minor edits for byte swapping

c-code/binary_storage.c

 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
-/* #include <byteswap.h> */
 #include <sys/time.h>
 #include "binary_storage.h"
 
-uint64_t encodeDbl(double a){
-    uint64_t b;
-    unsigned char *src = (unsigned char *)&a,
-                  *dst = (unsigned char *)&b;
-        dst[0] = src[7];
-        dst[1] = src[6];
-        dst[2] = src[5];
-        dst[3] = src[4];
-        dst[4] = src[3];
-        dst[5] = src[2];
-        dst[6] = src[1];
-        dst[7] = src[0];
-    return b;
+uint64_t bswap_d(double a){
+   uint64_t *b = (uint64_t *)&a;
+   return bswap_64(*b);
 }
 
 BinaryStorage bs_open(char* filename){
@@ -61,7 +50,7 @@ int write_record(BinaryStorage *bs, char* name, TSTMP timestamp, double value, T
 
 /* double scalar */
   fputc(17,bs->file);
-  uint64_t rawdata = encodeDbl(value);
+  uint64_t rawdata = bswap_d(value);
   fwrite(&rawdata,8,1,bs->file);
 
 /* tags */