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+/*
+ * Copyright (c) 2003-2007, John Wiegley.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of New Artisans LLC nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _TIMES_H
+#define _TIMES_H
+
+namespace ledger {
+
+#define SUPPORT_DATE_AND_TIME 1
+#ifdef SUPPORT_DATE_AND_TIME
+
+typedef boost::posix_time::ptime	moment_t;
+typedef moment_t::time_duration_type	duration_t;
+
+inline bool is_valid_moment(const moment_t& moment) {
+  return ! moment.is_not_a_date_time();
+}
+
+#else // SUPPORT_DATE_AND_TIME
+
+typedef boost::gregorian::date          moment_t;
+typedef boost::gregorian::date_duration duration_t;
+
+inline bool is_valid_moment(const moment_t& moment) {
+  return ! moment.is_not_a_date();
+}
+
+#endif // SUPPORT_DATE_AND_TIME
+
+extern const moment_t& now;
+
+DECLARE_EXCEPTION(error, datetime_error);
+
+class interval_t
+{
+public:
+  interval_t() {}
+  interval_t(const string&) {}
+
+  operator bool() const {
+    return false;
+  }
+
+  void start(const moment_t&) {}
+  moment_t next() const { return moment_t(); }
+
+  void parse(std::istream&) {}
+};
+
+#if 0
+inline moment_t ptime_local_to_utc(const moment_t& when) {
+  struct std::tm tm_gmt = to_tm(when);
+  return boost::posix_time::from_time_t(std::mktime(&tm_gmt));
+}
+
+// jww (2007-04-18): I need to make a general parsing function
+// instead, and then make these into private methods.
+inline moment_t ptime_from_local_date_string(const string& date_string) {
+  return ptime_local_to_utc(moment_t(boost::gregorian::from_string(date_string),
+				     time_duration()));
+}
+
+inline moment_t ptime_from_local_time_string(const string& time_string) {
+  return ptime_local_to_utc(boost::posix_time::time_from_string(time_string));
+}
+#endif
+
+moment_t parse_datetime(const char * str);
+
+inline moment_t parse_datetime(const string& str) {
+  return parse_datetime(str.c_str());
+}
+
+extern const ptime time_now;
+extern const date  date_now;
+extern bool        day_before_month;
+
+#if 0
+struct intorchar
+{
+  int	      ival;
+  string sval;
+
+  intorchar() : ival(-1) {}
+  intorchar(int val) : ival(val) {}
+  intorchar(const string& val) : ival(-1), sval(val) {}
+  intorchar(const intorchar& o) : ival(o.ival), sval(o.sval) {}
+};
+
+ledger::moment_t parse_abs_datetime(std::istream& input);
+#endif
+
+} // namespace ledger
+
+#endif // _TIMES_H