mcowrap.h

extremeDB s sample code,useful for you

  uint2                     event_id_new;
  uint2                     event_id_delete;
  uint2                     event_id_delete_all;
}
mco_dict_class_info_t;


typedef struct mco_dict_event_t_
{
  uint2                     class_code;
  uint2                     flags;      
  
#if defined(MCO_PLATFORM_X64) && defined(MCO_LONG_OBJECTS)
												/**< MCO_DB_EVENT_T_...                       */
  mco_puint                     field_offset;   /**< for update event                         */
#else //MCO_PLATFORM_X64_MCO_LONG_OBJECTS
												/**< MCO_DB_EVENT_T_...                       */
  uint4		                    field_offset;   /**< for update event                         */
#endif //MCO_PLATFORM_X64_MCO_LONG_OBJECTS
  uint2                     field_size;         /**< of the field, 0 when statically unknown  */
  uint1                     field_type;         /**< MCO_DB_FLDTYPE_E                         */
  uint1                     reserved;           
}
mco_dict_event_t;

/**
    Dictionary structure
 */
typedef struct mco_dictionary_t_ 
{
  const char            **  str_class_names;    /**< debug mode only */
  const char            **  str_index_names;    /**< debug mode only */

  uint2                     version_major;
  uint2                     version_minor;
  uint2                     version_build;
  uint2                     magic_number;

  uint2                     oid_is_supported;
  uint2                     auto_oid_supported; /**< HA support */

  /* counters: */
  uint2                     n_class_codes;      /**< class_codes start from 1. n_class_codes == last_classcode */
  uint2                     n_list_indexes;     /**< information only */
  uint2                     n_autoid_indexes;   /**< information only */
  uint2                     n_history_indexes;  /**< information only */
  uint2                     max_numof_indexes_per_obj;  /**< for rollback segment estimation */
  uint2                     n_structs;          /**< length of v_all_struct */
  uint4                     num_oid_estimation;
  uint4                     num_HA_estimation;  /**< 0 if not HA mode */
  uint2                     n_desc_indexes;     /**< numbered starting from 0 */
  uint2                     n_desc_events;

  uint2                     exact_OID_sizeof;
  uint2                     layout_OID_size;

  mco_dict_class_info_t   * v_class_info;   
  mco_dict_index_t        * v_desc_indexes;     /**< index descriptors */  
  mco_dict_event_t        * v_desc_events;
  mco_dict_struct_t       * v_all_struct;    

}
  mco_dictionary_t,
* mco_dict_h;


#ifdef MCO_NO_FORWARDS

typedef void * mco_objhandle_h;

#else

struct mco_objhandle_t_;
typedef struct mco_objhandle_t_ * mco_objhandle_h;

#endif



typedef struct mco_external_field_t_ 
{
  uint1          field_type; /**< MCO_DB_FLDTYPE_E */
  union 
  {
    uint1        u1;
    uint2        u2;
    uint4        u4;
    int1         i1;
    int2         i2;
    int4         i4;
    uint2        ptr_size;

#ifdef MCO_TARGET_FLOAT_SUPPORTED
    float        flt;
#endif

#ifdef MCO_TARGET_DOUBLE_SUPPORTED
    double       dbl;
#endif
    int8         i8;
    uint8        u8;
    char         none[8];

  }              v;      
  const char   * ptr;    
}
  mco_external_field_t,
* mco_external_field_h;


/** external key for search, used as mco_abstractkey_external_h */
typedef mco_external_field_t * mco_external_key_h; 

typedef struct mco_pattern_policy_t_ {
  char ignore_other_fields;
  char any_char;
  char one_char;
  nchar_t any_nchar;
  nchar_t one_nchar;
#ifdef MCO_CFG_WCHAR_SUPPORT 
  wchar_t any_wchar;
  wchar_t one_wchar;
#endif

} mco_pattern_policy_t;


MCO_RET   mco_w_new_obj_noid          ( mco_trans_h t, uint4 init_size, uint2 class_code, mco_objhandle_h hret );
MCO_RET   mco_w_new_obj_noid_ev       ( mco_trans_h t, uint4 init_size, uint2 class_code, mco_objhandle_h hret, uint2 ev_id );
MCO_RET   mco_w_new_obj_oid           ( mco_trans_h t, uint4 init_size, uint2 class_code, const void * oid, uint2 oid_sizeof, mco_objhandle_h ret );
MCO_RET   mco_w_new_obj_oid_ev        ( mco_trans_h t, uint4 init_size, uint2 class_code, const void * oid, uint2 oid_sizeof, mco_objhandle_h ret, uint2 ev_id );
MCO_RET   mco_w_obj_delete_all        ( mco_trans_h t, uint2 class_code); 
MCO_RET   mco_w_obj_delete_all_ev     ( mco_trans_h t, uint2 class_code, uint2 ev_id ); 
MCO_RET   mco_w_obj_delete            ( mco_objhandle_h obj ); 
MCO_RET   mco_w_obj_delete_ev         ( mco_objhandle_h obj, uint2 ev_id ); 
MCO_RET   mco_w_obj_checkpoint        ( mco_objhandle_h obj ); 
MCO_RET   mco_w_oid_get               ( mco_objhandle_h obj, void *oid, uint2 oid_sizeof );
MCO_RET   mco_w_find_byoid            ( mco_trans_h t, const void *oid, mco_objhandle_h hret, uint2 class_code ); /**< class_code ignored if 0 */
MCO_RET   mco_w_obj_del_byoid         ( mco_trans_h t, const void *oid );
MCO_RET   mco_w_classcode_byoid       ( mco_trans_h t, const void *oid, uint2 *ret );

MCO_RET   mco_w_cursor_get_index      ( mco_cursor_h c, uint2 * index);
MCO_RET   mco_w_cursor_locate         ( mco_trans_h t, uint2 index_code, mco_objhandle_h obj, mco_cursor_h c );
MCO_RET   mco_w_cursor_compare        ( mco_trans_h t, mco_cursor_h c, mco_external_key_h ek, int *result ); 

MCO_RET   mco_w_hash_find_scalar      ( mco_trans_h t, uint2 index_code, mco_external_key_h ek, mco_objhandle_h  ret);
MCO_RET   mco_w_hash_find_vect        ( mco_trans_h t, uint2 index_code, mco_external_key_h ek, mco_objhandle_h  ret, uint2 *element_index);

MCO_RET   mco_w_tree_find_scalar      ( mco_trans_h t, uint2 index_code, mco_external_key_h ek, mco_objhandle_h  ret);
MCO_RET   mco_w_tree_find_vect        ( mco_trans_h t, uint2 index_code, mco_external_key_h ek, mco_objhandle_h  ret, uint2 *element_index);

MCO_RET   mco_w_obj_from_cursor       ( mco_trans_h t, mco_cursor_h c, uint2 class_code, mco_objhandle_h obj );
MCO_RET   mco_w_list_cursor           ( mco_trans_h t, uint2 class_code, mco_cursor_h c );
MCO_RET   mco_w_index_cursor          ( mco_trans_h t, uint2 index_code, mco_cursor_h c );

MCO_RET   mco_w_version_next          ( mco_objhandle_h h, mco_objhandle_h res, uint2 index_code);
MCO_RET   mco_w_version_prev          ( mco_objhandle_h h, mco_objhandle_h res, uint2 index_code);

MCO_RET   mco_w_vector_size_get2      ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 * result );

MCO_RET   mco_w_v_struct_size_put2    ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 length );
MCO_RET   mco_w_v_struct_e_erase2     ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, int2 indexaware);
MCO_RET   mco_w_v_struct_e_put2       ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, 
                                        mco_objhandle_h ret, uint2 index, uint2 s_u_sz, uint2 s_c_sz,
                                        uint2 u_align, uint2 c_align, int2 indexaware);
MCO_RET   mco_w_v_struct_e_get2       ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, 
                                        mco_objhandle_h ret, uint2 index);

MCO_RET   mco_w_v_chars_size_put2     ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 length, uint2 elsize);
MCO_RET   mco_w_v_chars_e_get2        ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, uint2 el_size, char *dest, uint2 destsz);
MCO_RET   mco_w_v_chars_e_put2        ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, uint2 el_size, const char * src, uint2 srcsz, int2 indexaware);

MCO_RET   mco_w_v_simple_size_put2    ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 length, uint2 elsize);
MCO_RET   mco_w_v_simple_e_get2       ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, uint2 elsize, void * dest );
MCO_RET   mco_w_v_simple_e_getrange2  ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 startindex, uint2 elsize, uint2 numof_els, void * dest, short is_enum );
MCO_RET   mco_w_v_simple_e_put2       ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, uint2 elsize, int2 indexaware, const void * from);
MCO_RET   mco_w_v_simple_e_putrange2  ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 startindex, uint2 elsize, uint2 numof_els, int2 indexaware, const void * pfrom, short is_enum);

MCO_RET   mco_w_v_string_size_put2    ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 length );
MCO_RET   mco_w_v_string_e_get_len2   ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, uint2 * retlen );
MCO_RET   mco_w_v_string_e_get2       ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, char *dest, uint2 destsz, uint2 * retlen);
MCO_RET   mco_w_v_string_e_put2       ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, const char *src, uint2 srcsz, int2 indexaware);

MCO_RET   mco_w_v_nchars_size_put2     ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 length, uint2 elsize);
MCO_RET   mco_w_v_nchars_e_get2        ( mco_objhandle_h obj, mco_obj_offset fld_u_offset, mco_obj_offset fld_c_offset, uint2 index, uint2 el_size, nchar_t *dest, uint2 destsz);