--- a/mcabber/src/utils.c	Sat Jun 11 19:27:40 2005 +0000
+++ b/mcabber/src/utils.c	Mon Jun 13 19:29:09 2005 +0000
@@ -1,9 +1,34 @@
+/*
+ * utils.c      -- Various utility functions
+ * 
+ * Copyright (C) 2005 Mikael Berthe <bmikael@lists.lilotux.net>
+ * ut_* functions are derived from Cabber debug/log code.
+ * from_iso8601() comes from the Gaim project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include <time.h>
 
+#include <config.h>
+
 static int DebugEnabled;
 static char *FName;
 
@@ -65,3 +90,99 @@
   }
 }
 
+//  to_iso8601(dststr, timestamp)
+// Convert timestamp to iso8601 format, and store it in dststr.
+// NOTE: dststr should be at last 19 chars long.
+// Return should be 0
+int to_iso8601(char *dststr, time_t timestamp)
+{
+  struct tm *tm_time;
+  int ret;
+
+  tm_time = gmtime(&timestamp);
+
+  ret = snprintf(dststr, 19, "%.4d%02d%02dT%02d:%02d:%02dZ",
+        1900+tm_time->tm_year, tm_time->tm_mon+1, tm_time->tm_mday,
+        tm_time->tm_hour, tm_time->tm_min, tm_time->tm_sec);
+
+  return ((ret == -1) ? -1 : 0);
+}
+
+//  from_iso8601(timestamp, utc)
+// This function comes from the Gaim project, gaim_str_to_time().
+// (Actually date may not be pure iso-8601)
+// Thanks, guys!
+time_t from_iso8601(const char *timestamp, int utc)
+{
+  struct tm t;
+  time_t retval = 0;
+  char buf[32];
+  char *c;
+  int tzoff = 0;
+
+  time(&retval);
+  localtime_r(&retval, &t);
+
+  snprintf(buf, sizeof(buf), "%s", timestamp);
+  c = buf;
+
+  /* 4 digit year */
+  if (!sscanf(c, "%04d", &t.tm_year)) return 0;
+  c+=4;
+  if (*c == '-')
+    c++;
+
+  t.tm_year -= 1900;
+
+  /* 2 digit month */
+  if (!sscanf(c, "%02d", &t.tm_mon)) return 0;
+  c+=2;
+  if (*c == '-')
+    c++;
+
+  t.tm_mon -= 1;
+
+  /* 2 digit day */
+  if (!sscanf(c, "%02d", &t.tm_mday)) return 0;
+  c+=2;
+  if (*c == 'T' || *c == '.') { /* we have more than a date, keep going */
+    c++; /* skip the "T" */
+
+    /* 2 digit hour */
+    if (sscanf(c, "%02d:%02d:%02d", &t.tm_hour, &t.tm_min, &t.tm_sec) == 3 ||
+        sscanf(c, "%02d%02d%02d", &t.tm_hour, &t.tm_min, &t.tm_sec) == 3) {
+      int tzhrs, tzmins;
+      c+=8;
+      if (*c == '.') /* dealing with precision we don't care about */
+        c += 4;
+
+      if ((*c == '+' || *c == '-') &&
+          sscanf(c+1, "%02d:%02d", &tzhrs, &tzmins)) {
+        tzoff = tzhrs*60*60 + tzmins*60;
+        if (*c == '+')
+          tzoff *= -1;
+      }
+
+      if (tzoff || utc) {
+
+//#ifdef HAVE_TM_GMTOFF
+        tzoff += t.tm_gmtoff;
+//#else
+//#   ifdef HAVE_TIMEZONE
+//        tzset();    /* making sure */
+//        tzoff -= timezone;
+//#   endif
+//#endif
+      }
+    }
+  }
+
+  t.tm_isdst = -1;
+
+  retval = mktime(&t);
+
+  retval += tzoff;
+
+  return retval;
+}
+