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authorGravatar Thomas Preud'homme2013-02-10 20:16:17 +0100
committerGravatar Nikias Bassen2013-02-10 20:16:17 +0100
commit7cbf283090ec273c006a14129eee8bba1885da58 (patch)
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Cast NULL in void * in functions using va_arg
NULL isn't necessary a zero value. For instance, on AMD64 architecture, a null pointer is 0x7fff00000000. Usually things works automagically as the compiler always cast NULL and 0 in void * if stored in a pointer variable. But with functions with variable number of arguments the compiler can't know the type of the arguments and thus don't make the cast. In consequences, NULL and 0 must be cast explicitely in void * if the parameter is a pointer.
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