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2018-07-18Add pdfium::span::as_bytes() and as_writable_bytes().Tom Sepez
Picks up some enhancements from base/span.h. In turn, also adds the size_bytes() helper. Differs from base version in that it works around C++14 enable_if_t<>, and avoids the dynamic_extent template specialization tricks. Use it in a few places where appropriate. Change-Id: I86f72cf0023f2d4317a7afa351fddee601c8f86c Reviewed-on: https://pdfium-review.googlesource.com/38251 Reviewed-by: Daniel Cheng <dcheng@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2018-04-11Fix issues with PDFium third_party/base/span.hTom Sepez
Remove stray const in operator[] that was introduced when downgrading from C++14 to C++11 syntax. Add missing Get() in first() that was introduced when converting to UnownedPtr. Prevent ASAN from flagging spans where the UnownedPtr points to byte N+1 of a N byte object, and the span is empty. This is legal in C for ordinary pointers so long as the pointer isn't de-referenced, but is not allowed per the rules for UnownedPtr. Change-Id: Ic143c5ef4e37c1cf86f0a3e5408be6e2076a85e2 Reviewed-on: https://pdfium-review.googlesource.com/30212 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-04-09Make pdfium::span<> be based off of UnownedPtr<>.Tom Sepez
Because we can get the lifetime check for free if we do this. This requires adding some "constexpr/noexcept" to UnownedPtr to make the types line up with what span.h requires. Change-Id: I45918f8723122082036eed959f769644ab4c509f Reviewed-on: https://pdfium-review.googlesource.com/29672 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2018-04-06Add span.h from chromium base.chromium/3392Tom Sepez
Allows indexing with better bounds-checking to occur. Some small modifications are required to deal with PDFium being intentionally held at C++11 compliance, not C++14. Use in one place as check on correctness. Change-Id: Id2875cf0a93980112bc536a93c4f9ec5306c0dac Reviewed-on: https://pdfium-review.googlesource.com/29671 Commit-Queue: Tom Sepez <tsepez@chromium.org> Reviewed-by: Chris Palmer <palmer@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>