Nope. But I do know of at least one implementation where it's not present at all—msvcrt. ssize_t isn't specified in the c standard, it's part of posix. ptrdi

Nope. But I do know of at least one implementation where it's not present at all—msvcrt. ssize_t isn't specified in the c standard, it's part of posix. ptrdiff_t is standard.