Could you please give an example where this would help? I am tired, but it sounds to me like you're trying to fix 

typedef size_t STRLEN;
IV     iv  = -12;
STRLEN len = iv;
memcpy(src, dst, len);

[download]
with 
typedef ptrdiff_t STRLEN;
IV     iv  = -12;
STRLEN len = iv;
memcpy(src, dst, (size_t)len);

[download]

Of course, that doesn't work. I don't see a case where casting would help. There's a reason casting is cheap.

In reply to Re^9: [OT] LLP64 .v. LP64 portability by ikegami
in thread [OT] LLP64 .v. LP64 portability by BrowserUk

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