在 2018/12/17 23:15, Zebediah Figura 写道: > This provides memcmp() for kernel-mode drivers, which for some reason > is not exported from ntoskrnl like other crt functions. > > The implementation was copied from wmemcmp.c in libmingwex. > > Signed-off-by: Zebediah Figura <[email protected]> > ---
> + for ( ; 0 < _N; ++_S1, ++_S2, --_N) > + if (*_S1 != *_S2) > + return (*_S1 < *_S2 ? -1 : +1); > + > + return 0; > +} > + You must compare `*_S1` and `*_S2` as `unsigned char` as described below: ``` ISO/IEC WG14 N2176 7.24.4 Comparison functions 1 The sign of a nonzero value returned by the comparison functions memcmp, strcmp, and strncmp is determined by the sign of the difference between the values of the first pair of characters (both interpreted as unsigned char) that differ in the objects being compared. ``` -- Best regards, LH_Mouse
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