1 files changed, 170 insertions, 0 deletions

diff --git a/examples/redis-unstable/src/rdb.h b/examples/redis-unstable/src/rdb.h
new file mode 100644
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+++ b/examples/redis-unstable/src/rdb.h
@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 2009-Present, Redis Ltd.
+ * All rights reserved.
+ *
+ * Licensed under your choice of (a) the Redis Source Available License 2.0
+ * (RSALv2); or (b) the Server Side Public License v1 (SSPLv1); or (c) the
+ * GNU Affero General Public License v3 (AGPLv3).
+ */
+
+#ifndef __RDB_H
+#define __RDB_H
+
+#include <stdio.h>
+#include "rio.h"
+
+/* TBD: include only necessary headers. */
+#include "server.h"
+
+/* The current RDB version. When the format changes in a way that is no longer
+ * backward compatible this number gets incremented. */
+#define RDB_VERSION 13
+
+/* Defines related to the dump file format. To store 32 bits lengths for short
+ * keys requires a lot of space, so we check the most significant 2 bits of
+ * the first byte to interpreter the length:
+ *
+ * 00|XXXXXX => if the two MSB are 00 the len is the 6 bits of this byte
+ * 01|XXXXXX XXXXXXXX =>  01, the len is 14 bits, 6 bits + 8 bits of next byte
+ * 10|000000 [32 bit integer] => A full 32 bit len in net byte order will follow
+ * 10|000001 [64 bit integer] => A full 64 bit len in net byte order will follow
+ * 11|OBKIND this means: specially encoded object will follow. The six bits
+ *           number specify the kind of object that follows.
+ *           See the RDB_ENC_* defines.
+ *
+ * Lengths up to 63 are stored using a single byte, most DB keys, and may
+ * values, will fit inside. */
+#define RDB_6BITLEN 0
+#define RDB_14BITLEN 1
+#define RDB_32BITLEN 0x80
+#define RDB_64BITLEN 0x81
+#define RDB_ENCVAL 3
+#define RDB_LENERR UINT64_MAX
+
+/* When a length of a string object stored on disk has the first two bits
+ * set, the remaining six bits specify a special encoding for the object
+ * accordingly to the following defines: */
+#define RDB_ENC_INT8 0        /* 8 bit signed integer */
+#define RDB_ENC_INT16 1       /* 16 bit signed integer */
+#define RDB_ENC_INT32 2       /* 32 bit signed integer */
+#define RDB_ENC_LZF 3         /* string compressed with FASTLZ */
+
+/* Map object types to RDB object types. Macros starting with OBJ_ are for
+ * memory storage and may change. Instead RDB types must be fixed because
+ * we store them on disk. */
+#define RDB_TYPE_STRING 0
+#define RDB_TYPE_LIST   1
+#define RDB_TYPE_SET    2
+#define RDB_TYPE_ZSET   3
+#define RDB_TYPE_HASH   4
+#define RDB_TYPE_ZSET_2 5 /* ZSET version 2 with doubles stored in binary. */
+#define RDB_TYPE_MODULE_PRE_GA 6 /* Used in 4.0 release candidates */
+#define RDB_TYPE_MODULE_2 7 /* Module value with annotations for parsing without
+                               the generating module being loaded. */
+#define RDB_TYPE_HASH_ZIPMAP    9
+#define RDB_TYPE_LIST_ZIPLIST  10
+#define RDB_TYPE_SET_INTSET    11
+#define RDB_TYPE_ZSET_ZIPLIST  12
+#define RDB_TYPE_HASH_ZIPLIST  13
+#define RDB_TYPE_LIST_QUICKLIST 14
+#define RDB_TYPE_STREAM_LISTPACKS 15
+#define RDB_TYPE_HASH_LISTPACK 16
+#define RDB_TYPE_ZSET_LISTPACK 17
+#define RDB_TYPE_LIST_QUICKLIST_2   18
+#define RDB_TYPE_STREAM_LISTPACKS_2 19
+#define RDB_TYPE_SET_LISTPACK  20
+#define RDB_TYPE_STREAM_LISTPACKS_3 21
+#define RDB_TYPE_HASH_METADATA_PRE_GA 22      /* Hash with HFEs. Doesn't attach min TTL at start (7.4 RC) */
+#define RDB_TYPE_HASH_LISTPACK_EX_PRE_GA 23   /* Hash LP with HFEs. Doesn't attach min TTL at start (7.4 RC) */
+#define RDB_TYPE_HASH_METADATA 24             /* Hash with HFEs. Attach min TTL at start */
+#define RDB_TYPE_HASH_LISTPACK_EX 25          /* Hash LP with HFEs. Attach min TTL at start */
+#define RDB_TYPE_STREAM_LISTPACKS_4 26        /* Stream with IDMP support */
+/* NOTE: WHEN ADDING NEW RDB TYPE, UPDATE rdbIsObjectType(), and rdb_type_string[] */
+
+/* Test if a type is an object type. */
+#define rdbIsObjectType(t) (((t) >= 0 && (t) <= 7) || ((t) >= 9 && (t) <= 26))
+
+/* Special RDB opcodes (saved/loaded with rdbSaveType/rdbLoadType). */
+#define RDB_OPCODE_KEY_META   243   /* Key metadata (module metadata classes). */
+#define RDB_OPCODE_SLOT_INFO  244   /* Individual slot info, such as slot id and size (cluster mode only). */
+#define RDB_OPCODE_FUNCTION2  245   /* function library data */
+#define RDB_OPCODE_FUNCTION_PRE_GA   246   /* old function library data for 7.0 rc1 and rc2 */
+#define RDB_OPCODE_MODULE_AUX 247   /* Module auxiliary data. */
+#define RDB_OPCODE_IDLE       248   /* LRU idle time. */
+#define RDB_OPCODE_FREQ       249   /* LFU frequency. */
+#define RDB_OPCODE_AUX        250   /* RDB aux field. */
+#define RDB_OPCODE_RESIZEDB   251   /* Hash table resize hint. */
+#define RDB_OPCODE_EXPIRETIME_MS 252    /* Expire time in milliseconds. */
+#define RDB_OPCODE_EXPIRETIME 253       /* Old expire time in seconds. */
+#define RDB_OPCODE_SELECTDB   254   /* DB number of the following keys. */
+#define RDB_OPCODE_EOF        255   /* End of the RDB file. */
+
+/* Module serialized values sub opcodes */
+#define RDB_MODULE_OPCODE_EOF   0   /* End of module value. */
+#define RDB_MODULE_OPCODE_SINT  1   /* Signed integer. */
+#define RDB_MODULE_OPCODE_UINT  2   /* Unsigned integer. */
+#define RDB_MODULE_OPCODE_FLOAT 3   /* Float. */
+#define RDB_MODULE_OPCODE_DOUBLE 4  /* Double. */
+#define RDB_MODULE_OPCODE_STRING 5  /* String. */
+
+/* rdbLoad...() functions flags. */
+#define RDB_LOAD_NONE     0
+#define RDB_LOAD_ENC      (1<<0)
+#define RDB_LOAD_PLAIN    (1<<1)
+#define RDB_LOAD_SDS      (1<<2)
+
+/* flags on the purpose of rdb save or load */
+#define RDBFLAGS_NONE 0                 /* No special RDB loading or saving. */
+#define RDBFLAGS_AOF_PREAMBLE (1<<0)    /* Load/save the RDB as AOF preamble. */
+#define RDBFLAGS_REPLICATION (1<<1)     /* Load/save for SYNC. */
+#define RDBFLAGS_ALLOW_DUP (1<<2)       /* Allow duplicated keys when loading.*/
+#define RDBFLAGS_FEED_REPL (1<<3)       /* Feed replication stream when loading.*/
+#define RDBFLAGS_KEEP_CACHE (1<<4)      /* Don't reclaim cache after rdb file is generated */
+
+/* When rdbLoadObject() returns NULL, the err flag is
+ * set to hold the type of error that occurred */
+#define RDB_LOAD_ERR_EMPTY_KEY       1   /* Error of empty key */
+#define RDB_LOAD_ERR_OTHER           2   /* Any other errors */
+
+ssize_t rdbWriteRaw(rio *rdb, void *p, size_t len);
+int rdbSaveType(rio *rdb, unsigned char type);
+int rdbLoadType(rio *rdb);
+time_t rdbLoadTime(rio *rdb);
+int rdbSaveLen(rio *rdb, uint64_t len);
+ssize_t rdbSaveMillisecondTime(rio *rdb, long long t);
+long long rdbLoadMillisecondTime(rio *rdb, int rdbver);
+uint64_t rdbLoadLen(rio *rdb, int *isencoded);
+int rdbLoadLenByRef(rio *rdb, int *isencoded, uint64_t *lenptr);
+int rdbSaveObjectType(rio *rdb, robj *o);
+int rdbLoadObjectType(rio *rdb);
+int rdbLoadWithEmptyFunc(char *filename, rdbSaveInfo *rsi, int rdbflags, void (*emptyDbFunc)(void));
+int rdbLoad(char *filename, rdbSaveInfo *rsi, int rdbflags);
+int rdbSaveBackground(int req, char *filename, rdbSaveInfo *rsi, int rdbflags);
+int rdbSaveToSlavesSockets(int req, rdbSaveInfo *rsi);
+void rdbRemoveTempFile(pid_t childpid, int from_signal);
+int rdbSaveToFile(const char *filename);
+int rdbSave(int req, char *filename, rdbSaveInfo *rsi, int rdbflags);
+ssize_t rdbSaveObject(rio *rdb, robj *o, robj *key, int dbid);
+size_t rdbSavedObjectLen(robj *o, robj *key, int dbid);
+robj *rdbLoadObject(int rdbtype, rio *rdb, sds key, int dbid, int *error);
+void backgroundSaveDoneHandler(int exitcode, int bysignal);
+int rdbSaveKeyValuePair(rio *rdb, robj *key, robj *val, long long expiretime,int dbid);
+ssize_t rdbSaveSingleModuleAux(rio *rdb, int when, moduleType *mt);
+robj *rdbLoadCheckModuleValue(rio *rdb, char *modulename);
+int rdbResolveKeyType(rio *rdb, int *type, int dbid, KeyMetaSpec *keymeta);
+robj *rdbLoadStringObject(rio *rdb);
+ssize_t rdbSaveStringObject(rio *rdb, robj *obj);
+ssize_t rdbSaveRawString(rio *rdb, unsigned char *s, size_t len);
+void *rdbGenericLoadStringObject(rio *rdb, int flags, size_t *lenptr);
+int rdbSaveBinaryDoubleValue(rio *rdb, double val);
+int rdbLoadBinaryDoubleValue(rio *rdb, double *val);
+int rdbSaveBinaryFloatValue(rio *rdb, float val);
+int rdbLoadBinaryFloatValue(rio *rdb, float *val);
+int rdbLoadRio(rio *rdb, int rdbflags, rdbSaveInfo *rsi);
+int rdbLoadRioWithLoadingCtx(rio *rdb, int rdbflags, rdbSaveInfo *rsi, rdbLoadingCtx *rdb_loading_ctx);
+int rdbFunctionLoad(rio *rdb, int ver, functionsLibCtx* lib_ctx, int rdbflags, sds *err);
+int rdbSaveRio(int req, rio *rdb, int *error, int rdbflags, rdbSaveInfo *rsi);
+ssize_t rdbSaveFunctions(rio *rdb);
+rdbSaveInfo *rdbPopulateSaveInfo(rdbSaveInfo *rsi);
+
+#endif