When building Snappy with compiler option `-Wsuggest-override` set
via the CMAKE_CXX_FLAGS, compilation produces warnings in
`snappy-sinksource.h`:
```
In file included from ./snappy-fork/snappy-sinksource.cc:32:
./snappy-fork/snappy-sinksource.h:150:18: error: ‘virtual size_t snappy::ByteArraySource::Available() const’ can be marked override [-Werror=suggest-override]
150 | virtual size_t Available() const;
| ^~~~~~~~~
./snappy-fork/snappy-sinksource.h:151:23: error: ‘virtual const char* snappy::ByteArraySource::Peek(size_t*)’ can be marked override [-Werror=suggest-override]
151 | virtual const char* Peek(size_t* len);
| ^~~~
./snappy-fork/snappy-sinksource.h:152:16: error: ‘virtual void snappy::ByteArraySource::Skip(size_t)’ can be marked override [-Werror=suggest-override]
152 | virtual void Skip(size_t n);
| ^~~~
./snappy-fork/snappy-sinksource.h:163:16: error: ‘virtual void snappy::UncheckedByteArraySink::Append(const char*, size_t)’ can be marked override [-Werror=suggest-override]
163 | virtual void Append(const char* data, size_t n);
| ^~~~~~
./snappy-fork/snappy-sinksource.h:164:17: error: ‘virtual char* snappy::UncheckedByteArraySink::GetAppendBuffer(size_t, char*)’ can be marked override [-Werror=suggest-override]
164 | virtual char* GetAppendBuffer(size_t len, char* scratch);
| ^~~~~~~~~~~~~~~
./snappy-fork/snappy-sinksource.h:165:17: error: ‘virtual char* snappy::UncheckedByteArraySink::GetAppendBufferVariable(size_t, size_t, char*, size_t, size_t*)’ can be marked override [-Werror=suggest-override]
165 | virtual char* GetAppendBufferVariable(
| ^~~~~~~~~~~~~~~~~~~~~~~
./snappy-fork/snappy-sinksource.h:168:16: error: ‘virtual void snappy::UncheckedByteArraySink::AppendAndTakeOwnership(char*, size_t, void (*)(void*, const char*, size_t), void*)’ can be marked override [-Werror=suggest-override]
168 | virtual void AppendAndTakeOwnership(
| ^~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
```
This PR adds the missing override specifiers to the sink
implementations, so compilation works fine again.
Tested it with g++-9.3 and g++-10.2.
Compatibility note:
Override specifiers were introduced with C++11, which Snappy seems
to effectively require, at least according to its CMakeLists.txt file
and due to the usage of some C++11-only STL types in its tests.
Replace the Apache 2.0 license header by the BSD-type license header;
somehow a lot of the files were missed in the last round.
R=dannyb,csilvers
DELTA=147 (74 added, 2 deleted, 71 changed)
Change on 2011-03-25 19:25:07-07:00 by sesse
Unbreak the build; the relicensing removed a bit too much (only comments
were intended, but I also accidentially removed some of the top lines of
the actual source).
Revision created by MOE tool push_codebase.
MOE_MIGRATION=1072
git-svn-id: https://snappy.googlecode.com/svn/trunk@21 03e5f5b5-db94-4691-08a0-1a8bf15f6143
