Add timestamp from_string()

2 files changed, 166 insertions, 0 deletions

diff --git a/tests/timestamp/buildfile b/tests/timestamp/buildfile
new file mode 100644
index 0000000..bb565a2
--- /dev/null
+++ b/tests/timestamp/buildfile
@@ -0,0 +1,7 @@
+# file      : tests/timestamp/buildfile
+# copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
+# license   : MIT; see accompanying LICENSE file
+
+exe{driver}: cxx{driver} ../../butl/lib{butl}
+
+include ../../butl/
diff --git a/tests/timestamp/driver.cxx b/tests/timestamp/driver.cxx
new file mode 100644
index 0000000..2db726d
--- /dev/null
+++ b/tests/timestamp/driver.cxx
@@ -0,0 +1,159 @@
+// file      : tests/timestamp/driver.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2016 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <time.h> // tzset()
+
+#include <locale>
+#include <clocale>
+#include <cassert>
+#include <sstream>
+#include <iostream>
+#include <system_error>
+
+#include <butl/timestamp>
+
+using namespace std;
+using namespace butl;
+
+// Parse the input using the format string. Print the resulted time with the
+// same format string, ensure the output matches the input.
+//
+static bool
+parse (const char* in, const char* fmt, bool local, const char* out)
+{
+  if (out == nullptr)
+    out = in;
+
+  try
+  {
+    const char* e;
+    timestamp t (from_string (in, fmt, local, &e));
+
+    ostringstream o;
+    if (!to_stream (o, t, fmt, false, local))
+      return false;
+
+    return o.str () + e == out;
+  }
+  catch (...)
+  {
+    return false;
+  }
+}
+
+static bool
+parse (const char* in, const char* fmt, const char* out = nullptr)
+{
+  return parse (in, fmt, true, out) && parse (in, fmt, false, out);
+}
+
+static bool
+fail (const char* in, const char* fmt)
+{
+  try
+  {
+    from_string (in, fmt, true);
+    return false;
+  }
+  catch (const system_error&)
+  {
+    return true;
+  }
+}
+
+int
+main ()
+{
+  tzset (); // To use butl::to_stream() later on.
+
+  // Invalid %[].
+  //
+  assert (fail ("Apr 08 19:31:10 2016", "%b %d %H:%M:%S%["));
+  assert (fail ("Apr 08 19:31:10 2016", "%b %d %H:%M:%S%[."));
+  assert (fail ("Apr 08 19:31:10 2016", "%b %d %H:%M:%S%[.U"));
+  assert (fail ("Apr 08 19:31:10 2016", "%b %d %H:%M:%S%[.A]"));
+  assert (fail ("Apr 08 19:31:10 2016", "%d %H:%M:%S%[.U] %Y"));
+  assert (fail ("2016-10-20 11:12:13.123456789", "%Y-%m-%d %H:%M:%S%[N]"));
+
+  // Invalid fraction of a second.
+  //
+  assert (fail ("Apr 08 19:31:10. 2016", "%b %d %H:%M:%S%[.U] %Y"));
+  assert (fail ("Apr 08 19:31:10.1 2016", "%b %d %H:%M:%S%[.M] %Y"));
+  assert (fail ("Apr 08 19:31:10.12 2016", "%b %d %H:%M:%S%[.M] %Y"));
+  assert (fail ("Apr 08 19:31:10.", "%b %d %H:%M:%S%[.U] %Y"));
+  assert (fail ("Apr 08 19:31:10.1", "%b %d %H:%M:%S%[.M] %Y"));
+  assert (fail ("Apr 08 19:31:10.12", "%b %d %H:%M:%S%[.M] %Y"));
+
+  // Input is not fully parsed.
+  //
+  assert (fail (
+    "Feb 21 19:31:10.123456789 2016 GMT", "%b %d %H:%M:%S%[.N] %Y"));
+
+  // Invalid input (%[] unrelated).
+  //
+  assert (fail ("Apr 08 19:31:10.123456789 ABC", "%b %d %H:%M:%S%[.N] %Y"));
+  assert (fail ("Apr 19:31:10 2016", "%b %d %H:%M:%S %Y"));
+  assert (fail ("Opr 08 19:31:10 2016", "%b %d %H:%M:%S %Y"));
+
+  // Parse valid input with a valid format.
+  //
+  assert (parse (
+    "Apr  18 19:31:10 2016", "%b %d %H:%M:%S  %Y", "Apr 18 19:31:10  2016"));
+
+  assert (parse ("Apr 08 19:31:10 2016", "%b %d %H:%M:%S %Y"));
+  assert (parse ("2016-04-08 19:31:10", "%Y-%m-%d %H:%M:%S"));
+
+  assert (parse ("ABC=Apr 18 19:31:10 2016 ABC", "ABC=%b %d %H:%M:%S %Y"));
+  assert (parse ("ABC=2016-04-08 19:31:10 ABC", "ABC=%Y-%m-%d %H:%M:%S"));
+
+  assert (parse ("Feb 11 19:31:10 2016 GMT", "%b %d %H:%M:%S%[.N] %Y"));
+  assert (parse ("2016-02-11 19:31:10 GMT", "%Y-%m-%d %H:%M:%S%[.N]"));
+
+  assert (parse (
+    "Feb 21 19:31:10.384902285 2016 GMT", "%b %d %H:%M:%S%[.N] %Y"));
+  assert (parse (
+    "2016-02-21 19:31:10.384902285 GMT", "%Y-%m-%d %H:%M:%S%[.N]"));
+
+  assert (parse (
+    "Feb 21 19:31:10 .384902285 2016 GMT", "%b %d %H:%M:%S %[.N] %Y"));
+  assert (parse (
+    "2016-02-21 19:31:10 .384902285 GMT", "%Y-%m-%d %H:%M:%S %[.N]"));
+
+  assert (parse (
+    "2016-02-21 19:31:10  .384902285 GMT",
+    "%Y-%m-%d %H:%M:%S %[.N]",
+    "2016-02-21 19:31:10 .384902285 GMT"));
+
+  assert (parse (
+    "2016-02-21 19:31:10 .384902285  GMT",
+    "%Y-%m-%d %H:%M:%S  %[.N]",
+    "2016-02-21 19:31:10  .384902285  GMT"));
+
+  assert (parse (
+    "Feb 21 19:31:10 .384902285NS 2016 GMT", "%b %d %H:%M:%S %[.N]NS %Y"));
+  assert (parse (
+    "2016-02-21 19:31:10 .384902285NS GMT", "%Y-%m-%d %H:%M:%S %[.N]NS"));
+
+  assert (parse (
+    ".384902285 Feb 21 19:31:10 2016", "%[.N] %b %d %H:%M:%S %Y"));
+  assert (parse (
+    ".384902285 2016-02-21 19:31:10", "%[.N] %Y-%m-%d %H:%M:%S"));
+  assert (parse (
+    ".3849022852016-02-21 19:31:10", "%[.N]%Y-%m-%d %H:%M:%S"));
+
+  setlocale (LC_ALL, "de_DE.utf-8");
+  locale::global (locale ("de_DE.utf-8"));
+  assert (parse ("Mai 11 19:31:10 2016 GMT", "%b %d %H:%M:%S%[.N] %Y"));
+  locale::global (locale ("C"));
+
+  // @@ When debuging strptime() fallback implementation compiled with GCC
+  //    5.3.1, the following asserts will fail due to bugs in implementation
+  //    of std::get_time() manipulator. So need to be commented out.
+  //
+  assert (fail ("Apr 08 19:31:10 2016", "%b %d %H:%M:%S %Y %"));
+  assert (fail ("Apr 08 19:31:10", "%b %d %H:%M:%S %Y"));
+
+  assert (parse (
+    "Apr  8 19:31:10 2016", "%b %d %H:%M:%S %Y", "Apr 08 19:31:10 2016"));
+}