在 2022-12-04 21:49, Pali Rohár 写道:
Format attributes is interesting issue. Because there are already following printf implementations:1) C89 (without %lld) (crtdll.dll, msvcrt10.dll) 2) C89 (without %lld) + MS extensions %I64d (msvcrt20.dll - msvcr110.dll) 3) C99 (with %lld) + MS extensions %I64d (msvcr120.dll, vcruntime140.dll) 4) C99 (with %lld) + GNU extensions (this is what glibc has) 5) C99 (with %lld) + MS extensions + GNU extensions (mingw-w64 pformat.c)
This is not 100% correct. The MS printf specification never conforms to the C99 standard: 1) `%hhd` expects a `short` instead of `signed char`, verified with MSVCR120 and MSVCRT on Win10. 2) `%zd`, `%td`, `%jd` are all unsupported up to MSVCR120, which, however, MSVCRT on Win10 seems to support. 3) `%Lg` matches `long double` in MS ABI i.e. the same with `double`. I don't think it's practically possible to provide unified non-inline *printf functions. -- Best regards, LIU Hao
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