StreamUtils.cpp (1638B)
1 // StreamUtils.cpp 2 3 #include "StdAfx.h" 4 5 #include "StreamUtils.h" 6 7 static const UInt32 kBlockSize = ((UInt32)1 << 31); 8 9 HRESULT ReadStream(ISequentialInStream *stream, void *data, size_t *processedSize) throw() 10 { 11 size_t size = *processedSize; 12 *processedSize = 0; 13 while (size != 0) 14 { 15 UInt32 curSize = (size < kBlockSize) ? (UInt32)size : kBlockSize; 16 UInt32 processedSizeLoc; 17 HRESULT res = stream->Read(data, curSize, &processedSizeLoc); 18 *processedSize += processedSizeLoc; 19 data = (void *)((Byte *)data + processedSizeLoc); 20 size -= processedSizeLoc; 21 RINOK(res); 22 if (processedSizeLoc == 0) 23 return S_OK; 24 } 25 return S_OK; 26 } 27 28 HRESULT ReadStream_FALSE(ISequentialInStream *stream, void *data, size_t size) throw() 29 { 30 size_t processedSize = size; 31 RINOK(ReadStream(stream, data, &processedSize)); 32 return (size == processedSize) ? S_OK : S_FALSE; 33 } 34 35 HRESULT ReadStream_FAIL(ISequentialInStream *stream, void *data, size_t size) throw() 36 { 37 size_t processedSize = size; 38 RINOK(ReadStream(stream, data, &processedSize)); 39 return (size == processedSize) ? S_OK : E_FAIL; 40 } 41 42 HRESULT WriteStream(ISequentialOutStream *stream, const void *data, size_t size) throw() 43 { 44 while (size != 0) 45 { 46 UInt32 curSize = (size < kBlockSize) ? (UInt32)size : kBlockSize; 47 UInt32 processedSizeLoc; 48 HRESULT res = stream->Write(data, curSize, &processedSizeLoc); 49 data = (const void *)((const Byte *)data + processedSizeLoc); 50 size -= processedSizeLoc; 51 RINOK(res); 52 if (processedSizeLoc == 0) 53 return E_FAIL; 54 } 55 return S_OK; 56 }