#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <mysql.h>

#if defined(_WIN32) || defined(_WIN64) || defined(__WIN32__) || defined(WIN32)
#define DLLEXP __declspec(dllexport) 
#else
#define DLLEXP
#endif

#ifdef  __cplusplus
extern "C" {
#endif

DLLEXP
my_bool udf_const_init(
    UDF_INIT *initid
,   UDF_ARGS *args
,   char *message
);

DLLEXP
void udf_const_deinit(
    UDF_INIT *initid
);

DLLEXP
long long udf_const(
    UDF_INIT *initid
,   UDF_ARGS *args
,   char *is_null
,   char *error
);

#ifdef  __cplusplus
}
#endif

my_bool udf_const_init(
    UDF_INIT *initid
,   UDF_ARGS *args
,   char *message
){
	fprintf(stdout,"enter udf_const_init\n");
	fflush(stdout);
	my_bool status;
    if(args->arg_count==1){
        status = 0;
        args->arg_type[0] = INT_RESULT;
        initid->const_item = 1;	//((long long)*args->args[1]?1:0);
    } else {
        strcpy(
            message
        ,   "Expect exactly one argument."
        );
        status = 1;
    }
    return status;
}

void udf_const_deinit(
    UDF_INIT *initid
){
	fprintf(stdout,"enter udf_const_deinit\n");
	fflush(stdout);
}

long long udf_const(
    UDF_INIT *initid
,   UDF_ARGS *args
,   char *is_null
,   char *error
){
	fprintf(stdout,"udf_const row level function\n");
	fflush(stdout);
	//return *((long long *)args->args[0]);	
	return initid->const_item;
}