IexMacros.h

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// *       Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// *       Redistributions in binary form must reproduce the above
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// in the documentation and/or other materials provided with the
// distribution.
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// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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///////////////////////////////////////////////////////////////////////////



#ifndef INCLUDED_IEXMACROS_H
#define INCLUDED_IEXMACROS_H

//--------------------------------------------------------------------
//
//	Macros which make throwing exceptions more convenient
//
//--------------------------------------------------------------------

#include <sstream>


//----------------------------------------------------------------------------
// A macro to throw exceptions whose text is assembled using stringstreams.
//
// Example:
//
//	THROW (InputExc, "Syntax error in line " << line ", " << file << ".");
//
//----------------------------------------------------------------------------

#define THROW(type, text)	\
    do				\
    {				\
    std::stringstream s;	\
    s << text;		\
    throw type (s);		\
    }				\
    while (0)


//----------------------------------------------------------------------------
// Macros to add to or to replace the text of an exception.
// The new text is assembled using stringstreams.
//
// Examples:
//
// Append to end of an exception's text:
//
//	catch (BaseExc &e)
//	{
//	    APPEND_EXC (e, " Directory " << name << " does not exist.");
//	    throw;
//	}
//
// Replace an exception's text:
//
//	catch (BaseExc &e)
//	{
//	    REPLACE_EXC (e, "Directory " << name << " does not exist. " << e);
//	    throw;
//	}
//----------------------------------------------------------------------------

#define APPEND_EXC(exc, text)	\
    do				\
    {				\
    std::stringstream s;	\
    s << text;		\
    exc.append (s);		\
    }				\
    while (0)

#define REPLACE_EXC(exc, text)	\
    do				\
    {				\
    std::stringstream s;	\
    s << text;		\
    exc.assign (s);		\
    }				\
    while (0)


//-------------------------------------------------------------
// A macro to throw ErrnoExc exceptions whose text is assembled
// using stringstreams:
//
// Example:
//
//	THROW_ERRNO ("Cannot open file " << name << " (%T).");
//
//-------------------------------------------------------------

#define THROW_ERRNO(text)		\
    do					\
    {					\
    std::stringstream s;		\
    s << text;			\
    ::Iex::throwErrnoExc (s.str());	\
    }					\
    while (0)


//-------------------------------------------------------------
// A macro to throw exceptions if an assertion is false.
//
// Example:
//
//	ASSERT (ptr != NULL, NullExc, "Null pointer" );
//
//-------------------------------------------------------------

#define ASSERT(assertion, type, text)   \
    do                                  \
    {                                   \
    if ((assertion) == false)       \
        THROW (type, text);         \
    }                                   \
    while (0)


#endif