DBG: add dbdecompress helper command

src/dbg/commands/cmd-undocumented.cpp

@@ -501,4 +501,23 @@ bool cbInstrAnimateWait(int argc, char* argv[])
         Sleep(1);
     }
     return true;
+}
+
+#include <lz4/lz4file.h>
+
+bool cbInstrDbdecompress(int argc, char* argv[])
+{
+    if(argc < 2)
+    {
+        dprintf_untranslated("Usage: dbdecompress \"c:\\path\\to\\db\"\n");
+        return false;
+    }
+    auto dbFile = StringUtils::Utf8ToUtf16(argv[1]);
+    if(LZ4_decompress_fileW(dbFile.c_str(), dbFile.c_str()) != LZ4_SUCCESS)
+    {
+        dprintf_untranslated("Failed to decompress '%s'\n", argv[1]);
+        return false;
+    }
+    dprintf_untranslated("Decompressed '%s'\n", argv[1]);
+    return true;
 }

src/dbg/commands/cmd-undocumented.h

@@ -13,4 +13,5 @@ bool cbInstrMeminfo(int argc, char* argv[]);
 bool cbInstrBriefcheck(int argc, char* argv[]);
 bool cbInstrFocusinfo(int argc, char* argv[]);
 bool cbInstrFlushlog(int argc, char* argv[]);
-bool cbInstrAnimateWait(int argc, char* argv[]);
+bool cbInstrAnimateWait(int argc, char* argv[]);
+bool cbInstrDbdecompress(int argc, char* argv[]);

src/dbg/x64dbg.cpp

@@ -442,6 +442,7 @@ static void registercommands()
     dbgcmdnew("printstack,logstack", cbInstrPrintStack, true); //print the call stack
     dbgcmdnew("flushlog", cbInstrFlushlog, false); //flush the log
     dbgcmdnew("AnimateWait", cbInstrAnimateWait, true); //Wait for the debuggee to pause.
+    dbgcmdnew("dbdecompress", cbInstrDbdecompress, false); //Decompress a database.
 };
 
 bool cbCommandProvider(char* cmd, int maxlen)