pub type c_ptrdiff_t = isize;
c_size_t #88345)
Equivalent to C’s ptrdiff_t type, from stddef.h (or cstddef for C++).
This type is currently always isize, however in the future there may be platforms where this is not the case.
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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/ffi/type.c_ptrdiff_t.html