forked from valve/halflife-sdk
58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
// steam_util.h
|
|
// Steam utility classes
|
|
// Author: Michael S. Booth (mike@turtlerockstudios.com), April 2003
|
|
|
|
#ifndef _STEAM_UTIL_H_
|
|
#define _STEAM_UTIL_H_
|
|
|
|
//--------------------------------------------------------------------------------------------------------------
|
|
/**
|
|
* Used to load a file via Steam
|
|
*/
|
|
class SteamFile
|
|
{
|
|
public:
|
|
SteamFile( const char *filename );
|
|
~SteamFile();
|
|
|
|
bool IsValid( void ) const { return (m_fileData) ? true : false; } ///< returns true if this file object is attached to a file
|
|
bool Read( void *data, int length ); ///< read 'length' bytes from the file
|
|
|
|
private:
|
|
byte *m_fileData; ///< the file read into memory
|
|
int m_fileDataLength; ///< the length of the file
|
|
|
|
byte *m_cursor; ///< where we are in the file
|
|
int m_bytesLeft; ///< the number of bytes left in the file
|
|
};
|
|
|
|
inline SteamFile::SteamFile( const char *filename )
|
|
{
|
|
m_fileData = (byte *)LOAD_FILE_FOR_ME( const_cast<char *>( filename ), &m_fileDataLength );
|
|
m_cursor = m_fileData;
|
|
m_bytesLeft = m_fileDataLength;
|
|
}
|
|
|
|
inline SteamFile::~SteamFile()
|
|
{
|
|
if (m_fileData)
|
|
FREE_FILE( m_fileData );
|
|
}
|
|
|
|
inline bool SteamFile::Read( void *data, int length )
|
|
{
|
|
if (length > m_bytesLeft || m_cursor == NULL || m_bytesLeft <= 0)
|
|
return false;
|
|
|
|
byte *readCursor = static_cast<byte *>( data );
|
|
|
|
for( int i=0; i<length; ++i )
|
|
{
|
|
*readCursor++ = *m_cursor++;
|
|
--m_bytesLeft;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
#endif // _STEAM_UTIL_H_
|