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#ifndef _COMM_H_
#define _COMM_H_

#ifndef _WIN32
#define __cdecl
#endif

#ifndef _LOBYTE
#if (defined(_SOCK1) || defined(_SOCK11))
#define _LOBYTE 1
#define _HIBYTE 1
#else
#define _LOBYTE 2
#define _HIBYTE 0
#endif
#endif

/*  type */
#define TCPIP                  1
#define SERIAL                 2

/*  flags */
#define COMMNOFLAG            0x00
#define COMMDELAY             0x01
#define COMMNOREPLY           0x10

/*  msgtype */
#define COMMDATA                1
#define COMMACK                 2
#define COMMNAK                 3
#define COMMREGISTER            4
#define COMMUNREGISTER         5

define COMM_MSG_SIZE           1024
#define COMM_DATAP(cp) ((char *)((struct comm_header_t *)cp+1))
#define COMM_HEADER_SIZE       sizeof(struct comm_header_t)
#define COMM_LEN_SIZE           4
#define COMM_UID_SIZE           5
#define COMM_SVC_SIZE           16
#define COMM_ERRCODE_SIZE       4

struct comm_header_t {
    char  len[COMM_LEN_SIZE];  /* data length: 순수 데이터 길이 */
    char  msgtype;               /* Message type                  */
    char  uid[COMM_UID_SIZE];  /* Unique Value: ACK, NAK에서 사용*/
    char  svc[COMM_SVC_SIZE];  /* Destination Id.              */
    char  errcode[COMM_ERRCODE_SIZE]; /* 미사용: 차후 사용할 예정 */
    char  flags;                  /* 위에서 지정한 flag중 하나     */
    unsigned char crc;           /* Check Byte                  */
};
typedef struct comm_header_t    COMM_HEADER;

#if defined(__cplusplus)
extern "C" {
#endif

/* ------------------ function prototypes ------------------- */
int __cdecl ComOpen(int type, char *id, char *port);
int __cdecl ComDetach(void);
int __cdecl ComClose(void);
int __cdecl ComSend(char *svc, int msgtype, char *data, long len, long flags);
int __cdecl ComRecv(char *svc, int *msgtype, char *data, long *len, long flags);

#if defined (__cplusplus)
}
#endif
#endif   /* _COMM_H_ */