Function ptr2int

ccan/ccan/ptrint/ptrint.h:19–28

typedef struct ptrint ptrint_t;

CONST_FUNCTION static inline ptrdiff_t ptr2int(const ptrint_t *p)
{
	/*
	 * ptrdiff_t is the right size by definition, but to avoid
	 * surprises we want a warning if the user can't fit at least
	 * a regular int in there
	 */
	BUILD_ASSERT(sizeof(int) <= sizeof(ptrdiff_t));
	return (const char *)p - (const char *)NULL;
}

CONST_FUNCTION static inline ptrint_t *int2ptr(ptrdiff_t i)
{