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86 lines
1.7 KiB
86 lines
1.7 KiB
#include "pch.h"
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#pragma hdrstop
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#include "dblnul.h"
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//
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// Use of Zero-initialized memory keeps us from having to add nul terminators.
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//
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bool
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DblNulTermList::AddString(
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LPCTSTR psz, // String to copy.
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int cch // Length of psz in chars (excl nul term).
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)
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{
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while((m_cchAlloc - m_cchUsed) < (cch + 2))
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{
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if (!Grow())
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return false;
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}
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DBGASSERT((NULL != m_psz));
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if (NULL != m_psz)
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{
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lstrcpyn(m_psz + m_cchUsed, psz, m_cchAlloc - m_cchUsed);
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m_cchUsed += cch + 1;
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m_cStrings++;
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return true;
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}
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return false;
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}
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bool
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DblNulTermList::Grow(
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void
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)
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{
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DBGASSERT((NULL != m_psz));
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DBGASSERT((m_cchGrow > 0));
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int cb = (m_cchAlloc + m_cchGrow) * sizeof(TCHAR);
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LPTSTR p = new TCHAR[cb];
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if (NULL != p)
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{
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ZeroMemory(p, cb);
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if (NULL != m_psz)
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{
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CopyMemory(p, m_psz, m_cchUsed * sizeof(TCHAR));
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delete[] m_psz;
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}
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m_psz = p;
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m_cchAlloc += m_cchGrow;
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}
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return NULL != m_psz;
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}
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#if DBG
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void
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DblNulTermList::Dump(
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void
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) const
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{
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DBGERROR((TEXT("Dumping nul term list iter -------------")));
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DblNulTermListIter iter = CreateIterator();
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LPCTSTR psz;
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while(iter.Next(&psz))
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DBGERROR((TEXT("%s"), psz ? psz : TEXT("<null>")));
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}
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#endif
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bool
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DblNulTermListIter::Next(
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LPCTSTR *ppszItem
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)
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{
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if (*m_pszCurrent)
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{
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*ppszItem = m_pszCurrent;
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m_pszCurrent += lstrlen(m_pszCurrent) + 1;
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return true;
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}
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return false;
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}
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