1. wxCopyFile() uses buffer (huge copy speed up)

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

diff --git a/src/common/string.cpp b/src/common/string.cpp
index f37934d939c1aa8b65c26ca4fe76a14df9c4b4a2..f8d1fc4594783063940b13e1783b094399702e83 100644 (file)
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -85,6 +85,12 @@ static const struct
   wxChar dummy;
 } g_strEmpty = { {-1, 0, 0}, wxT('\0') };
 
+#if defined(__VISAGECPP__) && __IBMCPP__ >= 400
+// must define this static for VA or else you get multiply defined symbols everywhere
+const unsigned int wxSTRING_MAXLEN = UINT_MAX - 100;
+
+#endif
+
 // empty C style string: points to 'string data' byte of g_strEmpty
 extern const wxChar WXDLLEXPORT *wxEmptyString = &g_strEmpty.dummy;
 
@@ -107,7 +113,7 @@ extern const wxChar WXDLLEXPORT *wxEmptyString = &g_strEmpty.dummy;
 //       function wxVsnprintfA (A for ANSI), should also find one for Unicode
 //       strings in Unicode build
 #ifdef __WXMSW__
-    #if (defined(__VISUALC__) || defined(wxUSE_NORLANDER_HEADERS)) && !defined(__MINGW32__)
+    #if defined(__VISUALC__) || (defined(__MINGW32__) && wxUSE_NORLANDER_HEADERS)
         #define wxVsnprintfA     _vsnprintf
     #endif
 #else   // !Windows
@@ -284,10 +290,12 @@ void wxString::InitWith(const wxChar *psz, size_t nPos, size_t nLength)
 {
   Init();
 
-  wxASSERT( nPos <= wxStrlen(psz) );
+  // if the length is not given, assume the string to be NUL terminated
+  if ( nLength == wxSTRING_MAXLEN ) {
+    wxASSERT_MSG( nPos <= wxStrlen(psz), _T("index out of bounds") );
 
-  if ( nLength == wxSTRING_MAXLEN )
     nLength = wxStrlen(psz + nPos);
+  }
 
   STATISTICS_ADD(InitialLength, nLength);
 
@@ -335,15 +343,15 @@ wxString::wxString(const char *psz, wxMBConv& conv, size_t nLength)
 
 #if wxUSE_WCHAR_T
 // from wide string
-wxString::wxString(const wchar_t *pwz)
+wxString::wxString(const wchar_t *pwz, wxMBConv& conv)
 {
   // first get necessary size
-  size_t nLen = pwz ? wxWC2MB((char *) NULL, pwz, 0) : 0;
+  size_t nLen = pwz ? conv.WC2MB((char *) NULL, pwz, 0) : 0;
 
   // empty?
   if ( (nLen != 0) && (nLen != (size_t)-1) ) {
     AllocBuffer(nLen);
-    wxWC2MB(m_pchData, pwz, nLen);
+    conv.WC2MB(m_pchData, pwz, nLen);
   }
   else {
     Init();
@@ -522,6 +530,12 @@ void wxString::UngetWriteBuf()
   GetStringData()->Validate(TRUE);
 }
 
+void wxString::UngetWriteBuf(size_t nLen)
+{
+  GetStringData()->nDataLength = nLen;
+  GetStringData()->Validate(TRUE);
+}
+
 // ---------------------------------------------------------------------------
 // data access
 // ---------------------------------------------------------------------------
@@ -762,6 +776,35 @@ wxString wxString::Mid(size_t nFirst, size_t nCount) const
   return dest;
 }
 
+// check that the tring starts with prefix and return the rest of the string
+// in the provided pointer if it is not NULL, otherwise return FALSE
+bool wxString::StartsWith(const wxChar *prefix, wxString *rest) const
+{
+    wxASSERT_MSG( prefix, _T("invalid parameter in wxString::StartsWith") );
+
+    // first check if the beginning of the string matches the prefix: note
+    // that we don't have to check that we don't run out of this string as
+    // when we reach the terminating NUL, either prefix string ends too (and
+    // then it's ok) or we break out of the loop because there is no match
+    const wxChar *p = c_str();
+    while ( *prefix )
+    {
+        if ( *prefix++ != *p++ )
+        {
+            // no match
+            return FALSE;
+        }
+    }
+
+    if ( rest )
+    {
+        // put the rest of the string into provided pointer
+        *rest = p;
+    }
+
+    return TRUE;
+}
+
 // extract nCount last (rightmost) characters
 wxString wxString::Right(size_t nCount) const
 {
@@ -898,6 +941,8 @@ bool wxString::IsWord() const
 bool wxString::IsNumber() const
 {
   const wxChar *s = (const wxChar*) *this;
+  if (wxStrlen(s))
+     if ((s[0] == '-') || (s[0] == '+')) s++;
   while(*s){
     if(!wxIsdigit(*s)) return(FALSE);
     s++;
@@ -1491,8 +1536,34 @@ int wxString::sprintf(const wxChar *pszFormat, ...)
 // ---------------------------------------------------------------------------
 // standard C++ library string functions
 // ---------------------------------------------------------------------------
+
 #ifdef  wxSTD_STRING_COMPATIBILITY
 
+void wxString::resize(size_t nSize, wxChar ch)
+{
+    size_t len = length();
+
+    if ( nSize < len )
+    {
+        Truncate(nSize);
+    }
+    else if ( nSize > len )
+    {
+        *this += wxString(ch, len - nSize);
+    }
+    //else: we have exactly the specified length, nothing to do
+}
+
+void wxString::swap(wxString& str)
+{
+    // this is slightly less efficient than fiddling with m_pchData directly,
+    // but it is still quite efficient as we don't copy the string here because
+    // ref count always stays positive
+    wxString tmp = str;
+    str = *this;
+    *this = str;
+}
+
 wxString& wxString::insert(size_t nPos, const wxString& str)
 {
   wxASSERT( str.GetStringData()->IsValid() );
@@ -1525,7 +1596,7 @@ size_t wxString::find(const wxString& str, size_t nStart) const
 #if !defined(__VISUALC__) || defined(__WIN32__)
 size_t wxString::find(const wxChar* sz, size_t nStart, size_t n) const
 {
-  return find(wxString(sz, n == npos ? 0 : n), nStart);
+  return find(wxString(sz, n), nStart);
 }
 #endif // VC++ 1.5
 
@@ -1590,7 +1661,7 @@ size_t wxString::find_first_of(const wxChar* sz, size_t nStart) const
     const wxChar *start = c_str() + nStart;
     const wxChar *firstOf = wxStrpbrk(start, sz);
     if ( firstOf )
-        return firstOf - start;
+        return firstOf - c_str();
     else
         return npos;
 }
@@ -1701,13 +1772,15 @@ wxString& wxString::erase(size_t nStart, size_t nLen)
 
 wxString& wxString::replace(size_t nStart, size_t nLen, const wxChar *sz)
 {
-  wxASSERT( nStart + nLen <= wxStrlen(sz) );
+  wxASSERT_MSG( nStart + nLen <= Len(),
+                _T("index out of bounds in wxString::replace") );
 
   wxString strTmp;
+  strTmp.Alloc(Len());      // micro optimisation to avoid multiple mem allocs
+
   if ( nStart != 0 )
     strTmp.append(c_str(), nStart);
-  strTmp += sz;
-  strTmp.append(c_str() + nStart + nLen);
+  strTmp << sz << c_str() + nStart + nLen;
 
   *this = strTmp;
   return *this;
@@ -2081,6 +2154,9 @@ void wxArrayString::Sort(CompareFunction compareFunction)
 
   DoSort();
 
+  // reset it to NULL so that Sort(bool) will work the next time
+  gs_compareFunction = NULL;
+
   END_SORT();
 }
 
@@ -2105,3 +2181,17 @@ void wxArrayString::DoSort()
   qsort(m_pItems, m_nCount, sizeof(wxChar *), wxStringCompareFunction);
 }
 
+bool wxArrayString::operator==(const wxArrayString& a) const
+{
+    if ( m_nCount != a.m_nCount )
+        return FALSE;
+
+    for ( size_t n = 0; n < m_nCount; n++ )
+    {
+        if ( Item(n) != a[n] )
+            return FALSE;
+    }
+
+    return TRUE;
+}
+