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;
40 //! Basic tools to manage files
41 //! Warning: 'ProgramError' is raised when somebody wants to use the methods
42 //! Read, Write, Seek, Close when File is not open.
43 class OSD_File : public OSD_FileNode
50 //! Creates File object.
51 Standard_EXPORT OSD_File();
53 //! Instantiates the object file, storing its name
54 Standard_EXPORT OSD_File(const OSD_Path& Name);
56 //! CREATES a file if it doesn't already exists or empties
58 //! After 'Build', the file is open.
59 //! If no name was given, ProgramError is raised.
60 Standard_EXPORT void Build (const OSD_OpenMode Mode, const OSD_Protection& Protect);
62 //! Opens a File with specific attributes
63 //! This works only on already existing file.
64 //! If no name was given, ProgramError is raised.
65 Standard_EXPORT void Open (const OSD_OpenMode Mode, const OSD_Protection& Protect);
67 //! Appends data to an existing file.
68 //! If file doesn't exist, creates it first.
69 //! After 'Append', the file is open.
70 //! If no name was given, ProgramError is raised.
71 Standard_EXPORT void Append (const OSD_OpenMode Mode, const OSD_Protection& Protect);
73 //! Attempts to read Nbyte bytes from the file associated with
75 //! Upon successful completion, Read returns the number of
76 //! bytes actually read and placed in the Buffer. This number
77 //! may be less than Nbyte if the number of bytes left in the file
78 //! is less than Nbyte bytes. In this case only number of read
79 //! bytes will be placed in the buffer.
80 Standard_EXPORT void Read (TCollection_AsciiString& Buffer, const Standard_Integer Nbyte);
82 //! Reads bytes from the data pointed to by the object file
83 //! into the buffer <Buffer>.
84 //! Data is read until <NByte-1> bytes have been read,
85 //! until a newline character is read and transferred into
86 //! <Buffer>, or until an EOF (End-of-File) condition is
88 //! Upon successful completion, Read returns the number of
89 //! bytes actually read into <NByteRead> and placed into the
91 Standard_EXPORT void ReadLine (TCollection_AsciiString& Buffer, const Standard_Integer NByte, Standard_Integer& NbyteRead);
93 //! Attempts to read Nbyte bytes from the files associated with
95 //! Upon successful completion, Read returns the number of
96 //! bytes actually read and placed in the Buffer. This number
97 //! may be less than Nbyte if the number of bytes left in the file
98 //! is less than Nbyte bytes. For this reason the output
99 //! parameter Readbyte will contain the number of read bytes.
100 Standard_EXPORT void Read (Standard_Address& Buffer, const Standard_Integer Nbyte, Standard_Integer& Readbyte);
102 //! Attempts to write Nbyte bytes from the AsciiString to the file
103 //! associated to the object File.
104 Standard_EXPORT void Write (const TCollection_AsciiString& Buffer, const Standard_Integer Nbyte);
106 //! Attempts to write Nbyte bytes from the buffer pointed
107 //! to by Buffer to the file associated to the object File.
108 Standard_EXPORT void Write (const Standard_Address Buffer, const Standard_Integer Nbyte);
110 //! Sets the seek pointer associated with the open file
111 Standard_EXPORT void Seek (const Standard_Integer Offset, const OSD_FromWhere Whence);
113 //! Closes the file (and deletes a descriptor)
114 Standard_EXPORT void Close();
116 //! Returns TRUE if the seek pointer is at end of file.
117 Standard_EXPORT Standard_Boolean IsAtEnd();
119 //! Returns the kind of file. A file can be a
120 //! file, a directory or a link.
121 Standard_EXPORT OSD_KindFile KindOfFile() const;
123 //! Makes a temporary File
124 //! This returned file is already open !
125 //! This file is non-persistent and will be automatically
126 //! removed when its process finishes.
127 Standard_EXPORT static OSD_File BuildTemporary();
129 //! Locks current file
130 Standard_EXPORT void SetLock (const OSD_LockType Lock);
132 //! Unlocks current file
133 Standard_EXPORT void UnLock();
135 //! Returns the current lock state
136 Standard_EXPORT OSD_LockType GetLock();
138 //! Returns TRUE if this file is locked.
139 Standard_EXPORT Standard_Boolean IsLocked();
141 //! Returns actual number of bytes of <me>.
142 Standard_EXPORT Standard_Size Size();
144 //! Prints a file on selected printer.
145 Standard_EXPORT void Print (const OSD_Printer& WhichPrinter);
147 //! Returns TRUE if <me> is open.
148 Standard_EXPORT Standard_Boolean IsOpen() const;
150 //! returns TRUE if the file exists and if the user
151 //! has the autorization to read it.
152 Standard_EXPORT Standard_Boolean IsReadable();
154 //! returns TRUE if the file can be read and overwritten.
155 Standard_EXPORT Standard_Boolean IsWriteable();
157 //! returns TRUE if the file can be executed.
158 Standard_EXPORT Standard_Boolean IsExecutable();
160 //! Enables to emulate unix "tail -f" command.
161 //! If a line is available in the file <me> returns it.
162 //! Otherwise attemps to read again aNbTries times in the file
163 //! waiting aDelay seconds between each read.
164 //! If meanwhile the file increases returns the next line, otherwise
166 Standard_EXPORT Standard_Boolean ReadLastLine (TCollection_AsciiString& aLine, const Standard_Integer aDelay, const Standard_Integer aNbTries);
168 //! find an editor on the system and edit the given file
169 Standard_EXPORT Standard_Boolean Edit();
178 Standard_Integer myIO;
179 Standard_Address myFILE;
180 Standard_Integer myFileChannel;
181 Standard_Address myFileHandle;
188 Standard_Boolean ImperativeFlag;
201 #endif // _OSD_File_HeaderFile