fixed "Cannot open table" issue.

SerialCommDoc.cpp

@@ -303,14 +303,22 @@ CSerialCommDoc::workerLogRecord(CStringA strA, int flag, int lineNum) {
 	return boost::thread();
 }
 
-int checkTable(sqlite3 *db, char *tableName) {
-	int rc;
+int checkTable(char *dbName, char *tableName) {
+	sqlite3 *db;
 	char *zErrMsg = 0;
+	int rc;
 	const char* data = "Callback function called";
 
 	char *sql;
 	int len, len1 = 0;
 
+	rc = sqlite3_open(dbName, &db);
+
+	if (rc) {
+		fprintf_s(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
+		return(-3);
+	}
+
 	/// Create SQL statement
 	char *sql1 = "SELECT * from ";
 	len1 = strlen(sql1);
@@ -329,9 +337,11 @@ int checkTable(sqlite3 *db, char *tableName) {
 	if (rc != SQLITE_OK) {
 		fprintf_s(stderr, "SQL error: %s\n", zErrMsg);
 		sqlite3_free(zErrMsg);
-		return(-1);
+		return(-4);
 	}
 
+	sqlite3_close(db);
+
 	return 0;
 }
 
@@ -348,21 +358,20 @@ int CSerialCommDoc::checkDB(char *dbName, char *tableName) {
 		fprintf_s(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
 		return(-1);
 	}
-	else {
-		if (checkTable(db, tableName) != 0)
-			return(-2);
-		else {
-			/// Assignment to member variables
-			len_db = strlen(dbName) + 1;
-			m_dbName = (char *)malloc(len_db);
-			strcpy_s(m_dbName, len_db, dbName);
-			len_table = strlen(tableName) + 1;
-			m_tableName = (char *)malloc(len_table);
-			strcpy_s(m_tableName, len_table, tableName);
-		}
-	}
 
 	sqlite3_close(db);
 
+	if (checkTable(dbName, tableName) != 0)
+		return(-2);
+	else {
+		/// Assignment to member variables
+		len_db = strlen(dbName) + 1;
+		m_dbName = (char *)malloc(len_db);
+		strcpy_s(m_dbName, len_db, dbName);
+		len_table = strlen(tableName) + 1;
+		m_tableName = (char *)malloc(len_table);
+		strcpy_s(m_tableName, len_table, tableName);
+	}
+
 	return 0;
 }