* `fopen_s`, `freopen_s` deviate in the API: restrict is missing.
* `strtok_s`, `wcstok_s`,`vsnprintf_s` miss the dmax argument.
* `vsnprintf_s` adds a maxarg argument.
* `vswprintf` adds a maxarg argument on w32. (with `__STRICT_ANSI__` undefined)
* no `strnlen` on mingw32.
* no `errno_t` return type for `qsort_s`, only `void`.
* reversed argument order for `localtime_s` and `gmtime_s`.
* older mingw versions have `wchar.h` with only 2 functions: `wcscmp`, `wcslen`
* no `RSIZE_MAX`
* `memmove_s` does not clear dest with ERANGE when `count > dmax` and EINVAL when src is a NULL pointer.
* `vsprintf_s`, `sprintf_s` return `-1` on all errors, not just encoding errors. (Wrong standard)
* With `wcsrtombs` (used by `wcsrtomb_s`) the `retval` result includes the terminating zero, i.e. the result is `+1` from the spec.
`getenv_s` returns in len the size of the env buffer, not the len, as described in the standard (https://en.cppreference.com/w/c/program/getenv). The Microsoft size is len + 1. Their usage example is also wrong: https://learn.microsoft.com/en-us/cpp/c-runtime-library/refe...
* `fopen_s`, `freopen_s` deviate in the API: restrict is missing.
* `strtok_s`, `wcstok_s`,`vsnprintf_s` miss the dmax argument.
* `vsnprintf_s` adds a maxarg argument.
* `vswprintf` adds a maxarg argument on w32. (with `__STRICT_ANSI__` undefined)
* no `strnlen` on mingw32.
* no `errno_t` return type for `qsort_s`, only `void`.
* reversed argument order for `localtime_s` and `gmtime_s`.
* older mingw versions have `wchar.h` with only 2 functions: `wcscmp`, `wcslen`
* no `RSIZE_MAX`
* `memmove_s` does not clear dest with ERANGE when `count > dmax` and EINVAL when src is a NULL pointer.
* `vsprintf_s`, `sprintf_s` return `-1` on all errors, not just encoding errors. (Wrong standard)
* With `wcsrtombs` (used by `wcsrtomb_s`) the `retval` result includes the terminating zero, i.e. the result is `+1` from the spec.
`getenv_s` returns in len the size of the env buffer, not the len, as described in the standard (https://en.cppreference.com/w/c/program/getenv). The Microsoft size is len + 1. Their usage example is also wrong: https://learn.microsoft.com/en-us/cpp/c-runtime-library/refe...