Upgrade ffi to 1.0.0

[narumi147]

current master and dev branch of flutter is not compatible with ffi 0.1.3, almost all packages depends on ffi and ffi itself will build failed. It was warning before not error.

...../win32-1.7.4/lib/src/structs.dart:2999:7: Error: Struct 'NLM_SIMULATED_PROFILE_INFO' is empty. Empty structs are undefined behavior.
class NLM_SIMULATED_PROFILE_INFO extends Struct {}                      
      ^                                                                 
...../ffi-0.1.3/lib/src/allocation.dart:47:33: Error: Expected type 'T' to be a valid and instantiated subtype of 'NativeType'.
  final int totalSize = count * sizeOf<T>();

The top level functions free and allocate are moved into abstract class in ffi 1.0.0

[narumi147]

maybe related issue
dart-lang/sdk#44622
dart-lang/sdk#44621

[ekibun]

Thanks!

[narumi147]

BTW, when building/hot restart an app with this qjs package, a lot of warnings (mostly number type related like long, int, size_t) will be generated.

Is this usual and allowed for c/c++ program without type cast? I am not familiar with c++, just try to clear the doubts. Thanks.

[Sunbreak]

Wonderful project!

Have you encounter array problem in Struct, i.e. dart-lang/native#506

// C struct
struct TW_VERSION {
  char[34] info;
}

// dart class
class TW_VERSION extends Stuct {}

I could get the struct address but fail to perform static_cast like operation on it