增加db/Field等定义

inc/hgl/db/Field.h

@@ -0,0 +1,98 @@
+#ifndef HGL_DB_FIELD_INCLUDE
+#define HGL_DB_FIELD_INCLUDE
+
+#include<hgl/db/FieldType.h>
+namespace hgl
+{
+    namespace db
+    {
+        /**
+         * 字段基类
+         */
+        class Field
+        {
+            FieldType *field_type;
+
+        public:
+
+            const FieldType *GetFieldType()const{return field_type;}                         ///<获取字段类型
+
+        public:
+
+            Field(FieldType *ft):field_type(ft){}
+            virtual ~Field()
+            {
+                if(field_type)
+                    delete field_type;
+            }
+        };//class Field
+
+        /**
+         * 单个数据字段模板基类
+         */
+        template<typename T> class FieldSingleValue:public Field
+        {
+        public:
+
+            using Field::Field;
+            virtual ~FieldSingleValue()=default;
+        };//template<typename T> class FieldSingleValue:public Field
+
+        class FieldArrayBase:public Field
+        {
+        protected:
+
+            FieldArrayType *array_type;
+
+        public:
+
+            FieldArrayBase(FieldArrayType *fa):Field(fa),array_type(fa){}
+            virtual ~FieldArrayBase()=default;
+
+            const FieldBaseType GetMemberType   ()const{return array_type?array_type->GetMemberType():FieldBaseType::ERROR_TYPE;}
+            const uint64        GetLength       ()const{return array_type?array_type->GetLength():-1;}
+        };//class FieldVarArray:public Field
+
+        template<typename T> class FieldArray:public FieldArrayBase
+        {
+        public:
+
+            using FieldArrayBase::FieldArrayBase;
+            virtual ~FieldArray()=default;
+        };//template<typename T> class FieldArray:public FieldArrayBase
+
+        #define FIELD_TYPE_DEFINE(type_name,type)   using Field##type_name=FieldSingleValue<type>;  \
+                                                    using Field##type_name##Array=FieldArray<type>;
+
+            FIELD_TYPE_DEFINE(Bool,     bool)
+
+            FIELD_TYPE_DEFINE(Int8,     int8)
+            FIELD_TYPE_DEFINE(Int16,    int16)
+            FIELD_TYPE_DEFINE(Int32,    int32)
+            FIELD_TYPE_DEFINE(Int64,    int64)
+
+            FIELD_TYPE_DEFINE(Uint8,    uint8)
+            FIELD_TYPE_DEFINE(Uint16,   uint16)
+            FIELD_TYPE_DEFINE(Uint32,   uint32)
+            FIELD_TYPE_DEFINE(Uint64,   uint64)
+
+            FIELD_TYPE_DEFINE(Float,    float)
+            FIELD_TYPE_DEFINE(Double,   double)
+
+            FIELD_TYPE_DEFINE(Char,     char)
+            FIELD_TYPE_DEFINE(UTF16,    u16char)
+
+        #undef FIELD_TYPE_DEFINE
+
+        class FieldStruct:public Field
+        {
+            FieldStructType *struct_type;
+
+        public:
+
+            FieldStruct(FieldStructType *fs):Field(fs),struct_type(fs){}
+            virtual ~FieldStruct()=default;
+        };//class FieldStruct:public Field
+    }//namespace db
+}//namespace hgl
+#endif//HGL_DB_FIELD_INCLUDE