windows-nt/Source/XPSP1/NT/shell/applets/cleanup/fldrclnr/dblnul.cpp

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2020-09-26 03:20:57 -05:00
#include "shlobj.h"
#include "debug.h"
#include "dblnul.h"
//
// Brianau's class for dskqouta project (see \shell\osshell\dskoquta\common\)
// only modification is to use the shell debug macros instead of the custom dskqouta ones
//
//
// Use of Zero-initialized memory keeps us from having to add nul terminators.
//
bool
DblNulTermList::AddString(
LPCTSTR psz, // String to copy.
int cch // Length of psz in chars (excl nul term).
)
{
while((m_cchAlloc - m_cchUsed) < (cch + 2))
{
if (!Grow())
return false;
}
ASSERT((NULL != m_psz));
if (NULL != m_psz)
{
lstrcpy(m_psz + m_cchUsed, psz);
m_cchUsed += cch + 1;
m_cStrings++;
return true;
}
return false;
}
bool
DblNulTermList::Grow(
void
)
{
ASSERT((NULL != m_psz));
ASSERT((m_cchGrow > 0));
int cb = (m_cchAlloc + m_cchGrow) * sizeof(TCHAR);
LPTSTR p = new TCHAR[cb];
if (NULL != p)
{
ZeroMemory(p, cb);
if (NULL != m_psz)
{
CopyMemory(p, m_psz, m_cchUsed * sizeof(TCHAR));
delete[] m_psz;
}
m_psz = p;
m_cchAlloc += m_cchGrow;
}
return NULL != m_psz;
}
#if 0
void
DblNulTermList::Dump(
void
) const
{
DBGERROR((TEXT("Dumping nul term list iter -------------")));
DblNulTermListIter iter = CreateIterator();
LPCTSTR psz;
while(iter.Next(&psz))
DBGERROR((TEXT("%s"), psz ? psz : TEXT("<null>")));
}
#endif
bool
DblNulTermListIter::Next(
LPCTSTR *ppszItem
)
{
if (*m_pszCurrent)
{
*ppszItem = m_pszCurrent;
m_pszCurrent += lstrlen(m_pszCurrent) + 1;
return true;
}
return false;
}