// insert a new line after the given one or in the very beginning if !pLine
LineList *wxFileConfig::LineListInsert(const wxString& str,
LineList *pLine)
{
if ( pLine == m_linesTail )
return LineListAppend(str);
LineList *pNewLine = new LineList(str);
if ( pLine == NULL ) {
// prepend to the list
pNewLine->SetNext(m_linesHead);
m_linesHead->SetPrev(pNewLine);
m_linesHead = pNewLine;
}
else {
// insert before pLine
LineList *pNext = pLine->Next();
pNewLine->SetNext(pNext);
pNewLine->SetPrev(pLine);
pNext->SetPrev(pNewLine);
pLine->SetNext(pNewLine);
}
return pNewLine;
}
// append a new line to the end of the list
LineList *wxFileConfig::LineListAppend(const wxString& str)
{
LineList *pLine = new LineList(str);
if ( m_linesTail == NULL ) {
// list is empty
m_linesHead = pLine;
}
else {
// adjust pointers
m_linesTail->SetNext(pLine);
pLine->SetPrev(m_linesTail);
}
m_linesTail = pLine;
return m_linesTail;
}