mirror of https://github.com/libAthena/athena.git
206 lines
4.2 KiB
C++
206 lines
4.2 KiB
C++
#ifdef ATHENA_ENABLE_PHYSFS
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#include "athena/PHYSFSFileReader.hpp"
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#include "athena/FileNotFoundException.hpp"
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#include "athena/IOException.hpp"
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namespace athena
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{
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namespace io
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{
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PHYSFSFileReader::PHYSFSFileReader(const std::string& path)
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: m_path(path),
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m_endian(Endian::LittleEndian)
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{
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if (!PHYSFS_exists(m_path.c_str()))
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THROW_FILE_NOT_FOUND_EXCEPTION(path);
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m_handle = PHYSFS_openRead(path.c_str());
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m_length = PHYSFS_fileLength(m_handle);
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}
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atUint8* PHYSFSFileReader::data()
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{
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return readUBytes(length());
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}
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atUint64 PHYSFSFileReader::length() const
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{
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return m_length;
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}
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atUint64 PHYSFSFileReader::position() const
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{
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return PHYSFS_tell(m_handle);
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}
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bool PHYSFSFileReader::isOpen() const
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{
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return (m_handle != nullptr);
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}
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void PHYSFSFileReader::seek(atInt64 position, SeekOrigin origin)
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{
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atInt64 curPos = PHYSFS_tell(m_handle);
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switch (origin)
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{
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case SeekOrigin::Begin:
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if ((position < 0 || (atInt64)position > (atInt64)m_length))
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THROW_IO_EXCEPTION("Position %0.16X outside stream bounds ", position);
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PHYSFS_seek(m_handle, position);
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break;
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case SeekOrigin::Current:
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if ((((atInt64)curPos + position) < 0 || (curPos + position) > m_length))
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THROW_IO_EXCEPTION("Position %0.16X outside stream bounds ", position);
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PHYSFS_seek(m_handle, curPos + position);
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break;
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case SeekOrigin::End:
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if ((((atInt64)m_length - position < 0) || (m_length - position) > m_length))
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THROW_IO_EXCEPTION("Position %0.16X outside stream bounds ", position);
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PHYSFS_seek(m_handle, m_length - position);
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break;
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}
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}
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atUint8 PHYSFSFileReader::readUByte()
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{
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atUint8 val;
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if (!PHYSFS_read(m_handle, &val, 1, 1))
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THROW_IO_EXCEPTION("Position outside stream bounds");
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return val;
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}
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atInt8 PHYSFSFileReader::readByte()
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{
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return readUByte();
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}
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atUint8* PHYSFSFileReader::readUBytes(atUint64 length)
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{
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atUint8* data = new atUint8[length];
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if (PHYSFS_read(m_handle, data, 1, length) == length)
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return data;
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delete[] data;
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THROW_IO_EXCEPTION("Position outside stream bounds");
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}
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atInt8* PHYSFSFileReader::readBytes(atUint64 length)
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{
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return (atInt8*)readUBytes(length);
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}
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atUint16 PHYSFSFileReader::readUint16()
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{
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atUint16 val;
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if (m_endian == Endian::BigEndian)
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{
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if (!PHYSFS_readUBE16(m_handle, &val))
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THROW_IO_EXCEPTION("Position outside stream bounds");
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}
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else if (!PHYSFS_readULE16(m_handle, &val))
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THROW_IO_EXCEPTION("Position outside stream bounds");
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return val;
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}
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atInt16 PHYSFSFileReader::readInt16()
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{
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return readUint16();
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}
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atUint32 PHYSFSFileReader::readUint32()
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{
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atUint32 val;
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if (m_endian == Endian::BigEndian)
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{
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if (!PHYSFS_readUBE32(m_handle, &val))
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THROW_IO_EXCEPTION("Position outside stream bounds");
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}
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else if (!PHYSFS_readULE32(m_handle, &val))
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THROW_IO_EXCEPTION("Position outside stream bounds");
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return val;
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}
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atInt32 PHYSFSFileReader::readInt32()
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{
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return readUint32();
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}
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atUint64 PHYSFSFileReader::readUint64()
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{
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atUint64 val;
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if (m_endian == Endian::BigEndian)
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{
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if (!PHYSFS_readUBE64(m_handle, &val))
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THROW_IO_EXCEPTION("Position outside stream bounds");
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}
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else if (!PHYSFS_readUBE64(m_handle, &val))
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THROW_IO_EXCEPTION("Position outside stream bounds");
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return val;
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}
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atInt64 PHYSFSFileReader::readInt64()
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{
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return readUint64();
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}
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double PHYSFSFileReader::readDouble()
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{
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return static_cast<double>(readUint64());
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}
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float PHYSFSFileReader::readFloat()
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{
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return static_cast<float>(readUint32());
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}
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bool PHYSFSFileReader::readBool()
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{
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return (readByte() != 0);
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}
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bool PHYSFSFileReader::atEnd() const
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{
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return PHYSFS_eof(m_handle);
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}
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void PHYSFSFileReader::setEndian(Endian endian)
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{
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m_endian = endian;
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}
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Endian PHYSFSFileReader::endian() const
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{
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return m_endian;
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}
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bool PHYSFSFileReader::isBigEndian() const
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{
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return m_endian == Endian::BigEndian;
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}
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bool PHYSFSFileReader::isLittleEndian() const
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{
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return m_endian == Endian::LittleEndian;
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}
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}
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}
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#endif
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