Break timespec_str out of gpsutils.c.

It's not used on the client side, and it's needed separately for ntplib.

All regression tesrs pass. PPS is live.

1 files changed, 54 insertions, 0 deletions

diff --git a/timespec_str.c b/timespec_str.c
new file mode 100644
index 00000000..69e045ee
--- /dev/null
+++ b/timespec_str.c
@@ -0,0 +1,54 @@
+/*
+ * This file is Copyright (c) 2010 by the GPSD project
+ * BSD terms apply: see the file COPYING in the distribution root for details.
+ */
+
+/*
+ * We also need to set the value high enough to signal inclusion of
+ * newer features (like clock_gettime).  See the POSIX spec for more info:
+ * http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_02_01_02
+*/
+#define _XOPEN_SOURCE 600
+
+#include <stdio.h>
+#include <time.h>
+#include <sys/time.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "timespec_str.h"
+
+/* Convert a normalized timespec to a nice string 
+ * put in it *buf, buf should be at least 22 bytes
+ *
+ * the returned buffer will look like, shortest case:
+ *    sign character ' ' or '-'
+ *    one digit of seconds
+ *    decmal point '.'
+ *    9 digits of nanoSec
+ *
+ * So 12 chars, like this: "-0.123456789"
+ *
+ * Absolute worst case is 10 digits of seconds.  
+ * So 21 digits like this: "-2147483647.123456789"
+ *
+*/
+void timespec_str(const struct timespec *ts, /*@out@*/char *buf, int buf_size)
+{
+    char sign = ' ';
+
+    /*@-type@*//* splint is confused about timespec*/
+    if ( (0 > ts->tv_nsec ) || ( 0 > ts->tv_sec ) ) {
+	sign = '-';
+    }
+    (void) snprintf( buf, buf_size, "%c%ld.%09ld",
+			  sign,
+			  (long)labs(ts->tv_sec),
+			  (long)labs(ts->tv_nsec));
+    /*@+type@*/
+}
+
+/* end */