Change lzf to handle values larger than UINT32_MAX (#9776)

Redis supports inserting data over 4GB into string (and recently for lists too, see #9357),
But LZF compression used in RDB files (see `rdbcompression` config), and in quicklist
(see `list-compress-depth` config) does not support compress/decompress data over
UINT32_MAX, which will result in corrupting the rdb after compression.

Internal changes:
1. Modify the `unsigned int` parameter of `lzf_compress/lzf_decompress` to `size_t`.
2. Modify the variable types in `lzf_compress` involving offsets and lengths to `size_t`.
3. Set LZF_USE_OFFSETS to 0.
    When LZF_USE_OFFSETS is 1, lzf store offset into `LZF_HSLOT`(32bit). 
    Even in 64-bit, `LZF_USE_OFFSETS` defaults to 1, because lzf assumes that it only
    compresses and decompresses data smaller than UINT32_MAX.
    But now we need to make lzf support 64-bit, turning on `LZF_USE_OFFSETS` will make
    it impossible to store 64-bit offsets or pointers.
    BTW, disable LZF_USE_OFFSETS also brings a few performance improvements.

Tests:
1. Add test for compress/decompress string large than UINT32_MAX.
2. Add unittest for compress/decompress quicklistNode.

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/unit/bitops.tcl b/tests/unit/bitops.tcl
index 1a3c3a54e..89431c81f 100644
--- a/tests/unit/bitops.tcl
+++ b/tests/unit/bitops.tcl
@@ -566,4 +566,18 @@ start_server {tags {"bitops"}} {
         r config set proto-max-bulk-len $oldval
         r del mykey
     } {1} {large-memory}
+
+    test "SETBIT values larger than UINT32_MAX and lzf_compress/lzf_decompress correctly" {
+        set bytes [expr (1 << 32) + 1]
+        set bitpos [expr (1 << 35)]
+        set oldval [lindex [r config get proto-max-bulk-len] 1]
+        r config set proto-max-bulk-len $bytes
+        r setbit mykey $bitpos 1
+        assert_equal $bytes [r strlen mykey]
+        assert_equal 1 [r getbit mykey $bitpos]
+        r debug reload ;# lzf_compress/lzf_decompress when RDB saving/loading.
+        assert_equal 1 [r getbit mykey $bitpos]
+        r config set proto-max-bulk-len $oldval
+        r del mykey
+    } {1} {large-memory needs:debug}
 }