ReGameDLL_CS/regamedll/game_shared/steam_util.h

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/*
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* In addition, as a special exception, the author gives permission to
* link the code of this program with the Half-Life Game Engine ("HL
* Engine") and Modified Game Libraries ("MODs") developed by Valve,
* L.L.C ("Valve"). You must obey the GNU General Public License in all
* respects for all of the code used other than the HL Engine and MODs
* from Valve. If you modify this file, you may extend this exception
* to your version of the file, but you are not obligated to do so. If
* you do not wish to do so, delete this exception statement from your
* version.
*
*/
#pragma once
class SteamFile
{
public:
SteamFile(const char *filename);
~SteamFile();
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bool IsValid() const { return (m_fileData) ? true : false; }
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bool Read(void *data, int length);
private:
byte *m_fileData;
int m_fileDataLength;
byte *m_cursor;
int m_bytesLeft;
};
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inline SteamFile::SteamFile(const char *filename)
{
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m_fileData = (byte *)LOAD_FILE_FOR_ME(const_cast<char *>(filename), &m_fileDataLength);
m_cursor = m_fileData;
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m_bytesLeft = m_fileDataLength;
}
inline SteamFile::~SteamFile()
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{
if (m_fileData)
{
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FREE_FILE(m_fileData);
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m_fileData = nullptr;
}
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}
inline bool SteamFile::Read(void *data, int length)
{
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if (length > m_bytesLeft || !m_cursor || m_bytesLeft <= 0)
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return false;
byte *readCursor = static_cast<byte *>(data);
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for (int i = 0; i < length; i++)
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{
*readCursor++ = *m_cursor++;
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m_bytesLeft--;
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}
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return true;
}