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1 // IStream.h |
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2 |
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3 #ifndef __ISTREAM_H |
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4 #define __ISTREAM_H |
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5 |
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6 #include "../Common/MyUnknown.h" |
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7 #include "../Common/Types.h" |
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8 |
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9 #include "IDecl.h" |
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10 |
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11 #define STREAM_INTERFACE_SUB(i, base, x) DECL_INTERFACE_SUB(i, base, 3, x) |
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12 #define STREAM_INTERFACE(i, x) STREAM_INTERFACE_SUB(i, IUnknown, x) |
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13 |
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14 STREAM_INTERFACE(ISequentialInStream, 0x01) |
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15 { |
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16 STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize) PURE; |
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17 /* |
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18 Out: if size != 0, return_value = S_OK and (*processedSize == 0), |
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19 then there are no more bytes in stream. |
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20 if (size > 0) && there are bytes in stream, |
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21 this function must read at least 1 byte. |
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22 This function is allowed to read less than number of remaining bytes in stream. |
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23 You must call Read function in loop, if you need exact amount of data |
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24 */ |
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25 }; |
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26 |
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27 STREAM_INTERFACE(ISequentialOutStream, 0x02) |
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28 { |
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29 STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize) PURE; |
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30 /* |
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31 if (size > 0) this function must write at least 1 byte. |
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32 This function is allowed to write less than "size". |
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33 You must call Write function in loop, if you need to write exact amount of data |
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34 */ |
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35 }; |
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36 |
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37 STREAM_INTERFACE_SUB(IInStream, ISequentialInStream, 0x03) |
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38 { |
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39 STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE; |
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40 }; |
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41 |
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42 STREAM_INTERFACE_SUB(IOutStream, ISequentialOutStream, 0x04) |
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43 { |
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44 STDMETHOD(Seek)(Int64 offset, UInt32 seekOrigin, UInt64 *newPosition) PURE; |
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45 STDMETHOD(SetSize)(Int64 newSize) PURE; |
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46 }; |
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47 |
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48 STREAM_INTERFACE(IStreamGetSize, 0x06) |
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49 { |
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50 STDMETHOD(GetSize)(UInt64 *size) PURE; |
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51 }; |
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52 |
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53 STREAM_INTERFACE(IOutStreamFlush, 0x07) |
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54 { |
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55 STDMETHOD(Flush)() PURE; |
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56 }; |
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57 |
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58 #endif |