compilation fix for Unicode

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20401 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/datetime.cpp

@@ -88,7 +88,8 @@ const long wxDateTime::TIME_T_FACTOR = 1000l;
 // conditional compilation
 // ----------------------------------------------------------------------------
 
-#if defined(HAVE_STRPTIME) && defined(__LINUX__)
+#if defined(HAVE_STRPTIME) && defined(__GLIBC__) && \
+        ((__GLIBC__ == 2) && (__GLIBC_MINOR__ == 0))
     // glibc 2.0.7 strptime() is broken - the following snippet causes it to
     // crash (instead of just failing):
     //
@@ -342,7 +343,7 @@ static long GetTruncatedJDN(wxDateTime::wxDateTime_t day,
             - JDN_OFFSET;
 }
 
-// this function is a wrapper around strftime(3)
+// this function is a wrapper around strftime(3) adding error checking
 static wxString CallStrftime(const wxChar *format, const tm* tm)
 {
     wxChar buf[4096];
@@ -355,6 +356,35 @@ static wxString CallStrftime(const wxChar *format, const tm* tm)
     return wxString(buf);
 }
 
+#ifdef HAVE_STRPTIME
+
+// Unicode-friendly strptime() wrapper
+static const wxChar *
+CallStrptime(const wxChar *input, const char *fmt, tm *tm)
+{
+    // the problem here is that strptime() returns pointer into the string we
+    // passed to it while we're really interested in the pointer into the
+    // original, Unicode, string so we try to transform the pointer back
+#if wxUSE_UNICODE
+    wxCharBuffer inputMB(wxConvertWX2MB(input));
+#else // ASCII
+    const char * const inputMB = input;
+#endif // Unicode/Ascii
+
+    const char *result = strptime(inputMB, fmt, tm);
+    if ( !result )
+        return NULL;
+
+#if wxUSE_UNICODE
+    // FIXME: this is wrong in presence of surrogates &c
+    return input + (result - inputMB.data());
+#else // ASCII
+    return result;
+#endif // Unicode/Ascii
+}
+
+#endif // HAVE_STRPTIME
+
 // if year and/or month have invalid values, replace them with the current ones
 static void ReplaceDefaultYearMonthWithCurrent(int *year,
                                                wxDateTime::Month *month)
@@ -2921,12 +2951,13 @@ const wxChar *wxDateTime::ParseFormat(const wxChar *date,
 
             case _T('x'):       // locale default date representation
 #ifdef HAVE_STRPTIME
-                // try using strptime() - it may fail even if the input is
+                // try using strptime() -- it may fail even if the input is
                 // correct but the date is out of range, so we will fall back
-                // to our generic code anyhow (FIXME !Unicode friendly)
+                // to our generic code anyhow
                 {
                     struct tm tm;
-                    const wxChar *result = strptime(input, "%x", &tm);
+
+                    const wxChar *result = CallStrptime(input, "%x", &tm);
                     if ( result )
                     {
                         input = result;
@@ -2991,7 +3022,7 @@ const wxChar *wxDateTime::ParseFormat(const wxChar *date,
                 {
                     // use strptime() to do it for us (FIXME !Unicode friendly)
                     struct tm tm;
-                    input = strptime(input, "%X", &tm);
+                    input = CallStrptime(input, "%X", &tm);
                     if ( !input )
                     {
                         return (wxChar *)NULL;