Files
rippled/modules/beast_core/files/TemporaryFile.cpp
Vinnie Falco 3fbff6e620 beast cleanup and tidying:
* Replace custom types with C++11 <cstdint> types
* Fix sqlite integer intos and uses
* Fix String implicit integer constructors
* Escape the enclosing namespace in sqdb
* Replace contract checks with assert
* Make many header files compile independently
* Remove the dependence on beast_core.h in many places
* Remove unused or obsolete classes and functions
* Remove unused or obsolete macros
* Remove unused network functions and files
* Remove unused or obsolete classes:
  - ChildProcess
  - HighResolutionTimer
  - InterProcessLock
  - Throw
  - TrackedMutex
  - UntrackedMutex
  - XmlDocument
  - XmlElement
2014-03-23 15:23:55 -07:00

118 lines
4.2 KiB
C++

//------------------------------------------------------------------------------
/*
This file is part of Beast: https://github.com/vinniefalco/Beast
Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
Portions of this file are from JUCE.
Copyright (c) 2013 - Raw Material Software Ltd.
Please visit http://www.juce.com
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
namespace beast
{
static File createTempFile (const File& parentDirectory, String name,
const String& suffix, const int optionFlags)
{
if ((optionFlags & TemporaryFile::useHiddenFile) != 0)
name = "." + name;
return parentDirectory.getNonexistentChildFile (name, suffix, (optionFlags & TemporaryFile::putNumbersInBrackets) != 0);
}
TemporaryFile::TemporaryFile (const String& suffix, const int optionFlags)
: temporaryFile (createTempFile (File::getSpecialLocation (File::tempDirectory),
"temp_" + String::toHexString (Random::getSystemRandom().nextInt()),
suffix, optionFlags))
{
}
TemporaryFile::TemporaryFile (const File& target, const int optionFlags)
: temporaryFile (createTempFile (target.getParentDirectory(),
target.getFileNameWithoutExtension()
+ "_temp" + String::toHexString (Random::getSystemRandom().nextInt()),
target.getFileExtension(), optionFlags)),
targetFile (target)
{
// If you use this constructor, you need to give it a valid target file!
bassert (targetFile != File::nonexistent ());
}
TemporaryFile::TemporaryFile (const File& target, const File& temporary)
: temporaryFile (temporary), targetFile (target)
{
}
TemporaryFile::~TemporaryFile()
{
if (! deleteTemporaryFile())
{
/* Failed to delete our temporary file! The most likely reason for this would be
that you've not closed an output stream that was being used to write to file.
If you find that something beyond your control is changing permissions on
your temporary files and preventing them from being deleted, you may want to
call TemporaryFile::deleteTemporaryFile() to detect those error cases and
handle them appropriately.
*/
bassertfalse;
}
}
//==============================================================================
bool TemporaryFile::overwriteTargetFileWithTemporary() const
{
// This method only works if you created this object with the constructor
// that takes a target file!
bassert (targetFile != File::nonexistent ());
if (temporaryFile.exists())
{
// Have a few attempts at overwriting the file before giving up..
for (int i = 5; --i >= 0;)
{
if (temporaryFile.moveFileTo (targetFile))
return true;
Thread::sleep (100);
}
}
else
{
// There's no temporary file to use. If your write failed, you should
// probably check, and not bother calling this method.
bassertfalse;
}
return false;
}
bool TemporaryFile::deleteTemporaryFile() const
{
// Have a few attempts at deleting the file before giving up..
for (int i = 5; --i >= 0;)
{
if (temporaryFile.deleteFile())
return true;
Thread::sleep (50);
}
return false;
}
} // beast