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| author | Edward Thomson <ethomson@edwardthomson.com> | 2019-01-20 13:51:15 +0000 |
|---|---|---|
| committer | Edward Thomson <ethomson@edwardthomson.com> | 2019-01-20 13:51:15 +0000 |
| commit | abbc07f12fdf1444c8aa0c161f3dfa8a494b7dff (patch) | |
| tree | 4301ec3c81318c7c2c4e7a92c28bddbf3159cec4 | |
| parent | c6d47acfbfd514a12ac9fb14c87a247da7bfbf1d (diff) | |
| download | libgit2-abbc07f12fdf1444c8aa0c161f3dfa8a494b7dff.tar.gz | |
add with overflow: use SizeTAdd on Windows
Windows provides <intsafe.h> which provides "performant" add and
multiply with overflow operations. Use them when possible.
| -rw-r--r-- | src/integer.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/integer.h b/src/integer.h index 144a21bd8..12e71f76a 100644 --- a/src/integer.h +++ b/src/integer.h @@ -65,6 +65,16 @@ GIT_INLINE(int) git__is_int(long long p) # error compiler has add with overflow intrinsics but SIZE_MAX is unknown # endif +/* Use Microsoft's safe integer handling functions where available */ +#elif defined(_MSC_VER) + +# include <intsafe.h> + +# define git__add_sizet_overflow(out, one, two) \ + (SizeTAdd(one, two, out) != S_OK) +# define git__multiply_sizet_overflow(out, one, two) \ + (SizeTMult(one, two, out) != S_OK) + #else /** |