Enumeration of NULL terminated Varargs

gistfile1.c

#define ENUMERATE_NULL_TERMINATED_VARARGS(firstArgument, type, argumentName, operation) \
{ \
    va_list arguments; \
    va_start(arguments, firstArgument); \
    type argumentName = firstArgument; \
    while (argumentName) \
    { \
        { \
            operation \
        } \
        argumentName = va_arg(arguments, GLenum); \
    } \
    va_end(arguments); \
}