delete upb_EnumDef_IsSorted()
We now have a simple internal function for returning a mini descriptor directly from an enum def.
PiperOrigin-RevId: 461208352
1. upb now tolerates a present-but-empty package name in a `FileDescriptorProto`.
2. upb now always returns a non-NULL string for `upb_FileDef_Package()`. If the package was empty or missing, the returned string is zero-length. This better matches the proto2 behavior: `proto2::FileDescriptor::package()` always returns a package string, which may be empty.
PiperOrigin-RevId: 460831797
- Correctly set the modifier field for MessageDefs
- Add error handling
- Respect the provided arena, stop hardwiring the global alloc
- upb_MiniDescriptor_EncodeExtension() is now upb_MiniDescriptor_EncodeField()
- Make the plugin code a lot easier to read
PiperOrigin-RevId: 460482002
Internal array functions are now implemented in upb/internal/array.c and declared in
upb/internal/array.h, which only has local visibility.
PiperOrigin-RevId: 458260144
some headers were not including port_def.inc
some headers were not declaring extern "C"
some headers were backing out of the above in the wrong order
PiperOrigin-RevId: 457391878
Now that 'size' has been renamed as 'capacity' we are free to rename 'len' as
'size', so upb_Array_Size() is actually returning the 'size' field.
PiperOrigin-RevId: 456865972
The current field/function names for upb_Array are quite confusing.
We will fix them in two steps, this being the first step.
PiperOrigin-RevId: 456687224
Lots of changes but it's all just moving things around.
Backward-compatible stub #include's have been provided for now.
upb_Arena/upb_Status have been split out from upb/upb.?
upb_Array/upb_Map/upb_MessageValue have been split out from upb/collections.?
upb_ExtensionRegistry has been split out from upb/msg.?
upb/decode_internal.h is now upb/internal/decode.h
upb/mini_table_accessors_internal.h is now upb/internal/mini_table_accessors.h
upb/table_internal.h is now upb/internal/table.h
upb/upb_internal.h is now upb/internal/upb.h
PiperOrigin-RevId: 456297617
upb has traditionally returned 16-byte-aligned pointers from arena allocation. This was out of an abundance of caution, since users could theoretically be using upb arenas to allocate memory that is then used for SSE/AVX values (eg. [`__m128`](https://docs.microsoft.com/en-us/cpp/cpp/m128?view=msvc-170), which require 16-byte alignment.
In practice, the protobuf C++ arena has used 8-byte alignment for 8 years with no significant problems I know of arising from SSE etc.
Reducing the alignment requirement to 8 will save memory. It will also help with compatibility on 32-bit architectures where `malloc()` only returns 8-byte aligned memory. The immediate motivation is to fix the win32 build for Python protobuf.
PiperOrigin-RevId: 448331777
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