Fix for #3849

Change-Id: I1aef5fdba72de0c3bb8276c9f50fffa494f26e29
Tested: on Linux.

Change-Id: Ie60f01d935ca6b4aa6ce0eab7598602ac0758342
Tested: on Linux.

This avoids the following allocations over repeated use:

- A ``CharsetEncoder``
- A byte array to contain the contents of the string
- A wrapper, via ``ByteBuffer#wrap``, for the previously mentioned byte
  array

This also removes a copy of the temporary byte array.  This extra copy
is needed because ``String#getBytes`` returns a byte array and its
length must match the exact size of the contents.

This implementation requires that the builder retain a ``ByteBuffer``
and ``CharEncoder``.  This is considered slower only for users that
will only allocate a single string in their buffers or none at all.

The improvement is especially potent if the builder is constantly reused
by its caller.  This also eliminates the penalty for users that do not
use strings at all since the cost of allocating these fields is
now amortized.

The only allocation left in this code is a ``CharBuffer`` wrapper.  It's
possible to eliminate this allocation using an additional copy but need
further profiling to see which is the bigger problem.

Change-Id: I8dcbb5e93836356511d411ef86452babd3dd3c0b
Tested: on Linux.

Fix for 3847

A previous commit that added "f" for C++/Java/C# would break
on gcc of constants like 3f, which are now output as 3.0f

Tested: on Linux

Change-Id: If9cabbe3c6d6948a5050b8b123bda9c06e181f52

Bug: 28145201
Change-Id: I5a1818c40c2f4fbd00cfec3362040407976f7a39
Tested: on Linux.

Stop CreateUninitializedVector returning a pointer to invalid memory.

CreateUninitializedVector was performing the following actions:
    1. call StartVector.
    2. call make_space, and set buf to point to the reserved space.
    3. call EndVector.

The problem is that a call to EndVector can ultimately call make_space, which
if the buffer is full, will cause a reallocation, invalidating the value stored
in buf.  So setting buf needs to be delayed until after EndVector.

The following code, when run under valgrind shows a write to free'd memory before
the change, but no such error after:

int main()
{
    flatbuffers::FlatBufferBuilder fbb(128);
    char *buf = nullptr;
    fbb.CreateUninitializedVector(128, &buf);
    *buf = 0;
}

Change-Id: I3730a6823d603982c4250d514e827e3f93d1f81e
Tested: on Linux.

Tested: on Linux.

Bug: 27923233
Change-Id: Ic16675650e4a8e138c163f1e2131a3aad7008ada

Change-Id: If34aef46ef619e06de799cff14948b02e98da86d
Tested: on Linux.

This was harmless, but unnecessary.

Change-Id: I1365a725e254d4ebbda081110a50277cb5118323
Tested: on Linux.

Allow builds on platforms with unsigned chars by default

Remove unnecessary condition in AssertOffsetAndLength.

Condition is already checked and covered in the following condition, the second one was excess.

Signed-off-by: Wojciech Jaszczak <jaszczakw@gmail.com>

Documentation for C bindings

Fix build on Cygwin

to allow for custom file loaders. The targeted use case is android runtime.

(from CL 116980408)

Change-Id: I8785c0acf714fab41d8f6fc9f1c52875423b8f5b

(from CL 116785833)

Change-Id: I0fb0e1318fd70cba51e229a93f535c6639bbb331

(from CL 117010760)

Change-Id: I0ee77cf87d0cb00b94887356745b85423b1375a6

This overflow could allow malformed FlatBuffers to pass the verifier.

Change-Id: Ia993299a761b00b93e53e8aff2689b631755763c
Tested: on Linux.
Bug: 27903580

use -std=gnu++11 instead of c++0x on cygwin to avoid
error: realpath was not declared in this scope

ref http://www.cygwin.com/ml/cygwin/2016-03/msg00005.html

Implement __vector_as_bytes and methods to get [ubyte] efficiently

Added --gen-name-strings command line option.

To support the use case described in issue google/flatbuffers#3826, a new command line option --gen-name-strings
has been added, which will cause a static GetFullyQualifiedName function to be added
to the C++ output for tables/structs.

Currently in order to get a value type of [ubyte] in PHP, iteration is
necessary which is not efficient. Helper __vector_as_bytes has been
implemented in order to return the byte arrays in PHP efficiently.

Appropriate methods also been added to use aforementioned method to return
the byte array. (e.g. get*Bytes()).

The reason the methods are named get*Bytes() and not for instance
get*ByteArray() is the fact that PHP doesn't support byte arrays and the
binary safe string implementation in PHP is used to simulate byte arrays
and since there is chance for PHP users to confuse this with PHP arrays
the name get*Bytes() has been chosen.

In the future __vector_as_bytebuffer() method can also be implemented to
return PHP implementation of ByteBuffer.