Infrastructure: Split the files into subdirectories.

[mLib] / sys / tv.c

diff --git a/sys/tv.c b/sys/tv.c
new file mode 100644 (file)
index 0000000..dca58cc
--- /dev/null
+++ b/sys/tv.c
@@ -0,0 +1,126 @@
+/* -*-c-*-
+ *
+ * Manipulation of timeval structures
+ *
+ * (c) 1998 Straylight/Edgeware
+ */
+
+/*----- Licensing notice --------------------------------------------------*
+ *
+ * This file is part of the mLib utilities library.
+ *
+ * mLib is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * mLib is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with mLib; if not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#include <sys/time.h>
+#include "tv.h"
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @tv_add@ --- *
+ *
+ * Arguments:  @struct timeval *dst@ = destination block
+ *             @const struct timeval *a, *b@ = source blocks
+ *
+ * Returns:    ---
+ *
+ * Use:                Adds two timevals.
+ */
+
+void tv_add(struct timeval *dst,
+           const struct timeval *a, const struct timeval *b)
+{
+  TV_ADD(dst, a, b);
+}
+
+/* --- @tv_addl@ --- *
+ *
+ * Arguments:  @struct timeval *dst@ = destination block
+ *             @const struct timeval *a@ = source blocks
+ *             @time_t sec@, @unsigned long usec@ = time to add
+ *
+ * Returns:    ---
+ *
+ * Use:                Adds a literal time in seconds and microseconds.
+ */
+
+void tv_addl(struct timeval *dst, const struct timeval *a,
+            time_t sec, unsigned long usec)
+{
+  TV_ADDL(dst, a, sec, usec);
+}
+
+/* --- @tv_sub@ --- *
+ *
+ * Arguments:  @struct timeval *dst@ = destination block
+ *             @const struct timeval *a, *b@ = source blocks
+ *
+ * Returns:    ---
+ *
+ * Use:                Subtracts two timevals.
+ */
+
+void tv_sub(struct timeval *dst,
+           const struct timeval *a, const struct timeval *b)
+{
+  TV_SUB(dst, a, b);
+}
+
+/* --- @tv_subl@ --- *
+ *
+ * Arguments:  @struct timeval *dst@ = destination block
+ *             @const struct timeval *a@ = source blocks
+ *             @time_t sec@, @unsigned long usec@ = time to subtract
+ *
+ * Returns:    ---
+ *
+ * Use:                Subtracts a literal time in seconds and microseconds.
+ */
+
+void tv_subl(struct timeval *dst, const struct timeval *a,
+                   time_t sec, unsigned long usec)
+{
+  TV_SUBL(dst, a, sec, usec);
+}
+
+/* --- @tv_cmp@ --- *
+ *
+ * Arguments:  @const struct timeval *a, *b@ = source blocks
+ *
+ * Returns:    Less than, equal to, or greater than zero.
+ *
+ * Use:                Compares two timevals.
+ */
+
+int tv_cmp(const struct timeval *a, const struct timeval *b)
+{
+  /* --- This is more awkward than the case the macro deals with --- */
+
+  if (a->tv_sec > b->tv_sec)
+    return (1);
+  else if (a->tv_sec < b->tv_sec)
+    return (-1);
+  else if (a->tv_usec > b->tv_usec)
+    return (1);
+  else if (a->tv_usec < b->tv_usec)
+    return (-1);
+  else
+    return (0);
+}
+
+/*----- That's all, folks -------------------------------------------------*/