hcommand.h

#ifndef __HCOMMAND_H
#define __HCOMMAND_H
 
#include "hexceptions.h"
 
enum H_COMMAND_CLASS
{
    NONE = 0,
 
    ANY = 1,
 
    TUNER = 2,
};
 
enum H_COMMAND_OPCODE
{
    NOP = 0,
 
    SET_FREQUENCY = 1,
 
    SET_GAIN = 2
};
 
union HCommandData {
 
    int32_t Value;
 
    bool State;
 
    void *Content;
};
 
struct HCommand
{
    int16_t Class;
 
    int16_t Opcode;
 
    int16_t Length;
 
     HCommandData Data;
};
 
/* The absolut minimum size of a command, a command that holds either a boolean value or an integer value
 * This is the absolut minimum size of a chunk of data that can be converted to a HCommand struct */
static int HCommandMinimumsSize = sizeof(HCommand);
 
inline size_t HCommandSize(HCommand* command) {
    return HCommandSize(command);
}
 
inline size_t HCommandSize(HCommand& command) {
    switch(command.Opcode) {
        case NOP:
        case SET_FREQUENCY:
        case SET_GAIN:
            return HCommandMinimumsSize + 0;
 
        // Unknownn opcode.
        default: throw new HUnknownCommandOpcodeException("Unknown opcode in call to HCommandSize (or macro HCOMMAND_LENGTH)");
    }
}
 
#endif