1 files changed, 120 insertions, 0 deletions
diff --git a/clockB/util.c b/clockB/util.c
new file mode 100644
index 00000000..8a1a6060
--- /dev/null
+++ b/clockB/util.c
@@ -0,0 +1,120 @@
+/**************************************************************************
+
+  This is a component of the hwclock program.
+
+  This file contains the code for various basic utility routines
+  needed by the other modules.
+
+****************************************************************************/
+
+#include <stdio.h>
+#include <string.h>
+
+#include "hwclock.h"
+
+bool
+is_in_cpuinfo(const char * const fmt, const char * const str) {
+/*----------------------------------------------------------------------------
+  Return true iff the /proc/cpuinfo file shows the value 'str' for the
+  keyword 'fmt'.  Both arguments are null-terminated strings.
+
+  If for any reason we can't read /proc/cpuinfo, return false.
+-----------------------------------------------------------------------------*/
+  FILE *cpuinfo;
+  char field[256];
+  char format[256];
+  bool found;
+
+  sprintf(format, "%s : %s", fmt, "%255s");
+
+  found = FALSE;  /* initial value */
+  if ((cpuinfo = fopen ("/proc/cpuinfo", "r")) != NULL) {
+    while (!feof(cpuinfo)) {
+      if (fscanf (cpuinfo, format, field) == 1) {
+        if (strncmp(field, str, strlen(str)) == 0)
+          found = TRUE;
+        break;
+      }
+      fgets (field, 256, cpuinfo);
+    }
+    fclose(cpuinfo);
+  }
+  return found;
+}
+
+
+
+char *
+ctime2(const time_t time) {
+/*----------------------------------------------------------------------------
+  Same as ctime() from the standard C library, except it takes a time_t
+  as an argument instead of a pointer to a time_t, so it is much more
+  useful.
+
+  Also, don't include a newline at the end of the returned string.  If
+  the user wants a newline, he can provide it himself.
+  
+  return value is in static storage within.
+-----------------------------------------------------------------------------*/
+  static char retval[30];
+
+  strncpy(retval, ctime(&time), sizeof(retval));
+  retval[sizeof(retval)-1] = '\0';
+
+  /* Now chop off the last character, which is the newline */
+  if (strlen(retval) >= 1)   /* for robustness */
+    retval[strlen(retval)-1] = '\0';
+  return(retval);
+
+}
+
+
+
+struct timeval
+t2tv(time_t argument) {
+/*----------------------------------------------------------------------------
+   Convert from "time_t" format to "timeval" format.
+-----------------------------------------------------------------------------*/
+  struct timeval retval;
+
+  retval.tv_sec = argument;
+  retval.tv_usec = 0;
+  return(retval);
+}
+
+
+
+float 
+time_diff(struct timeval subtrahend, struct timeval subtractor) {
+/*---------------------------------------------------------------------------
+  The difference in seconds between two times in "timeval" format.
+----------------------------------------------------------------------------*/
+  return( (subtrahend.tv_sec - subtractor.tv_sec)
+           + (subtrahend.tv_usec - subtractor.tv_usec) / 1E6 );
+}
+
+
+struct timeval
+time_inc(struct timeval addend, float increment) {
+/*----------------------------------------------------------------------------
+  The time, in "timeval" format, which is <increment> seconds after
+  the time <addend>.  Of course, <increment> may be negative.
+-----------------------------------------------------------------------------*/
+  struct timeval newtime;
+
+  newtime.tv_sec = addend.tv_sec + (int) increment;
+  newtime.tv_usec = addend.tv_usec + (increment - (int) increment) * 1E6;
+
+  /* Now adjust it so that the microsecond value is between 0 and 1 million */
+  if (newtime.tv_usec < 0) {
+    newtime.tv_usec += 1E6;
+    newtime.tv_sec -= 1;
+  } else if (newtime.tv_usec >= 1E6) {
+    newtime.tv_usec -= 1E6;
+    newtime.tv_sec += 1;
+  }
+  return(newtime);
+}
+
+
+