About size_t and ptrdiff_t

Re:About size_t and ptrdiff_t by aCthrowa on Tuesday August 18, 2015 @01:24PM (#10080601)

This may be practically correct, but is semantically very very wrong.

size_t represents the size of objects in memory. So of course it scales with virtual memory space.

ssize_t is like size_t (same width), but signed. It's useful for routines that want to return a size_t or error (network routines like send/recv).

ptrdiff_t is specifically for the result of subtracting one pointer from another. Obviously it scales with pointer size as well.

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Re:About size_t and ptrdiff_t by tomvbussel on Tuesday August 18, 2015 @01:29PM (#10080649)

ssize_t is not a part of the C++ standard, sadly.

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Re:About size_t and ptrdiff_t by throwaCagain on Tuesday August 18, 2015 @01:31PM (#10080673)

Just POSIX :).

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Re:About size_t and ptrdiff_t by ben0x539 on Tuesday August 18, 2015 @01:30PM (#10080666)

ssize_t isn't standard C so it doesn't get you very far for portability.

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Re:About size_t and ptrdiff_t by throwaCagain on Tuesday August 18, 2015 @01:35PM (#10080709)

POSIX gets you pretty far.

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