Some users may require a valid DEFLATE, zlib, or gzip stream but know
ahead of time that particular inputs are not compressible. zlib
supports "level 0" for this use case. Support this in libdeflate too.
Resolves https://github.com/ebiggers/libdeflate/issues/86
Additionally, libdeflate_zlib_decompress now returns successfully in
case there are additional trailing bytes in the input buffer after the
compressed stream.
Unfortunately, MSVC only accepts __stdcall after the return type, while
gcc only accepts __attribute__((visibility("default"))) before the
return type. So we need a macro in each location.
Also, MSVC doesn't define __i386__; that's gcc specific. So instead use
'_WIN32 && !_WIN64' to detect 32-bit Windows.
Not all programming languages support the cdecl calling convention.
stdcall is what the Win32 API uses, and it seems to be the better choice
for maximum compatibility with other programming languages.
So, switch from cdecl to stdcall.
Resolves https://github.com/ebiggers/libdeflate/issues/58
It was reported that API symbols were being "exported" from the static
library built with MSVC, causing them to remain exported after being
linked into another program. It turns out this was actually a problem
outside of MSVC as well. The solution is to always build the static and
shared libraries from different object files, where the API symbols are
exported from the shared library object files but not from the static
library object files.
Reported-by: Joergen Ibsen <ji@ibse.dk>
