#include </usr/include/mysql/mysql.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <float.h>
#include <assert.h>
#include <string.h>

/* test for little or bigendian */
const int i = 1;
#define is_bigendian() ((*(char*)&i)==0)



my_bool bytes2float_init(UDF_INIT *initid, UDF_ARGS *args, char *message);
float bytes2float(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error);

void ReverseArray( char *arr );

my_bool bytes2float_init(UDF_INIT *initid, UDF_ARGS *args, char *message) {
   /* this is how to fail */
  if (args->arg_count != 1)  {
    strcpy(message, "bytes2float() requires one argument");
    return 1;
  }

  if (args->arg_type[0] != STRING_RESULT) {
    strcpy(message,"bytes2float() requires one string parameter");
    return 1;
  }
  return 0;
}

void ReverseArray( char *arr ) {
	/* reverse a four byte array */
	char temp;
	printf("%s\n","reversing");
	temp = arr[0];
	arr[0]=arr[3];
	arr[3] = temp;
	temp = arr[1];
	arr[1] = arr[2];
	arr[2] = temp;
	}  

float bytes2float(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error) {
    int i;
    char *cbuf = args->args[0]; 
	for ( i=0; i<4; i++){
		fprintf(stderr,"cbuf[%d] = %d\n", i, cbuf[i]);
		} 
    if ( !is_bigendian() ){
	ReverseArray(args->args[0]);
    };
    	for ( i=0; i<4; i++){
		fprintf(stderr,"cbuf[%d] = %d\n", i, cbuf[i]);
		} 
	float *fp = (float *) cbuf;
	fprintf(stderr,"return is %3.5f\n",*fp);

	return *fp;
	//double test = 123.43;
	//fprintf(stderr,"return is %3.5f\n",test);
	//return test;
}