From 39ed87570bdb2f86969d4be821c94b722dc71179 Mon Sep 17 00:00:00 2001
From: Joe Ludwig <joe@valvesoftware.com>
Date: Wed, 26 Jun 2013 15:22:04 -0700
Subject: First version of the SOurce SDK 2013

---
 mp/src/tier1/uniqueid.cpp | 177 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 177 insertions(+)
 create mode 100644 mp/src/tier1/uniqueid.cpp

(limited to 'mp/src/tier1/uniqueid.cpp')

diff --git a/mp/src/tier1/uniqueid.cpp b/mp/src/tier1/uniqueid.cpp
new file mode 100644
index 00000000..77082559
--- /dev/null
+++ b/mp/src/tier1/uniqueid.cpp
@@ -0,0 +1,177 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+// Unique ID generation
+//=============================================================================//
+
+#include "tier0/platform.h"
+
+#ifdef IS_WINDOWS_PC
+#include <windows.h> // UUIDCreate
+#else
+#include "checksum_crc.h"
+#endif
+#include "tier1/uniqueid.h"
+#include "tier1/utlbuffer.h"
+
+//-----------------------------------------------------------------------------
+// Creates a new unique id
+//-----------------------------------------------------------------------------
+void CreateUniqueId( UniqueId_t *pDest )
+{
+#ifdef IS_WINDOWS_PC
+	Assert( sizeof( UUID ) == sizeof( *pDest ) );
+	UuidCreate( (UUID *)pDest );
+#else
+	// X360/linux TBD: Need a real UUID Implementation
+	Q_memset( pDest, 0, sizeof( UniqueId_t ) );
+#endif
+}
+
+
+//-----------------------------------------------------------------------------
+// Creates a new unique id from a string representation of one
+//-----------------------------------------------------------------------------
+bool UniqueIdFromString( UniqueId_t *pDest, const char *pBuf, int nMaxLen )
+{
+	if ( nMaxLen == 0 )
+	{
+		nMaxLen = Q_strlen( pBuf );
+	}
+
+	char *pTemp = (char*)stackalloc( nMaxLen + 1 );
+	V_strncpy( pTemp, pBuf, nMaxLen + 1 );
+	--nMaxLen;
+	while( (nMaxLen >= 0) && isspace( pTemp[nMaxLen] ) )
+	{
+		--nMaxLen;
+	}
+	pTemp[ nMaxLen + 1 ] = 0;
+
+	while( *pTemp && isspace( *pTemp ) )
+	{
+		++pTemp;
+	}
+
+#ifdef IS_WINDOWS_PC
+	Assert( sizeof( UUID ) == sizeof( *pDest ) );
+
+	if ( RPC_S_OK != UuidFromString( (unsigned char *)pTemp, (UUID *)pDest ) )
+	{
+		InvalidateUniqueId( pDest );
+		return false;
+	}
+#else
+	// X360TBD: Need a real UUID Implementation
+	// For now, use crc to generate a unique ID from the UUID string.
+	Q_memset( pDest, 0, sizeof( UniqueId_t ) );
+	if ( nMaxLen > 0 )
+	{
+		CRC32_t crc;
+		CRC32_Init( &crc );
+		CRC32_ProcessBuffer( &crc, pBuf, nMaxLen );
+		CRC32_Final( &crc );
+		Q_memcpy( pDest, &crc, sizeof( CRC32_t ) );
+	}
+#endif
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Sets an object ID to be an invalid state
+//-----------------------------------------------------------------------------
+void InvalidateUniqueId( UniqueId_t *pDest )
+{
+	Assert( pDest );
+	memset( pDest, 0, sizeof( UniqueId_t ) );
+}
+
+bool IsUniqueIdValid( const UniqueId_t &id )
+{
+	UniqueId_t invalidId;
+	memset( &invalidId, 0, sizeof( UniqueId_t ) );
+	return !IsUniqueIdEqual( invalidId, id );
+}
+
+bool IsUniqueIdEqual( const UniqueId_t &id1, const UniqueId_t &id2 )
+{
+	return memcmp( &id1, &id2, sizeof( UniqueId_t ) ) == 0; 
+}
+
+void UniqueIdToString( const UniqueId_t &id, char *pBuf, int nMaxLen )
+{
+	pBuf[ 0 ] = 0;
+
+// X360TBD: Need a real UUID Implementation
+#ifdef IS_WINDOWS_PC
+	UUID *self = ( UUID * )&id;
+
+	unsigned char *outstring = NULL;
+
+	UuidToString( self, &outstring );
+	if ( outstring && *outstring )
+	{
+		Q_strncpy( pBuf, (const char *)outstring, nMaxLen );
+		RpcStringFree( &outstring );
+	}
+#endif
+}
+
+void CopyUniqueId( const UniqueId_t &src, UniqueId_t *pDest )
+{
+	memcpy( pDest, &src, sizeof( UniqueId_t ) );
+}
+
+bool Serialize( CUtlBuffer &buf, const UniqueId_t &src )
+{
+// X360TBD: Need a real UUID Implementation
+#ifdef IS_WINDOWS_PC
+	if ( buf.IsText() )
+	{
+		UUID *pId = ( UUID * )&src;
+
+		unsigned char *outstring = NULL;
+
+		UuidToString( pId, &outstring );
+		if ( outstring && *outstring )
+		{
+			buf.PutString( (const char *)outstring );
+			RpcStringFree( &outstring );
+		}
+		else
+		{
+			buf.PutChar( '\0' );
+		}
+	}
+	else
+	{
+		buf.Put( &src, sizeof(UniqueId_t) );
+	}
+	return buf.IsValid();
+#else
+	return false;
+#endif
+}
+
+bool Unserialize( CUtlBuffer &buf, UniqueId_t &dest )
+{
+	if ( buf.IsText() )
+	{
+		int nTextLen = buf.PeekStringLength();
+		char *pBuf = (char*)stackalloc( nTextLen );
+		buf.GetString( pBuf, nTextLen );
+		UniqueIdFromString( &dest, pBuf, nTextLen );
+	}
+	else
+	{
+		buf.Get( &dest, sizeof(UniqueId_t) );
+	}
+	return buf.IsValid();
+}
+
+
+
-- 
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