1 files changed, 150 insertions, 0 deletions
diff --git a/src/com/android/calendarcommon2/Duration.java b/src/com/android/calendarcommon2/Duration.java
new file mode 100644
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+++ b/src/com/android/calendarcommon2/Duration.java
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+/*
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+package com.android.calendarcommon2;
+
+import java.util.Calendar;
+
+/**
+ * According to RFC2445, durations are like this:
+ *       WEEKS
+ *     | DAYS [ HOURS [ MINUTES [ SECONDS ] ] ]
+ *     | HOURS [ MINUTES [ SECONDS ] ]
+ * it doesn't specifically, say, but this sort of implies that you can't have
+ * 70 seconds.
+ */
+public class Duration
+{
+    public int sign; // 1 or -1
+    public int weeks;
+    public int days;
+    public int hours;
+    public int minutes;
+    public int seconds;
+
+    public Duration()
+    {
+        sign = 1;
+    }
+
+    /**
+     * Parse according to RFC2445 ss4.3.6.  (It's actually a little loose with
+     * its parsing, for better or for worse)
+     */
+    public void parse(String str) throws DateException
+    {
+        sign = 1;
+        weeks = 0;
+        days = 0;
+        hours = 0;
+        minutes = 0;
+        seconds = 0;
+
+        int len = str.length();
+        int index = 0;
+        char c;
+
+        if (len < 1) {
+            return ;
+        }
+
+        c = str.charAt(0);
+        if (c == '-') {
+            sign = -1;
+            index++;
+        }
+        else if (c == '+') {
+            index++;
+        }
+
+        if (len < index) {
+            return ;
+        }
+
+        c = str.charAt(index);
+        if (c != 'P') {
+            throw new DateException (
+                    "Duration.parse(str='" + str + "') expected 'P' at index="
+                    + index);
+        }
+        index++;
+        c = str.charAt(index);
+        if (c == 'T') {
+            index++;
+        }
+
+        int n = 0;
+        for (; index < len; index++) {
+            c = str.charAt(index);
+            if (c >= '0' && c <= '9') {
+                n *= 10;
+                n += ((int)(c-'0'));
+            }
+            else if (c == 'W') {
+                weeks = n;
+                n = 0;
+            }
+            else if (c == 'H') {
+                hours = n;
+                n = 0;
+            }
+            else if (c == 'M') {
+                minutes = n;
+                n = 0;
+            }
+            else if (c == 'S') {
+                seconds = n;
+                n = 0;
+            }
+            else if (c == 'D') {
+                days = n;
+                n = 0;
+            }
+            else if (c == 'T') {
+            }
+            else {
+                throw new DateException (
+                        "Duration.parse(str='" + str + "') unexpected char '"
+                        + c + "' at index=" + index);
+            }
+        }
+    }
+
+    /**
+     * Add this to the calendar provided, in place, in the calendar.
+     */
+    public void addTo(Calendar cal)
+    {
+        cal.add(Calendar.DAY_OF_MONTH, sign*weeks*7);
+        cal.add(Calendar.DAY_OF_MONTH, sign*days);
+        cal.add(Calendar.HOUR, sign*hours);
+        cal.add(Calendar.MINUTE, sign*minutes);
+        cal.add(Calendar.SECOND, sign*seconds);
+    }
+
+    public long addTo(long dt) {
+        return dt + getMillis();
+    }
+
+    public long getMillis() {
+        long factor = 1000 * sign;
+        return factor * ((7*24*60*60*weeks)
+                + (24*60*60*days)
+                + (60*60*hours)
+                + (60*minutes)
+                + seconds);
+    }
+}