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# Conflicts:
# indra/cmake/CMakeLists.txt
# indra/llcommon/llsdserialize.cpp
# indra/llcommon/llsdserialize.h
# indra/llcommon/tests/llleap_test.cpp
# indra/newview/llfilepicker.h
# indra/newview/llfilepicker_mac.h
# indra/newview/llfilepicker_mac.mm
# indra/newview/skins/default/xui/en/strings.xml
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# Conflicts:
# indra/cmake/Copy3rdPartyLibs.cmake
# indra/cmake/FindOpenJPEG.cmake
# indra/cmake/OpenJPEG.cmake
# indra/integration_tests/llui_libtest/CMakeLists.txt
# indra/newview/CMakeLists.txt
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per Leviathan code review.
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instead of having specific binary, ternary and quaternary overloads.
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The num_periods arguments have all been changed to size_t, but the default
argument values were still coded as S32_MAX. Change to
std::numeric_limits<size_t>::max().
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Not only do the local typedefs make the code less readable, they also rely on
assumptions about the implementation. The standard types are guaranteed by the
C++ library implementation.
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As it happens, the change in the LLUUID::combine() algorithm introduced by one
of my previous commits is causing invalid assets creation (seen with
some clothing items, such as Shape and Universal types); obviously, the server
is using the old algorithm for UUID validation purpose of these assets.
This commit reverts LLUUID::combine() code to use LLMD5.
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keys (#70)
LLUUID and LLMaterialID already have an excellent entropy and value dispersion; there is therefore strictly no need to further (slowly) hash their value for use with std and boost libraries containers.
This commit adds a trivial getDigest64() method to both LLUUID and LLMaterialID (which simply returns the XOR of the two 64 bits long words their value is made of), and uses it in std::hash and hash_value() specializations for use with containers.
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These classes are not trivially copyable because of the mState pointer on an internal
XXH3 state that would have to be explicitely copied.
While it would be possible to add custom copy constructor and operator for them, it
does not really make sense to allow copying an instance of these classes, since all we
care about storing and copying is the digest (which is either an U64 or an LLUUID).
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speed matters. (#64)
This commit adds the HBXX64 and HBXX128 classes for use as a drop-in
replacement for the slow LLMD5 hashing class, where speed matters and
backward compatibility (with standard hashing algorithms) and/or
cryptographic hashing qualities are not required.
It also replaces LLMD5 with HBXX* in a few existing hot (well, ok, just
"warm" for some) paths meeting the above requirements, while paving the way for
future use cases, such as in the DRTVWR-559 and sibling branches where the slow
LLMD5 is used (e.g. to hash materials and vertex buffer cache entries), and
could be use such a (way) faster algorithm with very significant benefits and
no negative impact.
Here is the comment I added in indra/llcommon/hbxx.h:
// HBXXH* classes are to be used where speed matters and cryptographic quality
// is not required (no "one-way" guarantee, though they are likely not worst in
// this respect than MD5 which got busted and is now considered too weak). The
// xxHash code they are built upon is vectorized and about 50 times faster than
// MD5. A 64 bits hash class is also provided for when 128 bits of entropy are
// not needed. The hashes collision rate is similar to MD5's.
// See https://github.com/Cyan4973/xxHash#readme for details.
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# Conflicts:
# autobuild.xml
# indra/newview/llagent.cpp
# indra/newview/llimview.cpp
# indra/newview/llimview.h
# indra/newview/llinventoryfunctions.cpp
# indra/newview/llpanelmediasettingsgeneral.cpp
# indra/newview/pipeline.cpp
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# Conflicts:
# doc/contributions.txt
# indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
# indra/newview/llfloater360capture.cpp
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Looks like pollTick tried to call an already dead process
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The unsigned index arithmetic was problematic in that case.
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Since LLSDSerialize::SIZE_UNLIMITED is negative, passing that through unsigned
size_t parameters could result in peculiar behavior.
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and use it to replace dubious loops in asLLSD() and trimEmpty().
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When sending multiple LEAP packets in the same file (for testing convenience),
use a length prefix instead of delimiting with '\n'. Now that we allow a
serialization format that includes an LLSD format header (e.g.
"<?llsd/binary?>"), '\n' is part of the packet content. But in fact, testing
binary LLSD means we can't pick any delimiter guaranteed not to appear in the
packet content.
Using a length prefix also lets us pass a specific max_bytes to the subject
C++ LLSD parser.
Make llleap_test.cpp use new freestanding Python llsd package when available.
Update Python-side LEAP protocol code to work directly with encoded bytes
stream, avoiding bytes<->str encoding and decoding, which breaks binary LLSD.
Make LLSDSerialize::deserialize() recognize LLSD format header case-
insensitively. Python emits and checks for "llsd/binary", while LLSDSerialize
emits and checks for "LLSD/Binary". Once any of the headers is recognized,
pass corrected max_bytes to the specific parser.
Make deserialize() more careful about the no-header case: preserve '\n' in
content. Introduce debugging code (disabled) because it's a little tricky to
recreate.
Revert LLLeap child process stdout parser from LLSDSerialize::deserialize() to
the specific LLSDNotationParser(), as at present: the generic parser fails one
of LLLeap's integration tests for reasons that remain mysterious.
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Since parsing binary LLSD is faster than parsing notation LLSD, send data from
the viewer to the LEAP plugin child process's stdin in binary instead of
notation.
Similarly, instead of parsing the child process's stdout using specifically a
notation parser, use the generic LLSDSerialize::deserialize() LLSD parser.
Add more LLSDSerialize Python compatibility tests.
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Absent a header from LLSDSerialize::serialize(), make deserialize()
distinguish between XML or notation by recognizing an initial '<'.
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LLSDSerialize::serialize() emits a header string, e.g. "<? llsd/notation ?>"
for notation format. Until now, LLSDSerialize::deserialize() has required that
header to properly decode the input stream.
But none of LLSDBinaryFormatter, LLSDXMLFormatter or LLSDNotationFormatter
emit that header themselves. Nor do any of the Python llsd.format_binary(),
format_xml() or format_notation() functions. Until now, you could not use
LLSD::deserialize() to parse an arbitrary-format LLSD stream serialized by
anything but LLSDSerialize::serialize().
Change LLSDSerialize::deserialize() so that if no header is recognized,
instead of failing, it attempts to parse as notation. Add tests to exercise
this case.
The tricky part about this processing is that deserialize() necessarily reads
some number of bytes from the input stream first, to try to recognize the
header. If it fails to do so, it must prepend the bytes it has already read to
the rest of the input stream since they're probably the beginning of the
serialized data.
To support this use case, introduce cat_streambuf, a std::streambuf subclass
that (virtually) concatenates other std::streambuf instances. When read by a
std::istream, the sequence of underlying std::streambufs appears to the
consumer as a single continuous stream.
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Introduce LLSD template constructors and assignment operators to disambiguate
construction or assignment from any integer type to Integer, likewise any
floating point type to Real. Use new narrow() function to validate
conversions.
For LLSD method parameters converted from LLSD::Integer to size_t, where the
method previously checked for a negative argument, make it now check for
size_t converted from negative: in other words, more than S32_MAX. The risk of
having a parameter forced from negative to unsigned exceeds the risk of a
valid length or index over that max.
In lltracerecording.cpp's PeriodicRecording, now that mCurPeriod and
mNumRecordedPeriods are size_t instead of S32, defend against subtracting 1
from 0.
Use narrow() to validate newly-introduced narrowing conversions.
Make llclamp() return the type of the raw input value, even if the types of
the boundary values differ.
std::ostream::tellp() no longer returns a value we can directly report as a
number. Cast to U64.
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size_t conversions
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conversions
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llssize is for a function parameter that should accept a size or index
(derived from size_t, which is 64 bits in a 64-bit viewer) but might need to
go negative for flag values. We've historically used S32 for that purpose, but
Xcode 14.1 complains about trying to pass size_t to S32.
narrow() is a template function that casts a wider type (e.g. size_t or
llssize) to a narrower type (e.g. S32 or U32), with validation in
RelWithDebInfo builds. It verifies (using assert()) that the value being
truncated can in fact fit into the target type.
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It's a little distressing how often we have historically coded S32 or U32 to
pass a length or index.
There are more such assumptions in other viewer subdirectories, but this is a
start.
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