--- a
+++ b/HRV.src/seconds.c
@@ -0,0 +1,58 @@
+/* seconds.c		Joe Mietus		Oct 7 2008 */
+
+/*
+seconds :
+Usage: seconds [[hh]:mm]:ss | -
+  Convert string in [[hh:]mm:]ss to seconds
+  `-' to read stdin
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+
+main(argc, argv)
+int argc;
+char *argv[];
+{
+    char *time[12];
+    long strtim();
+
+    if (argc < 2) {
+        usage(argv[0]);
+	exit(1);
+    }
+
+    if (*argv[1] == '-')
+        switch (argv[1][1]) {
+	    case '\0' : while (scanf("%s", time) == 1)
+	                    printf("%ld\n", strtim(time));
+		        exit(0);
+	    default : usage(argv[0]);
+		      exit(1);
+	}
+    else
+        printf("%ld\n", strtim(argv[1]));
+}
+
+
+long strtim(buf)	/* convert string in [[hh:]mm:]ss to seconds */
+char *buf;
+{
+	long x, y, z;
+
+	switch (sscanf(buf, "%ld:%ld:%ld", &x, &y, &z)) {
+		case 1: return (x);
+		case 2: return (60*x + y);
+		case 3: return (3600*x + 60*y + z);
+		default: return (-1L);
+	}
+}
+
+
+usage(prog)
+char *prog;
+{
+    fprintf(stderr, "Usage: %s [[hh]:mm]:ss | -\n", prog);
+    fprintf(stderr, " Convert string in [[hh:]mm:]ss to seconds\n");
+    fprintf(stderr, " `-' to read stdin\n");
+}