implemented fallback for AlphaBlend() for the systems not supporting it

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

diff --git a/src/common/string.cpp b/src/common/string.cpp
index e2563e5c824bc1bfc8e07aafc5443a0fbb827964..791c5ce049d2f4836b45afc46b3e628eb810b2fc 100644 (file)
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -6,7 +6,7 @@
 // Created:     29/01/98
 // RCS-ID:      $Id$
 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence:     wxWindows license
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 #ifdef __GNUG__
@@ -229,24 +229,38 @@ wxString::wxString(const void *pStart, const void *pEnd)
 // from multibyte string
 wxString::wxString(const char *psz, wxMBConv& conv, size_t nLength)
 {
-  // first get necessary size
-  size_t nLen = psz ? conv.MB2WC((wchar_t *) NULL, psz, 0) : 0;
+    // first get the size of the buffer we need
+    size_t nLen;
+    if ( psz )
+    {
+        // calculate the needed size ourselves or use a provide one
+        nLen = nLength == wxSTRING_MAXLEN ? conv.MB2WC(NULL, psz, 0) : nLength;
+    }
+    else
+    {
+        // nothing to convert
+        nLen = 0;
+    }
 
-  // nLength is number of *Unicode* characters here!
-  if ((nLen != (size_t)-1) && (nLen > nLength))
-    nLen = nLength;
+    // anything to do?
+    if ( (nLen != 0) && (nLen != (size_t)-1) )
+    {
+        if ( !AllocBuffer(nLen) )
+        {
+            wxFAIL_MSG( _T("out of memory in wxString::wxString") );
+            return;
+        }
 
-  // empty?
-  if ( (nLen != 0) && (nLen != (size_t)-1) ) {
-    if ( !AllocBuffer(nLen) ) {
-      wxFAIL_MSG( _T("out of memory in wxString::wxString") );
-      return;
+        // MB2WC wants the buffer size, not the string length
+        if ( conv.MB2WC(m_pchData, psz, nLen + 1) != (size_t)-1 )
+        {
+            // initialized ok
+            return;
+        }
+        //else: the conversion failed -- leave the string empty (what else?)
     }
-    conv.MB2WC(m_pchData, psz, nLen);
-  }
-  else {
+
     Init();
-  }
 }
 
 #else // ANSI
@@ -255,27 +269,38 @@ wxString::wxString(const char *psz, wxMBConv& conv, size_t nLength)
 // from wide string
 wxString::wxString(const wchar_t *pwz, wxMBConv& conv, size_t nLength)
 {
-  // first get necessary size
-  size_t nLen = 0;
-  if (pwz)
-  {
-    if (nLength == wxSTRING_MAXLEN)
-      nLen = conv.WC2MB((char *) NULL, pwz, 0);
+    // first get the size of the buffer we need
+    size_t nLen;
+    if ( pwz )
+    {
+        // calculate the needed size ourselves or use a provide one
+        nLen = nLength == wxSTRING_MAXLEN ? conv.WC2MB(NULL, pwz, 0) : nLength;
+    }
     else
-      nLen = nLength;
-  }
+    {
+        // nothing to convert
+        nLen = 0;
+    }
 
-  // empty?
-  if ( (nLen != 0) && (nLen != (size_t)-1) ) {
-    if ( !AllocBuffer(nLen) ) {
-      wxFAIL_MSG( _T("out of memory in wxString::wxString") );
-      return;
+    // anything to do?
+    if ( (nLen != 0) && (nLen != (size_t)-1) )
+    {
+        if ( !AllocBuffer(nLen) )
+        {
+            wxFAIL_MSG( _T("out of memory in wxString::wxString") );
+            return;
+        }
+
+        // WC2MB wants the buffer size, not the string length
+        if ( conv.WC2MB(m_pchData, pwz, nLen + 1) != (size_t)-1 )
+        {
+            // initialized ok
+            return;
+        }
+        //else: the conversion failed -- leave the string empty (what else?)
     }
-    conv.WC2MB(m_pchData, pwz, nLen);
-  }
-  else {
+
     Init();
-  }
 }
 #endif // wxUSE_WCHAR_T
 
@@ -583,7 +608,7 @@ wxString& wxString::operator=(const wchar_t *pwz)
 // ---------------------------------------------------------------------------
 
 // add something to this string
-bool wxString::ConcatSelf(int nSrcLen, const wxChar *pszSrcData)
+bool wxString::ConcatSelf(size_t nSrcLen, const wxChar *pszSrcData)
 {
   STATISTICS_ADD(SummandLength, nSrcLen);
 
@@ -730,6 +755,16 @@ wxString wxString::FromAscii(const char *ascii)
     return res;
 }
 
+wxString wxString::FromAscii(const char ascii)
+{
+    // What do we do with '\0' ?
+
+    wxString res;
+    res += (wchar_t)(unsigned char) ascii;
+    
+    return res;
+}
+
 const wxCharBuffer wxString::ToAscii() const
 {
     // this will allocate enough space for the terminating NUL too
@@ -1752,7 +1787,7 @@ void wxArrayString::Copy(const wxArrayString& src)
 void wxArrayString::Grow(size_t nIncrement)
 {
   // only do it if no more place
-  if ( m_nCount == m_nSize ) {
+  if ( (m_nSize - m_nCount) < nIncrement ) {
     // if ARRAY_DEFAULT_INITIAL_SIZE were set to 0, the initially empty would
     // be never resized!
     #if ARRAY_DEFAULT_INITIAL_SIZE == 0
@@ -1762,6 +1797,8 @@ void wxArrayString::Grow(size_t nIncrement)
     if ( m_nSize == 0 ) {
       // was empty, alloc some memory
       m_nSize = ARRAY_DEFAULT_INITIAL_SIZE;
+      if (m_nSize < nIncrement)
+          m_nSize = nIncrement;
       m_pItems = new wxChar *[m_nSize];
     }
     else {
@@ -2054,7 +2091,7 @@ static wxArrayString::CompareFunction gs_compareFunction = NULL;
 static bool gs_sortAscending = TRUE;
 
 // function which is called by quick sort
-extern "C" int LINKAGEMODE
+extern "C" int wxC_CALLING_CONV     // LINKAGEMODE
 wxStringCompareFunction(const void *first, const void *second)
 {
   wxString *strFirst = (wxString *)first;