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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: wx/mstream.h | |
3 | // Purpose: Memory stream classes | |
4 | // Author: Guilhem Lavaux | |
5 | // Modified by: | |
6 | // Created: 11/07/98 | |
7 | // RCS-ID: $Id$ | |
8 | // Copyright: (c) Guilhem Lavaux | |
9 | // Licence: wxWindows licence | |
10 | ///////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | #ifndef _WX_WXMMSTREAM_H__ | |
13 | #define _WX_WXMMSTREAM_H__ | |
14 | ||
15 | #include "wx/defs.h" | |
16 | ||
17 | #if wxUSE_STREAMS | |
18 | ||
19 | #include "wx/stream.h" | |
20 | ||
21 | class WXDLLIMPEXP_BASE wxMemoryOutputStream; | |
22 | ||
23 | class WXDLLIMPEXP_BASE wxMemoryInputStream : public wxInputStream | |
24 | { | |
25 | public: | |
26 | wxMemoryInputStream(const void *data, size_t length); | |
27 | wxMemoryInputStream(const wxMemoryOutputStream& stream); | |
28 | wxMemoryInputStream(wxInputStream& stream, | |
29 | wxFileOffset lenFile = wxInvalidOffset) | |
30 | { | |
31 | InitFromStream(stream, lenFile); | |
32 | } | |
33 | wxMemoryInputStream(wxMemoryInputStream& stream) | |
34 | { | |
35 | InitFromStream(stream, wxInvalidOffset); | |
36 | } | |
37 | ||
38 | virtual ~wxMemoryInputStream(); | |
39 | virtual wxFileOffset GetLength() const { return m_length; } | |
40 | virtual bool IsSeekable() const { return true; } | |
41 | ||
42 | virtual char Peek(); | |
43 | virtual bool CanRead() const; | |
44 | ||
45 | wxStreamBuffer *GetInputStreamBuffer() const { return m_i_streambuf; } | |
46 | ||
47 | #if WXWIN_COMPATIBILITY_2_6 | |
48 | // deprecated, compatibility only | |
49 | wxDEPRECATED( wxStreamBuffer *InputStreamBuffer() const ); | |
50 | #endif // WXWIN_COMPATIBILITY_2_6 | |
51 | ||
52 | protected: | |
53 | wxStreamBuffer *m_i_streambuf; | |
54 | ||
55 | size_t OnSysRead(void *buffer, size_t nbytes); | |
56 | wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode); | |
57 | wxFileOffset OnSysTell() const; | |
58 | ||
59 | private: | |
60 | // common part of ctors taking wxInputStream | |
61 | void InitFromStream(wxInputStream& stream, wxFileOffset lenFile); | |
62 | ||
63 | size_t m_length; | |
64 | ||
65 | // copy ctor is implemented above: it copies the other stream in this one | |
66 | DECLARE_ABSTRACT_CLASS(wxMemoryInputStream) | |
67 | DECLARE_NO_ASSIGN_CLASS(wxMemoryInputStream) | |
68 | }; | |
69 | ||
70 | class WXDLLIMPEXP_BASE wxMemoryOutputStream : public wxOutputStream | |
71 | { | |
72 | public: | |
73 | // if data is !NULL it must be allocated with malloc() | |
74 | wxMemoryOutputStream(void *data = NULL, size_t length = 0); | |
75 | virtual ~wxMemoryOutputStream(); | |
76 | virtual wxFileOffset GetLength() const { return m_o_streambuf->GetLastAccess(); } | |
77 | virtual bool IsSeekable() const { return true; } | |
78 | ||
79 | size_t CopyTo(void *buffer, size_t len) const; | |
80 | ||
81 | wxStreamBuffer *GetOutputStreamBuffer() const { return m_o_streambuf; } | |
82 | ||
83 | #if WXWIN_COMPATIBILITY_2_6 | |
84 | // deprecated, compatibility only | |
85 | wxDEPRECATED( wxStreamBuffer *OutputStreamBuffer() const ); | |
86 | #endif // WXWIN_COMPATIBILITY_2_6 | |
87 | ||
88 | protected: | |
89 | wxStreamBuffer *m_o_streambuf; | |
90 | ||
91 | protected: | |
92 | size_t OnSysWrite(const void *buffer, size_t nbytes); | |
93 | wxFileOffset OnSysSeek(wxFileOffset pos, wxSeekMode mode); | |
94 | wxFileOffset OnSysTell() const; | |
95 | ||
96 | DECLARE_DYNAMIC_CLASS(wxMemoryOutputStream) | |
97 | DECLARE_NO_COPY_CLASS(wxMemoryOutputStream) | |
98 | }; | |
99 | ||
100 | #if WXWIN_COMPATIBILITY_2_6 | |
101 | inline wxStreamBuffer *wxMemoryInputStream::InputStreamBuffer() const { return m_i_streambuf; } | |
102 | inline wxStreamBuffer *wxMemoryOutputStream::OutputStreamBuffer() const { return m_o_streambuf; } | |
103 | #endif // WXWIN_COMPATIBILITY_2_6 | |
104 | ||
105 | #endif | |
106 | // wxUSE_STREAMS | |
107 | ||
108 | #endif | |
109 | // _WX_WXMMSTREAM_H__ |