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engine/snd_io.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//===========================================================================//
+#include "tier2/riff.h"
+#include "snd_io.h"
+#include "filesystem.h"
+#include "filesystem_engine.h"
+#include "tier1/strtools.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+//-----------------------------------------------------------------------------
+// Purpose: Implements Audio IO on the engine's COMMON filesystem
+//-----------------------------------------------------------------------------
+class COM_IOReadBinary : public IFileReadBinary
+{
+public:
+	int open( const char *pFileName );
+	int read( void *pOutput, int size, int file );
+	void seek( int file, int pos );
+	unsigned int tell( int file );
+	unsigned int size( int file );
+	void close( int file );
+};
+
+
+// prepend sound/ to the filename -- all sounds are loaded from the sound/ directory
+int COM_IOReadBinary::open( const char *pFileName )
+{
+	char namebuffer[512];
+	FileHandle_t hFile;
+	Q_strncpy( namebuffer, "sound", sizeof( namebuffer ) );
+
+	// the server is sending back sound names with slashes in front... 
+	if ( pFileName[0] != '/' && pFileName[0] != '\\' )
+	{
+		Q_strncat( namebuffer, "/", sizeof( namebuffer ), COPY_ALL_CHARACTERS );
+	}
+
+	Q_strncat( namebuffer, pFileName, sizeof( namebuffer ), COPY_ALL_CHARACTERS );
+
+	hFile = g_pFileSystem->Open( namebuffer, "rb", "GAME" );
+
+	return (int)hFile;
+}
+
+int COM_IOReadBinary::read( void *pOutput, int size, int file )
+{
+	if ( !file )
+		return 0;
+
+	return g_pFileSystem->Read( pOutput, size, (FileHandle_t)file );
+}
+
+void COM_IOReadBinary::seek( int file, int pos )
+{
+	if ( !file )
+		return;
+
+	g_pFileSystem->Seek( (FileHandle_t)file, pos, FILESYSTEM_SEEK_HEAD );
+}
+
+unsigned int COM_IOReadBinary::tell( int file )
+{
+	if ( !file )
+		return 0;
+
+	return g_pFileSystem->Tell( (FileHandle_t)file );
+}
+
+unsigned int COM_IOReadBinary::size( int file )
+{
+	if (!file)
+		return 0;
+
+	return g_pFileSystem->Size( (FileHandle_t)file );
+}
+
+void COM_IOReadBinary::close( int file )
+{
+	if (!file)
+		return;
+
+	g_pFileSystem->Close( (FileHandle_t)file );
+}
+
+static COM_IOReadBinary io;
+IFileReadBinary *g_pSndIO = &io;
+