[Bug #19390]
We shouldn't check the string length when skipping zeros, as the
string might only contains zero characters, resulting in an empty string.
... because BDIGIT_DBL may be long long. POSFIXABLE and NEGFIXABLE
ensures that the value is representable as long, but it failed to build
on emscripten with -Werror -Wshorten-64-to-32.
It uses random to determine if the bignum is sparse or not.
It is arguable if three-digit samples are enough or not to determine it,
but anyway, consuming Random source implicitly is not good.
I introduced the random sampling mechanism, and I don't know any
significant reason to do so. So, let's remove it.
This change makes the sampling points fixed: 40th, 50th, and 60th
percentiles.
Starting GCC 7, warnings about uninitialized variables are issued around
them. Such warnings could be false positives (all versions of clang do
not warn), but adding initializers there could never be bad things.
I struggled figuring out which of the pack/unpack functions goes into which direction and the two first sentences were of the documentation were:
* Import an integer into a buffer.
* Export an integer into a buffer.
It sounds like both of them go from a ruby integer to a buffer because both use "into". So I fixed it and went to "Import an integer from a buffer". I find this much more clear.
Saves comitters' daily life by avoid #include-ing everything from
internal.h to make each file do so instead. This would significantly
speed up incremental builds.
We take the following inclusion order in this changeset:
1. "ruby/config.h", where _GNU_SOURCE is defined (must be the very
first thing among everything).
2. RUBY_EXTCONF_H if any.
3. Standard C headers, sorted alphabetically.
4. Other system headers, maybe guarded by #ifdef
5. Everything else, sorted alphabetically.
Exceptions are those win32-related headers, which tend not be self-
containing (headers have inclusion order dependencies).
With these macros implemented we can write codes just like we can assume
the compiler being clang. MSC_VERSION_SINCE is defined to implement
those macros, but turned out to be handy for other places. The -fdeclspec
compiler flag is necessary for clang to properly handle __has_declspec().
These functions are used from within a compilation unit so we can
make them static, for better binary size. This changeset reduces
the size of generated ruby binary from 26,590,128 bytes to
26,584,472 bytes on my macihne.
git
Nobuyoshi Nakada
Matt Valentine-House
Takashi Kokubun
Jean Boussier
S-H-GAMELINKS
Peter Zhu
Yusuke Endoh
Marcus Stollsteimer
Kazuhiro NISHIYAMA
卜部昌平
Bernhard F. Brodowsky
Kenta Murata