mirror of https://github.com/libAthena/athena.git
300 lines
9.7 KiB
C++
300 lines
9.7 KiB
C++
// This file is part of libAthena.
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//
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// libAthena is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// libAthena is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with libAthena. If not, see <http://www.gnu.org/licenses/>
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#ifndef MEMORYWRITER_HPP
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#define MEMORYWRITER_HPP
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#include "Athena/IStreamWriter.hpp"
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#include <string>
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#include <functional>
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namespace Athena
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{
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namespace io
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{
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/*! \class BinaryWriter
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* \brief A Stream class for writing binary data
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*
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* A Class for writing binary data to a file or memory stream,
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* all work is done using a memory buffer, and not written directly to the disk
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* this allows for fast, flexible code as well as the ability to quickly modify data
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* \sa Stream
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*/
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class MemoryWriter : public IStreamWriter
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{
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public:
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/*! \brief This constructor takes an existing buffer to write to.
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*
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* \param data The existing buffer
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* \param length The length of the existing buffer
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*/
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explicit MemoryWriter(atUint8* data = nullptr, atUint64 length=0x10);
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/*! \brief This constructor creates an instance from a file on disk.
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*
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* \param filename The file to create the stream from
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*/
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MemoryWriter(const std::string& filename, std::function<void(int)> progressFun = nullptr);
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virtual ~MemoryWriter();
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/*! \brief Sets the Endianss of the stream
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*
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* \param endian The Endianess to set \sa Endian
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*/
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void setEndian(Endian endian);
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/*! \brief Returns the current Endianness of the stream
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*
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* \return Endian The current Stream Endianess
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*/
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Endian endian() const;
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/*! \brief Returns whether the stream is BigEndian
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*
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* \return bool True for BigEndian; False for LittleEndian
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*/
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bool isBigEndian() const;
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/*! \brief Returns whether the stream is LittleEndian
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*
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* \return bool True for LittleEndian; False for BigEndian
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*/
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bool isLittleEndian()const;
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/*! \brief Retuns whether or not the Stream is open.
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*
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* \return True if open; False otherwise.
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*/
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bool isOpen() const;
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/*! \brief Sets the buffers position relative to the specified position.<br />
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* It seeks relative to the current position by default.
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* \param position where in the buffer to seek
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* \param origin The Origin to seek \sa SeekOrigin
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*/
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void seek(atInt64 pos, SeekOrigin origin = SeekOrigin::Current);
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/*! \brief Returns whether or not the stream is at the end.
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*
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* \return bool True if at end; False otherwise.
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*/
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bool atEnd() const;
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/*! \brief Returns the current position in the stream.
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*
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* \return Int64 The current position in the stream.
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*/
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atUint64 position() const;
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/*! \brief Returns whether or not the stream is at the end.
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*
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* \return bool True if at end; False otherwise.
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*/
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atUint64 length() const;
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/*! \brief Sets the buffer to the given one, deleting the current one.<br />
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* <b>BEWARE:</b> As this deletes the current buffer it WILL cause a loss of data
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* if that was not the intent.<br />
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* Once you pass the data to setData <b>DO NOT</b> delete the buffer
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* as Stream now owns the address, this is done to keep memory usage down.
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* \param data The new buffer.
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* \param length The length of the new buffer.
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* \throw IOException
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*/
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void setData(const atUint8* data, atUint64 length);
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/*! \brief Returns a copy of the current buffer.<br />
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* Changes to the copy do not affect the buffer so it's perfectly safe to
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* directly edit the buffer and use setData to set the new information.<br />
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* However once you pass the data to setData <b>DO NOT</b> delete the buffer
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* as Stream now owns the address, this is done to keep memory usage down.
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* \return Uint8* The copy of the buffer.
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*/
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atUint8* data() const;
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/*! \brief Sets the target file
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*
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* \param filepath The path to write to.
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*/
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void setFilepath(const std::string& filepath);
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/*! \brief
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* Returns the target file
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*/
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std::string filepath() const;
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/*! \brief Saves the file to the specified file.
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*
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* \param filename If not empty, the filename to save to
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*/
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void save(const std::string& filename="");
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/*!
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* \brief Seeks to the specified bit within the current byte
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* \param bit Bit to seek to, range is 0 - 7
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*/
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void seekBit(int bit);
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/*! \brief Writes a bit at the current position and advances the position by one bit.
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* \param val the value to write
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* \throw IOException
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*/
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void writeBit(bool val);
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/*! \brief Writes a byte at the current position and advances the position by one byte.
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* \param byte The value to write
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*/
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void writeUByte(atUint8 val);
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/*! \brief Writes a byte at the current position and advances the position by one byte.
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* \param byte The value to write
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* \throw IOException
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*/
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void writeByte(atInt8 val);
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/*! \brief Writes the given buffer with the specified length, buffers can be bigger than the length
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* however it's undefined behavior to try and write a buffer which is smaller than the given length.
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*
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* \param data The buffer to write
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* \param length The amount to write
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*/
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void writeUBytes(atUint8* data, atUint64 len);
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/*! \brief Writes the given buffer with the specified length, buffers can be bigger than the length
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* however it's undefined behavior to try and write a buffer which is smaller than the given length.
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*
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* \param data The buffer to write
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* \param length The amount to write
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*/
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void writeBytes(atInt8* data, atUint64 len);
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/*! \brief Writes an Int16 to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeInt16(atInt16 val);
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/*! \brief Writes an Uint16 to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeUint16(atUint16);
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/*! \brief Writes an Int32 to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeInt32(atInt32);
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/*! \brief Writes an Uint32 to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeUint32(atUint32);
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/*! \brief Writes an Int64 to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeInt64(atInt64);
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/*! \brief Writes an Uint64 to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeUint64(atUint64);
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/*! \brief Writes an float to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeFloat(float);
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/*! \brief Writes an double to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeDouble(double);
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/*! \brief Writes an bool to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param val The value to write to the buffer
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*/
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void writeBool(bool);
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/*! \brief Writes an unicode string to the buffer and advances the buffer.
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* It also swaps the bytes depending on the platform and Stream settings.
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*
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* \sa Endian
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* \param str The string to write to the buffer
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*/
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void writeUnicode(const std::string& str);
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/*! \brief Writes an string to the buffer and advances the buffer.
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*
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* \sa Endian
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* \param str The string to write to the buffer
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*/
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void writeString(const std::string& str);
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void fill(atUint8 val, atUint64 length);
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void fill(atInt8 val, atUint64 length);
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void setProgressCallback(std::function<void(int)> cb);
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protected:
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void loadData();
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atUint8* m_data;
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atUint64 m_length;
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std::string m_filepath; //!< Path to the target file
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atUint64 m_position;
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atUint64 m_bitPosition;
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Endian m_endian;
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std::function<void(int)> m_progressCallback;
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private:
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void resize(atUint64 newSize);
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};
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}
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}
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#ifndef MEMORYWRITER_BASE
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#define MEMORYWRITER_BASE() \
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private: \
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typedef Athena::io::MemoryWriter base
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#endif // BINARYWRITER_BASE
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#endif // MEMORYWRITER_HPP
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