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| author | Victor Costan <costan@google.com> | 2021-08-16 18:22:31 +0000 |
|---|---|---|
| committer | Victor Costan <pwnall@chromium.org> | 2021-08-16 18:26:33 +0000 |
| commit | cbb83a1d64a5505c6fe8d505641109e405358a7d (patch) | |
| tree | 339214d7ad9a8a27d4d64aed78805bdebd9c926a /snappy-internal.h | |
| parent | a8400f1fabed965a9c52c0085e30f65ffa710961 (diff) | |
| download | snappy-git-cbb83a1d64a5505c6fe8d505641109e405358a7d.tar.gz | |
Migrate feature detection macro checks from #ifdef to #if.
The #if predicate evaluates to false if the macro is undefined, or
defined to 0. #ifdef (and its synonym #if defined) evaluates to false
only if the macro is undefined.
The new setup allows differentiating between setting a macro to 0 (to
express that the capability definitely does not exist / should not be
used) and leaving a macro undefined (to express not knowing whether a
capability exists / not caring if a capability is used).
PiperOrigin-RevId: 391094241
Diffstat (limited to 'snappy-internal.h')
| -rw-r--r-- | snappy-internal.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/snappy-internal.h b/snappy-internal.h index f1aafa9..8530071 100644 --- a/snappy-internal.h +++ b/snappy-internal.h @@ -153,8 +153,9 @@ char* CompressFragment(const char* input, // loading from s2 + n. // // Separate implementation for 64-bit, little-endian cpus. -#if !defined(SNAPPY_IS_BIG_ENDIAN) && \ - (defined(__x86_64__) || defined(_M_X64) || defined(ARCH_PPC) || defined(ARCH_ARM)) +#if !SNAPPY_IS_BIG_ENDIAN && \ + (defined(__x86_64__) || defined(_M_X64) || defined(ARCH_PPC) || \ + defined(ARCH_ARM)) static inline std::pair<size_t, bool> FindMatchLength(const char* s1, const char* s2, const char* s2_limit, |