more TDB

source/libs/tdb/src/db/tdbDb.c

@@ -69,6 +69,11 @@ int tdbDbClose(STDb *pDb) {
   return 0;
 }
 
+int tdbDbDrop(STDb *pDb) {
+  // TODO
+  return 0;
+}
+
 int tdbDbInsert(STDb *pDb, const void *pKey, int keyLen, const void *pVal, int valLen) {
   // TODO
   return 0;

source/libs/tdb/src/db/tdbPFile.c

@@ -31,10 +31,16 @@ struct SPFile {
   u8       inTran;
 };
 
-typedef struct {
-  /* TODO */
+typedef struct __attribute__((__packed__)) {
+  u8    hdrString[16];
+  u16   pageSize;
+  SPgno freePage;
+  u32   nFreePages;
+  u8    reserved[102];
 } SFileHdr;
 
+TDB_STATIC_ASSERT(sizeof(SFileHdr) == 128, "Size of file header is not correct");
+
 static int tdbPFileReadPage(SPFile *pFile, SPage *pPage);
 
 int tdbPFileOpen(SPCache *pCache, const char *fileName, SPFile **ppFile) {

source/libs/tdb/src/inc/tdbDb.h

@@ -24,6 +24,7 @@ typedef struct STDb STDb;
 
 int tdbDbOpen(const char *fname, int keyLen, int valLen, FKeyComparator keyCmprFn, STEnv *pEnv, STDb **ppDb);
 int tdbDbClose(STDb *pDb);
+int tdbDbDrop(STDb *pDb);
 int tdbDbInsert(STDb *pDb, const void *pKey, int keyLen, const void *pVal, int valLen);
 
 #ifdef __cplusplus

source/libs/tdb/test/tdbTest.cpp

@@ -15,9 +15,14 @@ TEST(tdb_test, simple_test) {
   ret = tdbDbOpen("db.db", TDB_VARIANT_LEN, TDB_VARIANT_LEN, NULL, pEnv, &pDb);
   GTEST_ASSERT_EQ(ret, 0);
 
-  // Insert some data
-  ret = tdbDbInsert(pDb, "1", 1, "world", 5);
-  GTEST_ASSERT_EQ(ret, 0);
+  // // Insert some data
+  // ret = tdbDbInsert(pDb, "1", 1, "world", 5);
+  // GTEST_ASSERT_EQ(ret, 0);
+
+  ret = tdbDbDrop(pDb);
+  if (pDb == NULL) {
+    return -1;
+  }
 
   // Close a database
   tdbDbClose(pDb);