:) + END-IF + END-PERFORM + + *> Register the entry + CALL "Registries-CreateEntry" USING LK-REGISTRY-INDEX ENTRY-NAME ENTRY-ID + ADD 1 TO ENTRY-ID + END-PERFORM + + CALL "CloseDirectory" USING DIR-HANDLE + + GOBACK. + + END PROGRAM Datapack-Load-Registry. + +END PROGRAM Datapack-Load. diff --git a/src/packets/chunkdata.cob b/src/packets/chunkdata.cob index 86fbc28..c26a443 100644 --- a/src/packets/chunkdata.cob +++ b/src/packets/chunkdata.cob @@ -32,6 +32,7 @@ LINKAGE SECTION. *> block IDs (16x16x16) - X increases fastest, then Z, then Y 03 LK-BLOCK OCCURS 4096 TIMES. 04 LK-BLOCK-ID BINARY-LONG UNSIGNED. + 03 LK-BIOME-ID BINARY-LONG UNSIGNED. 02 LK-CHUNK-BLOCK-ENTITY-COUNT BINARY-LONG UNSIGNED. *> block entity IDs for each block 02 LK-CHUNK-BLOCK-ENTITIES. @@ -177,6 +178,7 @@ PROCEDURE DIVISION USING LK-CLIENT LK-CHUNK. 02 LK-NON-AIR BINARY-LONG UNSIGNED. 02 LK-BLOCK OCCURS 4096 TIMES. 03 LK-BLOCK-ID BINARY-LONG UNSIGNED. + 02 LK-BIOME-ID BINARY-LONG UNSIGNED. 01 LK-BUFFER PIC X ANY LENGTH. 01 LK-BUFFERPOS BINARY-LONG UNSIGNED. @@ -223,9 +225,8 @@ PROCEDURE DIVISION USING LK-CLIENT LK-CHUNK. MOVE X"00" TO LK-BUFFER(LK-BUFFERPOS:1) ADD 1 TO LK-BUFFERPOS *> - palette: id of the biome - *> TODO: use plains biome - MOVE 0 TO INT32 - CALL "Encode-VarInt" USING INT32 LK-BUFFER LK-BUFFERPOS + *> TODO: use actual biome data + CALL "Encode-VarInt" USING LK-BIOME-ID LK-BUFFER LK-BUFFERPOS *> - data array length: 0, since we have a single-valued palette MOVE 0 TO INT32 CALL "Encode-VarInt" USING INT32 LK-BUFFER LK-BUFFERPOS diff --git a/src/packets/registry.cob b/src/packets/registry.cob index 0bea0f5..400dc44 100644 --- a/src/packets/registry.cob +++ b/src/packets/registry.cob @@ -1,52 +1,51 @@ IDENTIFICATION DIVISION. PROGRAM-ID. SendPacket-Registry. -ENVIRONMENT DIVISION. -INPUT-OUTPUT SECTION. -FILE-CONTROL. -SELECT FD-REGISTRY-BLOB ASSIGN TO "blobs/registry_packets.txt" - ORGANIZATION IS LINE SEQUENTIAL. - DATA DIVISION. -FILE SECTION. - FD FD-REGISTRY-BLOB. - 01 REGISTRY-BLOB-REC PIC X(64). WORKING-STORAGE SECTION. - COPY DD-CLIENTS. - 01 HNDL PIC X(4). - 01 ERRNO PIC 9(3). - 01 HEX PIC X(64). - 01 HEXLEN BINARY-LONG UNSIGNED. - 01 BUFFER PIC X(32). - 01 BUFFERLEN BINARY-LONG UNSIGNED. + 01 PACKET-ID BINARY-LONG VALUE H'07'. + *> buffer used to store the packet data + 01 PAYLOAD PIC X(60000). + 01 PAYLOADPOS BINARY-LONG UNSIGNED. + 01 PAYLOADLEN BINARY-LONG UNSIGNED. + *> temporary data + 01 REGISTRY-NAME PIC X(255). + 01 REGISTRY-ENTRY-COUNT BINARY-LONG UNSIGNED. + 01 REGISTRY-ENTRY-INDEX BINARY-LONG UNSIGNED. + 01 REGISTRY-ENTRY-NAME PIC X(255). + 01 INT32 BINARY-LONG. LINKAGE SECTION. - 01 LK-CLIENT BINARY-LONG UNSIGNED. - -PROCEDURE DIVISION USING LK-CLIENT. - *> Don't send packet if the client is already in an error state. It will be disconnected on the next tick. - IF CLIENT-ERRNO-SEND(LK-CLIENT) NOT = 0 - EXIT PROGRAM - END-IF - MOVE CLIENT-HNDL(LK-CLIENT) TO HNDL - - OPEN INPUT FD-REGISTRY-BLOB - MOVE 64 TO HEXLEN - PERFORM UNTIL HEXLEN = 0 - MOVE SPACES TO HEX(1:64) - READ FD-REGISTRY-BLOB INTO HEX - AT END - MOVE 0 TO HEXLEN - NOT AT END - CALL "DecodeHexString" USING HEX HEXLEN BUFFER BUFFERLEN - CALL "Socket-Write" USING HNDL ERRNO BUFFERLEN BUFFER - IF ERRNO NOT = 0 - MOVE 0 TO HEXLEN - MOVE ERRNO TO CLIENT-ERRNO-SEND(LK-CLIENT) - END-IF - END-READ + 01 LK-CLIENT BINARY-LONG UNSIGNED. + 01 LK-REGISTRY-INDEX BINARY-LONG UNSIGNED. + +PROCEDURE DIVISION USING LK-CLIENT LK-REGISTRY-INDEX. + MOVE 1 TO PAYLOADPOS + + *> registry name + CALL "Registries-Iterate-Name" USING LK-REGISTRY-INDEX REGISTRY-NAME + MOVE FUNCTION STORED-CHAR-LENGTH(REGISTRY-NAME) TO INT32 + CALL "Encode-String" USING REGISTRY-NAME INT32 PAYLOAD PAYLOADPOS + + *> entry count + CALL "Registries-GetRegistryLength" USING LK-REGISTRY-INDEX REGISTRY-ENTRY-COUNT + CALL "Encode-VarInt" USING REGISTRY-ENTRY-COUNT PAYLOAD PAYLOADPOS + + *> entries + PERFORM VARYING REGISTRY-ENTRY-INDEX FROM 1 BY 1 UNTIL REGISTRY-ENTRY-INDEX > REGISTRY-ENTRY-COUNT + *> TODO: This assumes that entries are sorted by protocol ID. This is the case for all registries that we care + *> about with this packet, but shouldn't be relied upon. + CALL "Registries-Iterate-EntryName" USING LK-REGISTRY-INDEX REGISTRY-ENTRY-INDEX REGISTRY-ENTRY-NAME + MOVE FUNCTION STORED-CHAR-LENGTH(REGISTRY-ENTRY-NAME) TO INT32 + CALL "Encode-String" USING REGISTRY-ENTRY-NAME INT32 PAYLOAD PAYLOADPOS + + *> has data (always false) + MOVE X"00" TO PAYLOAD(PAYLOADPOS:1) + ADD 1 TO PAYLOADPOS END-PERFORM - CLOSE FD-REGISTRY-BLOB + *> send packet + COMPUTE PAYLOADLEN = PAYLOADPOS - 1 + CALL "SendPacket" USING LK-CLIENT PACKET-ID PAYLOAD PAYLOADLEN GOBACK. END PROGRAM SendPacket-Registry. diff --git a/src/registries.cob b/src/registries.cob index 5fa5380..acb8e19 100644 --- a/src/registries.cob +++ b/src/registries.cob @@ -53,6 +53,7 @@ PROCEDURE DIVISION USING LK-JSON LK-JSON-LEN LK-FAILURE. 01 LK-REGISTRY BINARY-LONG UNSIGNED. PROCEDURE DIVISION USING LK-JSON LK-OFFSET LK-FAILURE LK-REGISTRY. + MOVE 0 TO REGISTRY-REQUIRES-PACKET(LK-REGISTRY) MOVE 0 TO REGISTRY-ENTRIES-COUNT(LK-REGISTRY) *> Read the registry name. @@ -197,6 +198,85 @@ PROCEDURE DIVISION USING LK-JSON LK-JSON-LEN LK-FAILURE. END PROGRAM Registries-Parse. +*> --- Registries-Create --- +*> Create a new, empty registry. The registry's protocol ID will be the current highest ID + 1. +IDENTIFICATION DIVISION. +PROGRAM-ID. Registries-Create. + +DATA DIVISION. +WORKING-STORAGE SECTION. + 01 REGISTRY-LOOP-INDEX BINARY-LONG UNSIGNED. + 01 MAX-REGISTRY-ID BINARY-LONG UNSIGNED. + *> shared data + COPY DD-REGISTRIES. +LINKAGE SECTION. + 01 LK-REGISTRY-NAME PIC X ANY LENGTH. + 01 LK-PACKET-REQUIRED BINARY-CHAR UNSIGNED. + +PROCEDURE DIVISION USING LK-REGISTRY-NAME LK-PACKET-REQUIRED. + *> On the first call, determine the current highest protocol ID. + IF MAX-REGISTRY-ID = 0 + PERFORM VARYING REGISTRY-LOOP-INDEX FROM 1 BY 1 UNTIL REGISTRY-LOOP-INDEX > REGISTRIES-COUNT + IF REGISTRY-ID(REGISTRY-LOOP-INDEX) > MAX-REGISTRY-ID + MOVE REGISTRY-ID(REGISTRY-LOOP-INDEX) TO MAX-REGISTRY-ID + END-IF + END-PERFORM + END-IF + + *> Assign the new protocol ID. + ADD 1 TO MAX-REGISTRY-ID + + *> Create the new registry. + ADD 1 TO REGISTRIES-COUNT + MOVE LK-REGISTRY-NAME TO REGISTRY-NAME(REGISTRIES-COUNT) + MOVE MAX-REGISTRY-ID TO REGISTRY-ID(REGISTRIES-COUNT) + MOVE LK-PACKET-REQUIRED TO REGISTRY-REQUIRES-PACKET(REGISTRIES-COUNT) + MOVE 0 TO REGISTRY-ENTRIES-COUNT(REGISTRIES-COUNT) + + GOBACK. + +END PROGRAM Registries-Create. + +*> --- Registries-CreateEntry --- +*> Create a new entry in a registry. +IDENTIFICATION DIVISION. +PROGRAM-ID. Registries-CreateEntry. + +DATA DIVISION. +WORKING-STORAGE SECTION. + *> shared data + COPY DD-REGISTRIES. +LINKAGE SECTION. + 01 LK-REGISTRY-INDEX BINARY-LONG UNSIGNED. + 01 LK-ENTRY-NAME PIC X ANY LENGTH. + 01 LK-ENTRY-ID BINARY-LONG. + +PROCEDURE DIVISION USING LK-REGISTRY-INDEX LK-ENTRY-NAME LK-ENTRY-ID. + ADD 1 TO REGISTRY-ENTRIES-COUNT(LK-REGISTRY-INDEX) + MOVE LK-ENTRY-NAME TO REGISTRY-ENTRY-NAME(LK-REGISTRY-INDEX, REGISTRY-ENTRIES-COUNT(LK-REGISTRY-INDEX)) + MOVE LK-ENTRY-ID TO REGISTRY-ENTRY-ID(LK-REGISTRY-INDEX, REGISTRY-ENTRIES-COUNT(LK-REGISTRY-INDEX)) + GOBACK. + +END PROGRAM Registries-CreateEntry. + +*> --- Registries-GetCount --- +*> Get the number of registries. +IDENTIFICATION DIVISION. +PROGRAM-ID. Registries-GetCount. + +DATA DIVISION. +WORKING-STORAGE SECTION. + *> shared data + COPY DD-REGISTRIES. +LINKAGE SECTION. + 01 LK-REGISTRY-COUNT BINARY-LONG UNSIGNED. + +PROCEDURE DIVISION USING LK-REGISTRY-COUNT. + MOVE REGISTRIES-COUNT TO LK-REGISTRY-COUNT + GOBACK. + +END PROGRAM Registries-GetCount. + *> --- Registries-GetRegistryIndex --- *> Get the index of a registry by its name for faster access. IDENTIFICATION DIVISION. @@ -240,6 +320,44 @@ PROCEDURE DIVISION USING LK-REGISTRY-INDEX LK-REGISTRY-LENGTH. END PROGRAM Registries-GetRegistryLength. +*> --- Registries-Iterate-Name --- +*> Get the name of a registry by its index. +IDENTIFICATION DIVISION. +PROGRAM-ID. Registries-Iterate-Name. + +DATA DIVISION. +WORKING-STORAGE SECTION. + *> shared data + COPY DD-REGISTRIES. +LINKAGE SECTION. + 01 LK-REGISTRY-INDEX BINARY-LONG UNSIGNED. + 01 LK-REGISTRY-NAME PIC X ANY LENGTH. + +PROCEDURE DIVISION USING LK-REGISTRY-INDEX LK-REGISTRY-NAME. + MOVE REGISTRY-NAME(LK-REGISTRY-INDEX) TO LK-REGISTRY-NAME + GOBACK. + +END PROGRAM Registries-Iterate-Name. + +*> --- Registries-Iterate-ReqPacket --- +*> Get whether a registry requires a packet by its index. +IDENTIFICATION DIVISION. +PROGRAM-ID. Registries-Iterate-ReqPacket. + +DATA DIVISION. +WORKING-STORAGE SECTION. + *> shared data + COPY DD-REGISTRIES. +LINKAGE SECTION. + 01 LK-REGISTRY-INDEX BINARY-LONG UNSIGNED. + 01 LK-REQUIRES-PACKET BINARY-CHAR UNSIGNED. + +PROCEDURE DIVISION USING LK-REGISTRY-INDEX LK-REQUIRES-PACKET. + MOVE REGISTRY-REQUIRES-PACKET(LK-REGISTRY-INDEX) TO LK-REQUIRES-PACKET + GOBACK. + +END PROGRAM Registries-Iterate-ReqPacket. + *> --- Registries-Iterate-EntryName --- *> Get the name of an entry by its index. IDENTIFICATION DIVISION. diff --git a/src/server.cob b/src/server.cob index 03e87ff..757ca07 100644 --- a/src/server.cob +++ b/src/server.cob @@ -8,8 +8,20 @@ WORKING-STORAGE SECTION. *> File names 01 FILE-REGISTRIES PIC X(255) VALUE "data/generated/reports/registries.json". 01 FILE-BLOCKS PIC X(255) VALUE "data/generated/reports/blocks.json". + 01 FILE-DATAPACK-ROOT PIC X(255) VALUE "data/generated/data/". *> Constants COPY DD-CLIENT-STATES. + 01 C-MINECRAFT-WORLDGEN-BIOME PIC X(50) VALUE "minecraft:worldgen/biome". + 01 C-MINECRAFT-CHAT_TYPE PIC X(50) VALUE "minecraft:chat_type". + 01 C-MINECRAFT-TRIM_PATTERN PIC X(50) VALUE "minecraft:trim_pattern". + 01 C-MINECRAFT-TRIM_MATERIAL PIC X(50) VALUE "minecraft:trim_material". + 01 C-MINECRAFT-WOLF_VARIANT PIC X(50) VALUE "minecraft:wolf_variant". + 01 C-MINECRAFT-PAINTING_VARIANT PIC X(50) VALUE "minecraft:painting_variant". + 01 C-MINECRAFT-DIMENSION_TYPE PIC X(50) VALUE "minecraft:dimension_type". + 01 C-MINECRAFT-DAMAGE_TYPE PIC X(50) VALUE "minecraft:damage_type". + 01 C-MINECRAFT-BANNER_PATTERN PIC X(50) VALUE "minecraft:banner_pattern". + 01 C-MINECRAFT-ENCHANTMENT PIC X(50) VALUE "minecraft:enchantment". + 01 C-MINECRAFT-JUKEBOX_SONG PIC X(50) VALUE "minecraft:jukebox_song". 01 C-MINECRAFT-ITEM PIC X(50) VALUE "minecraft:item". 01 C-COLOR-YELLOW PIC X(16) VALUE "yellow". *> The server sends (2 * VIEW-DISTANCE + 1) * (2 * VIEW-DISTANCE + 1) chunks around the player. @@ -73,6 +85,9 @@ WORKING-STORAGE SECTION. 01 CHUNK-END-Z BINARY-LONG. 01 PREV-CENTER-CHUNK-X BINARY-LONG. 01 PREV-CENTER-CHUNK-Z BINARY-LONG. + *> Variables used for datapack loading + 01 VANILLA-DATAPACK-NAME PIC X(50) VALUE "minecraft". + 01 REGISTRY-COUNT BINARY-LONG UNSIGNED. *> Variables used for item registration 01 REGISTRY-INDEX BINARY-LONG. 01 REGISTRY-LENGTH BINARY-LONG UNSIGNED. @@ -108,6 +123,21 @@ LoadRegistries. DISPLAY "Failed to parse registries" STOP RUN END-IF + + *> Create additional registries not exported by the report generator. + *> Set the flag to 1 to indicate that they need to be part of a Registry Data packet sent to the client. + MOVE 1 TO TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-WORLDGEN-BIOME TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-CHAT_TYPE TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-TRIM_PATTERN TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-TRIM_MATERIAL TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-WOLF_VARIANT TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-PAINTING_VARIANT TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-DIMENSION_TYPE TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-DAMAGE_TYPE TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-BANNER_PATTERN TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-ENCHANTMENT TEMP-INT8 + CALL "Registries-Create" USING C-MINECRAFT-JUKEBOX_SONG TEMP-INT8 . LoadBlocks. @@ -124,6 +154,26 @@ LoadBlocks. END-IF . +LoadDatapack. + DISPLAY "Loading vanilla datapack" + CALL "Datapack-Load" USING FILE-DATAPACK-ROOT VANILLA-DATAPACK-NAME DATA-FAILURE + IF DATA-FAILURE NOT = 0 + DISPLAY "Failed to load datapack" + STOP RUN + END-IF + + *> Sanity check: There shouldn't be any empty registries now. + CALL "Registries-GetCount" USING REGISTRY-COUNT + PERFORM VARYING REGISTRY-INDEX FROM 1 BY 1 UNTIL REGISTRY-INDEX > REGISTRY-COUNT + CALL "Registries-GetRegistryLength" USING REGISTRY-INDEX REGISTRY-LENGTH + IF REGISTRY-LENGTH <= 0 + CALL "Registries-Iterate-Name" USING REGISTRY-INDEX TEMP-IDENTIFIER + DISPLAY "Error: Empty registry '" FUNCTION TRIM(TEMP-IDENTIFIER) "'!" + STOP RUN + END-IF + END-PERFORM + . + RegisterItems. DISPLAY "Registering items" @@ -742,7 +792,13 @@ HandleConfiguration SECTION. *> Send configuration packets CALL "SendPacket-FeatureFlags" USING CLIENT-ID CALL "SendPacket-KnownPacks" USING CLIENT-ID - CALL "SendPacket-Registry" USING CLIENT-ID + CALL "Registries-GetCount" USING REGISTRY-COUNT + PERFORM VARYING REGISTRY-INDEX FROM 1 BY 1 UNTIL REGISTRY-INDEX > REGISTRY-COUNT + CALL "Registries-Iterate-ReqPacket" USING REGISTRY-INDEX TEMP-INT8 + IF TEMP-INT8 = 1 + CALL "SendPacket-Registry" USING CLIENT-ID REGISTRY-INDEX + END-IF + END-PERFORM CALL "SendPacket-UpdateTags" USING CLIENT-ID *> Send finish configuration diff --git a/src/world.cob b/src/world.cob index 1fddbaf..52ffe60 100644 --- a/src/world.cob +++ b/src/world.cob @@ -33,8 +33,12 @@ PROGRAM-ID. World-AllocateChunk. DATA DIVISION. WORKING-STORAGE SECTION. + *> Constants + 01 C-MINECRAFT-WORLDGEN-BIOME PIC X(50) VALUE "minecraft:worldgen/biome". + 01 C-MINECRAFT-PLAINS PIC X(50) VALUE "minecraft:plains". + *> Temporary variables + 01 BIOME-ID BINARY-LONG UNSIGNED. 01 SECTION-INDEX BINARY-LONG UNSIGNED. - 01 BLOCK-INDEX BINARY-LONG UNSIGNED. *> World data COPY DD-WORLD. LINKAGE SECTION. @@ -56,6 +60,14 @@ PROCEDURE DIVISION USING LK-CHUNK-X LK-CHUNK-Z LK-CHUNK-INDEX. MOVE LK-CHUNK-X TO WORLD-CHUNK-X(LK-CHUNK-INDEX) MOVE LK-CHUNK-Z TO WORLD-CHUNK-Z(LK-CHUNK-INDEX) INITIALIZE WORLD-BLOCK-ENTITIES(LK-CHUNK-INDEX) REPLACING NUMERIC BY -1 + + *> Set all sections to the plains biome + *> TODO: This is a hack. We should have a proper biome system. + CALL "Registries-Get-EntryId" USING C-MINECRAFT-WORLDGEN-BIOME C-MINECRAFT-PLAINS BIOME-ID + PERFORM VARYING SECTION-INDEX FROM 1 BY 1 UNTIL SECTION-INDEX > WORLD-SECTION-COUNT + MOVE BIOME-ID TO WORLD-SECTION-BIOME-ID(LK-CHUNK-INDEX, SECTION-INDEX) + END-PERFORM + GOBACK. END PROGRAM World-AllocateChunk. @@ -1004,6 +1016,7 @@ LINKAGE SECTION. PROCEDURE DIVISION USING LK-FAILURE. MOVE 0 TO SAVE-REQUIRED + MOVE 0 TO LK-FAILURE *> Load the world metadata CALL "World-LoadLevel" USING IO-FAILURE