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131 lines
2.5 KiB
C++
131 lines
2.5 KiB
C++
/*
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* libsmackerdec - Smacker video decoder
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* Copyright (C) 2011 Barry Duncan
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "FileStream.h"
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#include <stdlib.h>
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namespace SmackerCommon {
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bool FileStream::Open(const std::string &fileName)
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{
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file = kopen4loadfrommod(fileName.c_str(), 0);
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if (file == -1)
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{
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// log error
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return false;
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}
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return true;
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}
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bool FileStream::Is_Open()
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{
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return file != -1;
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}
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void FileStream::Close()
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{
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kclose(file);
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file = -1;
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}
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int32_t FileStream::ReadBytes(uint8_t *data, uint32_t nBytes)
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{
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uint32_t nCount = (uint32_t)kread(file, data, static_cast<int32_t>(nBytes));
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if (nCount != nBytes)
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{
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return 0;
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}
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return (int32_t)nCount;
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}
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uint32_t FileStream::ReadUint32LE()
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{
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uint32_t value;
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kread(file, &value, 4);
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return B_LITTLE32(value);
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}
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uint32_t FileStream::ReadUint32BE()
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{
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uint32_t value;
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kread(file, &value, 4);
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return B_BIG32(value);
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}
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uint16_t FileStream::ReadUint16LE()
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{
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uint16_t value;
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kread(file, &value, 2);
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return B_LITTLE16(value);
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}
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uint16_t FileStream::ReadUint16BE()
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{
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uint16_t value;
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kread(file, &value, 2);
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return B_BIG16(value);
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}
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uint8_t FileStream::ReadByte()
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{
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uint8_t value;
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kread(file, &value, 1);
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return value;
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}
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bool FileStream::Seek(int32_t offset, SeekDirection direction)
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{
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int32_t nStatus = -1;
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if (kSeekStart == direction) {
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nStatus = klseek(file, offset, SEEK_SET);
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}
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else if (kSeekCurrent == direction) {
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nStatus = klseek(file, offset, SEEK_CUR);
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}
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// TODO - end seek
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if (nStatus < 0)
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{
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// todo
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return false;
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}
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return true;
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}
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bool FileStream::Skip(int32_t offset)
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{
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return Seek(offset, kSeekCurrent);
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}
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bool FileStream::Is_Eos()
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{
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// TODO:
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return false;
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}
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int32_t FileStream::GetPosition()
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{
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return ktell(file);
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}
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} // close namespace SmackerCommon
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