Make temporary change of using _strptime for time.strptime permanent.

Flesh out docs to better explain time.strptime (closes bug #697990).

Doc/lib/libtime.tex

@@ -288,14 +288,17 @@ value is a \class{struct_time} as returned by \function{gmtime()} or
 \function{localtime()}.  The \var{format} parameter uses the same
 directives as those used by \function{strftime()}; it defaults to
 \code{"\%a \%b \%d \%H:\%M:\%S \%Y"} which matches the formatting
-returned by \function{ctime()}.  The same platform caveats apply; see
-the local \UNIX{} documentation for restrictions or additional
-supported directives.  If \var{string} cannot be parsed according to
-\var{format}, \exception{ValueError} is raised.  Values which are not
-provided as part of the input string are filled in with default
-values; the specific values are platform-dependent as the XPG standard
-does not provide sufficient information to constrain the result.
-\end{funcdesc}
+returned by \function{ctime()}.  If \var{string} cannot be parsed
+according to \var{format}, \exception{ValueError} is raised.  If the
+string to be parsed has excess data after parsing,
+\exception{ValueError} is raised.  The default values used to fill in
+any missing data is \code{(1900, 1, 1, 0, 0, 0, 0, 1, -1)} .
+
+Support for the \code{\%Z} directive is based on the values contained in
+\code{tzname} and whether \code{daylight} is true.  Because of this
+it is platform-specifc sans recognition for UTC and GMT which are
+always known (and are considered to be non-daylight savings
+timezones).
 
 \begin{datadesc}{struct_time}
 The type of the time value sequence returned by \function{gmtime()},

Misc/NEWS

@@ -18,6 +18,9 @@ Extension modules
 
 - SSL no longer crashes the interpreter when the remote side disconnects.
 
+- time.strptime now exclusively uses the Python implementation
+  contained within the _strptime module.
+
 Library
 -------
 

Modules/timemodule.c

@@ -416,44 +416,6 @@ See the library reference manual for formatting codes. When the time tuple\n\
 is not present, current time as returned by localtime() is used.");
 #endif /* HAVE_STRFTIME */
 
-#undef HAVE_STRPTIME
-#ifdef HAVE_STRPTIME
-
-#if 0
-/* Enable this if it's not declared in <time.h> */
-extern char *strptime(const char *, const char *, struct tm *);
-#endif
-
-static PyObject *
-time_strptime(PyObject *self, PyObject *args)
-{
-	struct tm tm;
-	char *fmt = "%a %b %d %H:%M:%S %Y";
-	char *buf;
-	char *s;
-
-	if (!PyArg_ParseTuple(args, "s|s:strptime", &buf, &fmt))
-	        return NULL;
-	memset((void *) &tm, '\0', sizeof(tm));
-	s = strptime(buf, fmt, &tm);
-	if (s == NULL) {
-		PyErr_SetString(PyExc_ValueError, "format mismatch");
-		return NULL;
-	}
-	while (*s && isspace(Py_CHARMASK(*s)))
-		s++;
-	if (*s) {
-		PyErr_Format(PyExc_ValueError,
-			     "unconverted data remains: '%.400s'", s);
-		return NULL;
-	}
-	return tmtotuple(&tm);
-}
-
-#endif /* HAVE_STRPTIME */
-
-#ifndef HAVE_STRPTIME
-
 static PyObject *
 time_strptime(PyObject *self, PyObject *args)
 {
@@ -467,10 +429,8 @@ time_strptime(PyObject *self, PyObject *args)
     return strptime_result;
 }
 
-#endif /* !HAVE_STRPTIME */
-
 PyDoc_STRVAR(strptime_doc,
-"strptime(string, format) -> tuple\n\
+"strptime(string, format) -> struct_time\n\
 \n\
 Parse a string to a time tuple according to a format specification.\n\
 See the library reference manual for formatting codes (same as strftime()).");