Mercurial > vba-linux

     1 // OutByte.cpp

     2 

     3 #include "StdAfx.h"

     4 

     5 #include "OutBuffer.h"

     6 

     7 extern "C"

     8 {

     9   #include "../../../C/Alloc.h"

    10 }

    11 

    12 bool COutBuffer::Create(UInt32 bufferSize)

    13 {

    14   const UInt32 kMinBlockSize = 1;

    15   if (bufferSize < kMinBlockSize)

    16     bufferSize = kMinBlockSize;

    17   if (_buffer != 0 && _bufferSize == bufferSize)

    18     return true;

    19   Free();

    20   _bufferSize = bufferSize;

    21   _buffer = (Byte *)::MidAlloc(bufferSize);

    22   return (_buffer != 0);

    23 }

    24 

    25 void COutBuffer::Free()

    26 {

    27   ::MidFree(_buffer);

    28   _buffer = 0;

    29 }

    30 

    31 void COutBuffer::SetStream(ISequentialOutStream *stream)

    32 {

    33   _stream = stream;

    34 }

    35 

    36 void COutBuffer::Init()

    37 {

    38   _streamPos = 0;

    39   _limitPos = _bufferSize;

    40   _pos = 0;

    41   _processedSize = 0;

    42   _overDict = false;

    43   #ifdef _NO_EXCEPTIONS

    44   ErrorCode = S_OK;

    45   #endif

    46 }

    47 

    48 UInt64 COutBuffer::GetProcessedSize() const

    49 {

    50   UInt64 res = _processedSize + _pos - _streamPos;

    51   if (_streamPos > _pos)

    52     res += _bufferSize;

    53   return res;

    54 }

    55 

    56 

    57 HRESULT COutBuffer::FlushPart()

    58 {

    59   // _streamPos < _bufferSize

    60   UInt32 size = (_streamPos >= _pos) ? (_bufferSize - _streamPos) : (_pos - _streamPos);

    61   HRESULT result = S_OK;

    62   #ifdef _NO_EXCEPTIONS

    63   result = ErrorCode;

    64   #endif

    65   if (_buffer2 != 0)

    66   {

    67     memmove(_buffer2, _buffer + _streamPos, size);

    68     _buffer2 += size;

    69   }

    70 

    71   if (_stream != 0

    72       #ifdef _NO_EXCEPTIONS

    73       && (ErrorCode == S_OK)

    74       #endif

    75      )

    76   {

    77     UInt32 processedSize = 0;

    78     result = _stream->Write(_buffer + _streamPos, size, &processedSize);

    79     size = processedSize;

    80   }

    81   _streamPos += size;

    82   if (_streamPos == _bufferSize)

    83     _streamPos = 0;

    84   if (_pos == _bufferSize)

    85   {

    86     _overDict = true;

    87     _pos = 0;

    88   }

    89   _limitPos = (_streamPos > _pos) ? _streamPos : _bufferSize;

    90   _processedSize += size;

    91   return result;

    92 }

    93 

    94 HRESULT COutBuffer::Flush()

    95 {

    96   #ifdef _NO_EXCEPTIONS

    97   if (ErrorCode != S_OK)

    98     return ErrorCode;

    99   #endif

   100 

   101   while(_streamPos != _pos)

   102   {

   103     HRESULT result = FlushPart();

   104     if (result != S_OK)

   105       return result;

   106   }

   107   return S_OK;

   108 }

   109 

   110 void COutBuffer::FlushWithCheck()

   111 {

   112   HRESULT result = Flush();

   113   #ifdef _NO_EXCEPTIONS

   114   ErrorCode = result;

   115   #else

   116   if (result != S_OK)

   117     throw COutBufferException(result);

   118   #endif

   119 }
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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