> Non-equality comparison of pointers is defined if and only if the pointers > are both addresses in the same contiguous structure I'm not sure that the proposed alternative (casting both pointers to ints and comparing the ints) is any better. Does the C std define the result of doing that to two unrelated pointers? Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg@cosc.canterbury.ac.nz +--------------------------------------+
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