nanbox.h

/*
 * Copyright (c) 2023 dresden elektronik ingenieurtechnik gmbh.
 * All rights reserved.
 *
 * The software in this package is published under the terms of the BSD
 * style license a copy of which has been included with this distribution in
 * the LICENSE.txt file.
 *
 */
 
#ifndef NANBOX_H
#define NANBOX_H
 
#include "deconz/declspec.h"
 
typedef enum NB_BoxType
{
    NB_TYPE_NAN         = 0, 
    NB_TYPE_NULL        = 1, 
    NB_TYPE_USTRING_PTR = 2, 
    NB_TYPE_ATOM_PTR    = 3, 
    NB_TYPE_TIMESTAMP   = 4, 
    NB_TYPE_BOOL        = 5, 
 
    NB_TYPE_DOUBLE      = 7, 
 
    NB_TYPE_UNKNOWN     = 8  
} NB_BoxType;
 
typedef unsigned long long nb_word;
 
#define NB_SHIFT_TYPE  48LLU
#define NB_SHIFT_Q     51LLU
#define NB_S_TO_Q_MASK 0x1fffLLU
#define NB_TYPE_MASK   7
 
#define NB_ATOM_SHIFT_LENGTH 24ULL
#define NB_ATOM_LENGTH_MASK 0xFFFF
#define NB_ATOM_PTR_MASK 0xFFFFFFUL
 
#define NB_VALUE_NAN   ((NB_S_TO_Q_MASK << NB_SHIFT_Q) | ((nb_word)NB_TYPE_NAN  << NB_SHIFT_TYPE))
#define NB_VALUE_NULL  ((NB_S_TO_Q_MASK << NB_SHIFT_Q) | ((nb_word)NB_TYPE_NULL << NB_SHIFT_TYPE))
#define NB_VALUE_TRUE  ((NB_S_TO_Q_MASK << NB_SHIFT_Q) | ((nb_word)NB_TYPE_BOOL << NB_SHIFT_TYPE) | 3)
#define NB_VALUE_FALSE ((NB_S_TO_Q_MASK << NB_SHIFT_Q) | ((nb_word)NB_TYPE_BOOL << NB_SHIFT_TYPE) | 2)
 
#define NB_VALUE_ATOM_PTR(idx, len)  ((NB_S_TO_Q_MASK << NB_SHIFT_Q) | ((nb_word)NB_TYPE_ATOM_PTR << NB_SHIFT_TYPE) | ((len) << NB_ATOM_SHIFT_LENGTH) | (idx))
 
typedef struct NB_NanBox
{
    union
    {
        nb_word u64; 
        double f64;  
    };
} NB_NanBox;
 
#ifdef __cplusplus
extern "C" {
#endif
 
DECONZ_DLLSPEC int NB_IsBox(struct NB_NanBox);
DECONZ_DLLSPEC NB_BoxType NB_Type(struct NB_NanBox);
 
#ifdef __cplusplus
}
#endif
 
#endif /* NANBOX_H */