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1 | // Copyright (c) 1998-1999 Matra Datavision |
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2 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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3 | // |
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4 | // This file is part of Open CASCADE Technology software library. |
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5 | // |
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6 | // This library is free software; you can redistribute it and/or modify it under |
7 | // the terms of the GNU Lesser General Public License version 2.1 as published |
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8 | // by the Free Software Foundation, with special exception defined in the file |
9 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
10 | // distribution for complete text of the license and disclaimer of any warranty. |
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11 | // |
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12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. |
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14 | |
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15 | |
16 | #include <Storage_BaseDriver.hxx> |
17 | #include <Storage_StreamExtCharParityError.hxx> |
18 | #include <Storage_StreamFormatError.hxx> |
19 | #include <Storage_StreamTypeMismatchError.hxx> |
20 | #include <Storage_StreamWriteError.hxx> |
21 | #include <TCollection_AsciiString.hxx> |
22 | #include <TCollection_ExtendedString.hxx> |
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23 | |
24 | Storage_BaseDriver::Storage_BaseDriver() : myOpenMode(Storage_VSNone) |
25 | { |
26 | } |
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27 | |
28 | Storage_BaseDriver::~Storage_BaseDriver() |
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29 | {} |
30 | |
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31 | TCollection_AsciiString Storage_BaseDriver::ReadMagicNumber (Standard_IStream& theIStream) |
32 | { |
33 | // magic number has the same length which is 7: BINFILE, CMPFILE and FSDFILE |
34 | Standard_Size aMagicNumberLen = 7; |
35 | |
36 | TCollection_AsciiString aReadMagicNumber; |
37 | |
38 | char aChar; |
39 | Standard_Size aReadCharNb = 0; |
40 | |
41 | while (theIStream.good() && (aReadCharNb < aMagicNumberLen)) |
42 | { |
43 | theIStream.get(aChar); |
44 | aReadCharNb += (Standard_Size)theIStream.gcount(); |
45 | aReadMagicNumber += aChar; |
46 | } |
47 | |
48 | return aReadMagicNumber; |
49 | } |