Avoids unnecessary initialization & unnecessary scan of
the pb_field_t array.

Runtime on Cortex-M3 -5%, code size +2%.

Could need some more testing with random field orders.
Have to write a tool to randomize fields in a message.

The arg field can be used to store the field presence from inside
the callback. Furthermore, having the has_ field for encoding callbacks
would be more annoying than useful.

Update issue 70
Status: FixedInGit

NOTE: This change breaks backwards-compatibility by default.
If you have old callback functions, you can define PB_OLD_CALLBACK_STYLE
to retain the old behaviour.

If you want to convert your old callbacks to new signature, you need
to do the following:

1) Change decode callback argument to   void **arg
      and encode callback argument to   void * const *arg.

2) Change any reference to arg into *arg.

The rationale for making the new behaviour the default is that it
simplifies the common case of "allocate some memory in decode callback".

Update issue 69
Status: FixedInGit

Update issue 67
Status: FixedInGit

Update issue 66
Status: FixedInGit

This allows replacing the C99 standard include file names with
a single system-specific file. It should provide all the necessary
system functions (typedefs, memset, memcpy, strlen).

Update issue 62
Status: FixedInGit

This avoids a name clash when compiling as Linux kernel module.

Update issue 60
Status: FixedInGit

Update issue 7
Status: FixedInGit

Update issue 12
Still needs documentation.

pb_field_next() would access past the fields array.

Enable -fstack-protector-all to detect any stack smashing bugs. Also
use test_decode3 for maximal vulnerable surface.

Note: the bug only applies to empty message types. Empty messages
of non-empty message types are not affected.

Update issue 65
Status: FixedInGit

Update issue 64
Status: FixedInGit

This suits complex projects, where there are multiple interdependent .proto files
in various directories. Patch by Michael Haberler.

Patch courtesy of Michael Haberler.

This way the .pb.h will remain cleaner and easier to read.

Also clean up the logic so that it is easier to implement more
allocation types in the future.

Update issue 53
Status: FixedInGit

This is a more logical name in parallel with PB_HTYPE_REQUIRED and PB_HTYPE_OPTIONAL.

Warning: This breaks backwards-compatibility of generated .pb.c files.
You will have to regenerate the files and recompile.

This has the following advantages:
1) Easier to modify pb_field_t encoding
2) Simpler generator logic
3) Tidier looking, easier to read .pb.c files

Update issue 58
Status: FixedInGit

This is a bit bloated gitignore file. Having binaries
in a separate build directory would be cleaner, but I don't
bother to make that change now.

See issue #57.

Error messages were not propagated correctly with PB_HTYPE_ARRAY.
Error status (boolean return value) was correct.

Update issue 56
Status: FixedInGit

Update issue 54
Status: FixedInGit

Update issue 50
Status: FixedInGit