Use gdk_window_invalidate instead of gtk_widget_queue_draw as the latter doesn't...

[wxWidgets.git] / src / common / string.cpp

diff --git a/src/common/string.cpp b/src/common/string.cpp
index fbfe6cb6b5dfe16e641c434bcf5aa3855cabf9f1..56af51ae22c28dbe3e8306171f575729270236ac 100644 (file)
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -35,10 +35,6 @@
 #include <string.h>
 #include <stdlib.h>
 
 #include <string.h>
 #include <stdlib.h>
 

-#ifdef __SALFORDC__
-    #include <clib.h>
-#endif
-

 #include "wx/hashmap.h"
 
 // string handling functions used by wxString:
 #include "wx/hashmap.h"
 
 // string handling functions used by wxString:


@@ -54,6 +50,18 @@
     #define wxStringStrlen   wxStrlen
 #endif
 
     #define wxStringStrlen   wxStrlen
 #endif
 

+// ----------------------------------------------------------------------------
+// global variables
+// ----------------------------------------------------------------------------
+
+namespace wxPrivate
+{
+
+static UntypedBufferData s_untypedNullData(NULL);
+
+UntypedBufferData * const untypedNullDataPtr = &s_untypedNullData;
+
+} // namespace wxPrivate

 
 // ---------------------------------------------------------------------------
 // static class variables definition
 
 // ---------------------------------------------------------------------------
 // static class variables definition


@@ -62,6 +70,105 @@
 //According to STL _must_ be a -1 size_t
 const size_t wxString::npos = (size_t) -1;
 
 //According to STL _must_ be a -1 size_t
 const size_t wxString::npos = (size_t) -1;
 

+#if wxUSE_STRING_POS_CACHE
+
+#ifdef wxHAS_COMPILER_TLS
+
+wxTLS_TYPE(wxString::Cache) wxString::ms_cache;
+
+#else // !wxHAS_COMPILER_TLS
+
+struct wxStrCacheInitializer
+{
+    wxStrCacheInitializer()
+    {
+        // calling this function triggers s_cache initialization in it, and
+        // from now on it becomes safe to call from multiple threads
+        wxString::GetCache();
+    }
+};
+
+/*
+wxString::Cache& wxString::GetCache()
+{
+    static wxTLS_TYPE(Cache) s_cache;
+
+    return wxTLS_VALUE(s_cache);
+}
+*/
+
+static wxStrCacheInitializer gs_stringCacheInit;
+
+#endif // wxHAS_COMPILER_TLS/!wxHAS_COMPILER_TLS
+
+// gdb seems to be unable to display thread-local variables correctly, at least
+// not my 6.4.98 version under amd64, so provide this debugging helper to do it
+#ifdef __WXDEBUG__
+
+struct wxStrCacheDumper
+{
+    static void ShowAll()
+    {
+        puts("*** wxString cache dump:");
+        for ( unsigned n = 0; n < wxString::Cache::SIZE; n++ )
+        {
+            const wxString::Cache::Element&
+                c = wxString::GetCacheBegin()[n];
+
+            printf("\t%u%s\t%p: pos=(%lu, %lu), len=%ld\n",
+                   n,
+                   n == wxString::LastUsedCacheElement() ? " [*]" : "",
+                   c.str,
+                   (unsigned long)c.pos,
+                   (unsigned long)c.impl,
+                   (long)c.len);
+        }
+    }
+};
+
+void wxDumpStrCache() { wxStrCacheDumper::ShowAll(); }
+
+#endif // __WXDEBUG__
+
+#ifdef wxPROFILE_STRING_CACHE
+
+wxString::CacheStats wxString::ms_cacheStats;
+
+struct wxStrCacheStatsDumper
+{
+    ~wxStrCacheStatsDumper()
+    {
+        const wxString::CacheStats& stats = wxString::ms_cacheStats;
+
+        if ( stats.postot )
+        {
+            puts("*** wxString cache statistics:");
+            printf("\tTotal non-trivial calls to PosToImpl(): %u\n",
+                   stats.postot);
+            printf("\tHits %u (of which %u not used) or %.2f%%\n",
+                   stats.poshits,
+                   stats.mishits,
+                   100.*float(stats.poshits - stats.mishits)/stats.postot);
+            printf("\tAverage position requested: %.2f\n",
+                   float(stats.sumpos) / stats.postot);
+            printf("\tAverage offset after cached hint: %.2f\n",
+                   float(stats.sumofs) / stats.postot);
+        }
+
+        if ( stats.lentot )
+        {
+            printf("\tNumber of calls to length(): %u, hits=%.2f%%\n",
+                   stats.lentot, 100.*float(stats.lenhits)/stats.lentot);
+        }
+    }
+};
+
+static wxStrCacheStatsDumper s_showCacheStats;
+
+#endif // wxPROFILE_STRING_CACHE
+
+#endif // wxUSE_STRING_POS_CACHE
+

 // ----------------------------------------------------------------------------
 // global functions
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // global functions
 // ----------------------------------------------------------------------------


@@ -72,11 +179,16 @@ const size_t wxString::npos = (size_t) -1;
 
 wxSTD ostream& operator<<(wxSTD ostream& os, const wxCStrData& str)
 {
 
 wxSTD ostream& operator<<(wxSTD ostream& os, const wxCStrData& str)
 {

-// FIXME-UTF8: always, not only if wxUSE_UNICODE
-#if wxUSE_UNICODE && !defined(__BORLANDC__)
-    return os << (const wchar_t*)str.AsWCharBuf();
+#if wxUSE_UNICODE && !wxUSE_UNICODE_UTF8
+    const wxCharBuffer buf(str.AsCharBuf());
+    if ( !buf )
+        os.clear(wxSTD ios_base::failbit);
+    else
+        os << buf.data();
+
+    return os;

 #else
 #else

-    return os << (const char*)str.AsCharBuf();
+    return os << str.AsInternal();

 #endif
 }
 
 #endif
 }
 


@@ -97,6 +209,25 @@ wxSTD ostream& operator<<(wxSTD ostream& os, const wxWCharBuffer& str)
 }
 #endif
 
 }
 #endif
 

+#if wxUSE_UNICODE && defined(HAVE_WOSTREAM)
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxString& str)
+{
+    return wos << str.wc_str();
+}
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxCStrData& str)
+{
+    return wos << str.AsWChar();
+}
+
+wxSTD wostream& operator<<(wxSTD wostream& wos, const wxWCharBuffer& str)
+{
+    return wos << str.data();
+}
+
+#endif  // wxUSE_UNICODE && defined(HAVE_WOSTREAM)
+

 #endif // wxUSE_STD_IOSTREAM
 
 // ===========================================================================
 #endif // wxUSE_STD_IOSTREAM
 
 // ===========================================================================


@@ -109,22 +240,30 @@ void wxString::PosLenToImpl(size_t pos, size_t len,
                             size_t *implPos, size_t *implLen) const
 {
     if ( pos == npos )
                             size_t *implPos, size_t *implLen) const
 {
     if ( pos == npos )

+    {

         *implPos = npos;
         *implPos = npos;

-    else
+    }
+    else // have valid start position

     {
     {

-        const_iterator i = begin() + pos;
-        *implPos = wxStringImpl::const_iterator(i.impl()) - m_impl.begin();
+        const const_iterator b = GetIterForNthChar(pos);
+        *implPos = wxStringImpl::const_iterator(b.impl()) - m_impl.begin();

         if ( len == npos )
         if ( len == npos )

+        {

             *implLen = npos;
             *implLen = npos;

-        else
+        }
+        else // have valid length too

         {
         {

-            // too large length is interpreted as "to the end of the string"
-            // FIXME-UTF8: verify this is the case in std::string, assert
-            // otherwise
-            if ( pos + len > length() )
-                len = length() - pos;
-
-            *implLen = (i + len).impl() - i.impl();
+            // we need to handle the case of length specifying a substring
+            // going beyond the end of the string, just as std::string does
+            const const_iterator e(end());
+            const_iterator i(b);
+            while ( len && i <= e )
+            {
+                ++i;
+                --len;
+            }
+
+            *implLen = i.impl() - b.impl();

         }
     }
 }
         }
     }
 }


@@ -355,6 +494,9 @@ wxString::SubstrBufFromMB wxString::ConvertStr(const char *psz, size_t nLength,
         // UTF-8 sequence and psz may be invalid:
         if ( wxStringOperations::IsValidUtf8String(psz, nLength) )
         {
         // UTF-8 sequence and psz may be invalid:
         if ( wxStringOperations::IsValidUtf8String(psz, nLength) )
         {

+            // we must pass the real string length to SubstrBufFromMB ctor
+            if ( nLength == npos )
+                nLength = psz ? strlen(psz) : 0;

             return SubstrBufFromMB(wxCharBuffer::CreateNonOwned(psz), nLength);
         }
         // else: do the roundtrip through wchar_t*
             return SubstrBufFromMB(wxCharBuffer::CreateNonOwned(psz), nLength);
         }
         // else: do the roundtrip through wchar_t*


@@ -973,6 +1115,7 @@ size_t wxString::find_last_not_of(const wxOtherCharType* sz, size_t nStart,
 
 int wxString::CmpNoCase(const wxString& s) const
 {
 
 int wxString::CmpNoCase(const wxString& s) const
 {

+#if wxUSE_UNICODE_UTF8

     // FIXME-UTF8: use wxUniChar::ToLower/ToUpper once added
 
     const_iterator i1 = begin();
     // FIXME-UTF8: use wxUniChar::ToLower/ToUpper once added
 
     const_iterator i1 = begin();


@@ -996,6 +1139,9 @@ int wxString::CmpNoCase(const wxString& s) const
     else if ( len1 > len2 )
         return 1;
     return 0;
     else if ( len1 > len2 )
         return 1;
     return 0;

+#else // wxUSE_UNICODE_WCHAR or ANSI
+    return wxStricmp(m_impl.c_str(), s.m_impl.c_str());
+#endif

 }
 
 
 }
 
 


@@ -1152,7 +1298,7 @@ wxString wxString::Right(size_t nCount) const
   return dest;
 }
 
   return dest;
 }
 

-// get all characters after the last occurence of ch
+// get all characters after the last occurrence of ch

 // (returns the whole string if ch not found)
 wxString wxString::AfterLast(wxUniChar ch) const
 {
 // (returns the whole string if ch not found)
 wxString wxString::AfterLast(wxUniChar ch) const
 {


@@ -1161,7 +1307,7 @@ wxString wxString::AfterLast(wxUniChar ch) const
   if ( iPos == wxNOT_FOUND )
     str = *this;
   else
   if ( iPos == wxNOT_FOUND )
     str = *this;
   else

-    str = wx_str() + iPos + 1;
+    str.assign(*this, iPos + 1, npos);

 
   return str;
 }
 
   return str;
 }


@@ -1179,16 +1325,17 @@ wxString wxString::Left(size_t nCount) const
   return dest;
 }
 
   return dest;
 }
 

-// get all characters before the first occurence of ch
+// get all characters before the first occurrence of ch

 // (returns the whole string if ch not found)
 wxString wxString::BeforeFirst(wxUniChar ch) const
 {
   int iPos = Find(ch);
 // (returns the whole string if ch not found)
 wxString wxString::BeforeFirst(wxUniChar ch) const
 {
   int iPos = Find(ch);

-  if ( iPos == wxNOT_FOUND ) iPos = length();
+  if ( iPos == wxNOT_FOUND )
+      iPos = length();

   return wxString(*this, 0, iPos);
 }
 
   return wxString(*this, 0, iPos);
 }
 

-/// get all characters before the last occurence of ch
+/// get all characters before the last occurrence of ch

 /// (returns empty string if ch not found)
 wxString wxString::BeforeLast(wxUniChar ch) const
 {
 /// (returns empty string if ch not found)
 wxString wxString::BeforeLast(wxUniChar ch) const
 {


@@ -1200,19 +1347,19 @@ wxString wxString::BeforeLast(wxUniChar ch) const
   return str;
 }
 
   return str;
 }
 

-/// get all characters after the first occurence of ch
+/// get all characters after the first occurrence of ch

 /// (returns empty string if ch not found)
 wxString wxString::AfterFirst(wxUniChar ch) const
 {
   wxString str;
   int iPos = Find(ch);
   if ( iPos != wxNOT_FOUND )
 /// (returns empty string if ch not found)
 wxString wxString::AfterFirst(wxUniChar ch) const
 {
   wxString str;
   int iPos = Find(ch);
   if ( iPos != wxNOT_FOUND )

-    str = wx_str() + iPos + 1;
+      str.assign(*this, iPos + 1, npos);

 
   return str;
 }
 
 
   return str;
 }
 

-// replace first (or all) occurences of some substring with another one
+// replace first (or all) occurrences of some substring with another one

 size_t wxString::Replace(const wxString& strOld,
                          const wxString& strNew, bool bReplaceAll)
 {
 size_t wxString::Replace(const wxString& strOld,
                          const wxString& strNew, bool bReplaceAll)
 {


@@ -1220,35 +1367,59 @@ size_t wxString::Replace(const wxString& strOld,
     wxCHECK_MSG( !strOld.empty(), 0,
                  _T("wxString::Replace(): invalid parameter") );
 
     wxCHECK_MSG( !strOld.empty(), 0,
                  _T("wxString::Replace(): invalid parameter") );
 

+    wxSTRING_INVALIDATE_CACHE();
+

     size_t uiCount = 0;   // count of replacements made
 
     size_t uiCount = 0;   // count of replacements made
 

-    size_t uiOldLen = strOld.length();
-    size_t uiNewLen = strNew.length();
+    // optimize the special common case: replacement of one character by
+    // another one (in UTF-8 case we can only do this for ASCII characters)
+    //
+    // benchmarks show that this special version is around 3 times faster
+    // (depending on the proportion of matching characters and UTF-8/wchar_t
+    // build)
+    if ( strOld.m_impl.length() == 1 && strNew.m_impl.length() == 1 )
+    {
+        const wxStringCharType chOld = strOld.m_impl[0],
+                               chNew = strNew.m_impl[0];
+
+        // this loop is the simplified version of the one below
+        for ( size_t pos = 0; ; )
+        {
+            pos = m_impl.find(chOld, pos);
+            if ( pos == npos )
+                break;

 
 

-    size_t dwPos = 0;
+            m_impl[pos++] = chNew;

 
 

-    while ( (*this)[dwPos] != wxT('\0') )
+            uiCount++;
+
+            if ( !bReplaceAll )
+                break;
+        }
+    }
+    else // general case

     {
     {

-        //DO NOT USE STRSTR HERE
-        //this string can contain embedded null characters,
-        //so strstr will function incorrectly
-        dwPos = find(strOld, dwPos);
-        if ( dwPos == npos )
-            break;                  // exit the loop
-        else
+        const size_t uiOldLen = strOld.m_impl.length();
+        const size_t uiNewLen = strNew.m_impl.length();
+
+        for ( size_t pos = 0; ; )

         {
         {

-            //replace this occurance of the old string with the new one
-            replace(dwPos, uiOldLen, strNew, uiNewLen);
+            pos = m_impl.find(strOld.m_impl, pos);
+            if ( pos == npos )
+                break;

 
 

-            //move up pos past the string that was replaced
-            dwPos += uiNewLen;
+            // replace this occurrence of the old string with the new one
+            m_impl.replace(pos, uiOldLen, strNew.m_impl);

 
 

-            //increase replace count
-            ++uiCount;
+            // move up pos past the string that was replaced
+            pos += uiNewLen;

 
 

-            // stop now?
+            // increase replace count
+            uiCount++;
+
+            // stop after the first one?

             if ( !bReplaceAll )
             if ( !bReplaceAll )

-                break;                  // exit the loop
+                break;

         }
     }
 
         }
     }
 


@@ -1324,14 +1495,28 @@ wxString& wxString::MakeLower()
   return *this;
 }
 
   return *this;
 }
 

+wxString& wxString::MakeCapitalized()
+{
+    const iterator en = end();
+    iterator it = begin();
+    if ( it != en )
+    {
+        *it = (wxChar)wxToupper(*it);
+        for ( ++it; it != en; ++it )
+            *it = (wxChar)wxTolower(*it);
+    }
+
+    return *this;
+}
+

 // ---------------------------------------------------------------------------
 // trimming and padding
 // ---------------------------------------------------------------------------
 
 // some compilers (VC++ 6.0 not to name them) return true for a call to
 // ---------------------------------------------------------------------------
 // trimming and padding
 // ---------------------------------------------------------------------------
 
 // some compilers (VC++ 6.0 not to name them) return true for a call to

-// isspace('ê') in the C locale which seems to be broken to me, but we have to
-// live with this by checking that the character is a 7 bit one - even if this
-// may fail to detect some spaces (I don't know if Unicode doesn't have
+// isspace('\xEA') in the C locale which seems to be broken to me, but we have
+// to live with this by checking that the character is a 7 bit one - even if
+// this may fail to detect some spaces (I don't know if Unicode doesn't have

 // space-like symbols somewhere except in the first 128 chars), it is arguably
 // still better than trimming away accented letters
 inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); }
 // space-like symbols somewhere except in the first 128 chars), it is arguably
 // still better than trimming away accented letters
 inline int wxSafeIsspace(wxChar ch) { return (ch < 127) && wxIsspace(ch); }


@@ -1426,61 +1611,62 @@ int wxString::Find(wxUniChar ch, bool bFromEnd) const
     #define DO_IF_NOT_WINCE(x)
 #endif
 
     #define DO_IF_NOT_WINCE(x)
 #endif
 

-#define WX_STRING_TO_INT_TYPE(val, base, func)                              \
-    wxCHECK_MSG( val, false, _T("NULL output pointer") );                   \
+#define WX_STRING_TO_INT_TYPE(out, base, func, T)                           \
+    wxCHECK_MSG( out, false, _T("NULL output pointer") );                   \

     wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );  \
                                                                             \
     DO_IF_NOT_WINCE( errno = 0; )                                           \
                                                                             \
     const wxStringCharType *start = wx_str();                               \
     wxStringCharType *end;                                                  \
     wxASSERT_MSG( !base || (base > 1 && base <= 36), _T("invalid base") );  \
                                                                             \
     DO_IF_NOT_WINCE( errno = 0; )                                           \
                                                                             \
     const wxStringCharType *start = wx_str();                               \
     wxStringCharType *end;                                                  \

-    *val = func(start, &end, base);                                         \
+    T val = func(start, &end, base);                                        \

                                                                             \
     /* return true only if scan was stopped by the terminating NUL and */   \
     /* if the string was not empty to start with and no under/overflow */   \
     /* occurred: */                                                         \
                                                                             \
     /* return true only if scan was stopped by the terminating NUL and */   \
     /* if the string was not empty to start with and no under/overflow */   \
     /* occurred: */                                                         \

-    return !*end && (end != start)                                          \
-        DO_IF_NOT_WINCE( && (errno != ERANGE) )
+    if ( *end || end == start DO_IF_NOT_WINCE(|| errno == ERANGE) )         \
+        return false;                                                       \
+    *out = val;                                                             \
+    return true

 
 

-bool wxString::ToLong(long *val, int base) const
+bool wxString::ToLong(long *pVal, int base) const

 {
 {

-    WX_STRING_TO_INT_TYPE(val, base, wxStrtol);
+    WX_STRING_TO_INT_TYPE(pVal, base, wxStrtol, long);

 }
 
 }
 

-bool wxString::ToULong(unsigned long *val, int base) const
+bool wxString::ToULong(unsigned long *pVal, int base) const

 {
 {

-    WX_STRING_TO_INT_TYPE(val, base, wxStrtoul);
+    WX_STRING_TO_INT_TYPE(pVal, base, wxStrtoul, unsigned long);

 }
 
 }
 

-bool wxString::ToLongLong(wxLongLong_t *val, int base) const
+bool wxString::ToLongLong(wxLongLong_t *pVal, int base) const

 {
 {

-    WX_STRING_TO_INT_TYPE(val, base, wxStrtoll);
+    WX_STRING_TO_INT_TYPE(pVal, base, wxStrtoll, wxLongLong_t);

 }
 
 }
 

-bool wxString::ToULongLong(wxULongLong_t *val, int base) const
+bool wxString::ToULongLong(wxULongLong_t *pVal, int base) const

 {
 {

-    WX_STRING_TO_INT_TYPE(val, base, wxStrtoull);
+    WX_STRING_TO_INT_TYPE(pVal, base, wxStrtoull, wxULongLong_t);

 }
 
 }
 

-bool wxString::ToDouble(double *val) const
+bool wxString::ToDouble(double *pVal) const

 {
 {

-    wxCHECK_MSG( val, false, _T("NULL pointer in wxString::ToDouble") );
+    wxCHECK_MSG( pVal, false, _T("NULL output pointer") );

 
 

-#ifndef __WXWINCE__
-    errno = 0;
-#endif
+    DO_IF_NOT_WINCE( errno = 0; )

 
     const wxChar *start = c_str();
     wxChar *end;
 
     const wxChar *start = c_str();
     wxChar *end;

-    *val = wxStrtod(start, &end);
+    double val = wxStrtod(start, &end);

 
     // return true only if scan was stopped by the terminating NUL and if the
     // string was not empty to start with and no under/overflow occurred
 
     // return true only if scan was stopped by the terminating NUL and if the
     // string was not empty to start with and no under/overflow occurred

-    return !*end && (end != start)
-#ifndef __WXWINCE__
-        && (errno != ERANGE)
-#endif
-    ;
+    if ( *end || end == start DO_IF_NOT_WINCE(|| errno == ERANGE) )
+        return false;
+
+    *pVal = val;
+
+    return true;

 }
 
 // ---------------------------------------------------------------------------
 }
 
 // ---------------------------------------------------------------------------


@@ -1572,6 +1758,60 @@ int wxString::DoPrintfUtf8(const char *format, ...)
 }
 #endif // wxUSE_UNICODE_UTF8
 
 }
 #endif // wxUSE_UNICODE_UTF8
 

+/*
+    Uses wxVsnprintf and places the result into the this string.
+
+    In ANSI build, wxVsnprintf is effectively vsnprintf but in Unicode build
+    it is vswprintf.  Due to a discrepancy between vsnprintf and vswprintf in
+    the ISO C99 (and thus SUSv3) standard the return value for the case of
+    an undersized buffer is inconsistent.  For conforming vsnprintf
+    implementations the function must return the number of characters that
+    would have been printed had the buffer been large enough.  For conforming
+    vswprintf implementations the function must return a negative number
+    and set errno.
+
+    What vswprintf sets errno to is undefined but Darwin seems to set it to
+    EOVERFLOW.  The only expected errno are EILSEQ and EINVAL.  Both of
+    those are defined in the standard and backed up by several conformance
+    statements.  Note that ENOMEM mentioned in the manual page does not
+    apply to swprintf, only wprintf and fwprintf.
+
+    Official manual page:
+    http://www.opengroup.org/onlinepubs/009695399/functions/swprintf.html
+
+    Some conformance statements (AIX, Solaris):
+    http://www.opengroup.org/csq/view.mhtml?RID=ibm%2FSD1%2F3
+    http://www.theopengroup.org/csq/view.mhtml?norationale=1&noreferences=1&RID=Fujitsu%2FSE2%2F10
+
+    Since EILSEQ and EINVAL are rather common but EOVERFLOW is not and since
+    EILSEQ and EINVAL are specifically defined to mean the error is other than
+    an undersized buffer and no other errno are defined we treat those two
+    as meaning hard errors and everything else gets the old behavior which
+    is to keep looping and increasing buffer size until the function succeeds.
+
+    In practice it's impossible to determine before compilation which behavior
+    may be used.  The vswprintf function may have vsnprintf-like behavior or
+    vice-versa.  Behavior detected on one release can theoretically change
+    with an updated release.  Not to mention that configure testing for it
+    would require the test to be run on the host system, not the build system
+    which makes cross compilation difficult. Therefore, we make no assumptions
+    about behavior and try our best to handle every known case, including the
+    case where wxVsnprintf returns a negative number and fails to set errno.
+
+    There is yet one more non-standard implementation and that is our own.
+    Fortunately, that can be detected at compile-time.
+
+    On top of all that, ISO C99 explicitly defines snprintf to write a null
+    character to the last position of the specified buffer.  That would be at
+    at the given buffer size minus 1.  It is supposed to do this even if it
+    turns out that the buffer is sized too small.
+
+    Darwin (tested on 10.5) follows the C99 behavior exactly.
+
+    Glibc 2.6 almost follows the C99 behavior except vswprintf never sets
+    errno even when it fails.  However, it only seems to ever fail due
+    to an undersized buffer.
+*/

 #if wxUSE_UNICODE_UTF8
 template<typename BufferType>
 #else
 #if wxUSE_UNICODE_UTF8
 template<typename BufferType>
 #else


@@ -1609,12 +1849,19 @@ static int DoStringPrintfV(wxString& str,
         // only a copy
         va_list argptrcopy;
         wxVaCopy(argptrcopy, argptr);
         // only a copy
         va_list argptrcopy;
         wxVaCopy(argptrcopy, argptr);

+
+#ifndef __WXWINCE__
+        // Set errno to 0 to make it determinate if wxVsnprintf fails to set it.
+        errno = 0;
+#endif

         int len = wxVsnprintf(buf, size, format, argptrcopy);
         va_end(argptrcopy);
 
         // some implementations of vsnprintf() don't NUL terminate
         // the string if there is not enough space for it so
         // always do it manually
         int len = wxVsnprintf(buf, size, format, argptrcopy);
         va_end(argptrcopy);
 
         // some implementations of vsnprintf() don't NUL terminate
         // the string if there is not enough space for it so
         // always do it manually

+        // FIXME: This really seems to be the wrong and would be an off-by-one
+        // bug except the code above allocates an extra character.

         buf[size] = _T('\0');
 
         // vsnprintf() may return either -1 (traditional Unix behaviour) or the
         buf[size] = _T('\0');
 
         // vsnprintf() may return either -1 (traditional Unix behaviour) or the


@@ -1636,19 +1883,33 @@ static int DoStringPrintfV(wxString& str,
             // assume it only returns error if there is not enough space, but
             // as we don't know how much we need, double the current size of
             // the buffer
             // assume it only returns error if there is not enough space, but
             // as we don't know how much we need, double the current size of
             // the buffer

-            size *= 2;
+#ifndef __WXWINCE__
+            if( (errno == EILSEQ) || (errno == EINVAL) )
+            // If errno was set to one of the two well-known hard errors
+            // then fail immediately to avoid an infinite loop.
+                return -1;
+            else
+#endif // __WXWINCE__
+            // still not enough, as we don't know how much we need, double the
+            // current size of the buffer
+                size *= 2;

 #endif // wxUSE_WXVSNPRINTF/!wxUSE_WXVSNPRINTF
         }
         else if ( len >= size )
         {
 #if wxUSE_WXVSNPRINTF
 #endif // wxUSE_WXVSNPRINTF/!wxUSE_WXVSNPRINTF
         }
         else if ( len >= size )
         {
 #if wxUSE_WXVSNPRINTF

-            // we know that our own implementation of wxVsnprintf() returns 
+            // we know that our own implementation of wxVsnprintf() returns

             // size+1 when there's not enough space but that's not the size
             // of the required buffer!
             size *= 2;      // so we just double the current size of the buffer
 #else
             // some vsnprintf() implementations NUL-terminate the buffer and
             // some don't in len == size case, to be safe always add 1
             // size+1 when there's not enough space but that's not the size
             // of the required buffer!
             size *= 2;      // so we just double the current size of the buffer
 #else
             // some vsnprintf() implementations NUL-terminate the buffer and
             // some don't in len == size case, to be safe always add 1

+            // FIXME: I don't quite understand this comment.  The vsnprintf
+            // function is specifically defined to return the number of
+            // characters printed not including the null terminator.
+            // So OF COURSE you need to add 1 to get the right buffer size.
+            // The following line is definitely correct, no question.

             size = len + 1;
 #endif
         }
             size = len + 1;
 #endif
         }


@@ -1852,38 +2113,3 @@ int wxString::Freq(wxUniChar ch) const
     return count;
 }
 
     return count;
 }
 

-// convert to upper case, return the copy of the string
-wxString wxString::Upper() const
-{ wxString s(*this); return s.MakeUpper(); }
-
-// convert to lower case, return the copy of the string
-wxString wxString::Lower() const { wxString s(*this); return s.MakeLower(); }
-
-// ----------------------------------------------------------------------------
-// wxUTF8StringBuffer
-// ----------------------------------------------------------------------------
-
-#if wxUSE_UNICODE_WCHAR
-wxUTF8StringBuffer::~wxUTF8StringBuffer()
-{
-    wxMBConvStrictUTF8 conv;
-    size_t wlen = conv.ToWChar(NULL, 0, m_buf);
-    wxCHECK_RET( wlen != wxCONV_FAILED, "invalid UTF-8 data in string buffer?" );
-
-    wxStringInternalBuffer wbuf(m_str, wlen);
-    conv.ToWChar(wbuf, wlen, m_buf);
-}
-
-wxUTF8StringBufferLength::~wxUTF8StringBufferLength()
-{
-    wxCHECK_RET(m_lenSet, "length not set");
-
-    wxMBConvStrictUTF8 conv;
-    size_t wlen = conv.ToWChar(NULL, 0, m_buf, m_len);
-    wxCHECK_RET( wlen != wxCONV_FAILED, "invalid UTF-8 data in string buffer?" );
-
-    wxStringInternalBufferLength wbuf(m_str, wlen);
-    conv.ToWChar(wbuf, wlen, m_buf, m_len);
-    wbuf.SetLength(wlen);
-}
-#endif // wxUSE_UNICODE_WCHAR