bool CUtlInplaceBuffer::InplaceGetLinePtr( char **ppszInBufferPtr, int *pnLineLength )
{
Assert( IsText() && !ContainsCRLF() );
int nLineLen = PeekLineLength();
if ( nLineLen <= 1 )
{
SeekGet( SEEK_TAIL, 0 );
return false;
}
-- nLineLen; // because it accounts for putting a terminating null-character
char *pszLine = ( char * ) const_cast< void * >( PeekGet() );
SeekGet( SEEK_CURRENT, nLineLen );
// Set the out args
if ( ppszInBufferPtr )
*ppszInBufferPtr = pszLine;
if ( pnLineLength )
*pnLineLength = nLineLen;
return true;
}
//-----------------------------------------------------------------------------
// Modifies the buffer to be binary or text; Blows away the buffer and the CONTAINS_CRLF value.
//-----------------------------------------------------------------------------
void CUtlBufferEditor::SetBufferType( bool bIsText, bool bContainsCRLF )
{
#ifdef _DEBUG
// If the buffer is empty, there is no opportunity for this stuff to fail
if ( TellMaxPut() != 0 )
{
if ( IsText() )
{
if ( bIsText )
{
Assert( ContainsCRLF() == bContainsCRLF );
}
else
{
Assert( ContainsCRLF() );
}
}
else
{
if ( bIsText )
{
Assert( bContainsCRLF );
}
}
}
#endif
if ( bIsText )
{
m_Flags |= TEXT_BUFFER;
}
else
{
m_Flags &= ~TEXT_BUFFER;
}
if ( bContainsCRLF )
{
m_Flags |= CONTAINS_CRLF;
}
else
{
m_Flags &= ~CONTAINS_CRLF;
}
}
//-----------------------------------------------------------------------------
// Reads up to and including the first \n
//-----------------------------------------------------------------------------
void CUtlBufferEditor::GetLine( char* pLine, int nMaxChars )
{
Assert( IsText() && !ContainsCRLF() );
if ( !IsValid() )
{
*pLine = 0;
return;
}
if ( nMaxChars == 0 )
{
nMaxChars = INT_MAX;
}
// Remember, this *includes* the null character
// It will be 0, however, if the buffer is empty.
int nLen = PeekLineLength();
if ( nLen == 0 )
{
*pLine = 0;
m_Error |= GET_OVERFLOW;
return;
}
// Strip off the terminating NULL
if ( nLen <= nMaxChars )
{
Get( pLine, nLen - 1 );
pLine[ nLen - 1 ] = 0;
}
else
{
Get( pLine, nMaxChars - 1 );
pLine[ nMaxChars - 1 ] = 0;
SeekGet( SEEK_CURRENT, nLen - 1 - nMaxChars );
}
}
//-----------------------------------------------------------------------------
// Converts a buffer from a CRLF buffer to a CR buffer (and back)
// Returns false if no conversion was necessary (and outBuf is left untouched)
// If the conversion occurs, outBuf will be cleared.
//-----------------------------------------------------------------------------
bool CUtlBufferEditor::ConvertCRLF( CUtlBufferEditor &outBuf )
{
if ( !IsText() || !outBuf.IsText() )
return false;
if ( ContainsCRLF() == outBuf.ContainsCRLF() )
return false;
int nInCount = TellMaxPut();
outBuf.Purge();
outBuf.EnsureCapacity( nInCount );
bool bFromCRLF = ContainsCRLF();
// Start reading from the beginning
int nGet = TellGet();
int nPut = TellPut();
int nGetDelta = 0;
int nPutDelta = 0;
const char *pBase = (const char*)Base();
int nCurrGet = 0;
while ( nCurrGet < nInCount )
{
const char *pCurr = &pBase[nCurrGet];
if ( bFromCRLF )
{
const char *pNext = Q_strnistr( pCurr, "\r\n", nInCount - nCurrGet );
if ( !pNext )
{
outBuf.Put( pCurr, nInCount - nCurrGet );
break;
}
int nBytes = (size_t)pNext - (size_t)pCurr;
outBuf.Put( pCurr, nBytes );
outBuf.PutChar( '\n' );
nCurrGet += nBytes + 2;
if ( nGet >= nCurrGet - 1 )
{
--nGetDelta;
}
if ( nPut >= nCurrGet - 1 )
{
--nPutDelta;
}
}
else
{
const char *pNext = Q_strnchr( pCurr, '\n', nInCount - nCurrGet );
if ( !pNext )
{
outBuf.Put( pCurr, nInCount - nCurrGet );
break;
}
int nBytes = (size_t)pNext - (size_t)pCurr;
outBuf.Put( pCurr, nBytes );
outBuf.PutChar( '\r' );
outBuf.PutChar( '\n' );
nCurrGet += nBytes + 1;
if ( nGet >= nCurrGet )
{
++nGetDelta;
}
if ( nPut >= nCurrGet )
{
++nPutDelta;
}
}
}
Assert( nPut + nPutDelta <= outBuf.TellMaxPut() );
outBuf.SeekGet( SEEK_HEAD, nGet + nGetDelta );
outBuf.SeekPut( SEEK_HEAD, nPut + nPutDelta );
return true;
}
