backporting of commit: f2803aba

- use relative paths for includes
- fix PCH generation with GCC (dummy file has been used)

- use relative paths for includes
- fix PCH generation with GCC (dummy file has been used)

backporting of commit: 45428b89

- exceptions from constructor will not cause destructor calls

Seeking outside of the current block doesn't update actual data,
so getByte()/etc will get wrong data from stalled buffer.

oss-fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13292

oss-fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13285

2Gb+ images can't be handled properly by current implementation

backporting of commit: 50a6f9d2

2Gb+ images can't be handled properly by current implementation

ozz-fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13295

required for close calls.

- don't share .cpp files (PCH support is broken)