fix:add tools to get tmq offset

utils/test/c/CMakeLists.txt

@@ -5,6 +5,14 @@ add_executable(create_table createTable.c)
 add_executable(tmq_taosx_ci tmq_taosx_ci.c)
 add_executable(sml_test sml_test.c)
 add_executable(get_db_name_test get_db_name_test.c)
+add_executable(tmq_offset tmqOffset.c)
+target_link_libraries(
+    tmq_offset
+    PUBLIC taos_static
+    PUBLIC util
+    PUBLIC common
+    PUBLIC os
+)
 target_link_libraries(
     create_table
     PUBLIC taos_static

utils/test/c/tmqOffset.c

@@ -0,0 +1,64 @@
+//
+// Created by mingming wanng on 2023/4/7.
+//
+#include <stdio.h>
+#include <stdlib.h>
+#include "taoserror.h"
+#include "tlog.h"
+#include "tmsg.h"
+
+typedef struct {
+  int32_t size;
+} STqOffsetHead;
+
+int32_t tqOffsetRestoreFromFile(const char* fname) {
+  TdFilePtr pFile = taosOpenFile(fname, TD_FILE_READ);
+  if (pFile != NULL) {
+    STqOffsetHead head = {0};
+    int32_t       code;
+
+    while (1) {
+      if ((code = taosReadFile(pFile, &head, sizeof(STqOffsetHead))) != sizeof(STqOffsetHead)) {
+        if (code == 0) {
+          break;
+        } else {
+          printf("code:%d != 0\n", code);
+          return -1;
+        }
+      }
+      int32_t size = htonl(head.size);
+      void*   memBuf = taosMemoryCalloc(1, size);
+      if (memBuf == NULL) {
+        printf("memBuf == NULL\n");
+        return -1;
+      }
+      if ((code = taosReadFile(pFile, memBuf, size)) != size) {
+        taosMemoryFree(memBuf);
+        printf("code:%d != size:%d\n", code, size);
+        return -1;
+      }
+      STqOffset offset;
+      SDecoder  decoder;
+      tDecoderInit(&decoder, memBuf, size);
+      if (tDecodeSTqOffset(&decoder, &offset) < 0) {
+        taosMemoryFree(memBuf);
+        tDecoderClear(&decoder);
+        printf("tDecodeSTqOffset error\n");
+        return -1;
+      }
+
+      tDecoderClear(&decoder);
+      printf("subkey:%s, type:%d, uid/version:%lld, ts:%lld\n",
+             offset.subKey, offset.val.type, offset.val.uid, offset.val.ts);
+      taosMemoryFree(memBuf);
+    }
+
+    taosCloseFile(&pFile);
+  }
+  return 0;
+}
+
+int main(int argc, char *argv[]) {
+  tqOffsetRestoreFromFile("offset-ver0");
+  return 0;
+}