source: NonGTP/OpenEXR/include/IlmImf/ImfStdIO.h @ 855

Revision 855, 4.8 KB checked in by igarcia, 19 years ago (diff)
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[855]1///////////////////////////////////////////////////////////////////////////
2//
3// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
4// Digital Ltd. LLC
5//
6// All rights reserved.
7//
8// Redistribution and use in source and binary forms, with or without
9// modification, are permitted provided that the following conditions are
10// met:
11// *       Redistributions of source code must retain the above copyright
12// notice, this list of conditions and the following disclaimer.
13// *       Redistributions in binary form must reproduce the above
14// copyright notice, this list of conditions and the following disclaimer
15// in the documentation and/or other materials provided with the
16// distribution.
17// *       Neither the name of Industrial Light & Magic nor the names of
18// its contributors may be used to endorse or promote products derived
19// from this software without specific prior written permission.
20//
21// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32//
33///////////////////////////////////////////////////////////////////////////
34
35
36#ifndef INCLUDED_IMF_STD_IO_H
37#define INCLUDED_IMF_STD_IO_H
38
39//-----------------------------------------------------------------------------
40//
41//      Low-level file input and output for OpenEXR
42//      based on C++ standard iostreams.
43//
44//-----------------------------------------------------------------------------
45
46#include <ImfIO.h>
47#include <fstream>
48#include <sstream>
49
50namespace Imf {
51
52//-------------------------------------------
53// class StdIFStream -- an implementation of
54// class IStream based on class std::ifstream
55//-------------------------------------------
56
57class StdIFStream: public IStream
58{
59  public:
60
61    //-------------------------------------------------------
62    // A constructor that opens the file with the given name.
63    // The destructor will close the file.
64    //-------------------------------------------------------
65
66    StdIFStream (const char fileName[]);
67
68   
69    //---------------------------------------------------------
70    // A constructor that uses a std::ifstream that has already
71    // been opened by the caller.  The StdIFStream's destructor
72    // will not close the std::ifstream.
73    //---------------------------------------------------------
74
75    StdIFStream (std::ifstream &is, const char fileName[]);
76
77
78    virtual ~StdIFStream ();
79
80    virtual bool        read (char c[/*n*/], int n);
81    virtual Int64       tellg ();
82    virtual void        seekg (Int64 pos);
83    virtual void        clear ();
84
85  private:
86
87    std::ifstream *     _is;
88    bool                _deleteStream;
89};
90
91
92//-------------------------------------------
93// class StdOFStream -- an implementation of
94// class OStream based on class std::ofstream
95//-------------------------------------------
96
97class StdOFStream: public OStream
98{
99  public:
100
101    //-------------------------------------------------------
102    // A constructor that opens the file with the given name.
103    // The destructor will close the file.
104    //-------------------------------------------------------
105
106    StdOFStream (const char fileName[]);
107   
108
109    //---------------------------------------------------------
110    // A constructor that uses a std::ofstream that has already
111    // been opened by the caller.  The StdOFStream's destructor
112    // will not close the std::ofstream.
113    //---------------------------------------------------------
114
115    StdOFStream (std::ofstream &os, const char fileName[]);
116
117
118    virtual ~StdOFStream ();
119
120    virtual void        write (const char c[/*n*/], int n);
121    virtual Int64       tellp ();
122    virtual void        seekp (Int64 pos);
123
124  private:
125
126    std::ofstream *     _os;
127    bool                _deleteStream;
128};
129
130
131//------------------------------------------------
132// class StdOSStream -- an implementation of class
133// OStream, based on class std::ostringstream
134//------------------------------------------------
135
136class StdOSStream: public OStream
137{
138  public:
139
140    StdOSStream ();
141
142    virtual void        write (const char c[/*n*/], int n);
143    virtual Int64       tellp ();
144    virtual void        seekp (Int64 pos);
145
146    std::string         str () const {return _os.str();}
147
148  private:
149
150    std::ostringstream  _os;
151};
152
153
154} // namespace Imf
155
156#endif
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