Fix issues with year 2038 (#3052)

* Fix annotations in year 2038

Fixes #3050

* Ensure 32-bit systems work better after 2038

Without this patch, their 32-bit signed long int could overflow.

This patch was done while working on reproducible builds for openSUSE.

src/DOM.cpp

@@ -417,7 +417,7 @@ bool getDOM (const std::string& name, const Task* task, Variant& value)
         {
           // annotation_1234567890
           // 0          ^11
-          value = Variant ((time_t) strtol (i.first.substr (11).c_str (), NULL, 10), Variant::type_date);
+          value = Variant ((time_t) strtoll (i.first.substr (11).c_str (), NULL, 10), Variant::type_date);
           return true;
         }
         else if (elements[2] == "description")

src/TDB2.cpp

@@ -217,7 +217,7 @@ void TDB2::show_diff (
   const std::string& prior,
   const std::string& when)
 {
-  Datetime lastChange (strtol (when.c_str (), nullptr, 10));
+  Datetime lastChange (strtoll (when.c_str (), nullptr, 10));
 
   // Set the colors.
   Color color_red   (Context::getContext ().color () ? Context::getContext ().config.get ("color.undo.before") : "");

src/Task.cpp

@@ -199,8 +199,8 @@ const std::string Task::identifier (bool shortened /* = false */) const
 ////////////////////////////////////////////////////////////////////////////////
 void Task::setAsNow (const std::string& att)
 {
-  char now[16];
-  snprintf (now, 16, "%u", (unsigned int) time (nullptr));
+  char now[22];
+  snprintf (now, 22, "%lli", (long long int) time (nullptr));
   set (att, now);
 
   recalc_urgency = true;
@@ -1189,7 +1189,7 @@ void Task::addAnnotation (const std::string& description)
 
   do
   {
-    key = "annotation_" + format ((int) now);
+    key = "annotation_" + format ((long long int) now);
     ++now;
   }
   while (has (key));

src/columns/ColDescription.cpp

@@ -171,7 +171,7 @@ void ColumnDescription::render (
     {
       for (const auto& i : task.getAnnotations ())
       {
-        Datetime dt (strtol (i.first.substr (11).c_str (), nullptr, 10));
+        Datetime dt (strtoll (i.first.substr (11).c_str (), nullptr, 10));
         description += '\n' + std::string (_indent, ' ') + dt.toString (_dateformat) + ' ' + i.second;
       }
     }
@@ -200,7 +200,7 @@ void ColumnDescription::render (
     {
       for (const auto& i : task.getAnnotations ())
       {
-        Datetime dt (strtol (i.first.substr (11).c_str (), nullptr, 10));
+        Datetime dt (strtoll (i.first.substr (11).c_str (), nullptr, 10));
         description += ' ' + dt.toString (_dateformat) + ' ' + i.second;
       }
     }

src/columns/ColUDA.cpp

@@ -241,7 +241,7 @@ void ColumnUDADate::measure (Task& task, unsigned int& minimum, unsigned int& ma
         //   rc.report.<report>.dateformat
         //   rc.dateformat.report
         //   rc.dateformat
-        Datetime date ((time_t) strtol (value.c_str (), nullptr, 10));
+        Datetime date (strtoll (value.c_str (), nullptr, 10));
         auto format = Context::getContext ().config.get ("report." + _report + ".dateformat");
         if (format == "")
           format = Context::getContext ().config.get ("dateformat.report");
@@ -287,7 +287,7 @@ void ColumnUDADate::render (
           format = Context::getContext ().config.get ("dateformat");
       }
 
-      renderStringLeft (lines, width, color, Datetime ((time_t) strtol (value.c_str (), nullptr, 10)).toString (format));
+      renderStringLeft (lines, width, color, Datetime (strtoll (value.c_str (), nullptr, 10)).toString (format));
     }
     else if (_style == "indicator")
     {

src/commands/CmdCalendar.cpp

@@ -631,7 +631,7 @@ std::string CmdCalendar::renderMonths (
             {
               if(task.has("scheduled") && !coloredWithDue) {
                 std::string scheduled = task.get ("scheduled");
-                Datetime scheduleddmy (strtol (scheduled.c_str(), nullptr, 10));
+                Datetime scheduleddmy (strtoll (scheduled.c_str(), nullptr, 10));
 
                 if (scheduleddmy.sameDay (date))
                 {
@@ -640,7 +640,7 @@ std::string CmdCalendar::renderMonths (
               }
               if(task.has("due")) {
                 std::string due = task.get ("due");
-                Datetime duedmy (strtol (due.c_str(), nullptr, 10));
+                Datetime duedmy (strtoll (due.c_str(), nullptr, 10));
 
                 if (duedmy.sameDay (date))
                 {

src/commands/CmdEdit.cpp

@@ -261,7 +261,7 @@ std::string CmdEdit::formatTask (Task task, const std::string& dateformat)
 
   for (auto& anno : task.getAnnotations ())
   {
-    Datetime dt (strtol (anno.first.substr (11).c_str (), nullptr, 10));
+    Datetime dt (strtoll (anno.first.substr (11).c_str (), nullptr, 10));
     before << "  Annotation:        " << dt.toString (dateformat)
            << " -- "                  << str_replace (anno.second, "\n", ANNOTATION_EDIT_MARKER) << '\n';
   }

src/commands/CmdInfo.cpp

@@ -240,7 +240,7 @@ int CmdInfo::execute (std::string& output)
     auto created = task.get ("entry");
     if (created.length ())
     {
-      Datetime dt (strtol (created.c_str (), nullptr, 10));
+      Datetime dt (strtoll (created.c_str (), nullptr, 10));
       age = Duration (now - dt).formatVague ();
     }
 

src/commands/CmdStats.cpp

@@ -109,13 +109,13 @@ int CmdStats::execute (std::string& output)
     if (task.is_blocked)  ++blockedT;
     if (task.is_blocking) ++blockingT;
 
-    time_t entry = strtol (task.get ("entry").c_str (), nullptr, 10);
+    time_t entry = strtoll (task.get ("entry").c_str (), nullptr, 10);
     if (entry < earliest) earliest = entry;
     if (entry > latest)   latest   = entry;
 
     if (status == Task::completed)
     {
-      time_t end = strtol (task.get ("end").c_str (), nullptr, 10);
+      time_t end = strtoll (task.get ("end").c_str (), nullptr, 10);
       daysPending += (end - entry) / 86400.0;
     }
 

src/commands/CmdSummary.cpp

@@ -109,7 +109,7 @@ int CmdSummary::execute (std::string& output)
       {
         ++countPending[parent];
 
-        time_t entry = strtol (task.get ("entry").c_str (), nullptr, 10);
+        time_t entry = strtoll (task.get ("entry").c_str (), nullptr, 10);
         if (entry)
           sumEntry[parent] = sumEntry[parent] + (double) (now - entry);
       }
@@ -121,8 +121,8 @@ int CmdSummary::execute (std::string& output)
       {
         ++countCompleted[parent];
 
-        time_t entry = strtol (task.get ("entry").c_str (), nullptr, 10);
-        time_t end   = strtol (task.get ("end").c_str (), nullptr, 10);
+        time_t entry = strtoll (task.get ("entry").c_str (), nullptr, 10);
+        time_t end   = strtoll (task.get ("end").c_str (), nullptr, 10);
         if (entry && end)
           sumEntry[parent] = sumEntry[parent] + (double) (end - entry);
       }

src/feedback.cpp

@@ -52,7 +52,7 @@ std::string renderAttribute (const std::string& name, const std::string& value,
         col->type () == "date" &&
         value != "")
     {
-      Datetime d ((time_t)strtol (value.c_str (), nullptr, 10));
+      Datetime d ((time_t)strtoll (value.c_str (), nullptr, 10));
       if (format == "")
         return d.toString (Context::getContext ().config.get ("dateformat"));