1 // Created on: 1992-02-17
2 // Created by: Stephan GARNAUD
3 // Copyright (c) 1992-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _OSD_File_HeaderFile
18 #define _OSD_File_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Boolean.hxx>
25 #include <OSD_LockType.hxx>
26 #include <OSD_OpenMode.hxx>
27 #include <Standard_Integer.hxx>
28 #include <Standard_Address.hxx>
29 #include <OSD_FileNode.hxx>
30 #include <OSD_FromWhere.hxx>
31 #include <OSD_KindFile.hxx>
32 #include <Standard_Size.hxx>
33 class Standard_ProgramError;
36 class TCollection_AsciiString;
39 //! Basic tools to manage files
40 //! Warning: 'ProgramError' is raised when somebody wants to use the methods
41 //! Read, Write, Seek, Close when File is not open.
42 class OSD_File : public OSD_FileNode
49 //! Creates File object.
50 Standard_EXPORT OSD_File();
52 //! Instantiates the object file, storing its name
53 Standard_EXPORT OSD_File(const OSD_Path& Name);
55 //! Unlocks and closes a file, deletes a descriptor and destructs a file object.
56 Standard_EXPORT ~OSD_File();
58 //! CREATES a file if it doesn't already exists or empties
60 //! After 'Build', the file is open.
61 //! If no name was given, ProgramError is raised.
62 Standard_EXPORT void Build (const OSD_OpenMode Mode, const OSD_Protection& Protect);
64 //! Opens a File with specific attributes
65 //! This works only on already existing file.
66 //! If no name was given, ProgramError is raised.
67 Standard_EXPORT void Open (const OSD_OpenMode Mode, const OSD_Protection& Protect);
69 //! Appends data to an existing file.
70 //! If file doesn't exist, creates it first.
71 //! After 'Append', the file is open.
72 //! If no name was given, ProgramError is raised.
73 Standard_EXPORT void Append (const OSD_OpenMode Mode, const OSD_Protection& Protect);
75 //! Attempts to read Nbyte bytes from the file associated with
77 //! Upon successful completion, Read returns the number of
78 //! bytes actually read and placed in the Buffer. This number
79 //! may be less than Nbyte if the number of bytes left in the file
80 //! is less than Nbyte bytes. In this case only number of read
81 //! bytes will be placed in the buffer.
82 Standard_EXPORT void Read (TCollection_AsciiString& Buffer, const Standard_Integer Nbyte);
84 //! Reads bytes from the data pointed to by the object file
85 //! into the buffer <Buffer>.
86 //! Data is read until <NByte-1> bytes have been read,
87 //! until a newline character is read and transferred into
88 //! <Buffer>, or until an EOF (End-of-File) condition is
90 //! Upon successful completion, Read returns the number of
91 //! bytes actually read into <NByteRead> and placed into the
93 Standard_EXPORT void ReadLine (TCollection_AsciiString& Buffer, const Standard_Integer NByte, Standard_Integer& NbyteRead);
95 //! Reads bytes from the data pointed to by the object file
96 //! into the buffer <Buffer>.
97 //! Data is read until <NByte-1> bytes have been read,
98 //! until a newline character is read and transferred into
99 //! <Buffer>, or until an EOF (End-of-File) condition is
101 //! Upon successful completion, Read returns the number of
102 //! bytes actually read and placed into the Buffer <Buffer>.
103 inline Standard_Integer ReadLine (
104 TCollection_AsciiString& Buffer, const Standard_Integer NByte)
106 Standard_Integer NbyteRead;
107 ReadLine(Buffer, NByte, NbyteRead);
112 //! Attempts to read Nbyte bytes from the files associated with
114 //! Upon successful completion, Read returns the number of
115 //! bytes actually read and placed in the Buffer. This number
116 //! may be less than Nbyte if the number of bytes left in the file
117 //! is less than Nbyte bytes. For this reason the output
118 //! parameter Readbyte will contain the number of read bytes.
119 Standard_EXPORT void Read (const Standard_Address Buffer, const Standard_Integer Nbyte, Standard_Integer& Readbyte);
121 //! Attempts to write Nbyte bytes from the AsciiString to the file
122 //! associated to the object File.
123 Standard_EXPORT void Write (const TCollection_AsciiString& Buffer, const Standard_Integer Nbyte);
125 //! Attempts to write Nbyte bytes from the buffer pointed
126 //! to by Buffer to the file associated to the object File.
127 Standard_EXPORT void Write (const Standard_Address Buffer, const Standard_Integer Nbyte);
129 //! Sets the seek pointer associated with the open file
130 Standard_EXPORT void Seek (const Standard_Integer Offset, const OSD_FromWhere Whence);
132 //! Closes the file (and deletes a descriptor)
133 Standard_EXPORT void Close();
135 //! Returns TRUE if the seek pointer is at end of file.
136 Standard_EXPORT Standard_Boolean IsAtEnd();
138 //! Returns the kind of file. A file can be a
139 //! file, a directory or a link.
140 Standard_EXPORT OSD_KindFile KindOfFile() const;
142 //! Makes a temporary File
143 //! This temporary file is already open !
144 Standard_EXPORT void BuildTemporary();
146 //! Locks current file
147 Standard_EXPORT void SetLock (const OSD_LockType Lock);
149 //! Unlocks current file
150 Standard_EXPORT void UnLock();
152 //! Returns the current lock state
153 Standard_EXPORT OSD_LockType GetLock();
155 //! Returns TRUE if this file is locked.
156 Standard_EXPORT Standard_Boolean IsLocked();
158 //! Returns actual number of bytes of <me>.
159 Standard_EXPORT Standard_Size Size();
161 //! Returns TRUE if <me> is open.
162 Standard_EXPORT Standard_Boolean IsOpen() const;
164 //! returns TRUE if the file exists and if the user
165 //! has the autorization to read it.
166 Standard_EXPORT Standard_Boolean IsReadable();
168 //! returns TRUE if the file can be read and overwritten.
169 Standard_EXPORT Standard_Boolean IsWriteable();
171 //! returns TRUE if the file can be executed.
172 Standard_EXPORT Standard_Boolean IsExecutable();
174 //! Enables to emulate unix "tail -f" command.
175 //! If a line is available in the file <me> returns it.
176 //! Otherwise attemps to read again aNbTries times in the file
177 //! waiting aDelay seconds between each read.
178 //! If meanwhile the file increases returns the next line, otherwise
180 Standard_EXPORT Standard_Boolean ReadLastLine (TCollection_AsciiString& aLine, const Standard_Integer aDelay, const Standard_Integer aNbTries);
182 //! find an editor on the system and edit the given file
183 Standard_EXPORT Standard_Boolean Edit();
185 //! Set file pointer position to the beginning of the file
186 Standard_EXPORT void Rewind();
188 //! Redirect a standard handle (fileno(stdout), fileno(stdin) or
189 //! fileno(stderr) to this OSD_File and return the copy of the original
193 //! aTmp.BuildTemporary();
194 //! int stdfd = _fileno(stdout);
196 //! int oldout = aTmp.Capture(stdfd);
197 //! cout << "Some output to the file" << endl;
201 //! _dup2(oldout, stdfd); // Restore standard output
203 Standard_EXPORT int Capture(int theDescr);
210 Standard_Integer myIO;
211 Standard_Address myFILE;
212 Standard_Integer myFileChannel;
213 Standard_Address myFileHandle;
220 Standard_Boolean ImperativeFlag;
233 #endif // _OSD_File_HeaderFile