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Date: Thu, 4 Jul 2024 07:45:59 -0700 (PDT)
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Subject: Re: [bitcoindev] Re: Great Consensus Cleanup Revival
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> This is why we don't use C - unsafe, unclear, unnecessary.
Actually, I think libbitcoin is using its own maintained fork of secp256k1,=
=20
which is written in C.
We do not maintain secp256k1 code. For years that library carried the same=
=20
version, despite regular breaking changes to its API. This compelled us to=
=20
place these different versions on distinct git branches. When it finally=20
became versioned we started phasing this unfortunate practice out.
Out of the 10 repositories and at least half million lines of code, apart=
=20
from an embedded copy of qrencode that we don=E2=80=99t independently maint=
ain, I=20
believe there is only one .c file in use in the entire project - the=20
database mmap.c implementation for msvc builds. This includes hash=20
functions, with vectorization optimizations, etc.
=20
For sure, I wouldn't recommend using C across a whole codebase as it's not=
=20
memory-safe (euphemism) though it's still un-match if you wish to=20
understand low-level memory management in hot paths.
This is a commonly held misperception.
It can be easier to use C++ or Rust, though it doesn't mean it will be as=
=20
(a) perf optimal and (b) hardened against side-channels.
Rust has its own set of problems. No need to get into a language Jihad=20
here. My point was to clarify that the particular question was not about a=
=20
C (or C++) null pointer value, either on the surface or underneath an=20
abstraction.
e=20
--=20
You received this message because you are subscribed to the Google Groups "=
Bitcoin Development Mailing List" group.
To unsubscribe from this group and stop receiving emails from it, send an e=
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<br /><div><blockquote style=3D"margin: 0px 0px 0px 0.8ex; border-left-widt=
h: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); pa=
dding-left: 1ex;"><div dir=3D"ltr"><div>> This is why we don't use C - u=
nsafe, unclear, unnecessary.<br /></div><div><br /></div></div><div dir=3D"=
ltr"><div>Actually, I think libbitcoin is using its own maintained fork of =
secp256k1, which is written in C.</div></div></blockquote><div><br /></div>=
<div>We do not maintain secp256k1 code. For years that library carried the =
same version, despite regular breaking changes to its API. This compelled u=
s to place these different versions on distinct git branches. When<span>=C2=
=A0it finally became versioned we started phasing this unfortunate practice=
out.</span></div><div><span><br /></span></div><div><span>Out of the 10 re=
positories and at least half million lines of code, apart from an embedded =
copy of qrencode that we don=E2=80=99t independently maintain, I believe th=
ere is only one .c file in use in the entire project - the database mmap.c =
implementation for msvc builds. This includes hash functions, with vectoriz=
ation optimizations, etc.</span></div><div>=C2=A0</div><blockquote style=3D=
"margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: soli=
d; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir=3D"l=
tr"><div>For sure, I wouldn't recommend using C across a whole codebase as =
it's not memory-safe (euphemism) though it's still un-match if you wish to =
understand low-level memory management in hot paths.</div></div></blockquot=
e><div><br /></div><div>This is a commonly held misperception.</div><div><b=
r /></div><blockquote style=3D"margin: 0px 0px 0px 0.8ex; border-left-width=
: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); pad=
ding-left: 1ex;"><div dir=3D"ltr"><div>It can be easier to use C++ or Rust,=
though it doesn't mean it will be as (a) perf optimal and (b) hardened aga=
inst side-channels.</div></div></blockquote><div><br /></div><div>Rust has =
its own set of problems. No need to get into a language Jihad here. My poin=
t was to clarify that the particular question was not about a C (or C++) nu=
ll pointer value, either on the surface or underneath an abstraction.</div>=
<div><br /></div><div>e=C2=A0</div></div>
<p></p>
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To view this discussion on the web visit <a href=3D"https://groups.google.c=
om/d/msgid/bitcoindev/a76b8dc5-d37f-4059-882b-207004874887n%40googlegroups.=
com?utm_medium=3Demail&utm_source=3Dfooter">https://groups.google.com/d/msg=
id/bitcoindev/a76b8dc5-d37f-4059-882b-207004874887n%40googlegroups.com</a>.=
<br />
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