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