91 lines
3.2 KiB
C++
91 lines
3.2 KiB
C++
/*
|
|
==============================================================================
|
|
|
|
This file is part of the JUCE library.
|
|
Copyright (c) 2017 - ROLI Ltd.
|
|
|
|
JUCE is an open source library subject to commercial or open-source
|
|
licensing.
|
|
|
|
The code included in this file is provided under the terms of the ISC license
|
|
http://www.isc.org/downloads/software-support-policy/isc-license. 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.
|
|
|
|
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
|
|
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
|
|
DISCLAIMED.
|
|
|
|
==============================================================================
|
|
*/
|
|
|
|
namespace juce
|
|
{
|
|
|
|
//==============================================================================
|
|
/**
|
|
An input stream that reads from a local file.
|
|
|
|
@see InputStream, FileOutputStream, File::createInputStream
|
|
|
|
@tags{Core}
|
|
*/
|
|
class JUCE_API FileInputStream : public InputStream
|
|
{
|
|
public:
|
|
//==============================================================================
|
|
/** Creates a FileInputStream to read from the given file.
|
|
|
|
After creating a FileInputStream, you should use openedOk() or failedToOpen()
|
|
to make sure that it's OK before trying to read from it! If it failed, you
|
|
can call getStatus() to get more error information.
|
|
*/
|
|
explicit FileInputStream (const File& fileToRead);
|
|
|
|
/** Destructor. */
|
|
~FileInputStream();
|
|
|
|
//==============================================================================
|
|
/** Returns the file that this stream is reading from. */
|
|
const File& getFile() const noexcept { return file; }
|
|
|
|
/** Returns the status of the file stream.
|
|
The result will be ok if the file opened successfully. If an error occurs while
|
|
opening or reading from the file, this will contain an error message.
|
|
*/
|
|
const Result& getStatus() const noexcept { return status; }
|
|
|
|
/** Returns true if the stream couldn't be opened for some reason.
|
|
@see getResult()
|
|
*/
|
|
bool failedToOpen() const noexcept { return status.failed(); }
|
|
|
|
/** Returns true if the stream opened without problems.
|
|
@see getResult()
|
|
*/
|
|
bool openedOk() const noexcept { return status.wasOk(); }
|
|
|
|
|
|
//==============================================================================
|
|
int64 getTotalLength() override;
|
|
int read (void*, int) override;
|
|
bool isExhausted() override;
|
|
int64 getPosition() override;
|
|
bool setPosition (int64) override;
|
|
|
|
private:
|
|
//==============================================================================
|
|
const File file;
|
|
void* fileHandle = nullptr;
|
|
int64 currentPosition = 0;
|
|
Result status { Result::ok() };
|
|
|
|
void openHandle();
|
|
size_t readInternal (void*, size_t);
|
|
|
|
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FileInputStream)
|
|
};
|
|
|
|
} // namespace juce
|