proto: Added support for marshaling double-precision values.

[sysdb.git] / src / utils / proto.c

diff --git a/src/utils/proto.c b/src/utils/proto.c
index cb88887d1f1313cd0797dcf9a5fbec9c63404277..af4215b8f987a32c5c0c264f9b5f43bbec56ed5f 100644 (file)
--- a/src/utils/proto.c
+++ b/src/utils/proto.c
@@ -25,14 +25,19 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#if HAVE_CONFIG_H
+#      include "config.h"
+#endif
+
 #include "core/data.h"
 #include "core/time.h"
 #include "utils/error.h"
 #include "utils/proto.h"
 
-#include <arpa/inet.h>
+#include <assert.h>
 #include <errno.h>
 
+#include <arpa/inet.h>
 #include <limits.h>
 
 #include <string.h>
@@ -62,13 +67,18 @@ marshal_int(char *buf, size_t buf_len, int64_t v)
 } /* marshal_int */
 
 static ssize_t
-marshal_double(char __attribute__((unused)) *buf,
-               size_t __attribute__((unused)) buf_len,
-               double __attribute__((unused)) v)
+marshal_double(char *buf, size_t buf_len, double v)
 {
-       /* XXX: find a good network representation */
-       errno = ENOTSUP;
-       return -1;
+       uint64_t t = 0;
+       assert(sizeof(v) == sizeof(t));
+       memcpy(&t, &v, sizeof(v));
+#if IEEE754_DOUBLE_BYTE_ORDER != IEEE754_DOUBLE_BIG_ENDIAN
+       t = (((int64_t)ntohl((int32_t)t)) << 32)
+               + ((int64_t)ntohl((int32_t)(t >> 32)));
+#endif
+       if (buf_len >= sizeof(t))
+               memcpy(buf, &t, sizeof(t));
+       return sizeof(t);
 } /* marshal_double */
 
 static ssize_t