variant8.h

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// variant8.h
 
#ifndef _VARIANT8_H
#define _VARIANT8_H
 
#include <inttypes.h>
 
#define VARIANT8_EMPTY 0x00 // empty - no data
#define VARIANT8_I8 0x01 // signed char - 1byte
#define VARIANT8_UI8 0x02 // unsigned char - 1byte
#define VARIANT8_I16 0x03 // signed short - 2byte
#define VARIANT8_UI16 0x04 // unsigned short - 2byte
#define VARIANT8_I32 0x05 // signed long - 4byte
#define VARIANT8_UI32 0x06 // unsigned long - 4byte
#define VARIANT8_FLT 0x07 // float - 4byte
#define VARIANT8_USER 0x3f // user - up to 7 bytes
#define VARIANT8_PTR 0x40 // pointer - 4 bytes
#define VARIANT8_ARRAY 0x80 // array
#define VARIANT8_ERROR 0xff // error
 
#pragma pack(push)
#pragma pack(1)
 
typedef struct _variant8_t {
    uint8_t type;
    uint8_t usr8;
    uint16_t usr16;
    union {
        char *pc;
        uint32_t usr32;
        float flt;
        uint32_t ui32;
        int32_t i32;
        uint16_t ui16;
        int16_t i16;
        uint8_t ui8;
        int8_t i8;
    };
} variant8_t;
 
#pragma pack(pop)
 
#ifdef __cplusplus
extern "C" {
#endif //__cplusplus
 
extern variant8_t variant8_empty(void); // returns VARIANT8_EMPTY
 
extern variant8_t variant8_i8(int8_t i8); // returns VARIANT8_I8
 
extern variant8_t variant8_ui8(uint8_t ui8); // returns VARIANT8_UI8
 
extern variant8_t variant8_i16(int16_t i16); // returns VARIANT8_I16
 
extern variant8_t variant8_ui16(uint16_t ui16); // returns VARIANT8_UI16
 
extern variant8_t variant8_i32(int32_t i32); // returns VARIANT8_I32
 
extern variant8_t variant8_ui32(uint32_t ui32); // returns VARIANT8_UI32
 
extern variant8_t variant8_flt(float flt); // returns VARIANT8_FLT
 
extern variant8_t variant8_user(uint32_t usr32); // returns VARIANT8_USER
 
#ifdef __cplusplus
}
#endif //__cplusplus
 
#endif //_VARIANT8_H